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Carsten Otte043405e2007-10-10 17:16:19 +02001/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * derived from drivers/kvm/kvm_main.c
5 *
6 * Copyright (C) 2006 Qumranet, Inc.
Ben-Ami Yassour4d5c5d02008-07-28 19:26:26 +03007 * Copyright (C) 2008 Qumranet, Inc.
8 * Copyright IBM Corporation, 2008
Nicolas Kaiser9611c182010-10-06 14:23:22 +02009 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
Carsten Otte043405e2007-10-10 17:16:19 +020010 *
11 * Authors:
12 * Avi Kivity <avi@qumranet.com>
13 * Yaniv Kamay <yaniv@qumranet.com>
Ben-Ami Yassour4d5c5d02008-07-28 19:26:26 +030014 * Amit Shah <amit.shah@qumranet.com>
15 * Ben-Ami Yassour <benami@il.ibm.com>
Carsten Otte043405e2007-10-10 17:16:19 +020016 *
17 * This work is licensed under the terms of the GNU GPL, version 2. See
18 * the COPYING file in the top-level directory.
19 *
20 */
21
Avi Kivityedf88412007-12-16 11:02:48 +020022#include <linux/kvm_host.h>
Carsten Otte313a3dc2007-10-11 19:16:52 +020023#include "irq.h"
Zhang Xiantao1d737c82007-12-14 09:35:10 +080024#include "mmu.h"
Sheng Yang78376992008-01-28 05:10:22 +080025#include "i8254.h"
Izik Eidus37817f22008-03-24 23:14:53 +020026#include "tss.h"
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030027#include "kvm_cache_regs.h"
Avi Kivity26eef702008-07-03 14:59:22 +030028#include "x86.h"
Carsten Otte313a3dc2007-10-11 19:16:52 +020029
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -020030#include <linux/clocksource.h>
Ben-Ami Yassour4d5c5d02008-07-28 19:26:26 +030031#include <linux/interrupt.h>
Carsten Otte313a3dc2007-10-11 19:16:52 +020032#include <linux/kvm.h>
33#include <linux/fs.h>
34#include <linux/vmalloc.h>
Carsten Otte5fb76f92007-10-29 16:08:51 +010035#include <linux/module.h>
Zhang Xiantao0de10342007-11-20 16:25:04 +080036#include <linux/mman.h>
Marcelo Tosatti2bacc552007-12-12 10:46:12 -050037#include <linux/highmem.h>
Joerg Roedel19de40a2008-12-03 14:43:34 +010038#include <linux/iommu.h>
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +030039#include <linux/intel-iommu.h>
Gerd Hoffmannc8076602009-02-04 17:52:04 +010040#include <linux/cpufreq.h>
Avi Kivity18863bd2009-09-07 11:12:18 +030041#include <linux/user-return-notifier.h>
Marcelo Tosattia983fb22009-12-23 14:35:23 -020042#include <linux/srcu.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090043#include <linux/slab.h>
Zhang, Yanminff9d07a2010-04-19 13:32:45 +080044#include <linux/perf_event.h>
Lai Jiangshan7bee3422010-06-02 17:06:03 +080045#include <linux/uaccess.h>
Gleb Natapovaf585b92010-10-14 11:22:46 +020046#include <linux/hash.h>
Joerg Roedela1b60c12011-09-06 18:46:34 +020047#include <linux/pci.h>
Avi Kivityaec51dc2009-07-01 16:01:02 +030048#include <trace/events/kvm.h>
Xiao Guangrong2ed152a2010-03-10 19:00:43 +080049
Marcelo Tosatti229456f2009-06-17 09:22:14 -030050#define CREATE_TRACE_POINTS
51#include "trace.h"
Carsten Otte043405e2007-10-10 17:16:19 +020052
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +020053#include <asm/debugreg.h>
Zhang Xiantaod825ed02007-11-14 20:08:51 +080054#include <asm/msr.h>
Avi Kivitya5f61302008-02-20 17:57:21 +020055#include <asm/desc.h>
Sheng Yang0bed3b52008-10-09 16:01:54 +080056#include <asm/mtrr.h>
Huang Ying890ca9a2009-05-11 16:48:15 +080057#include <asm/mce.h>
Sheng Yang7cf30852010-05-17 17:08:27 +080058#include <asm/i387.h>
Sheng Yang98918832010-05-17 17:08:28 +080059#include <asm/xcr.h>
Zachary Amsden1d5f0662010-08-19 22:07:30 -100060#include <asm/pvclock.h>
Avi Kivity217fc9c2010-08-26 13:38:03 +030061#include <asm/div64.h>
Carsten Otte043405e2007-10-10 17:16:19 +020062
Carsten Otte313a3dc2007-10-11 19:16:52 +020063#define MAX_IO_MSRS 256
Huang Ying890ca9a2009-05-11 16:48:15 +080064#define KVM_MAX_MCE_BANKS 32
Huang Ying5854dbc2010-10-08 16:24:14 +080065#define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P)
Huang Ying890ca9a2009-05-11 16:48:15 +080066
Avi Kivity0f65dd72011-04-20 13:37:53 +030067#define emul_to_vcpu(ctxt) \
68 container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt)
69
Joerg Roedel50a37eb2008-01-31 14:57:38 +010070/* EFER defaults:
71 * - enable syscall per default because its emulated by KVM
72 * - enable LME and LMA per default on 64 bit KVM
73 */
74#ifdef CONFIG_X86_64
Lai Jiangshan1260edbe2011-02-21 11:51:35 +080075static
76u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA));
Joerg Roedel50a37eb2008-01-31 14:57:38 +010077#else
Lai Jiangshan1260edbe2011-02-21 11:51:35 +080078static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE);
Joerg Roedel50a37eb2008-01-31 14:57:38 +010079#endif
Carsten Otte313a3dc2007-10-11 19:16:52 +020080
Avi Kivityba1389b2007-11-18 16:24:12 +020081#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
82#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
Hollis Blanchard417bc302007-10-31 17:24:23 -050083
Gleb Natapovcb142eb2009-08-09 15:17:40 +030084static void update_cr8_intercept(struct kvm_vcpu *vcpu);
Avi Kivity674eea02008-02-11 18:37:23 +020085static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
86 struct kvm_cpuid_entry2 __user *entries);
Avi Kivity7460fb4a2011-09-20 13:43:14 +030087static void process_nmi(struct kvm_vcpu *vcpu);
Avi Kivity674eea02008-02-11 18:37:23 +020088
Zhang Xiantao97896d02007-11-14 20:09:30 +080089struct kvm_x86_ops *kvm_x86_ops;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030090EXPORT_SYMBOL_GPL(kvm_x86_ops);
Zhang Xiantao97896d02007-11-14 20:09:30 +080091
Andre Przywaraed85c062009-06-25 12:36:49 +020092int ignore_msrs = 0;
93module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR);
94
Joerg Roedel92a1f122011-03-25 09:44:51 +010095bool kvm_has_tsc_control;
96EXPORT_SYMBOL_GPL(kvm_has_tsc_control);
97u32 kvm_max_guest_tsc_khz;
98EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz);
99
Avi Kivity18863bd2009-09-07 11:12:18 +0300100#define KVM_NR_SHARED_MSRS 16
101
102struct kvm_shared_msrs_global {
103 int nr;
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800104 u32 msrs[KVM_NR_SHARED_MSRS];
Avi Kivity18863bd2009-09-07 11:12:18 +0300105};
106
107struct kvm_shared_msrs {
108 struct user_return_notifier urn;
109 bool registered;
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800110 struct kvm_shared_msr_values {
111 u64 host;
112 u64 curr;
113 } values[KVM_NR_SHARED_MSRS];
Avi Kivity18863bd2009-09-07 11:12:18 +0300114};
115
116static struct kvm_shared_msrs_global __read_mostly shared_msrs_global;
117static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs);
118
Hollis Blanchard417bc302007-10-31 17:24:23 -0500119struct kvm_stats_debugfs_item debugfs_entries[] = {
Avi Kivityba1389b2007-11-18 16:24:12 +0200120 { "pf_fixed", VCPU_STAT(pf_fixed) },
121 { "pf_guest", VCPU_STAT(pf_guest) },
122 { "tlb_flush", VCPU_STAT(tlb_flush) },
123 { "invlpg", VCPU_STAT(invlpg) },
124 { "exits", VCPU_STAT(exits) },
125 { "io_exits", VCPU_STAT(io_exits) },
126 { "mmio_exits", VCPU_STAT(mmio_exits) },
127 { "signal_exits", VCPU_STAT(signal_exits) },
128 { "irq_window", VCPU_STAT(irq_window_exits) },
Sheng Yangf08864b2008-05-15 18:23:25 +0800129 { "nmi_window", VCPU_STAT(nmi_window_exits) },
Avi Kivityba1389b2007-11-18 16:24:12 +0200130 { "halt_exits", VCPU_STAT(halt_exits) },
131 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
Amit Shahf11c3a82008-02-21 01:00:30 +0530132 { "hypercalls", VCPU_STAT(hypercalls) },
Avi Kivityba1389b2007-11-18 16:24:12 +0200133 { "request_irq", VCPU_STAT(request_irq_exits) },
134 { "irq_exits", VCPU_STAT(irq_exits) },
135 { "host_state_reload", VCPU_STAT(host_state_reload) },
136 { "efer_reload", VCPU_STAT(efer_reload) },
137 { "fpu_reload", VCPU_STAT(fpu_reload) },
138 { "insn_emulation", VCPU_STAT(insn_emulation) },
139 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
Avi Kivityfa89a812008-09-01 15:57:51 +0300140 { "irq_injections", VCPU_STAT(irq_injections) },
Jan Kiszkac4abb7c2008-09-26 09:30:55 +0200141 { "nmi_injections", VCPU_STAT(nmi_injections) },
Avi Kivity4cee5762007-11-18 16:37:07 +0200142 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
143 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
144 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
145 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
146 { "mmu_flooded", VM_STAT(mmu_flooded) },
147 { "mmu_recycled", VM_STAT(mmu_recycled) },
Avi Kivitydfc5aa02007-12-18 19:47:18 +0200148 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
Marcelo Tosatti4731d4c2008-09-23 13:18:39 -0300149 { "mmu_unsync", VM_STAT(mmu_unsync) },
Avi Kivity0f74a242007-11-20 23:01:14 +0200150 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
Marcelo Tosatti05da4552008-02-23 11:44:30 -0300151 { "largepages", VM_STAT(lpages) },
Hollis Blanchard417bc302007-10-31 17:24:23 -0500152 { NULL }
153};
154
Dexuan Cui2acf9232010-06-10 11:27:12 +0800155u64 __read_mostly host_xcr0;
156
Avi Kivityd6aa1002011-04-20 15:47:13 +0300157int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt);
158
Gleb Natapovaf585b92010-10-14 11:22:46 +0200159static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu)
160{
161 int i;
162 for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++)
163 vcpu->arch.apf.gfns[i] = ~0;
164}
165
Avi Kivity18863bd2009-09-07 11:12:18 +0300166static void kvm_on_user_return(struct user_return_notifier *urn)
167{
168 unsigned slot;
Avi Kivity18863bd2009-09-07 11:12:18 +0300169 struct kvm_shared_msrs *locals
170 = container_of(urn, struct kvm_shared_msrs, urn);
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800171 struct kvm_shared_msr_values *values;
Avi Kivity18863bd2009-09-07 11:12:18 +0300172
173 for (slot = 0; slot < shared_msrs_global.nr; ++slot) {
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800174 values = &locals->values[slot];
175 if (values->host != values->curr) {
176 wrmsrl(shared_msrs_global.msrs[slot], values->host);
177 values->curr = values->host;
Avi Kivity18863bd2009-09-07 11:12:18 +0300178 }
179 }
180 locals->registered = false;
181 user_return_notifier_unregister(urn);
182}
183
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800184static void shared_msr_update(unsigned slot, u32 msr)
Avi Kivity18863bd2009-09-07 11:12:18 +0300185{
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800186 struct kvm_shared_msrs *smsr;
Avi Kivity18863bd2009-09-07 11:12:18 +0300187 u64 value;
188
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800189 smsr = &__get_cpu_var(shared_msrs);
190 /* only read, and nobody should modify it at this time,
191 * so don't need lock */
192 if (slot >= shared_msrs_global.nr) {
193 printk(KERN_ERR "kvm: invalid MSR slot!");
194 return;
195 }
196 rdmsrl_safe(msr, &value);
197 smsr->values[slot].host = value;
198 smsr->values[slot].curr = value;
199}
200
201void kvm_define_shared_msr(unsigned slot, u32 msr)
202{
Avi Kivity18863bd2009-09-07 11:12:18 +0300203 if (slot >= shared_msrs_global.nr)
204 shared_msrs_global.nr = slot + 1;
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800205 shared_msrs_global.msrs[slot] = msr;
206 /* we need ensured the shared_msr_global have been updated */
207 smp_wmb();
Avi Kivity18863bd2009-09-07 11:12:18 +0300208}
209EXPORT_SYMBOL_GPL(kvm_define_shared_msr);
210
211static void kvm_shared_msr_cpu_online(void)
212{
213 unsigned i;
Avi Kivity18863bd2009-09-07 11:12:18 +0300214
215 for (i = 0; i < shared_msrs_global.nr; ++i)
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800216 shared_msr_update(i, shared_msrs_global.msrs[i]);
Avi Kivity18863bd2009-09-07 11:12:18 +0300217}
218
Avi Kivityd5696722009-12-02 12:28:47 +0200219void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask)
Avi Kivity18863bd2009-09-07 11:12:18 +0300220{
221 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
222
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800223 if (((value ^ smsr->values[slot].curr) & mask) == 0)
Avi Kivity18863bd2009-09-07 11:12:18 +0300224 return;
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800225 smsr->values[slot].curr = value;
226 wrmsrl(shared_msrs_global.msrs[slot], value);
Avi Kivity18863bd2009-09-07 11:12:18 +0300227 if (!smsr->registered) {
228 smsr->urn.on_user_return = kvm_on_user_return;
229 user_return_notifier_register(&smsr->urn);
230 smsr->registered = true;
231 }
232}
233EXPORT_SYMBOL_GPL(kvm_set_shared_msr);
234
Avi Kivity3548bab2009-11-28 14:18:47 +0200235static void drop_user_return_notifiers(void *ignore)
236{
237 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
238
239 if (smsr->registered)
240 kvm_on_user_return(&smsr->urn);
241}
242
Carsten Otte6866b832007-10-29 16:09:10 +0100243u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
244{
245 if (irqchip_in_kernel(vcpu->kvm))
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800246 return vcpu->arch.apic_base;
Carsten Otte6866b832007-10-29 16:09:10 +0100247 else
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800248 return vcpu->arch.apic_base;
Carsten Otte6866b832007-10-29 16:09:10 +0100249}
250EXPORT_SYMBOL_GPL(kvm_get_apic_base);
251
252void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
253{
254 /* TODO: reserve bits check */
255 if (irqchip_in_kernel(vcpu->kvm))
256 kvm_lapic_set_base(vcpu, data);
257 else
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800258 vcpu->arch.apic_base = data;
Carsten Otte6866b832007-10-29 16:09:10 +0100259}
260EXPORT_SYMBOL_GPL(kvm_set_apic_base);
261
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200262#define EXCPT_BENIGN 0
263#define EXCPT_CONTRIBUTORY 1
264#define EXCPT_PF 2
265
266static int exception_class(int vector)
267{
268 switch (vector) {
269 case PF_VECTOR:
270 return EXCPT_PF;
271 case DE_VECTOR:
272 case TS_VECTOR:
273 case NP_VECTOR:
274 case SS_VECTOR:
275 case GP_VECTOR:
276 return EXCPT_CONTRIBUTORY;
277 default:
278 break;
279 }
280 return EXCPT_BENIGN;
281}
282
283static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200284 unsigned nr, bool has_error, u32 error_code,
285 bool reinject)
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200286{
287 u32 prev_nr;
288 int class1, class2;
289
Avi Kivity3842d132010-07-27 12:30:24 +0300290 kvm_make_request(KVM_REQ_EVENT, vcpu);
291
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200292 if (!vcpu->arch.exception.pending) {
293 queue:
294 vcpu->arch.exception.pending = true;
295 vcpu->arch.exception.has_error_code = has_error;
296 vcpu->arch.exception.nr = nr;
297 vcpu->arch.exception.error_code = error_code;
Joerg Roedel3f0fd292010-05-05 16:04:41 +0200298 vcpu->arch.exception.reinject = reinject;
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200299 return;
300 }
301
302 /* to check exception */
303 prev_nr = vcpu->arch.exception.nr;
304 if (prev_nr == DF_VECTOR) {
305 /* triple fault -> shutdown */
Avi Kivitya8eeb042010-05-10 12:34:53 +0300306 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200307 return;
308 }
309 class1 = exception_class(prev_nr);
310 class2 = exception_class(nr);
311 if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY)
312 || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) {
313 /* generate double fault per SDM Table 5-5 */
314 vcpu->arch.exception.pending = true;
315 vcpu->arch.exception.has_error_code = true;
316 vcpu->arch.exception.nr = DF_VECTOR;
317 vcpu->arch.exception.error_code = 0;
318 } else
319 /* replace previous exception with a new one in a hope
320 that instruction re-execution will regenerate lost
321 exception */
322 goto queue;
323}
324
Avi Kivity298101d2007-11-25 13:41:11 +0200325void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
326{
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200327 kvm_multiple_exception(vcpu, nr, false, 0, false);
Avi Kivity298101d2007-11-25 13:41:11 +0200328}
329EXPORT_SYMBOL_GPL(kvm_queue_exception);
330
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200331void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr)
332{
333 kvm_multiple_exception(vcpu, nr, false, 0, true);
334}
335EXPORT_SYMBOL_GPL(kvm_requeue_exception);
336
Andre Przywaradb8fcef2010-12-21 11:12:01 +0100337void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err)
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200338{
Andre Przywaradb8fcef2010-12-21 11:12:01 +0100339 if (err)
340 kvm_inject_gp(vcpu, 0);
341 else
342 kvm_x86_ops->skip_emulated_instruction(vcpu);
343}
344EXPORT_SYMBOL_GPL(kvm_complete_insn_gp);
Joerg Roedel8df25a32010-09-10 17:30:46 +0200345
Avi Kivity6389ee92010-11-29 16:12:30 +0200346void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200347{
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200348 ++vcpu->stat.pf_guest;
Avi Kivity6389ee92010-11-29 16:12:30 +0200349 vcpu->arch.cr2 = fault->address;
350 kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code);
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200351}
Nadav Har'El27d6c862011-05-25 23:06:59 +0300352EXPORT_SYMBOL_GPL(kvm_inject_page_fault);
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200353
Avi Kivity6389ee92010-11-29 16:12:30 +0200354void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
Joerg Roedeld4f8cf62010-09-10 17:30:55 +0200355{
Avi Kivity6389ee92010-11-29 16:12:30 +0200356 if (mmu_is_nested(vcpu) && !fault->nested_page_fault)
357 vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault);
Joerg Roedeld4f8cf62010-09-10 17:30:55 +0200358 else
Avi Kivity6389ee92010-11-29 16:12:30 +0200359 vcpu->arch.mmu.inject_page_fault(vcpu, fault);
Joerg Roedeld4f8cf62010-09-10 17:30:55 +0200360}
361
Sheng Yang3419ffc2008-05-15 09:52:48 +0800362void kvm_inject_nmi(struct kvm_vcpu *vcpu)
363{
Avi Kivity7460fb4a2011-09-20 13:43:14 +0300364 atomic_inc(&vcpu->arch.nmi_queued);
365 kvm_make_request(KVM_REQ_NMI, vcpu);
Sheng Yang3419ffc2008-05-15 09:52:48 +0800366}
367EXPORT_SYMBOL_GPL(kvm_inject_nmi);
368
Avi Kivity298101d2007-11-25 13:41:11 +0200369void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
370{
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200371 kvm_multiple_exception(vcpu, nr, true, error_code, false);
Avi Kivity298101d2007-11-25 13:41:11 +0200372}
373EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
374
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200375void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
376{
377 kvm_multiple_exception(vcpu, nr, true, error_code, true);
378}
379EXPORT_SYMBOL_GPL(kvm_requeue_exception_e);
380
Carsten Ottea03490e2007-10-29 16:09:35 +0100381/*
Avi Kivity0a79b002009-09-01 12:03:25 +0300382 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
383 * a #GP and return false.
384 */
385bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl)
Carsten Otte043405e2007-10-10 17:16:19 +0200386{
Avi Kivity0a79b002009-09-01 12:03:25 +0300387 if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl)
388 return true;
389 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
390 return false;
Carsten Ottea03490e2007-10-29 16:09:35 +0100391}
Avi Kivity0a79b002009-09-01 12:03:25 +0300392EXPORT_SYMBOL_GPL(kvm_require_cpl);
Carsten Ottea03490e2007-10-29 16:09:35 +0100393
394/*
Joerg Roedelec92fe42010-09-10 17:30:51 +0200395 * This function will be used to read from the physical memory of the currently
396 * running guest. The difference to kvm_read_guest_page is that this function
397 * can read from guest physical or from the guest's guest physical memory.
398 */
399int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
400 gfn_t ngfn, void *data, int offset, int len,
401 u32 access)
402{
403 gfn_t real_gfn;
404 gpa_t ngpa;
405
406 ngpa = gfn_to_gpa(ngfn);
407 real_gfn = mmu->translate_gpa(vcpu, ngpa, access);
408 if (real_gfn == UNMAPPED_GVA)
409 return -EFAULT;
410
411 real_gfn = gpa_to_gfn(real_gfn);
412
413 return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len);
414}
415EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu);
416
Joerg Roedel3d06b8b2010-09-10 17:30:53 +0200417int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn,
418 void *data, int offset, int len, u32 access)
419{
420 return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn,
421 data, offset, len, access);
422}
423
Joerg Roedelec92fe42010-09-10 17:30:51 +0200424/*
Carsten Ottea03490e2007-10-29 16:09:35 +0100425 * Load the pae pdptrs. Return true is they are all valid.
426 */
Joerg Roedelff03a072010-09-10 17:30:57 +0200427int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3)
Carsten Ottea03490e2007-10-29 16:09:35 +0100428{
429 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
430 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
431 int i;
432 int ret;
Joerg Roedelff03a072010-09-10 17:30:57 +0200433 u64 pdpte[ARRAY_SIZE(mmu->pdptrs)];
Carsten Ottea03490e2007-10-29 16:09:35 +0100434
Joerg Roedelff03a072010-09-10 17:30:57 +0200435 ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte,
436 offset * sizeof(u64), sizeof(pdpte),
437 PFERR_USER_MASK|PFERR_WRITE_MASK);
Carsten Ottea03490e2007-10-29 16:09:35 +0100438 if (ret < 0) {
439 ret = 0;
440 goto out;
441 }
442 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
Avi Kivity43a37952009-06-10 14:12:05 +0300443 if (is_present_gpte(pdpte[i]) &&
Dong, Eddie20c466b2009-03-31 23:03:45 +0800444 (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) {
Carsten Ottea03490e2007-10-29 16:09:35 +0100445 ret = 0;
446 goto out;
447 }
448 }
449 ret = 1;
450
Joerg Roedelff03a072010-09-10 17:30:57 +0200451 memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs));
Avi Kivity6de4f3ad2009-05-31 22:58:47 +0300452 __set_bit(VCPU_EXREG_PDPTR,
453 (unsigned long *)&vcpu->arch.regs_avail);
454 __set_bit(VCPU_EXREG_PDPTR,
455 (unsigned long *)&vcpu->arch.regs_dirty);
Carsten Ottea03490e2007-10-29 16:09:35 +0100456out:
Carsten Ottea03490e2007-10-29 16:09:35 +0100457
458 return ret;
459}
Joerg Roedelcc4b6872008-02-07 13:47:43 +0100460EXPORT_SYMBOL_GPL(load_pdptrs);
Carsten Ottea03490e2007-10-29 16:09:35 +0100461
Avi Kivityd835dfe2007-11-21 02:57:59 +0200462static bool pdptrs_changed(struct kvm_vcpu *vcpu)
463{
Joerg Roedelff03a072010-09-10 17:30:57 +0200464 u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)];
Avi Kivityd835dfe2007-11-21 02:57:59 +0200465 bool changed = true;
Joerg Roedel3d06b8b2010-09-10 17:30:53 +0200466 int offset;
467 gfn_t gfn;
Avi Kivityd835dfe2007-11-21 02:57:59 +0200468 int r;
469
470 if (is_long_mode(vcpu) || !is_pae(vcpu))
471 return false;
472
Avi Kivity6de4f3ad2009-05-31 22:58:47 +0300473 if (!test_bit(VCPU_EXREG_PDPTR,
474 (unsigned long *)&vcpu->arch.regs_avail))
475 return true;
476
Avi Kivity9f8fe502010-12-05 17:30:00 +0200477 gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT;
478 offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1);
Joerg Roedel3d06b8b2010-09-10 17:30:53 +0200479 r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte),
480 PFERR_USER_MASK | PFERR_WRITE_MASK);
Avi Kivityd835dfe2007-11-21 02:57:59 +0200481 if (r < 0)
482 goto out;
Joerg Roedelff03a072010-09-10 17:30:57 +0200483 changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0;
Avi Kivityd835dfe2007-11-21 02:57:59 +0200484out:
Avi Kivityd835dfe2007-11-21 02:57:59 +0200485
486 return changed;
487}
488
Avi Kivity49a9b072010-06-10 17:02:14 +0300489int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
Carsten Ottea03490e2007-10-29 16:09:35 +0100490{
Sheng Yangaad82702010-05-12 16:40:42 +0800491 unsigned long old_cr0 = kvm_read_cr0(vcpu);
492 unsigned long update_bits = X86_CR0_PG | X86_CR0_WP |
493 X86_CR0_CD | X86_CR0_NW;
494
Avi Kivityf9a48e62010-01-06 19:10:22 +0200495 cr0 |= X86_CR0_ET;
496
Gleb Natapovab344822010-01-21 15:28:46 +0200497#ifdef CONFIG_X86_64
Gleb Natapov0f122442010-04-28 19:15:31 +0300498 if (cr0 & 0xffffffff00000000UL)
499 return 1;
Gleb Natapovab344822010-01-21 15:28:46 +0200500#endif
501
502 cr0 &= ~CR0_RESERVED_BITS;
Carsten Ottea03490e2007-10-29 16:09:35 +0100503
Gleb Natapov0f122442010-04-28 19:15:31 +0300504 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD))
505 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100506
Gleb Natapov0f122442010-04-28 19:15:31 +0300507 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE))
508 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100509
510 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
511#ifdef CONFIG_X86_64
Avi Kivityf6801df2010-01-21 15:31:50 +0200512 if ((vcpu->arch.efer & EFER_LME)) {
Carsten Ottea03490e2007-10-29 16:09:35 +0100513 int cs_db, cs_l;
514
Gleb Natapov0f122442010-04-28 19:15:31 +0300515 if (!is_pae(vcpu))
516 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100517 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
Gleb Natapov0f122442010-04-28 19:15:31 +0300518 if (cs_l)
519 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100520 } else
521#endif
Joerg Roedelff03a072010-09-10 17:30:57 +0200522 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu,
Avi Kivity9f8fe502010-12-05 17:30:00 +0200523 kvm_read_cr3(vcpu)))
Gleb Natapov0f122442010-04-28 19:15:31 +0300524 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100525 }
526
527 kvm_x86_ops->set_cr0(vcpu, cr0);
Carsten Ottea03490e2007-10-29 16:09:35 +0100528
Lai Jiangshand170c412011-02-21 11:21:30 +0800529 if ((cr0 ^ old_cr0) & X86_CR0_PG) {
Xiao Guangronge5f3f022010-11-12 14:47:01 +0800530 kvm_clear_async_pf_completion_queue(vcpu);
Lai Jiangshand170c412011-02-21 11:21:30 +0800531 kvm_async_pf_hash_reset(vcpu);
532 }
Xiao Guangronge5f3f022010-11-12 14:47:01 +0800533
Sheng Yangaad82702010-05-12 16:40:42 +0800534 if ((cr0 ^ old_cr0) & update_bits)
535 kvm_mmu_reset_context(vcpu);
Gleb Natapov0f122442010-04-28 19:15:31 +0300536 return 0;
537}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200538EXPORT_SYMBOL_GPL(kvm_set_cr0);
Carsten Ottea03490e2007-10-29 16:09:35 +0100539
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200540void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
Carsten Ottea03490e2007-10-29 16:09:35 +0100541{
Avi Kivity49a9b072010-06-10 17:02:14 +0300542 (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f));
Carsten Ottea03490e2007-10-29 16:09:35 +0100543}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200544EXPORT_SYMBOL_GPL(kvm_lmsw);
Carsten Ottea03490e2007-10-29 16:09:35 +0100545
Dexuan Cui2acf9232010-06-10 11:27:12 +0800546int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
547{
548 u64 xcr0;
549
550 /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */
551 if (index != XCR_XFEATURE_ENABLED_MASK)
552 return 1;
553 xcr0 = xcr;
554 if (kvm_x86_ops->get_cpl(vcpu) != 0)
555 return 1;
556 if (!(xcr0 & XSTATE_FP))
557 return 1;
558 if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE))
559 return 1;
560 if (xcr0 & ~host_xcr0)
561 return 1;
562 vcpu->arch.xcr0 = xcr0;
563 vcpu->guest_xcr0_loaded = 0;
564 return 0;
565}
566
567int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
568{
569 if (__kvm_set_xcr(vcpu, index, xcr)) {
570 kvm_inject_gp(vcpu, 0);
571 return 1;
572 }
573 return 0;
574}
575EXPORT_SYMBOL_GPL(kvm_set_xcr);
576
577static bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu)
578{
579 struct kvm_cpuid_entry2 *best;
580
581 best = kvm_find_cpuid_entry(vcpu, 1, 0);
582 return best && (best->ecx & bit(X86_FEATURE_XSAVE));
583}
584
Yang, Wei Yc68b7342011-06-03 11:13:42 +0800585static bool guest_cpuid_has_smep(struct kvm_vcpu *vcpu)
586{
587 struct kvm_cpuid_entry2 *best;
588
589 best = kvm_find_cpuid_entry(vcpu, 7, 0);
590 return best && (best->ebx & bit(X86_FEATURE_SMEP));
591}
592
Yang, Wei74dc2b42011-06-14 20:10:18 +0800593static bool guest_cpuid_has_fsgsbase(struct kvm_vcpu *vcpu)
594{
595 struct kvm_cpuid_entry2 *best;
596
597 best = kvm_find_cpuid_entry(vcpu, 7, 0);
598 return best && (best->ebx & bit(X86_FEATURE_FSGSBASE));
599}
600
Dexuan Cui2acf9232010-06-10 11:27:12 +0800601static void update_cpuid(struct kvm_vcpu *vcpu)
602{
603 struct kvm_cpuid_entry2 *best;
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +0800604 struct kvm_lapic *apic = vcpu->arch.apic;
605 u32 timer_mode_mask;
Dexuan Cui2acf9232010-06-10 11:27:12 +0800606
607 best = kvm_find_cpuid_entry(vcpu, 1, 0);
608 if (!best)
609 return;
610
611 /* Update OSXSAVE bit */
612 if (cpu_has_xsave && best->function == 0x1) {
613 best->ecx &= ~(bit(X86_FEATURE_OSXSAVE));
614 if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE))
615 best->ecx |= bit(X86_FEATURE_OSXSAVE);
616 }
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +0800617
618 if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
619 best->function == 0x1) {
620 best->ecx |= bit(X86_FEATURE_TSC_DEADLINE_TIMER);
621 timer_mode_mask = 3 << 17;
622 } else
623 timer_mode_mask = 1 << 17;
624
625 if (apic)
626 apic->lapic_timer.timer_mode_mask = timer_mode_mask;
Dexuan Cui2acf9232010-06-10 11:27:12 +0800627}
628
Avi Kivitya83b29c2010-06-10 17:02:15 +0300629int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
Carsten Ottea03490e2007-10-29 16:09:35 +0100630{
Avi Kivityfc78f512009-12-07 12:16:48 +0200631 unsigned long old_cr4 = kvm_read_cr4(vcpu);
Yang, Wei Yc68b7342011-06-03 11:13:42 +0800632 unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE |
633 X86_CR4_PAE | X86_CR4_SMEP;
Gleb Natapov0f122442010-04-28 19:15:31 +0300634 if (cr4 & CR4_RESERVED_BITS)
635 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100636
Dexuan Cui2acf9232010-06-10 11:27:12 +0800637 if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE))
638 return 1;
639
Yang, Wei Yc68b7342011-06-03 11:13:42 +0800640 if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP))
641 return 1;
642
Yang, Wei74dc2b42011-06-14 20:10:18 +0800643 if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_RDWRGSFS))
644 return 1;
645
Carsten Ottea03490e2007-10-29 16:09:35 +0100646 if (is_long_mode(vcpu)) {
Gleb Natapov0f122442010-04-28 19:15:31 +0300647 if (!(cr4 & X86_CR4_PAE))
648 return 1;
Avi Kivitya2edf57f2009-05-24 22:19:00 +0300649 } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
650 && ((cr4 ^ old_cr4) & pdptr_bits)
Avi Kivity9f8fe502010-12-05 17:30:00 +0200651 && !load_pdptrs(vcpu, vcpu->arch.walk_mmu,
652 kvm_read_cr3(vcpu)))
Gleb Natapov0f122442010-04-28 19:15:31 +0300653 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100654
Nadav Har'El5e1746d2011-05-25 23:03:24 +0300655 if (kvm_x86_ops->set_cr4(vcpu, cr4))
Gleb Natapov0f122442010-04-28 19:15:31 +0300656 return 1;
657
Sheng Yangaad82702010-05-12 16:40:42 +0800658 if ((cr4 ^ old_cr4) & pdptr_bits)
659 kvm_mmu_reset_context(vcpu);
Gleb Natapov0f122442010-04-28 19:15:31 +0300660
Dexuan Cui2acf9232010-06-10 11:27:12 +0800661 if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE)
662 update_cpuid(vcpu);
663
Gleb Natapov0f122442010-04-28 19:15:31 +0300664 return 0;
665}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200666EXPORT_SYMBOL_GPL(kvm_set_cr4);
Carsten Ottea03490e2007-10-29 16:09:35 +0100667
Avi Kivity23902182010-06-10 17:02:16 +0300668int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
Carsten Ottea03490e2007-10-29 16:09:35 +0100669{
Avi Kivity9f8fe502010-12-05 17:30:00 +0200670 if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) {
Marcelo Tosatti0ba73cd2008-09-23 13:18:34 -0300671 kvm_mmu_sync_roots(vcpu);
Avi Kivityd835dfe2007-11-21 02:57:59 +0200672 kvm_mmu_flush_tlb(vcpu);
Gleb Natapov0f122442010-04-28 19:15:31 +0300673 return 0;
Avi Kivityd835dfe2007-11-21 02:57:59 +0200674 }
675
Carsten Ottea03490e2007-10-29 16:09:35 +0100676 if (is_long_mode(vcpu)) {
Gleb Natapov0f122442010-04-28 19:15:31 +0300677 if (cr3 & CR3_L_MODE_RESERVED_BITS)
678 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100679 } else {
680 if (is_pae(vcpu)) {
Gleb Natapov0f122442010-04-28 19:15:31 +0300681 if (cr3 & CR3_PAE_RESERVED_BITS)
682 return 1;
Joerg Roedelff03a072010-09-10 17:30:57 +0200683 if (is_paging(vcpu) &&
684 !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3))
Gleb Natapov0f122442010-04-28 19:15:31 +0300685 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100686 }
687 /*
688 * We don't check reserved bits in nonpae mode, because
689 * this isn't enforced, and VMware depends on this.
690 */
691 }
692
Carsten Ottea03490e2007-10-29 16:09:35 +0100693 /*
694 * Does the new cr3 value map to physical memory? (Note, we
695 * catch an invalid cr3 even in real-mode, because it would
696 * cause trouble later on when we turn on paging anyway.)
697 *
698 * A real CPU would silently accept an invalid cr3 and would
699 * attempt to use it - with largely undefined (and often hard
700 * to debug) behavior on the guest side.
701 */
702 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
Gleb Natapov0f122442010-04-28 19:15:31 +0300703 return 1;
704 vcpu->arch.cr3 = cr3;
Avi Kivityaff48ba2010-12-05 18:56:11 +0200705 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
Gleb Natapov0f122442010-04-28 19:15:31 +0300706 vcpu->arch.mmu.new_cr3(vcpu);
707 return 0;
708}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200709EXPORT_SYMBOL_GPL(kvm_set_cr3);
Carsten Ottea03490e2007-10-29 16:09:35 +0100710
Andre Przywaraeea1cff2010-12-21 11:12:00 +0100711int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
Carsten Ottea03490e2007-10-29 16:09:35 +0100712{
Gleb Natapov0f122442010-04-28 19:15:31 +0300713 if (cr8 & CR8_RESERVED_BITS)
714 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100715 if (irqchip_in_kernel(vcpu->kvm))
716 kvm_lapic_set_tpr(vcpu, cr8);
717 else
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800718 vcpu->arch.cr8 = cr8;
Gleb Natapov0f122442010-04-28 19:15:31 +0300719 return 0;
720}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200721EXPORT_SYMBOL_GPL(kvm_set_cr8);
Carsten Ottea03490e2007-10-29 16:09:35 +0100722
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200723unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
Carsten Ottea03490e2007-10-29 16:09:35 +0100724{
725 if (irqchip_in_kernel(vcpu->kvm))
726 return kvm_lapic_get_cr8(vcpu);
727 else
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800728 return vcpu->arch.cr8;
Carsten Ottea03490e2007-10-29 16:09:35 +0100729}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200730EXPORT_SYMBOL_GPL(kvm_get_cr8);
Carsten Ottea03490e2007-10-29 16:09:35 +0100731
Gleb Natapov338dbc92010-04-28 19:15:32 +0300732static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
Gleb Natapov020df072010-04-13 10:05:23 +0300733{
734 switch (dr) {
735 case 0 ... 3:
736 vcpu->arch.db[dr] = val;
737 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
738 vcpu->arch.eff_db[dr] = val;
739 break;
740 case 4:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300741 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
742 return 1; /* #UD */
Gleb Natapov020df072010-04-13 10:05:23 +0300743 /* fall through */
744 case 6:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300745 if (val & 0xffffffff00000000ULL)
746 return -1; /* #GP */
Gleb Natapov020df072010-04-13 10:05:23 +0300747 vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1;
748 break;
749 case 5:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300750 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
751 return 1; /* #UD */
Gleb Natapov020df072010-04-13 10:05:23 +0300752 /* fall through */
753 default: /* 7 */
Gleb Natapov338dbc92010-04-28 19:15:32 +0300754 if (val & 0xffffffff00000000ULL)
755 return -1; /* #GP */
Gleb Natapov020df072010-04-13 10:05:23 +0300756 vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1;
757 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
758 kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7);
759 vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK);
760 }
761 break;
762 }
763
764 return 0;
765}
Gleb Natapov338dbc92010-04-28 19:15:32 +0300766
767int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
768{
769 int res;
770
771 res = __kvm_set_dr(vcpu, dr, val);
772 if (res > 0)
773 kvm_queue_exception(vcpu, UD_VECTOR);
774 else if (res < 0)
775 kvm_inject_gp(vcpu, 0);
776
777 return res;
778}
Gleb Natapov020df072010-04-13 10:05:23 +0300779EXPORT_SYMBOL_GPL(kvm_set_dr);
780
Gleb Natapov338dbc92010-04-28 19:15:32 +0300781static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
Gleb Natapov020df072010-04-13 10:05:23 +0300782{
783 switch (dr) {
784 case 0 ... 3:
785 *val = vcpu->arch.db[dr];
786 break;
787 case 4:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300788 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
Gleb Natapov020df072010-04-13 10:05:23 +0300789 return 1;
Gleb Natapov020df072010-04-13 10:05:23 +0300790 /* fall through */
791 case 6:
792 *val = vcpu->arch.dr6;
793 break;
794 case 5:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300795 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
Gleb Natapov020df072010-04-13 10:05:23 +0300796 return 1;
Gleb Natapov020df072010-04-13 10:05:23 +0300797 /* fall through */
798 default: /* 7 */
799 *val = vcpu->arch.dr7;
800 break;
801 }
802
803 return 0;
804}
Gleb Natapov338dbc92010-04-28 19:15:32 +0300805
806int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
807{
808 if (_kvm_get_dr(vcpu, dr, val)) {
809 kvm_queue_exception(vcpu, UD_VECTOR);
810 return 1;
811 }
812 return 0;
813}
Gleb Natapov020df072010-04-13 10:05:23 +0300814EXPORT_SYMBOL_GPL(kvm_get_dr);
815
Carsten Otte043405e2007-10-10 17:16:19 +0200816/*
817 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
818 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
819 *
820 * This list is modified at module load time to reflect the
Glauber Costae3267cb2009-10-06 13:24:50 -0400821 * capabilities of the host cpu. This capabilities test skips MSRs that are
822 * kvm-specific. Those are put in the beginning of the list.
