This is a note to let you know that I've just added the patch titled KVM: x86/pmu: Ignore pmu->global_ctrl check if vPMU doesn't support global_ctrl to the 5.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: kvm-x86-pmu-ignore-pmu-global_ctrl-check-if-vpmu-doe.patch and it can be found in the queue-5.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 6174683901bf4385f235ccf8923ece845be35a32 Author: Like Xu <likexu@xxxxxxxxxxx> Date: Mon May 9 18:22:02 2022 +0800 KVM: x86/pmu: Ignore pmu->global_ctrl check if vPMU doesn't support global_ctrl [ Upstream commit 98defd2e17803263f49548fea930cfc974d505aa ] 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@xxxxxxxxxxx> Message-Id: <20220509102204.62389-1-likexu@xxxxxxxxxxx> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c index cd2d0454f8b0..2cbd5f183ab5 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); }