KVM: PPC: booke: category E.HV (GS-mode) support
Chips such as e500mc that implement category E.HV in Power ISA 2.06
provide hardware virtualization features, including a new MSR mode for
guest state. The guest OS can perform many operations without trapping
into the hypervisor, including transitions to and from guest userspace.
Since we can use SRR1[GS] to reliably tell whether an exception came from
guest state, instead of messing around with IVPR, we use DO_KVM similarly
to book3s.
Current issues include:
- Machine checks from guest state are not routed to the host handler.
- The guest can cause a host oops by executing an emulated instruction
in a page that lacks read permission. Existing e500/4xx support has
the same problem.
Includes work by Ashish Kalra <Ashish.Kalra@freescale.com>,
Varun Sethi <Varun.Sethi@freescale.com>, and
Liu Yu <yu.liu@freescale.com>.
Signed-off-by: Scott Wood <scottwood@freescale.com>
[agraf: remove pt_regs usage]
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 8f64709..2c33cd3 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -90,6 +90,9 @@
depends on KVM_BOOK3S_64 && !KVM_BOOK3S_64_HV
select KVM_BOOK3S_PR
+config KVM_BOOKE_HV
+ bool
+
config KVM_440
bool "KVM support for PowerPC 440 processors"
depends on EXPERIMENTAL && 44x
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 2ee9bae..75dbaeb 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -17,6 +17,8 @@
*
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
* Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
+ * Scott Wood <scottwood@freescale.com>
+ * Varun Sethi <varun.sethi@freescale.com>
*/
#include <linux/errno.h>
@@ -30,9 +32,12 @@
#include <asm/cputable.h>
#include <asm/uaccess.h>
#include <asm/kvm_ppc.h>
-#include "timing.h"
#include <asm/cacheflush.h>
+#include <asm/dbell.h>
+#include <asm/hw_irq.h>
+#include <asm/irq.h>
+#include "timing.h"
#include "booke.h"
unsigned long kvmppc_booke_handlers;
@@ -55,6 +60,8 @@
{ "dec", VCPU_STAT(dec_exits) },
{ "ext_intr", VCPU_STAT(ext_intr_exits) },
{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
+ { "doorbell", VCPU_STAT(dbell_exits) },
+ { "guest doorbell", VCPU_STAT(gdbell_exits) },
{ NULL }
};
@@ -121,6 +128,10 @@
{
u32 old_msr = vcpu->arch.shared->msr;
+#ifdef CONFIG_KVM_BOOKE_HV
+ new_msr |= MSR_GS;
+#endif
+
vcpu->arch.shared->msr = new_msr;
kvmppc_mmu_msr_notify(vcpu, old_msr);
@@ -195,6 +206,75 @@
clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
}
+static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
+{
+#ifdef CONFIG_KVM_BOOKE_HV
+ mtspr(SPRN_GSRR0, srr0);
+ mtspr(SPRN_GSRR1, srr1);
+#else
+ vcpu->arch.shared->srr0 = srr0;
+ vcpu->arch.shared->srr1 = srr1;
+#endif
+}
+
+static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
+{
+ vcpu->arch.csrr0 = srr0;
+ vcpu->arch.csrr1 = srr1;
+}
+
+static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
+{
+ if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
+ vcpu->arch.dsrr0 = srr0;
+ vcpu->arch.dsrr1 = srr1;
+ } else {
+ set_guest_csrr(vcpu, srr0, srr1);
+ }
+}
+
+static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
+{
+ vcpu->arch.mcsrr0 = srr0;
+ vcpu->arch.mcsrr1 = srr1;
+}
+
+static unsigned long get_guest_dear(struct kvm_vcpu *vcpu)
+{
+#ifdef CONFIG_KVM_BOOKE_HV
+ return mfspr(SPRN_GDEAR);
+#else
+ return vcpu->arch.shared->dar;
+#endif
+}
+
+static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear)
+{
+#ifdef CONFIG_KVM_BOOKE_HV
+ mtspr(SPRN_GDEAR, dear);
+#else
+ vcpu->arch.shared->dar = dear;
+#endif
+}
+
+static unsigned long get_guest_esr(struct kvm_vcpu *vcpu)
+{
+#ifdef CONFIG_KVM_BOOKE_HV
+ return mfspr(SPRN_GESR);
+#else
+ return vcpu->arch.shared->esr;
+#endif
+}
+
+static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr)
+{
+#ifdef CONFIG_KVM_BOOKE_HV
+ mtspr(SPRN_GESR, esr);
+#else
+ vcpu->arch.shared->esr = esr;
+#endif
+}
+
/* Deliver the interrupt of the corresponding priority, if possible. */
static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
unsigned int priority)
@@ -206,6 +286,7 @@
ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
bool crit;
bool keep_irq = false;
+ enum int_class int_class;
/* Truncate crit indicators in 32 bit mode */
if (!(vcpu->arch.shared->msr & MSR_SF)) {
@@ -241,16 +322,20 @@
case BOOKE_IRQPRIO_AP_UNAVAIL:
case BOOKE_IRQPRIO_ALIGNMENT:
allowed = 1;
- msr_mask = MSR_CE|MSR_ME|MSR_DE;
+ msr_mask = MSR_GS | MSR_CE | MSR_ME | MSR_DE;
+ int_class = INT_CLASS_NONCRIT;
break;
case BOOKE_IRQPRIO_CRITICAL:
- case BOOKE_IRQPRIO_WATCHDOG:
allowed = vcpu->arch.shared->msr & MSR_CE;
- msr_mask = MSR_ME;
+ allowed = allowed && !crit;
+ msr_mask = MSR_GS | MSR_ME;
+ int_class = INT_CLASS_CRIT;
break;
case BOOKE_IRQPRIO_MACHINE_CHECK:
allowed = vcpu->arch.shared->msr & MSR_ME;
- msr_mask = 0;
+ allowed = allowed && !crit;
+ msr_mask = MSR_GS;
+ int_class = INT_CLASS_MC;
break;
case BOOKE_IRQPRIO_DECREMENTER:
case BOOKE_IRQPRIO_FIT:
@@ -259,28 +344,62 @@
case BOOKE_IRQPRIO_EXTERNAL:
allowed = vcpu->arch.shared->msr & MSR_EE;
allowed = allowed && !crit;
- msr_mask = MSR_CE|MSR_ME|MSR_DE;
+ msr_mask = MSR_GS | MSR_CE | MSR_ME | MSR_DE;
+ int_class = INT_CLASS_NONCRIT;
break;
case BOOKE_IRQPRIO_DEBUG:
allowed = vcpu->arch.shared->msr & MSR_DE;
- msr_mask = MSR_ME;
+ allowed = allowed && !crit;
+ msr_mask = MSR_GS | MSR_ME;
+ int_class = INT_CLASS_CRIT;
break;
}
if (allowed) {
- vcpu->arch.shared->srr0 = vcpu->arch.pc;
- vcpu->arch.shared->srr1 = vcpu->arch.shared->msr;
+ switch (int_class) {
+ case INT_CLASS_NONCRIT:
+ set_guest_srr(vcpu, vcpu->arch.pc,
+ vcpu->arch.shared->msr);
+ break;
+ case INT_CLASS_CRIT:
+ set_guest_csrr(vcpu, vcpu->arch.pc,
+ vcpu->arch.shared->msr);
+ break;
+ case INT_CLASS_DBG:
+ set_guest_dsrr(vcpu, vcpu->arch.pc,
+ vcpu->arch.shared->msr);
+ break;
+ case INT_CLASS_MC:
+ set_guest_mcsrr(vcpu, vcpu->arch.pc,
+ vcpu->arch.shared->msr);
+ break;
+ }
+
vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
if (update_esr == true)
- vcpu->arch.shared->esr = vcpu->arch.queued_esr;
+ set_guest_esr(vcpu, vcpu->arch.queued_esr);
if (update_dear == true)
- vcpu->arch.shared->dar = vcpu->arch.queued_dear;
+ set_guest_dear(vcpu, vcpu->arch.queued_dear);
kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
if (!keep_irq)
clear_bit(priority, &vcpu->arch.pending_exceptions);
}
+#ifdef CONFIG_KVM_BOOKE_HV
+ /*
+ * If an interrupt is pending but masked, raise a guest doorbell
+ * so that we are notified when the guest enables the relevant
+ * MSR bit.
