Commit 0a19c899 authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Paolo Bonzini
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KVM: x86: hyper-v: Honor HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE privilege bit 



HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4, HV_X64_MSR_CRASH_CTL are only
available to guest when HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE bit is
exposed.

Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-17-vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 234d01ba

arch/x86/kvm/hyperv.c

+4 −0
Original line number Diff line number Diff line
@@ -1262,6 +1262,10 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr) 
	case HV_X64_MSR_TSC_EMULATION_STATUS:

		return hv_vcpu->cpuid_cache.features_eax &

			HV_ACCESS_REENLIGHTENMENT;

	case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:

	case HV_X64_MSR_CRASH_CTL:

		return hv_vcpu->cpuid_cache.features_edx &

			HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;

	default:

		break;

	}