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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 V4 7/7] Documentation: introduce AMD Pstate Preferrd Core mode kernel command line options Date: Tue, 29 Aug 2023 14:43:40 +0800 Message-ID: <20230829064340.1136448-8-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230829064340.1136448-1-li.meng@amd.com> References: <20230829064340.1136448-1-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: CO1PEPF000044F2:EE_|MW6PR12MB7072:EE_ X-MS-Office365-Filtering-Correlation-Id: 727fb938-e65d-4dfb-8e67-08dba85b737a 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)(396003)(376002)(39860400002)(346002)(136003)(451199024)(82310400011)(1800799009)(186009)(46966006)(40470700004)(36840700001)(8676002)(8936002)(4326008)(316002)(2906002)(54906003)(6636002)(110136005)(36756003)(70206006)(70586007)(5660300002)(41300700001)(40460700003)(40480700001)(36860700001)(7696005)(16526019)(426003)(26005)(336012)(1076003)(81166007)(82740400003)(356005)(2616005)(478600001)(47076005)(83380400001)(86362001)(6666004)(36900700001)(14943795004);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Aug 2023 06:44:53.4240 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 727fb938-e65d-4dfb-8e67-08dba85b737a 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: MW6PR12MB7072 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 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 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: ,