Messages in this thread Patch in this message | | | From | Like Xu <> | Subject | [PATCH 1/3] KVM: x86/pmu: Ignore pmu->global_ctrl check if vPMU doesn't support global_ctrl | Date | Mon, 9 May 2022 18:22:02 +0800 |
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From: Like Xu <likexu@tencent.com>
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: Like Xu <likexu@tencent.com> --- arch/x86/kvm/vmx/pmu_intel.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c index b82b6709d7a8..cff03baf8921 100644 --- a/arch/x86/kvm/vmx/pmu_intel.c +++ b/arch/x86/kvm/vmx/pmu_intel.c @@ -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); } -- 2.36.1
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