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client-ip=165.204.84.17; helo=satlexmb08.amd.com; pr=C Received: from satlexmb08.amd.com (165.204.84.17) by CH2PEPF00000145.mail.protection.outlook.com (10.167.244.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.25.13 via Frontend Transport; Thu, 14 May 2026 13:05:07 +0000 Received: from satlexmb10.amd.com (10.181.42.219) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.41; Thu, 14 May 2026 08:05:07 -0500 Received: from satlexmb08.amd.com (10.181.42.217) by satlexmb10.amd.com (10.181.42.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.41; Thu, 14 May 2026 08:05:06 -0500 Received: from [172.31.178.191] (10.180.168.240) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server id 15.2.2562.41 via Frontend Transport; Thu, 14 May 2026 08:05:05 -0500 Message-ID: <3633a2df-73a8-46d0-a430-8f9502cfffd9@amd.com> Date: Thu, 14 May 2026 18:35:04 +0530 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] cpufreq/amd-pstate: Drop Kconfig option for dynamic EPP To: Mario Limonciello CC: Perry Yuan , "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "open list:CPU FREQUENCY SCALING FRAMEWORK" , Stuart Meckle References: <20260512221947.1652988-1-mario.limonciello@amd.com> Content-Language: en-US From: K Prateek Nayak In-Reply-To: <20260512221947.1652988-1-mario.limonciello@amd.com> Content-Type: text/plain; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 5S+9ZSLE1AjZmXz1O39hN3KnGCJ0VqOxIbwhJErQdvasyN1732SBh3JN9G0a1X3IKKzJeALsuOYQjCrdF+yxwWBDPcenNZJ8sqwX6ZjzXzRSGBpteuo+jCkZ1ojP2cbpxJNHw1aM/vKLKjtuk4wHsDY13Vednxf8mn3tmgLFj+10vcWgB3w2clSI5PfP9mOOQCQB5fdW5sFGLOo7UI2VsJpUt4m613dfixbWIfrTJx2nGHIMbdQkq2ffonmdqZvW5DXE3Fiv0FcoSMqPszv7OO2saShUyu4aM+cIGU7Yh1cMmRDOpqbusZCEJzlib6pmTlXZKwKnEWenxbJrL7crEcLaaa2zDx53VbKOrMcuLEhewsQ3+lmmGEy08b5W7tjBDLVOpFVc4g2/DLYmDg9e9bQo1I8pfnQiS2kFgo1JcQh/yNe+W63TN1KfbKZAXbi1 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 May 2026 13:05:07.4059 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c0496571-4865-4c49-e979-08deb1b96c24 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF00000145.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS4PR12MB9794 Hello Mario, On 5/13/2026 3:49 AM, Mario Limonciello wrote: > --- a/Documentation/admin-guide/pm/amd-pstate.rst > +++ b/Documentation/admin-guide/pm/amd-pstate.rst > @@ -358,8 +358,8 @@ Dynamic energy performance profile > The amd-pstate driver supports dynamically selecting the energy performance > profile based on whether the machine is running on AC or DC power. > > -Whether this behavior is enabled by default depends on the kernel > -config option `CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP`. This behavior can also be overridden > +Whether this behavior is enabled by default depends on the kernel command line option > +``amd_dynamic_epp`` is set. This behavior can also be overridden > at runtime by the sysfs file ``/sys/devices/system/cpu/cpufreq/policyX/dynamic_epp``. Unrelated nit. This file should have been /sys/devices/system/cpu/amd_pstate/dynamic_epp right? Apart from that, feel free to add: Reviewed-by: K Prateek Nayak > > When set to enabled, the driver will select a different energy performance -- Thanks and Regards, Prateek