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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 2/4] ACPI: CPPC: Check _CPC validity for only the online CPUs Date: Wed, 5 Nov 2025 20:08:49 +0530 Message-ID: <20251105143851.4251-3-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: SJ1PEPF00002317:EE_|BN5PR12MB9485:EE_ X-MS-Office365-Filtering-Correlation-Id: b31cea09-54e6-4a48-35ac-08de1c794836 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|82310400026|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?25Kk/VGv5zCW1aZMmgQJFrrgoPydPEmuryLU+uCMu4TXFOXBDpPFTQ5/97Vu?= =?us-ascii?Q?N7pBEtS8ODTH4d0S0xQgN58/30SrplF1C3vqpG2UVGGMNKxbi6XfWTTcHTwz?= =?us-ascii?Q?V9XEvN4UBbvGHmpIItwqru1nBiDN5GKMTuGPwbIgUST1XG4AMjFpTMr1B0fy?= =?us-ascii?Q?lvJbasxwYuF3kBExTpOkEb6HhPCoIlbUAbm8wzslGKij2CA2WeqlXXEwc6wv?= =?us-ascii?Q?J/ZJL4qIZTpxgzGFZtCJWKnwEdjZsxu+mSROVGGeQc7FwFpS4cEyF0XTf8su?= =?us-ascii?Q?rAJaahpfdE4UAfoqCH6n+TzjsUnGwoyePHbmaniv34XaWdoIL18qa+xGvanl?= =?us-ascii?Q?2k1yCs2jutc1TsTjuzGURJWl2zjeUwvJiu6+iOZstvNtOyBUeH3Dkc7okmwN?= =?us-ascii?Q?t/1XVku4YIIVk5tZJn3P/xBz3gSWUbIgjx4/WW8YYXAd/vVvbHNU84xjqwLU?= =?us-ascii?Q?BdUF5wKDQcuYzlkHnQQbQ5AJbpCGwWKizHcII53HvnfPXBh9RdokBPxf6zph?= =?us-ascii?Q?HdUWzwn5UDGFV3tGGTYNvR3yZuOPpfd5hSPY5fpZo2+hJ3A5TS+AC1Nbg1Vj?= =?us-ascii?Q?6sQ8PdptNUAapimaTzz5vtD3d2ZhNQxyPE9EZnD6aaoB4zs8rmIMS1xgWe7A?= =?us-ascii?Q?HjaRXbr7dChlfDkiLZX+vwZ1xdolAkd7RB0W0JP1JbF8bvbSR4IkX4wU4Qel?= =?us-ascii?Q?HQwyxMEe9nG5AtQ0mMnzZKjxxPeVyNGE4HBsSqOOkuiPg+mpK0fVMB3+H3zH?= =?us-ascii?Q?55UTmE/IvMSffXtEq9onCD0+3QNNwUxO7a4LA9tQCZq5ar3DNCTl6Q3u/A9d?= =?us-ascii?Q?XRa9OnRKMYSAjZ39SOnYRYji3MvlUBrGaR7BIA7YKj5vKOdSw0J7IDRjrQqP?= =?us-ascii?Q?jjEq6FzkwuMUA7WldkiMox6YXZcFYP+LQdk3E86Ni4gO3fPWGbIGf59ICmjc?= =?us-ascii?Q?89Yd3jnSKbnKliK6Kc7eoei+LorWwY6RgwrpQQWImdHGp7h7T2yag+Nb0OEM?= =?us-ascii?Q?0bicNJCs3hQtgWbIVwQSxe0+WlN9nliS6niV+GSzjTAPVxzLXXSSA2BOZsWp?= =?us-ascii?Q?qJlLlEHc6KMl81ViFGtq6HmU65fisGSfroBH+DlKns7brhEAAW+jibfzCSAf?= =?us-ascii?Q?P/Zt1aSx9BYwCrGVPKIjFzaS9jVKiiO/JlP4Yqnz8OELtaKde7qfIxNKFg8z?= =?us-ascii?Q?6NxIBZFZkSBh4BhGAUulZvJrn21bV5QWtZjlD68HD53hIQH6CDqv0v7IQ8P8?= =?us-ascii?Q?/SHi4QNvErPcM0dC8T7XU5ELJf+Kd4RuIcbtXudwFUj6a2ECPjY3V2eEvKdp?= =?us-ascii?Q?TH5MCIpGGnLZ8XVdm9jI/ryJ4mAv0//ikcc9RhNCuYJbOk74iB3N1ESN7flf?= =?us-ascii?Q?epIeZhWO8LbGHxyQyhuMIUqrvBEPpmlk22wRqm/QN3nFnFnjADZI8A7JUVuV?= =?us-ascii?Q?ML52iUfjfIArVyjy0yb05KMZqVKOZWzetIjT3Xu5nntmqEGAI4bUlEvuOmIn?= =?us-ascii?Q?CWwz8IEkSPNnASnYnfescNCaW7JR0PtqvylAFKy4N1tTmeaOrp+s01xOAqPW?= =?us-ascii?Q?gadaY/Eb1quz+vpOOfes1bQS5BqEl8QRW3TkkKqw?= 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)(7416014)(376014)(82310400026)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Nov 2025 14:40:35.9961 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b31cea09-54e6-4a48-35ac-08de1c794836 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: SJ1PEPF00002317.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN5PR12MB9485 Content-Type: text/plain; charset="utf-8" per_cpu(cpc_desc_ptr, cpu) object is initialized for only the online CPUs via acpi_soft_cpu_online() --> __acpi_processor_start() --> acpi_cppc_processor_probe(). However the function acpi_cpc_valid() checks for the validity of the _CPC object for all the present CPUs. This breaks when the kernel is booted with "nosmt=3Dforce". Hence check the validity of the _CPC objects of only the online CPUs. Fixes: 2aeca6bd0277 ("ACPI: CPPC: Check present CPUs for determining _CPC i= s valid") Reported-by: Christopher Harris Closes: https://lore.kernel.org/lkml/CAM+eXpdDT7KjLV0AxEwOLkSJ2QtrsvGvjA2cC= Hvt1d0k2_C4Cw@mail.gmail.com/ Suggested-by: Mario Limonciello 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 ab4651205e8a..50e6348b511f 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -460,7 +460,7 @@ bool acpi_cpc_valid(void) if (acpi_disabled) return false; =20 - for_each_present_cpu(cpu) { + for_each_online_cpu(cpu) { cpc_ptr =3D per_cpu(cpc_desc_ptr, cpu); if (!cpc_ptr) return false; --=20 2.34.1