+ */
+ if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
+ kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
+ if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
+ kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
+ if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
+ kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
+#endif
+
return allowed;
}
@@ -344,6 +463,11 @@
return -EINVAL;
}
+ if (!current->thread.kvm_vcpu) {
+ WARN(1, "no vcpu\n");
+ return -EPERM;
+ }
+
local_irq_disable();
kvmppc_core_prepare_to_enter(vcpu);
@@ -363,6 +487,38 @@
return ret;
}
+static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
+{
+ enum emulation_result er;
+
+ er = kvmppc_emulate_instruction(run, vcpu);
+ switch (er) {
+ case EMULATE_DONE:
+ /* don't overwrite subtypes, just account kvm_stats */
+ kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
+ /* Future optimization: only reload non-volatiles if
+ * they were actually modified by emulation. */
+ return RESUME_GUEST_NV;
+
+ case EMULATE_DO_DCR:
+ run->exit_reason = KVM_EXIT_DCR;
+ return RESUME_HOST;
+
+ case EMULATE_FAIL:
+ /* XXX Deliver Program interrupt to guest. */
+ printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
+ __func__, vcpu->arch.pc, vcpu->arch.last_inst);
+ /* For debugging, encode the failing instruction and
+ * report it to userspace. */
+ run->hw.hardware_exit_reason = ~0ULL << 32;
+ run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
+ return RESUME_HOST;
+
+ default:
+ BUG();
+ }
+}
+
/**
* kvmppc_handle_exit
*
@@ -371,12 +527,30 @@
int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int exit_nr)
{
- enum emulation_result er;
int r = RESUME_HOST;
/* update before a new last_exit_type is rewritten */
kvmppc_update_timing_stats(vcpu);
+ switch (exit_nr) {
+ case BOOKE_INTERRUPT_EXTERNAL:
+ do_IRQ(current->thread.regs);
+ break;
+
+ case BOOKE_INTERRUPT_DECREMENTER:
+ timer_interrupt(current->thread.regs);
+ break;
+
+#if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64)
+ case BOOKE_INTERRUPT_DOORBELL:
+ doorbell_exception(current->thread.regs);
+ break;
+#endif
+ case BOOKE_INTERRUPT_MACHINE_CHECK:
+ /* FIXME */
+ break;
+ }
+
local_irq_enable();
run->exit_reason = KVM_EXIT_UNKNOWN;
@@ -384,30 +558,56 @@
switch (exit_nr) {
case BOOKE_INTERRUPT_MACHINE_CHECK:
- printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
- kvmppc_dump_vcpu(vcpu);
- r = RESUME_HOST;
+ kvm_resched(vcpu);
+ r = RESUME_GUEST;
break;
case BOOKE_INTERRUPT_EXTERNAL:
kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
- if (need_resched())
- cond_resched();
+ kvm_resched(vcpu);
r = RESUME_GUEST;
break;
case BOOKE_INTERRUPT_DECREMENTER:
- /* Since we switched IVPR back to the host's value, the host
- * handled this interrupt the moment we enabled interrupts.
- * Now we just offer it a chance to reschedule the guest. */
kvmppc_account_exit(vcpu, DEC_EXITS);
- if (need_resched())
- cond_resched();
+ kvm_resched(vcpu);
r = RESUME_GUEST;
break;
+ case BOOKE_INTERRUPT_DOORBELL:
+ kvmppc_account_exit(vcpu, DBELL_EXITS);
+ kvm_resched(vcpu);
+ r = RESUME_GUEST;
+ break;
+
+ case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
+ kvmppc_account_exit(vcpu, GDBELL_EXITS);
+
+ /*
+ * We are here because there is a pending guest interrupt
+ * which could not be delivered as MSR_CE or MSR_ME was not
+ * set. Once we break from here we will retry delivery.
+ */
+ r = RESUME_GUEST;
+ break;
+
+ case BOOKE_INTERRUPT_GUEST_DBELL:
+ kvmppc_account_exit(vcpu, GDBELL_EXITS);
+
+ /*
+ * We are here because there is a pending guest interrupt
+ * which could not be delivered as MSR_EE was not set. Once
+ * we break from here we will retry delivery.