Carsten Otte043405e2007-10-10 17:16:19 +0200823 */
Glauber Costae3267cb2009-10-06 13:24:50 -0400824
Glauber Costac9aaa892011-07-11 15:28:14 -0400825#define KVM_SAVE_MSRS_BEGIN 9
Carsten Otte043405e2007-10-10 17:16:19 +0200826static u32 msrs_to_save[] = {
Glauber Costae3267cb2009-10-06 13:24:50 -0400827 MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
Glauber Costa11c6bff2010-05-11 12:17:41 -0400828 MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW,
Gleb Natapov55cd8e52010-01-17 15:51:22 +0200829 HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
Glauber Costac9aaa892011-07-11 15:28:14 -0400830 HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
Carsten Otte043405e2007-10-10 17:16:19 +0200831 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
Brian Gerst8c065852010-07-17 09:03:26 -0400832 MSR_STAR,
Carsten Otte043405e2007-10-10 17:16:19 +0200833#ifdef CONFIG_X86_64
834 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
835#endif
Avi Kivitye90aa412010-09-01 10:23:35 +0300836 MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA
Carsten Otte043405e2007-10-10 17:16:19 +0200837};
838
839static unsigned num_msrs_to_save;
840
841static u32 emulated_msrs[] = {
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +0800842 MSR_IA32_TSCDEADLINE,
Carsten Otte043405e2007-10-10 17:16:19 +0200843 MSR_IA32_MISC_ENABLE,
Avi Kivity908e75f2010-07-07 14:09:38 +0300844 MSR_IA32_MCG_STATUS,
845 MSR_IA32_MCG_CTL,
Carsten Otte043405e2007-10-10 17:16:19 +0200846};
847
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200848static int set_efer(struct kvm_vcpu *vcpu, u64 efer)
Carsten Otte15c4a642007-10-30 18:44:17 +0100849{
Sheng Yangaad82702010-05-12 16:40:42 +0800850 u64 old_efer = vcpu->arch.efer;
851
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200852 if (efer & efer_reserved_bits)
853 return 1;
Carsten Otte15c4a642007-10-30 18:44:17 +0100854
855 if (is_paging(vcpu)
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200856 && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME))
857 return 1;
Carsten Otte15c4a642007-10-30 18:44:17 +0100858
Alexander Graf1b2fd702009-02-02 16:23:51 +0100859 if (efer & EFER_FFXSR) {
860 struct kvm_cpuid_entry2 *feat;
861
862 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200863 if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT)))
864 return 1;
Alexander Graf1b2fd702009-02-02 16:23:51 +0100865 }
866
Alexander Grafd8017472008-11-25 20:17:11 +0100867 if (efer & EFER_SVME) {
868 struct kvm_cpuid_entry2 *feat;
869
870 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200871 if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM)))
872 return 1;
Alexander Grafd8017472008-11-25 20:17:11 +0100873 }
874
Carsten Otte15c4a642007-10-30 18:44:17 +0100875 efer &= ~EFER_LMA;
Avi Kivityf6801df2010-01-21 15:31:50 +0200876 efer |= vcpu->arch.efer & EFER_LMA;
Carsten Otte15c4a642007-10-30 18:44:17 +0100877
Sheng Yanga3d204e2010-05-12 16:40:40 +0800878 kvm_x86_ops->set_efer(vcpu, efer);
879
Avi Kivity9645bb562009-03-31 11:31:54 +0300880 vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200881
Sheng Yangaad82702010-05-12 16:40:42 +0800882 /* Update reserved bits */
883 if ((efer ^ old_efer) & EFER_NX)
884 kvm_mmu_reset_context(vcpu);
885
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200886 return 0;
Carsten Otte15c4a642007-10-30 18:44:17 +0100887}
888
Joerg Roedelf2b4b7d2008-01-31 14:57:37 +0100889void kvm_enable_efer_bits(u64 mask)
890{
891 efer_reserved_bits &= ~mask;
892}
893EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
894
895
Carsten Otte15c4a642007-10-30 18:44:17 +0100896/*
897 * Writes msr value into into the appropriate "register".
898 * Returns 0 on success, non-0 otherwise.
899 * Assumes vcpu_load() was already called.
900 */
901int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
902{
903 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
904}
905
Carsten Otte313a3dc2007-10-11 19:16:52 +0200906/*
907 * Adapt set_msr() to msr_io()'s calling convention
908 */
909static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
910{
911 return kvm_set_msr(vcpu, index, *data);
912}
913
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200914static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
915{
Avi Kivity9ed3c442010-05-04 15:00:37 +0300916 int version;
917 int r;
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200918 struct pvclock_wall_clock wc;
Jason Wang923de3c2010-01-27 19:13:49 +0800919 struct timespec boot;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200920
921 if (!wall_clock)
922 return;
923
Avi Kivity9ed3c442010-05-04 15:00:37 +0300924 r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version));
925 if (r)
926 return;
927
928 if (version & 1)
929 ++version; /* first time write, random junk */
930
931 ++version;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200932
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200933 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
934
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200935 /*
936 * The guest calculates current wall clock time by adding
Zachary Amsden34c238a2010-09-18 14:38:14 -1000937 * system time (updated by kvm_guest_time_update below) to the
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200938 * wall clock specified here. guest system time equals host
939 * system time for us, thus we must fill in host boot time here.
940 */
Jason Wang923de3c2010-01-27 19:13:49 +0800941 getboottime(&boot);
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200942
943 wc.sec = boot.tv_sec;
944 wc.nsec = boot.tv_nsec;
945 wc.version = version;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200946
947 kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc));
948
949 version++;
950 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200951}
952
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200953static uint32_t div_frac(uint32_t dividend, uint32_t divisor)
954{
955 uint32_t quotient, remainder;
956
957 /* Don't try to replace with do_div(), this one calculates
958 * "(dividend << 32) / divisor" */
959 __asm__ ( "divl %4"
960 : "=a" (quotient), "=d" (remainder)
961 : "0" (0), "1" (dividend), "r" (divisor) );
962 return quotient;
963}
964
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000965static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz,
966 s8 *pshift, u32 *pmultiplier)
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200967{
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000968 uint64_t scaled64;
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200969 int32_t shift = 0;
970 uint64_t tps64;
971 uint32_t tps32;
972
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000973 tps64 = base_khz * 1000LL;
974 scaled64 = scaled_khz * 1000LL;
Jan Kiszka50933622010-09-26 13:00:53 +0200975 while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) {
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200976 tps64 >>= 1;
977 shift--;
978 }
979
980 tps32 = (uint32_t)tps64;
Jan Kiszka50933622010-09-26 13:00:53 +0200981 while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) {
982 if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000)
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000983 scaled64 >>= 1;
984 else
985 tps32 <<= 1;
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200986 shift++;
987 }
988
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000989 *pshift = shift;
990 *pmultiplier = div_frac(scaled64, tps32);
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200991
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000992 pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n",
993 __func__, base_khz, scaled_khz, shift, *pmultiplier);
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200994}
995
Zachary Amsden759379d2010-08-19 22:07:25 -1000996static inline u64 get_kernel_ns(void)
997{
998 struct timespec ts;
999
1000 WARN_ON(preemptible());
1001 ktime_get_ts(&ts);
1002 monotonic_to_bootbased(&ts);
1003 return timespec_to_ns(&ts);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001004}
1005
Gerd Hoffmannc8076602009-02-04 17:52:04 +01001006static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz);
Zachary Amsdenc2855452010-09-18 14:38:15 -10001007unsigned long max_tsc_khz;
Gerd Hoffmannc8076602009-02-04 17:52:04 +01001008
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001009static inline int kvm_tsc_changes_freq(void)
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001010{
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001011 int cpu = get_cpu();
1012 int ret = !boot_cpu_has(X86_FEATURE_CONSTANT_TSC) &&
1013 cpufreq_quick_get(cpu) != 0;
1014 put_cpu();
1015 return ret;
1016}
1017
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001018u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu)
Joerg Roedel1e993612011-03-25 09:44:47 +01001019{
1020 if (vcpu->arch.virtual_tsc_khz)
1021 return vcpu->arch.virtual_tsc_khz;
1022 else
1023 return __this_cpu_read(cpu_tsc_khz);
1024}
1025
Joerg Roedel857e4092011-03-25 09:44:50 +01001026static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec)
Zachary Amsden759379d2010-08-19 22:07:25 -10001027{
Avi Kivity217fc9c2010-08-26 13:38:03 +03001028 u64 ret;
1029
Zachary Amsden759379d2010-08-19 22:07:25 -10001030 WARN_ON(preemptible());
1031 if (kvm_tsc_changes_freq())
1032 printk_once(KERN_WARNING
1033 "kvm: unreliable cycle conversion on adjustable rate TSC\n");
Joerg Roedel857e4092011-03-25 09:44:50 +01001034 ret = nsec * vcpu_tsc_khz(vcpu);
Avi Kivity217fc9c2010-08-26 13:38:03 +03001035 do_div(ret, USEC_PER_SEC);
1036 return ret;
Zachary Amsden759379d2010-08-19 22:07:25 -10001037}
1038
Joerg Roedel1e993612011-03-25 09:44:47 +01001039static void kvm_init_tsc_catchup(struct kvm_vcpu *vcpu, u32 this_tsc_khz)
Zachary Amsdenc2855452010-09-18 14:38:15 -10001040{
1041 /* Compute a scale to convert nanoseconds in TSC cycles */
1042 kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000,
Joerg Roedel1e993612011-03-25 09:44:47 +01001043 &vcpu->arch.tsc_catchup_shift,
1044 &vcpu->arch.tsc_catchup_mult);
Zachary Amsdenc2855452010-09-18 14:38:15 -10001045}
1046
1047static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns)
1048{
1049 u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.last_tsc_nsec,
Joerg Roedel1e993612011-03-25 09:44:47 +01001050 vcpu->arch.tsc_catchup_mult,
1051 vcpu->arch.tsc_catchup_shift);
Zachary Amsdenc2855452010-09-18 14:38:15 -10001052 tsc += vcpu->arch.last_tsc_write;
1053 return tsc;
1054}
1055
Zachary Amsden99e3e302010-08-19 22:07:17 -10001056void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data)
1057{
1058 struct kvm *kvm = vcpu->kvm;
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001059 u64 offset, ns, elapsed;
Zachary Amsden99e3e302010-08-19 22:07:17 -10001060 unsigned long flags;
Zachary Amsden46543ba2010-08-19 22:07:26 -10001061 s64 sdiff;
Zachary Amsden99e3e302010-08-19 22:07:17 -10001062
Jan Kiszka038f8c12011-02-04 10:49:11 +01001063 raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags);
Joerg Roedel857e4092011-03-25 09:44:50 +01001064 offset = kvm_x86_ops->compute_tsc_offset(vcpu, data);
Zachary Amsden759379d2010-08-19 22:07:25 -10001065 ns = get_kernel_ns();
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001066 elapsed = ns - kvm->arch.last_tsc_nsec;
Zachary Amsden46543ba2010-08-19 22:07:26 -10001067 sdiff = data - kvm->arch.last_tsc_write;
1068 if (sdiff < 0)
1069 sdiff = -sdiff;
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001070
1071 /*
Zachary Amsden46543ba2010-08-19 22:07:26 -10001072 * Special case: close write to TSC within 5 seconds of
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001073 * another CPU is interpreted as an attempt to synchronize
Lucas De Marchi0d2eb442011-03-17 16:24:16 -03001074 * The 5 seconds is to accommodate host load / swapping as
Zachary Amsden46543ba2010-08-19 22:07:26 -10001075 * well as any reset of TSC during the boot process.
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001076 *
1077 * In that case, for a reliable TSC, we can match TSC offsets,
Zachary Amsden46543ba2010-08-19 22:07:26 -10001078 * or make a best guest using elapsed value.
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001079 */
Joerg Roedel857e4092011-03-25 09:44:50 +01001080 if (sdiff < nsec_to_cycles(vcpu, 5ULL * NSEC_PER_SEC) &&
Zachary Amsden46543ba2010-08-19 22:07:26 -10001081 elapsed < 5ULL * NSEC_PER_SEC) {
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001082 if (!check_tsc_unstable()) {
1083 offset = kvm->arch.last_tsc_offset;
1084 pr_debug("kvm: matched tsc offset for %llu\n", data);
1085 } else {
Joerg Roedel857e4092011-03-25 09:44:50 +01001086 u64 delta = nsec_to_cycles(vcpu, elapsed);
Zachary Amsden759379d2010-08-19 22:07:25 -10001087 offset += delta;
1088 pr_debug("kvm: adjusted tsc offset by %llu\n", delta);
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001089 }
1090 ns = kvm->arch.last_tsc_nsec;
1091 }
1092 kvm->arch.last_tsc_nsec = ns;
1093 kvm->arch.last_tsc_write = data;
1094 kvm->arch.last_tsc_offset = offset;
Zachary Amsden99e3e302010-08-19 22:07:17 -10001095 kvm_x86_ops->write_tsc_offset(vcpu, offset);
Jan Kiszka038f8c12011-02-04 10:49:11 +01001096 raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags);
Zachary Amsden99e3e302010-08-19 22:07:17 -10001097
1098 /* Reset of TSC must disable overshoot protection below */
1099 vcpu->arch.hv_clock.tsc_timestamp = 0;
Zachary Amsdenc2855452010-09-18 14:38:15 -10001100 vcpu->arch.last_tsc_write = data;
1101 vcpu->arch.last_tsc_nsec = ns;
Zachary Amsden99e3e302010-08-19 22:07:17 -10001102}
1103EXPORT_SYMBOL_GPL(kvm_write_tsc);
1104
Zachary Amsden34c238a2010-09-18 14:38:14 -10001105static int kvm_guest_time_update(struct kvm_vcpu *v)
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001106{
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001107 unsigned long flags;
1108 struct kvm_vcpu_arch *vcpu = &v->arch;
1109 void *shared_kaddr;
Avi Kivity463656c2009-04-12 15:49:07 +03001110 unsigned long this_tsc_khz;
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001111 s64 kernel_ns, max_kernel_ns;
1112 u64 tsc_timestamp;
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +02001113
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001114 /* Keep irq disabled to prevent changes to the clock */
1115 local_irq_save(flags);
Nadav Har'Eld5c17852011-08-02 15:54:20 +03001116 tsc_timestamp = kvm_x86_ops->read_l1_tsc(v);
Zachary Amsden759379d2010-08-19 22:07:25 -10001117 kernel_ns = get_kernel_ns();
Joerg Roedel1e993612011-03-25 09:44:47 +01001118 this_tsc_khz = vcpu_tsc_khz(v);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001119 if (unlikely(this_tsc_khz == 0)) {
Zachary Amsdenc2855452010-09-18 14:38:15 -10001120 local_irq_restore(flags);
Zachary Amsden34c238a2010-09-18 14:38:14 -10001121 kvm_make_request(KVM_REQ_CLOCK_UPDATE, v);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001122 return 1;
1123 }
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001124
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001125 /*
Zachary Amsdenc2855452010-09-18 14:38:15 -10001126 * We may have to catch up the TSC to match elapsed wall clock
1127 * time for two reasons, even if kvmclock is used.
1128 * 1) CPU could have been running below the maximum TSC rate
1129 * 2) Broken TSC compensation resets the base at each VCPU
1130 * entry to avoid unknown leaps of TSC even when running
1131 * again on the same CPU. This may cause apparent elapsed
1132 * time to disappear, and the guest to stand still or run
1133 * very slowly.
1134 */
1135 if (vcpu->tsc_catchup) {
1136 u64 tsc = compute_guest_tsc(v, kernel_ns);
1137 if (tsc > tsc_timestamp) {
1138 kvm_x86_ops->adjust_tsc_offset(v, tsc - tsc_timestamp);
1139 tsc_timestamp = tsc;
1140 }
1141 }
1142
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001143 local_irq_restore(flags);
1144
Zachary Amsdenc2855452010-09-18 14:38:15 -10001145 if (!vcpu->time_page)
1146 return 0;
1147
1148 /*
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001149 * Time as measured by the TSC may go backwards when resetting the base
1150 * tsc_timestamp. The reason for this is that the TSC resolution is
1151 * higher than the resolution of the other clock scales. Thus, many
1152 * possible measurments of the TSC correspond to one measurement of any
1153 * other clock, and so a spread of values is possible. This is not a
1154 * problem for the computation of the nanosecond clock; with TSC rates
1155 * around 1GHZ, there can only be a few cycles which correspond to one
1156 * nanosecond value, and any path through this code will inevitably
1157 * take longer than that. However, with the kernel_ns value itself,
1158 * the precision may be much lower, down to HZ granularity. If the
1159 * first sampling of TSC against kernel_ns ends in the low part of the
1160 * range, and the second in the high end of the range, we can get:
1161 *
1162 * (TSC - offset_low) * S + kns_old > (TSC - offset_high) * S + kns_new
1163 *
1164 * As the sampling errors potentially range in the thousands of cycles,
1165 * it is possible such a time value has already been observed by the
1166 * guest. To protect against this, we must compute the system time as
1167 * observed by the guest and ensure the new system time is greater.
1168 */
1169 max_kernel_ns = 0;
1170 if (vcpu->hv_clock.tsc_timestamp && vcpu->last_guest_tsc) {
1171 max_kernel_ns = vcpu->last_guest_tsc -
1172 vcpu->hv_clock.tsc_timestamp;
1173 max_kernel_ns = pvclock_scale_delta(max_kernel_ns,
1174 vcpu->hv_clock.tsc_to_system_mul,
1175 vcpu->hv_clock.tsc_shift);
1176 max_kernel_ns += vcpu->last_kernel_ns;
1177 }
1178
Zachary Amsdene48672f2010-08-19 22:07:23 -10001179 if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) {
Zachary Amsden5f4e3f82010-09-18 14:38:13 -10001180 kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz,
1181 &vcpu->hv_clock.tsc_shift,
1182 &vcpu->hv_clock.tsc_to_system_mul);
Zachary Amsdene48672f2010-08-19 22:07:23 -10001183 vcpu->hw_tsc_khz = this_tsc_khz;
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001184 }
1185
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001186 if (max_kernel_ns > kernel_ns)
1187 kernel_ns = max_kernel_ns;
1188
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001189 /* With all the info we got, fill in the values */
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001190 vcpu->hv_clock.tsc_timestamp = tsc_timestamp;
Zachary Amsden759379d2010-08-19 22:07:25 -10001191 vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset;
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001192 vcpu->last_kernel_ns = kernel_ns;
Zachary Amsden28e46392010-09-18 14:38:12 -10001193 vcpu->last_guest_tsc = tsc_timestamp;
Glauber Costa371bcf62010-05-11 12:17:46 -04001194 vcpu->hv_clock.flags = 0;
1195
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001196 /*
1197 * The interface expects us to write an even number signaling that the
1198 * update is finished. Since the guest won't see the intermediate
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +02001199 * state, we just increase by 2 at the end.
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001200 */
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +02001201 vcpu->hv_clock.version += 2;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001202
1203 shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0);
1204
1205 memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock,
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +02001206 sizeof(vcpu->hv_clock));
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001207
1208 kunmap_atomic(shared_kaddr, KM_USER0);
1209
1210 mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001211 return 0;
Gerd Hoffmannc8076602009-02-04 17:52:04 +01001212}
1213
Avi Kivity9ba075a2008-05-26 20:06:35 +03001214static bool msr_mtrr_valid(unsigned msr)
1215{
1216 switch (msr) {
1217 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1:
1218 case MSR_MTRRfix64K_00000:
1219 case MSR_MTRRfix16K_80000:
1220 case MSR_MTRRfix16K_A0000:
1221 case MSR_MTRRfix4K_C0000:
1222 case MSR_MTRRfix4K_C8000:
1223 case MSR_MTRRfix4K_D0000:
1224 case MSR_MTRRfix4K_D8000:
1225 case MSR_MTRRfix4K_E0000:
1226 case MSR_MTRRfix4K_E8000:
1227 case MSR_MTRRfix4K_F0000:
1228 case MSR_MTRRfix4K_F8000:
1229 case MSR_MTRRdefType:
1230 case MSR_IA32_CR_PAT:
1231 return true;
1232 case 0x2f8:
1233 return true;
1234 }
1235 return false;
1236}
1237
Marcelo Tosattid6289b92009-06-22 15:27:56 -03001238static bool valid_pat_type(unsigned t)
1239{
1240 return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
1241}
1242
1243static bool valid_mtrr_type(unsigned t)
1244{
1245 return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */
1246}
1247
1248static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1249{
1250 int i;
1251
1252 if (!msr_mtrr_valid(msr))
1253 return false;
1254
1255 if (msr == MSR_IA32_CR_PAT) {
1256 for (i = 0; i < 8; i++)
1257 if (!valid_pat_type((data >> (i * 8)) & 0xff))
1258 return false;
1259 return true;
1260 } else if (msr == MSR_MTRRdefType) {
1261 if (data & ~0xcff)
1262 return false;
1263 return valid_mtrr_type(data & 0xff);
1264 } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) {
1265 for (i = 0; i < 8 ; i++)
1266 if (!valid_mtrr_type((data >> (i * 8)) & 0xff))
1267 return false;
1268 return true;
1269 }
1270
1271 /* variable MTRRs */
1272 return valid_mtrr_type(data & 0xff);
1273}
1274
Avi Kivity9ba075a2008-05-26 20:06:35 +03001275static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1276{
Sheng Yang0bed3b52008-10-09 16:01:54 +08001277 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1278
Marcelo Tosattid6289b92009-06-22 15:27:56 -03001279 if (!mtrr_valid(vcpu, msr, data))
Avi Kivity9ba075a2008-05-26 20:06:35 +03001280 return 1;
1281
Sheng Yang0bed3b52008-10-09 16:01:54 +08001282 if (msr == MSR_MTRRdefType) {
1283 vcpu->arch.mtrr_state.def_type = data;
1284 vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10;
1285 } else if (msr == MSR_MTRRfix64K_00000)
1286 p[0] = data;
1287 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1288 p[1 + msr - MSR_MTRRfix16K_80000] = data;
1289 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1290 p[3 + msr - MSR_MTRRfix4K_C0000] = data;
1291 else if (msr == MSR_IA32_CR_PAT)
1292 vcpu->arch.pat = data;
1293 else { /* Variable MTRRs */
1294 int idx, is_mtrr_mask;
1295 u64 *pt;
1296
1297 idx = (msr - 0x200) / 2;
1298 is_mtrr_mask = msr - 0x200 - 2 * idx;
1299 if (!is_mtrr_mask)
1300 pt =
1301 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1302 else
1303 pt =
1304 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1305 *pt = data;
1306 }
1307
1308 kvm_mmu_reset_context(vcpu);
Avi Kivity9ba075a2008-05-26 20:06:35 +03001309 return 0;
1310}
Carsten Otte15c4a642007-10-30 18:44:17 +01001311
Huang Ying890ca9a2009-05-11 16:48:15 +08001312static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1313{
1314 u64 mcg_cap = vcpu->arch.mcg_cap;
1315 unsigned bank_num = mcg_cap & 0xff;
1316
1317 switch (msr) {
1318 case MSR_IA32_MCG_STATUS:
1319 vcpu->arch.mcg_status = data;
1320 break;
1321 case MSR_IA32_MCG_CTL:
1322 if (!(mcg_cap & MCG_CTL_P))
1323 return 1;
1324 if (data != 0 && data != ~(u64)0)
1325 return -1;
1326 vcpu->arch.mcg_ctl = data;
1327 break;
1328 default:
1329 if (msr >= MSR_IA32_MC0_CTL &&
1330 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1331 u32 offset = msr - MSR_IA32_MC0_CTL;
Andre Przywara114be422010-03-24 17:46:42 +01001332 /* only 0 or all 1s can be written to IA32_MCi_CTL
1333 * some Linux kernels though clear bit 10 in bank 4 to
1334 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
1335 * this to avoid an uncatched #GP in the guest
1336 */
Huang Ying890ca9a2009-05-11 16:48:15 +08001337 if ((offset & 0x3) == 0 &&
Andre Przywara114be422010-03-24 17:46:42 +01001338 data != 0 && (data | (1 << 10)) != ~(u64)0)
Huang Ying890ca9a2009-05-11 16:48:15 +08001339 return -1;
1340 vcpu->arch.mce_banks[offset] = data;
1341 break;
1342 }
1343 return 1;
1344 }
1345 return 0;
1346}
1347
Ed Swierkffde22a2009-10-15 15:21:43 -07001348static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data)
1349{
1350 struct kvm *kvm = vcpu->kvm;
1351 int lm = is_long_mode(vcpu);
1352 u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64
1353 : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32;
1354 u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64
1355 : kvm->arch.xen_hvm_config.blob_size_32;
1356 u32 page_num = data & ~PAGE_MASK;
1357 u64 page_addr = data & PAGE_MASK;
1358 u8 *page;
1359 int r;
1360
1361 r = -E2BIG;
1362 if (page_num >= blob_size)
1363 goto out;
1364 r = -ENOMEM;
1365 page = kzalloc(PAGE_SIZE, GFP_KERNEL);
1366 if (!page)
1367 goto out;
1368 r = -EFAULT;
1369 if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE))
1370 goto out_free;
1371 if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE))
1372 goto out_free;
1373 r = 0;
1374out_free:
1375 kfree(page);
1376out:
1377 return r;
1378}
1379
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001380static bool kvm_hv_hypercall_enabled(struct kvm *kvm)
1381{
1382 return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
1383}
1384
1385static bool kvm_hv_msr_partition_wide(u32 msr)
1386{
1387 bool r = false;
1388 switch (msr) {
1389 case HV_X64_MSR_GUEST_OS_ID:
1390 case HV_X64_MSR_HYPERCALL:
1391 r = true;
1392 break;
1393 }
1394
1395 return r;
1396}
1397
1398static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1399{
1400 struct kvm *kvm = vcpu->kvm;
1401
1402 switch (msr) {
1403 case HV_X64_MSR_GUEST_OS_ID:
1404 kvm->arch.hv_guest_os_id = data;
1405 /* setting guest os id to zero disables hypercall page */
1406 if (!kvm->arch.hv_guest_os_id)
1407 kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
1408 break;
1409 case HV_X64_MSR_HYPERCALL: {
1410 u64 gfn;
1411 unsigned long addr;
1412 u8 instructions[4];
1413
1414 /* if guest os id is not set hypercall should remain disabled */
1415 if (!kvm->arch.hv_guest_os_id)
1416 break;
1417 if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
1418 kvm->arch.hv_hypercall = data;
1419 break;
1420 }
1421 gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
1422 addr = gfn_to_hva(kvm, gfn);
1423 if (kvm_is_error_hva(addr))
1424 return 1;
1425 kvm_x86_ops->patch_hypercall(vcpu, instructions);
1426 ((unsigned char *)instructions)[3] = 0xc3; /* ret */
Xiao Guangrong8b0cedf2011-05-15 23:22:04 +08001427 if (__copy_to_user((void __user *)addr, instructions, 4))
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001428 return 1;
1429 kvm->arch.hv_hypercall = data;
1430 break;
1431 }
1432 default:
1433 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1434 "data 0x%llx\n", msr, data);
1435 return 1;
1436 }
1437 return 0;
1438}
1439
1440static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1441{
Gleb Natapov10388a02010-01-17 15:51:23 +02001442 switch (msr) {
1443 case HV_X64_MSR_APIC_ASSIST_PAGE: {
1444 unsigned long addr;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001445
Gleb Natapov10388a02010-01-17 15:51:23 +02001446 if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
1447 vcpu->arch.hv_vapic = data;
1448 break;
1449 }
1450 addr = gfn_to_hva(vcpu->kvm, data >>
1451 HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
1452 if (kvm_is_error_hva(addr))
1453 return 1;
Xiao Guangrong8b0cedf2011-05-15 23:22:04 +08001454 if (__clear_user((void __user *)addr, PAGE_SIZE))
Gleb Natapov10388a02010-01-17 15:51:23 +02001455 return 1;
1456 vcpu->arch.hv_vapic = data;
1457 break;
1458 }
1459 case HV_X64_MSR_EOI:
1460 return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
1461 case HV_X64_MSR_ICR:
1462 return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
1463 case HV_X64_MSR_TPR:
1464 return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
1465 default:
1466 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1467 "data 0x%llx\n", msr, data);
1468 return 1;
1469 }
1470
1471 return 0;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001472}
1473
Gleb Natapov344d9582010-10-14 11:22:50 +02001474static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data)
1475{
1476 gpa_t gpa = data & ~0x3f;
1477
Gleb Natapov6adba522010-10-14 11:22:55 +02001478 /* Bits 2:5 are resrved, Should be zero */
1479 if (data & 0x3c)
Gleb Natapov344d9582010-10-14 11:22:50 +02001480 return 1;
1481
1482 vcpu->arch.apf.msr_val = data;
1483
1484 if (!(data & KVM_ASYNC_PF_ENABLED)) {
1485 kvm_clear_async_pf_completion_queue(vcpu);
1486 kvm_async_pf_hash_reset(vcpu);
1487 return 0;
1488 }
1489
1490 if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa))
1491 return 1;
1492
Gleb Natapov6adba522010-10-14 11:22:55 +02001493 vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS);
Gleb Natapov344d9582010-10-14 11:22:50 +02001494 kvm_async_pf_wakeup_all(vcpu);
1495 return 0;
1496}
1497
Glauber Costa12f9a482011-02-01 14:16:40 -05001498static void kvmclock_reset(struct kvm_vcpu *vcpu)
1499{
1500 if (vcpu->arch.time_page) {
1501 kvm_release_page_dirty(vcpu->arch.time_page);
1502 vcpu->arch.time_page = NULL;
1503 }
1504}
1505
Glauber Costac9aaa892011-07-11 15:28:14 -04001506static void accumulate_steal_time(struct kvm_vcpu *vcpu)
1507{
1508 u64 delta;
1509
1510 if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
1511 return;
1512
1513 delta = current->sched_info.run_delay - vcpu->arch.st.last_steal;
1514 vcpu->arch.st.last_steal = current->sched_info.run_delay;
1515 vcpu->arch.st.accum_steal = delta;
1516}
1517
1518static void record_steal_time(struct kvm_vcpu *vcpu)
1519{
1520 if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
1521 return;
1522
1523 if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime,
1524 &vcpu->arch.st.steal, sizeof(struct kvm_steal_time))))
1525 return;
1526
1527 vcpu->arch.st.steal.steal += vcpu->arch.st.accum_steal;
1528 vcpu->arch.st.steal.version += 2;
1529 vcpu->arch.st.accum_steal = 0;
1530
1531 kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime,
1532 &vcpu->arch.st.steal, sizeof(struct kvm_steal_time));
1533}
1534
Carsten Otte15c4a642007-10-30 18:44:17 +01001535int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1536{
1537 switch (msr) {
Carsten Otte15c4a642007-10-30 18:44:17 +01001538 case MSR_EFER:
Roedel, Joergb69e8ca2010-05-06 11:38:43 +02001539 return set_efer(vcpu, data);
Andre Przywara8f1589d2009-06-24 12:44:33 +02001540 case MSR_K7_HWCR:
1541 data &= ~(u64)0x40; /* ignore flush filter disable */
Joerg Roedel82494022010-02-24 18:59:16 +01001542 data &= ~(u64)0x100; /* ignore ignne emulation enable */
Andre Przywara8f1589d2009-06-24 12:44:33 +02001543 if (data != 0) {
1544 pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",
1545 data);
1546 return 1;
1547 }
Carsten Otte15c4a642007-10-30 18:44:17 +01001548 break;
Andre Przywaraf7c6d142009-07-02 15:04:14 +02001549 case MSR_FAM10H_MMIO_CONF_BASE:
1550 if (data != 0) {
1551 pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: "
1552 "0x%llx\n", data);
1553 return 1;
1554 }
Carsten Otte15c4a642007-10-30 18:44:17 +01001555 break;
Andre Przywarac323c0e2009-06-24 15:37:05 +02001556 case MSR_AMD64_NB_CFG:
Joerg Roedelc7ac6792008-02-11 20:28:27 +01001557 break;
Alexander Grafb5e2fec2008-07-22 08:00:45 +02001558 case MSR_IA32_DEBUGCTLMSR:
1559 if (!data) {
1560 /* We support the non-activated case already */
1561 break;
1562 } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) {
1563 /* Values other than LBR and BTF are vendor-specific,
1564 thus reserved and should throw a #GP */
1565 return 1;
1566 }
1567 pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
1568 __func__, data);
1569 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001570 case MSR_IA32_UCODE_REV:
1571 case MSR_IA32_UCODE_WRITE:
Avi Kivity61a6bd62008-12-29 17:32:28 +02001572 case MSR_VM_HSAVE_PA:
Andre Przywara6098ca92009-07-03 16:00:14 +02001573 case MSR_AMD64_PATCH_LOADER:
Carsten Otte15c4a642007-10-30 18:44:17 +01001574 break;
Avi Kivity9ba075a2008-05-26 20:06:35 +03001575 case 0x200 ... 0x2ff:
1576 return set_msr_mtrr(vcpu, msr, data);
Carsten Otte15c4a642007-10-30 18:44:17 +01001577 case MSR_IA32_APICBASE:
1578 kvm_set_apic_base(vcpu, data);
1579 break;
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001580 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1581 return kvm_x2apic_msr_write(vcpu, msr, data);
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001582 case MSR_IA32_TSCDEADLINE:
1583 kvm_set_lapic_tscdeadline_msr(vcpu, data);
1584 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001585 case MSR_IA32_MISC_ENABLE:
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001586 vcpu->arch.ia32_misc_enable_msr = data;
Carsten Otte15c4a642007-10-30 18:44:17 +01001587 break;
Glauber Costa11c6bff2010-05-11 12:17:41 -04001588 case MSR_KVM_WALL_CLOCK_NEW:
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001589 case MSR_KVM_WALL_CLOCK:
1590 vcpu->kvm->arch.wall_clock = data;
1591 kvm_write_wall_clock(vcpu->kvm, data);
1592 break;
Glauber Costa11c6bff2010-05-11 12:17:41 -04001593 case MSR_KVM_SYSTEM_TIME_NEW:
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001594 case MSR_KVM_SYSTEM_TIME: {
Glauber Costa12f9a482011-02-01 14:16:40 -05001595 kvmclock_reset(vcpu);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001596
1597 vcpu->arch.time = data;
Zachary Amsdenc2855452010-09-18 14:38:15 -10001598 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001599
1600 /* we verify if the enable bit is set... */
1601 if (!(data & 1))
1602 break;
1603
1604 /* ...but clean it before doing the actual write */
1605 vcpu->arch.time_offset = data & ~(PAGE_MASK | 1);
1606
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001607 vcpu->arch.time_page =
1608 gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001609
1610 if (is_error_page(vcpu->arch.time_page)) {
1611 kvm_release_page_clean(vcpu->arch.time_page);
1612 vcpu->arch.time_page = NULL;
1613 }
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001614 break;
1615 }
Gleb Natapov344d9582010-10-14 11:22:50 +02001616 case MSR_KVM_ASYNC_PF_EN:
1617 if (kvm_pv_enable_async_pf(vcpu, data))
1618 return 1;
1619 break;
Glauber Costac9aaa892011-07-11 15:28:14 -04001620 case MSR_KVM_STEAL_TIME:
1621
1622 if (unlikely(!sched_info_on()))
1623 return 1;
1624
1625 if (data & KVM_STEAL_RESERVED_MASK)
1626 return 1;
1627
1628 if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime,
1629 data & KVM_STEAL_VALID_BITS))
1630 return 1;
1631
1632 vcpu->arch.st.msr_val = data;
1633
1634 if (!(data & KVM_MSR_ENABLED))
1635 break;
1636
1637 vcpu->arch.st.last_steal = current->sched_info.run_delay;
1638
1639 preempt_disable();
1640 accumulate_steal_time(vcpu);
1641 preempt_enable();
1642
1643 kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu);
1644
1645 break;
1646
Huang Ying890ca9a2009-05-11 16:48:15 +08001647 case MSR_IA32_MCG_CTL:
1648 case MSR_IA32_MCG_STATUS:
1649 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1650 return set_msr_mce(vcpu, msr, data);
Andre Przywara71db6022009-06-12 22:01:29 +02001651
1652 /* Performance counters are not protected by a CPUID bit,
1653 * so we should check all of them in the generic path for the sake of
1654 * cross vendor migration.
1655 * Writing a zero into the event select MSRs disables them,
1656 * which we perfectly emulate ;-). Any other value should be at least
1657 * reported, some guests depend on them.
1658 */
1659 case MSR_P6_EVNTSEL0:
1660 case MSR_P6_EVNTSEL1:
1661 case MSR_K7_EVNTSEL0:
1662 case MSR_K7_EVNTSEL1:
1663 case MSR_K7_EVNTSEL2:
1664 case MSR_K7_EVNTSEL3:
1665 if (data != 0)
1666 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1667 "0x%x data 0x%llx\n", msr, data);
1668 break;
1669 /* at least RHEL 4 unconditionally writes to the perfctr registers,
1670 * so we ignore writes to make it happy.
1671 */
1672 case MSR_P6_PERFCTR0:
1673 case MSR_P6_PERFCTR1:
1674 case MSR_K7_PERFCTR0:
1675 case MSR_K7_PERFCTR1:
1676 case MSR_K7_PERFCTR2:
1677 case MSR_K7_PERFCTR3:
1678 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1679 "0x%x data 0x%llx\n", msr, data);
1680 break;
Jes Sorensen84e0cef2010-09-01 11:42:04 +02001681 case MSR_K7_CLK_CTL:
1682 /*
1683 * Ignore all writes to this no longer documented MSR.
1684 * Writes are only relevant for old K7 processors,
1685 * all pre-dating SVM, but a recommended workaround from
1686 * AMD for these chips. It is possible to speicify the
1687 * affected processor models on the command line, hence
1688 * the need to ignore the workaround.
