Commit 17a024a8 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

KVM: x86: Refresh PMU after writes to MSR_IA32_PERF_CAPABILITIES 



Refresh the PMU if userspace modifies MSR_IA32_PERF_CAPABILITIES.  KVM
consumes the vCPU's PERF_CAPABILITIES when enumerating PEBS support, but
relies on CPUID updates to refresh the PMU.  I.e. KVM will do the wrong
thing if userspace stuffs PERF_CAPABILITIES _after_ setting guest CPUID.

Opportunistically fix a curly-brace indentation.

Fixes: c59a1f10 ("KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS")
Cc: Like Xu <like.xu.linux@gmail.com>
Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Message-Id: <20220727233424.2968356-2-seanjc@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 9d27d461

arch/x86/kvm/x86.c

+2 −2
Original line number Diff line number Diff line
@@ -3546,7 +3546,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) 
			return 1;



		vcpu->arch.perf_capabilities = data;



		kvm_pmu_refresh(vcpu);

		return 0;

	}

	case MSR_EFER: