Merge branch 'upstream/pvhvm' into upstream/xen
* upstream/pvhvm:
Introduce CONFIG_XEN_PVHVM compile option
blkfront: do not create a PV cdrom device if xen_hvm_guest
support multiple .discard.* sections to avoid section type conflicts
xen/pvhvm: fix build problem when !CONFIG_XEN
xenfs: enable for HVM domains too
x86: Call HVMOP_pagetable_dying on exit_mmap.
x86: Unplug emulated disks and nics.
x86: Use xen_vcpuop_clockevent, xen_clocksource and xen wallclock.
xen: Fix find_unbound_irq in presence of ioapic irqs.
xen: Add suspend/resume support for PV on HVM guests.
xen: Xen PCI platform device driver.
x86/xen: event channels delivery on HVM.
x86: early PV on HVM features initialization.
xen: Add support for HVM hypercalls.
Conflicts:
arch/x86/xen/enlighten.c
arch/x86/xen/time.c
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index b83e119..68128a1 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -13,6 +13,11 @@
kernel to boot in a paravirtualized environment under the
Xen hypervisor.
+config XEN_PVHVM
+ def_bool y
+ depends on XEN
+ depends on X86_LOCAL_APIC
+
config XEN_MAX_DOMAIN_MEMORY
int "Maximum allowed size of a domain in gigabytes"
default 8 if X86_32
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index 3bb4fc2..9309546 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -12,7 +12,7 @@
obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
time.o xen-asm.o xen-asm_$(BITS).o \
- grant-table.o suspend.o
+ grant-table.o suspend.o platform-pci-unplug.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 3c4da8b..d4ff5e8 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -11,6 +11,7 @@
* Jeremy Fitzhardinge <jeremy@xensource.com>, XenSource Inc, 2007
*/
+#include <linux/cpu.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/smp.h>
@@ -35,8 +36,10 @@
#include <xen/interface/version.h>
#include <xen/interface/physdev.h>
#include <xen/interface/vcpu.h>
+#include <xen/interface/memory.h>
#include <xen/features.h>
#include <xen/page.h>
+#include <xen/hvm.h>
#include <xen/hvc-console.h>
#include <asm/paravirt.h>
@@ -55,7 +58,9 @@
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/reboot.h>
+#include <asm/setup.h>
#include <asm/stackprotector.h>
+#include <asm/hypervisor.h>
#include "xen-ops.h"
#include "mmu.h"
@@ -76,6 +81,10 @@
void *xen_initial_gdt;
+RESERVE_BRK(shared_info_page_brk, PAGE_SIZE);
+__read_mostly int xen_have_vector_callback;
+EXPORT_SYMBOL_GPL(xen_have_vector_callback);
+
/*
* Point at some empty memory to start with. We map the real shared_info
* page as soon as fixmap is up and running.
@@ -938,10 +947,6 @@
.patch = xen_patch,
};
-static const struct pv_time_ops xen_time_ops __initdata = {
- .sched_clock = xen_clocksource_read,
-};
-
static const struct pv_cpu_ops xen_cpu_ops __initdata = {
.cpuid = xen_cpuid,
@@ -1096,7 +1101,6 @@
/* Install Xen paravirt ops */
pv_info = xen_info;
pv_init_ops = xen_init_ops;
- pv_time_ops = xen_time_ops;
pv_cpu_ops = xen_cpu_ops;
pv_apic_ops = xen_apic_ops;
@@ -1104,13 +1108,7 @@
x86_init.oem.arch_setup = xen_arch_setup;
x86_init.oem.banner = xen_banner;
- x86_init.timers.timer_init = xen_time_init;
- x86_init.timers.setup_percpu_clockev = x86_init_noop;
- x86_cpuinit.setup_percpu_clockev = x86_init_noop;
-
- x86_platform.calibrate_tsc = xen_tsc_khz;
- x86_platform.get_wallclock = xen_get_wallclock;
- x86_platform.set_wallclock = xen_set_wallclock;
+ xen_init_time_ops();
/*
* Set up some pagetable state before starting to set any ptes.