1689 */
1690 break;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001691 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1692 if (kvm_hv_msr_partition_wide(msr)) {
1693 int r;
1694 mutex_lock(&vcpu->kvm->lock);
1695 r = set_msr_hyperv_pw(vcpu, msr, data);
1696 mutex_unlock(&vcpu->kvm->lock);
1697 return r;
1698 } else
1699 return set_msr_hyperv(vcpu, msr, data);
1700 break;
john cooper91c9c3e2011-01-21 00:21:00 -05001701 case MSR_IA32_BBL_CR_CTL3:
1702 /* Drop writes to this legacy MSR -- see rdmsr
1703 * counterpart for further detail.
1704 */
1705 pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data);
1706 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001707 default:
Ed Swierkffde22a2009-10-15 15:21:43 -07001708 if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr))
1709 return xen_hvm_config(vcpu, data);
Andre Przywaraed85c062009-06-25 12:36:49 +02001710 if (!ignore_msrs) {
1711 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n",
1712 msr, data);
1713 return 1;
1714 } else {
1715 pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n",
1716 msr, data);
1717 break;
1718 }
Carsten Otte15c4a642007-10-30 18:44:17 +01001719 }
1720 return 0;
1721}
1722EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1723
1724
1725/*
1726 * Reads an msr value (of 'msr_index') into 'pdata'.
1727 * Returns 0 on success, non-0 otherwise.
1728 * Assumes vcpu_load() was already called.
1729 */
1730int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1731{
1732 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
1733}
1734
Avi Kivity9ba075a2008-05-26 20:06:35 +03001735static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1736{
Sheng Yang0bed3b52008-10-09 16:01:54 +08001737 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1738
Avi Kivity9ba075a2008-05-26 20:06:35 +03001739 if (!msr_mtrr_valid(msr))
1740 return 1;
1741
Sheng Yang0bed3b52008-10-09 16:01:54 +08001742 if (msr == MSR_MTRRdefType)
1743 *pdata = vcpu->arch.mtrr_state.def_type +
1744 (vcpu->arch.mtrr_state.enabled << 10);
1745 else if (msr == MSR_MTRRfix64K_00000)
1746 *pdata = p[0];
1747 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1748 *pdata = p[1 + msr - MSR_MTRRfix16K_80000];
1749 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1750 *pdata = p[3 + msr - MSR_MTRRfix4K_C0000];
1751 else if (msr == MSR_IA32_CR_PAT)
1752 *pdata = vcpu->arch.pat;
1753 else { /* Variable MTRRs */
1754 int idx, is_mtrr_mask;
1755 u64 *pt;
1756
1757 idx = (msr - 0x200) / 2;
1758 is_mtrr_mask = msr - 0x200 - 2 * idx;
1759 if (!is_mtrr_mask)
1760 pt =
1761 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1762 else
1763 pt =
1764 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1765 *pdata = *pt;
1766 }
1767
Avi Kivity9ba075a2008-05-26 20:06:35 +03001768 return 0;
1769}
1770
Huang Ying890ca9a2009-05-11 16:48:15 +08001771static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1772{
1773 u64 data;
1774 u64 mcg_cap = vcpu->arch.mcg_cap;
1775 unsigned bank_num = mcg_cap & 0xff;
1776
1777 switch (msr) {
1778 case MSR_IA32_P5_MC_ADDR:
1779 case MSR_IA32_P5_MC_TYPE:
1780 data = 0;
1781 break;
1782 case MSR_IA32_MCG_CAP:
1783 data = vcpu->arch.mcg_cap;
1784 break;
1785 case MSR_IA32_MCG_CTL:
1786 if (!(mcg_cap & MCG_CTL_P))
1787 return 1;
1788 data = vcpu->arch.mcg_ctl;
1789 break;
1790 case MSR_IA32_MCG_STATUS:
1791 data = vcpu->arch.mcg_status;
1792 break;
1793 default:
1794 if (msr >= MSR_IA32_MC0_CTL &&
1795 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1796 u32 offset = msr - MSR_IA32_MC0_CTL;
1797 data = vcpu->arch.mce_banks[offset];
1798 break;
1799 }
1800 return 1;
1801 }
1802 *pdata = data;
1803 return 0;
1804}
1805
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001806static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1807{
1808 u64 data = 0;
1809 struct kvm *kvm = vcpu->kvm;
1810
1811 switch (msr) {
1812 case HV_X64_MSR_GUEST_OS_ID:
1813 data = kvm->arch.hv_guest_os_id;
1814 break;
1815 case HV_X64_MSR_HYPERCALL:
1816 data = kvm->arch.hv_hypercall;
1817 break;
1818 default:
1819 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1820 return 1;
1821 }
1822
1823 *pdata = data;
1824 return 0;
1825}
1826
1827static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1828{
1829 u64 data = 0;
1830
1831 switch (msr) {
1832 case HV_X64_MSR_VP_INDEX: {
1833 int r;
1834 struct kvm_vcpu *v;
1835 kvm_for_each_vcpu(r, v, vcpu->kvm)
1836 if (v == vcpu)
1837 data = r;
1838 break;
1839 }
Gleb Natapov10388a02010-01-17 15:51:23 +02001840 case HV_X64_MSR_EOI:
1841 return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
1842 case HV_X64_MSR_ICR:
1843 return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
1844 case HV_X64_MSR_TPR:
1845 return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
Mike Waychison14fa67e2011-07-21 15:38:10 -07001846 case HV_X64_MSR_APIC_ASSIST_PAGE:
Mike Waychisond1613ad2011-07-23 00:31:45 -07001847 data = vcpu->arch.hv_vapic;
1848 break;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001849 default:
1850 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1851 return 1;
1852 }
1853 *pdata = data;
1854 return 0;
1855}
1856
Carsten Otte15c4a642007-10-30 18:44:17 +01001857int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1858{
1859 u64 data;
1860
1861 switch (msr) {
Carsten Otte15c4a642007-10-30 18:44:17 +01001862 case MSR_IA32_PLATFORM_ID:
Carsten Otte15c4a642007-10-30 18:44:17 +01001863 case MSR_IA32_EBL_CR_POWERON:
Alexander Grafb5e2fec2008-07-22 08:00:45 +02001864 case MSR_IA32_DEBUGCTLMSR:
1865 case MSR_IA32_LASTBRANCHFROMIP:
1866 case MSR_IA32_LASTBRANCHTOIP:
1867 case MSR_IA32_LASTINTFROMIP:
1868 case MSR_IA32_LASTINTTOIP:
Jaswinder Singh Rajput60af2ec2009-05-14 11:00:10 +05301869 case MSR_K8_SYSCFG:
1870 case MSR_K7_HWCR:
Avi Kivity61a6bd62008-12-29 17:32:28 +02001871 case MSR_VM_HSAVE_PA:
Amit Shah1f3ee612009-06-30 16:24:28 +05301872 case MSR_P6_PERFCTR0:
1873 case MSR_P6_PERFCTR1:
Amit Shah7fe29e02009-03-20 12:39:00 +05301874 case MSR_P6_EVNTSEL0:
1875 case MSR_P6_EVNTSEL1:
Amit Shah9e699622009-06-15 13:25:34 +05301876 case MSR_K7_EVNTSEL0:
Amit Shah1f3ee612009-06-30 16:24:28 +05301877 case MSR_K7_PERFCTR0:
Andre Przywara1fdbd482009-06-24 12:44:34 +02001878 case MSR_K8_INT_PENDING_MSG:
Andre Przywarac323c0e2009-06-24 15:37:05 +02001879 case MSR_AMD64_NB_CFG:
Andre Przywaraf7c6d142009-07-02 15:04:14 +02001880 case MSR_FAM10H_MMIO_CONF_BASE:
Carsten Otte15c4a642007-10-30 18:44:17 +01001881 data = 0;
1882 break;
Marcelo Tosatti742bc672011-07-29 19:44:21 -03001883 case MSR_IA32_UCODE_REV:
1884 data = 0x100000000ULL;
1885 break;
Avi Kivity9ba075a2008-05-26 20:06:35 +03001886 case MSR_MTRRcap:
1887 data = 0x500 | KVM_NR_VAR_MTRR;
1888 break;
1889 case 0x200 ... 0x2ff:
1890 return get_msr_mtrr(vcpu, msr, pdata);
Carsten Otte15c4a642007-10-30 18:44:17 +01001891 case 0xcd: /* fsb frequency */
1892 data = 3;
1893 break;
Jes Sorensen7b914092010-09-09 12:06:46 +02001894 /*
1895 * MSR_EBC_FREQUENCY_ID
1896 * Conservative value valid for even the basic CPU models.
1897 * Models 0,1: 000 in bits 23:21 indicating a bus speed of
1898 * 100MHz, model 2 000 in bits 18:16 indicating 100MHz,
1899 * and 266MHz for model 3, or 4. Set Core Clock
1900 * Frequency to System Bus Frequency Ratio to 1 (bits
1901 * 31:24) even though these are only valid for CPU
1902 * models > 2, however guests may end up dividing or
1903 * multiplying by zero otherwise.
1904 */
1905 case MSR_EBC_FREQUENCY_ID:
1906 data = 1 << 24;
1907 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001908 case MSR_IA32_APICBASE:
1909 data = kvm_get_apic_base(vcpu);
1910 break;
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001911 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1912 return kvm_x2apic_msr_read(vcpu, msr, pdata);
1913 break;
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001914 case MSR_IA32_TSCDEADLINE:
1915 data = kvm_get_lapic_tscdeadline_msr(vcpu);
1916 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001917 case MSR_IA32_MISC_ENABLE:
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001918 data = vcpu->arch.ia32_misc_enable_msr;
Carsten Otte15c4a642007-10-30 18:44:17 +01001919 break;
Alexander Graf847f0ad2008-02-21 12:11:01 +01001920 case MSR_IA32_PERF_STATUS:
1921 /* TSC increment by tick */
1922 data = 1000ULL;
1923 /* CPU multiplier */
1924 data |= (((uint64_t)4ULL) << 40);
1925 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001926 case MSR_EFER:
Avi Kivityf6801df2010-01-21 15:31:50 +02001927 data = vcpu->arch.efer;
Carsten Otte15c4a642007-10-30 18:44:17 +01001928 break;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001929 case MSR_KVM_WALL_CLOCK:
Glauber Costa11c6bff2010-05-11 12:17:41 -04001930 case MSR_KVM_WALL_CLOCK_NEW:
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001931 data = vcpu->kvm->arch.wall_clock;
1932 break;
1933 case MSR_KVM_SYSTEM_TIME:
Glauber Costa11c6bff2010-05-11 12:17:41 -04001934 case MSR_KVM_SYSTEM_TIME_NEW:
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001935 data = vcpu->arch.time;
1936 break;
Gleb Natapov344d9582010-10-14 11:22:50 +02001937 case MSR_KVM_ASYNC_PF_EN:
1938 data = vcpu->arch.apf.msr_val;
1939 break;
Glauber Costac9aaa892011-07-11 15:28:14 -04001940 case MSR_KVM_STEAL_TIME:
1941 data = vcpu->arch.st.msr_val;
1942 break;
Huang Ying890ca9a2009-05-11 16:48:15 +08001943 case MSR_IA32_P5_MC_ADDR:
1944 case MSR_IA32_P5_MC_TYPE:
1945 case MSR_IA32_MCG_CAP:
1946 case MSR_IA32_MCG_CTL:
1947 case MSR_IA32_MCG_STATUS:
1948 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1949 return get_msr_mce(vcpu, msr, pdata);
Jes Sorensen84e0cef2010-09-01 11:42:04 +02001950 case MSR_K7_CLK_CTL:
1951 /*
1952 * Provide expected ramp-up count for K7. All other
1953 * are set to zero, indicating minimum divisors for
1954 * every field.
1955 *
1956 * This prevents guest kernels on AMD host with CPU
1957 * type 6, model 8 and higher from exploding due to
1958 * the rdmsr failing.
1959 */
1960 data = 0x20000000;
1961 break;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001962 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1963 if (kvm_hv_msr_partition_wide(msr)) {
1964 int r;
1965 mutex_lock(&vcpu->kvm->lock);
1966 r = get_msr_hyperv_pw(vcpu, msr, pdata);
1967 mutex_unlock(&vcpu->kvm->lock);
1968 return r;
1969 } else
1970 return get_msr_hyperv(vcpu, msr, pdata);
1971 break;
john cooper91c9c3e2011-01-21 00:21:00 -05001972 case MSR_IA32_BBL_CR_CTL3:
1973 /* This legacy MSR exists but isn't fully documented in current
1974 * silicon. It is however accessed by winxp in very narrow
1975 * scenarios where it sets bit #19, itself documented as
1976 * a "reserved" bit. Best effort attempt to source coherent
1977 * read data here should the balance of the register be
1978 * interpreted by the guest:
1979 *
1980 * L2 cache control register 3: 64GB range, 256KB size,
1981 * enabled, latency 0x1, configured
1982 */
1983 data = 0xbe702111;
1984 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001985 default:
Andre Przywaraed85c062009-06-25 12:36:49 +02001986 if (!ignore_msrs) {
1987 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
1988 return 1;
1989 } else {
1990 pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr);
1991 data = 0;
1992 }
1993 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001994 }
1995 *pdata = data;
1996 return 0;
1997}
1998EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1999
Carsten Otte313a3dc2007-10-11 19:16:52 +02002000/*
2001 * Read or write a bunch of msrs. All parameters are kernel addresses.
2002 *
2003 * @return number of msrs set successfully.
2004 */
2005static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
2006 struct kvm_msr_entry *entries,
2007 int (*do_msr)(struct kvm_vcpu *vcpu,
2008 unsigned index, u64 *data))
2009{
Marcelo Tosattif656ce02009-12-23 14:35:25 -02002010 int i, idx;
Carsten Otte313a3dc2007-10-11 19:16:52 +02002011
Marcelo Tosattif656ce02009-12-23 14:35:25 -02002012 idx = srcu_read_lock(&vcpu->kvm->srcu);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002013 for (i = 0; i < msrs->nmsrs; ++i)
2014 if (do_msr(vcpu, entries[i].index, &entries[i].data))
2015 break;
Marcelo Tosattif656ce02009-12-23 14:35:25 -02002016 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002017
Carsten Otte313a3dc2007-10-11 19:16:52 +02002018 return i;
2019}
2020
2021/*
2022 * Read or write a bunch of msrs. Parameters are user addresses.
2023 *
2024 * @return number of msrs set successfully.
2025 */
2026static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
2027 int (*do_msr)(struct kvm_vcpu *vcpu,
2028 unsigned index, u64 *data),
2029 int writeback)
2030{
2031 struct kvm_msrs msrs;
2032 struct kvm_msr_entry *entries;
2033 int r, n;
2034 unsigned size;
2035
2036 r = -EFAULT;
2037 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
2038 goto out;
2039
2040 r = -E2BIG;
2041 if (msrs.nmsrs >= MAX_IO_MSRS)
2042 goto out;
2043
2044 r = -ENOMEM;
2045 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
Avi Kivity7a73c022010-07-22 23:24:52 +03002046 entries = kmalloc(size, GFP_KERNEL);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002047 if (!entries)
2048 goto out;
2049
2050 r = -EFAULT;
2051 if (copy_from_user(entries, user_msrs->entries, size))
2052 goto out_free;
2053
2054 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
2055 if (r < 0)
2056 goto out_free;
2057
2058 r = -EFAULT;
2059 if (writeback && copy_to_user(user_msrs->entries, entries, size))
2060 goto out_free;
2061
2062 r = n;
2063
2064out_free:
Avi Kivity7a73c022010-07-22 23:24:52 +03002065 kfree(entries);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002066out:
2067 return r;
2068}
2069
Zhang Xiantao018d00d2007-11-15 23:07:47 +08002070int kvm_dev_ioctl_check_extension(long ext)
2071{
2072 int r;
2073
2074 switch (ext) {
2075 case KVM_CAP_IRQCHIP:
2076 case KVM_CAP_HLT:
2077 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
Zhang Xiantao018d00d2007-11-15 23:07:47 +08002078 case KVM_CAP_SET_TSS_ADDR:
Dan Kenigsberg07716712007-11-21 17:10:04 +02002079 case KVM_CAP_EXT_CPUID:
Gerd Hoffmannc8076602009-02-04 17:52:04 +01002080 case KVM_CAP_CLOCKSOURCE:
Sheng Yang78376992008-01-28 05:10:22 +08002081 case KVM_CAP_PIT:
Marcelo Tosattia28e4f52008-02-22 12:21:36 -05002082 case KVM_CAP_NOP_IO_DELAY:
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03002083 case KVM_CAP_MP_STATE:
Avi Kivityed848622008-07-29 11:30:57 +03002084 case KVM_CAP_SYNC_MMU:
Lai Jiangshana355c852010-12-14 17:57:47 +08002085 case KVM_CAP_USER_NMI:
Marcelo Tosatti52d939a2008-12-30 15:55:06 -02002086 case KVM_CAP_REINJECT_CONTROL:
Gleb Natapov49256632009-02-04 17:28:14 +02002087 case KVM_CAP_IRQ_INJECT_STATUS:
Sheng Yange56d5322009-03-12 21:45:39 +08002088 case KVM_CAP_ASSIGN_DEV_IRQ:
Gregory Haskins721eecb2009-05-20 10:30:49 -04002089 case KVM_CAP_IRQFD:
Gregory Haskinsd34e6b12009-07-07 17:08:49 -04002090 case KVM_CAP_IOEVENTFD:
Jan Kiszkac5ff41c2009-05-14 22:42:53 +02002091 case KVM_CAP_PIT2:
Beth Kone9f42752009-07-07 11:50:38 -04002092 case KVM_CAP_PIT_STATE2:
Sheng Yangb927a3c2009-07-21 10:42:48 +08002093 case KVM_CAP_SET_IDENTITY_MAP_ADDR:
Ed Swierkffde22a2009-10-15 15:21:43 -07002094 case KVM_CAP_XEN_HVM:
Glauber Costaafbcf7a2009-10-16 15:28:36 -04002095 case KVM_CAP_ADJUST_CLOCK:
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002096 case KVM_CAP_VCPU_EVENTS:
Gleb Natapov55cd8e52010-01-17 15:51:22 +02002097 case KVM_CAP_HYPERV:
Gleb Natapov10388a02010-01-17 15:51:23 +02002098 case KVM_CAP_HYPERV_VAPIC:
Gleb Natapovc25bc162010-01-17 15:51:24 +02002099 case KVM_CAP_HYPERV_SPIN:
Zhai, Edwinab9f4ec2010-01-29 14:38:44 +08002100 case KVM_CAP_PCI_SEGMENT:
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002101 case KVM_CAP_DEBUGREGS:
Jan Kiszkad2be1652010-02-23 17:47:57 +01002102 case KVM_CAP_X86_ROBUST_SINGLESTEP:
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002103 case KVM_CAP_XSAVE:
Gleb Natapov344d9582010-10-14 11:22:50 +02002104 case KVM_CAP_ASYNC_PF:
Joerg Roedel92a1f122011-03-25 09:44:51 +01002105 case KVM_CAP_GET_TSC_KHZ:
Zhang Xiantao018d00d2007-11-15 23:07:47 +08002106 r = 1;
2107 break;
Laurent Vivier542472b2008-05-30 16:05:55 +02002108 case KVM_CAP_COALESCED_MMIO:
2109 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
2110 break;
Avi Kivity774ead32007-12-26 13:57:04 +02002111 case KVM_CAP_VAPIC:
2112 r = !kvm_x86_ops->cpu_has_accelerated_tpr();
2113 break;
Avi Kivityf7252302008-02-20 11:53:16 +02002114 case KVM_CAP_NR_VCPUS:
Sasha Levin8c3ba332011-07-18 17:17:15 +03002115 r = KVM_SOFT_MAX_VCPUS;
2116 break;
2117 case KVM_CAP_MAX_VCPUS:
Avi Kivityf7252302008-02-20 11:53:16 +02002118 r = KVM_MAX_VCPUS;
2119 break;
Avi Kivitya988b912008-02-20 11:59:20 +02002120 case KVM_CAP_NR_MEMSLOTS:
2121 r = KVM_MEMORY_SLOTS;
2122 break;
Marcelo Tosattia68a6a72009-10-01 19:28:39 -03002123 case KVM_CAP_PV_MMU: /* obsolete */
2124 r = 0;
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -05002125 break;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +03002126 case KVM_CAP_IOMMU:
Joerg Roedela1b60c12011-09-06 18:46:34 +02002127 r = iommu_present(&pci_bus_type);
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +03002128 break;
Huang Ying890ca9a2009-05-11 16:48:15 +08002129 case KVM_CAP_MCE:
2130 r = KVM_MAX_MCE_BANKS;
2131 break;
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002132 case KVM_CAP_XCRS:
2133 r = cpu_has_xsave;
2134 break;
Joerg Roedel92a1f122011-03-25 09:44:51 +01002135 case KVM_CAP_TSC_CONTROL:
2136 r = kvm_has_tsc_control;
2137 break;
Zhang Xiantao018d00d2007-11-15 23:07:47 +08002138 default:
2139 r = 0;
2140 break;
2141 }
2142 return r;
2143
2144}
2145
Carsten Otte043405e2007-10-10 17:16:19 +02002146long kvm_arch_dev_ioctl(struct file *filp,
2147 unsigned int ioctl, unsigned long arg)
2148{
2149 void __user *argp = (void __user *)arg;
2150 long r;
2151
2152 switch (ioctl) {
2153 case KVM_GET_MSR_INDEX_LIST: {
2154 struct kvm_msr_list __user *user_msr_list = argp;
2155 struct kvm_msr_list msr_list;
2156 unsigned n;
2157
2158 r = -EFAULT;
2159 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
2160 goto out;
2161 n = msr_list.nmsrs;
2162 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
2163 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
2164 goto out;
2165 r = -E2BIG;
Jan Kiszkae125e7b2009-07-02 21:45:47 +02002166 if (n < msr_list.nmsrs)
Carsten Otte043405e2007-10-10 17:16:19 +02002167 goto out;
2168 r = -EFAULT;
2169 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
2170 num_msrs_to_save * sizeof(u32)))
2171 goto out;
Jan Kiszkae125e7b2009-07-02 21:45:47 +02002172 if (copy_to_user(user_msr_list->indices + num_msrs_to_save,
Carsten Otte043405e2007-10-10 17:16:19 +02002173 &emulated_msrs,
2174 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
2175 goto out;
2176 r = 0;
2177 break;
2178 }
Avi Kivity674eea02008-02-11 18:37:23 +02002179 case KVM_GET_SUPPORTED_CPUID: {
2180 struct kvm_cpuid2 __user *cpuid_arg = argp;
2181 struct kvm_cpuid2 cpuid;
2182
2183 r = -EFAULT;
2184 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2185 goto out;
2186 r = kvm_dev_ioctl_get_supported_cpuid(&cpuid,
Amit Shah19355472009-01-14 16:56:00 +00002187 cpuid_arg->entries);
Avi Kivity674eea02008-02-11 18:37:23 +02002188 if (r)
2189 goto out;
2190
2191 r = -EFAULT;
2192 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
2193 goto out;
2194 r = 0;
2195 break;
2196 }
Huang Ying890ca9a2009-05-11 16:48:15 +08002197 case KVM_X86_GET_MCE_CAP_SUPPORTED: {
2198 u64 mce_cap;
2199
2200 mce_cap = KVM_MCE_CAP_SUPPORTED;
2201 r = -EFAULT;
2202 if (copy_to_user(argp, &mce_cap, sizeof mce_cap))
2203 goto out;
2204 r = 0;
2205 break;
2206 }
Carsten Otte043405e2007-10-10 17:16:19 +02002207 default:
2208 r = -EINVAL;
2209 }
2210out:
2211 return r;
2212}
2213
Sheng Yangf5f48ee2010-06-30 12:25:15 +08002214static void wbinvd_ipi(void *garbage)
2215{
2216 wbinvd();
2217}
2218
2219static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu)
2220{
2221 return vcpu->kvm->arch.iommu_domain &&
2222 !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY);
2223}
2224
Carsten Otte313a3dc2007-10-11 19:16:52 +02002225void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2226{
Sheng Yangf5f48ee2010-06-30 12:25:15 +08002227 /* Address WBINVD may be executed by guest */
2228 if (need_emulate_wbinvd(vcpu)) {
2229 if (kvm_x86_ops->has_wbinvd_exit())
2230 cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask);
2231 else if (vcpu->cpu != -1 && vcpu->cpu != cpu)
2232 smp_call_function_single(vcpu->cpu,
2233 wbinvd_ipi, NULL, 1);
2234 }
2235
Carsten Otte313a3dc2007-10-11 19:16:52 +02002236 kvm_x86_ops->vcpu_load(vcpu, cpu);
Zachary Amsden48434c202010-08-19 22:07:24 -10002237 if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) {
Zachary Amsdene48672f2010-08-19 22:07:23 -10002238 /* Make sure TSC doesn't go backwards */
Joerg Roedel8f6055c2011-03-25 09:44:48 +01002239 s64 tsc_delta;
2240 u64 tsc;
2241
Nadav Har'Eld5c17852011-08-02 15:54:20 +03002242 tsc = kvm_x86_ops->read_l1_tsc(vcpu);
Joerg Roedel8f6055c2011-03-25 09:44:48 +01002243 tsc_delta = !vcpu->arch.last_guest_tsc ? 0 :
2244 tsc - vcpu->arch.last_guest_tsc;
2245
Zachary Amsdene48672f2010-08-19 22:07:23 -10002246 if (tsc_delta < 0)
2247 mark_tsc_unstable("KVM discovered backwards TSC");
Zachary Amsdenc2855452010-09-18 14:38:15 -10002248 if (check_tsc_unstable()) {
Zachary Amsdene48672f2010-08-19 22:07:23 -10002249 kvm_x86_ops->adjust_tsc_offset(vcpu, -tsc_delta);
Zachary Amsdenc2855452010-09-18 14:38:15 -10002250 vcpu->arch.tsc_catchup = 1;
Zachary Amsdenc2855452010-09-18 14:38:15 -10002251 }
Nikola Ciprich1aa8cee2011-03-09 23:36:51 +01002252 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
Zachary Amsdenc2855452010-09-18 14:38:15 -10002253 if (vcpu->cpu != cpu)
2254 kvm_migrate_timers(vcpu);
Zachary Amsdene48672f2010-08-19 22:07:23 -10002255 vcpu->cpu = cpu;
Zachary Amsden6b7d7e72009-10-09 16:26:08 -10002256 }
Glauber Costac9aaa892011-07-11 15:28:14 -04002257
2258 accumulate_steal_time(vcpu);
2259 kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002260}
2261
2262void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
2263{
Avi Kivity02daab22009-12-30 12:40:26 +02002264 kvm_x86_ops->vcpu_put(vcpu);
Avi Kivity1c11e712010-05-03 16:05:44 +03002265 kvm_put_guest_fpu(vcpu);
Nadav Har'Eld5c17852011-08-02 15:54:20 +03002266 vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002267}
2268
Dan Kenigsberg07716712007-11-21 17:10:04 +02002269static int is_efer_nx(void)
Carsten Otte313a3dc2007-10-11 19:16:52 +02002270{
Avi Kivitye286e862009-05-03 18:50:55 +03002271 unsigned long long efer = 0;
Carsten Otte313a3dc2007-10-11 19:16:52 +02002272
Avi Kivitye286e862009-05-03 18:50:55 +03002273 rdmsrl_safe(MSR_EFER, &efer);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002274 return efer & EFER_NX;
2275}
2276
2277static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
2278{
2279 int i;
2280 struct kvm_cpuid_entry2 *e, *entry;
2281
Carsten Otte313a3dc2007-10-11 19:16:52 +02002282 entry = NULL;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002283 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
2284 e = &vcpu->arch.cpuid_entries[i];
Carsten Otte313a3dc2007-10-11 19:16:52 +02002285 if (e->function == 0x80000001) {
2286 entry = e;
2287 break;
2288 }
2289 }
Dan Kenigsberg07716712007-11-21 17:10:04 +02002290 if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) {
Carsten Otte313a3dc2007-10-11 19:16:52 +02002291 entry->edx &= ~(1 << 20);
2292 printk(KERN_INFO "kvm: guest NX capability removed\n");
2293 }
2294}
2295
Dan Kenigsberg07716712007-11-21 17:10:04 +02002296/* when an old userspace process fills a new kernel module */
Carsten Otte313a3dc2007-10-11 19:16:52 +02002297static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
2298 struct kvm_cpuid *cpuid,
2299 struct kvm_cpuid_entry __user *entries)
2300{
Dan Kenigsberg07716712007-11-21 17:10:04 +02002301 int r, i;
2302 struct kvm_cpuid_entry *cpuid_entries;
2303
2304 r = -E2BIG;
2305 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
2306 goto out;
2307 r = -ENOMEM;
2308 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent);
2309 if (!cpuid_entries)
2310 goto out;
2311 r = -EFAULT;
2312 if (copy_from_user(cpuid_entries, entries,
2313 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
2314 goto out_free;
2315 for (i = 0; i < cpuid->nent; i++) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002316 vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function;
2317 vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax;
2318 vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx;
2319 vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx;
2320 vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx;
2321 vcpu->arch.cpuid_entries[i].index = 0;
2322 vcpu->arch.cpuid_entries[i].flags = 0;
2323 vcpu->arch.cpuid_entries[i].padding[0] = 0;
2324 vcpu->arch.cpuid_entries[i].padding[1] = 0;
2325 vcpu->arch.cpuid_entries[i].padding[2] = 0;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002326 }
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002327 vcpu->arch.cpuid_nent = cpuid->nent;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002328 cpuid_fix_nx_cap(vcpu);
2329 r = 0;
Gleb Natapovfc61b802009-07-05 17:39:35 +03002330 kvm_apic_set_version(vcpu);
Sheng Yang0e851882009-12-18 16:48:46 +08002331 kvm_x86_ops->cpuid_update(vcpu);
Dexuan Cui2acf9232010-06-10 11:27:12 +08002332 update_cpuid(vcpu);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002333
2334out_free:
2335 vfree(cpuid_entries);
2336out:
2337 return r;
2338}
2339
2340static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
Amit Shah19355472009-01-14 16:56:00 +00002341 struct kvm_cpuid2 *cpuid,
2342 struct kvm_cpuid_entry2 __user *entries)
Dan Kenigsberg07716712007-11-21 17:10:04 +02002343{
Carsten Otte313a3dc2007-10-11 19:16:52 +02002344 int r;
2345
2346 r = -E2BIG;
2347 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
2348 goto out;
2349 r = -EFAULT;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002350 if (copy_from_user(&vcpu->arch.cpuid_entries, entries,
Dan Kenigsberg07716712007-11-21 17:10:04 +02002351 cpuid->nent * sizeof(struct kvm_cpuid_entry2)))
Carsten Otte313a3dc2007-10-11 19:16:52 +02002352 goto out;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002353 vcpu->arch.cpuid_nent = cpuid->nent;
Gleb Natapovfc61b802009-07-05 17:39:35 +03002354 kvm_apic_set_version(vcpu);
Sheng Yang0e851882009-12-18 16:48:46 +08002355 kvm_x86_ops->cpuid_update(vcpu);
Dexuan Cui2acf9232010-06-10 11:27:12 +08002356 update_cpuid(vcpu);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002357 return 0;
2358
2359out:
2360 return r;
2361}
2362
Dan Kenigsberg07716712007-11-21 17:10:04 +02002363static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
Amit Shah19355472009-01-14 16:56:00 +00002364 struct kvm_cpuid2 *cpuid,
2365 struct kvm_cpuid_entry2 __user *entries)
Dan Kenigsberg07716712007-11-21 17:10:04 +02002366{
2367 int r;
2368
2369 r = -E2BIG;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002370 if (cpuid->nent < vcpu->arch.cpuid_nent)
Dan Kenigsberg07716712007-11-21 17:10:04 +02002371 goto out;
2372 r = -EFAULT;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002373 if (copy_to_user(entries, &vcpu->arch.cpuid_entries,
Amit Shah19355472009-01-14 16:56:00 +00002374 vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2)))
Dan Kenigsberg07716712007-11-21 17:10:04 +02002375 goto out;
2376 return 0;
2377
2378out:
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002379 cpuid->nent = vcpu->arch.cpuid_nent;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002380 return r;
2381}
2382
Avi Kivity945ee352010-11-09 16:15:43 +02002383static void cpuid_mask(u32 *word, int wordnum)
2384{
2385 *word &= boot_cpu_data.x86_capability[wordnum];
2386}
2387
Dan Kenigsberg07716712007-11-21 17:10:04 +02002388static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
Amit Shah19355472009-01-14 16:56:00 +00002389 u32 index)
Dan Kenigsberg07716712007-11-21 17:10:04 +02002390{
2391 entry->function = function;
2392 entry->index = index;
2393 cpuid_count(entry->function, entry->index,
Amit Shah19355472009-01-14 16:56:00 +00002394 &entry->eax, &entry->ebx, &entry->ecx, &entry->edx);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002395 entry->flags = 0;
2396}
2397
Avi Kivity24c82e52011-05-18 05:56:07 -04002398static bool supported_xcr0_bit(unsigned bit)
2399{
2400 u64 mask = ((u64)1 << bit);
2401
2402 return mask & (XSTATE_FP | XSTATE_SSE | XSTATE_YMM) & host_xcr0;
2403}
2404
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002405#define F(x) bit(X86_FEATURE_##x)
2406
Dan Kenigsberg07716712007-11-21 17:10:04 +02002407static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
2408 u32 index, int *nent, int maxnent)
2409{
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002410 unsigned f_nx = is_efer_nx() ? F(NX) : 0;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002411#ifdef CONFIG_X86_64
Sheng Yang17cc3932010-01-05 19:02:27 +08002412 unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL)
2413 ? F(GBPAGES) : 0;
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002414 unsigned f_lm = F(LM);
2415#else
Sheng Yang17cc3932010-01-05 19:02:27 +08002416 unsigned f_gbpages = 0;
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002417 unsigned f_lm = 0;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002418#endif
Sheng Yang4e47c7a2009-12-18 16:48:47 +08002419 unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0;
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002420
2421 /* cpuid 1.edx */
2422 const u32 kvm_supported_word0_x86_features =
2423 F(FPU) | F(VME) | F(DE) | F(PSE) |
2424 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
2425 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) |
2426 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
2427 F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) |
2428 0 /* Reserved, DS, ACPI */ | F(MMX) |
2429 F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) |
2430 0 /* HTT, TM, Reserved, PBE */;
2431 /* cpuid 0x80000001.edx */
2432 const u32 kvm_supported_word1_x86_features =
2433 F(FPU) | F(VME) | F(DE) | F(PSE) |
2434 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
2435 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) |
2436 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
2437 F(PAT) | F(PSE36) | 0 /* Reserved */ |
2438 f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) |
Sheng Yang4e47c7a2009-12-18 16:48:47 +08002439 F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp |
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002440 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW);
2441 /* cpuid 1.ecx */
2442 const u32 kvm_supported_word4_x86_features =
Sheng Yang6c3f6042010-06-22 13:49:21 +08002443 F(XMM3) | F(PCLMULQDQ) | 0 /* DTES64, MONITOR */ |
Avi Kivityd149c732009-05-10 14:41:56 +03002444 0 /* DS-CPL, VMX, SMX, EST */ |
2445 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
2446 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ |
2447 0 /* Reserved, DCA */ | F(XMM4_1) |
Gleb Natapov0105d1a2009-07-05 17:39:36 +03002448 F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) |
Andre Przywara6d886fd2010-09-06 15:14:19 +02002449 0 /* Reserved*/ | F(AES) | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX) |
Yang, Wei Y4a00efd2011-06-13 21:52:33 +08002450 F(F16C) | F(RDRAND);
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002451 /* cpuid 0x80000001.ecx */
Dan Kenigsberg07716712007-11-21 17:10:04 +02002452 const u32 kvm_supported_word6_x86_features =
Joerg Roedel4c62a2d2010-09-10 17:31:06 +02002453 F(LAHF_LM) | F(CMP_LEGACY) | 0 /*SVM*/ | 0 /* ExtApicSpace */ |
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002454 F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) |
Andre Przywara7ef8aa72010-09-06 15:14:17 +02002455 F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(XOP) |
Andre Przywara6d886fd2010-09-06 15:14:19 +02002456 0 /* SKINIT, WDT, LWP */ | F(FMA4) | F(TBM);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002457
BrillyWu@viatech.com.cn4429d5d2011-04-25 13:55:15 +08002458 /* cpuid 0xC0000001.edx */
2459 const u32 kvm_supported_word5_x86_features =
2460 F(XSTORE) | F(XSTORE_EN) | F(XCRYPT) | F(XCRYPT_EN) |
2461 F(ACE2) | F(ACE2_EN) | F(PHE) | F(PHE_EN) |
2462 F(PMM) | F(PMM_EN);
2463
Yang, Wei Y611c1202011-06-03 11:14:03 +08002464 /* cpuid 7.0.ebx */
2465 const u32 kvm_supported_word9_x86_features =
Yang, Weia01c8f92011-06-14 15:19:06 +08002466 F(SMEP) | F(FSGSBASE) | F(ERMS);
Yang, Wei Y611c1202011-06-03 11:14:03 +08002467
Amit Shah19355472009-01-14 16:56:00 +00002468 /* all calls to cpuid_count() should be made on the same cpu */
Dan Kenigsberg07716712007-11-21 17:10:04 +02002469 get_cpu();
2470 do_cpuid_1_ent(entry, function, index);
2471 ++*nent;
2472
2473 switch (function) {
2474 case 0:
Dexuan Cui2acf9232010-06-10 11:27:12 +08002475 entry->eax = min(entry->eax, (u32)0xd);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002476 break;
2477 case 1:
2478 entry->edx &= kvm_supported_word0_x86_features;
Avi Kivity945ee352010-11-09 16:15:43 +02002479 cpuid_mask(&entry->edx, 0);
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002480 entry->ecx &= kvm_supported_word4_x86_features;
Avi Kivity945ee352010-11-09 16:15:43 +02002481 cpuid_mask(&entry->ecx, 4);
Gleb Natapov0d1de2d2009-07-12 16:10:55 +03002482 /* we support x2apic emulation even if host does not support
2483 * it since we emulate x2apic in software */
2484 entry->ecx |= F(X2APIC);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002485 break;
2486 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
2487 * may return different values. This forces us to get_cpu() before
2488 * issuing the first command, and also to emulate this annoying behavior
2489 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
2490 case 2: {
2491 int t, times = entry->eax & 0xff;
2492
2493 entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
Nitin A Kamble0fdf8e52008-11-05 15:56:21 -08002494 entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002495 for (t = 1; t < times && *nent < maxnent; ++t) {
2496 do_cpuid_1_ent(&entry[t], function, 0);
2497 entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
2498 ++*nent;
2499 }
2500 break;
2501 }
Yang, Wei Y611c1202011-06-03 11:14:03 +08002502 /* function 4 has additional index. */
Dan Kenigsberg07716712007-11-21 17:10:04 +02002503 case 4: {
Harvey Harrison14af3f32008-02-19 10:25:50 -08002504 int i, cache_type;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002505
2506 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2507 /* read more entries until cache_type is zero */
Harvey Harrison14af3f32008-02-19 10:25:50 -08002508 for (i = 1; *nent < maxnent; ++i) {
2509 cache_type = entry[i - 1].eax & 0x1f;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002510 if (!cache_type)
2511 break;
Harvey Harrison14af3f32008-02-19 10:25:50 -08002512 do_cpuid_1_ent(&entry[i], function, i);
2513 entry[i].flags |=
Dan Kenigsberg07716712007-11-21 17:10:04 +02002514 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2515 ++*nent;
2516 }
2517 break;
2518 }
Yang, Wei Y611c1202011-06-03 11:14:03 +08002519 case 7: {
2520 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2521 /* Mask ebx against host capbability word 9 */
2522 if (index == 0) {
2523 entry->ebx &= kvm_supported_word9_x86_features;
2524 cpuid_mask(&entry->ebx, 9);
2525 } else
2526 entry->ebx = 0;
2527 entry->eax = 0;
2528 entry->ecx = 0;
2529 entry->edx = 0;
2530 break;
2531 }
Avi Kivity24c82e52011-05-18 05:56:07 -04002532 case 9:
2533 break;
Yang, Wei Y611c1202011-06-03 11:14:03 +08002534 /* function 0xb has additional index. */
Dan Kenigsberg07716712007-11-21 17:10:04 +02002535 case 0xb: {
Harvey Harrison14af3f32008-02-19 10:25:50 -08002536 int i, level_type;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002537
