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KVM: x86: hyper-v: Honor HV_MSR_APIC_ACCESS_AVAILABLE privilege bit

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HV_X64_MSR_EOI, HV_X64_MSR_ICR, HV_X64_MSR_TPR, and
HV_X64_MSR_VP_ASSIST_PAGE  are only available to guest when
HV_MSR_APIC_ACCESS_AVAILABLE bit is exposed.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-14-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2021-05-21 11:51:47 +02:00 committed by Paolo Bonzini
parent eba60ddae7
commit 978b57475c
1 changed files with 7 additions and 0 deletions
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7
arch/x86/kvm/hyperv.c
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@ -1246,6 +1246,13 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr)
case HV_X64_MSR_STIMER3_COUNT:
return hv_vcpu->cpuid_cache.features_eax &
HV_MSR_SYNTIMER_AVAILABLE;
case HV_X64_MSR_EOI:
case HV_X64_MSR_ICR:
case HV_X64_MSR_TPR:
case HV_X64_MSR_VP_ASSIST_PAGE:
return hv_vcpu->cpuid_cache.features_eax &
HV_MSR_APIC_ACCESS_AVAILABLE;
break;
default:
break;
}