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Peter Anvin" , Petr Tesarik , Dapeng Mi , Zide Chen , Ravi Bangoria , Ananth Narayan , Sandipan Das Subject: [PATCH v2 0/3] perf/x86: Fix perf_event_print_debug() on non-Intel PMUs Date: Fri, 14 Aug 2026 23:18:05 +0530 Message-ID: X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF000015CB:EE_|IA4PR12MB9787:EE_ X-MS-Office365-Filtering-Correlation-Id: 3e775739-70ad-4866-48e6-08defa2c59ea X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|23010399003|7416014|376014|82310400026|1800799024|13003099007|6133799003|10067099003|11063799006|56012099006|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700016)(23010399003)(7416014)(376014)(82310400026)(1800799024)(13003099007)(6133799003)(10067099003)(11063799006)(56012099006)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 3aiZTWku2CjsFwDkHVv2rlcRnGtzpUrDTBLfZtCeM7Za8FV9fbMh0/j37xtpyBJOCA/OrGLxRAa0jPyb4wSoJHBVAvNTzXRmsAiUyEI0m4DXFN0YjfbGt0Ti8YGeDyKZO2LeB7dstSobcVi9bYp7PDS0BD7NoG95YGYJ9mk1S5isanYlZHqsWpAnh7BC2NdxS7dcSRYnpCAU65HuzK5HRAEmBiRrHxrgcKaWURqzbgsS8yzyjGpVL/8KkwexFbrwa9LjkI7Y4D3jOTXh491BJizWsqBYjNuDdLOBqAen4Qwjnj5NXZu59ifOOsAwi/yCbFCzoz4i+vEGK/67Ur1iuSnlLI//FMpI1dZl6TFn6mw576zZgXKE2WSHuq/Kb/ljQg2txfW33i+OUqxrX59Xawf4QIuULT91oKM1PUklt8P3KQEYz4zkfBpiHpjS9Nc0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Aug 2026 17:49:12.6600 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3e775739-70ad-4866-48e6-08defa2c59ea 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: SA2PEPF000015CB.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA4PR12MB9787 Petr Tesarik reported that reading MSR_ARCH_PERFMON_FIXED_CTR_CTRL raises a #GP on AMD processors that support PerfMonV2, and proposed skipping that register when no fixed counters are implemented [1]. However, perf_event_print_debug() also dumps the global control and status registers whenever x86_pmu.version >= 2, and reads Intel Architectural PerfMon MSRs to do so. That condition used to be Intel-specific, but since commit 21d59e3e2c40 ("perf/x86/amd/core: Detect PerfMonV2 support"), x86_pmu.version is also set to 2 on AMD processors that support PerfMonV2, where none of those registers are available. The same reasoning therefore applies to the other registers read here, so rather than special-casing each one or reinstating a vendor check, this series makes the global register dump a vendor-specific operation. [1] https://lore.kernel.org/all/20260717150315.2868314-1-ptesarik@suse.com/ Previous versions can be found at v1: https://lore.kernel.org/all/cover.1786010408.git.sandipan.das@amd.com/ Changes in v2: * Address build issue reported by Sashiko. * Use a static_call as suggested by Dapeng. * Pick up Tested-by from Petr. Sandipan Das (3): perf/x86: Add x86_pmu::print_debug perf/x86: Move MSR_CORE_PERF_GLOBAL_* dump to vendor code perf/x86/amd: Implement x86_pmu::print_debug arch/x86/events/amd/core.c | 20 ++++++++++++ arch/x86/events/core.c | 60 ++++++++++++++++------------------ arch/x86/events/intel/core.c | 32 ++++++++++++++++++ arch/x86/events/perf_event.h | 4 +++ arch/x86/events/zhaoxin/core.c | 18 ++++++++++ 5 files changed, 102 insertions(+), 32 deletions(-) -- 2.53.0