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Thu, 17 Jul 2025 18:46:11 +0000 Message-ID: <259c8d15-1af0-49d1-b202-d68ef2a42cee@intel.com> Date: Thu, 17 Jul 2025 11:46:08 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v15 09/34] x86/resctrl: Add support to enable/disable AMD ABMC feature To: Babu Moger , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , References: <1dd845e0cc1d7a771da1afdf65e799e4fde6b5ed.1752013061.git.babu.moger@amd.com> From: Reinette Chatre Content-Language: en-US In-Reply-To: <1dd845e0cc1d7a771da1afdf65e799e4fde6b5ed.1752013061.git.babu.moger@amd.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0311.namprd03.prod.outlook.com (2603:10b6:303:dd::16) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR11MB7573:EE_|IA0PR11MB8354:EE_ X-MS-Office365-Filtering-Correlation-Id: 9543353b-7763-4d0d-d312-08ddc5623339 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|7416014|376014|1800799024|7053199007; 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When the state of ABMC is changed, the MSR needs > to be updated on all the logical processors in the QOS Domain. > > Hardware counters will reset when ABMC state is changed. > > The ABMC feature details are documented in APM listed below [1]. > [1] AMD64 Architecture Programmer's Manual Volume 2: System Programming > Publication # 24593 Revision 3.41 section 19.3.3.3 Assignable Bandwidth > Monitoring (ABMC). > > Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537 > Signed-off-by: Babu Moger > --- Reviewed-by: Reinette Chatre Reinette