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kvm: get/set PV EOI MSR

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Support get/set of new PV EOI MSR, for migration.
Add an optional section for MSR value - send it
out in case MSR was changed from the default value (0).

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Michael S. Tsirkin 2012-08-28 20:43:56 +03:00 committed by Anthony Liguori
parent 651682dcf5
commit bc9a839d56
3 changed files with 35 additions and 0 deletions
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1
target-i386/cpu.h
View File

@ -699,6 +699,7 @@ typedef struct CPUX86State {
uint64_t system_time_msr;
uint64_t wall_clock_msr;
uint64_t async_pf_en_msr;
uint64_t pv_eoi_en_msr;
uint64_t tsc;
uint64_t tsc_deadline;

13
target-i386/kvm.c
View File

@ -63,6 +63,7 @@ static bool has_msr_star;
static bool has_msr_hsave_pa;
static bool has_msr_tsc_deadline;
static bool has_msr_async_pf_en;
static bool has_msr_pv_eoi_en;
static bool has_msr_misc_enable;
static int lm_capable_kernel;
@ -455,6 +456,8 @@ int kvm_arch_init_vcpu(CPUX86State *env)
has_msr_async_pf_en = c->eax & (1 << KVM_FEATURE_ASYNC_PF);
has_msr_pv_eoi_en = c->eax & (1 << KVM_FEATURE_PV_EOI);
cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused);
for (i = 0; i <= limit; i++) {
@ -1017,6 +1020,10 @@ static int kvm_put_msrs(CPUX86State *env, int level)
kvm_msr_entry_set(&msrs[n++], MSR_KVM_ASYNC_PF_EN,
env->async_pf_en_msr);
}
if (has_msr_pv_eoi_en) {
kvm_msr_entry_set(&msrs[n++], MSR_KVM_PV_EOI_EN,
env->pv_eoi_en_msr);
}
if (hyperv_hypercall_available()) {
kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_GUEST_OS_ID, 0);
kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_HYPERCALL, 0);
@ -1259,6 +1266,9 @@ static int kvm_get_msrs(CPUX86State *env)
if (has_msr_async_pf_en) {
msrs[n++].index = MSR_KVM_ASYNC_PF_EN;
}
if (has_msr_pv_eoi_en) {
msrs[n++].index = MSR_KVM_PV_EOI_EN;
}
if (env->mcg_cap) {
msrs[n++].index = MSR_MCG_STATUS;
@ -1338,6 +1348,9 @@ static int kvm_get_msrs(CPUX86State *env)
case MSR_KVM_ASYNC_PF_EN:
env->async_pf_en_msr = msrs[i].data;
break;
case MSR_KVM_PV_EOI_EN:
env->pv_eoi_en_msr = msrs[i].data;
break;
}
}

21
target-i386/machine.c
View File

@ -279,6 +279,13 @@ static bool async_pf_msr_needed(void *opaque)
return cpu->async_pf_en_msr != 0;
}
static bool pv_eoi_msr_needed(void *opaque)
{
CPUX86State *cpu = opaque;
return cpu->pv_eoi_en_msr != 0;
}
static const VMStateDescription vmstate_async_pf_msr = {
.name = "cpu/async_pf_msr",
.version_id = 1,
@ -290,6 +297,17 @@ static const VMStateDescription vmstate_async_pf_msr = {
}
};
static const VMStateDescription vmstate_pv_eoi_msr = {
.name = "cpu/async_pv_eoi_msr",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_UINT64(pv_eoi_en_msr, CPUX86State),
VMSTATE_END_OF_LIST()
}
};
static bool fpop_ip_dp_needed(void *opaque)
{
CPUX86State *env = opaque;
@ -453,6 +471,9 @@ static const VMStateDescription vmstate_cpu = {
{
.vmsd = &vmstate_async_pf_msr,
.needed = async_pf_msr_needed,
} , {
.vmsd = &vmstate_pv_eoi_msr,
.needed = pv_eoi_msr_needed,
} , {
.vmsd = &vmstate_fpop_ip_dp,
.needed = fpop_ip_dp_needed,