@@ -1235,3 +1233,139 @@
x86_64_start_reservations((char *)__pa_symbol(&boot_params));
#endif
}
+
+static uint32_t xen_cpuid_base(void)
+{
+ uint32_t base, eax, ebx, ecx, edx;
+ char signature[13];
+
+ for (base = 0x40000000; base < 0x40010000; base += 0x100) {
+ cpuid(base, &eax, &ebx, &ecx, &edx);
+ *(uint32_t *)(signature + 0) = ebx;
+ *(uint32_t *)(signature + 4) = ecx;
+ *(uint32_t *)(signature + 8) = edx;
+ signature[12] = 0;
+
+ if (!strcmp("XenVMMXenVMM", signature) && ((eax - base) >= 2))
+ return base;
+ }
+
+ return 0;
+}
+
+static int init_hvm_pv_info(int *major, int *minor)
+{
+ uint32_t eax, ebx, ecx, edx, pages, msr, base;
+ u64 pfn;
+
+ base = xen_cpuid_base();
+ cpuid(base + 1, &eax, &ebx, &ecx, &edx);
+
+ *major = eax >> 16;
+ *minor = eax & 0xffff;
+ printk(KERN_INFO "Xen version %d.%d.\n", *major, *minor);
+
+ cpuid(base + 2, &pages, &msr, &ecx, &edx);
+
+ pfn = __pa(hypercall_page);
+ wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
+
+ xen_setup_features();
+
+ pv_info = xen_info;
+ pv_info.kernel_rpl = 0;
+
+ xen_domain_type = XEN_HVM_DOMAIN;
+
+ return 0;
+}
+
+void xen_hvm_init_shared_info(void)
+{
+ int cpu;
+ struct xen_add_to_physmap xatp;
+ static struct shared_info *shared_info_page = 0;
+
+ if (!shared_info_page)
+ shared_info_page = (struct shared_info *)
+ extend_brk(PAGE_SIZE, PAGE_SIZE);
+ xatp.domid = DOMID_SELF;
+ xatp.idx = 0;
+ xatp.space = XENMAPSPACE_shared_info;
+ xatp.gpfn = __pa(shared_info_page) >> PAGE_SHIFT;
+ if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp))
+ BUG();
+
+ HYPERVISOR_shared_info = (struct shared_info *)shared_info_page;
+
+ /* xen_vcpu is a pointer to the vcpu_info struct in the shared_info
+ * page, we use it in the event channel upcall and in some pvclock
+ * related functions. We don't need the vcpu_info placement
+ * optimizations because we don't use any pv_mmu or pv_irq op on
+ * HVM.
+ * When xen_hvm_init_shared_info is run at boot time only vcpu 0 is
+ * online but xen_hvm_init_shared_info is run at resume time too and
+ * in that case multiple vcpus might be online. */
+ for_each_online_cpu(cpu) {
+ per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
+ }
+}
+
+#ifdef CONFIG_XEN_PVHVM
+static int __cpuinit xen_hvm_cpu_notify(struct notifier_block *self,
+ unsigned long action, void *hcpu)
+{
+ int cpu = (long)hcpu;
+ switch (action) {
+ case CPU_UP_PREPARE:
+ per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block __cpuinitdata xen_hvm_cpu_notifier = {
+ .notifier_call = xen_hvm_cpu_notify,
+};
+
+static void __init xen_hvm_guest_init(void)
+{
+ int r;
+ int major, minor;
+
+ r = init_hvm_pv_info(&major, &minor);
+ if (r < 0)
+ return;
+
+ xen_hvm_init_shared_info();
+
+ if (xen_feature(XENFEAT_hvm_callback_vector))
+ xen_have_vector_callback = 1;
+ register_cpu_notifier(&xen_hvm_cpu_notifier);
+ xen_unplug_emulated_devices();
+ have_vcpu_info_placement = 0;
+ x86_init.irqs.intr_init = xen_init_IRQ;
+ xen_hvm_init_time_ops();
+ xen_hvm_init_mmu_ops();
+}
+
+static bool __init xen_hvm_platform(void)
+{
+ if (xen_pv_domain())
+ return false;
+
+ if (!xen_cpuid_base())
+ return false;
+
+ return true;
+}
+
+const __refconst struct hypervisor_x86 x86_hyper_xen_hvm = {
+ .name = "Xen HVM",
+ .detect = xen_hvm_platform,
+ .init_platform = xen_hvm_guest_init,