2538 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2539 /* read more entries until level_type is zero */
Harvey Harrison14af3f32008-02-19 10:25:50 -08002540 for (i = 1; *nent < maxnent; ++i) {
Nitin A Kamble0853d2c2008-11-05 15:37:36 -08002541 level_type = entry[i - 1].ecx & 0xff00;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002542 if (!level_type)
2543 break;
Harvey Harrison14af3f32008-02-19 10:25:50 -08002544 do_cpuid_1_ent(&entry[i], function, i);
2545 entry[i].flags |=
Dan Kenigsberg07716712007-11-21 17:10:04 +02002546 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2547 ++*nent;
2548 }
2549 break;
2550 }
Dexuan Cui2acf9232010-06-10 11:27:12 +08002551 case 0xd: {
Andre Przywara02668b062011-06-10 11:35:30 +02002552 int idx, i;
Dexuan Cui2acf9232010-06-10 11:27:12 +08002553
2554 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
Andre Przywara02668b062011-06-10 11:35:30 +02002555 for (idx = 1, i = 1; *nent < maxnent && idx < 64; ++idx) {
2556 do_cpuid_1_ent(&entry[i], function, idx);
2557 if (entry[i].eax == 0 || !supported_xcr0_bit(idx))
Andre Przywara20800bc2011-03-30 15:01:45 +02002558 continue;
Dexuan Cui2acf9232010-06-10 11:27:12 +08002559 entry[i].flags |=
2560 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2561 ++*nent;
Andre Przywara02668b062011-06-10 11:35:30 +02002562 ++i;
Dexuan Cui2acf9232010-06-10 11:27:12 +08002563 }
2564 break;
2565 }
Glauber Costa84478c82010-05-11 12:17:43 -04002566 case KVM_CPUID_SIGNATURE: {
2567 char signature[12] = "KVMKVMKVM\0\0";
2568 u32 *sigptr = (u32 *)signature;
2569 entry->eax = 0;
2570 entry->ebx = sigptr[0];
2571 entry->ecx = sigptr[1];
2572 entry->edx = sigptr[2];
2573 break;
2574 }
2575 case KVM_CPUID_FEATURES:
2576 entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) |
2577 (1 << KVM_FEATURE_NOP_IO_DELAY) |
Glauber Costa371bcf62010-05-11 12:17:46 -04002578 (1 << KVM_FEATURE_CLOCKSOURCE2) |
Glauber Costa32918922011-03-23 13:40:42 -03002579 (1 << KVM_FEATURE_ASYNC_PF) |
Glauber Costa371bcf62010-05-11 12:17:46 -04002580 (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT);
Glauber Costac9aaa892011-07-11 15:28:14 -04002581
2582 if (sched_info_on())
2583 entry->eax |= (1 << KVM_FEATURE_STEAL_TIME);
2584
Glauber Costa84478c82010-05-11 12:17:43 -04002585 entry->ebx = 0;
2586 entry->ecx = 0;
2587 entry->edx = 0;
2588 break;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002589 case 0x80000000:
2590 entry->eax = min(entry->eax, 0x8000001a);
2591 break;
2592 case 0x80000001:
2593 entry->edx &= kvm_supported_word1_x86_features;
Avi Kivity945ee352010-11-09 16:15:43 +02002594 cpuid_mask(&entry->edx, 1);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002595 entry->ecx &= kvm_supported_word6_x86_features;
Avi Kivity945ee352010-11-09 16:15:43 +02002596 cpuid_mask(&entry->ecx, 6);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002597 break;
Avi Kivity24c82e52011-05-18 05:56:07 -04002598 case 0x80000008: {
2599 unsigned g_phys_as = (entry->eax >> 16) & 0xff;
2600 unsigned virt_as = max((entry->eax >> 8) & 0xff, 48U);
2601 unsigned phys_as = entry->eax & 0xff;
2602
2603 if (!g_phys_as)
2604 g_phys_as = phys_as;
2605 entry->eax = g_phys_as | (virt_as << 8);
2606 entry->ebx = entry->edx = 0;
2607 break;
2608 }
2609 case 0x80000019:
2610 entry->ecx = entry->edx = 0;
2611 break;
2612 case 0x8000001a:
2613 break;
2614 case 0x8000001d:
2615 break;
BrillyWu@viatech.com.cn4429d5d2011-04-25 13:55:15 +08002616 /*Add support for Centaur's CPUID instruction*/
2617 case 0xC0000000:
2618 /*Just support up to 0xC0000004 now*/
2619 entry->eax = min(entry->eax, 0xC0000004);
2620 break;
2621 case 0xC0000001:
2622 entry->edx &= kvm_supported_word5_x86_features;
2623 cpuid_mask(&entry->edx, 5);
2624 break;
Avi Kivity24c82e52011-05-18 05:56:07 -04002625 case 3: /* Processor serial number */
2626 case 5: /* MONITOR/MWAIT */
2627 case 6: /* Thermal management */
2628 case 0xA: /* Architectural Performance Monitoring */
2629 case 0x80000007: /* Advanced power management */
BrillyWu@viatech.com.cn4429d5d2011-04-25 13:55:15 +08002630 case 0xC0000002:
2631 case 0xC0000003:
2632 case 0xC0000004:
Avi Kivity24c82e52011-05-18 05:56:07 -04002633 default:
2634 entry->eax = entry->ebx = entry->ecx = entry->edx = 0;
BrillyWu@viatech.com.cn4429d5d2011-04-25 13:55:15 +08002635 break;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002636 }
Joerg Roedeld4330ef2010-04-22 12:33:11 +02002637
2638 kvm_x86_ops->set_supported_cpuid(function, entry);
2639
Dan Kenigsberg07716712007-11-21 17:10:04 +02002640 put_cpu();
2641}
2642
Avi Kivity7faa4ee2009-05-10 13:55:35 +03002643#undef F
2644
Avi Kivity674eea02008-02-11 18:37:23 +02002645static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
Amit Shah19355472009-01-14 16:56:00 +00002646 struct kvm_cpuid_entry2 __user *entries)
Dan Kenigsberg07716712007-11-21 17:10:04 +02002647{
2648 struct kvm_cpuid_entry2 *cpuid_entries;
2649 int limit, nent = 0, r = -E2BIG;
2650 u32 func;
2651
2652 if (cpuid->nent < 1)
2653 goto out;
Avi Kivity6a544352009-10-04 16:45:13 +02002654 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
2655 cpuid->nent = KVM_MAX_CPUID_ENTRIES;
Dan Kenigsberg07716712007-11-21 17:10:04 +02002656 r = -ENOMEM;
2657 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent);
2658 if (!cpuid_entries)
2659 goto out;
2660
2661 do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent);
2662 limit = cpuid_entries[0].eax;
2663 for (func = 1; func <= limit && nent < cpuid->nent; ++func)
2664 do_cpuid_ent(&cpuid_entries[nent], func, 0,
Amit Shah19355472009-01-14 16:56:00 +00002665 &nent, cpuid->nent);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002666 r = -E2BIG;
2667 if (nent >= cpuid->nent)
2668 goto out_free;
2669
2670 do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent);
2671 limit = cpuid_entries[nent - 1].eax;
2672 for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func)
2673 do_cpuid_ent(&cpuid_entries[nent], func, 0,
Amit Shah19355472009-01-14 16:56:00 +00002674 &nent, cpuid->nent);
Glauber Costa84478c82010-05-11 12:17:43 -04002675
2676
2677
2678 r = -E2BIG;
2679 if (nent >= cpuid->nent)
2680 goto out_free;
2681
BrillyWu@viatech.com.cn4429d5d2011-04-25 13:55:15 +08002682 /* Add support for Centaur's CPUID instruction. */
2683 if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR) {
2684 do_cpuid_ent(&cpuid_entries[nent], 0xC0000000, 0,
2685 &nent, cpuid->nent);
2686
2687 r = -E2BIG;
2688 if (nent >= cpuid->nent)
2689 goto out_free;
2690
2691 limit = cpuid_entries[nent - 1].eax;
2692 for (func = 0xC0000001;
2693 func <= limit && nent < cpuid->nent; ++func)
2694 do_cpuid_ent(&cpuid_entries[nent], func, 0,
2695 &nent, cpuid->nent);
2696
2697 r = -E2BIG;
2698 if (nent >= cpuid->nent)
2699 goto out_free;
2700 }
2701
Glauber Costa84478c82010-05-11 12:17:43 -04002702 do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent,
2703 cpuid->nent);
2704
2705 r = -E2BIG;
2706 if (nent >= cpuid->nent)
2707 goto out_free;
2708
2709 do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_FEATURES, 0, &nent,
2710 cpuid->nent);
2711
Mark McLoughlincb007642009-05-12 12:36:44 +01002712 r = -E2BIG;
2713 if (nent >= cpuid->nent)
2714 goto out_free;
2715
Dan Kenigsberg07716712007-11-21 17:10:04 +02002716 r = -EFAULT;
2717 if (copy_to_user(entries, cpuid_entries,
Amit Shah19355472009-01-14 16:56:00 +00002718 nent * sizeof(struct kvm_cpuid_entry2)))
Dan Kenigsberg07716712007-11-21 17:10:04 +02002719 goto out_free;
2720 cpuid->nent = nent;
2721 r = 0;
2722
2723out_free:
2724 vfree(cpuid_entries);
2725out:
2726 return r;
2727}
2728
Carsten Otte313a3dc2007-10-11 19:16:52 +02002729static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
2730 struct kvm_lapic_state *s)
2731{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002732 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002733
2734 return 0;
2735}
2736
2737static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2738 struct kvm_lapic_state *s)
2739{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002740 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002741 kvm_apic_post_state_restore(vcpu);
Gleb Natapovcb142eb2009-08-09 15:17:40 +03002742 update_cr8_intercept(vcpu);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002743
2744 return 0;
2745}
2746
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002747static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2748 struct kvm_interrupt *irq)
2749{
2750 if (irq->irq < 0 || irq->irq >= 256)
2751 return -EINVAL;
2752 if (irqchip_in_kernel(vcpu->kvm))
2753 return -ENXIO;
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002754
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002755 kvm_queue_interrupt(vcpu, irq->irq, false);
Avi Kivity3842d132010-07-27 12:30:24 +03002756 kvm_make_request(KVM_REQ_EVENT, vcpu);
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002757
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002758 return 0;
2759}
2760
Jan Kiszkac4abb7c2008-09-26 09:30:55 +02002761static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu)
2762{
Jan Kiszkac4abb7c2008-09-26 09:30:55 +02002763 kvm_inject_nmi(vcpu);
Jan Kiszkac4abb7c2008-09-26 09:30:55 +02002764
2765 return 0;
2766}
2767
Avi Kivityb209749f2007-10-22 16:50:39 +02002768static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu,
2769 struct kvm_tpr_access_ctl *tac)
2770{
2771 if (tac->flags)
2772 return -EINVAL;
2773 vcpu->arch.tpr_access_reporting = !!tac->enabled;
2774 return 0;
2775}
2776
Huang Ying890ca9a2009-05-11 16:48:15 +08002777static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu,
2778 u64 mcg_cap)
2779{
2780 int r;
2781 unsigned bank_num = mcg_cap & 0xff, bank;
2782
2783 r = -EINVAL;
Jan Kiszkaa9e38c3e2009-10-23 09:37:00 +02002784 if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS)
Huang Ying890ca9a2009-05-11 16:48:15 +08002785 goto out;
2786 if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000))
2787 goto out;
2788 r = 0;
2789 vcpu->arch.mcg_cap = mcg_cap;
2790 /* Init IA32_MCG_CTL to all 1s */
2791 if (mcg_cap & MCG_CTL_P)
2792 vcpu->arch.mcg_ctl = ~(u64)0;
2793 /* Init IA32_MCi_CTL to all 1s */
2794 for (bank = 0; bank < bank_num; bank++)
2795 vcpu->arch.mce_banks[bank*4] = ~(u64)0;
2796out:
2797 return r;
2798}
2799
2800static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu,
2801 struct kvm_x86_mce *mce)
2802{
2803 u64 mcg_cap = vcpu->arch.mcg_cap;
2804 unsigned bank_num = mcg_cap & 0xff;
2805 u64 *banks = vcpu->arch.mce_banks;
2806
2807 if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL))
2808 return -EINVAL;
2809 /*
2810 * if IA32_MCG_CTL is not all 1s, the uncorrected error
2811 * reporting is disabled
2812 */
2813 if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) &&
2814 vcpu->arch.mcg_ctl != ~(u64)0)
2815 return 0;
2816 banks += 4 * mce->bank;
2817 /*
2818 * if IA32_MCi_CTL is not all 1s, the uncorrected error
2819 * reporting is disabled for the bank
2820 */
2821 if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0)
2822 return 0;
2823 if (mce->status & MCI_STATUS_UC) {
2824 if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) ||
Avi Kivityfc78f512009-12-07 12:16:48 +02002825 !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) {
Avi Kivitya8eeb042010-05-10 12:34:53 +03002826 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Huang Ying890ca9a2009-05-11 16:48:15 +08002827 return 0;
2828 }
2829 if (banks[1] & MCI_STATUS_VAL)
2830 mce->status |= MCI_STATUS_OVER;
2831 banks[2] = mce->addr;
2832 banks[3] = mce->misc;
2833 vcpu->arch.mcg_status = mce->mcg_status;
2834 banks[1] = mce->status;
2835 kvm_queue_exception(vcpu, MC_VECTOR);
2836 } else if (!(banks[1] & MCI_STATUS_VAL)
2837 || !(banks[1] & MCI_STATUS_UC)) {
2838 if (banks[1] & MCI_STATUS_VAL)
2839 mce->status |= MCI_STATUS_OVER;
2840 banks[2] = mce->addr;
2841 banks[3] = mce->misc;
2842 banks[1] = mce->status;
2843 } else
2844 banks[1] |= MCI_STATUS_OVER;
2845 return 0;
2846}
2847
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002848static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
2849 struct kvm_vcpu_events *events)
2850{
Avi Kivity7460fb4a2011-09-20 13:43:14 +03002851 process_nmi(vcpu);
Jan Kiszka03b82a32010-02-15 10:45:41 +01002852 events->exception.injected =
2853 vcpu->arch.exception.pending &&
2854 !kvm_exception_is_soft(vcpu->arch.exception.nr);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002855 events->exception.nr = vcpu->arch.exception.nr;
2856 events->exception.has_error_code = vcpu->arch.exception.has_error_code;
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04002857 events->exception.pad = 0;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002858 events->exception.error_code = vcpu->arch.exception.error_code;
2859
Jan Kiszka03b82a32010-02-15 10:45:41 +01002860 events->interrupt.injected =
2861 vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002862 events->interrupt.nr = vcpu->arch.interrupt.nr;
Jan Kiszka03b82a32010-02-15 10:45:41 +01002863 events->interrupt.soft = 0;
Jan Kiszka48005f62010-02-19 19:38:07 +01002864 events->interrupt.shadow =
2865 kvm_x86_ops->get_interrupt_shadow(vcpu,
2866 KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002867
2868 events->nmi.injected = vcpu->arch.nmi_injected;
Avi Kivity7460fb4a2011-09-20 13:43:14 +03002869 events->nmi.pending = vcpu->arch.nmi_pending != 0;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002870 events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu);
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04002871 events->nmi.pad = 0;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002872
2873 events->sipi_vector = vcpu->arch.sipi_vector;
2874
Jan Kiszkadab4b912009-12-06 18:24:15 +01002875 events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING
Jan Kiszka48005f62010-02-19 19:38:07 +01002876 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2877 | KVM_VCPUEVENT_VALID_SHADOW);
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04002878 memset(&events->reserved, 0, sizeof(events->reserved));
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002879}
2880
2881static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
2882 struct kvm_vcpu_events *events)
2883{
Jan Kiszkadab4b912009-12-06 18:24:15 +01002884 if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING
Jan Kiszka48005f62010-02-19 19:38:07 +01002885 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2886 | KVM_VCPUEVENT_VALID_SHADOW))
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002887 return -EINVAL;
2888
Avi Kivity7460fb4a2011-09-20 13:43:14 +03002889 process_nmi(vcpu);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002890 vcpu->arch.exception.pending = events->exception.injected;
2891 vcpu->arch.exception.nr = events->exception.nr;
2892 vcpu->arch.exception.has_error_code = events->exception.has_error_code;
2893 vcpu->arch.exception.error_code = events->exception.error_code;
2894
2895 vcpu->arch.interrupt.pending = events->interrupt.injected;
2896 vcpu->arch.interrupt.nr = events->interrupt.nr;
2897 vcpu->arch.interrupt.soft = events->interrupt.soft;
Jan Kiszka48005f62010-02-19 19:38:07 +01002898 if (events->flags & KVM_VCPUEVENT_VALID_SHADOW)
2899 kvm_x86_ops->set_interrupt_shadow(vcpu,
2900 events->interrupt.shadow);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002901
2902 vcpu->arch.nmi_injected = events->nmi.injected;
Jan Kiszkadab4b912009-12-06 18:24:15 +01002903 if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING)
2904 vcpu->arch.nmi_pending = events->nmi.pending;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002905 kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked);
2906
Jan Kiszkadab4b912009-12-06 18:24:15 +01002907 if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR)
2908 vcpu->arch.sipi_vector = events->sipi_vector;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002909
Avi Kivity3842d132010-07-27 12:30:24 +03002910 kvm_make_request(KVM_REQ_EVENT, vcpu);
2911
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002912 return 0;
2913}
2914
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002915static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu,
2916 struct kvm_debugregs *dbgregs)
2917{
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002918 memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db));
2919 dbgregs->dr6 = vcpu->arch.dr6;
2920 dbgregs->dr7 = vcpu->arch.dr7;
2921 dbgregs->flags = 0;
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04002922 memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved));
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002923}
2924
2925static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
2926 struct kvm_debugregs *dbgregs)
2927{
2928 if (dbgregs->flags)
2929 return -EINVAL;
2930
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002931 memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db));
2932 vcpu->arch.dr6 = dbgregs->dr6;
2933 vcpu->arch.dr7 = dbgregs->dr7;
2934
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002935 return 0;
2936}
2937
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002938static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu,
2939 struct kvm_xsave *guest_xsave)
2940{
2941 if (cpu_has_xsave)
2942 memcpy(guest_xsave->region,
2943 &vcpu->arch.guest_fpu.state->xsave,
Xiaotian Fengf45755b2010-08-13 15:19:11 +08002944 xstate_size);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002945 else {
2946 memcpy(guest_xsave->region,
2947 &vcpu->arch.guest_fpu.state->fxsave,
2948 sizeof(struct i387_fxsave_struct));
2949 *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] =
2950 XSTATE_FPSSE;
2951 }
2952}
2953
2954static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu,
2955 struct kvm_xsave *guest_xsave)
2956{
2957 u64 xstate_bv =
2958 *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)];
2959
2960 if (cpu_has_xsave)
2961 memcpy(&vcpu->arch.guest_fpu.state->xsave,
Xiaotian Fengf45755b2010-08-13 15:19:11 +08002962 guest_xsave->region, xstate_size);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002963 else {
2964 if (xstate_bv & ~XSTATE_FPSSE)
2965 return -EINVAL;
2966 memcpy(&vcpu->arch.guest_fpu.state->fxsave,
2967 guest_xsave->region, sizeof(struct i387_fxsave_struct));
2968 }
2969 return 0;
2970}
2971
2972static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu,
2973 struct kvm_xcrs *guest_xcrs)
2974{
2975 if (!cpu_has_xsave) {
2976 guest_xcrs->nr_xcrs = 0;
2977 return;
2978 }
2979
2980 guest_xcrs->nr_xcrs = 1;
2981 guest_xcrs->flags = 0;
2982 guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK;
2983 guest_xcrs->xcrs[0].value = vcpu->arch.xcr0;
2984}
2985
2986static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu,
2987 struct kvm_xcrs *guest_xcrs)
2988{
2989 int i, r = 0;
2990
2991 if (!cpu_has_xsave)
2992 return -EINVAL;
2993
2994 if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags)
2995 return -EINVAL;
2996
2997 for (i = 0; i < guest_xcrs->nr_xcrs; i++)
2998 /* Only support XCR0 currently */
2999 if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) {
3000 r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK,
3001 guest_xcrs->xcrs[0].value);
3002 break;
3003 }
3004 if (r)
3005 r = -EINVAL;
3006 return r;
3007}
3008
Carsten Otte313a3dc2007-10-11 19:16:52 +02003009long kvm_arch_vcpu_ioctl(struct file *filp,
3010 unsigned int ioctl, unsigned long arg)
3011{
3012 struct kvm_vcpu *vcpu = filp->private_data;
3013 void __user *argp = (void __user *)arg;
3014 int r;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003015 union {
3016 struct kvm_lapic_state *lapic;
3017 struct kvm_xsave *xsave;
3018 struct kvm_xcrs *xcrs;
3019 void *buffer;
3020 } u;
Carsten Otte313a3dc2007-10-11 19:16:52 +02003021
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003022 u.buffer = NULL;
Carsten Otte313a3dc2007-10-11 19:16:52 +02003023 switch (ioctl) {
3024 case KVM_GET_LAPIC: {
Marcelo Tosatti2204ae32009-10-29 13:44:16 -02003025 r = -EINVAL;
3026 if (!vcpu->arch.apic)
3027 goto out;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003028 u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
Carsten Otte313a3dc2007-10-11 19:16:52 +02003029
Dave Hansenb772ff32008-08-11 10:01:47 -07003030 r = -ENOMEM;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003031 if (!u.lapic)
Dave Hansenb772ff32008-08-11 10:01:47 -07003032 goto out;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003033 r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic);
Carsten Otte313a3dc2007-10-11 19:16:52 +02003034 if (r)
3035 goto out;
3036 r = -EFAULT;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003037 if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state)))
Carsten Otte313a3dc2007-10-11 19:16:52 +02003038 goto out;
3039 r = 0;
3040 break;
3041 }
3042 case KVM_SET_LAPIC: {
Marcelo Tosatti2204ae32009-10-29 13:44:16 -02003043 r = -EINVAL;
3044 if (!vcpu->arch.apic)
3045 goto out;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003046 u.lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
Dave Hansenb772ff32008-08-11 10:01:47 -07003047 r = -ENOMEM;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003048 if (!u.lapic)
Carsten Otte313a3dc2007-10-11 19:16:52 +02003049 goto out;
Dave Hansenb772ff32008-08-11 10:01:47 -07003050 r = -EFAULT;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003051 if (copy_from_user(u.lapic, argp, sizeof(struct kvm_lapic_state)))
Dave Hansenb772ff32008-08-11 10:01:47 -07003052 goto out;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003053 r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic);
Carsten Otte313a3dc2007-10-11 19:16:52 +02003054 if (r)
3055 goto out;
3056 r = 0;
3057 break;
3058 }
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08003059 case KVM_INTERRUPT: {
3060 struct kvm_interrupt irq;
3061
3062 r = -EFAULT;
3063 if (copy_from_user(&irq, argp, sizeof irq))
3064 goto out;
3065 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
3066 if (r)
3067 goto out;
3068 r = 0;
3069 break;
3070 }
Jan Kiszkac4abb7c2008-09-26 09:30:55 +02003071 case KVM_NMI: {
3072 r = kvm_vcpu_ioctl_nmi(vcpu);
3073 if (r)
3074 goto out;
3075 r = 0;
3076 break;
3077 }
Carsten Otte313a3dc2007-10-11 19:16:52 +02003078 case KVM_SET_CPUID: {
3079 struct kvm_cpuid __user *cpuid_arg = argp;
3080 struct kvm_cpuid cpuid;
3081
3082 r = -EFAULT;
3083 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
3084 goto out;
3085 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
3086 if (r)
3087 goto out;
3088 break;
3089 }
Dan Kenigsberg07716712007-11-21 17:10:04 +02003090 case KVM_SET_CPUID2: {
3091 struct kvm_cpuid2 __user *cpuid_arg = argp;
3092 struct kvm_cpuid2 cpuid;
3093
3094 r = -EFAULT;
3095 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
3096 goto out;
3097 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
Amit Shah19355472009-01-14 16:56:00 +00003098 cpuid_arg->entries);
Dan Kenigsberg07716712007-11-21 17:10:04 +02003099 if (r)
3100 goto out;
3101 break;
3102 }
3103 case KVM_GET_CPUID2: {
3104 struct kvm_cpuid2 __user *cpuid_arg = argp;
3105 struct kvm_cpuid2 cpuid;
3106
3107 r = -EFAULT;
3108 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
3109 goto out;
3110 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
Amit Shah19355472009-01-14 16:56:00 +00003111 cpuid_arg->entries);
Dan Kenigsberg07716712007-11-21 17:10:04 +02003112 if (r)
3113 goto out;
3114 r = -EFAULT;
3115 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
3116 goto out;
3117 r = 0;
3118 break;
3119 }
Carsten Otte313a3dc2007-10-11 19:16:52 +02003120 case KVM_GET_MSRS:
3121 r = msr_io(vcpu, argp, kvm_get_msr, 1);
3122 break;
3123 case KVM_SET_MSRS:
3124 r = msr_io(vcpu, argp, do_set_msr, 0);
3125 break;
Avi Kivityb209749f2007-10-22 16:50:39 +02003126 case KVM_TPR_ACCESS_REPORTING: {
3127 struct kvm_tpr_access_ctl tac;
3128
3129 r = -EFAULT;
3130 if (copy_from_user(&tac, argp, sizeof tac))
3131 goto out;
3132 r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
3133 if (r)
3134 goto out;
3135 r = -EFAULT;
3136 if (copy_to_user(argp, &tac, sizeof tac))
3137 goto out;
3138 r = 0;
3139 break;
3140 };
Avi Kivityb93463a2007-10-25 16:52:32 +02003141 case KVM_SET_VAPIC_ADDR: {
3142 struct kvm_vapic_addr va;
3143
3144 r = -EINVAL;
3145 if (!irqchip_in_kernel(vcpu->kvm))
3146 goto out;
3147 r = -EFAULT;
3148 if (copy_from_user(&va, argp, sizeof va))
3149 goto out;
3150 r = 0;
3151 kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
3152 break;
3153 }
Huang Ying890ca9a2009-05-11 16:48:15 +08003154 case KVM_X86_SETUP_MCE: {
3155 u64 mcg_cap;
3156
3157 r = -EFAULT;
3158 if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap))
3159 goto out;
3160 r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap);
3161 break;
3162 }
3163 case KVM_X86_SET_MCE: {
3164 struct kvm_x86_mce mce;
3165
3166 r = -EFAULT;
3167 if (copy_from_user(&mce, argp, sizeof mce))
3168 goto out;
3169 r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce);
3170 break;
3171 }
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003172 case KVM_GET_VCPU_EVENTS: {
3173 struct kvm_vcpu_events events;
3174
3175 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events);
3176
3177 r = -EFAULT;
3178 if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events)))
3179 break;
3180 r = 0;
3181 break;
3182 }
3183 case KVM_SET_VCPU_EVENTS: {
3184 struct kvm_vcpu_events events;
3185
3186 r = -EFAULT;
3187 if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events)))
3188 break;
3189
3190 r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
3191 break;
3192 }
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01003193 case KVM_GET_DEBUGREGS: {
3194 struct kvm_debugregs dbgregs;
3195
3196 kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
3197
3198 r = -EFAULT;
3199 if (copy_to_user(argp, &dbgregs,
3200 sizeof(struct kvm_debugregs)))
3201 break;
3202 r = 0;
3203 break;
3204 }
3205 case KVM_SET_DEBUGREGS: {
3206 struct kvm_debugregs dbgregs;
3207
3208 r = -EFAULT;
3209 if (copy_from_user(&dbgregs, argp,
3210 sizeof(struct kvm_debugregs)))
3211 break;
3212
3213 r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs);
3214 break;
3215 }
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003216 case KVM_GET_XSAVE: {
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003217 u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003218 r = -ENOMEM;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003219 if (!u.xsave)
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003220 break;
3221
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003222 kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003223
3224 r = -EFAULT;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003225 if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave)))
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003226 break;
3227 r = 0;
3228 break;
3229 }
3230 case KVM_SET_XSAVE: {
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003231 u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003232 r = -ENOMEM;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003233 if (!u.xsave)
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003234 break;
3235
3236 r = -EFAULT;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003237 if (copy_from_user(u.xsave, argp, sizeof(struct kvm_xsave)))
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003238 break;
3239
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003240 r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003241 break;
3242 }
3243 case KVM_GET_XCRS: {
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003244 u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003245 r = -ENOMEM;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003246 if (!u.xcrs)
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003247 break;
3248
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003249 kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003250
3251 r = -EFAULT;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003252 if (copy_to_user(argp, u.xcrs,
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003253 sizeof(struct kvm_xcrs)))
3254 break;
3255 r = 0;
3256 break;
3257 }
3258 case KVM_SET_XCRS: {
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003259 u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003260 r = -ENOMEM;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003261 if (!u.xcrs)
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003262 break;
3263
3264 r = -EFAULT;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003265 if (copy_from_user(u.xcrs, argp,
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003266 sizeof(struct kvm_xcrs)))
3267 break;
3268
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003269 r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08003270 break;
3271 }
Joerg Roedel92a1f122011-03-25 09:44:51 +01003272 case KVM_SET_TSC_KHZ: {
3273 u32 user_tsc_khz;
3274
3275 r = -EINVAL;
3276 if (!kvm_has_tsc_control)
3277 break;
3278
3279 user_tsc_khz = (u32)arg;
3280
3281 if (user_tsc_khz >= kvm_max_guest_tsc_khz)
3282 goto out;
3283
3284 kvm_x86_ops->set_tsc_khz(vcpu, user_tsc_khz);
3285
3286 r = 0;
3287 goto out;
3288 }
3289 case KVM_GET_TSC_KHZ: {
3290 r = -EIO;
3291 if (check_tsc_unstable())
3292 goto out;
3293
3294 r = vcpu_tsc_khz(vcpu);
3295
3296 goto out;
3297 }
Carsten Otte313a3dc2007-10-11 19:16:52 +02003298 default:
3299 r = -EINVAL;
3300 }
3301out:
Avi Kivityd1ac91d2010-06-20 15:54:43 +03003302 kfree(u.buffer);
Carsten Otte313a3dc2007-10-11 19:16:52 +02003303 return r;
3304}
3305
Carsten Otte1fe779f2007-10-29 16:08:35 +01003306static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
3307{
3308 int ret;
3309
3310 if (addr > (unsigned int)(-3 * PAGE_SIZE))
3311 return -1;
3312 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
3313 return ret;
3314}
3315
Sheng Yangb927a3c2009-07-21 10:42:48 +08003316static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm,
3317 u64 ident_addr)
3318{
3319 kvm->arch.ept_identity_map_addr = ident_addr;
3320 return 0;
3321}
3322
Carsten Otte1fe779f2007-10-29 16:08:35 +01003323static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
3324 u32 kvm_nr_mmu_pages)
3325{
3326 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
3327 return -EINVAL;
3328
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003329 mutex_lock(&kvm->slots_lock);
Marcelo Tosatti7c8a83b2009-05-12 18:55:43 -03003330 spin_lock(&kvm->mmu_lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003331
3332 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
Zhang Xiantaof05e70a2007-12-14 10:01:48 +08003333 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003334
Marcelo Tosatti7c8a83b2009-05-12 18:55:43 -03003335 spin_unlock(&kvm->mmu_lock);
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003336 mutex_unlock(&kvm->slots_lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003337 return 0;
3338}
3339
3340static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
3341{
Dave Hansen39de71e2010-08-19 18:11:14 -07003342 return kvm->arch.n_max_mmu_pages;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003343}
3344
Carsten Otte1fe779f2007-10-29 16:08:35 +01003345static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
3346{
3347 int r;
3348
3349 r = 0;
3350 switch (chip->chip_id) {
3351 case KVM_IRQCHIP_PIC_MASTER:
3352 memcpy(&chip->chip.pic,
3353 &pic_irqchip(kvm)->pics[0],
3354 sizeof(struct kvm_pic_state));
3355 break;
3356 case KVM_IRQCHIP_PIC_SLAVE:
3357 memcpy(&chip->chip.pic,
3358 &pic_irqchip(kvm)->pics[1],
3359 sizeof(struct kvm_pic_state));
3360 break;
3361 case KVM_IRQCHIP_IOAPIC:
Gleb Natapoveba02262009-08-24 11:54:25 +03003362 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003363 break;
3364 default:
3365 r = -EINVAL;
3366 break;
3367 }
3368 return r;
3369}
3370
3371static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
3372{
3373 int r;
3374
3375 r = 0;
3376 switch (chip->chip_id) {
3377 case KVM_IRQCHIP_PIC_MASTER:
Avi Kivityf4f51052010-09-19 18:44:07 +02003378 spin_lock(&pic_irqchip(kvm)->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003379 memcpy(&pic_irqchip(kvm)->pics[0],
3380 &chip->chip.pic,
3381 sizeof(struct kvm_pic_state));
Avi Kivityf4f51052010-09-19 18:44:07 +02003382 spin_unlock(&pic_irqchip(kvm)->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003383 break;
3384 case KVM_IRQCHIP_PIC_SLAVE:
Avi Kivityf4f51052010-09-19 18:44:07 +02003385 spin_lock(&pic_irqchip(kvm)->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003386 memcpy(&pic_irqchip(kvm)->pics[1],
3387 &chip->chip.pic,
3388 sizeof(struct kvm_pic_state));
Avi Kivityf4f51052010-09-19 18:44:07 +02003389 spin_unlock(&pic_irqchip(kvm)->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003390 break;
3391 case KVM_IRQCHIP_IOAPIC:
Gleb Natapoveba02262009-08-24 11:54:25 +03003392 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003393 break;
3394 default:
3395 r = -EINVAL;
3396 break;
3397 }
3398 kvm_pic_update_irq(pic_irqchip(kvm));
3399 return r;
3400}
3401
Sheng Yange0f63cb2008-03-04 00:50:59 +08003402static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps)
3403{
3404 int r = 0;
3405
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003406 mutex_lock(&kvm->arch.vpit->pit_state.lock);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003407 memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state));
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003408 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003409 return r;
3410}
3411
3412static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps)
3413{
3414 int r = 0;
3415
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003416 mutex_lock(&kvm->arch.vpit->pit_state.lock);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003417 memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state));
Beth Kone9f42752009-07-07 11:50:38 -04003418 kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0);
3419 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
3420 return r;
3421}
3422
3423static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
3424{
3425 int r = 0;
3426
3427 mutex_lock(&kvm->arch.vpit->pit_state.lock);
3428 memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels,
3429 sizeof(ps->channels));
3430 ps->flags = kvm->arch.vpit->pit_state.flags;
3431 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04003432 memset(&ps->reserved, 0, sizeof(ps->reserved));
Beth Kone9f42752009-07-07 11:50:38 -04003433 return r;
3434}
3435
3436static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
3437{
3438 int r = 0, start = 0;
3439 u32 prev_legacy, cur_legacy;
3440 mutex_lock(&kvm->arch.vpit->pit_state.lock);
3441 prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY;
3442 cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY;
3443 if (!prev_legacy && cur_legacy)
3444 start = 1;
3445 memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels,
3446 sizeof(kvm->arch.vpit->pit_state.channels));
3447 kvm->arch.vpit->pit_state.flags = ps->flags;
3448 kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start);
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003449 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003450 return r;
3451}
3452
Marcelo Tosatti52d939a2008-12-30 15:55:06 -02003453static int kvm_vm_ioctl_reinject(struct kvm *kvm,
3454 struct kvm_reinject_control *control)
3455{
3456 if (!kvm->arch.vpit)
3457 return -ENXIO;
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003458 mutex_lock(&kvm->arch.vpit->pit_state.lock);
Marcelo Tosatti52d939a2008-12-30 15:55:06 -02003459 kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject;
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003460 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
Marcelo Tosatti52d939a2008-12-30 15:55:06 -02003461 return 0;
3462}
3463
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003464/*
3465 * Get (and clear) the dirty memory log for a memory slot.
