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Peter Anvin" , Petr Tesarik , Ravi Bangoria , Ananth Narayan , Sandipan Das Subject: [PATCH 0/3] perf/x86: Fix perf_event_print_debug() on non-Intel PMUs Date: Thu, 6 Aug 2026 15:33:25 +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 satlexmb10.amd.com (10.181.42.219) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PEPF0000000C:EE_|CYYPR12MB9016:EE_ X-MS-Office365-Filtering-Correlation-Id: c9c16e7f-d59d-4d73-153a-08def3a3c24b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|36860700016|82310400026|1800799024|23010399003|11063799006|10067099003|56012099006|6133799003|13003099007|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)(7416014)(376014)(36860700016)(82310400026)(1800799024)(23010399003)(11063799006)(10067099003)(56012099006)(6133799003)(13003099007)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: kJTgBp530835ckySS4v+GFLPE/q2BmY7OxSZU02qNzvRzciIKveUzNeykagNqAOCR2tN9mR6bqjNkLIpB7hYYhxI4rBZzUBrK3ddfb5ciK9jSyt2anbGFmazU6jxQRzKDmAMUSip6TEwJzGMD1wxFV/dMJrXr1ruNiGKFKQHHUmLKzDHhktIBVIW7wmTy0wrZfTA8Vy/fYBpgjbtCWmkQnPFt7DDku1uU5uewOVy09+gV9IQBTguYKh4z5DcocvM7/fZ55nUhNMfc+aecBGl5YhyMBdv9wZyRj730UrroBNWL/vtQVVq05SVE0WsTIj7aenNxjhEDbB3YaS3ZsJEqivV647AiIu8d3OV5fFpOFFRkbV1y9s2/EnWuONHaCgSG+Oe+gFBKMpyHIrdwVs7jutVpOdZSjcLeeoFd2I3nlCkTAbHKUREfqDj69+O4a6N X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Aug 2026 10:16:19.7698 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c9c16e7f-d59d-4d73-153a-08def3a3c24b 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: CH3PEPF0000000C.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CYYPR12MB9016 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/ 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 | 56 +++++++++++++++------------------- arch/x86/events/intel/core.c | 32 +++++++++++++++++++ arch/x86/events/perf_event.h | 4 +++ arch/x86/events/zhaoxin/core.c | 18 +++++++++++ 5 files changed, 98 insertions(+), 32 deletions(-) -- 2.53.0