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kvm: make hyperv hypercall and guest os id MSRs migratable. 

Signed-off-by: Vadim Rozenfeld <vrozenfe@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vadim Rozenfeld 2014-01-24 00:40:47 +11:00 committed by Paolo Bonzini
parent 7bc3d711b4
commit 1c90ef2619
3 changed files with 39 additions and 2 deletions
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2
target-i386/cpu.h
View File

@ -862,6 +862,8 @@ typedef struct CPUX86State {
uint64_t msr_fixed_counters[MAX_FIXED_COUNTERS];
uint64_t msr_gp_counters[MAX_GP_COUNTERS];
uint64_t msr_gp_evtsel[MAX_GP_COUNTERS];
uint64_t msr_hv_hypercall;
uint64_t msr_hv_guest_os_id;
/* exception/interrupt handling */
int error_code;

16
target-i386/kvm.c
View File

@ -1230,8 +1230,10 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
env->msr_global_ctrl);
}
if (has_msr_hv_hypercall) {
kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_GUEST_OS_ID, 0);
kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_HYPERCALL, 0);
kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_GUEST_OS_ID,
env->msr_hv_guest_os_id);
kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_HYPERCALL,
env->msr_hv_hypercall);
}
if (has_msr_hv_vapic) {
kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_APIC_ASSIST_PAGE, 0);
@ -1520,6 +1522,10 @@ static int kvm_get_msrs(X86CPU *cpu)
}
}
if (has_msr_hv_hypercall) {
msrs[n++].index = HV_X64_MSR_HYPERCALL;
msrs[n++].index = HV_X64_MSR_GUEST_OS_ID;
}
msr_data.info.nmsrs = n;
ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, &msr_data);
if (ret < 0) {
@ -1627,6 +1633,12 @@ static int kvm_get_msrs(X86CPU *cpu)
case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL0 + MAX_GP_COUNTERS - 1:
env->msr_gp_evtsel[index - MSR_P6_EVNTSEL0] = msrs[i].data;
break;
case HV_X64_MSR_HYPERCALL:
env->msr_hv_hypercall = msrs[i].data;
break;
case HV_X64_MSR_GUEST_OS_ID:
env->msr_hv_guest_os_id = msrs[i].data;
break;
}
}

23
target-i386/machine.c
View File

@ -554,6 +554,26 @@ static const VMStateDescription vmstate_mpx = {
}
};
static bool hyperv_hypercall_enable_needed(void *opaque)
{
X86CPU *cpu = opaque;
CPUX86State *env = &cpu->env;
return env->msr_hv_hypercall != 0 || env->msr_hv_guest_os_id != 0;
}
static const VMStateDescription vmstate_msr_hypercall_hypercall = {
.name = "cpu/msr_hyperv_hypercall",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_UINT64(env.msr_hv_hypercall, X86CPU),
VMSTATE_UINT64(env.msr_hv_guest_os_id, X86CPU),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_x86_cpu = {
.name = "cpu",
.version_id = 12,
@ -688,6 +708,9 @@ const VMStateDescription vmstate_x86_cpu = {
} , {
.vmsd = &vmstate_mpx,
.needed = mpx_needed,
}, {
.vmsd = &vmstate_msr_hypercall_hypercall,
.needed = hyperv_hypercall_enable_needed,
} , {
/* empty */
}