3466 */
3467int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
3468 struct kvm_dirty_log *log)
3469{
Takuya Yoshikawa87bf6e72010-04-12 19:35:35 +09003470 int r, i;
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003471 struct kvm_memory_slot *memslot;
Takuya Yoshikawa87bf6e72010-04-12 19:35:35 +09003472 unsigned long n;
Marcelo Tosattib050b012009-12-23 14:35:22 -02003473 unsigned long is_dirty = 0;
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003474
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003475 mutex_lock(&kvm->slots_lock);
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003476
Marcelo Tosattib050b012009-12-23 14:35:22 -02003477 r = -EINVAL;
3478 if (log->slot >= KVM_MEMORY_SLOTS)
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003479 goto out;
3480
Marcelo Tosattib050b012009-12-23 14:35:22 -02003481 memslot = &kvm->memslots->memslots[log->slot];
3482 r = -ENOENT;
3483 if (!memslot->dirty_bitmap)
3484 goto out;
3485
Takuya Yoshikawa87bf6e72010-04-12 19:35:35 +09003486 n = kvm_dirty_bitmap_bytes(memslot);
Marcelo Tosattib050b012009-12-23 14:35:22 -02003487
Marcelo Tosattib050b012009-12-23 14:35:22 -02003488 for (i = 0; !is_dirty && i < n/sizeof(long); i++)
3489 is_dirty = memslot->dirty_bitmap[i];
3490
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003491 /* If nothing is dirty, don't bother messing with page tables. */
3492 if (is_dirty) {
Marcelo Tosattib050b012009-12-23 14:35:22 -02003493 struct kvm_memslots *slots, *old_slots;
Takuya Yoshikawa914ebcc2010-04-28 18:50:36 +09003494 unsigned long *dirty_bitmap;
Marcelo Tosattib050b012009-12-23 14:35:22 -02003495
Takuya Yoshikawa515a0122010-10-27 18:23:54 +09003496 dirty_bitmap = memslot->dirty_bitmap_head;
3497 if (memslot->dirty_bitmap == dirty_bitmap)
3498 dirty_bitmap += n / sizeof(long);
Takuya Yoshikawa914ebcc2010-04-28 18:50:36 +09003499 memset(dirty_bitmap, 0, n);
Marcelo Tosattib050b012009-12-23 14:35:22 -02003500
Takuya Yoshikawa914ebcc2010-04-28 18:50:36 +09003501 r = -ENOMEM;
3502 slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
Takuya Yoshikawa515a0122010-10-27 18:23:54 +09003503 if (!slots)
Takuya Yoshikawa914ebcc2010-04-28 18:50:36 +09003504 goto out;
Marcelo Tosattib050b012009-12-23 14:35:22 -02003505 memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
3506 slots->memslots[log->slot].dirty_bitmap = dirty_bitmap;
Gleb Natapov49c77542010-10-18 15:22:23 +02003507 slots->generation++;
Marcelo Tosattib050b012009-12-23 14:35:22 -02003508
3509 old_slots = kvm->memslots;
3510 rcu_assign_pointer(kvm->memslots, slots);
3511 synchronize_srcu_expedited(&kvm->srcu);
3512 dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap;
3513 kfree(old_slots);
Takuya Yoshikawa914ebcc2010-04-28 18:50:36 +09003514
Michael S. Tsirkinedde99c2010-10-25 03:21:24 +02003515 spin_lock(&kvm->mmu_lock);
3516 kvm_mmu_slot_remove_write_access(kvm, log->slot);
3517 spin_unlock(&kvm->mmu_lock);
3518
Takuya Yoshikawa914ebcc2010-04-28 18:50:36 +09003519 r = -EFAULT;
Takuya Yoshikawa515a0122010-10-27 18:23:54 +09003520 if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n))
Takuya Yoshikawa914ebcc2010-04-28 18:50:36 +09003521 goto out;
Takuya Yoshikawa914ebcc2010-04-28 18:50:36 +09003522 } else {
3523 r = -EFAULT;
3524 if (clear_user(log->dirty_bitmap, n))
3525 goto out;
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003526 }
Marcelo Tosattib050b012009-12-23 14:35:22 -02003527
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003528 r = 0;
3529out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003530 mutex_unlock(&kvm->slots_lock);
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003531 return r;
3532}
3533
Carsten Otte1fe779f2007-10-29 16:08:35 +01003534long kvm_arch_vm_ioctl(struct file *filp,
3535 unsigned int ioctl, unsigned long arg)
3536{
3537 struct kvm *kvm = filp->private_data;
3538 void __user *argp = (void __user *)arg;
Avi Kivity367e1312009-08-26 14:57:07 +03003539 int r = -ENOTTY;
Dave Hansenf0d66272008-08-11 10:01:45 -07003540 /*
3541 * This union makes it completely explicit to gcc-3.x
3542 * that these two variables' stack usage should be
3543 * combined, not added together.
3544 */
3545 union {
3546 struct kvm_pit_state ps;
Beth Kone9f42752009-07-07 11:50:38 -04003547 struct kvm_pit_state2 ps2;
Jan Kiszkac5ff41c2009-05-14 22:42:53 +02003548 struct kvm_pit_config pit_config;
Dave Hansenf0d66272008-08-11 10:01:45 -07003549 } u;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003550
3551 switch (ioctl) {
3552 case KVM_SET_TSS_ADDR:
3553 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
3554 if (r < 0)
3555 goto out;
3556 break;
Sheng Yangb927a3c2009-07-21 10:42:48 +08003557 case KVM_SET_IDENTITY_MAP_ADDR: {
3558 u64 ident_addr;
3559
3560 r = -EFAULT;
3561 if (copy_from_user(&ident_addr, argp, sizeof ident_addr))
3562 goto out;
3563 r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
3564 if (r < 0)
3565 goto out;
3566 break;
3567 }
Carsten Otte1fe779f2007-10-29 16:08:35 +01003568 case KVM_SET_NR_MMU_PAGES:
3569 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
3570 if (r)
3571 goto out;
3572 break;
3573 case KVM_GET_NR_MMU_PAGES:
3574 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
3575 break;
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003576 case KVM_CREATE_IRQCHIP: {
3577 struct kvm_pic *vpic;
3578
3579 mutex_lock(&kvm->lock);
3580 r = -EEXIST;
3581 if (kvm->arch.vpic)
3582 goto create_irqchip_unlock;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003583 r = -ENOMEM;
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003584 vpic = kvm_create_pic(kvm);
3585 if (vpic) {
Carsten Otte1fe779f2007-10-29 16:08:35 +01003586 r = kvm_ioapic_init(kvm);
3587 if (r) {
Takuya Yoshikawa175504c2010-12-16 01:41:37 +09003588 mutex_lock(&kvm->slots_lock);
Wei Yongjun72bb2fc2010-02-09 10:33:03 +08003589 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
Sasha Levin743eeb02011-07-27 16:00:48 +03003590 &vpic->dev_master);
3591 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
3592 &vpic->dev_slave);
3593 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
3594 &vpic->dev_eclr);
Takuya Yoshikawa175504c2010-12-16 01:41:37 +09003595 mutex_unlock(&kvm->slots_lock);
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003596 kfree(vpic);
3597 goto create_irqchip_unlock;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003598 }
3599 } else
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003600 goto create_irqchip_unlock;
3601 smp_wmb();
3602 kvm->arch.vpic = vpic;
3603 smp_wmb();
Avi Kivity399ec802008-11-19 13:58:46 +02003604 r = kvm_setup_default_irq_routing(kvm);
3605 if (r) {
Takuya Yoshikawa175504c2010-12-16 01:41:37 +09003606 mutex_lock(&kvm->slots_lock);
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003607 mutex_lock(&kvm->irq_lock);
Wei Yongjun72bb2fc2010-02-09 10:33:03 +08003608 kvm_ioapic_destroy(kvm);
3609 kvm_destroy_pic(kvm);
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003610 mutex_unlock(&kvm->irq_lock);
Takuya Yoshikawa175504c2010-12-16 01:41:37 +09003611 mutex_unlock(&kvm->slots_lock);
Avi Kivity399ec802008-11-19 13:58:46 +02003612 }
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003613 create_irqchip_unlock:
3614 mutex_unlock(&kvm->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003615 break;
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003616 }
Sheng Yang78376992008-01-28 05:10:22 +08003617 case KVM_CREATE_PIT:
Jan Kiszkac5ff41c2009-05-14 22:42:53 +02003618 u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY;
3619 goto create_pit;
3620 case KVM_CREATE_PIT2:
3621 r = -EFAULT;
3622 if (copy_from_user(&u.pit_config, argp,
3623 sizeof(struct kvm_pit_config)))
3624 goto out;
3625 create_pit:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003626 mutex_lock(&kvm->slots_lock);
Avi Kivity269e05e2009-01-05 15:21:42 +02003627 r = -EEXIST;
3628 if (kvm->arch.vpit)
3629 goto create_pit_unlock;
Sheng Yang78376992008-01-28 05:10:22 +08003630 r = -ENOMEM;
Jan Kiszkac5ff41c2009-05-14 22:42:53 +02003631 kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags);
Sheng Yang78376992008-01-28 05:10:22 +08003632 if (kvm->arch.vpit)
3633 r = 0;
Avi Kivity269e05e2009-01-05 15:21:42 +02003634 create_pit_unlock:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003635 mutex_unlock(&kvm->slots_lock);
Sheng Yang78376992008-01-28 05:10:22 +08003636 break;
Gleb Natapov49256632009-02-04 17:28:14 +02003637 case KVM_IRQ_LINE_STATUS:
Carsten Otte1fe779f2007-10-29 16:08:35 +01003638 case KVM_IRQ_LINE: {
3639 struct kvm_irq_level irq_event;
3640
3641 r = -EFAULT;
3642 if (copy_from_user(&irq_event, argp, sizeof irq_event))
3643 goto out;
Wei Yongjun160d2f62010-03-12 10:09:45 +08003644 r = -ENXIO;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003645 if (irqchip_in_kernel(kvm)) {
Gleb Natapov49256632009-02-04 17:28:14 +02003646 __s32 status;
Gleb Natapov49256632009-02-04 17:28:14 +02003647 status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
3648 irq_event.irq, irq_event.level);
Gleb Natapov49256632009-02-04 17:28:14 +02003649 if (ioctl == KVM_IRQ_LINE_STATUS) {
Wei Yongjun160d2f62010-03-12 10:09:45 +08003650 r = -EFAULT;
Gleb Natapov49256632009-02-04 17:28:14 +02003651 irq_event.status = status;
3652 if (copy_to_user(argp, &irq_event,
3653 sizeof irq_event))
3654 goto out;
3655 }
Carsten Otte1fe779f2007-10-29 16:08:35 +01003656 r = 0;
3657 }
3658 break;
3659 }
3660 case KVM_GET_IRQCHIP: {
3661 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
Dave Hansenf0d66272008-08-11 10:01:45 -07003662 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003663
Dave Hansenf0d66272008-08-11 10:01:45 -07003664 r = -ENOMEM;
3665 if (!chip)
Carsten Otte1fe779f2007-10-29 16:08:35 +01003666 goto out;
Dave Hansenf0d66272008-08-11 10:01:45 -07003667 r = -EFAULT;
3668 if (copy_from_user(chip, argp, sizeof *chip))
3669 goto get_irqchip_out;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003670 r = -ENXIO;
3671 if (!irqchip_in_kernel(kvm))
Dave Hansenf0d66272008-08-11 10:01:45 -07003672 goto get_irqchip_out;
3673 r = kvm_vm_ioctl_get_irqchip(kvm, chip);
3674 if (r)
3675 goto get_irqchip_out;
3676 r = -EFAULT;
3677 if (copy_to_user(argp, chip, sizeof *chip))
3678 goto get_irqchip_out;
3679 r = 0;
3680 get_irqchip_out:
3681 kfree(chip);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003682 if (r)
3683 goto out;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003684 break;
3685 }
3686 case KVM_SET_IRQCHIP: {
3687 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
Dave Hansenf0d66272008-08-11 10:01:45 -07003688 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003689
Dave Hansenf0d66272008-08-11 10:01:45 -07003690 r = -ENOMEM;
3691 if (!chip)
Carsten Otte1fe779f2007-10-29 16:08:35 +01003692 goto out;
Dave Hansenf0d66272008-08-11 10:01:45 -07003693 r = -EFAULT;
3694 if (copy_from_user(chip, argp, sizeof *chip))
3695 goto set_irqchip_out;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003696 r = -ENXIO;
3697 if (!irqchip_in_kernel(kvm))
Dave Hansenf0d66272008-08-11 10:01:45 -07003698 goto set_irqchip_out;
3699 r = kvm_vm_ioctl_set_irqchip(kvm, chip);
3700 if (r)
3701 goto set_irqchip_out;
3702 r = 0;
3703 set_irqchip_out:
3704 kfree(chip);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003705 if (r)
3706 goto out;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003707 break;
3708 }
Sheng Yange0f63cb2008-03-04 00:50:59 +08003709 case KVM_GET_PIT: {
Sheng Yange0f63cb2008-03-04 00:50:59 +08003710 r = -EFAULT;
Dave Hansenf0d66272008-08-11 10:01:45 -07003711 if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state)))
Sheng Yange0f63cb2008-03-04 00:50:59 +08003712 goto out;
3713 r = -ENXIO;
3714 if (!kvm->arch.vpit)
3715 goto out;
Dave Hansenf0d66272008-08-11 10:01:45 -07003716 r = kvm_vm_ioctl_get_pit(kvm, &u.ps);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003717 if (r)
3718 goto out;
3719 r = -EFAULT;
Dave Hansenf0d66272008-08-11 10:01:45 -07003720 if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state)))
Sheng Yange0f63cb2008-03-04 00:50:59 +08003721 goto out;
3722 r = 0;
3723 break;
3724 }
3725 case KVM_SET_PIT: {
Sheng Yange0f63cb2008-03-04 00:50:59 +08003726 r = -EFAULT;
Dave Hansenf0d66272008-08-11 10:01:45 -07003727 if (copy_from_user(&u.ps, argp, sizeof u.ps))
Sheng Yange0f63cb2008-03-04 00:50:59 +08003728 goto out;
3729 r = -ENXIO;
3730 if (!kvm->arch.vpit)
3731 goto out;
Dave Hansenf0d66272008-08-11 10:01:45 -07003732 r = kvm_vm_ioctl_set_pit(kvm, &u.ps);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003733 if (r)
3734 goto out;
3735 r = 0;
3736 break;
3737 }
Beth Kone9f42752009-07-07 11:50:38 -04003738 case KVM_GET_PIT2: {
3739 r = -ENXIO;
3740 if (!kvm->arch.vpit)
3741 goto out;
3742 r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2);
3743 if (r)
3744 goto out;
3745 r = -EFAULT;
3746 if (copy_to_user(argp, &u.ps2, sizeof(u.ps2)))
3747 goto out;
3748 r = 0;
3749 break;
3750 }
3751 case KVM_SET_PIT2: {
3752 r = -EFAULT;
3753 if (copy_from_user(&u.ps2, argp, sizeof(u.ps2)))
3754 goto out;
3755 r = -ENXIO;
3756 if (!kvm->arch.vpit)
3757 goto out;
3758 r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2);
3759 if (r)
3760 goto out;
3761 r = 0;
3762 break;
3763 }
Marcelo Tosatti52d939a2008-12-30 15:55:06 -02003764 case KVM_REINJECT_CONTROL: {
3765 struct kvm_reinject_control control;
3766 r = -EFAULT;
3767 if (copy_from_user(&control, argp, sizeof(control)))
3768 goto out;
3769 r = kvm_vm_ioctl_reinject(kvm, &control);
3770 if (r)
3771 goto out;
3772 r = 0;
3773 break;
3774 }
Ed Swierkffde22a2009-10-15 15:21:43 -07003775 case KVM_XEN_HVM_CONFIG: {
3776 r = -EFAULT;
3777 if (copy_from_user(&kvm->arch.xen_hvm_config, argp,
3778 sizeof(struct kvm_xen_hvm_config)))
3779 goto out;
3780 r = -EINVAL;
3781 if (kvm->arch.xen_hvm_config.flags)
3782 goto out;
3783 r = 0;
3784 break;
3785 }
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003786 case KVM_SET_CLOCK: {
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003787 struct kvm_clock_data user_ns;
3788 u64 now_ns;
3789 s64 delta;
3790
3791 r = -EFAULT;
3792 if (copy_from_user(&user_ns, argp, sizeof(user_ns)))
3793 goto out;
3794
3795 r = -EINVAL;
3796 if (user_ns.flags)
3797 goto out;
3798
3799 r = 0;
Avi Kivity395c6b02010-10-04 12:55:49 +02003800 local_irq_disable();
Zachary Amsden759379d2010-08-19 22:07:25 -10003801 now_ns = get_kernel_ns();
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003802 delta = user_ns.clock - now_ns;
Avi Kivity395c6b02010-10-04 12:55:49 +02003803 local_irq_enable();
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003804 kvm->arch.kvmclock_offset = delta;
3805 break;
3806 }
3807 case KVM_GET_CLOCK: {
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003808 struct kvm_clock_data user_ns;
3809 u64 now_ns;
3810
Avi Kivity395c6b02010-10-04 12:55:49 +02003811 local_irq_disable();
Zachary Amsden759379d2010-08-19 22:07:25 -10003812 now_ns = get_kernel_ns();
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003813 user_ns.clock = kvm->arch.kvmclock_offset + now_ns;
Avi Kivity395c6b02010-10-04 12:55:49 +02003814 local_irq_enable();
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003815 user_ns.flags = 0;
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04003816 memset(&user_ns.pad, 0, sizeof(user_ns.pad));
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003817
3818 r = -EFAULT;
3819 if (copy_to_user(argp, &user_ns, sizeof(user_ns)))
3820 goto out;
3821 r = 0;
3822 break;
3823 }
3824
Carsten Otte1fe779f2007-10-29 16:08:35 +01003825 default:
3826 ;
3827 }
3828out:
3829 return r;
3830}
3831
Zhang Xiantaoa16b0432007-11-16 14:38:21 +08003832static void kvm_init_msr_list(void)
Carsten Otte043405e2007-10-10 17:16:19 +02003833{
3834 u32 dummy[2];
3835 unsigned i, j;
3836
Glauber Costae3267cb2009-10-06 13:24:50 -04003837 /* skip the first msrs in the list. KVM-specific */
3838 for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) {
Carsten Otte043405e2007-10-10 17:16:19 +02003839 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
3840 continue;
3841 if (j < i)
3842 msrs_to_save[j] = msrs_to_save[i];
3843 j++;
3844 }
3845 num_msrs_to_save = j;
3846}
3847
Michael S. Tsirkinbda90202009-06-29 22:24:32 +03003848static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len,
3849 const void *v)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003850{
Avi Kivity70252a12010-01-19 12:51:22 +02003851 int handled = 0;
3852 int n;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003853
Avi Kivity70252a12010-01-19 12:51:22 +02003854 do {
3855 n = min(len, 8);
3856 if (!(vcpu->arch.apic &&
3857 !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v))
3858 && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v))
3859 break;
3860 handled += n;
3861 addr += n;
3862 len -= n;
3863 v += n;
3864 } while (len);
3865
3866 return handled;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003867}
3868
Michael S. Tsirkinbda90202009-06-29 22:24:32 +03003869static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003870{
Avi Kivity70252a12010-01-19 12:51:22 +02003871 int handled = 0;
3872 int n;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003873
Avi Kivity70252a12010-01-19 12:51:22 +02003874 do {
3875 n = min(len, 8);
3876 if (!(vcpu->arch.apic &&
3877 !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v))
3878 && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v))
3879 break;
3880 trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v);
3881 handled += n;
3882 addr += n;
3883 len -= n;
3884 v += n;
3885 } while (len);
3886
3887 return handled;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003888}
3889
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02003890static void kvm_set_segment(struct kvm_vcpu *vcpu,
3891 struct kvm_segment *var, int seg)
3892{
3893 kvm_x86_ops->set_segment(vcpu, var, seg);
3894}
3895
3896void kvm_get_segment(struct kvm_vcpu *vcpu,
3897 struct kvm_segment *var, int seg)
3898{
3899 kvm_x86_ops->get_segment(vcpu, var, seg);
3900}
3901
Joerg Roedelc30a3582010-09-10 17:30:48 +02003902static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
3903{
3904 return gpa;
3905}
3906
Joerg Roedel02f59dc2010-09-10 17:30:54 +02003907static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
3908{
3909 gpa_t t_gpa;
Avi Kivityab9ae312010-11-22 17:53:26 +02003910 struct x86_exception exception;
Joerg Roedel02f59dc2010-09-10 17:30:54 +02003911
3912 BUG_ON(!mmu_is_nested(vcpu));
3913
3914 /* NPT walks are always user-walks */
3915 access |= PFERR_USER_MASK;
Avi Kivityab9ae312010-11-22 17:53:26 +02003916 t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception);
Joerg Roedel02f59dc2010-09-10 17:30:54 +02003917
3918 return t_gpa;
3919}
3920
Avi Kivityab9ae312010-11-22 17:53:26 +02003921gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
3922 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003923{
3924 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
Avi Kivityab9ae312010-11-22 17:53:26 +02003925 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003926}
3927
Avi Kivityab9ae312010-11-22 17:53:26 +02003928 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
3929 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003930{
3931 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3932 access |= PFERR_FETCH_MASK;
Avi Kivityab9ae312010-11-22 17:53:26 +02003933 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003934}
3935
Avi Kivityab9ae312010-11-22 17:53:26 +02003936gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
3937 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003938{
3939 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3940 access |= PFERR_WRITE_MASK;
Avi Kivityab9ae312010-11-22 17:53:26 +02003941 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003942}
3943
3944/* uses this to access any guest's mapped memory without checking CPL */
Avi Kivityab9ae312010-11-22 17:53:26 +02003945gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
3946 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003947{
Avi Kivityab9ae312010-11-22 17:53:26 +02003948 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003949}
3950
3951static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
3952 struct kvm_vcpu *vcpu, u32 access,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003953 struct x86_exception *exception)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003954{
3955 void *data = val;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003956 int r = X86EMUL_CONTINUE;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003957
3958 while (bytes) {
Joerg Roedel14dfe852010-09-10 17:30:49 +02003959 gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access,
Avi Kivityab9ae312010-11-22 17:53:26 +02003960 exception);
Carsten Ottebbd9b642007-10-30 18:44:21 +01003961 unsigned offset = addr & (PAGE_SIZE-1);
Izik Eidus77c20022008-12-29 01:42:19 +02003962 unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
Carsten Ottebbd9b642007-10-30 18:44:21 +01003963 int ret;
3964
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003965 if (gpa == UNMAPPED_GVA)
Avi Kivityab9ae312010-11-22 17:53:26 +02003966 return X86EMUL_PROPAGATE_FAULT;
Izik Eidus77c20022008-12-29 01:42:19 +02003967 ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003968 if (ret < 0) {
Gleb Natapovc3cd7ff2010-04-28 19:15:35 +03003969 r = X86EMUL_IO_NEEDED;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003970 goto out;
3971 }
Carsten Ottebbd9b642007-10-30 18:44:21 +01003972
Izik Eidus77c20022008-12-29 01:42:19 +02003973 bytes -= toread;
3974 data += toread;
3975 addr += toread;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003976 }
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003977out:
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003978 return r;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003979}
Izik Eidus77c20022008-12-29 01:42:19 +02003980
Gleb Natapov1871c602010-02-10 14:21:32 +02003981/* used for instruction fetching */
Avi Kivity0f65dd72011-04-20 13:37:53 +03003982static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt,
3983 gva_t addr, void *val, unsigned int bytes,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003984 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003985{
Avi Kivity0f65dd72011-04-20 13:37:53 +03003986 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov1871c602010-02-10 14:21:32 +02003987 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
Avi Kivity0f65dd72011-04-20 13:37:53 +03003988
Gleb Natapov1871c602010-02-10 14:21:32 +02003989 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003990 access | PFERR_FETCH_MASK,
3991 exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003992}
3993
Nadav Har'El064aea72011-05-25 23:04:56 +03003994int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt,
Avi Kivity0f65dd72011-04-20 13:37:53 +03003995 gva_t addr, void *val, unsigned int bytes,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003996 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003997{
Avi Kivity0f65dd72011-04-20 13:37:53 +03003998 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov1871c602010-02-10 14:21:32 +02003999 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
Avi Kivity0f65dd72011-04-20 13:37:53 +03004000
Gleb Natapov1871c602010-02-10 14:21:32 +02004001 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02004002 exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02004003}
Nadav Har'El064aea72011-05-25 23:04:56 +03004004EXPORT_SYMBOL_GPL(kvm_read_guest_virt);
Gleb Natapov1871c602010-02-10 14:21:32 +02004005
Avi Kivity0f65dd72011-04-20 13:37:53 +03004006static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt,
4007 gva_t addr, void *val, unsigned int bytes,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02004008 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02004009{
Avi Kivity0f65dd72011-04-20 13:37:53 +03004010 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Avi Kivitybcc55cb2010-11-22 17:53:22 +02004011 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02004012}
4013
Nadav Har'El6a4d7552011-05-25 23:08:00 +03004014int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
Avi Kivity0f65dd72011-04-20 13:37:53 +03004015 gva_t addr, void *val,
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004016 unsigned int bytes,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02004017 struct x86_exception *exception)
Izik Eidus77c20022008-12-29 01:42:19 +02004018{
Avi Kivity0f65dd72011-04-20 13:37:53 +03004019 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Izik Eidus77c20022008-12-29 01:42:19 +02004020 void *data = val;
4021 int r = X86EMUL_CONTINUE;
4022
4023 while (bytes) {
Joerg Roedel14dfe852010-09-10 17:30:49 +02004024 gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr,
4025 PFERR_WRITE_MASK,
Avi Kivityab9ae312010-11-22 17:53:26 +02004026 exception);
Izik Eidus77c20022008-12-29 01:42:19 +02004027 unsigned offset = addr & (PAGE_SIZE-1);
4028 unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
4029 int ret;
4030
Avi Kivitybcc55cb2010-11-22 17:53:22 +02004031 if (gpa == UNMAPPED_GVA)
Avi Kivityab9ae312010-11-22 17:53:26 +02004032 return X86EMUL_PROPAGATE_FAULT;
Izik Eidus77c20022008-12-29 01:42:19 +02004033 ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite);
4034 if (ret < 0) {
Gleb Natapovc3cd7ff2010-04-28 19:15:35 +03004035 r = X86EMUL_IO_NEEDED;
Izik Eidus77c20022008-12-29 01:42:19 +02004036 goto out;
4037 }
4038
4039 bytes -= towrite;
4040 data += towrite;
4041 addr += towrite;
4042 }
4043out:
4044 return r;
4045}
Nadav Har'El6a4d7552011-05-25 23:08:00 +03004046EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system);
Izik Eidus77c20022008-12-29 01:42:19 +02004047
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08004048static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva,
4049 gpa_t *gpa, struct x86_exception *exception,
4050 bool write)
4051{
4052 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
4053
Xiao Guangrongbebb1062011-07-12 03:23:20 +08004054 if (vcpu_match_mmio_gva(vcpu, gva) &&
4055 check_write_user_access(vcpu, write, access,
4056 vcpu->arch.access)) {
4057 *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT |
4058 (gva & (PAGE_SIZE - 1));
Xiao Guangrong4f022642011-07-12 03:34:24 +08004059 trace_vcpu_match_mmio(gva, *gpa, write, false);
Xiao Guangrongbebb1062011-07-12 03:23:20 +08004060 return 1;
4061 }
4062
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08004063 if (write)
4064 access |= PFERR_WRITE_MASK;
4065
4066 *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
4067
4068 if (*gpa == UNMAPPED_GVA)
4069 return -1;
4070
4071 /* For APIC access vmexit */
4072 if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
4073 return 1;
4074
Xiao Guangrong4f022642011-07-12 03:34:24 +08004075 if (vcpu_match_mmio_gpa(vcpu, *gpa)) {
4076 trace_vcpu_match_mmio(gva, *gpa, write, true);
Xiao Guangrongbebb1062011-07-12 03:23:20 +08004077 return 1;
Xiao Guangrong4f022642011-07-12 03:34:24 +08004078 }
Xiao Guangrongbebb1062011-07-12 03:23:20 +08004079
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08004080 return 0;
4081}
4082
Marcelo Tosatti3200f402008-03-29 20:17:59 -03004083int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02004084 const void *val, int bytes)
Avi Kivity9f811282008-03-02 14:06:05 +02004085{
4086 int ret;
4087
4088 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
4089 if (ret < 0)
4090 return 0;
Marcelo Tosattiad218f82008-12-01 22:32:05 -02004091 kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1);
Avi Kivity9f811282008-03-02 14:06:05 +02004092 return 1;
4093}
4094
Xiao Guangrong77d197b2011-07-13 14:31:50 +08004095struct read_write_emulator_ops {
4096 int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val,
4097 int bytes);
4098 int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa,
4099 void *val, int bytes);
4100 int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa,
4101 int bytes, void *val);
4102 int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa,
4103 void *val, int bytes);
4104 bool write;
4105};
4106
4107static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes)
4108{
4109 if (vcpu->mmio_read_completed) {
4110 memcpy(val, vcpu->mmio_data, bytes);
4111 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes,
4112 vcpu->mmio_phys_addr, *(u64 *)val);
4113 vcpu->mmio_read_completed = 0;
4114 return 1;
4115 }
4116
4117 return 0;
4118}
4119
4120static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa,
4121 void *val, int bytes)
4122{
4123 return !kvm_read_guest(vcpu->kvm, gpa, val, bytes);
4124}
4125
4126static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa,
4127 void *val, int bytes)
4128{
4129 return emulator_write_phys(vcpu, gpa, val, bytes);
4130}
4131
4132static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val)
4133{
4134 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val);
4135 return vcpu_mmio_write(vcpu, gpa, bytes, val);
4136}
4137
4138static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa,
4139 void *val, int bytes)
4140{
4141 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0);
4142 return X86EMUL_IO_NEEDED;
4143}
4144
4145static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa,
4146 void *val, int bytes)
4147{
4148 memcpy(vcpu->mmio_data, val, bytes);
4149 memcpy(vcpu->run->mmio.data, vcpu->mmio_data, 8);
4150 return X86EMUL_CONTINUE;
4151}
4152
4153static struct read_write_emulator_ops read_emultor = {
4154 .read_write_prepare = read_prepare,
4155 .read_write_emulate = read_emulate,
4156 .read_write_mmio = vcpu_mmio_read,
4157 .read_write_exit_mmio = read_exit_mmio,
4158};
4159
4160static struct read_write_emulator_ops write_emultor = {
4161 .read_write_emulate = write_emulate,
4162 .read_write_mmio = write_mmio,
4163 .read_write_exit_mmio = write_exit_mmio,
4164 .write = true,
4165};
4166
Xiao Guangrong22388a32011-07-13 14:32:31 +08004167static int emulator_read_write_onepage(unsigned long addr, void *val,
4168 unsigned int bytes,
4169 struct x86_exception *exception,
4170 struct kvm_vcpu *vcpu,
4171 struct read_write_emulator_ops *ops)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004172{
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08004173 gpa_t gpa;
4174 int handled, ret;
Xiao Guangrong22388a32011-07-13 14:32:31 +08004175 bool write = ops->write;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05004176
Xiao Guangrong22388a32011-07-13 14:32:31 +08004177 if (ops->read_write_prepare &&
4178 ops->read_write_prepare(vcpu, val, bytes))
4179 return X86EMUL_CONTINUE;
4180
4181 ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004182
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08004183 if (ret < 0)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004184 return X86EMUL_PROPAGATE_FAULT;
Carsten Ottebbd9b642007-10-30 18:44:21 +01004185
4186 /* For APIC access vmexit */
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08004187 if (ret)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004188 goto mmio;
4189
Xiao Guangrong22388a32011-07-13 14:32:31 +08004190 if (ops->read_write_emulate(vcpu, gpa, val, bytes))
Carsten Ottebbd9b642007-10-30 18:44:21 +01004191 return X86EMUL_CONTINUE;
4192
4193mmio:
4194 /*
4195 * Is this MMIO handled locally?