+ */
+ r = RESUME_GUEST;
+ break;
+
+ case BOOKE_INTERRUPT_HV_PRIV:
+ r = emulation_exit(run, vcpu);
+ break;
+
case BOOKE_INTERRUPT_PROGRAM:
- if (vcpu->arch.shared->msr & MSR_PR) {
+ if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
/* Program traps generated by user-level software must be handled
* by the guest kernel. */
kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
@@ -416,32 +616,7 @@
break;
}
- er = kvmppc_emulate_instruction(run, vcpu);
- switch (er) {
- case EMULATE_DONE:
- /* don't overwrite subtypes, just account kvm_stats */
- kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
- /* Future optimization: only reload non-volatiles if
- * they were actually modified by emulation. */
- r = RESUME_GUEST_NV;
- break;
- case EMULATE_DO_DCR:
- run->exit_reason = KVM_EXIT_DCR;
- r = RESUME_HOST;
- break;
- case EMULATE_FAIL:
- /* XXX Deliver Program interrupt to guest. */
- printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
- __func__, vcpu->arch.pc, vcpu->arch.last_inst);
- /* For debugging, encode the failing instruction and
- * report it to userspace. */
- run->hw.hardware_exit_reason = ~0ULL << 32;
- run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
- r = RESUME_HOST;
- break;
- default:
- BUG();
- }
+ r = emulation_exit(run, vcpu);
break;
case BOOKE_INTERRUPT_FP_UNAVAIL:
@@ -506,6 +681,21 @@
r = RESUME_GUEST;
break;
+#ifdef CONFIG_KVM_BOOKE_HV
+ case BOOKE_INTERRUPT_HV_SYSCALL:
+ if (!(vcpu->arch.shared->msr & MSR_PR)) {
+ kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
+ } else {
+ /*
+ * hcall from guest userspace -- send privileged
+ * instruction program check.
+ */
+ kvmppc_core_queue_program(vcpu, ESR_PPR);
+ }
+
+ r = RESUME_GUEST;
+ break;
+#else
case BOOKE_INTERRUPT_SYSCALL:
if (!(vcpu->arch.shared->msr & MSR_PR) &&
(((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
@@ -519,6 +709,7 @@
kvmppc_account_exit(vcpu, SYSCALL_EXITS);
r = RESUME_GUEST;
break;
+#endif
case BOOKE_INTERRUPT_DTLB_MISS: {
unsigned long eaddr = vcpu->arch.fault_dear;
@@ -659,12 +850,15 @@
int r;
vcpu->arch.pc = 0;
- vcpu->arch.shared->msr = 0;
- vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
vcpu->arch.shared->pir = vcpu->vcpu_id;
kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
+ kvmppc_set_msr(vcpu, 0);
+#ifndef CONFIG_KVM_BOOKE_HV
+ vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
vcpu->arch.shadow_pid = 1;
+ vcpu->arch.shared->msr = 0;
+#endif
/* Eye-catching numbers so we know if the guest takes an interrupt
* before it's programmed its own IVPR/IVORs. */
@@ -745,8 +939,8 @@
sregs->u.e.csrr0 = vcpu->arch.csrr0;
sregs->u.e.csrr1 = vcpu->arch.csrr1;
sregs->u.e.mcsr = vcpu->arch.mcsr;
- sregs->u.e.esr = vcpu->arch.shared->esr;
- sregs->u.e.dear = vcpu->arch.shared->dar;
+ sregs->u.e.esr = get_guest_esr(vcpu);
+ sregs->u.e.dear = get_guest_dear(vcpu);
sregs->u.e.tsr = vcpu->arch.tsr;
sregs->u.e.tcr = vcpu->arch.tcr;
sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
@@ -763,8 +957,8 @@
vcpu->arch.csrr0 = sregs->u.e.csrr0;
vcpu->arch.csrr1 = sregs->u.e.csrr1;
vcpu->arch.mcsr = sregs->u.e.mcsr;
- vcpu->arch.shared->esr = sregs->u.e.esr;
- vcpu->arch.shared->dar = sregs->u.e.dear;
+ set_guest_esr(vcpu, sregs->u.e.esr);
+ set_guest_dear(vcpu, sregs->u.e.dear);
vcpu->arch.vrsave = sregs->u.e.vrsave;
kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
@@ -961,14 +1155,17 @@
void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
+ current->thread.kvm_vcpu = vcpu;
}
void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
{
+ current->thread.kvm_vcpu = NULL;
}
int __init kvmppc_booke_init(void)
{
+#ifndef CONFIG_KVM_BOOKE_HV
unsigned long ivor[16];
unsigned long max_ivor = 0;
int i;
@@ -1011,7 +1208,7 @@
}
flush_icache_range(kvmppc_booke_handlers,
kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
-
+#endif /* !BOOKE_HV */
return 0;
}
diff --git a/arch/powerpc/kvm/booke.h b/arch/powerpc/kvm/booke.h
index 05d1d99..d53bcf2 100644
--- a/arch/powerpc/kvm/booke.h
+++ b/arch/powerpc/kvm/booke.h
@@ -48,7 +48,20 @@
#define BOOKE_IRQPRIO_PERFORMANCE_MONITOR 19
/* Internal pseudo-irqprio for level triggered externals */
#define BOOKE_IRQPRIO_EXTERNAL_LEVEL 20
-#define BOOKE_IRQPRIO_MAX 20
+#define BOOKE_IRQPRIO_DBELL 21
+#define BOOKE_IRQPRIO_DBELL_CRIT 22
+#define BOOKE_IRQPRIO_MAX 23
+
+#define BOOKE_IRQMASK_EE ((1 << BOOKE_IRQPRIO_EXTERNAL_LEVEL) | \
+ (1 << BOOKE_IRQPRIO_PERFORMANCE_MONITOR) | \
+ (1 << BOOKE_IRQPRIO_DBELL) | \
+ (1 << BOOKE_IRQPRIO_DECREMENTER) | \
+ (1 << BOOKE_IRQPRIO_FIT) | \
+ (1 << BOOKE_IRQPRIO_EXTERNAL))
+
+#define BOOKE_IRQMASK_CE ((1 << BOOKE_IRQPRIO_DBELL_CRIT) | \
+ (1 << BOOKE_IRQPRIO_WATCHDOG) | \
+ (1 << BOOKE_IRQPRIO_CRITICAL))
extern unsigned long kvmppc_booke_handlers;
@@ -74,4 +87,13 @@
void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu);
+enum int_class {
+ INT_CLASS_NONCRIT,
+ INT_CLASS_CRIT,
+ INT_CLASS_MC,
+ INT_CLASS_DBG,
+};
+
+void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type);
+
#endif /* __KVM_BOOKE_H__ */
diff --git a/arch/powerpc/kvm/booke_emulate.c b/arch/powerpc/kvm/booke_emulate.c
index 3e652da..904412b 100644
--- a/arch/powerpc/kvm/booke_emulate.c
+++ b/arch/powerpc/kvm/booke_emulate.c
@@ -99,6 +99,12 @@
return emulated;
}
+/*
+ * NOTE: some of these registers are not emulated on BOOKE_HV (GS-mode).
