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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CY4PEPF0000E9D5.mail.protection.outlook.com (10.167.241.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7828.19 via Frontend Transport; Wed, 31 Jul 2024 10:12:26 +0000 Received: from BLRRASHENOY1 (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Wed, 31 Jul 2024 05:12:22 -0500 From: Gautham R.Shenoy To: David Wang <00107082@163.com>, CC: , , , , , , , , , <00107082@163.com> Subject: Re: [Regression] 6.11.0-rc1: AMD CPU boot with error when CPPC feature disabled by BIOS In-Reply-To: <20240730140111.4491-1-00107082@163.com> References: <20240730140111.4491-1-00107082@163.com> Date: Wed, 31 Jul 2024 15:42:12 +0530 Message-ID: <87zfpxsweb.fsf@BLR-5CG11610CF.amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9D5:EE_|SN7PR12MB7420:EE_ X-MS-Office365-Filtering-Correlation-Id: 080b950c-e67d-4ed9-bc5b-08dcb149470d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|376014|82310400026; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Jul 2024 10:12:26.1329 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 080b950c-e67d-4ed9-bc5b-08dcb149470d 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9D5.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB7420 Hello David, David Wang <00107082@163.com> writes: > Hi, > > I notice some kernel warning and errors when I update to 6.11.0-rc1: > > kernel: [ 1.022739] amd_pstate: The CPPC feature is supported but currently disabled by the BIOS. > kernel: [ 1.022739] Please enable it if your BIOS has the CPPC option. > kernel: [ 1.098054] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect > kernel: [ 1.110058] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect > kernel: [ 1.122057] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect > kernel: [ 1.134062] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect > kernel: [ 1.134641] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect > kernel: [ 1.135128] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect > kernel: [ 1.135693] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect > kernel: [ 1.136371] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect > kernel: [ 1.136390] amd_pstate: failed to register with return -19 > kernel: [ 1.138410] ledtrig-cpu: registered to indicate activity on CPUs > > > Those warning message was introduced by commit: > bff7d13c190ad98cf4f877189b022c75df4cb383 ("cpufreq: amd-pstate: add debug message while CPPC is supported and disabled by SBIOS) > , which make sense. If CPPC is disabed in the BIOS, then the _CPC objects shouldn't have been created. And the error message that you should have seen is "the _CPC object is not present in SBIOS or ACPI disabled". Could you please share the family and model number of the platform where you are observing this ? -- Thanks and Regards gautham.