Commit 234d01ba authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Paolo Bonzini
Browse files

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



HV_X64_MSR_REENLIGHTENMENT_CONTROL/HV_X64_MSR_TSC_EMULATION_CONTROL/
HV_X64_MSR_TSC_EMULATION_STATUS are only available to guest when
HV_ACCESS_REENLIGHTENMENT bit is exposed.

Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-16-vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 9442f3bd

arch/x86/kvm/hyperv.c

+5 −0
Original line number Diff line number Diff line
@@ -1257,6 +1257,11 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr) 
	case HV_X64_MSR_APIC_FREQUENCY:

		return hv_vcpu->cpuid_cache.features_eax &

			HV_ACCESS_FREQUENCY_MSRS;

	case HV_X64_MSR_REENLIGHTENMENT_CONTROL:

	case HV_X64_MSR_TSC_EMULATION_CONTROL:

	case HV_X64_MSR_TSC_EMULATION_STATUS:

		return hv_vcpu->cpuid_cache.features_eax &

			HV_ACCESS_REENLIGHTENMENT;

	default:

		break;

	}