+ * Their backing store is in real registers, and these functions
+ * will return the wrong result if called for them in another context
+ * (such as debugging).
+ */
int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
{
int emulated = EMULATE_DONE;
@@ -122,9 +128,11 @@
kvmppc_set_tcr(vcpu, spr_val);
break;
- /* Note: SPRG4-7 are user-readable. These values are
- * loaded into the real SPRGs when resuming the
- * guest. */
+ /*
+ * Note: SPRG4-7 are user-readable.
+ * These values are loaded into the real SPRGs when resuming the
+ * guest (PR-mode only).
+ */
case SPRN_SPRG4:
vcpu->arch.shared->sprg4 = spr_val; break;
case SPRN_SPRG5:
@@ -136,6 +144,9 @@
case SPRN_IVPR:
vcpu->arch.ivpr = spr_val;
+#ifdef CONFIG_KVM_BOOKE_HV
+ mtspr(SPRN_GIVPR, spr_val);
+#endif
break;
case SPRN_IVOR0:
vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = spr_val;
@@ -145,6 +156,9 @@
break;
case SPRN_IVOR2:
vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = spr_val;
+#ifdef CONFIG_KVM_BOOKE_HV
+ mtspr(SPRN_GIVOR2, spr_val);
+#endif
break;
case SPRN_IVOR3:
vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = spr_val;
@@ -163,6 +177,9 @@
break;
case SPRN_IVOR8:
vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = spr_val;
+#ifdef CONFIG_KVM_BOOKE_HV
+ mtspr(SPRN_GIVOR8, spr_val);
+#endif
break;
case SPRN_IVOR9:
vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = spr_val;
diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S
new file mode 100644
index 0000000..9eaeebd
--- /dev/null
+++ b/arch/powerpc/kvm/bookehv_interrupts.S
@@ -0,0 +1,587 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
+ *
+ * Author: Varun Sethi <varun.sethi@freescale.com>
+ * Author: Scott Wood <scotwood@freescale.com>
+ *
+ * This file is derived from arch/powerpc/kvm/booke_interrupts.S
+ */
+
+#include <asm/ppc_asm.h>
+#include <asm/kvm_asm.h>
+#include <asm/reg.h>
+#include <asm/mmu-44x.h>
+#include <asm/page.h>
+#include <asm/asm-compat.h>
+#include <asm/asm-offsets.h>
+#include <asm/bitsperlong.h>
+
+#include "../kernel/head_booke.h" /* for THREAD_NORMSAVE() */
+
+#define GET_VCPU(vcpu, thread) \
+ PPC_LL vcpu, THREAD_KVM_VCPU(thread)
+
+#define SET_VCPU(vcpu) \
+ PPC_STL vcpu, (THREAD + THREAD_KVM_VCPU)(r2)
+
+#define LONGBYTES (BITS_PER_LONG / 8)
+
+#define VCPU_GPR(n) (VCPU_GPRS + (n * LONGBYTES))
+#define VCPU_GUEST_SPRG(n) (VCPU_GUEST_SPRGS + (n * LONGBYTES))
+
+/* The host stack layout: */
+#define HOST_R1 (0 * LONGBYTES) /* Implied by stwu. */
+#define HOST_CALLEE_LR (1 * LONGBYTES)
+#define HOST_RUN (2 * LONGBYTES) /* struct kvm_run */
+/*
+ * r2 is special: it holds 'current', and it made nonvolatile in the
+ * kernel with the -ffixed-r2 gcc option.
+ */
+#define HOST_R2 (3 * LONGBYTES)
+#define HOST_NV_GPRS (4 * LONGBYTES)
+#define HOST_NV_GPR(n) (HOST_NV_GPRS + ((n - 14) * LONGBYTES))
+#define HOST_MIN_STACK_SIZE (HOST_NV_GPR(31) + LONGBYTES)
+#define HOST_STACK_SIZE ((HOST_MIN_STACK_SIZE + 15) & ~15) /* Align. */
+#define HOST_STACK_LR (HOST_STACK_SIZE + LONGBYTES) /* In caller stack frame. */
+
+#define NEED_EMU 0x00000001 /* emulation -- save nv regs */
+#define NEED_DEAR 0x00000002 /* save faulting DEAR */
+#define NEED_ESR 0x00000004 /* save faulting ESR */
+
+/*
+ * On entry:
+ * r4 = vcpu, r5 = srr0, r6 = srr1
+ * saved in vcpu: cr, ctr, r3-r13
+ */
+.macro kvm_handler_common intno, srr0, flags
+ mfspr r10, SPRN_PID
+ lwz r8, VCPU_HOST_PID(r4)
+ PPC_LL r11, VCPU_SHARED(r4)
+ PPC_STL r14, VCPU_GPR(r14)(r4) /* We need a non-volatile GPR. */
+ li r14, \intno
+
+ stw r10, VCPU_GUEST_PID(r4)
+ mtspr SPRN_PID, r8
+
+ .if \flags & NEED_EMU
+ lwz r9, VCPU_KVM(r4)
+ .endif
+
+#ifdef CONFIG_KVM_EXIT_TIMING
+ /* save exit time */
+1: mfspr r7, SPRN_TBRU
+ mfspr r8, SPRN_TBRL
+ mfspr r9, SPRN_TBRU
+ cmpw r9, r7
+ PPC_STL r8, VCPU_TIMING_EXIT_TBL(r4)
+ bne- 1b
+ PPC_STL r9, VCPU_TIMING_EXIT_TBU(r4)
+#endif
+
+ oris r8, r6, MSR_CE@h
+#ifndef CONFIG_64BIT
+ stw r6, (VCPU_SHARED_MSR + 4)(r11)
+#else
+ std r6, (VCPU_SHARED_MSR)(r11)
+#endif
+ ori r8, r8, MSR_ME | MSR_RI
+ PPC_STL r5, VCPU_PC(r4)
+
+ /*
+ * Make sure CE/ME/RI are set (if appropriate for exception type)
+ * whether or not the guest had it set. Since mfmsr/mtmsr are
+ * somewhat expensive, skip in the common case where the guest
+ * had all these bits set (and thus they're still set if
+ * appropriate for the exception type).
+ */
+ cmpw r6, r8
+ .if \flags & NEED_EMU
+ lwz r9, KVM_LPID(r9)
+ .endif
+ beq 1f
+ mfmsr r7
+ .if \srr0 != SPRN_MCSRR0 && \srr0 != SPRN_CSRR0
+ oris r7, r7, MSR_CE@h
+ .endif
+ .if \srr0 != SPRN_MCSRR0
+ ori r7, r7, MSR_ME | MSR_RI
+ .endif
+ mtmsr r7
+1:
+
+ .if \flags & NEED_EMU
+ /*
+ * This assumes you have external PID support.