4196 */
Xiao Guangrong22388a32011-07-13 14:32:31 +08004197 handled = ops->read_write_mmio(vcpu, gpa, bytes, val);
Avi Kivity70252a12010-01-19 12:51:22 +02004198 if (handled == bytes)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004199 return X86EMUL_CONTINUE;
Carsten Ottebbd9b642007-10-30 18:44:21 +01004200
Avi Kivity70252a12010-01-19 12:51:22 +02004201 gpa += handled;
4202 bytes -= handled;
4203 val += handled;
4204
Carsten Ottebbd9b642007-10-30 18:44:21 +01004205 vcpu->mmio_needed = 1;
Gleb Natapov411c35b2010-04-28 19:15:34 +03004206 vcpu->run->exit_reason = KVM_EXIT_MMIO;
4207 vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa;
Avi Kivitycef4dea2010-01-20 12:01:20 +02004208 vcpu->mmio_size = bytes;
4209 vcpu->run->mmio.len = min(vcpu->mmio_size, 8);
Xiao Guangrong22388a32011-07-13 14:32:31 +08004210 vcpu->run->mmio.is_write = vcpu->mmio_is_write = write;
Avi Kivitycef4dea2010-01-20 12:01:20 +02004211 vcpu->mmio_index = 0;
Carsten Ottebbd9b642007-10-30 18:44:21 +01004212
Xiao Guangrong22388a32011-07-13 14:32:31 +08004213 return ops->read_write_exit_mmio(vcpu, gpa, val, bytes);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004214}
4215
Xiao Guangrong22388a32011-07-13 14:32:31 +08004216int emulator_read_write(struct x86_emulate_ctxt *ctxt, unsigned long addr,
4217 void *val, unsigned int bytes,
4218 struct x86_exception *exception,
4219 struct read_write_emulator_ops *ops)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004220{
Avi Kivity0f65dd72011-04-20 13:37:53 +03004221 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
4222
Carsten Ottebbd9b642007-10-30 18:44:21 +01004223 /* Crossing a page boundary? */
4224 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
4225 int rc, now;
4226
4227 now = -addr & ~PAGE_MASK;
Xiao Guangrong22388a32011-07-13 14:32:31 +08004228 rc = emulator_read_write_onepage(addr, val, now, exception,
4229 vcpu, ops);
4230
Carsten Ottebbd9b642007-10-30 18:44:21 +01004231 if (rc != X86EMUL_CONTINUE)
4232 return rc;
4233 addr += now;
4234 val += now;
4235 bytes -= now;
4236 }
Xiao Guangrong22388a32011-07-13 14:32:31 +08004237
4238 return emulator_read_write_onepage(addr, val, bytes, exception,
4239 vcpu, ops);
4240}
4241
4242static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt,
4243 unsigned long addr,
4244 void *val,
4245 unsigned int bytes,
4246 struct x86_exception *exception)
4247{
4248 return emulator_read_write(ctxt, addr, val, bytes,
4249 exception, &read_emultor);
4250}
4251
4252int emulator_write_emulated(struct x86_emulate_ctxt *ctxt,
4253 unsigned long addr,
4254 const void *val,
4255 unsigned int bytes,
4256 struct x86_exception *exception)
4257{
4258 return emulator_read_write(ctxt, addr, (void *)val, bytes,
4259 exception, &write_emultor);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004260}
Carsten Ottebbd9b642007-10-30 18:44:21 +01004261
Avi Kivitydaea3e72010-03-15 13:59:54 +02004262#define CMPXCHG_TYPE(t, ptr, old, new) \
4263 (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
4264
4265#ifdef CONFIG_X86_64
4266# define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
4267#else
4268# define CMPXCHG64(ptr, old, new) \
Jan Kiszka9749a6c2010-03-20 10:14:13 +01004269 (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old))
Avi Kivitydaea3e72010-03-15 13:59:54 +02004270#endif
4271
Avi Kivity0f65dd72011-04-20 13:37:53 +03004272static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt,
4273 unsigned long addr,
Carsten Ottebbd9b642007-10-30 18:44:21 +01004274 const void *old,
4275 const void *new,
4276 unsigned int bytes,
Avi Kivity0f65dd72011-04-20 13:37:53 +03004277 struct x86_exception *exception)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004278{
Avi Kivity0f65dd72011-04-20 13:37:53 +03004279 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Avi Kivitydaea3e72010-03-15 13:59:54 +02004280 gpa_t gpa;
4281 struct page *page;
4282 char *kaddr;
4283 bool exchanged;
4284
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05004285 /* guests cmpxchg8b have to be emulated atomically */
Avi Kivitydaea3e72010-03-15 13:59:54 +02004286 if (bytes > 8 || (bytes & (bytes - 1)))
4287 goto emul_write;
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05004288
Avi Kivitydaea3e72010-03-15 13:59:54 +02004289 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL);
Marcelo Tosatti10589a42007-12-20 19:18:22 -05004290
Avi Kivitydaea3e72010-03-15 13:59:54 +02004291 if (gpa == UNMAPPED_GVA ||
4292 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
4293 goto emul_write;
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05004294
Avi Kivitydaea3e72010-03-15 13:59:54 +02004295 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
4296 goto emul_write;
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05004297
Avi Kivitydaea3e72010-03-15 13:59:54 +02004298 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
Wei Yongjunc19b8bd2010-07-15 08:51:58 +08004299 if (is_error_page(page)) {
4300 kvm_release_page_clean(page);
4301 goto emul_write;
4302 }
Izik Eidus72dc67a2008-02-10 18:04:15 +02004303
Avi Kivitydaea3e72010-03-15 13:59:54 +02004304 kaddr = kmap_atomic(page, KM_USER0);
4305 kaddr += offset_in_page(gpa);
4306 switch (bytes) {
4307 case 1:
4308 exchanged = CMPXCHG_TYPE(u8, kaddr, old, new);
4309 break;
4310 case 2:
4311 exchanged = CMPXCHG_TYPE(u16, kaddr, old, new);
4312 break;
4313 case 4:
4314 exchanged = CMPXCHG_TYPE(u32, kaddr, old, new);
4315 break;
4316 case 8:
4317 exchanged = CMPXCHG64(kaddr, old, new);
4318 break;
4319 default:
4320 BUG();
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05004321 }
Avi Kivitydaea3e72010-03-15 13:59:54 +02004322 kunmap_atomic(kaddr, KM_USER0);
4323 kvm_release_page_dirty(page);
4324
4325 if (!exchanged)
4326 return X86EMUL_CMPXCHG_FAILED;
4327
Gleb Natapov8f6abd02010-04-13 10:21:56 +03004328 kvm_mmu_pte_write(vcpu, gpa, new, bytes, 1);
4329
4330 return X86EMUL_CONTINUE;
Avi Kivity4a5f48f2010-03-15 13:59:55 +02004331
Marcelo Tosatti3200f402008-03-29 20:17:59 -03004332emul_write:
Avi Kivitydaea3e72010-03-15 13:59:54 +02004333 printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05004334
Avi Kivity0f65dd72011-04-20 13:37:53 +03004335 return emulator_write_emulated(ctxt, addr, new, bytes, exception);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004336}
4337
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004338static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
4339{
4340 /* TODO: String I/O for in kernel device */
4341 int r;
4342
4343 if (vcpu->arch.pio.in)
4344 r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port,
4345 vcpu->arch.pio.size, pd);
4346 else
4347 r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
4348 vcpu->arch.pio.port, vcpu->arch.pio.size,
4349 pd);
4350 return r;
4351}
4352
4353
Avi Kivityca1d4a92011-04-20 13:37:53 +03004354static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt,
4355 int size, unsigned short port, void *val,
4356 unsigned int count)
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004357{
Avi Kivityca1d4a92011-04-20 13:37:53 +03004358 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
4359
Gleb Natapov79729952010-03-18 15:20:24 +02004360 if (vcpu->arch.pio.count)
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004361 goto data_avail;
4362
Avi Kivity61cfab22010-12-13 17:24:53 +02004363 trace_kvm_pio(0, port, size, count);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004364
4365 vcpu->arch.pio.port = port;
4366 vcpu->arch.pio.in = 1;
Gleb Natapov79729952010-03-18 15:20:24 +02004367 vcpu->arch.pio.count = count;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004368 vcpu->arch.pio.size = size;
4369
4370 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
4371 data_avail:
4372 memcpy(val, vcpu->arch.pio_data, size * count);
Gleb Natapov79729952010-03-18 15:20:24 +02004373 vcpu->arch.pio.count = 0;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004374 return 1;
4375 }
4376
4377 vcpu->run->exit_reason = KVM_EXIT_IO;
4378 vcpu->run->io.direction = KVM_EXIT_IO_IN;
4379 vcpu->run->io.size = size;
4380 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
4381 vcpu->run->io.count = count;
4382 vcpu->run->io.port = port;
4383
4384 return 0;
4385}
4386
Avi Kivityca1d4a92011-04-20 13:37:53 +03004387static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt,
4388 int size, unsigned short port,
4389 const void *val, unsigned int count)
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004390{
Avi Kivityca1d4a92011-04-20 13:37:53 +03004391 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
4392
Avi Kivity61cfab22010-12-13 17:24:53 +02004393 trace_kvm_pio(1, port, size, count);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004394
4395 vcpu->arch.pio.port = port;
4396 vcpu->arch.pio.in = 0;
Gleb Natapov79729952010-03-18 15:20:24 +02004397 vcpu->arch.pio.count = count;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004398 vcpu->arch.pio.size = size;
4399
4400 memcpy(vcpu->arch.pio_data, val, size * count);
4401
4402 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
Gleb Natapov79729952010-03-18 15:20:24 +02004403 vcpu->arch.pio.count = 0;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004404 return 1;
4405 }
4406
4407 vcpu->run->exit_reason = KVM_EXIT_IO;
4408 vcpu->run->io.direction = KVM_EXIT_IO_OUT;
4409 vcpu->run->io.size = size;
4410 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
4411 vcpu->run->io.count = count;
4412 vcpu->run->io.port = port;
4413
4414 return 0;
4415}
4416
Carsten Ottebbd9b642007-10-30 18:44:21 +01004417static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
4418{
4419 return kvm_x86_ops->get_segment_base(vcpu, seg);
4420}
4421
Avi Kivity3cb16fe2011-04-20 15:38:44 +03004422static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004423{
Avi Kivity3cb16fe2011-04-20 15:38:44 +03004424 kvm_mmu_invlpg(emul_to_vcpu(ctxt), address);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004425}
4426
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004427int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu)
4428{
4429 if (!need_emulate_wbinvd(vcpu))
4430 return X86EMUL_CONTINUE;
4431
4432 if (kvm_x86_ops->has_wbinvd_exit()) {
Jan Kiszka2eec7342010-11-01 14:01:29 +01004433 int cpu = get_cpu();
4434
4435 cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask);
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004436 smp_call_function_many(vcpu->arch.wbinvd_dirty_mask,
4437 wbinvd_ipi, NULL, 1);
Jan Kiszka2eec7342010-11-01 14:01:29 +01004438 put_cpu();
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004439 cpumask_clear(vcpu->arch.wbinvd_dirty_mask);
Jan Kiszka2eec7342010-11-01 14:01:29 +01004440 } else
4441 wbinvd();
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004442 return X86EMUL_CONTINUE;
4443}
4444EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd);
4445
Avi Kivitybcaf5cc2011-04-20 15:53:23 +03004446static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt)
4447{
4448 kvm_emulate_wbinvd(emul_to_vcpu(ctxt));
4449}
4450
Avi Kivity717746e2011-04-20 13:37:53 +03004451int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004452{
Avi Kivity717746e2011-04-20 13:37:53 +03004453 return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004454}
4455
Avi Kivity717746e2011-04-20 13:37:53 +03004456int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004457{
Gleb Natapov338dbc92010-04-28 19:15:32 +03004458
Avi Kivity717746e2011-04-20 13:37:53 +03004459 return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004460}
4461
Gleb Natapov52a46612010-03-18 15:20:03 +02004462static u64 mk_cr_64(u64 curr_cr, u32 new_val)
4463{
4464 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
4465}
4466
Avi Kivity717746e2011-04-20 13:37:53 +03004467static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr)
Gleb Natapov52a46612010-03-18 15:20:03 +02004468{
Avi Kivity717746e2011-04-20 13:37:53 +03004469 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov52a46612010-03-18 15:20:03 +02004470 unsigned long value;
4471
4472 switch (cr) {
4473 case 0:
4474 value = kvm_read_cr0(vcpu);
4475 break;
4476 case 2:
4477 value = vcpu->arch.cr2;
4478 break;
4479 case 3:
Avi Kivity9f8fe502010-12-05 17:30:00 +02004480 value = kvm_read_cr3(vcpu);
Gleb Natapov52a46612010-03-18 15:20:03 +02004481 break;
4482 case 4:
4483 value = kvm_read_cr4(vcpu);
4484 break;
4485 case 8:
4486 value = kvm_get_cr8(vcpu);
4487 break;
4488 default:
4489 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
4490 return 0;
4491 }
4492
4493 return value;
4494}
4495
Avi Kivity717746e2011-04-20 13:37:53 +03004496static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val)
Gleb Natapov52a46612010-03-18 15:20:03 +02004497{
Avi Kivity717746e2011-04-20 13:37:53 +03004498 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov0f122442010-04-28 19:15:31 +03004499 int res = 0;
4500
Gleb Natapov52a46612010-03-18 15:20:03 +02004501 switch (cr) {
4502 case 0:
Avi Kivity49a9b072010-06-10 17:02:14 +03004503 res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
Gleb Natapov52a46612010-03-18 15:20:03 +02004504 break;
4505 case 2:
4506 vcpu->arch.cr2 = val;
4507 break;
4508 case 3:
Avi Kivity23902182010-06-10 17:02:16 +03004509 res = kvm_set_cr3(vcpu, val);
Gleb Natapov52a46612010-03-18 15:20:03 +02004510 break;
4511 case 4:
Avi Kivitya83b29c2010-06-10 17:02:15 +03004512 res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
Gleb Natapov52a46612010-03-18 15:20:03 +02004513 break;
4514 case 8:
Andre Przywaraeea1cff2010-12-21 11:12:00 +01004515 res = kvm_set_cr8(vcpu, val);
Gleb Natapov52a46612010-03-18 15:20:03 +02004516 break;
4517 default:
4518 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
Gleb Natapov0f122442010-04-28 19:15:31 +03004519 res = -1;
Gleb Natapov52a46612010-03-18 15:20:03 +02004520 }
Gleb Natapov0f122442010-04-28 19:15:31 +03004521
4522 return res;
Gleb Natapov52a46612010-03-18 15:20:03 +02004523}
4524
Avi Kivity717746e2011-04-20 13:37:53 +03004525static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt)
Gleb Natapov9c537242010-03-18 15:20:05 +02004526{
Avi Kivity717746e2011-04-20 13:37:53 +03004527 return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt));
Gleb Natapov9c537242010-03-18 15:20:05 +02004528}
4529
Avi Kivity4bff1e862011-04-20 13:37:53 +03004530static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004531{
Avi Kivity4bff1e862011-04-20 13:37:53 +03004532 kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt);
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004533}
4534
Avi Kivity4bff1e862011-04-20 13:37:53 +03004535static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
Mohammed Gamal160ce1f2010-08-04 05:44:24 +03004536{
Avi Kivity4bff1e862011-04-20 13:37:53 +03004537 kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt);
Mohammed Gamal160ce1f2010-08-04 05:44:24 +03004538}
4539
Avi Kivity1ac9d0c2011-04-20 15:12:00 +03004540static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
4541{
4542 kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt);
4543}
4544
4545static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
4546{
4547 kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt);
4548}
4549
Avi Kivity4bff1e862011-04-20 13:37:53 +03004550static unsigned long emulator_get_cached_segment_base(
4551 struct x86_emulate_ctxt *ctxt, int seg)
Gleb Natapov5951c442010-04-28 19:15:29 +03004552{
Avi Kivity4bff1e862011-04-20 13:37:53 +03004553 return get_segment_base(emul_to_vcpu(ctxt), seg);
Gleb Natapov5951c442010-04-28 19:15:29 +03004554}
4555
Avi Kivity1aa36612011-04-27 13:20:30 +03004556static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector,
4557 struct desc_struct *desc, u32 *base3,
4558 int seg)
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004559{
4560 struct kvm_segment var;
4561
Avi Kivity4bff1e862011-04-20 13:37:53 +03004562 kvm_get_segment(emul_to_vcpu(ctxt), &var, seg);
Avi Kivity1aa36612011-04-27 13:20:30 +03004563 *selector = var.selector;
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004564
4565 if (var.unusable)
4566 return false;
4567
4568 if (var.g)
4569 var.limit >>= 12;
4570 set_desc_limit(desc, var.limit);
4571 set_desc_base(desc, (unsigned long)var.base);
Gleb Natapov5601d052011-03-07 14:55:06 +02004572#ifdef CONFIG_X86_64
4573 if (base3)
4574 *base3 = var.base >> 32;
4575#endif
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004576 desc->type = var.type;
4577 desc->s = var.s;
4578 desc->dpl = var.dpl;
4579 desc->p = var.present;
4580 desc->avl = var.avl;
4581 desc->l = var.l;
4582 desc->d = var.db;
4583 desc->g = var.g;
4584
4585 return true;
4586}
4587
Avi Kivity1aa36612011-04-27 13:20:30 +03004588static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector,
4589 struct desc_struct *desc, u32 base3,
4590 int seg)
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004591{
Avi Kivity4bff1e862011-04-20 13:37:53 +03004592 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004593 struct kvm_segment var;
4594
Avi Kivity1aa36612011-04-27 13:20:30 +03004595 var.selector = selector;
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004596 var.base = get_desc_base(desc);
Gleb Natapov5601d052011-03-07 14:55:06 +02004597#ifdef CONFIG_X86_64
4598 var.base |= ((u64)base3) << 32;
4599#endif
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004600 var.limit = get_desc_limit(desc);
4601 if (desc->g)
4602 var.limit = (var.limit << 12) | 0xfff;
4603 var.type = desc->type;
4604 var.present = desc->p;
4605 var.dpl = desc->dpl;
4606 var.db = desc->d;
4607 var.s = desc->s;
4608 var.l = desc->l;
4609 var.g = desc->g;
4610 var.avl = desc->avl;
4611 var.present = desc->p;
4612 var.unusable = !var.present;
4613 var.padding = 0;
4614
4615 kvm_set_segment(vcpu, &var, seg);
4616 return;
4617}
4618
Avi Kivity717746e2011-04-20 13:37:53 +03004619static int emulator_get_msr(struct x86_emulate_ctxt *ctxt,
4620 u32 msr_index, u64 *pdata)
4621{
4622 return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata);
4623}
4624
4625static int emulator_set_msr(struct x86_emulate_ctxt *ctxt,
4626 u32 msr_index, u64 data)
4627{
4628 return kvm_set_msr(emul_to_vcpu(ctxt), msr_index, data);
4629}
4630
Avi Kivity6c3287f2011-04-20 15:43:05 +03004631static void emulator_halt(struct x86_emulate_ctxt *ctxt)
4632{
4633 emul_to_vcpu(ctxt)->arch.halt_request = 1;
4634}
4635
Avi Kivity5037f6f2011-03-28 16:53:59 +02004636static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt)
4637{
4638 preempt_disable();
Avi Kivity5197b802011-04-20 15:55:40 +03004639 kvm_load_guest_fpu(emul_to_vcpu(ctxt));
Avi Kivity5037f6f2011-03-28 16:53:59 +02004640 /*
4641 * CR0.TS may reference the host fpu state, not the guest fpu state,
4642 * so it may be clear at this point.
4643 */
4644 clts();
4645}
4646
4647static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt)
4648{
4649 preempt_enable();
4650}
4651
Avi Kivity29535382011-04-20 13:37:53 +03004652static int emulator_intercept(struct x86_emulate_ctxt *ctxt,
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02004653 struct x86_instruction_info *info,
Avi Kivityc4f035c2011-04-04 12:39:22 +02004654 enum x86_intercept_stage stage)
4655{
Avi Kivity29535382011-04-20 13:37:53 +03004656 return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage);
Avi Kivityc4f035c2011-04-04 12:39:22 +02004657}
4658
Harvey Harrison14af3f32008-02-19 10:25:50 -08004659static struct x86_emulate_ops emulate_ops = {
Gleb Natapov1871c602010-02-10 14:21:32 +02004660 .read_std = kvm_read_guest_virt_system,
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004661 .write_std = kvm_write_guest_virt_system,
Gleb Natapov1871c602010-02-10 14:21:32 +02004662 .fetch = kvm_fetch_guest_virt,
Carsten Ottebbd9b642007-10-30 18:44:21 +01004663 .read_emulated = emulator_read_emulated,
4664 .write_emulated = emulator_write_emulated,
4665 .cmpxchg_emulated = emulator_cmpxchg_emulated,
Avi Kivity3cb16fe2011-04-20 15:38:44 +03004666 .invlpg = emulator_invlpg,
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004667 .pio_in_emulated = emulator_pio_in_emulated,
4668 .pio_out_emulated = emulator_pio_out_emulated,
Avi Kivity1aa36612011-04-27 13:20:30 +03004669 .get_segment = emulator_get_segment,
4670 .set_segment = emulator_set_segment,
Gleb Natapov5951c442010-04-28 19:15:29 +03004671 .get_cached_segment_base = emulator_get_cached_segment_base,
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004672 .get_gdt = emulator_get_gdt,
Mohammed Gamal160ce1f2010-08-04 05:44:24 +03004673 .get_idt = emulator_get_idt,
Avi Kivity1ac9d0c2011-04-20 15:12:00 +03004674 .set_gdt = emulator_set_gdt,
4675 .set_idt = emulator_set_idt,
Gleb Natapov52a46612010-03-18 15:20:03 +02004676 .get_cr = emulator_get_cr,
4677 .set_cr = emulator_set_cr,
Gleb Natapov9c537242010-03-18 15:20:05 +02004678 .cpl = emulator_get_cpl,
Gleb Natapov35aa5372010-04-28 19:15:27 +03004679 .get_dr = emulator_get_dr,
4680 .set_dr = emulator_set_dr,
Avi Kivity717746e2011-04-20 13:37:53 +03004681 .set_msr = emulator_set_msr,
4682 .get_msr = emulator_get_msr,
Avi Kivity6c3287f2011-04-20 15:43:05 +03004683 .halt = emulator_halt,
Avi Kivitybcaf5cc2011-04-20 15:53:23 +03004684 .wbinvd = emulator_wbinvd,
Avi Kivityd6aa1002011-04-20 15:47:13 +03004685 .fix_hypercall = emulator_fix_hypercall,
Avi Kivity5037f6f2011-03-28 16:53:59 +02004686 .get_fpu = emulator_get_fpu,
4687 .put_fpu = emulator_put_fpu,
Avi Kivityc4f035c2011-04-04 12:39:22 +02004688 .intercept = emulator_intercept,
Carsten Ottebbd9b642007-10-30 18:44:21 +01004689};
4690
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03004691static void cache_all_regs(struct kvm_vcpu *vcpu)
4692{
4693 kvm_register_read(vcpu, VCPU_REGS_RAX);
4694 kvm_register_read(vcpu, VCPU_REGS_RSP);
4695 kvm_register_read(vcpu, VCPU_REGS_RIP);
4696 vcpu->arch.regs_dirty = ~0;
4697}
4698
Gleb Natapov95cb2292010-04-28 19:15:43 +03004699static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask)
4700{
4701 u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask);
4702 /*
4703 * an sti; sti; sequence only disable interrupts for the first
4704 * instruction. So, if the last instruction, be it emulated or
4705 * not, left the system with the INT_STI flag enabled, it
4706 * means that the last instruction is an sti. We should not
4707 * leave the flag on in this case. The same goes for mov ss
4708 */
4709 if (!(int_shadow & mask))
4710 kvm_x86_ops->set_interrupt_shadow(vcpu, mask);
4711}
4712
Gleb Natapov54b84862010-04-28 19:15:44 +03004713static void inject_emulated_exception(struct kvm_vcpu *vcpu)
4714{
4715 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Avi Kivityda9cb572010-11-22 17:53:21 +02004716 if (ctxt->exception.vector == PF_VECTOR)
Avi Kivity6389ee92010-11-29 16:12:30 +02004717 kvm_propagate_fault(vcpu, &ctxt->exception);
Avi Kivityda9cb572010-11-22 17:53:21 +02004718 else if (ctxt->exception.error_code_valid)
4719 kvm_queue_exception_e(vcpu, ctxt->exception.vector,
4720 ctxt->exception.error_code);
Gleb Natapov54b84862010-04-28 19:15:44 +03004721 else
Avi Kivityda9cb572010-11-22 17:53:21 +02004722 kvm_queue_exception(vcpu, ctxt->exception.vector);
Gleb Natapov54b84862010-04-28 19:15:44 +03004723}
4724
Avi Kivity9dac77f2011-06-01 15:34:25 +03004725static void init_decode_cache(struct x86_emulate_ctxt *ctxt,
Takuya Yoshikawab5c9ff72011-05-25 11:09:38 +09004726 const unsigned long *regs)
4727{
Avi Kivity9dac77f2011-06-01 15:34:25 +03004728 memset(&ctxt->twobyte, 0,
4729 (void *)&ctxt->regs - (void *)&ctxt->twobyte);
4730 memcpy(ctxt->regs, regs, sizeof(ctxt->regs));
Takuya Yoshikawab5c9ff72011-05-25 11:09:38 +09004731
Avi Kivity9dac77f2011-06-01 15:34:25 +03004732 ctxt->fetch.start = 0;
4733 ctxt->fetch.end = 0;
4734 ctxt->io_read.pos = 0;
4735 ctxt->io_read.end = 0;
4736 ctxt->mem_read.pos = 0;
4737 ctxt->mem_read.end = 0;
Takuya Yoshikawab5c9ff72011-05-25 11:09:38 +09004738}
4739
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004740static void init_emulate_ctxt(struct kvm_vcpu *vcpu)
4741{
Takuya Yoshikawaadf52232011-05-25 11:06:16 +09004742 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004743 int cs_db, cs_l;
4744
Gleb Natapov2aab2c52011-04-12 12:36:25 +03004745 /*
4746 * TODO: fix emulate.c to use guest_read/write_register
4747 * instead of direct ->regs accesses, can save hundred cycles
4748 * on Intel for instructions that don't read/change RSP, for
4749 * for example.
4750 */
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004751 cache_all_regs(vcpu);
4752
4753 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
4754
Takuya Yoshikawaadf52232011-05-25 11:06:16 +09004755 ctxt->eflags = kvm_get_rflags(vcpu);
4756 ctxt->eip = kvm_rip_read(vcpu);
4757 ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
4758 (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 :
4759 cs_l ? X86EMUL_MODE_PROT64 :
4760 cs_db ? X86EMUL_MODE_PROT32 :
4761 X86EMUL_MODE_PROT16;
4762 ctxt->guest_mode = is_guest_mode(vcpu);
4763
Avi Kivity9dac77f2011-06-01 15:34:25 +03004764 init_decode_cache(ctxt, vcpu->arch.regs);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004765 vcpu->arch.emulate_regs_need_sync_from_vcpu = false;
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004766}
4767
Serge E. Hallyn71f98332011-04-13 09:12:54 -05004768int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip)
Mohammed Gamal63995652010-09-19 14:34:06 +02004769{
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004770 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Mohammed Gamal63995652010-09-19 14:34:06 +02004771 int ret;
4772
4773 init_emulate_ctxt(vcpu);
4774
Avi Kivity9dac77f2011-06-01 15:34:25 +03004775 ctxt->op_bytes = 2;
4776 ctxt->ad_bytes = 2;
4777 ctxt->_eip = ctxt->eip + inc_eip;
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004778 ret = emulate_int_real(ctxt, irq);
Mohammed Gamal63995652010-09-19 14:34:06 +02004779
4780 if (ret != X86EMUL_CONTINUE)
4781 return EMULATE_FAIL;
4782
Avi Kivity9dac77f2011-06-01 15:34:25 +03004783 ctxt->eip = ctxt->_eip;
4784 memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs);
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004785 kvm_rip_write(vcpu, ctxt->eip);
4786 kvm_set_rflags(vcpu, ctxt->eflags);
Mohammed Gamal63995652010-09-19 14:34:06 +02004787
4788 if (irq == NMI_VECTOR)
Avi Kivity7460fb4a2011-09-20 13:43:14 +03004789 vcpu->arch.nmi_pending = 0;
Mohammed Gamal63995652010-09-19 14:34:06 +02004790 else
4791 vcpu->arch.interrupt.pending = false;
4792
4793 return EMULATE_DONE;
4794}
4795EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt);
4796
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004797static int handle_emulation_failure(struct kvm_vcpu *vcpu)
4798{
Joerg Roedelfc3a9152010-11-29 17:51:49 +01004799 int r = EMULATE_DONE;
4800
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004801 ++vcpu->stat.insn_emulation_fail;
4802 trace_kvm_emulate_insn_failed(vcpu);
Joerg Roedelfc3a9152010-11-29 17:51:49 +01004803 if (!is_guest_mode(vcpu)) {
4804 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
4805 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
4806 vcpu->run->internal.ndata = 0;
4807 r = EMULATE_FAIL;
4808 }
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004809 kvm_queue_exception(vcpu, UD_VECTOR);
Joerg Roedelfc3a9152010-11-29 17:51:49 +01004810
4811 return r;
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004812}
4813
Gleb Natapova6f177e2010-07-08 12:41:12 +03004814static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva)
4815{
4816 gpa_t gpa;
4817
Gleb Natapov68be0802010-07-14 19:05:45 +03004818 if (tdp_enabled)
4819 return false;
4820
Gleb Natapova6f177e2010-07-08 12:41:12 +03004821 /*
4822 * if emulation was due to access to shadowed page table
4823 * and it failed try to unshadow page and re-entetr the
4824 * guest to let CPU execute the instruction.
4825 */
4826 if (kvm_mmu_unprotect_page_virt(vcpu, gva))
4827 return true;
4828
4829 gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL);
4830
4831 if (gpa == UNMAPPED_GVA)
4832 return true; /* let cpu generate fault */
4833
4834 if (!kvm_is_error_hva(gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT)))
4835 return true;
4836
4837 return false;
4838}
4839
Andre Przywara51d8b662010-12-21 11:12:02 +01004840int x86_emulate_instruction(struct kvm_vcpu *vcpu,
4841 unsigned long cr2,
Andre Przywaradc25e892010-12-21 11:12:07 +01004842 int emulation_type,
4843 void *insn,
4844 int insn_len)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004845{
Gleb Natapov95cb2292010-04-28 19:15:43 +03004846 int r;
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004847 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004848 bool writeback = true;
Carsten Ottebbd9b642007-10-30 18:44:21 +01004849
Avi Kivity26eef702008-07-03 14:59:22 +03004850 kvm_clear_exception_queue(vcpu);
Gleb Natapov8d7d8102011-04-12 12:36:21 +03004851
Sheng Yang571008d2008-01-02 14:49:22 +08004852 if (!(emulation_type & EMULTYPE_NO_DECODE)) {
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004853 init_emulate_ctxt(vcpu);
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004854 ctxt->interruptibility = 0;
4855 ctxt->have_exception = false;
4856 ctxt->perm_ok = false;
Carsten Ottebbd9b642007-10-30 18:44:21 +01004857
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004858 ctxt->only_vendor_specific_insn
Avi Kivity40059962011-02-01 16:32:04 +02004859 = emulation_type & EMULTYPE_TRAP_UD;
4860
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004861 r = x86_decode_insn(ctxt, insn, insn_len);
Joerg Roedeld47f00a2010-09-10 17:30:56 +02004862
Avi Kivitye46479f2010-04-11 13:05:16 +03004863 trace_kvm_emulate_insn_start(vcpu);
Avi Kivityf2b57562007-11-18 15:17:51 +02004864 ++vcpu->stat.insn_emulation;
Takuya Yoshikawa1d2887e2011-07-30 18:03:34 +09004865 if (r != EMULATION_OK) {
Avi Kivity40059962011-02-01 16:32:04 +02004866 if (emulation_type & EMULTYPE_TRAP_UD)
4867 return EMULATE_FAIL;
Gleb Natapova6f177e2010-07-08 12:41:12 +03004868 if (reexecute_instruction(vcpu, cr2))
Carsten Ottebbd9b642007-10-30 18:44:21 +01004869 return EMULATE_DONE;
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004870 if (emulation_type & EMULTYPE_SKIP)
4871 return EMULATE_FAIL;
4872 return handle_emulation_failure(vcpu);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004873 }
4874 }
4875
Gleb Natapovba8afb62009-04-12 13:36:57 +03004876 if (emulation_type & EMULTYPE_SKIP) {
Avi Kivity9dac77f2011-06-01 15:34:25 +03004877 kvm_rip_write(vcpu, ctxt->_eip);
Gleb Natapovba8afb62009-04-12 13:36:57 +03004878 return EMULATE_DONE;
4879 }
4880
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004881 /* this is needed for vmware backdoor interface to work since it
Gleb Natapov4d2179e2010-04-28 19:15:42 +03004882 changes registers values during IO operation */
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004883 if (vcpu->arch.emulate_regs_need_sync_from_vcpu) {
4884 vcpu->arch.emulate_regs_need_sync_from_vcpu = false;
Avi Kivity9dac77f2011-06-01 15:34:25 +03004885 memcpy(ctxt->regs, vcpu->arch.regs, sizeof ctxt->regs);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004886 }
Gleb Natapov4d2179e2010-04-28 19:15:42 +03004887
Gleb Natapov5cd21912010-03-18 15:20:26 +02004888restart:
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004889 r = x86_emulate_insn(ctxt);
Gleb Natapovc3cd7ff2010-04-28 19:15:35 +03004890
Joerg Roedel775fde82011-04-04 12:39:24 +02004891 if (r == EMULATION_INTERCEPTED)
4892 return EMULATE_DONE;
4893
Gleb Natapovd2ddd1c2010-08-25 12:47:43 +03004894 if (r == EMULATION_FAILED) {
Gleb Natapova6f177e2010-07-08 12:41:12 +03004895 if (reexecute_instruction(vcpu, cr2))
Gleb Natapovc3cd7ff2010-04-28 19:15:35 +03004896 return EMULATE_DONE;
4897
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004898 return handle_emulation_failure(vcpu);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004899 }
4900
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004901 if (ctxt->have_exception) {
Gleb Natapove85d28f2010-07-29 15:11:52 +03004902 inject_emulated_exception(vcpu);
Gleb Natapovd2ddd1c2010-08-25 12:47:43 +03004903 r = EMULATE_DONE;
4904 } else if (vcpu->arch.pio.count) {
Gleb Natapove85d28f2010-07-29 15:11:52 +03004905 if (!vcpu->arch.pio.in)
4906 vcpu->arch.pio.count = 0;
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004907 else
4908 writeback = false;
Gleb Natapove85d28f2010-07-29 15:11:52 +03004909 r = EMULATE_DO_MMIO;
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004910 } else if (vcpu->mmio_needed) {
4911 if (!vcpu->mmio_is_write)
4912 writeback = false;
Gleb Natapove85d28f2010-07-29 15:11:52 +03004913 r = EMULATE_DO_MMIO;
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004914 } else if (r == EMULATION_RESTART)
Gleb Natapove85d28f2010-07-29 15:11:52 +03004915 goto restart;
Gleb Natapovd2ddd1c2010-08-25 12:47:43 +03004916 else
4917 r = EMULATE_DONE;
Gleb Natapove85d28f2010-07-29 15:11:52 +03004918
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004919 if (writeback) {
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004920 toggle_interruptibility(vcpu, ctxt->interruptibility);
4921 kvm_set_rflags(vcpu, ctxt->eflags);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004922 kvm_make_request(KVM_REQ_EVENT, vcpu);
Avi Kivity9dac77f2011-06-01 15:34:25 +03004923 memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004924 vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004925 kvm_rip_write(vcpu, ctxt->eip);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004926 } else
4927 vcpu->arch.emulate_regs_need_sync_to_vcpu = true;
Gleb Natapov3457e412010-04-28 19:15:38 +03004928
Gleb Natapove85d28f2010-07-29 15:11:52 +03004929 return r;
Carsten Ottebbd9b642007-10-30 18:44:21 +01004930}
Andre Przywara51d8b662010-12-21 11:12:02 +01004931EXPORT_SYMBOL_GPL(x86_emulate_instruction);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004932
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004933int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
Carsten Ottede7d7892007-10-30 18:44:25 +01004934{
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004935 unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX);
Avi Kivityca1d4a92011-04-20 13:37:53 +03004936 int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt,
4937 size, port, &val, 1);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004938 /* do not return to emulator after return from userspace */
Gleb Natapov79729952010-03-18 15:20:24 +02004939 vcpu->arch.pio.count = 0;
Izik Eidus0f346072008-12-29 01:42:20 +02004940 return ret;
Carsten Ottede7d7892007-10-30 18:44:25 +01004941}
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004942EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
Carsten Ottede7d7892007-10-30 18:44:25 +01004943
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004944static void tsc_bad(void *info)
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004945{
Tejun Heo0a3aee02010-12-18 16:28:55 +01004946 __this_cpu_write(cpu_tsc_khz, 0);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004947}
4948
4949static void tsc_khz_changed(void *data)
4950{
4951 struct cpufreq_freqs *freq = data;
4952 unsigned long khz = 0;
4953
4954 if (data)
4955 khz = freq->new;
4956 else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
4957 khz = cpufreq_quick_get(raw_smp_processor_id());
4958 if (!khz)
4959 khz = tsc_khz;
Tejun Heo0a3aee02010-12-18 16:28:55 +01004960 __this_cpu_write(cpu_tsc_khz, khz);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004961}
4962
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004963static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
4964 void *data)
4965{
4966 struct cpufreq_freqs *freq = data;
4967 struct kvm *kvm;
4968 struct kvm_vcpu *vcpu;
4969 int i, send_ipi = 0;
4970
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004971 /*
4972 * We allow guests to temporarily run on slowing clocks,
4973 * provided we notify them after, or to run on accelerating
4974 * clocks, provided we notify them before. Thus time never
4975 * goes backwards.
4976 *
4977 * However, we have a problem. We can't atomically update
4978 * the frequency of a given CPU from this function; it is
4979 * merely a notifier, which can be called from any CPU.
4980 * Changing the TSC frequency at arbitrary points in time
4981 * requires a recomputation of local variables related to
4982 * the TSC for each VCPU. We must flag these local variables
4983 * to be updated and be sure the update takes place with the
4984 * new frequency before any guests proceed.
4985 *
4986 * Unfortunately, the combination of hotplug CPU and frequency
4987 * change creates an intractable locking scenario; the order
4988 * of when these callouts happen is undefined with respect to
4989 * CPU hotplug, and they can race with each other. As such,
4990 * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is
4991 * undefined; you can actually have a CPU frequency change take
4992 * place in between the computation of X and the setting of the
4993 * variable. To protect against this problem, all updates of
4994 * the per_cpu tsc_khz variable are done in an interrupt
4995 * protected IPI, and all callers wishing to update the value
4996 * must wait for a synchronous IPI to complete (which is trivial
4997 * if the caller is on the CPU already). This establishes the
4998 * necessary total order on variable updates.
4999 *
5000 * Note that because a guest time update may take place
5001 * anytime after the setting of the VCPU's request bit, the
5002 * correct TSC value must be set before the request. However,
5003 * to ensure the update actually makes it to any guest which
5004 * starts running in hardware virtualization between the set
5005 * and the acquisition of the spinlock, we must also ping the
5006 * CPU after setting the request bit.
5007 *
5008 */
5009
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005010 if (val == CPUFREQ_PRECHANGE && freq->old > freq->new)
5011 return 0;
5012 if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new)
5013 return 0;
Zachary Amsden8cfdc002010-08-19 22:07:21 -10005014
5015 smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005016
Jan Kiszkae935b832011-02-08 12:55:33 +01005017 raw_spin_lock(&kvm_lock);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005018 list_for_each_entry(kvm, &vm_list, vm_list) {
Gleb Natapov988a2ca2009-06-09 15:56:29 +03005019 kvm_for_each_vcpu(i, vcpu, kvm) {
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005020 if (vcpu->cpu != freq->cpu)
5021 continue;
Zachary Amsdenc2855452010-09-18 14:38:15 -10005022 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005023 if (vcpu->cpu != smp_processor_id())
Zachary Amsden8cfdc002010-08-19 22:07:21 -10005024 send_ipi = 1;
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005025 }
5026 }
Jan Kiszkae935b832011-02-08 12:55:33 +01005027 raw_spin_unlock(&kvm_lock);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005028
5029 if (freq->old < freq->new && send_ipi) {
5030 /*
5031 * We upscale the frequency. Must make the guest
5032 * doesn't see old kvmclock values while running with
5033 * the new frequency, otherwise we risk the guest sees
5034 * time go backwards.
5035 *
5036 * In case we update the frequency for another cpu
5037 * (which might be in guest context) send an interrupt
5038 * to kick the cpu out of guest context. Next time
5039 * guest context is entered kvmclock will be updated,
5040 * so the guest will not see stale values.
5041 */
Zachary Amsden8cfdc002010-08-19 22:07:21 -10005042 smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005043 }
5044 return 0;
5045}
5046
5047static struct notifier_block kvmclock_cpufreq_notifier_block = {
Zachary Amsden8cfdc002010-08-19 22:07:21 -10005048 .notifier_call = kvmclock_cpufreq_notifier
5049};
5050
5051static int kvmclock_cpu_notifier(struct notifier_block *nfb,
5052 unsigned long action, void *hcpu)
5053{
5054 unsigned int cpu = (unsigned long)hcpu;
5055
5056 switch (action) {
5057 case CPU_ONLINE:
5058 case CPU_DOWN_FAILED:
5059 smp_call_function_single(cpu, tsc_khz_changed, NULL, 1);
5060 break;
5061 case CPU_DOWN_PREPARE:
5062 smp_call_function_single(cpu, tsc_bad, NULL, 1);
5063 break;
5064 }
5065 return NOTIFY_OK;
5066}
5067
5068static struct notifier_block kvmclock_cpu_notifier_block = {
5069 .notifier_call = kvmclock_cpu_notifier,
5070 .priority = -INT_MAX
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005071};
5072
Zachary Amsdenb820cc02009-09-29 11:38:34 -10005073static void kvm_timer_init(void)
5074{
5075 int cpu;
5076
Zachary Amsdenc2855452010-09-18 14:38:15 -10005077 max_tsc_khz = tsc_khz;
Zachary Amsden8cfdc002010-08-19 22:07:21 -10005078 register_hotcpu_notifier(&kvmclock_cpu_notifier_block);
Zachary Amsdenb820cc02009-09-29 11:38:34 -10005079 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
Zachary Amsdenc2855452010-09-18 14:38:15 -10005080#ifdef CONFIG_CPU_FREQ
5081 struct cpufreq_policy policy;
5082 memset(&policy, 0, sizeof(policy));
Avi Kivity3e26f232010-12-16 12:16:34 +02005083 cpu = get_cpu();
5084 cpufreq_get_policy(&policy, cpu);
Zachary Amsdenc2855452010-09-18 14:38:15 -10005085 if (policy.cpuinfo.max_freq)
5086 max_tsc_khz = policy.cpuinfo.max_freq;
Avi Kivity3e26f232010-12-16 12:16:34 +02005087 put_cpu();
Zachary Amsdenc2855452010-09-18 14:38:15 -10005088#endif
Zachary Amsdenb820cc02009-09-29 11:38:34 -10005089 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,
5090 CPUFREQ_TRANSITION_NOTIFIER);
5091 }
Zachary Amsdenc2855452010-09-18 14:38:15 -10005092 pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10005093 for_each_online_cpu(cpu)
5094 smp_call_function_single(cpu, tsc_khz_changed, NULL, 1);
Zachary Amsdenb820cc02009-09-29 11:38:34 -10005095}
5096
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08005097static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
5098
5099static int kvm_is_in_guest(void)
5100{
5101 return percpu_read(current_vcpu) != NULL;
5102}
5103
5104static int kvm_is_user_mode(void)
5105{
5106 int user_mode = 3;
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08005107
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08005108 if (percpu_read(current_vcpu))
5109 user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu));
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08005110
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08005111 return user_mode != 0;
5112}
5113
5114static unsigned long kvm_get_guest_ip(void)
5115{
5116 unsigned long ip = 0;
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08005117
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08005118 if (percpu_read(current_vcpu))
5119 ip = kvm_rip_read(percpu_read(current_vcpu));
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08005120
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08005121 return ip;
5122}
5123
5124static struct perf_guest_info_callbacks kvm_guest_cbs = {
5125 .is_in_guest = kvm_is_in_guest,
5126 .is_user_mode = kvm_is_user_mode,
5127 .get_guest_ip = kvm_get_guest_ip,
5128};
5129
5130void kvm_before_handle_nmi(struct kvm_vcpu *vcpu)
5131{
5132 percpu_write(current_vcpu, vcpu);
5133}
5134EXPORT_SYMBOL_GPL(kvm_before_handle_nmi);
5135
5136void kvm_after_handle_nmi(struct kvm_vcpu *vcpu)
5137{
5138 percpu_write(current_vcpu, NULL);
5139}
5140EXPORT_SYMBOL_GPL(kvm_after_handle_nmi);
5141
Xiao Guangrongce88dec2011-07-12 03:33:44 +08005142static void kvm_set_mmio_spte_mask(void)
5143{
5144 u64 mask;
5145 int maxphyaddr = boot_cpu_data.x86_phys_bits;
5146
5147 /*
5148 * Set the reserved bits and the present bit of an paging-structure
5149 * entry to generate page fault with PFER.RSV = 1.
5150 */
5151 mask = ((1ull << (62 - maxphyaddr + 1)) - 1) << maxphyaddr;
5152 mask |= 1ull;
5153
5154#ifdef CONFIG_X86_64
5155 /*
5156 * If reserved bit is not supported, clear the present bit to disable
5157 * mmio page fault.
