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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Dec 2025 09:19:45.0846 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d67c9980-5904-4dbe-4d1a-08de3e16957a X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB72.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB8371 On 12/8/2025 9:07 PM, Peter Zijlstra wrote: > On Fri, Dec 05, 2025 at 04:16:36PM -0800, Sean Christopherson wrote: >> My hope/plan is that the perf changes will go through the tip tree with a >> stable tag/branch, and the KVM changes will go the kvm-x86 tree. > >> Kan Liang (7): >> perf: Skip pmu_ctx based on event_type >> perf: Add generic exclude_guest support >> perf: Add APIs to create/release mediated guest vPMUs >> perf: Clean up perf ctx time >> perf: Add a EVENT_GUEST flag >> perf: Add APIs to load/put guest mediated PMU context >> perf/x86/intel: Support PERF_PMU_CAP_MEDIATED_VPMU >> >> Mingwei Zhang (3): >> perf/x86/core: Plumb mediated PMU capability from x86_pmu to >> x86_pmu_cap >> >> Sandipan Das (3): >> perf/x86/core: Do not set bit width for unavailable counters >> perf/x86/amd: Support PERF_PMU_CAP_MEDIATED_VPMU for AMD host >> >> Sean Christopherson (19): >> perf: Move security_perf_event_free() call to __free_event() >> perf/x86/core: Register a new vector for handling mediated guest PMIs >> perf/x86/core: Add APIs to switch to/from mediated PMI vector (for >> KVM) > > That all looks to be in decent shape; lets go get this merged. There is > the nit on patch 4 and I think a number of the exports want to be > EXPORT_SYMBOL_FOR_KVM() instead, but we can do that on top. > > I'll queue these patches after rc1. I have tested this series on AMD EPYC 9745 (Turin, 128-Core Processor) with 12 hours of perf_fuzzer runs across multiple configurations. No new failures were observed. Test Platform: -------------- Hardware: AMD EPYC 9745 128-Core Processor (Turin) Test Duration: 12 hours of perf_fuzzer per configuration Configuration 1: enable_mediated_pmu=Y --------------------------------------- SVM guests: -cpu host -cpu host,-perfmon-v2 -cpu host,-perfctr-core SEV-ES guest: -cpu host SEV-SNP guest: -cpu host Configuration 2: enable_mediated_pmu=N --------------------------------------- SVM guest: -cpu EPYC-Genoa-v2,+pmu -cpu EPYC-Genoa-v2,+pmu,-perfmon-v2 -cpu EPYC-Genoa-v2,+pmu,-perfctr-core SEV-ES guest: -cpu EPYC-Genoa-v2,+pmu SEV-SNP guest: -cpu EPYC-Genoa-v2,+pmu KVM Unit Tests (KUT): --------------------- Tested all combinations of: - enable_mediated_pmu={0,1} - force_emulation_prefix={0,1} CPU configurations tested: -cpu host -cpu host,-perfmon-v2 -cpu host,-perfctr-core All KUT tests passed as expected across all combinations. Tested-by: Manali Shukla -Manali