+ * To support a bookehv CPU without external PID, you'll
+ * need to look up the TLB entry and create a temporary mapping.
+ *
+ * FIXME: we don't currently handle if the lwepx faults. PR-mode
+ * booke doesn't handle it either. Since Linux doesn't use
+ * broadcast tlbivax anymore, the only way this should happen is
+ * if the guest maps its memory execute-but-not-read, or if we
+ * somehow take a TLB miss in the middle of this entry code and
+ * evict the relevant entry. On e500mc, all kernel lowmem is
+ * bolted into TLB1 large page mappings, and we don't use
+ * broadcast invalidates, so we should not take a TLB miss here.
+ *
+ * Later we'll need to deal with faults here. Disallowing guest
+ * mappings that are execute-but-not-read could be an option on
+ * e500mc, but not on chips with an LRAT if it is used.
+ */
+
+ mfspr r3, SPRN_EPLC /* will already have correct ELPID and EGS */
+ PPC_STL r15, VCPU_GPR(r15)(r4)
+ PPC_STL r16, VCPU_GPR(r16)(r4)
+ PPC_STL r17, VCPU_GPR(r17)(r4)
+ PPC_STL r18, VCPU_GPR(r18)(r4)
+ PPC_STL r19, VCPU_GPR(r19)(r4)
+ mr r8, r3
+ PPC_STL r20, VCPU_GPR(r20)(r4)
+ rlwimi r8, r6, EPC_EAS_SHIFT - MSR_IR_LG, EPC_EAS
+ PPC_STL r21, VCPU_GPR(r21)(r4)
+ rlwimi r8, r6, EPC_EPR_SHIFT - MSR_PR_LG, EPC_EPR
+ PPC_STL r22, VCPU_GPR(r22)(r4)
+ rlwimi r8, r10, EPC_EPID_SHIFT, EPC_EPID
+ PPC_STL r23, VCPU_GPR(r23)(r4)
+ PPC_STL r24, VCPU_GPR(r24)(r4)
+ PPC_STL r25, VCPU_GPR(r25)(r4)
+ PPC_STL r26, VCPU_GPR(r26)(r4)
+ PPC_STL r27, VCPU_GPR(r27)(r4)
+ PPC_STL r28, VCPU_GPR(r28)(r4)
+ PPC_STL r29, VCPU_GPR(r29)(r4)
+ PPC_STL r30, VCPU_GPR(r30)(r4)
+ PPC_STL r31, VCPU_GPR(r31)(r4)
+ mtspr SPRN_EPLC, r8
+ isync
+ lwepx r9, 0, r5
+ mtspr SPRN_EPLC, r3
+ stw r9, VCPU_LAST_INST(r4)
+ .endif
+
+ .if \flags & NEED_ESR
+ mfspr r8, SPRN_ESR
+ PPC_STL r8, VCPU_FAULT_ESR(r4)
+ .endif
+
+ .if \flags & NEED_DEAR
+ mfspr r9, SPRN_DEAR
+ PPC_STL r9, VCPU_FAULT_DEAR(r4)
+ .endif
+
+ b kvmppc_resume_host
+.endm
+
+/*
+ * For input register values, see arch/powerpc/include/asm/kvm_booke_hv_asm.h
+ */
+.macro kvm_handler intno srr0, srr1, flags
+_GLOBAL(kvmppc_handler_\intno\()_\srr1)
+ GET_VCPU(r11, r10)
+ PPC_STL r3, VCPU_GPR(r3)(r11)
+ mfspr r3, SPRN_SPRG_RSCRATCH0
+ PPC_STL r4, VCPU_GPR(r4)(r11)
+ PPC_LL r4, THREAD_NORMSAVE(0)(r10)
+ PPC_STL r5, VCPU_GPR(r5)(r11)
+ PPC_STL r13, VCPU_CR(r11)
+ mfspr r5, \srr0
+ PPC_STL r3, VCPU_GPR(r10)(r11)
+ PPC_LL r3, THREAD_NORMSAVE(2)(r10)
+ PPC_STL r6, VCPU_GPR(r6)(r11)
+ PPC_STL r4, VCPU_GPR(r11)(r11)
+ mfspr r6, \srr1
+ PPC_STL r7, VCPU_GPR(r7)(r11)
+ PPC_STL r8, VCPU_GPR(r8)(r11)
+ PPC_STL r9, VCPU_GPR(r9)(r11)
+ PPC_STL r3, VCPU_GPR(r13)(r11)
+ mfctr r7
+ PPC_STL r12, VCPU_GPR(r12)(r11)
+ PPC_STL r7, VCPU_CTR(r11)
+ mr r4, r11
+ kvm_handler_common \intno, \srr0, \flags
+.endm
+
+.macro kvm_lvl_handler intno scratch srr0, srr1, flags
+_GLOBAL(kvmppc_handler_\intno\()_\srr1)
+ mfspr r10, SPRN_SPRG_THREAD
+ GET_VCPU(r11, r10)
+ PPC_STL r3, VCPU_GPR(r3)(r11)
+ mfspr r3, \scratch
+ PPC_STL r4, VCPU_GPR(r4)(r11)
+ PPC_LL r4, GPR9(r8)
+ PPC_STL r5, VCPU_GPR(r5)(r11)
+ PPC_STL r9, VCPU_CR(r11)
+ mfspr r5, \srr0
+ PPC_STL r3, VCPU_GPR(r8)(r11)
+ PPC_LL r3, GPR10(r8)
+ PPC_STL r6, VCPU_GPR(r6)(r11)
+ PPC_STL r4, VCPU_GPR(r9)(r11)
+ mfspr r6, \srr1
+ PPC_LL r4, GPR11(r8)
+ PPC_STL r7, VCPU_GPR(r7)(r11)
+ PPC_STL r8, VCPU_GPR(r8)(r11)
+ PPC_STL r3, VCPU_GPR(r10)(r11)
+ mfctr r7
+ PPC_STL r12, VCPU_GPR(r12)(r11)
+ PPC_STL r4, VCPU_GPR(r11)(r11)
+ PPC_STL r7, VCPU_CTR(r11)
+ mr r4, r11
+ kvm_handler_common \intno, \srr0, \flags
+.endm
+
+kvm_lvl_handler BOOKE_INTERRUPT_CRITICAL, \
+ SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
+kvm_lvl_handler BOOKE_INTERRUPT_MACHINE_CHECK, \
+ SPRN_SPRG_RSCRATCH_MC, SPRN_MCSRR0, SPRN_MCSRR1, 0
+kvm_handler BOOKE_INTERRUPT_DATA_STORAGE, \
+ SPRN_SRR0, SPRN_SRR1, (NEED_EMU | NEED_DEAR)
+kvm_handler BOOKE_INTERRUPT_INST_STORAGE, SPRN_SRR0, SPRN_SRR1, NEED_ESR
+kvm_handler BOOKE_INTERRUPT_EXTERNAL, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_ALIGNMENT, \
+ SPRN_SRR0, SPRN_SRR1, (NEED_DEAR | NEED_ESR)
+kvm_handler BOOKE_INTERRUPT_PROGRAM, SPRN_SRR0, SPRN_SRR1, NEED_ESR