+};
+EXPORT_SYMBOL(x86_hyper_xen_hvm);
+#endif
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 914f046..413b19b 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -58,6 +58,7 @@
#include <xen/page.h>
#include <xen/interface/xen.h>
+#include <xen/interface/hvm/hvm_op.h>
#include <xen/interface/version.h>
#include <xen/hvc-console.h>
@@ -1941,6 +1942,40 @@
pv_mmu_ops = xen_mmu_ops;
}
+#ifdef CONFIG_XEN_PVHVM
+static void xen_hvm_exit_mmap(struct mm_struct *mm)
+{
+ struct xen_hvm_pagetable_dying a;
+ int rc;
+
+ a.domid = DOMID_SELF;
+ a.gpa = __pa(mm->pgd);
+ rc = HYPERVISOR_hvm_op(HVMOP_pagetable_dying, &a);
+ WARN_ON_ONCE(rc < 0);
+}
+
+static int is_pagetable_dying_supported(void)
+{
+ struct xen_hvm_pagetable_dying a;
+ int rc = 0;
+
+ a.domid = DOMID_SELF;
+ a.gpa = 0x00;
+ rc = HYPERVISOR_hvm_op(HVMOP_pagetable_dying, &a);
+ if (rc < 0) {
+ printk(KERN_DEBUG "HVMOP_pagetable_dying not supported\n");
+ return 0;
+ }
+ return 1;
+}
+
+void __init xen_hvm_init_mmu_ops(void)
+{
+ if (is_pagetable_dying_supported())
+ pv_mmu_ops.exit_mmap = xen_hvm_exit_mmap;
+}
+#endif
+
#ifdef CONFIG_XEN_DEBUG_FS
static struct dentry *d_mmu_debug;
diff --git a/arch/x86/xen/mmu.h b/arch/x86/xen/mmu.h
index 5fe6bc7..fa938c4 100644
--- a/arch/x86/xen/mmu.h
+++ b/arch/x86/xen/mmu.h
@@ -60,4 +60,5 @@
unsigned long xen_read_cr2_direct(void);
extern void xen_init_mmu_ops(void);
+extern void xen_hvm_init_mmu_ops(void);
#endif /* _XEN_MMU_H */
diff --git a/arch/x86/xen/platform-pci-unplug.c b/arch/x86/xen/platform-pci-unplug.c
new file mode 100644
index 0000000..554c002
--- /dev/null
+++ b/arch/x86/xen/platform-pci-unplug.c
@@ -0,0 +1,137 @@
+/******************************************************************************
+ * platform-pci-unplug.c
+ *
+ * Xen platform PCI device driver
+ * Copyright (c) 2010, Citrix
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+
+#include <xen/platform_pci.h>
+
+#define XEN_PLATFORM_ERR_MAGIC -1
+#define XEN_PLATFORM_ERR_PROTOCOL -2
+#define XEN_PLATFORM_ERR_BLACKLIST -3
+
+/* store the value of xen_emul_unplug after the unplug is done */
+int xen_platform_pci_unplug;
+EXPORT_SYMBOL_GPL(xen_platform_pci_unplug);
+#ifdef CONFIG_XEN_PVHVM
+static int xen_emul_unplug;
+
+static int __init check_platform_magic(void)
+{
+ short magic;
+ char protocol;
+
+ magic = inw(XEN_IOPORT_MAGIC);
+ if (magic != XEN_IOPORT_MAGIC_VAL) {
+ printk(KERN_ERR "Xen Platform PCI: unrecognised magic value\n");
+ return XEN_PLATFORM_ERR_MAGIC;
+ }
+
+ protocol = inb(XEN_IOPORT_PROTOVER);
+
+ printk(KERN_DEBUG "Xen Platform PCI: I/O protocol version %d\n",
+ protocol);
+
+ switch (protocol) {
+ case 1:
+ outw(XEN_IOPORT_LINUX_PRODNUM, XEN_IOPORT_PRODNUM);
+ outl(XEN_IOPORT_LINUX_DRVVER, XEN_IOPORT_DRVVER);
+ if (inw(XEN_IOPORT_MAGIC) != XEN_IOPORT_MAGIC_VAL) {
+ printk(KERN_ERR "Xen Platform: blacklisted by host\n");
+ return XEN_PLATFORM_ERR_BLACKLIST;
+ }
+ break;
+ default:
+ printk(KERN_WARNING "Xen Platform PCI: unknown I/O protocol version");
+ return XEN_PLATFORM_ERR_PROTOCOL;
+ }
+
+ return 0;
+}
+
+void __init xen_unplug_emulated_devices(void)
+{
+ int r;
+
+ /* check the version of the xen platform PCI device */
+ r = check_platform_magic();
+ /* If the version matches enable the Xen platform PCI driver.
