Commit 98defd2e authored by Like Xu's avatar Like Xu Committed by Paolo Bonzini
Browse files

KVM: x86/pmu: Ignore pmu->global_ctrl check if vPMU doesn't support global_ctrl 



MSR_CORE_PERF_GLOBAL_CTRL is introduced as part of Architecture PMU V2,
as indicated by Intel SDM 19.2.2 and the intel_is_valid_msr() function.

So in the absence of global_ctrl support, all PMCs are enabled as AMD does.

Signed-off-by: default avatarLike Xu <likexu@tencent.com>
Message-Id: <20220509102204.62389-1-likexu@tencent.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent c49467a4

arch/x86/kvm/vmx/pmu_intel.c

+3 −0
Original line number Diff line number Diff line
@@ -98,6 +98,9 @@ static bool intel_pmc_is_enabled(struct kvm_pmc *pmc) 
{

	struct kvm_pmu *pmu = pmc_to_pmu(pmc);



	if (pmu->version < 2)

		return true;



	return test_bit(pmc->idx, (unsigned long *)&pmu->global_ctrl);

}