+kvm_handler BOOKE_INTERRUPT_FP_UNAVAIL, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_SYSCALL, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_AP_UNAVAIL, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_DECREMENTER, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_FIT, SPRN_SRR0, SPRN_SRR1, 0
+kvm_lvl_handler BOOKE_INTERRUPT_WATCHDOG, \
+ SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
+kvm_handler BOOKE_INTERRUPT_DTLB_MISS, \
+ SPRN_SRR0, SPRN_SRR1, (NEED_EMU | NEED_DEAR | NEED_ESR)
+kvm_handler BOOKE_INTERRUPT_ITLB_MISS, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_SPE_UNAVAIL, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_SPE_FP_DATA, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_SPE_FP_ROUND, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_PERFORMANCE_MONITOR, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_DOORBELL, SPRN_SRR0, SPRN_SRR1, 0
+kvm_lvl_handler BOOKE_INTERRUPT_DOORBELL_CRITICAL, \
+ SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
+kvm_handler BOOKE_INTERRUPT_HV_PRIV, SPRN_SRR0, SPRN_SRR1, NEED_EMU
+kvm_handler BOOKE_INTERRUPT_HV_SYSCALL, SPRN_SRR0, SPRN_SRR1, 0
+kvm_handler BOOKE_INTERRUPT_GUEST_DBELL, SPRN_GSRR0, SPRN_GSRR1, 0
+kvm_lvl_handler BOOKE_INTERRUPT_GUEST_DBELL_CRIT, \
+ SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
+kvm_lvl_handler BOOKE_INTERRUPT_DEBUG, \
+ SPRN_SPRG_RSCRATCH_CRIT, SPRN_CSRR0, SPRN_CSRR1, 0
+kvm_lvl_handler BOOKE_INTERRUPT_DEBUG, \
+ SPRN_SPRG_RSCRATCH_DBG, SPRN_DSRR0, SPRN_DSRR1, 0
+
+
+/* Registers:
+ * SPRG_SCRATCH0: guest r10
+ * r4: vcpu pointer
+ * r11: vcpu->arch.shared
+ * r14: KVM exit number
+ */
+_GLOBAL(kvmppc_resume_host)
+ /* Save remaining volatile guest register state to vcpu. */
+ mfspr r3, SPRN_VRSAVE
+ PPC_STL r0, VCPU_GPR(r0)(r4)
+ PPC_STL r1, VCPU_GPR(r1)(r4)
+ mflr r5
+ mfspr r6, SPRN_SPRG4
+ PPC_STL r2, VCPU_GPR(r2)(r4)
+ PPC_STL r5, VCPU_LR(r4)
+ mfspr r7, SPRN_SPRG5
+ PPC_STL r3, VCPU_VRSAVE(r4)
+ PPC_STL r6, VCPU_SHARED_SPRG4(r11)
+ mfspr r8, SPRN_SPRG6
+ PPC_STL r7, VCPU_SHARED_SPRG5(r11)
+ mfspr r9, SPRN_SPRG7
+ PPC_STL r8, VCPU_SHARED_SPRG6(r11)
+ mfxer r3
+ PPC_STL r9, VCPU_SHARED_SPRG7(r11)
+
+ /* save guest MAS registers and restore host mas4 & mas6 */
+ mfspr r5, SPRN_MAS0
+ PPC_STL r3, VCPU_XER(r4)
+ mfspr r6, SPRN_MAS1
+ stw r5, VCPU_SHARED_MAS0(r11)
+ mfspr r7, SPRN_MAS2
+ stw r6, VCPU_SHARED_MAS1(r11)
+#ifndef CONFIG_64BIT
+ stw r7, (VCPU_SHARED_MAS2 + 4)(r11)
+#else
+ std r7, (VCPU_SHARED_MAS2)(r11)
+#endif
+ mfspr r5, SPRN_MAS3
+ mfspr r6, SPRN_MAS4
+ stw r5, VCPU_SHARED_MAS7_3+4(r11)
+ mfspr r7, SPRN_MAS6
+ stw r6, VCPU_SHARED_MAS4(r11)
+ mfspr r5, SPRN_MAS7
+ lwz r6, VCPU_HOST_MAS4(r4)
+ stw r7, VCPU_SHARED_MAS6(r11)
+ lwz r8, VCPU_HOST_MAS6(r4)
+ mtspr SPRN_MAS4, r6
+ stw r5, VCPU_SHARED_MAS7_3+0(r11)
+ mtspr SPRN_MAS6, r8
+ mfspr r3, SPRN_EPCR
+ rlwinm r3, r3, 0, ~SPRN_EPCR_DMIUH
+ mtspr SPRN_EPCR, r3
+ isync
+
+ /* Restore host stack pointer */
+ PPC_LL r1, VCPU_HOST_STACK(r4)
+ PPC_LL r2, HOST_R2(r1)
+
+ /* Switch to kernel stack and jump to handler. */
+ PPC_LL r3, HOST_RUN(r1)
+ mr r5, r14 /* intno */
+ mr r14, r4 /* Save vcpu pointer. */
+ bl kvmppc_handle_exit
+
+ /* Restore vcpu pointer and the nonvolatiles we used. */
+ mr r4, r14
+ PPC_LL r14, VCPU_GPR(r14)(r4)
+
+ andi. r5, r3, RESUME_FLAG_NV
+ beq skip_nv_load
+ PPC_LL r15, VCPU_GPR(r15)(r4)
+ PPC_LL r16, VCPU_GPR(r16)(r4)
+ PPC_LL r17, VCPU_GPR(r17)(r4)
+ PPC_LL r18, VCPU_GPR(r18)(r4)
+ PPC_LL r19, VCPU_GPR(r19)(r4)
+ PPC_LL r20, VCPU_GPR(r20)(r4)
+ PPC_LL r21, VCPU_GPR(r21)(r4)
+ PPC_LL r22, VCPU_GPR(r22)(r4)
+ PPC_LL r23, VCPU_GPR(r23)(r4)
+ PPC_LL r24, VCPU_GPR(r24)(r4)
+ PPC_LL r25, VCPU_GPR(r25)(r4)
+ PPC_LL r26, VCPU_GPR(r26)(r4)
+ PPC_LL r27, VCPU_GPR(r27)(r4)
+ PPC_LL r28, VCPU_GPR(r28)(r4)
+ PPC_LL r29, VCPU_GPR(r29)(r4)
+ PPC_LL r30, VCPU_GPR(r30)(r4)
+ PPC_LL r31, VCPU_GPR(r31)(r4)
+skip_nv_load:
+ /* Should we return to the guest? */
+ andi. r5, r3, RESUME_FLAG_HOST
+ beq lightweight_exit
+
+ srawi r3, r3, 2 /* Shift -ERR back down. */
+
+heavyweight_exit:
+ /* Not returning to guest. */
+ PPC_LL r5, HOST_STACK_LR(r1)
+
+ /*
+ * We already saved guest volatile register state; now save the
+ * non-volatiles.
+ */
+
+ PPC_STL r15, VCPU_GPR(r15)(r4)
+ PPC_STL r16, VCPU_GPR(r16)(r4)
+ PPC_STL r17, VCPU_GPR(r17)(r4)
+ PPC_STL r18, VCPU_GPR(r18)(r4)
+ PPC_STL r19, VCPU_GPR(r19)(r4)
+ PPC_STL r20, VCPU_GPR(r20)(r4)
+ PPC_STL r21, VCPU_GPR(r21)(r4)
+ PPC_STL r22, VCPU_GPR(r22)(r4)
+ PPC_STL r23, VCPU_GPR(r23)(r4)
+ PPC_STL r24, VCPU_GPR(r24)(r4)
+ PPC_STL r25, VCPU_GPR(r25)(r4)
+ PPC_STL r26, VCPU_GPR(r26)(r4)
+ PPC_STL r27, VCPU_GPR(r27)(r4)
+ PPC_STL r28, VCPU_GPR(r28)(r4)
+ PPC_STL r29, VCPU_GPR(r29)(r4)
+ PPC_STL r30, VCPU_GPR(r30)(r4)
+ PPC_STL r31, VCPU_GPR(r31)(r4)
+
+ /* Load host non-volatile register state from host stack. */
+ PPC_LL r14, HOST_NV_GPR(r14)(r1)
+ PPC_LL r15, HOST_NV_GPR(r15)(r1)
+ PPC_LL r16, HOST_NV_GPR(r16)(r1)
+ PPC_LL r17, HOST_NV_GPR(r17)(r1)
+ PPC_LL r18, HOST_NV_GPR(r18)(r1)
+ PPC_LL r19, HOST_NV_GPR(r19)(r1)
+ PPC_LL r20, HOST_NV_GPR(r20)(r1)
+ PPC_LL r21, HOST_NV_GPR(r21)(r1)
+ PPC_LL r22, HOST_NV_GPR(r22)(r1)
+ PPC_LL r23, HOST_NV_GPR(r23)(r1)
+ PPC_LL r24, HOST_NV_GPR(r24)(r1)
+ PPC_LL r25, HOST_NV_GPR(r25)(r1)
+ PPC_LL r26, HOST_NV_GPR(r26)(r1)
+ PPC_LL r27, HOST_NV_GPR(r27)(r1)
+ PPC_LL r28, HOST_NV_GPR(r28)(r1)
+ PPC_LL r29, HOST_NV_GPR(r29)(r1)
+ PPC_LL r30, HOST_NV_GPR(r30)(r1)
+ PPC_LL r31, HOST_NV_GPR(r31)(r1)
+
+ /* Return to kvm_vcpu_run(). */
+ mtlr r5
+ addi r1, r1, HOST_STACK_SIZE
+ /* r3 still contains the return code from kvmppc_handle_exit(). */
+ blr
+
+/* Registers:
+ * r3: kvm_run pointer
+ * r4: vcpu pointer
+ */
+_GLOBAL(__kvmppc_vcpu_run)
+ stwu r1, -HOST_STACK_SIZE(r1)
+ PPC_STL r1, VCPU_HOST_STACK(r4) /* Save stack pointer to vcpu. */
+
+ /* Save host state to stack. */
+ PPC_STL r3, HOST_RUN(r1)
+ mflr r3
+ PPC_STL r3, HOST_STACK_LR(r1)
+
+ /* Save host non-volatile register state to stack. */
+ PPC_STL r14, HOST_NV_GPR(r14)(r1)
+ PPC_STL r15, HOST_NV_GPR(r15)(r1)
+ PPC_STL r16, HOST_NV_GPR(r16)(r1)
+ PPC_STL r17, HOST_NV_GPR(r17)(r1)
+ PPC_STL r18, HOST_NV_GPR(r18)(r1)
+ PPC_STL r19, HOST_NV_GPR(r19)(r1)
+ PPC_STL r20, HOST_NV_GPR(r20)(r1)
+ PPC_STL r21, HOST_NV_GPR(r21)(r1)
+ PPC_STL r22, HOST_NV_GPR(r22)(r1)
+ PPC_STL r23, HOST_NV_GPR(r23)(r1)
+ PPC_STL r24, HOST_NV_GPR(r24)(r1)
+ PPC_STL r25, HOST_NV_GPR(r25)(r1)
+ PPC_STL r26, HOST_NV_GPR(r26)(r1)
+ PPC_STL r27, HOST_NV_GPR(r27)(r1)
+ PPC_STL r28, HOST_NV_GPR(r28)(r1)
+ PPC_STL r29, HOST_NV_GPR(r29)(r1)
+ PPC_STL r30, HOST_NV_GPR(r30)(r1)
+ PPC_STL r31, HOST_NV_GPR(r31)(r1)
+
+ /* Load guest non-volatiles. */
+ PPC_LL r14, VCPU_GPR(r14)(r4)
+ PPC_LL r15, VCPU_GPR(r15)(r4)
+ PPC_LL r16, VCPU_GPR(r16)(r4)
+ PPC_LL r17, VCPU_GPR(r17)(r4)
+ PPC_LL r18, VCPU_GPR(r18)(r4)
+ PPC_LL r19, VCPU_GPR(r19)(r4)
+ PPC_LL r20, VCPU_GPR(r20)(r4)
+ PPC_LL r21, VCPU_GPR(r21)(r4)
+ PPC_LL r22, VCPU_GPR(r22)(r4)
+ PPC_LL r23, VCPU_GPR(r23)(r4)
+ PPC_LL r24, VCPU_GPR(r24)(r4)
+ PPC_LL r25, VCPU_GPR(r25)(r4)
+ PPC_LL r26, VCPU_GPR(r26)(r4)
+ PPC_LL r27, VCPU_GPR(r27)(r4)
+ PPC_LL r28, VCPU_GPR(r28)(r4)
+ PPC_LL r29, VCPU_GPR(r29)(r4)
+ PPC_LL r30, VCPU_GPR(r30)(r4)
+ PPC_LL r31, VCPU_GPR(r31)(r4)
+
+
+lightweight_exit:
+ PPC_STL r2, HOST_R2(r1)
+
+ mfspr r3, SPRN_PID
+ stw r3, VCPU_HOST_PID(r4)
+ lwz r3, VCPU_GUEST_PID(r4)
+ mtspr SPRN_PID, r3
+
+ /* Save vcpu pointer for the exception handlers
+ * must be done before loading guest r2.