+ * Also enable the Xen platform PCI driver if the version is really old
+ * and the user told us to ignore it. */
+ if (r && !(r == XEN_PLATFORM_ERR_MAGIC &&
+ (xen_emul_unplug & XEN_UNPLUG_IGNORE)))
+ return;
+ /* Set the default value of xen_emul_unplug depending on whether or
+ * not the Xen PV frontends and the Xen platform PCI driver have
+ * been compiled for this kernel (modules or built-in are both OK). */
+ if (!xen_emul_unplug) {
+ if (xen_must_unplug_nics()) {
+ printk(KERN_INFO "Netfront and the Xen platform PCI driver have "
+ "been compiled for this kernel: unplug emulated NICs.\n");
+ xen_emul_unplug |= XEN_UNPLUG_ALL_NICS;
+ }
+ if (xen_must_unplug_disks()) {
+ printk(KERN_INFO "Blkfront and the Xen platform PCI driver have "
+ "been compiled for this kernel: unplug emulated disks.\n"
+ "You might have to change the root device\n"
+ "from /dev/hd[a-d] to /dev/xvd[a-d]\n"
+ "in your root= kernel command line option\n");
+ xen_emul_unplug |= XEN_UNPLUG_ALL_IDE_DISKS;
+ }
+ }
+ /* Now unplug the emulated devices */
+ if (!(xen_emul_unplug & XEN_UNPLUG_IGNORE))
+ outw(xen_emul_unplug, XEN_IOPORT_UNPLUG);
+ xen_platform_pci_unplug = xen_emul_unplug;
+}
+
+static int __init parse_xen_emul_unplug(char *arg)
+{
+ char *p, *q;
+ int l;
+
+ for (p = arg; p; p = q) {
+ q = strchr(p, ',');
+ if (q) {
+ l = q - p;
+ q++;
+ } else {
+ l = strlen(p);
+ }
+ if (!strncmp(p, "all", l))
+ xen_emul_unplug |= XEN_UNPLUG_ALL;
+ else if (!strncmp(p, "ide-disks", l))
+ xen_emul_unplug |= XEN_UNPLUG_ALL_IDE_DISKS;
+ else if (!strncmp(p, "aux-ide-disks", l))
+ xen_emul_unplug |= XEN_UNPLUG_AUX_IDE_DISKS;
+ else if (!strncmp(p, "nics", l))
+ xen_emul_unplug |= XEN_UNPLUG_ALL_NICS;
+ else if (!strncmp(p, "ignore", l))
+ xen_emul_unplug |= XEN_UNPLUG_IGNORE;
+ else
+ printk(KERN_WARNING "unrecognised option '%s' "
+ "in parameter 'xen_emul_unplug'\n", p);
+ }
+ return 0;
+}
+early_param("xen_emul_unplug", parse_xen_emul_unplug);
+#endif
diff --git a/arch/x86/xen/suspend.c b/arch/x86/xen/suspend.c
index a9c6611..1d789d5 100644
--- a/arch/x86/xen/suspend.c
+++ b/arch/x86/xen/suspend.c
@@ -26,6 +26,18 @@
BUG();
}
+void xen_hvm_post_suspend(int suspend_cancelled)
+{
+ int cpu;
+ xen_hvm_init_shared_info();
+ xen_callback_vector();
+ if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
+ for_each_online_cpu(cpu) {
+ xen_setup_runstate_info(cpu);
+ }
+ }
+}
+
void xen_post_suspend(int suspend_cancelled)
{
xen_build_mfn_list_list();
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index a86df42..1a5353a 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -20,6 +20,7 @@
#include <asm/xen/hypercall.h>
#include <xen/events.h>
+#include <xen/features.h>
#include <xen/interface/xen.h>
#include <xen/interface/vcpu.h>
@@ -156,7 +157,7 @@
}
/* Get the TSC speed from Xen */
-unsigned long xen_tsc_khz(void)
