From 9ba0bb4ae76a8ee037257499165a4370306c0eac Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Fri, 5 Dec 2025 16:16:54 -0800 Subject: [PATCH] KVM: x86/pmu: Implement AMD mediated PMU requirements Require host PMU version 2+ for AMD mediated PMU support, as PERF_GLOBAL_CTRL and friends are hard requirements for the mediated PMU. Signed-off-by: Dapeng Mi Co-developed-by: Mingwei Zhang Signed-off-by: Mingwei Zhang [sean: extract to separate patch, write changelog] Reviewed-by: Sandipan Das Tested-by: Xudong Hao Tested-by: Manali Shukla Link: https://patch.msgid.link/20251206001720.468579-19-seanjc@google.com Signed-off-by: Sean Christopherson --- arch/x86/kvm/svm/pmu.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/x86/kvm/svm/pmu.c b/arch/x86/kvm/svm/pmu.c index bc062285fbf53..16c88b2a2eb88 100644 --- a/arch/x86/kvm/svm/pmu.c +++ b/arch/x86/kvm/svm/pmu.c @@ -227,6 +227,11 @@ static void amd_pmu_init(struct kvm_vcpu *vcpu) } } +static bool amd_pmu_is_mediated_pmu_supported(struct x86_pmu_capability *host_pmu) +{ + return host_pmu->version >= 2; +} + struct kvm_pmu_ops amd_pmu_ops __initdata = { .rdpmc_ecx_to_pmc = amd_rdpmc_ecx_to_pmc, .msr_idx_to_pmc = amd_msr_idx_to_pmc, @@ -236,6 +241,9 @@ struct kvm_pmu_ops amd_pmu_ops __initdata = { .set_msr = amd_pmu_set_msr, .refresh = amd_pmu_refresh, .init = amd_pmu_init, + + .is_mediated_pmu_supported = amd_pmu_is_mediated_pmu_supported, + .EVENTSEL_EVENT = AMD64_EVENTSEL_EVENT, .MAX_NR_GP_COUNTERS = KVM_MAX_NR_AMD_GP_COUNTERS, .MIN_NR_GP_COUNTERS = AMD64_NUM_COUNTERS, -- 2.47.3