+ */
+// SET_VCPU(r4)
+
+ PPC_LL r11, VCPU_SHARED(r4)
+ /* Save host mas4 and mas6 and load guest MAS registers */
+ mfspr r3, SPRN_MAS4
+ stw r3, VCPU_HOST_MAS4(r4)
+ mfspr r3, SPRN_MAS6
+ stw r3, VCPU_HOST_MAS6(r4)
+ lwz r3, VCPU_SHARED_MAS0(r11)
+ lwz r5, VCPU_SHARED_MAS1(r11)
+#ifndef CONFIG_64BIT
+ lwz r6, (VCPU_SHARED_MAS2 + 4)(r11)
+#else
+ ld r6, (VCPU_SHARED_MAS2)(r11)
+#endif
+ lwz r7, VCPU_SHARED_MAS7_3+4(r11)
+ lwz r8, VCPU_SHARED_MAS4(r11)
+ mtspr SPRN_MAS0, r3
+ mtspr SPRN_MAS1, r5
+ mtspr SPRN_MAS2, r6
+ mtspr SPRN_MAS3, r7
+ mtspr SPRN_MAS4, r8
+ lwz r3, VCPU_SHARED_MAS6(r11)
+ lwz r5, VCPU_SHARED_MAS7_3+0(r11)
+ mtspr SPRN_MAS6, r3
+ mtspr SPRN_MAS7, r5
+ /* Disable MAS register updates via exception */
+ mfspr r3, SPRN_EPCR
+ oris r3, r3, SPRN_EPCR_DMIUH@h
+ mtspr SPRN_EPCR, r3
+
+ /*
+ * Host interrupt handlers may have clobbered these guest-readable
+ * SPRGs, so we need to reload them here with the guest's values.
+ */
+ lwz r3, VCPU_VRSAVE(r4)
+ lwz r5, VCPU_SHARED_SPRG4(r11)
+ mtspr SPRN_VRSAVE, r3
+ lwz r6, VCPU_SHARED_SPRG5(r11)
+ mtspr SPRN_SPRG4W, r5
+ lwz r7, VCPU_SHARED_SPRG6(r11)
+ mtspr SPRN_SPRG5W, r6
+ lwz r8, VCPU_SHARED_SPRG7(r11)
+ mtspr SPRN_SPRG6W, r7
+ mtspr SPRN_SPRG7W, r8
+
+ /* Load some guest volatiles. */
+ PPC_LL r3, VCPU_LR(r4)
+ PPC_LL r5, VCPU_XER(r4)
+ PPC_LL r6, VCPU_CTR(r4)
+ PPC_LL r7, VCPU_CR(r4)
+ PPC_LL r8, VCPU_PC(r4)
+#ifndef CONFIG_64BIT
+ lwz r9, (VCPU_SHARED_MSR + 4)(r11)
+#else
+ ld r9, (VCPU_SHARED_MSR)(r11)
+#endif
+ PPC_LL r0, VCPU_GPR(r0)(r4)
+ PPC_LL r1, VCPU_GPR(r1)(r4)
+ PPC_LL r2, VCPU_GPR(r2)(r4)
+ PPC_LL r10, VCPU_GPR(r10)(r4)
+ PPC_LL r11, VCPU_GPR(r11)(r4)
+ PPC_LL r12, VCPU_GPR(r12)(r4)
+ PPC_LL r13, VCPU_GPR(r13)(r4)
+ mtlr r3
+ mtxer r5
+ mtctr r6
+ mtcr r7
+ mtsrr0 r8
+ mtsrr1 r9
+
+#ifdef CONFIG_KVM_EXIT_TIMING
+ /* save enter time */
+1:
+ mfspr r6, SPRN_TBRU
+ mfspr r7, SPRN_TBRL
+ mfspr r8, SPRN_TBRU
+ cmpw r8, r6
+ PPC_STL r7, VCPU_TIMING_LAST_ENTER_TBL(r4)
+ bne 1b
+ PPC_STL r8, VCPU_TIMING_LAST_ENTER_TBU(r4)
+#endif
+
+ /* Finish loading guest volatiles and jump to guest. */
+ PPC_LL r5, VCPU_GPR(r5)(r4)
+ PPC_LL r6, VCPU_GPR(r6)(r4)
+ PPC_LL r7, VCPU_GPR(r7)(r4)
+ PPC_LL r8, VCPU_GPR(r8)(r4)
+ PPC_LL r9, VCPU_GPR(r9)(r4)
+
+ PPC_LL r3, VCPU_GPR(r3)(r4)
+ PPC_LL r4, VCPU_GPR(r4)(r4)
+ rfi
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index cd53e08..6a530e4 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -114,6 +114,11 @@
goto out;
#endif
+#ifdef CONFIG_KVM_BOOKE_HV
+ if (!cpu_has_feature(CPU_FTR_EMB_HV))
+ goto out;
+#endif
+
r = true;
out:
diff --git a/arch/powerpc/kvm/timing.h b/arch/powerpc/kvm/timing.h
index 8167d42..bf191e7 100644
--- a/arch/powerpc/kvm/timing.h
+++ b/arch/powerpc/kvm/timing.h
@@ -93,6 +93,12 @@
case SIGNAL_EXITS:
vcpu->stat.signal_exits++;
break;
+ case DBELL_EXITS:
+ vcpu->stat.dbell_exits++;
+ break;
+ case GDBELL_EXITS:
+ vcpu->stat.gdbell_exits++;
+ break;
}
}