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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CH2PEPF0000013D.mail.protection.outlook.com (10.167.244.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7519.19 via Frontend Transport; Fri, 26 Apr 2024 06:35:25 +0000 Received: from pyuan-Chachani-VN.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Fri, 26 Apr 2024 01:35:22 -0500 From: Perry Yuan To: , , , , , CC: , , , , , Subject: [PATCH v8 5/6] Documentation: cpufreq: amd-pstate: introduce the new cpu boost control method Date: Fri, 26 Apr 2024 14:34:48 +0800 Message-ID: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: CH2PEPF0000013D:EE_|IA1PR12MB7518:EE_ X-MS-Office365-Filtering-Correlation-Id: f0200f6c-1cf2-42ff-27db-08dc65bb0e8d 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)(82310400014)(376005)(1800799015)(36860700004); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Apr 2024 06:35:25.6564 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f0200f6c-1cf2-42ff-27db-08dc65bb0e8d 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: CH2PEPF0000013D.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB7518 From: Perry Yuan Introduce AMD CPU frequency boosting control sysfs entry which used for switching boost on and boost off. If core performance boost is disabled while a core is in a boosted P-state, the core automatically transitions to the highest performance non-boosted P-state The highest perf and frequency will be limited by the setting value. Signed-off-by: Perry Yuan --- Documentation/admin-guide/pm/amd-pstate.rst | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index 1e0d101b020a..82fbd01da658 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -440,6 +440,17 @@ control its functionality at the system level. They are located in the This attribute is read-only to check the state of preferred core set by the kernel parameter. +``cpb_boost`` + Specifies whether core performance boost is requested to be enabled or disabled + If core performance boost is disabled while a core is in a boosted P-state, the + core automatically transitions to the highest performance non-boosted P-state. + AMD Core Performance Boost(CPB) is controlled by this new attribute file which + allow user to change all cores frequency boosting state. It supports both + ``active``, ``passive`` and ``guided`` mode control with below value write to it. + + "0" Disable Core Performance Boosting + "1" Enable Core Performance Boosting + ``cpupower`` tool support for ``amd-pstate`` ===============================================