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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" Subject: [PATCH 4/4] ACPI: CPPC: Limit perf ctrs in PCC check only to online CPUs Date: Wed, 5 Nov 2025 20:08:51 +0530 Message-ID: <20251105143851.4251-5-gautham.shenoy@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251105143851.4251-1-gautham.shenoy@amd.com> References: <20251105143851.4251-1-gautham.shenoy@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: SJ1PEPF00002314:EE_|MW6PR12MB8705:EE_ X-MS-Office365-Filtering-Correlation-Id: 1fe38b13-253f-405a-20ec-08de1c7968d5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|376014|7416014|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?me3jDVoWu/HlV5JRgb0jglcdxd4xjG3ZpIOtVmhwsB8fxq5FJELOvVAbrIG6?= =?us-ascii?Q?RKyXh/yuoZ4cXVtaZ5CXR1PihgwJqYp/Dk+JN70FdXQOABULB/BLaWuwI/54?= =?us-ascii?Q?7N2ifiLHli4aLGs5paksVQgb4xvtxR2TBdcUQVcFbO7FgXE5KE4DecpqUsVw?= =?us-ascii?Q?GP60fqvaWAuIKXEaeCb20tvy9rdzVguGMLWIE4RI1X7Dwnx+LXoqbkrixl4G?= =?us-ascii?Q?8L3+hRwZHYfqnmZ6jhrxMhfb/H4LurOzoSyph/ch+OlhFSlpXg7tmcOorBls?= =?us-ascii?Q?LkMdik+pXu8WawX2xIqXevykrWJZzsq4oToQ+lxMWSpllqiHmyp/VpKh+DL5?= =?us-ascii?Q?RDAqy2Ip/QocMJ0hUzQ+0t466HsmsG1E1yd+wxL2Ql2DRlAjUjXAzjYCr7Sb?= =?us-ascii?Q?iQOkocaUF0sgl7RwqlYwR04Z9l2enNw/JtRGRtlPpP7Gq4uEe+H7wztmWMiR?= =?us-ascii?Q?3p4+8Qkp0n/le4i2SOOk5UEq+TqexuY8+qt17TGKiez6y/ot/Xa6gDIfLy2X?= =?us-ascii?Q?prF6TdJg+7YYqQEbbYubMtlyp/38bzCj6+9liNGJ5UommVN1AaW+yBQhBT21?= =?us-ascii?Q?H7eNtc89utD08bfhXLLCC3khs98YeTnoYa+RN5L7TJmdjW4996FZYjWUgG3P?= =?us-ascii?Q?o8B7Ijqjv4H64ZqsJgCHpb197MSmr0392jsW/Gzhm7l9ZnwbCudVrJegrgO2?= =?us-ascii?Q?WeiE8B9mW3n7L86lDjhubCkFuh92ARUtsBvvxCBSDoZsUgzeKhjesGS/6pGB?= =?us-ascii?Q?30X10iEX98IQAb7+/J2/mtI3UGB2iN8c9z8GV5NNr4Qoty0oiuQu7kAEpzUl?= =?us-ascii?Q?STodvU94bUUVgqyS82ctcsm7oB2KEGmxFpUbf4Wb0ZDMA7qwN+ub502j7sqc?= =?us-ascii?Q?iHbJpaK1elxCrgByreFIZoDF10s9VLepc3MW2JLoovMjZPJwI/Ya1kX/NCdw?= =?us-ascii?Q?tC5buyOQqvyCJAybjZzvlX/0q89GvWg0CRkBofgngMdcciHnk2RP7hh4NkxG?= =?us-ascii?Q?Irw4BmxXyXoKzUEbdbK3+y2vUIC33HiAI35SbNvKcIuQZgW7oC3SPVb4LHxY?= =?us-ascii?Q?lSE37X0GoIV4swww97JAWvTdiqanlr9uuzpFn5KIyvjp5zhVM8tMzBFNDy5m?= =?us-ascii?Q?2BMvB27QCcVCgpDyWFYIg8c961UEKdA+qnZ3P5+3wAkzN9EVvih2XfpsYhsF?= =?us-ascii?Q?qTrQ3XIs3GYXH3cf5v6fqDYAkkdflX4RGmp7qmR4F66SLd0cleBXu7TU00dW?= =?us-ascii?Q?b7SOD83R0EUju0lwQFC8OzZJrfx8pCL9DHZZ6PnNoHLstCPd+mFYzNavcEGb?= =?us-ascii?Q?3kxPBK7NCLFpwK2PHXJUbf6YW4wWVnetqwPdhjCw6AIl/FzE/2fwMnGSqVZ1?= =?us-ascii?Q?ZcEbGVPqgAbAxQOILCRqGF06cqPMfvPiLBr+Fu/j4BMX2kCcc2bis116a42N?= =?us-ascii?Q?JikxhCTOsR3OgoknWfjoWstxLDVOg2LRnfcCAtzW9ILDcOsynOX30SIXdGF3?= =?us-ascii?Q?r4cQfw63rWLxTT+RfvSb4G38sV1y/YMg5cMJAsUFfb3VrNRG3YDOb/PlkJ09?= =?us-ascii?Q?l7XPCoq7XCc/E4w+/rM=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)(1800799024)(82310400026)(376014)(7416014)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Nov 2025 14:41:30.7255 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1fe38b13-253f-405a-20ec-08de1c7968d5 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: SJ1PEPF00002314.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW6PR12MB8705 Content-Type: text/plain; charset="utf-8" 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=3Dforce". Hence, limit the check only to the online CPUs. Fixes: ae2df912d1a5 ("ACPI: CPPC: Disable FIE if registers in PCC regions") 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; =20 - for_each_present_cpu(cpu) { + for_each_online_cpu(cpu) { struct cpc_register_resource *ref_perf_reg; struct cpc_desc *cpc_desc; =20 --=20 2.34.1