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Sat, 16 Nov 2024 00:06:41 +0000 Message-ID: Date: Fri, 15 Nov 2024 16:06:38 -0800 User-Agent: Mozilla Thunderbird From: Reinette Chatre Subject: Re: [PATCH v9 09/26] x86/resctrl: Introduce interface to display number of monitoring counters To: Babu Moger , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , References: <447a268e3cddcebc30a0b2c5ccb321e3c6b9c8d9.1730244116.git.babu.moger@amd.com> Content-Language: en-US In-Reply-To: <447a268e3cddcebc30a0b2c5ccb321e3c6b9c8d9.1730244116.git.babu.moger@amd.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0063.namprd03.prod.outlook.com (2603:10b6:303:b6::8) 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_|IA1PR11MB7944:EE_ X-MS-Office365-Filtering-Correlation-Id: 4c77fdc3-1ff5-4fd4-94e1-08dd05d28c66 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|7416014|376014|366016|1800799024; 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Number of assignments depend on number of > monitoring counters available. > > Provide the interface to display the number of monitoring counters > supported. The interface file 'num_mbm_cntrs' is available when an > architecture supports mbm_cntr_assign mode. > As mentioned in previous patch, do you think it may be possible to have a value for num_mbm_cntrs for non-ABMC AMD systems? If that is available and always exposed to user space (irrespective of mbm_cntr_assign mode) then it would be clear to user space on benefits/risks of running a "default" mode. Reinette