5158 */
5159 if (maxphyaddr == 52)
5160 mask &= ~1ull;
5161#endif
5162
5163 kvm_mmu_set_mmio_spte_mask(mask);
5164}
5165
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005166int kvm_arch_init(void *opaque)
Carsten Otte043405e2007-10-10 17:16:19 +02005167{
Zachary Amsdenb820cc02009-09-29 11:38:34 -10005168 int r;
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005169 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
5170
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005171 if (kvm_x86_ops) {
5172 printk(KERN_ERR "kvm: already loaded the other module\n");
Zhang Xiantao56c6d282007-11-18 20:43:21 +08005173 r = -EEXIST;
5174 goto out;
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005175 }
5176
5177 if (!ops->cpu_has_kvm_support()) {
5178 printk(KERN_ERR "kvm: no hardware support\n");
Zhang Xiantao56c6d282007-11-18 20:43:21 +08005179 r = -EOPNOTSUPP;
5180 goto out;
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005181 }
5182 if (ops->disabled_by_bios()) {
5183 printk(KERN_ERR "kvm: disabled by bios\n");
Zhang Xiantao56c6d282007-11-18 20:43:21 +08005184 r = -EOPNOTSUPP;
5185 goto out;
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005186 }
5187
Avi Kivity97db56c2008-01-13 13:23:56 +02005188 r = kvm_mmu_module_init();
5189 if (r)
5190 goto out;
5191
Xiao Guangrongce88dec2011-07-12 03:33:44 +08005192 kvm_set_mmio_spte_mask();
Avi Kivity97db56c2008-01-13 13:23:56 +02005193 kvm_init_msr_list();
5194
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005195 kvm_x86_ops = ops;
Sheng Yang7b523452008-04-25 21:13:50 +08005196 kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08005197 PT_DIRTY_MASK, PT64_NX_MASK, 0);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005198
Zachary Amsdenb820cc02009-09-29 11:38:34 -10005199 kvm_timer_init();
Gerd Hoffmannc8076602009-02-04 17:52:04 +01005200
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08005201 perf_register_guest_info_callbacks(&kvm_guest_cbs);
5202
Dexuan Cui2acf9232010-06-10 11:27:12 +08005203 if (cpu_has_xsave)
5204 host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
5205
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005206 return 0;
Zhang Xiantao56c6d282007-11-18 20:43:21 +08005207
5208out:
Zhang Xiantao56c6d282007-11-18 20:43:21 +08005209 return r;
Carsten Otte043405e2007-10-10 17:16:19 +02005210}
Hollis Blanchard8776e512007-10-31 17:24:24 -05005211
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005212void kvm_arch_exit(void)
5213{
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08005214 perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
5215
Jan Kiszka888d2562009-04-17 19:24:58 +02005216 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
5217 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
5218 CPUFREQ_TRANSITION_NOTIFIER);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10005219 unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block);
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005220 kvm_x86_ops = NULL;
Zhang Xiantao56c6d282007-11-18 20:43:21 +08005221 kvm_mmu_module_exit();
5222}
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08005223
Hollis Blanchard8776e512007-10-31 17:24:24 -05005224int kvm_emulate_halt(struct kvm_vcpu *vcpu)
5225{
5226 ++vcpu->stat.halt_exits;
5227 if (irqchip_in_kernel(vcpu->kvm)) {
Avi Kivitya4535292008-04-13 17:54:35 +03005228 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
Hollis Blanchard8776e512007-10-31 17:24:24 -05005229 return 1;
5230 } else {
5231 vcpu->run->exit_reason = KVM_EXIT_HLT;
5232 return 0;
5233 }
5234}
5235EXPORT_SYMBOL_GPL(kvm_emulate_halt);
5236
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -05005237static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0,
5238 unsigned long a1)
5239{
5240 if (is_long_mode(vcpu))
5241 return a0;
5242 else
5243 return a0 | ((gpa_t)a1 << 32);
5244}
5245
Gleb Natapov55cd8e52010-01-17 15:51:22 +02005246int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
5247{
5248 u64 param, ingpa, outgpa, ret;
5249 uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
5250 bool fast, longmode;
5251 int cs_db, cs_l;
5252
5253 /*
5254 * hypercall generates UD from non zero cpl and real mode
5255 * per HYPER-V spec
5256 */
Avi Kivity3eeb3282010-01-21 15:31:48 +02005257 if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
Gleb Natapov55cd8e52010-01-17 15:51:22 +02005258 kvm_queue_exception(vcpu, UD_VECTOR);
5259 return 0;
5260 }
5261
5262 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
5263 longmode = is_long_mode(vcpu) && cs_l == 1;
5264
5265 if (!longmode) {
Gleb Natapovccd46932010-01-19 15:06:38 +02005266 param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
5267 (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
5268 ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
5269 (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
5270 outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
5271 (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
Gleb Natapov55cd8e52010-01-17 15:51:22 +02005272 }
5273#ifdef CONFIG_X86_64
5274 else {
5275 param = kvm_register_read(vcpu, VCPU_REGS_RCX);
5276 ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
5277 outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
5278 }
5279#endif
5280
5281 code = param & 0xffff;
5282 fast = (param >> 16) & 0x1;
5283 rep_cnt = (param >> 32) & 0xfff;
5284 rep_idx = (param >> 48) & 0xfff;
5285
5286 trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
5287
Gleb Natapovc25bc162010-01-17 15:51:24 +02005288 switch (code) {
5289 case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
5290 kvm_vcpu_on_spin(vcpu);
5291 break;
5292 default:
5293 res = HV_STATUS_INVALID_HYPERCALL_CODE;
5294 break;
5295 }
Gleb Natapov55cd8e52010-01-17 15:51:22 +02005296
5297 ret = res | (((u64)rep_done & 0xfff) << 32);
5298 if (longmode) {
5299 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
5300 } else {
5301 kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
5302 kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
5303 }
5304
5305 return 1;
5306}
5307
Hollis Blanchard8776e512007-10-31 17:24:24 -05005308int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
5309{
5310 unsigned long nr, a0, a1, a2, a3, ret;
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -05005311 int r = 1;
Hollis Blanchard8776e512007-10-31 17:24:24 -05005312
Gleb Natapov55cd8e52010-01-17 15:51:22 +02005313 if (kvm_hv_hypercall_enabled(vcpu->kvm))
5314 return kvm_hv_hypercall(vcpu);
5315
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005316 nr = kvm_register_read(vcpu, VCPU_REGS_RAX);
5317 a0 = kvm_register_read(vcpu, VCPU_REGS_RBX);
5318 a1 = kvm_register_read(vcpu, VCPU_REGS_RCX);
5319 a2 = kvm_register_read(vcpu, VCPU_REGS_RDX);
5320 a3 = kvm_register_read(vcpu, VCPU_REGS_RSI);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005321
Marcelo Tosatti229456f2009-06-17 09:22:14 -03005322 trace_kvm_hypercall(nr, a0, a1, a2, a3);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04005323
Hollis Blanchard8776e512007-10-31 17:24:24 -05005324 if (!is_long_mode(vcpu)) {
5325 nr &= 0xFFFFFFFF;
5326 a0 &= 0xFFFFFFFF;
5327 a1 &= 0xFFFFFFFF;
5328 a2 &= 0xFFFFFFFF;
5329 a3 &= 0xFFFFFFFF;
5330 }
5331
Jan Kiszka07708c42009-08-03 18:43:28 +02005332 if (kvm_x86_ops->get_cpl(vcpu) != 0) {
5333 ret = -KVM_EPERM;
5334 goto out;
5335 }
5336
Hollis Blanchard8776e512007-10-31 17:24:24 -05005337 switch (nr) {
Avi Kivityb93463a2007-10-25 16:52:32 +02005338 case KVM_HC_VAPIC_POLL_IRQ:
5339 ret = 0;
5340 break;
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -05005341 case KVM_HC_MMU_OP:
5342 r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret);
5343 break;
Hollis Blanchard8776e512007-10-31 17:24:24 -05005344 default:
5345 ret = -KVM_ENOSYS;
5346 break;
5347 }
Jan Kiszka07708c42009-08-03 18:43:28 +02005348out:
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005349 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
Amit Shahf11c3a82008-02-21 01:00:30 +05305350 ++vcpu->stat.hypercalls;
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -05005351 return r;
Hollis Blanchard8776e512007-10-31 17:24:24 -05005352}
5353EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
5354
Avi Kivityd6aa1002011-04-20 15:47:13 +03005355int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt)
Hollis Blanchard8776e512007-10-31 17:24:24 -05005356{
Avi Kivityd6aa1002011-04-20 15:47:13 +03005357 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005358 char instruction[3];
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005359 unsigned long rip = kvm_rip_read(vcpu);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005360
Hollis Blanchard8776e512007-10-31 17:24:24 -05005361 /*
5362 * Blow out the MMU to ensure that no other VCPU has an active mapping
5363 * to ensure that the updated hypercall appears atomically across all
5364 * VCPUs.
5365 */
5366 kvm_mmu_zap_all(vcpu->kvm);
5367
Hollis Blanchard8776e512007-10-31 17:24:24 -05005368 kvm_x86_ops->patch_hypercall(vcpu, instruction);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005369
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09005370 return emulator_write_emulated(ctxt, rip, instruction, 3, NULL);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005371}
5372
Dan Kenigsberg07716712007-11-21 17:10:04 +02005373static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
5374{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08005375 struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];
5376 int j, nent = vcpu->arch.cpuid_nent;
Dan Kenigsberg07716712007-11-21 17:10:04 +02005377
5378 e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT;
5379 /* when no next entry is found, the current entry[i] is reselected */
Nitin A Kamble0fdf8e52008-11-05 15:56:21 -08005380 for (j = i + 1; ; j = (j + 1) % nent) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08005381 struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j];
Dan Kenigsberg07716712007-11-21 17:10:04 +02005382 if (ej->function == e->function) {
5383 ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
5384 return j;
5385 }
5386 }
5387 return 0; /* silence gcc, even though control never reaches here */
5388}
5389
5390/* find an entry with matching function, matching index (if needed), and that
5391 * should be read next (if it's stateful) */
5392static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e,
5393 u32 function, u32 index)
5394{
5395 if (e->function != function)
5396 return 0;
5397 if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index)
5398 return 0;
5399 if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) &&
Amit Shah19355472009-01-14 16:56:00 +00005400 !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT))
Dan Kenigsberg07716712007-11-21 17:10:04 +02005401 return 0;
5402 return 1;
5403}
5404
Alexander Grafd8017472008-11-25 20:17:11 +01005405struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
5406 u32 function, u32 index)
Hollis Blanchard8776e512007-10-31 17:24:24 -05005407{
5408 int i;
Alexander Grafd8017472008-11-25 20:17:11 +01005409 struct kvm_cpuid_entry2 *best = NULL;
Hollis Blanchard8776e512007-10-31 17:24:24 -05005410
Zhang Xiantaoad312c72007-12-13 23:50:52 +08005411 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
Alexander Grafd8017472008-11-25 20:17:11 +01005412 struct kvm_cpuid_entry2 *e;
5413
Zhang Xiantaoad312c72007-12-13 23:50:52 +08005414 e = &vcpu->arch.cpuid_entries[i];
Dan Kenigsberg07716712007-11-21 17:10:04 +02005415 if (is_matching_cpuid_entry(e, function, index)) {
5416 if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC)
5417 move_to_next_stateful_cpuid_entry(vcpu, i);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005418 best = e;
5419 break;
5420 }
Hollis Blanchard8776e512007-10-31 17:24:24 -05005421 }
Alexander Grafd8017472008-11-25 20:17:11 +01005422 return best;
5423}
Sheng Yang0e851882009-12-18 16:48:46 +08005424EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry);
Alexander Grafd8017472008-11-25 20:17:11 +01005425
Dong, Eddie82725b22009-03-30 16:21:08 +08005426int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
5427{
5428 struct kvm_cpuid_entry2 *best;
5429
Avi Kivityf7a71192010-04-11 15:33:32 +03005430 best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0);
5431 if (!best || best->eax < 0x80000008)
5432 goto not_found;
Dong, Eddie82725b22009-03-30 16:21:08 +08005433 best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
5434 if (best)
5435 return best->eax & 0xff;
Avi Kivityf7a71192010-04-11 15:33:32 +03005436not_found:
Dong, Eddie82725b22009-03-30 16:21:08 +08005437 return 36;
5438}
5439
Andre Przywarabd22f5c2011-03-31 16:58:49 +02005440/*
5441 * If no match is found, check whether we exceed the vCPU's limit
5442 * and return the content of the highest valid _standard_ leaf instead.
5443 * This is to satisfy the CPUID specification.
5444 */
5445static struct kvm_cpuid_entry2* check_cpuid_limit(struct kvm_vcpu *vcpu,
5446 u32 function, u32 index)
5447{
5448 struct kvm_cpuid_entry2 *maxlevel;
5449
5450 maxlevel = kvm_find_cpuid_entry(vcpu, function & 0x80000000, 0);
5451 if (!maxlevel || maxlevel->eax >= function)
5452 return NULL;
5453 if (function & 0x80000000) {
5454 maxlevel = kvm_find_cpuid_entry(vcpu, 0, 0);
5455 if (!maxlevel)
5456 return NULL;
5457 }
5458 return kvm_find_cpuid_entry(vcpu, maxlevel->eax, index);
5459}
5460
Alexander Grafd8017472008-11-25 20:17:11 +01005461void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
5462{
5463 u32 function, index;
5464 struct kvm_cpuid_entry2 *best;
5465
5466 function = kvm_register_read(vcpu, VCPU_REGS_RAX);
5467 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
5468 kvm_register_write(vcpu, VCPU_REGS_RAX, 0);
5469 kvm_register_write(vcpu, VCPU_REGS_RBX, 0);
5470 kvm_register_write(vcpu, VCPU_REGS_RCX, 0);
5471 kvm_register_write(vcpu, VCPU_REGS_RDX, 0);
5472 best = kvm_find_cpuid_entry(vcpu, function, index);
Andre Przywarabd22f5c2011-03-31 16:58:49 +02005473
5474 if (!best)
5475 best = check_cpuid_limit(vcpu, function, index);
5476
Hollis Blanchard8776e512007-10-31 17:24:24 -05005477 if (best) {
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005478 kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax);
5479 kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx);
5480 kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx);
5481 kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005482 }
Hollis Blanchard8776e512007-10-31 17:24:24 -05005483 kvm_x86_ops->skip_emulated_instruction(vcpu);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03005484 trace_kvm_cpuid(function,
5485 kvm_register_read(vcpu, VCPU_REGS_RAX),
5486 kvm_register_read(vcpu, VCPU_REGS_RBX),
5487 kvm_register_read(vcpu, VCPU_REGS_RCX),
5488 kvm_register_read(vcpu, VCPU_REGS_RDX));
Hollis Blanchard8776e512007-10-31 17:24:24 -05005489}
5490EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
Hollis Blanchardd0752062007-10-31 17:24:25 -05005491
5492/*
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005493 * Check if userspace requested an interrupt window, and that the
5494 * interrupt window is open.
5495 *
5496 * No need to exit to userspace if we already have an interrupt queued.
5497 */
Avi Kivity851ba692009-08-24 11:10:17 +03005498static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005499{
Gleb Natapov80618232009-04-21 17:44:56 +03005500 return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) &&
Avi Kivity851ba692009-08-24 11:10:17 +03005501 vcpu->run->request_interrupt_window &&
Gleb Natapov5df56642009-04-21 17:44:59 +03005502 kvm_arch_interrupt_allowed(vcpu));
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005503}
5504
Avi Kivity851ba692009-08-24 11:10:17 +03005505static void post_kvm_run_save(struct kvm_vcpu *vcpu)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005506{
Avi Kivity851ba692009-08-24 11:10:17 +03005507 struct kvm_run *kvm_run = vcpu->run;
5508
Jan Kiszka91586a32009-10-05 13:07:21 +02005509 kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02005510 kvm_run->cr8 = kvm_get_cr8(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005511 kvm_run->apic_base = kvm_get_apic_base(vcpu);
Jan Kiszka45312202008-12-11 16:54:54 +01005512 if (irqchip_in_kernel(vcpu->kvm))
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005513 kvm_run->ready_for_interrupt_injection = 1;
Jan Kiszka45312202008-12-11 16:54:54 +01005514 else
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005515 kvm_run->ready_for_interrupt_injection =
Gleb Natapovfa9726b2009-05-11 13:35:47 +03005516 kvm_arch_interrupt_allowed(vcpu) &&
5517 !kvm_cpu_has_interrupt(vcpu) &&
5518 !kvm_event_needs_reinjection(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005519}
5520
Avi Kivityb93463a2007-10-25 16:52:32 +02005521static void vapic_enter(struct kvm_vcpu *vcpu)
5522{
5523 struct kvm_lapic *apic = vcpu->arch.apic;
5524 struct page *page;
5525
5526 if (!apic || !apic->vapic_addr)
5527 return;
5528
5529 page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
Izik Eidus72dc67a2008-02-10 18:04:15 +02005530
5531 vcpu->arch.apic->vapic_page = page;
Avi Kivityb93463a2007-10-25 16:52:32 +02005532}
5533
5534static void vapic_exit(struct kvm_vcpu *vcpu)
5535{
5536 struct kvm_lapic *apic = vcpu->arch.apic;
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005537 int idx;
Avi Kivityb93463a2007-10-25 16:52:32 +02005538
5539 if (!apic || !apic->vapic_addr)
5540 return;
5541
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005542 idx = srcu_read_lock(&vcpu->kvm->srcu);
Avi Kivityb93463a2007-10-25 16:52:32 +02005543 kvm_release_page_dirty(apic->vapic_page);
5544 mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005545 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Avi Kivityb93463a2007-10-25 16:52:32 +02005546}
5547
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005548static void update_cr8_intercept(struct kvm_vcpu *vcpu)
5549{
5550 int max_irr, tpr;
5551
5552 if (!kvm_x86_ops->update_cr8_intercept)
5553 return;
5554
Avi Kivity88c808f2009-08-17 22:49:40 +03005555 if (!vcpu->arch.apic)
5556 return;
5557
Gleb Natapov8db3baa2009-05-11 13:35:54 +03005558 if (!vcpu->arch.apic->vapic_addr)
5559 max_irr = kvm_lapic_find_highest_irr(vcpu);
5560 else
5561 max_irr = -1;
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005562
5563 if (max_irr != -1)
5564 max_irr >>= 4;
5565
5566 tpr = kvm_lapic_get_cr8(vcpu);
5567
5568 kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr);
5569}
5570
Avi Kivity851ba692009-08-24 11:10:17 +03005571static void inject_pending_event(struct kvm_vcpu *vcpu)
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005572{
5573 /* try to reinject previous events if any */
Gleb Natapovb59bb7b2009-07-09 15:33:51 +03005574 if (vcpu->arch.exception.pending) {
Avi Kivity5c1c85d2010-03-11 13:01:59 +02005575 trace_kvm_inj_exception(vcpu->arch.exception.nr,
5576 vcpu->arch.exception.has_error_code,
5577 vcpu->arch.exception.error_code);
Gleb Natapovb59bb7b2009-07-09 15:33:51 +03005578 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
5579 vcpu->arch.exception.has_error_code,
Joerg Roedelce7ddec2010-04-22 12:33:13 +02005580 vcpu->arch.exception.error_code,
5581 vcpu->arch.exception.reinject);
Gleb Natapovb59bb7b2009-07-09 15:33:51 +03005582 return;
5583 }
5584
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005585 if (vcpu->arch.nmi_injected) {
5586 kvm_x86_ops->set_nmi(vcpu);
5587 return;
5588 }
5589
5590 if (vcpu->arch.interrupt.pending) {
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005591 kvm_x86_ops->set_irq(vcpu);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005592 return;
5593 }
5594
5595 /* try to inject new event if pending */
5596 if (vcpu->arch.nmi_pending) {
5597 if (kvm_x86_ops->nmi_allowed(vcpu)) {
Avi Kivity7460fb4a2011-09-20 13:43:14 +03005598 --vcpu->arch.nmi_pending;
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005599 vcpu->arch.nmi_injected = true;
5600 kvm_x86_ops->set_nmi(vcpu);
5601 }
5602 } else if (kvm_cpu_has_interrupt(vcpu)) {
5603 if (kvm_x86_ops->interrupt_allowed(vcpu)) {
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005604 kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu),
5605 false);
5606 kvm_x86_ops->set_irq(vcpu);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005607 }
5608 }
5609}
5610
Dexuan Cui2acf9232010-06-10 11:27:12 +08005611static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu)
5612{
5613 if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) &&
5614 !vcpu->guest_xcr0_loaded) {
5615 /* kvm_set_xcr() also depends on this */
5616 xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0);
5617 vcpu->guest_xcr0_loaded = 1;
5618 }
5619}
5620
5621static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu)
5622{
5623 if (vcpu->guest_xcr0_loaded) {
5624 if (vcpu->arch.xcr0 != host_xcr0)
5625 xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0);
5626 vcpu->guest_xcr0_loaded = 0;
5627 }
5628}
5629
Avi Kivity7460fb4a2011-09-20 13:43:14 +03005630static void process_nmi(struct kvm_vcpu *vcpu)
5631{
5632 unsigned limit = 2;
5633
5634 /*
5635 * x86 is limited to one NMI running, and one NMI pending after it.
5636 * If an NMI is already in progress, limit further NMIs to just one.
5637 * Otherwise, allow two (and we'll inject the first one immediately).
5638 */
5639 if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected)
5640 limit = 1;
5641
5642 vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0);
5643 vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit);
5644 kvm_make_request(KVM_REQ_EVENT, vcpu);
5645}
5646
Avi Kivity851ba692009-08-24 11:10:17 +03005647static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005648{
5649 int r;
Gleb Natapov6a8b1d12009-05-11 13:35:51 +03005650 bool req_int_win = !irqchip_in_kernel(vcpu->kvm) &&
Avi Kivity851ba692009-08-24 11:10:17 +03005651 vcpu->run->request_interrupt_window;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005652
Avi Kivity3e007502010-06-23 14:26:18 +03005653 if (vcpu->requests) {
Avi Kivitya8eeb042010-05-10 12:34:53 +03005654 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu))
Marcelo Tosatti2e53d632008-02-20 14:47:24 -05005655 kvm_mmu_unload(vcpu);
Avi Kivitya8eeb042010-05-10 12:34:53 +03005656 if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu))
Marcelo Tosatti2f599712008-05-27 12:10:20 -03005657 __kvm_migrate_timers(vcpu);
Zachary Amsden34c238a2010-09-18 14:38:14 -10005658 if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) {
5659 r = kvm_guest_time_update(vcpu);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10005660 if (unlikely(r))
5661 goto out;
5662 }
Avi Kivitya8eeb042010-05-10 12:34:53 +03005663 if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu))
Marcelo Tosatti4731d4c2008-09-23 13:18:39 -03005664 kvm_mmu_sync_roots(vcpu);
Avi Kivitya8eeb042010-05-10 12:34:53 +03005665 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
Marcelo Tosattid4acf7e2008-06-06 16:37:35 -03005666 kvm_x86_ops->tlb_flush(vcpu);
Avi Kivitya8eeb042010-05-10 12:34:53 +03005667 if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03005668 vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
Avi Kivityb93463a2007-10-25 16:52:32 +02005669 r = 0;
5670 goto out;
5671 }
Avi Kivitya8eeb042010-05-10 12:34:53 +03005672 if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03005673 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
Joerg Roedel71c4dfa2008-02-26 16:49:16 +01005674 r = 0;
5675 goto out;
5676 }
Avi Kivitya8eeb042010-05-10 12:34:53 +03005677 if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) {
Avi Kivity02daab22009-12-30 12:40:26 +02005678 vcpu->fpu_active = 0;
5679 kvm_x86_ops->fpu_deactivate(vcpu);
5680 }
Gleb Natapovaf585b92010-10-14 11:22:46 +02005681 if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) {
5682 /* Page is swapped out. Do synthetic halt */
5683 vcpu->arch.apf.halted = true;
5684 r = 1;
5685 goto out;
5686 }
Glauber Costac9aaa892011-07-11 15:28:14 -04005687 if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu))
5688 record_steal_time(vcpu);
Avi Kivity7460fb4a2011-09-20 13:43:14 +03005689 if (kvm_check_request(KVM_REQ_NMI, vcpu))
5690 process_nmi(vcpu);
Glauber Costac9aaa892011-07-11 15:28:14 -04005691
Avi Kivity2f52d582008-01-16 12:49:30 +02005692 }
Avi Kivityb93463a2007-10-25 16:52:32 +02005693
Avi Kivity3e007502010-06-23 14:26:18 +03005694 r = kvm_mmu_reload(vcpu);
5695 if (unlikely(r))
5696 goto out;
5697
Avi Kivityb463a6f2010-07-20 15:06:17 +03005698 if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) {
Avi Kivity3842d132010-07-27 12:30:24 +03005699 inject_pending_event(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005700
Avi Kivity3842d132010-07-27 12:30:24 +03005701 /* enable NMI/IRQ window open exits if needed */
Avi Kivity7460fb4a2011-09-20 13:43:14 +03005702 if (vcpu->arch.nmi_pending)
Avi Kivity3842d132010-07-27 12:30:24 +03005703 kvm_x86_ops->enable_nmi_window(vcpu);
5704 else if (kvm_cpu_has_interrupt(vcpu) || req_int_win)
5705 kvm_x86_ops->enable_irq_window(vcpu);
Gleb Natapov6a8b1d12009-05-11 13:35:51 +03005706
Avi Kivity3842d132010-07-27 12:30:24 +03005707 if (kvm_lapic_enabled(vcpu)) {
5708 update_cr8_intercept(vcpu);
5709 kvm_lapic_sync_to_vapic(vcpu);
5710 }
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005711 }
Avi Kivityb93463a2007-10-25 16:52:32 +02005712
Jan Kiszka42dbaa52008-12-15 13:52:10 +01005713 preempt_disable();
5714
5715 kvm_x86_ops->prepare_guest_switch(vcpu);
5716 if (vcpu->fpu_active)
5717 kvm_load_guest_fpu(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005718 kvm_load_guest_xcr0(vcpu);
5719
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +08005720 vcpu->mode = IN_GUEST_MODE;
5721
5722 /* We should set ->mode before check ->requests,
5723 * see the comment in make_all_cpus_request.
5724 */
5725 smp_mb();
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005726
5727 local_irq_disable();
5728
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +08005729 if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005730 || need_resched() || signal_pending(current)) {
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +08005731 vcpu->mode = OUTSIDE_GUEST_MODE;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005732 smp_wmb();
5733 local_irq_enable();
5734 preempt_enable();
Avi Kivityb463a6f2010-07-20 15:06:17 +03005735 kvm_x86_ops->cancel_injection(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005736 r = 1;
5737 goto out;
5738 }
5739
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005740 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005741
5742 kvm_guest_enter();
5743
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005744 if (unlikely(vcpu->arch.switch_db_regs)) {
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005745 set_debugreg(0, 7);
5746 set_debugreg(vcpu->arch.eff_db[0], 0);
5747 set_debugreg(vcpu->arch.eff_db[1], 1);
5748 set_debugreg(vcpu->arch.eff_db[2], 2);
5749 set_debugreg(vcpu->arch.eff_db[3], 3);
5750 }
5751
Marcelo Tosatti229456f2009-06-17 09:22:14 -03005752 trace_kvm_entry(vcpu->vcpu_id);
Avi Kivity851ba692009-08-24 11:10:17 +03005753 kvm_x86_ops->run(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005754
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +02005755 /*
5756 * If the guest has used debug registers, at least dr7
5757 * will be disabled while returning to the host.
5758 * If we don't have active breakpoints in the host, we don't
5759 * care about the messed up debug address registers. But if
5760 * we have some of them active, restore the old state.
5761 */
Frederic Weisbecker59d8eb52009-11-10 11:03:12 +01005762 if (hw_breakpoint_active())
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +02005763 hw_breakpoint_restore();
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005764
Nadav Har'Eld5c17852011-08-02 15:54:20 +03005765 vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu);
Zachary Amsden1d5f0662010-08-19 22:07:30 -10005766
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +08005767 vcpu->mode = OUTSIDE_GUEST_MODE;
Avi Kivityd94e1dc2010-05-03 16:54:48 +03005768 smp_wmb();
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005769 local_irq_enable();
5770
5771 ++vcpu->stat.exits;
5772
5773 /*
5774 * We must have an instruction between local_irq_enable() and
5775 * kvm_guest_exit(), so the timer interrupt isn't delayed by
5776 * the interrupt shadow. The stat.exits increment will do nicely.
5777 * But we need to prevent reordering, hence this barrier():
5778 */
5779 barrier();
5780
5781 kvm_guest_exit();
5782
5783 preempt_enable();
5784
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005785 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
Marcelo Tosatti3200f402008-03-29 20:17:59 -03005786
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005787 /*
5788 * Profile KVM exit RIPs:
5789 */
5790 if (unlikely(prof_on == KVM_PROFILING)) {
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005791 unsigned long rip = kvm_rip_read(vcpu);
5792 profile_hit(KVM_PROFILING, (void *)rip);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005793 }
5794
Avi Kivity298101d2007-11-25 13:41:11 +02005795
Avi Kivityb93463a2007-10-25 16:52:32 +02005796 kvm_lapic_sync_from_vapic(vcpu);
5797
Avi Kivity851ba692009-08-24 11:10:17 +03005798 r = kvm_x86_ops->handle_exit(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005799out:
Marcelo Tosattid7690172008-09-08 15:23:48 -03005800 return r;
5801}
5802
Gleb Natapov09cec752009-03-23 15:11:44 +02005803
Avi Kivity851ba692009-08-24 11:10:17 +03005804static int __vcpu_run(struct kvm_vcpu *vcpu)
Marcelo Tosattid7690172008-09-08 15:23:48 -03005805{
5806 int r;
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005807 struct kvm *kvm = vcpu->kvm;
Marcelo Tosattid7690172008-09-08 15:23:48 -03005808
5809 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) {
Jan Kiszka1b10bf32008-09-30 10:41:06 +02005810 pr_debug("vcpu %d received sipi with vector # %x\n",
5811 vcpu->vcpu_id, vcpu->arch.sipi_vector);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005812 kvm_lapic_reset(vcpu);
Gleb Natapov5f179282008-10-07 15:42:33 +02005813 r = kvm_arch_vcpu_reset(vcpu);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005814 if (r)
5815 return r;
5816 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005817 }
5818
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005819 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005820 vapic_enter(vcpu);
5821
5822 r = 1;
5823 while (r > 0) {
Gleb Natapovaf585b92010-10-14 11:22:46 +02005824 if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
5825 !vcpu->arch.apf.halted)
Avi Kivity851ba692009-08-24 11:10:17 +03005826 r = vcpu_enter_guest(vcpu);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005827 else {
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005828 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005829 kvm_vcpu_block(vcpu);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005830 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
Avi Kivitya8eeb042010-05-10 12:34:53 +03005831 if (kvm_check_request(KVM_REQ_UNHALT, vcpu))
Gleb Natapov09cec752009-03-23 15:11:44 +02005832 {
5833 switch(vcpu->arch.mp_state) {
5834 case KVM_MP_STATE_HALTED:
Marcelo Tosattid7690172008-09-08 15:23:48 -03005835 vcpu->arch.mp_state =
Gleb Natapov09cec752009-03-23 15:11:44 +02005836 KVM_MP_STATE_RUNNABLE;
5837 case KVM_MP_STATE_RUNNABLE:
Gleb Natapovaf585b92010-10-14 11:22:46 +02005838 vcpu->arch.apf.halted = false;
Gleb Natapov09cec752009-03-23 15:11:44 +02005839 break;
5840 case KVM_MP_STATE_SIPI_RECEIVED:
5841 default:
5842 r = -EINTR;
5843 break;
5844 }
5845 }
Marcelo Tosattid7690172008-09-08 15:23:48 -03005846 }
5847
Gleb Natapov09cec752009-03-23 15:11:44 +02005848 if (r <= 0)
5849 break;
5850
5851 clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
5852 if (kvm_cpu_has_pending_timer(vcpu))
5853 kvm_inject_pending_timer_irqs(vcpu);
5854
Avi Kivity851ba692009-08-24 11:10:17 +03005855 if (dm_request_for_irq_injection(vcpu)) {
Gleb Natapov09cec752009-03-23 15:11:44 +02005856 r = -EINTR;
Avi Kivity851ba692009-08-24 11:10:17 +03005857 vcpu->run->exit_reason = KVM_EXIT_INTR;
Gleb Natapov09cec752009-03-23 15:11:44 +02005858 ++vcpu->stat.request_irq_exits;
5859 }
Gleb Natapovaf585b92010-10-14 11:22:46 +02005860
5861 kvm_check_async_pf_completion(vcpu);
5862
Gleb Natapov09cec752009-03-23 15:11:44 +02005863 if (signal_pending(current)) {
5864 r = -EINTR;
Avi Kivity851ba692009-08-24 11:10:17 +03005865 vcpu->run->exit_reason = KVM_EXIT_INTR;
Gleb Natapov09cec752009-03-23 15:11:44 +02005866 ++vcpu->stat.signal_exits;
5867 }
5868 if (need_resched()) {
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005869 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
Gleb Natapov09cec752009-03-23 15:11:44 +02005870 kvm_resched(vcpu);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005871 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005872 }
5873 }
5874
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005875 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005876
Avi Kivityb93463a2007-10-25 16:52:32 +02005877 vapic_exit(vcpu);
5878
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005879 return r;
5880}
5881
Avi Kivity5287f192010-01-19 14:20:10 +02005882static int complete_mmio(struct kvm_vcpu *vcpu)
5883{
5884 struct kvm_run *run = vcpu->run;
5885 int r;
5886
5887 if (!(vcpu->arch.pio.count || vcpu->mmio_needed))
5888 return 1;
5889
5890 if (vcpu->mmio_needed) {
Avi Kivity5287f192010-01-19 14:20:10 +02005891 vcpu->mmio_needed = 0;
Avi Kivitycef4dea2010-01-20 12:01:20 +02005892 if (!vcpu->mmio_is_write)
Gleb Natapov0004c7c2011-04-12 12:36:24 +03005893 memcpy(vcpu->mmio_data + vcpu->mmio_index,
5894 run->mmio.data, 8);
Avi Kivitycef4dea2010-01-20 12:01:20 +02005895 vcpu->mmio_index += 8;
5896 if (vcpu->mmio_index < vcpu->mmio_size) {
5897 run->exit_reason = KVM_EXIT_MMIO;
5898 run->mmio.phys_addr = vcpu->mmio_phys_addr + vcpu->mmio_index;
5899 memcpy(run->mmio.data, vcpu->mmio_data + vcpu->mmio_index, 8);
5900 run->mmio.len = min(vcpu->mmio_size - vcpu->mmio_index, 8);
5901 run->mmio.is_write = vcpu->mmio_is_write;
5902 vcpu->mmio_needed = 1;
5903 return 0;
5904 }
5905 if (vcpu->mmio_is_write)
5906 return 1;
5907 vcpu->mmio_read_completed = 1;
Avi Kivity5287f192010-01-19 14:20:10 +02005908 }
5909 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
5910 r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE);
5911 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
5912 if (r != EMULATE_DONE)
5913 return 0;
5914 return 1;
5915}
5916
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005917int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
5918{
5919 int r;
5920 sigset_t sigsaved;
5921
Avi Kivitye5c30142011-01-11 12:15:54 +02005922 if (!tsk_used_math(current) && init_fpu(current))
5923 return -ENOMEM;
5924
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005925 if (vcpu->sigset_active)
5926 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
5927
Avi Kivityac9f6dc2008-07-06 15:48:31 +03005928 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
5929 kvm_vcpu_block(vcpu);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005930 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
Avi Kivityac9f6dc2008-07-06 15:48:31 +03005931 r = -EAGAIN;
5932 goto out;
5933 }
5934
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005935 /* re-sync apic's tpr */
Andre Przywaraeea1cff2010-12-21 11:12:00 +01005936 if (!irqchip_in_kernel(vcpu->kvm)) {
5937 if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) {
5938 r = -EINVAL;
5939 goto out;
5940 }
5941 }
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005942
Avi Kivity5287f192010-01-19 14:20:10 +02005943 r = complete_mmio(vcpu);
5944 if (r <= 0)
5945 goto out;
5946
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005947 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL)
5948 kvm_register_write(vcpu, VCPU_REGS_RAX,
5949 kvm_run->hypercall.ret);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005950
Avi Kivity851ba692009-08-24 11:10:17 +03005951 r = __vcpu_run(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005952
5953out:
Marcelo Tosattif1d86e42010-05-03 23:04:27 -03005954 post_kvm_run_save(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005955 if (vcpu->sigset_active)
5956 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
5957
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005958 return r;
5959}
5960
5961int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
5962{
Gleb Natapov7ae441e2011-03-31 12:06:41 +02005963 if (vcpu->arch.emulate_regs_need_sync_to_vcpu) {
5964 /*
5965 * We are here if userspace calls get_regs() in the middle of
5966 * instruction emulation. Registers state needs to be copied
5967 * back from emulation context to vcpu. Usrapace shouldn't do
5968 * that usually, but some bad designed PV devices (vmware
5969 * backdoor interface) need this to work
5970 */
Avi Kivity9dac77f2011-06-01 15:34:25 +03005971 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
5972 memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02005973 vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
5974 }
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005975 regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX);
5976 regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX);
5977 regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX);
5978 regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX);
5979 regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI);
5980 regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI);
5981 regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
5982 regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005983#ifdef CONFIG_X86_64
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005984 regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8);
5985 regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9);
5986 regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10);
5987 regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11);
5988 regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12);
5989 regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13);
5990 regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14);
5991 regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005992#endif
5993
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005994 regs->rip = kvm_rip_read(vcpu);
Jan Kiszka91586a32009-10-05 13:07:21 +02005995 regs->rflags = kvm_get_rflags(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005996
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005997 return 0;
5998}
5999
6000int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
6001{
Gleb Natapov7ae441e2011-03-31 12:06:41 +02006002 vcpu->arch.emulate_regs_need_sync_from_vcpu = true;
6003 vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
6004
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03006005 kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax);
6006 kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx);
6007 kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx);
6008 kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx);
6009 kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi);
6010 kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi);
6011 kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp);
6012 kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006013#ifdef CONFIG_X86_64
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03006014 kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8);
6015 kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9);
6016 kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10);
6017 kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11);
6018 kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12);
6019 kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13);
6020 kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14);
6021 kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006022#endif
6023
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03006024 kvm_rip_write(vcpu, regs->rip);
Jan Kiszka91586a32009-10-05 13:07:21 +02006025 kvm_set_rflags(vcpu, regs->rflags);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006026
Jan Kiszkab4f14ab2008-04-30 17:59:04 +02006027 vcpu->arch.exception.pending = false;
6028
Avi Kivity3842d132010-07-27 12:30:24 +03006029 kvm_make_request(KVM_REQ_EVENT, vcpu);
6030
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006031 return 0;
6032}
6033
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006034void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
6035{
6036 struct kvm_segment cs;
6037
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02006038 kvm_get_segment(vcpu, &cs, VCPU_SREG_CS);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006039 *db = cs.db;
6040 *l = cs.l;
6041}
6042EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
6043
6044int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
6045 struct kvm_sregs *sregs)
6046{
Gleb Natapov89a27f42010-02-16 10:51:48 +02006047 struct desc_ptr dt;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006048
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02006049 kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
6050 kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
6051 kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
6052 kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
6053 kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
6054 kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006055
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02006056 kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
6057 kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006058
6059 kvm_x86_ops->get_idt(vcpu, &dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02006060 sregs->idt.limit = dt.size;
6061 sregs->idt.base = dt.address;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006062 kvm_x86_ops->get_gdt(vcpu, &dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02006063 sregs->gdt.limit = dt.size;
6064 sregs->gdt.base = dt.address;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006065
Avi Kivity4d4ec082009-12-29 18:07:30 +02006066 sregs->cr0 = kvm_read_cr0(vcpu);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006067 sregs->cr2 = vcpu->arch.cr2;
Avi Kivity9f8fe502010-12-05 17:30:00 +02006068 sregs->cr3 = kvm_read_cr3(vcpu);
Avi Kivityfc78f512009-12-07 12:16:48 +02006069 sregs->cr4 = kvm_read_cr4(vcpu);
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02006070 sregs->cr8 = kvm_get_cr8(vcpu);
Avi Kivityf6801df2010-01-21 15:31:50 +02006071 sregs->efer = vcpu->arch.efer;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006072 sregs->apic_base = kvm_get_apic_base(vcpu);
6073
Gleb Natapov923c61b2009-05-11 13:35:48 +03006074 memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006075
Gleb Natapov36752c92009-05-11 13:35:53 +03006076 if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft)
Gleb Natapov14d0bc12009-04-21 17:45:11 +03006077 set_bit(vcpu->arch.interrupt.nr,
6078 (unsigned long *)sregs->interrupt_bitmap);
Gleb Natapov16d7a192009-04-21 17:45:10 +03006079
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006080 return 0;
6081}
6082
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03006083int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
6084 struct kvm_mp_state *mp_state)
6085{
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03006086 mp_state->mp_state = vcpu->arch.mp_state;
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03006087 return 0;
6088}
6089
6090int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
6091 struct kvm_mp_state *mp_state)
6092{
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03006093 vcpu->arch.mp_state = mp_state->mp_state;
Avi Kivity3842d132010-07-27 12:30:24 +03006094 kvm_make_request(KVM_REQ_EVENT, vcpu);
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03006095 return 0;
6096}
6097
Jan Kiszkae269fb22010-04-14 15:51:09 +02006098int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
6099 bool has_error_code, u32 error_code)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006100{
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09006101 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Mohammed Gamal8ec47222010-08-16 00:47:01 +03006102 int ret;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006103
Mohammed Gamal8ec47222010-08-16 00:47:01 +03006104 init_emulate_ctxt(vcpu);
Izik Eidus37817f22008-03-24 23:14:53 +02006105
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09006106 ret = emulator_task_switch(ctxt, tss_selector, reason,
6107 has_error_code, error_code);
Izik Eidus37817f22008-03-24 23:14:53 +02006108
Gleb Natapovc6975182010-02-18 12:15:01 +02006109 if (ret)
Gleb Natapov19d04432010-04-15 12:29:50 +03006110 return EMULATE_FAIL;
Gleb Natapovc6975182010-02-18 12:15:01 +02006111
Avi Kivity9dac77f2011-06-01 15:34:25 +03006112 memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs);
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09006113 kvm_rip_write(vcpu, ctxt->eip);
6114 kvm_set_rflags(vcpu, ctxt->eflags);
Avi Kivity3842d132010-07-27 12:30:24 +03006115 kvm_make_request(KVM_REQ_EVENT, vcpu);
Gleb Natapov19d04432010-04-15 12:29:50 +03006116 return EMULATE_DONE;
Izik Eidus37817f22008-03-24 23:14:53 +02006117}
6118EXPORT_SYMBOL_GPL(kvm_task_switch);
6119
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006120int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
6121 struct kvm_sregs *sregs)
6122{
6123 int mmu_reset_needed = 0;
Xiao Guangrong63f42e02011-01-12 15:39:18 +08006124 int pending_vec, max_bits, idx;
Gleb Natapov89a27f42010-02-16 10:51:48 +02006125 struct desc_ptr dt;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006126
Gleb Natapov89a27f42010-02-16 10:51:48 +02006127 dt.size = sregs->idt.limit;
6128 dt.address = sregs->idt.base;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006129 kvm_x86_ops->set_idt(vcpu, &dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02006130 dt.size = sregs->gdt.limit;
6131 dt.address = sregs->gdt.base;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006132 kvm_x86_ops->set_gdt(vcpu, &dt);
6133
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006134 vcpu->arch.cr2 = sregs->cr2;
Avi Kivity9f8fe502010-12-05 17:30:00 +02006135 mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3;
Jan Kiszkadc7e7952009-07-01 20:52:03 +02006136 vcpu->arch.cr3 = sregs->cr3;
Avi Kivityaff48ba2010-12-05 18:56:11 +02006137 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006138
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02006139 kvm_set_cr8(vcpu, sregs->cr8);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006140
Avi Kivityf6801df2010-01-21 15:31:50 +02006141 mmu_reset_needed |= vcpu->arch.efer != sregs->efer;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006142 kvm_x86_ops->set_efer(vcpu, sregs->efer);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006143 kvm_set_apic_base(vcpu, sregs->apic_base);
6144
Avi Kivity4d4ec082009-12-29 18:07:30 +02006145 mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006146 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
Paul Knowlesd7306162008-02-06 11:02:35 +00006147 vcpu->arch.cr0 = sregs->cr0;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006148
Avi Kivityfc78f512009-12-07 12:16:48 +02006149 mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006150 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
Sheng Yang3ea3aa82010-12-08 10:49:43 +08006151 if (sregs->cr4 & X86_CR4_OSXSAVE)
6152 update_cpuid(vcpu);
Xiao Guangrong63f42e02011-01-12 15:39:18 +08006153
6154 idx = srcu_read_lock(&vcpu->kvm->srcu);
Marcelo Tosatti7c93be42009-10-26 16:48:33 -02006155 if (!is_long_mode(vcpu) && is_pae(vcpu)) {
Avi Kivity9f8fe502010-12-05 17:30:00 +02006156 load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
Marcelo Tosatti7c93be42009-10-26 16:48:33 -02006157 mmu_reset_needed = 1;
6158 }
Xiao Guangrong63f42e02011-01-12 15:39:18 +08006159 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006160
6161 if (mmu_reset_needed)
6162 kvm_mmu_reset_context(vcpu);
6163
Gleb Natapov923c61b2009-05-11 13:35:48 +03006164 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
6165 pending_vec = find_first_bit(
6166 (const unsigned long *)sregs->interrupt_bitmap, max_bits);
6167 if (pending_vec < max_bits) {
Gleb Natapov66fd3f72009-05-11 13:35:50 +03006168 kvm_queue_interrupt(vcpu, pending_vec, false);
Gleb Natapov923c61b2009-05-11 13:35:48 +03006169 pr_debug("Set back pending irq %d\n", pending_vec);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006170 }
6171
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02006172 kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
6173 kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
6174 kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
6175 kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
6176 kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
6177 kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006178
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02006179 kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
6180 kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006181
Mikhail Ershov5f0269f2009-08-03 14:58:25 +03006182 update_cr8_intercept(vcpu);
6183
Marcelo Tosatti9c3e4aa2008-09-10 16:40:55 -03006184 /* Older userspace won't unhalt the vcpu on reset. */
Gleb Natapovc5af89b2009-06-09 15:56:26 +03006185 if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 &&
Marcelo Tosatti9c3e4aa2008-09-10 16:40:55 -03006186 sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 &&
Avi Kivity3eeb3282010-01-21 15:31:48 +02006187 !is_protmode(vcpu))
Marcelo Tosatti9c3e4aa2008-09-10 16:40:55 -03006188 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
6189
Avi Kivity3842d132010-07-27 12:30:24 +03006190 kvm_make_request(KVM_REQ_EVENT, vcpu);
6191
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006192 return 0;
6193}
6194
Jan Kiszkad0bfb942008-12-15 13:52:10 +01006195int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
6196 struct kvm_guest_debug *dbg)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006197{
Jan Kiszka355be0b2009-10-03 00:31:21 +02006198 unsigned long rflags;
Jan Kiszkaae675ef2008-12-15 13:52:10 +01006199 int i, r;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006200
Jan Kiszka4f926bf22009-10-30 12:46:59 +01006201 if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) {
6202 r = -EBUSY;
6203 if (vcpu->arch.exception.pending)
Avi Kivity2122ff52010-05-13 11:25:04 +03006204 goto out;
Jan Kiszka4f926bf22009-10-30 12:46:59 +01006205 if (dbg->control & KVM_GUESTDBG_INJECT_DB)
6206 kvm_queue_exception(vcpu, DB_VECTOR);
6207 else
6208 kvm_queue_exception(vcpu, BP_VECTOR);
6209 }
6210
Jan Kiszka91586a32009-10-05 13:07:21 +02006211 /*
6212 * Read rflags as long as potentially injected trace flags are still
6213 * filtered out.
