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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 V2 7/7] Documentation: introduce AMD Pstate Preferrd Core mode kernel command line options Date: Tue, 15 Aug 2023 14:15:46 +0800 Message-ID: <20230815061546.3556083-8-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230815061546.3556083-1-li.meng@amd.com> References: <20230815061546.3556083-1-li.meng@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000044F6:EE_|SN7PR12MB6791:EE_ X-MS-Office365-Filtering-Correlation-Id: f101cc84-d0a3-46e9-6b01-08db9d574ffb 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:(13230028)(4636009)(346002)(39860400002)(376002)(136003)(396003)(186006)(1800799006)(451199021)(82310400008)(40470700004)(36840700001)(46966006)(83380400001)(36756003)(426003)(336012)(47076005)(36860700001)(86362001)(40480700001)(41300700001)(478600001)(356005)(81166007)(54906003)(70586007)(6636002)(70206006)(316002)(8676002)(110136005)(5660300002)(4326008)(82740400003)(8936002)(40460700003)(2616005)(1076003)(16526019)(26005)(7696005)(6666004)(2906002)(4744005)(36900700001)(14943795004);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Aug 2023 06:17:33.0931 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f101cc84-d0a3-46e9-6b01-08db9d574ffb 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: CO1PEPF000044F6.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6791 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@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 --- 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: ,