Commit bfb088d9 authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

KVM: vmx, pmu: accept 0 for host-initiated write to MSR_IA32_DS_AREA 



Whenever an MSR is part of KVM_GET_MSR_INDEX_LIST, as is the case
for MSR_IA32_DS_AREA, it has to be always settable with KVM_SET_MSR.
Accept a zero value for these MSRs to obey the contract.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 98defd2e

arch/x86/kvm/vmx/pmu_intel.c

+2 −0
Original line number Diff line number Diff line
@@ -443,6 +443,8 @@ static int intel_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) 
		}

		break;

	case MSR_IA32_DS_AREA:

		if (msr_info->host_initiated && data && !guest_cpuid_has(vcpu, X86_FEATURE_DS))

			return 1;

		if (is_noncanonical_address(data, vcpu))

			return 1;

		pmu->ds_area = data;