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Add support for async page fault to qemu

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Add save/restore of MSR for migration and cpuid bit.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Gleb Natapov 2010-10-24 14:27:55 +02:00 committed by Anthony Liguori
parent 43849424cf
commit f6584ee203
4 changed files with 42 additions and 1 deletions
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1
target-i386/cpu.h
View file

@ -681,6 +681,7 @@ typedef struct CPUX86State {
#endif
uint64_t system_time_msr;
uint64_t wall_clock_msr;
uint64_t async_pf_en_msr;
uint64_t tsc;

2
target-i386/cpuid.c
View file

@ -73,7 +73,7 @@ static const char *ext3_feature_name[] = {
};
static const char *kvm_feature_name[] = {
"kvmclock", "kvm_nopiodelay", "kvm_mmu", NULL, NULL, NULL, NULL, NULL,
"kvmclock", "kvm_nopiodelay", "kvm_mmu", NULL, "kvm_asyncpf", NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

14
target-i386/kvm.c
View file

@ -161,6 +161,9 @@ struct kvm_para_features {
#endif
#ifdef KVM_CAP_PV_MMU
{ KVM_CAP_PV_MMU, KVM_FEATURE_MMU_OP },
#endif
#ifdef KVM_CAP_ASYNC_PF
{ KVM_CAP_ASYNC_PF, KVM_FEATURE_ASYNC_PF },
#endif
{ -1, -1 }
};
@ -838,6 +841,9 @@ static int kvm_put_msrs(CPUState *env, int level)
kvm_msr_entry_set(&msrs[n++], MSR_KVM_SYSTEM_TIME,
env->system_time_msr);
kvm_msr_entry_set(&msrs[n++], MSR_KVM_WALL_CLOCK, env->wall_clock_msr);
#ifdef KVM_CAP_ASYNC_PF
kvm_msr_entry_set(&msrs[n++], MSR_KVM_ASYNC_PF_EN, env->async_pf_en_msr);
#endif
}
#ifdef KVM_CAP_MCE
if (env->mcg_cap) {
@ -1064,6 +1070,9 @@ static int kvm_get_msrs(CPUState *env)
#endif
msrs[n++].index = MSR_KVM_SYSTEM_TIME;
msrs[n++].index = MSR_KVM_WALL_CLOCK;
#ifdef KVM_CAP_ASYNC_PF
msrs[n++].index = MSR_KVM_ASYNC_PF_EN;
#endif
#ifdef KVM_CAP_MCE
if (env->mcg_cap) {
@ -1135,6 +1144,11 @@ static int kvm_get_msrs(CPUState *env)
}
#endif
break;
#ifdef KVM_CAP_ASYNC_PF
case MSR_KVM_ASYNC_PF_EN:
env->async_pf_en_msr = msrs[i].data;
break;
#endif
}
}

26
target-i386/machine.c
View file

@ -373,6 +373,24 @@ static int cpu_post_load(void *opaque, int version_id)
return 0;
}
static bool async_pf_msr_needed(void *opaque)
{
CPUState *cpu = opaque;
return cpu->async_pf_en_msr != 0;
}
static const VMStateDescription vmstate_async_pf_msr = {
.name = "cpu/async_pf_msr",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_UINT64(async_pf_en_msr, CPUState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_cpu = {
.name = "cpu",
.version_id = CPU_SAVE_VERSION,
@ -475,6 +493,14 @@ static const VMStateDescription vmstate_cpu = {
VMSTATE_YMMH_REGS_VARS(ymmh_regs, CPUState, CPU_NB_REGS, 12),
VMSTATE_END_OF_LIST()
/* The above list is not sorted /wrt version numbers, watch out! */
},
.subsections = (VMStateSubsection []) {
{
.vmsd = &vmstate_async_pf_msr,
.needed = async_pf_msr_needed,
} , {
/* empty */
}
}
};