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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 , Wyes Karny Subject: [PATCH V7 7/7] Documentation: introduce amd-pstate preferrd core mode kernel command line options Date: Mon, 18 Sep 2023 16:14:07 +0800 Message-ID: <20230918081407.756858-8-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230918081407.756858-1-li.meng@amd.com> References: <20230918081407.756858-1-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: SN1PEPF00026369:EE_|PH7PR12MB7018:EE_ X-MS-Office365-Filtering-Correlation-Id: 6bd745aa-53ee-463c-1750-08dbb81f71c4 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)(39860400002)(376002)(346002)(396003)(136003)(451199024)(1800799009)(186009)(82310400011)(36840700001)(46966006)(40470700004)(6666004)(7696005)(40460700003)(86362001)(81166007)(40480700001)(36756003)(82740400003)(356005)(36860700001)(26005)(2616005)(1076003)(47076005)(336012)(2906002)(426003)(16526019)(83380400001)(478600001)(8676002)(5660300002)(4326008)(6636002)(110136005)(8936002)(41300700001)(316002)(54906003)(70206006)(70586007)(36900700001)(14943795004);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Sep 2023 08:15:39.4605 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6bd745aa-53ee-463c-1750-08dbb81f71c4 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: SN1PEPF00026369.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7018 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org amd-pstate driver support enable/disable preferred core. Default enabled on platforms supporting amd-pstate 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 0a1731a0f0ef..e35b795aa8aa 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: ,