+static unsigned long xen_tsc_khz(void)
{
struct pvclock_vcpu_time_info *info =
&HYPERVISOR_shared_info->vcpu_info[0].time;
@@ -191,7 +192,7 @@
put_cpu_var(xen_vcpu);
}
-unsigned long xen_get_wallclock(void)
+static unsigned long xen_get_wallclock(void)
{
struct timespec ts;
@@ -199,7 +200,7 @@
return ts.tv_sec;
}
-int xen_set_wallclock(unsigned long now)
+static int xen_set_wallclock(unsigned long now)
{
/* do nothing for domU */
return -1;
@@ -434,7 +435,11 @@
}
}
-__init void xen_time_init(void)
+static const struct pv_time_ops xen_time_ops __initdata = {
+ .sched_clock = xen_clocksource_read,
+};
+
+static __init void xen_time_init(void)
{
int cpu = smp_processor_id();
struct timespec tp;
@@ -458,3 +463,47 @@
xen_setup_timer(cpu);
xen_setup_cpu_clockevents();
}
+
+__init void xen_init_time_ops(void)
+{
+ pv_time_ops = xen_time_ops;
+
+ x86_init.timers.timer_init = xen_time_init;
+ x86_init.timers.setup_percpu_clockev = x86_init_noop;
+ x86_cpuinit.setup_percpu_clockev = x86_init_noop;
+
+ x86_platform.calibrate_tsc = xen_tsc_khz;
+ x86_platform.get_wallclock = xen_get_wallclock;
+ x86_platform.set_wallclock = xen_set_wallclock;
+}
+
+#ifdef CONFIG_XEN_PVHVM
+static void xen_hvm_setup_cpu_clockevents(void)
+{
+ int cpu = smp_processor_id();
+ xen_setup_runstate_info(cpu);
+ xen_setup_timer(cpu);
+ xen_setup_cpu_clockevents();
+}
+
+__init void xen_hvm_init_time_ops(void)
+{
+ /* vector callback is needed otherwise we cannot receive interrupts
+ * on cpu > 0 */
+ if (!xen_have_vector_callback && num_present_cpus() > 1)
+ return;
+ if (!xen_feature(XENFEAT_hvm_safe_pvclock)) {
+ printk(KERN_INFO "Xen doesn't support pvclock on HVM,"
+ "disable pv timer\n");
+ return;
+ }
+
+ pv_time_ops = xen_time_ops;
+ x86_init.timers.setup_percpu_clockev = xen_time_init;
+ x86_cpuinit.setup_percpu_clockev = xen_hvm_setup_cpu_clockevents;
+
+ x86_platform.calibrate_tsc = xen_tsc_khz;
+ x86_platform.get_wallclock = xen_get_wallclock;
+ x86_platform.set_wallclock = xen_set_wallclock;
+}
+#endif
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 00d59d6..7c8ab86 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -38,6 +38,10 @@
void xen_enable_syscall(void);
void xen_vcpu_restore(void);
+void xen_callback_vector(void);
+void xen_hvm_init_shared_info(void);
+void __init xen_unplug_emulated_devices(void);
+
void __init xen_build_dynamic_phys_to_machine(void);
void xen_init_irq_ops(void);
@@ -46,11 +50,8 @@
void xen_teardown_timer(int cpu);
cycle_t xen_clocksource_read(void);
void xen_setup_cpu_clockevents(void);
-unsigned long xen_tsc_khz(void);
-void __init xen_time_init(void);
-unsigned long xen_get_wallclock(void);
-int xen_set_wallclock(unsigned long time);
-unsigned long long xen_sched_clock(void);
+void __init xen_init_time_ops(void);
+void __init xen_hvm_init_time_ops(void);
irqreturn_t xen_debug_interrupt(int irq, void *dev_id);