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Shenoy" To: "Rafael J . Wysocki" , Len Brown , Mario Limonciello , Yunhui Cui , Jeremy Linton , "Viresh Kumar" , Ionela Voinescu CC: , , "Christopher Harris" , , "Gautham R. Shenoy" , "Mario Limonciello (AMD) (kernel.org)" Subject: [PATCH v2 4/5] ACPI: CPPC: Limit perf ctrs in PCC check only to online CPUs Date: Fri, 7 Nov 2025 13:11:44 +0530 Message-ID: <20251107074145.2340-5-gautham.shenoy@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251107074145.2340-1-gautham.shenoy@amd.com> References: <20251107074145.2340-1-gautham.shenoy@amd.com> Precedence: bulk X-Mailing-List: linux-acpi@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: SN1PEPF000397B5:EE_|SA1PR12MB8117:EE_ X-MS-Office365-Filtering-Correlation-Id: b9ee6040-c044-4993-9216-08de1dd1638d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|376014|82310400026|7416014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?qsocN9SY3B1c3yI29yWmnCIpdwn7dessXEW0Vw5GEK//H61TCo+JjUirnVBD?= =?us-ascii?Q?2Q4zP4h+DgwXrjZTrEVPRT4aojjfPOwQ4FDDeTTDDJD2b+KiLnk1TxRjq29l?= =?us-ascii?Q?mbguCeYjiHqW4TImPjDm5OJB9b6hizECl0ztzzC1c0CRTlDZf1mVFLiLzwDq?= =?us-ascii?Q?Got/4TRN11aY7MofxHIKbmsNdxiDY7MvRak9gySEwjjXOarntjJTmwwwGr5/?= =?us-ascii?Q?MbhQv5QXgAojouX1eHehaz0utuHg8O1gFFH1yB+ekaeTMDqvHQ5sYbgwvfnd?= =?us-ascii?Q?m3TPKzCxjqEPLav4rZohXBg6eyk+wSG+Uq48qdXhL3S+GKYJWbWXruZvd9ez?= =?us-ascii?Q?SCNU8PT1wtCdHnCmmChN8JR0wuyEezmuiFu7obrbjunzzHh7tOf01VGznEWA?= =?us-ascii?Q?3eQ3WzgwNeo3kxJJ+m+T4clMt0XXCOtAToibIAJ4D7qVj9C2iz1GIFRsojAn?= =?us-ascii?Q?Wo4MdbZSTYzRAN7hpU+vIi98Qu1gva4OmCZGuNeUUeHGhbKg7N8aBGz88s1K?= =?us-ascii?Q?v+TBFa/hJZlQfpHpvSniSnpTzxFmW7IcLECNFCLmmSLqlE/grcifT4Py1ghf?= =?us-ascii?Q?2hOz2k+hEMzGtXb69E4qheLkKIOSkOadnT0CVXcpj+/EMOlOrDdkGh6l2Q7a?= =?us-ascii?Q?ci3dg8P/skvYjQzKZv5XBFih0N5JwjqyTL83dElblTx79yJ+rM0P3z9CrDDA?= =?us-ascii?Q?V3yj0OBD2nbV4Njb9BqTA1HxQzTdZ/5RAkWJVmEKyy6X+evbgPIYik2MWKnF?= =?us-ascii?Q?0iCOaX4p1hEfEN9bfGn0PfvvZPPyXN9t/S1Mt1PAyxPjsTlxf8ktJS9DydO5?= =?us-ascii?Q?Q3ORWZCTkdqrnOFbCFQMQ29dm4AnSi7Rm5Ney9+doONW29aD0wuAdnFY8Iz+?= =?us-ascii?Q?YV3UUoaDEmGVXAXDHj7SarvmrgSKCUi9tRiFoL5NmIV3ENzjvhF+41eg8jMx?= =?us-ascii?Q?pdigH9HqQ4RwreKBuh+1wocNpWI0HafshpiB1T7nN3+ndAahEBu5mnKf9rC2?= =?us-ascii?Q?cySBIjsv8SRUf7SJJXCO5akIKgO4FOaEWEBnPn2ifMxT4hP2jwboO8VMpgTt?= =?us-ascii?Q?PVFkAR/Tp8zMAvQ/WRQn6BcAVT7vTb6FuNnh+/xTT3YlaWAdtMnkyPPcsj2Q?= =?us-ascii?Q?njmbYhpovQFVgOHGTVcipjwOWXOzgxXNhz/+5drUZrJZLlMCtcUlpIA/3q2d?= =?us-ascii?Q?tWEbjzVy0iKBNMn7boTFCLai3Li8zoF9pYspk3Cby9AAB4Pnux1WU9tvcs4N?= =?us-ascii?Q?XfPrYPPjFQQxmyg0uW4QSbTphBejfqw7076WzXdGqszcSkNee9WGxTx8ieCc?= =?us-ascii?Q?Zhooy/p7rnOKlYQgz05sZDPz0kdGW6B4oqVpSM7Gm/QdOdoquNp256+vOnWR?= =?us-ascii?Q?oRmA6x0fQRDf+rMiIfdt3G2GYVl5eGFigwOMmJ8U0vps+m8Vt0DjSHLE0PaX?= =?us-ascii?Q?btuBvu7S4ZsoSgHMlbsMJxl3WJcu/Jx4LfBQNi3xMI4jw5wncAiZJ5RXgE8m?= =?us-ascii?Q?bzj6ozsy2vKT61kKRv0bUx30fp0lE9K4GH+YhXFPxaVOVE1ZEJhJv93CaNp0?= =?us-ascii?Q?TxsgPGjytX0BMab7Vrc=3D?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700013)(1800799024)(376014)(82310400026)(7416014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Nov 2025 07:43:48.8118 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b9ee6040-c044-4993-9216-08de1dd1638d 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: SN1PEPF000397B5.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB8117 per_cpu(cpc_desc_ptr, cpu) object is initialized for only the online CPU via acpi_soft_cpu_online() --> __acpi_processor_start() --> acpi_cppc_processor_probe(). However the function cppc_perf_ctrs_in_pcc() checks if the CPPC perf-ctrs are in a PCC region for all the present CPUs, which breaks when the kernel is booted with "nosmt=force". Hence, limit the check only to the online CPUs. Fixes: ae2df912d1a5 ("ACPI: CPPC: Disable FIE if registers in PCC regions") Reviewed-by: "Mario Limonciello (AMD) (kernel.org)" Signed-off-by: Gautham R. Shenoy --- drivers/acpi/cppc_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index fb7696b27d82..f49c72d3a78b 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -1435,7 +1435,7 @@ bool cppc_perf_ctrs_in_pcc(void) { int cpu; - for_each_present_cpu(cpu) { + for_each_online_cpu(cpu) { struct cpc_register_resource *ref_perf_reg; struct cpc_desc *cpc_desc; -- 2.34.1