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hyperv: make SynIC version msr constant 

The value of HV_X64_MSR_SVERSION is initialized once at vcpu init, and
is reset to zero on vcpu reset, which is wrong.

It is supposed to be a constant, so drop the field from X86CPU, set the
msr with the constant value, and don't bother getting it.

Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20171122181418.14180-4-rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Roman Kagan 2017-11-22 21:14:18 +03:00 committed by Paolo Bonzini
parent 689141dde2
commit 09df29b665
2 changed files with 2 additions and 8 deletions
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1
target/i386/cpu.h
View File

@ -1107,7 +1107,6 @@ typedef struct CPUX86State {
uint64_t msr_hv_crash_params[HV_CRASH_PARAMS];
uint64_t msr_hv_runtime;
uint64_t msr_hv_synic_control;
uint64_t msr_hv_synic_version;
uint64_t msr_hv_synic_evt_page;
uint64_t msr_hv_synic_msg_page;
uint64_t msr_hv_synic_sint[HV_SINT_COUNT];

9
target/i386/kvm.c
View File

@ -669,7 +669,6 @@ static int hyperv_handle_properties(CPUState *cs)
}
env->features[FEAT_HYPERV_EAX] |= HV_SYNIC_AVAILABLE;
env->msr_hv_synic_version = HV_SYNIC_VERSION;
}
if (cpu->hyperv_stimer) {
if (!has_msr_hv_stimer) {
@ -1715,10 +1714,10 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
if (cpu->hyperv_synic) {
int j;
kvm_msr_entry_add(cpu, HV_X64_MSR_SVERSION, HV_SYNIC_VERSION);
kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL,
env->msr_hv_synic_control);
kvm_msr_entry_add(cpu, HV_X64_MSR_SVERSION,
env->msr_hv_synic_version);
kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP,
env->msr_hv_synic_evt_page);
kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP,
@ -2082,7 +2081,6 @@ static int kvm_get_msrs(X86CPU *cpu)
uint32_t msr;
kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL, 0);
kvm_msr_entry_add(cpu, HV_X64_MSR_SVERSION, 0);
kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP, 0);
kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP, 0);
for (msr = HV_X64_MSR_SINT0; msr <= HV_X64_MSR_SINT15; msr++) {
@ -2286,9 +2284,6 @@ static int kvm_get_msrs(X86CPU *cpu)
case HV_X64_MSR_SCONTROL:
env->msr_hv_synic_control = msrs[i].data;
break;
case HV_X64_MSR_SVERSION:
env->msr_hv_synic_version = msrs[i].data;
break;
case HV_X64_MSR_SIEFP:
env->msr_hv_synic_evt_page = msrs[i].data;
break;