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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 V6 7/7] Documentation: introduce amd-pstate preferrd core mode kernel command line options Date: Fri, 8 Sep 2023 15:46:53 +0800 Message-ID: <20230908074653.2799055-8-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230908074653.2799055-1-li.meng@amd.com> References: <20230908074653.2799055-1-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_|PH0PR12MB5435:EE_ X-MS-Office365-Filtering-Correlation-Id: e04172fd-a9ab-4435-c1e4-08dbb03ff1fa 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)(376002)(39860400002)(346002)(136003)(396003)(1800799009)(451199024)(186009)(82310400011)(40470700004)(46966006)(36840700001)(40460700003)(47076005)(36756003)(82740400003)(83380400001)(81166007)(356005)(2906002)(36860700001)(40480700001)(110136005)(54906003)(70586007)(70206006)(6636002)(316002)(6666004)(7696005)(86362001)(478600001)(2616005)(1076003)(16526019)(26005)(426003)(336012)(8936002)(4326008)(8676002)(5660300002)(41300700001)(36900700001)(14943795004); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Sep 2023 07:48:09.0821 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e04172fd-a9ab-4435-c1e4-08dbb03ff1fa 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: PH0PR12MB5435 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-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: ,