github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-04 12:35:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: x86/pmu: Implement AMD mediated PMU requirements

Browse Source 
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 <dapeng1.mi@linux.intel.com>
Co-developed-by: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
[sean: extract to separate patch, write changelog]
Reviewed-by: Sandipan Das <sandipan.das@amd.com>
Tested-by: Xudong Hao <xudong.hao@intel.com>
Tested-by: Manali Shukla <manali.shukla@amd.com>
Link: https://patch.msgid.link/20251206001720.468579-19-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2025-12-05 16:16:54 -08:00
parent bfee4f07d8
commit 9ba0bb4ae7
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/x86/kvm/svm/pmu.c
View File

@ -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,