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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 V10 7/7] Documentation: introduce amd-pstate preferrd core mode kernel command line options Date: Mon, 30 Oct 2023 14:34:03 +0800 Message-ID: <20231030063403.3502816-8-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231030063403.3502816-1-li.meng@amd.com> References: <20231030063403.3502816-1-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: BL6PEPF0001AB78:EE_|PH0PR12MB7790:EE_ X-MS-Office365-Filtering-Correlation-Id: d2ffeb8c-0822-4f34-eba1-08dbd912714f 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)(346002)(39860400002)(376002)(396003)(136003)(230922051799003)(82310400011)(451199024)(186009)(64100799003)(1800799009)(36840700001)(40470700004)(46966006)(1076003)(26005)(16526019)(2616005)(336012)(83380400001)(478600001)(6666004)(47076005)(7696005)(36860700001)(426003)(7416002)(5660300002)(2906002)(41300700001)(110136005)(70206006)(70586007)(8936002)(8676002)(6636002)(4326008)(316002)(54906003)(40460700003)(356005)(82740400003)(81166007)(36756003)(86362001)(40480700001)(36900700001)(14943795004); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Oct 2023 06:35:43.6290 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d2ffeb8c-0822-4f34-eba1-08dbd912714f 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: BL6PEPF0001AB78.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB7790 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-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: ,