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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 , "Oleksandr Natalenko" , Meng Li , Wyes Karny Subject: [PATCH V9 7/7] Documentation: introduce amd-pstate preferrd core mode kernel command line options Date: Fri, 13 Oct 2023 10:57:41 +0800 Message-ID: <20231013025741.3332520-8-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231013025741.3332520-1-li.meng@amd.com> References: <20231013025741.3332520-1-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: CO1PEPF000044F2:EE_|CH2PR12MB4876:EE_ X-MS-Office365-Filtering-Correlation-Id: 2a06fa91-9e31-4d93-0640-08dbcb984bbb 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)(396003)(346002)(136003)(230922051799003)(186009)(1800799009)(64100799003)(82310400011)(451199024)(36840700001)(46966006)(40470700004)(54906003)(41300700001)(316002)(6636002)(7416002)(8936002)(8676002)(4326008)(478600001)(70586007)(70206006)(110136005)(40460700003)(7696005)(82740400003)(81166007)(356005)(86362001)(36860700001)(40480700001)(47076005)(426003)(336012)(83380400001)(26005)(2906002)(16526019)(36756003)(1076003)(5660300002)(6666004)(2616005)(36900700001)(14943795004);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2023 02:58:36.7666 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2a06fa91-9e31-4d93-0640-08dbcb984bbb 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: CO1PEPF000044F2.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4876 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 Reviewed-by: Huang Rui Tested-by: Oleksandr Natalenko --- 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: ,