6214 */
6215 rflags = kvm_get_rflags(vcpu);
Jan Kiszka355be0b2009-10-03 00:31:21 +02006216
6217 vcpu->guest_debug = dbg->control;
6218 if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE))
6219 vcpu->guest_debug = 0;
6220
6221 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
Jan Kiszkaae675ef2008-12-15 13:52:10 +01006222 for (i = 0; i < KVM_NR_DB_REGS; ++i)
6223 vcpu->arch.eff_db[i] = dbg->arch.debugreg[i];
6224 vcpu->arch.switch_db_regs =
6225 (dbg->arch.debugreg[7] & DR7_BP_EN_MASK);
6226 } else {
6227 for (i = 0; i < KVM_NR_DB_REGS; i++)
6228 vcpu->arch.eff_db[i] = vcpu->arch.db[i];
6229 vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK);
6230 }
6231
Jan Kiszkaf92653e2010-02-23 17:47:55 +01006232 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
6233 vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) +
6234 get_segment_base(vcpu, VCPU_SREG_CS);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006235
Jan Kiszka91586a32009-10-05 13:07:21 +02006236 /*
6237 * Trigger an rflags update that will inject or remove the trace
6238 * flags.
6239 */
6240 kvm_set_rflags(vcpu, rflags);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01006241
Jan Kiszka355be0b2009-10-03 00:31:21 +02006242 kvm_x86_ops->set_guest_debug(vcpu, dbg);
6243
Jan Kiszka4f926bf22009-10-30 12:46:59 +01006244 r = 0;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006245
Avi Kivity2122ff52010-05-13 11:25:04 +03006246out:
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05006247
6248 return r;
6249}
6250
6251/*
Zhang Xiantao8b006792007-11-16 13:05:55 +08006252 * Translate a guest virtual address to a guest physical address.
6253 */
6254int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
6255 struct kvm_translation *tr)
6256{
6257 unsigned long vaddr = tr->linear_address;
6258 gpa_t gpa;
Marcelo Tosattif656ce02009-12-23 14:35:25 -02006259 int idx;
Zhang Xiantao8b006792007-11-16 13:05:55 +08006260
Marcelo Tosattif656ce02009-12-23 14:35:25 -02006261 idx = srcu_read_lock(&vcpu->kvm->srcu);
Gleb Natapov1871c602010-02-10 14:21:32 +02006262 gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02006263 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Zhang Xiantao8b006792007-11-16 13:05:55 +08006264 tr->physical_address = gpa;
6265 tr->valid = gpa != UNMAPPED_GVA;
6266 tr->writeable = 1;
6267 tr->usermode = 0;
Zhang Xiantao8b006792007-11-16 13:05:55 +08006268
6269 return 0;
6270}
6271
Hollis Blanchardd0752062007-10-31 17:24:25 -05006272int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
6273{
Sheng Yang98918832010-05-17 17:08:28 +08006274 struct i387_fxsave_struct *fxsave =
6275 &vcpu->arch.guest_fpu.state->fxsave;
Hollis Blanchardd0752062007-10-31 17:24:25 -05006276
Hollis Blanchardd0752062007-10-31 17:24:25 -05006277 memcpy(fpu->fpr, fxsave->st_space, 128);
6278 fpu->fcw = fxsave->cwd;
6279 fpu->fsw = fxsave->swd;
6280 fpu->ftwx = fxsave->twd;
6281 fpu->last_opcode = fxsave->fop;
6282 fpu->last_ip = fxsave->rip;
6283 fpu->last_dp = fxsave->rdp;
6284 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
6285
Hollis Blanchardd0752062007-10-31 17:24:25 -05006286 return 0;
6287}
6288
6289int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
6290{
Sheng Yang98918832010-05-17 17:08:28 +08006291 struct i387_fxsave_struct *fxsave =
6292 &vcpu->arch.guest_fpu.state->fxsave;
Hollis Blanchardd0752062007-10-31 17:24:25 -05006293
Hollis Blanchardd0752062007-10-31 17:24:25 -05006294 memcpy(fxsave->st_space, fpu->fpr, 128);
6295 fxsave->cwd = fpu->fcw;
6296 fxsave->swd = fpu->fsw;
6297 fxsave->twd = fpu->ftwx;
6298 fxsave->fop = fpu->last_opcode;
6299 fxsave->rip = fpu->last_ip;
6300 fxsave->rdp = fpu->last_dp;
6301 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
6302
Hollis Blanchardd0752062007-10-31 17:24:25 -05006303 return 0;
6304}
6305
Jan Kiszka10ab25c2010-05-25 16:01:50 +02006306int fx_init(struct kvm_vcpu *vcpu)
Hollis Blanchardd0752062007-10-31 17:24:25 -05006307{
Jan Kiszka10ab25c2010-05-25 16:01:50 +02006308 int err;
6309
6310 err = fpu_alloc(&vcpu->arch.guest_fpu);
6311 if (err)
6312 return err;
6313
Sheng Yang98918832010-05-17 17:08:28 +08006314 fpu_finit(&vcpu->arch.guest_fpu);
Hollis Blanchardd0752062007-10-31 17:24:25 -05006315
Dexuan Cui2acf9232010-06-10 11:27:12 +08006316 /*
6317 * Ensure guest xcr0 is valid for loading
6318 */
6319 vcpu->arch.xcr0 = XSTATE_FP;
6320
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006321 vcpu->arch.cr0 |= X86_CR0_ET;
Jan Kiszka10ab25c2010-05-25 16:01:50 +02006322
6323 return 0;
Hollis Blanchardd0752062007-10-31 17:24:25 -05006324}
6325EXPORT_SYMBOL_GPL(fx_init);
6326
Sheng Yang98918832010-05-17 17:08:28 +08006327static void fx_free(struct kvm_vcpu *vcpu)
6328{
6329 fpu_free(&vcpu->arch.guest_fpu);
6330}
6331
Hollis Blanchardd0752062007-10-31 17:24:25 -05006332void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
6333{
Avi Kivity2608d7a2010-01-21 15:31:45 +02006334 if (vcpu->guest_fpu_loaded)
Hollis Blanchardd0752062007-10-31 17:24:25 -05006335 return;
6336
Dexuan Cui2acf9232010-06-10 11:27:12 +08006337 /*
6338 * Restore all possible states in the guest,
6339 * and assume host would use all available bits.
6340 * Guest xcr0 would be loaded later.
6341 */
6342 kvm_put_guest_xcr0(vcpu);
Hollis Blanchardd0752062007-10-31 17:24:25 -05006343 vcpu->guest_fpu_loaded = 1;
Sheng Yang7cf30852010-05-17 17:08:27 +08006344 unlazy_fpu(current);
Sheng Yang98918832010-05-17 17:08:28 +08006345 fpu_restore_checking(&vcpu->arch.guest_fpu);
Avi Kivity0c048512010-01-21 15:31:52 +02006346 trace_kvm_fpu(1);
Hollis Blanchardd0752062007-10-31 17:24:25 -05006347}
Hollis Blanchardd0752062007-10-31 17:24:25 -05006348
6349void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
6350{
Dexuan Cui2acf9232010-06-10 11:27:12 +08006351 kvm_put_guest_xcr0(vcpu);
6352
Hollis Blanchardd0752062007-10-31 17:24:25 -05006353 if (!vcpu->guest_fpu_loaded)
6354 return;
6355
6356 vcpu->guest_fpu_loaded = 0;
Sheng Yang98918832010-05-17 17:08:28 +08006357 fpu_save_init(&vcpu->arch.guest_fpu);
Avi Kivityf096ed82007-11-18 13:54:33 +02006358 ++vcpu->stat.fpu_reload;
Avi Kivitya8eeb042010-05-10 12:34:53 +03006359 kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu);
Avi Kivity0c048512010-01-21 15:31:52 +02006360 trace_kvm_fpu(0);
Hollis Blanchardd0752062007-10-31 17:24:25 -05006361}
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006362
6363void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
6364{
Glauber Costa12f9a482011-02-01 14:16:40 -05006365 kvmclock_reset(vcpu);
Joerg Roedel7f1ea202009-02-25 16:08:31 +01006366
Sheng Yangf5f48ee2010-06-30 12:25:15 +08006367 free_cpumask_var(vcpu->arch.wbinvd_dirty_mask);
Sheng Yang98918832010-05-17 17:08:28 +08006368 fx_free(vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006369 kvm_x86_ops->vcpu_free(vcpu);
6370}
6371
6372struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
6373 unsigned int id)
6374{
Zachary Amsden6755bae2010-08-19 22:07:22 -10006375 if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0)
6376 printk_once(KERN_WARNING
6377 "kvm: SMP vm created on host with unstable TSC; "
6378 "guest TSC will not be reliable\n");
Avi Kivity26e52152007-11-20 15:30:24 +02006379 return kvm_x86_ops->vcpu_create(kvm, id);
6380}
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006381
Avi Kivity26e52152007-11-20 15:30:24 +02006382int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
6383{
6384 int r;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006385
Sheng Yang0bed3b52008-10-09 16:01:54 +08006386 vcpu->arch.mtrr_state.have_fixed = 1;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006387 vcpu_load(vcpu);
6388 r = kvm_arch_vcpu_reset(vcpu);
6389 if (r == 0)
6390 r = kvm_mmu_setup(vcpu);
6391 vcpu_put(vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006392
Avi Kivity26e52152007-11-20 15:30:24 +02006393 return r;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006394}
6395
Hollis Blanchardd40ccc62007-11-19 14:04:43 -06006396void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006397{
Gleb Natapov344d9582010-10-14 11:22:50 +02006398 vcpu->arch.apf.msr_val = 0;
6399
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006400 vcpu_load(vcpu);
6401 kvm_mmu_unload(vcpu);
6402 vcpu_put(vcpu);
6403
Sheng Yang98918832010-05-17 17:08:28 +08006404 fx_free(vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006405 kvm_x86_ops->vcpu_free(vcpu);
6406}
6407
6408int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
6409{
Avi Kivity7460fb4a2011-09-20 13:43:14 +03006410 atomic_set(&vcpu->arch.nmi_queued, 0);
6411 vcpu->arch.nmi_pending = 0;
Jan Kiszka448fa4a2008-09-26 09:30:48 +02006412 vcpu->arch.nmi_injected = false;
6413
Jan Kiszka42dbaa52008-12-15 13:52:10 +01006414 vcpu->arch.switch_db_regs = 0;
6415 memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db));
6416 vcpu->arch.dr6 = DR6_FIXED_1;
6417 vcpu->arch.dr7 = DR7_FIXED_1;
6418
Avi Kivity3842d132010-07-27 12:30:24 +03006419 kvm_make_request(KVM_REQ_EVENT, vcpu);
Gleb Natapov344d9582010-10-14 11:22:50 +02006420 vcpu->arch.apf.msr_val = 0;
Glauber Costac9aaa892011-07-11 15:28:14 -04006421 vcpu->arch.st.msr_val = 0;
Avi Kivity3842d132010-07-27 12:30:24 +03006422
Glauber Costa12f9a482011-02-01 14:16:40 -05006423 kvmclock_reset(vcpu);
6424
Gleb Natapovaf585b92010-10-14 11:22:46 +02006425 kvm_clear_async_pf_completion_queue(vcpu);
6426 kvm_async_pf_hash_reset(vcpu);
6427 vcpu->arch.apf.halted = false;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006428
6429 return kvm_x86_ops->vcpu_reset(vcpu);
6430}
6431
Alexander Graf10474ae2009-09-15 11:37:46 +02006432int kvm_arch_hardware_enable(void *garbage)
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006433{
Zachary Amsdenca84d1a2010-08-19 22:07:28 -10006434 struct kvm *kvm;
6435 struct kvm_vcpu *vcpu;
6436 int i;
Avi Kivity18863bd2009-09-07 11:12:18 +03006437
6438 kvm_shared_msr_cpu_online();
Zachary Amsdenca84d1a2010-08-19 22:07:28 -10006439 list_for_each_entry(kvm, &vm_list, vm_list)
6440 kvm_for_each_vcpu(i, vcpu, kvm)
6441 if (vcpu->cpu == smp_processor_id())
Zachary Amsdenc2855452010-09-18 14:38:15 -10006442 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
Alexander Graf10474ae2009-09-15 11:37:46 +02006443 return kvm_x86_ops->hardware_enable(garbage);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006444}
6445
6446void kvm_arch_hardware_disable(void *garbage)
6447{
6448 kvm_x86_ops->hardware_disable(garbage);
Avi Kivity3548bab2009-11-28 14:18:47 +02006449 drop_user_return_notifiers(garbage);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006450}
6451
6452int kvm_arch_hardware_setup(void)
6453{
6454 return kvm_x86_ops->hardware_setup();
6455}
6456
6457void kvm_arch_hardware_unsetup(void)
6458{
6459 kvm_x86_ops->hardware_unsetup();
6460}
6461
6462void kvm_arch_check_processor_compat(void *rtn)
6463{
6464 kvm_x86_ops->check_processor_compatibility(rtn);
6465}
6466
6467int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
6468{
6469 struct page *page;
6470 struct kvm *kvm;
6471 int r;
6472
6473 BUG_ON(vcpu->kvm == NULL);
6474 kvm = vcpu->kvm;
6475
Avi Kivity9aabc882010-07-29 15:11:50 +03006476 vcpu->arch.emulate_ctxt.ops = &emulate_ops;
Joerg Roedel14dfe852010-09-10 17:30:49 +02006477 vcpu->arch.walk_mmu = &vcpu->arch.mmu;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006478 vcpu->arch.mmu.root_hpa = INVALID_PAGE;
Joerg Roedelc30a3582010-09-10 17:30:48 +02006479 vcpu->arch.mmu.translate_gpa = translate_gpa;
Joerg Roedel02f59dc2010-09-10 17:30:54 +02006480 vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa;
Gleb Natapovc5af89b2009-06-09 15:56:26 +03006481 if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu))
Avi Kivitya4535292008-04-13 17:54:35 +03006482 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006483 else
Avi Kivitya4535292008-04-13 17:54:35 +03006484 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006485
6486 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
6487 if (!page) {
6488 r = -ENOMEM;
6489 goto fail;
6490 }
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006491 vcpu->arch.pio_data = page_address(page);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006492
Joerg Roedel1e993612011-03-25 09:44:47 +01006493 kvm_init_tsc_catchup(vcpu, max_tsc_khz);
Zachary Amsdenc2855452010-09-18 14:38:15 -10006494
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006495 r = kvm_mmu_create(vcpu);
6496 if (r < 0)
6497 goto fail_free_pio_data;
6498
6499 if (irqchip_in_kernel(kvm)) {
6500 r = kvm_create_lapic(vcpu);
6501 if (r < 0)
6502 goto fail_mmu_destroy;
6503 }
6504
Huang Ying890ca9a2009-05-11 16:48:15 +08006505 vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4,
6506 GFP_KERNEL);
6507 if (!vcpu->arch.mce_banks) {
6508 r = -ENOMEM;
Wei Yongjun443c39b2010-01-22 14:21:29 +08006509 goto fail_free_lapic;
Huang Ying890ca9a2009-05-11 16:48:15 +08006510 }
6511 vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
6512
Sheng Yangf5f48ee2010-06-30 12:25:15 +08006513 if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL))
6514 goto fail_free_mce_banks;
6515
Gleb Natapovaf585b92010-10-14 11:22:46 +02006516 kvm_async_pf_hash_reset(vcpu);
6517
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006518 return 0;
Sheng Yangf5f48ee2010-06-30 12:25:15 +08006519fail_free_mce_banks:
6520 kfree(vcpu->arch.mce_banks);
Wei Yongjun443c39b2010-01-22 14:21:29 +08006521fail_free_lapic:
6522 kvm_free_lapic(vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006523fail_mmu_destroy:
6524 kvm_mmu_destroy(vcpu);
6525fail_free_pio_data:
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006526 free_page((unsigned long)vcpu->arch.pio_data);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006527fail:
6528 return r;
6529}
6530
6531void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
6532{
Marcelo Tosattif656ce02009-12-23 14:35:25 -02006533 int idx;
6534
Wei Yongjun36cb93f2010-01-22 14:18:47 +08006535 kfree(vcpu->arch.mce_banks);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006536 kvm_free_lapic(vcpu);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02006537 idx = srcu_read_lock(&vcpu->kvm->srcu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006538 kvm_mmu_destroy(vcpu);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02006539 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006540 free_page((unsigned long)vcpu->arch.pio_data);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006541}
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006542
Jan Kiszkad89f5ef2010-11-09 17:02:49 +01006543int kvm_arch_init_vm(struct kvm *kvm)
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006544{
Zhang Xiantaof05e70a2007-12-14 10:01:48 +08006545 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
Ben-Ami Yassour4d5c5d02008-07-28 19:26:26 +03006546 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006547
Sheng Yang5550af42008-10-15 20:15:06 +08006548 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
6549 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
6550
Jan Kiszka038f8c12011-02-04 10:49:11 +01006551 raw_spin_lock_init(&kvm->arch.tsc_write_lock);
Marcelo Tosatti53f658b2008-12-11 20:45:05 +01006552
Jan Kiszkad89f5ef2010-11-09 17:02:49 +01006553 return 0;
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006554}
6555
6556static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
6557{
6558 vcpu_load(vcpu);
6559 kvm_mmu_unload(vcpu);
6560 vcpu_put(vcpu);
6561}
6562
6563static void kvm_free_vcpus(struct kvm *kvm)
6564{
6565 unsigned int i;
Gleb Natapov988a2ca2009-06-09 15:56:29 +03006566 struct kvm_vcpu *vcpu;
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006567
6568 /*
6569 * Unpin any mmu pages first.
6570 */
Gleb Natapovaf585b92010-10-14 11:22:46 +02006571 kvm_for_each_vcpu(i, vcpu, kvm) {
6572 kvm_clear_async_pf_completion_queue(vcpu);
Gleb Natapov988a2ca2009-06-09 15:56:29 +03006573 kvm_unload_vcpu_mmu(vcpu);
Gleb Natapovaf585b92010-10-14 11:22:46 +02006574 }
Gleb Natapov988a2ca2009-06-09 15:56:29 +03006575 kvm_for_each_vcpu(i, vcpu, kvm)
6576 kvm_arch_vcpu_free(vcpu);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006577
Gleb Natapov988a2ca2009-06-09 15:56:29 +03006578 mutex_lock(&kvm->lock);
6579 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
6580 kvm->vcpus[i] = NULL;
6581
6582 atomic_set(&kvm->online_vcpus, 0);
6583 mutex_unlock(&kvm->lock);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006584}
6585
Sheng Yangad8ba2c2009-01-06 10:03:02 +08006586void kvm_arch_sync_events(struct kvm *kvm)
6587{
Sheng Yangba4cef32009-01-06 10:03:03 +08006588 kvm_free_all_assigned_devices(kvm);
Xiao Guangrongaea924f2010-07-10 17:37:56 +08006589 kvm_free_pit(kvm);
Sheng Yangad8ba2c2009-01-06 10:03:02 +08006590}
6591
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006592void kvm_arch_destroy_vm(struct kvm *kvm)
6593{
Sheng Yang6eb55812008-10-31 12:37:41 +08006594 kvm_iommu_unmap_guest(kvm);
Zhang Xiantaod7deeeb02007-12-14 10:17:34 +08006595 kfree(kvm->arch.vpic);
6596 kfree(kvm->arch.vioapic);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006597 kvm_free_vcpus(kvm);
Avi Kivity3d458302008-03-25 11:26:13 +02006598 if (kvm->arch.apic_access_page)
6599 put_page(kvm->arch.apic_access_page);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08006600 if (kvm->arch.ept_identity_pagetable)
6601 put_page(kvm->arch.ept_identity_pagetable);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006602}
Zhang Xiantao0de10342007-11-20 16:25:04 +08006603
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006604int kvm_arch_prepare_memory_region(struct kvm *kvm,
6605 struct kvm_memory_slot *memslot,
Zhang Xiantao0de10342007-11-20 16:25:04 +08006606 struct kvm_memory_slot old,
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006607 struct kvm_userspace_memory_region *mem,
Zhang Xiantao0de10342007-11-20 16:25:04 +08006608 int user_alloc)
6609{
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006610 int npages = memslot->npages;
Avi Kivity7ac77092010-06-21 10:57:45 +03006611 int map_flags = MAP_PRIVATE | MAP_ANONYMOUS;
6612
6613 /* Prevent internal slot pages from being moved by fork()/COW. */
6614 if (memslot->id >= KVM_MEMORY_SLOTS)
6615 map_flags = MAP_SHARED | MAP_ANONYMOUS;
Zhang Xiantao0de10342007-11-20 16:25:04 +08006616
6617 /*To keep backward compatibility with older userspace,
6618 *x86 needs to hanlde !user_alloc case.
6619 */
6620 if (!user_alloc) {
6621 if (npages && !old.rmap) {
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006622 unsigned long userspace_addr;
6623
Izik Eidus72dc67a2008-02-10 18:04:15 +02006624 down_write(&current->mm->mmap_sem);
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006625 userspace_addr = do_mmap(NULL, 0,
6626 npages * PAGE_SIZE,
6627 PROT_READ | PROT_WRITE,
Avi Kivity7ac77092010-06-21 10:57:45 +03006628 map_flags,
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006629 0);
Izik Eidus72dc67a2008-02-10 18:04:15 +02006630 up_write(&current->mm->mmap_sem);
Zhang Xiantao0de10342007-11-20 16:25:04 +08006631
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006632 if (IS_ERR((void *)userspace_addr))
6633 return PTR_ERR((void *)userspace_addr);
6634
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006635 memslot->userspace_addr = userspace_addr;
Zhang Xiantao0de10342007-11-20 16:25:04 +08006636 }
6637 }
6638
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006639
6640 return 0;
6641}
6642
6643void kvm_arch_commit_memory_region(struct kvm *kvm,
6644 struct kvm_userspace_memory_region *mem,
6645 struct kvm_memory_slot old,
6646 int user_alloc)
6647{
6648
Xiao Guangrong48c0e4e2011-03-04 18:59:21 +08006649 int nr_mmu_pages = 0, npages = mem->memory_size >> PAGE_SHIFT;
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006650
6651 if (!user_alloc && !old.user_alloc && old.rmap && !npages) {
6652 int ret;
6653
6654 down_write(&current->mm->mmap_sem);
6655 ret = do_munmap(current->mm, old.userspace_addr,
6656 old.npages * PAGE_SIZE);
6657 up_write(&current->mm->mmap_sem);
6658 if (ret < 0)
6659 printk(KERN_WARNING
6660 "kvm_vm_ioctl_set_memory_region: "
6661 "failed to munmap memory\n");
6662 }
6663
Xiao Guangrong48c0e4e2011-03-04 18:59:21 +08006664 if (!kvm->arch.n_requested_mmu_pages)
6665 nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
Zhang Xiantao0de10342007-11-20 16:25:04 +08006666
Xiao Guangrong48c0e4e2011-03-04 18:59:21 +08006667 spin_lock(&kvm->mmu_lock);
6668 if (nr_mmu_pages)
6669 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
Zhang Xiantao0de10342007-11-20 16:25:04 +08006670 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
Marcelo Tosatti7c8a83b2009-05-12 18:55:43 -03006671 spin_unlock(&kvm->mmu_lock);
Zhang Xiantao0de10342007-11-20 16:25:04 +08006672}
Zhang Xiantao1d737c82007-12-14 09:35:10 +08006673
Marcelo Tosatti34d4cb82008-07-10 20:49:31 -03006674void kvm_arch_flush_shadow(struct kvm *kvm)
6675{
6676 kvm_mmu_zap_all(kvm);
Marcelo Tosatti8986ecc2009-05-12 18:55:45 -03006677 kvm_reload_remote_mmus(kvm);
Marcelo Tosatti34d4cb82008-07-10 20:49:31 -03006678}
6679
Zhang Xiantao1d737c82007-12-14 09:35:10 +08006680int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
6681{
Gleb Natapovaf585b92010-10-14 11:22:46 +02006682 return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
6683 !vcpu->arch.apf.halted)
6684 || !list_empty_careful(&vcpu->async_pf.done)
Gleb Natapova1b37102009-07-09 15:33:52 +03006685 || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
Avi Kivity7460fb4a2011-09-20 13:43:14 +03006686 || atomic_read(&vcpu->arch.nmi_queued) ||
Gleb Natapova1b37102009-07-09 15:33:52 +03006687 (kvm_arch_interrupt_allowed(vcpu) &&
6688 kvm_cpu_has_interrupt(vcpu));
Zhang Xiantao1d737c82007-12-14 09:35:10 +08006689}
Zhang Xiantao57361992007-12-17 14:21:40 +08006690
Zhang Xiantao57361992007-12-17 14:21:40 +08006691void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
6692{
Marcelo Tosatti32f88402009-05-07 17:55:12 -03006693 int me;
6694 int cpu = vcpu->cpu;
Zhang Xiantao57361992007-12-17 14:21:40 +08006695
6696 if (waitqueue_active(&vcpu->wq)) {
6697 wake_up_interruptible(&vcpu->wq);
6698 ++vcpu->stat.halt_wakeup;
6699 }
Marcelo Tosatti32f88402009-05-07 17:55:12 -03006700
6701 me = get_cpu();
6702 if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +08006703 if (kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE)
Marcelo Tosatti32f88402009-05-07 17:55:12 -03006704 smp_send_reschedule(cpu);
Marcelo Tosattie9571ed2008-04-11 15:01:22 -03006705 put_cpu();
Zhang Xiantao57361992007-12-17 14:21:40 +08006706}
Gleb Natapov78646122009-03-23 12:12:11 +02006707
6708int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
6709{
6710 return kvm_x86_ops->interrupt_allowed(vcpu);
6711}
Marcelo Tosatti229456f2009-06-17 09:22:14 -03006712
Jan Kiszkaf92653e2010-02-23 17:47:55 +01006713bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip)
6714{
6715 unsigned long current_rip = kvm_rip_read(vcpu) +
6716 get_segment_base(vcpu, VCPU_SREG_CS);
6717
6718 return current_rip == linear_rip;
6719}
6720EXPORT_SYMBOL_GPL(kvm_is_linear_rip);
6721
Jan Kiszka94fe45d2009-10-18 13:24:44 +02006722unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu)
6723{
6724 unsigned long rflags;
6725
6726 rflags = kvm_x86_ops->get_rflags(vcpu);
6727 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
Jan Kiszkac310bac2010-02-23 17:47:58 +01006728 rflags &= ~X86_EFLAGS_TF;
Jan Kiszka94fe45d2009-10-18 13:24:44 +02006729 return rflags;
6730}
6731EXPORT_SYMBOL_GPL(kvm_get_rflags);
6732
6733void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
6734{
6735 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP &&
Jan Kiszkaf92653e2010-02-23 17:47:55 +01006736 kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip))
Jan Kiszkac310bac2010-02-23 17:47:58 +01006737 rflags |= X86_EFLAGS_TF;
Jan Kiszka94fe45d2009-10-18 13:24:44 +02006738 kvm_x86_ops->set_rflags(vcpu, rflags);
Avi Kivity3842d132010-07-27 12:30:24 +03006739 kvm_make_request(KVM_REQ_EVENT, vcpu);
Jan Kiszka94fe45d2009-10-18 13:24:44 +02006740}
6741EXPORT_SYMBOL_GPL(kvm_set_rflags);
6742
Gleb Natapov56028d02010-10-17 18:13:42 +02006743void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work)
6744{
6745 int r;
6746
Xiao Guangrongfb67e142010-12-07 10:35:25 +08006747 if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) ||
Xiao Guangrongc4806ac2010-11-12 14:49:55 +08006748 is_error_page(work->page))
Gleb Natapov56028d02010-10-17 18:13:42 +02006749 return;
6750
6751 r = kvm_mmu_reload(vcpu);
6752 if (unlikely(r))
6753 return;
6754
Xiao Guangrongfb67e142010-12-07 10:35:25 +08006755 if (!vcpu->arch.mmu.direct_map &&
6756 work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu))
6757 return;
6758
Gleb Natapov56028d02010-10-17 18:13:42 +02006759 vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true);
6760}
6761
Gleb Natapovaf585b92010-10-14 11:22:46 +02006762static inline u32 kvm_async_pf_hash_fn(gfn_t gfn)
6763{
6764 return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU));
6765}
6766
6767static inline u32 kvm_async_pf_next_probe(u32 key)
6768{
6769 return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1);
6770}
6771
6772static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
6773{
6774 u32 key = kvm_async_pf_hash_fn(gfn);
6775
6776 while (vcpu->arch.apf.gfns[key] != ~0)
6777 key = kvm_async_pf_next_probe(key);
6778
6779 vcpu->arch.apf.gfns[key] = gfn;
6780}
6781
6782static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn)
6783{
6784 int i;
6785 u32 key = kvm_async_pf_hash_fn(gfn);
6786
6787 for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) &&
Xiao Guangrongc7d28c22010-11-01 17:00:30 +08006788 (vcpu->arch.apf.gfns[key] != gfn &&
6789 vcpu->arch.apf.gfns[key] != ~0); i++)
Gleb Natapovaf585b92010-10-14 11:22:46 +02006790 key = kvm_async_pf_next_probe(key);
6791
6792 return key;
6793}
6794
6795bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
6796{
6797 return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn;
6798}
6799
6800static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
6801{
6802 u32 i, j, k;
6803
6804 i = j = kvm_async_pf_gfn_slot(vcpu, gfn);
6805 while (true) {
6806 vcpu->arch.apf.gfns[i] = ~0;
6807 do {
6808 j = kvm_async_pf_next_probe(j);
6809 if (vcpu->arch.apf.gfns[j] == ~0)
6810 return;
6811 k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]);
6812 /*
6813 * k lies cyclically in ]i,j]
6814 * | i.k.j |
6815 * |....j i.k.| or |.k..j i...|
6816 */
6817 } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j));
6818 vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j];
6819 i = j;
6820 }
6821}
6822
Gleb Natapov7c907052010-10-14 11:22:53 +02006823static int apf_put_user(struct kvm_vcpu *vcpu, u32 val)
6824{
6825
6826 return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val,
6827 sizeof(val));
6828}
6829
Gleb Natapovaf585b92010-10-14 11:22:46 +02006830void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
6831 struct kvm_async_pf *work)
6832{
Avi Kivity6389ee92010-11-29 16:12:30 +02006833 struct x86_exception fault;
6834
Gleb Natapov7c907052010-10-14 11:22:53 +02006835 trace_kvm_async_pf_not_present(work->arch.token, work->gva);
Gleb Natapovaf585b92010-10-14 11:22:46 +02006836 kvm_add_async_pf_gfn(vcpu, work->arch.gfn);
Gleb Natapov7c907052010-10-14 11:22:53 +02006837
6838 if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) ||
Gleb Natapovfc5f06f2010-10-14 11:22:56 +02006839 (vcpu->arch.apf.send_user_only &&
6840 kvm_x86_ops->get_cpl(vcpu) == 0))
Gleb Natapov7c907052010-10-14 11:22:53 +02006841 kvm_make_request(KVM_REQ_APF_HALT, vcpu);
6842 else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) {
Avi Kivity6389ee92010-11-29 16:12:30 +02006843 fault.vector = PF_VECTOR;
6844 fault.error_code_valid = true;
6845 fault.error_code = 0;
6846 fault.nested_page_fault = false;
6847 fault.address = work->arch.token;
6848 kvm_inject_page_fault(vcpu, &fault);
Gleb Natapov7c907052010-10-14 11:22:53 +02006849 }
Gleb Natapovaf585b92010-10-14 11:22:46 +02006850}
6851
6852void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
6853 struct kvm_async_pf *work)
6854{
Avi Kivity6389ee92010-11-29 16:12:30 +02006855 struct x86_exception fault;
6856
Gleb Natapov7c907052010-10-14 11:22:53 +02006857 trace_kvm_async_pf_ready(work->arch.token, work->gva);
6858 if (is_error_page(work->page))
6859 work->arch.token = ~0; /* broadcast wakeup */
6860 else
6861 kvm_del_async_pf_gfn(vcpu, work->arch.gfn);
6862
6863 if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) &&
6864 !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) {
Avi Kivity6389ee92010-11-29 16:12:30 +02006865 fault.vector = PF_VECTOR;
6866 fault.error_code_valid = true;
6867 fault.error_code = 0;
6868 fault.nested_page_fault = false;
6869 fault.address = work->arch.token;
6870 kvm_inject_page_fault(vcpu, &fault);
Gleb Natapov7c907052010-10-14 11:22:53 +02006871 }
Xiao Guangronge6d53e32010-11-01 17:01:28 +08006872 vcpu->arch.apf.halted = false;
Gleb Natapov7c907052010-10-14 11:22:53 +02006873}
6874
6875bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
6876{
6877 if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED))
6878 return true;
6879 else
6880 return !kvm_event_needs_reinjection(vcpu) &&
6881 kvm_x86_ops->interrupt_allowed(vcpu);
Gleb Natapovaf585b92010-10-14 11:22:46 +02006882}
6883
Marcelo Tosatti229456f2009-06-17 09:22:14 -03006884EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
6885EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
6886EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
6887EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
6888EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
Joerg Roedel0ac406d2009-10-09 16:08:27 +02006889EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);
Joerg Roedeld8cabdd2009-10-09 16:08:28 +02006890EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
Joerg Roedel17897f362009-10-09 16:08:29 +02006891EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
Joerg Roedel236649d2009-10-09 16:08:30 +02006892EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
Joerg Roedelec1ff792009-10-09 16:08:31 +02006893EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
Joerg Roedel532a46b2009-10-09 16:08:32 +02006894EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);
Joerg Roedel2e554e82010-02-24 18:59:14 +01006895EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);