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Wysocki" , Huang Rui CC: , , , , Shuah Khan , , "Nathan Fontenot" , Deepak Sharma , Alex Deucher , Mario Limonciello , Shimmer Huang , "Perry Yuan" , Xiaojian Du , Viresh Kumar , Borislav Petkov , Meng Li Subject: [PATCH V3 7/7] Documentation: introduce AMD Pstate Preferrd Core mode kernel command line options Date: Thu, 24 Aug 2023 10:12:49 +0800 Message-ID: <20230824021249.271946-8-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230824021249.271946-1-li.meng@amd.com> References: <20230824021249.271946-1-li.meng@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] 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: CY4PEPF0000EDD3:EE_|MW4PR12MB6975:EE_ X-MS-Office365-Filtering-Correlation-Id: c99c7a61-37c9-4e16-b9df-08dba447df8a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230031)(4636009)(396003)(39860400002)(136003)(346002)(376002)(1800799009)(186009)(451199024)(82310400011)(36840700001)(40470700004)(46966006)(54906003)(70586007)(316002)(70206006)(110136005)(6636002)(8676002)(8936002)(2616005)(4326008)(41300700001)(36756003)(40460700003)(1076003)(356005)(82740400003)(81166007)(478600001)(6666004)(40480700001)(83380400001)(4744005)(2906002)(47076005)(7696005)(36860700001)(86362001)(426003)(336012)(5660300002)(16526019)(26005)(36900700001)(14943795004); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Aug 2023 02:14:40.2007 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c99c7a61-37c9-4e16-b9df-08dba447df8a 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: CY4PEPF0000EDD3.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6975 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org AMD Pstate driver support enable/disable Preferred core. Default enabled on platforms supporting AMD Preferred Core. Disable AMD Pstate Preferred Core with "amd_prefcore=disable" added to the kernel command line. Signed-off-by: Meng Li Reviewed-by: Mario Limonciello Reviewed-by: Wyes Karny --- Documentation/admin-guide/kernel-parameters.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 23ebe34ff901..4f78067bb8af 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -363,6 +363,11 @@ selects a performance level in this range and appropriate to the current workload. + amd_prefcore= + [X86] + disable + Disable AMD Pstate Preferred Core. + amijoy.map= [HW,JOY] Amiga joystick support Map of devices attached to JOY0DAT and JOY1DAT Format: ,