Commit 9ba0bb4a authored by Sean Christopherson's avatar Sean Christopherson
Browse files

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: default avatarDapeng Mi <dapeng1.mi@linux.intel.com>
Co-developed-by: default avatarMingwei Zhang <mizhang@google.com>
Signed-off-by: default avatarMingwei Zhang <mizhang@google.com>
[sean: extract to separate patch, write changelog]
Reviewed-by: default avatarSandipan Das <sandipan.das@amd.com>
Tested-by: default avatarXudong Hao <xudong.hao@intel.com>
Tested-by: default avatarManali Shukla <manali.shukla@amd.com>
Link: https://patch.msgid.link/20251206001720.468579-19-seanjc@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent bfee4f07

arch/x86/kvm/svm/pmu.c

+8 −0
Original line number Diff line number Diff line
@@ -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,