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Wed, 28 May 2025 17:34:07 +0000 Message-ID: <14ca1527-ee25-448d-949b-ed8df546c916@intel.com> Date: Wed, 28 May 2025 10:34:04 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v13 08/27] x86/resctrl: Introduce mbm_cntr_cfg to track assignable counters at domain To: "Moger, Babu" , Babu Moger , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , References: <79efa13654a6f1a308622bd13e0d2bc21ffb4367.1747349530.git.babu.moger@amd.com> <5636898e-78dc-4eb1-b226-ced62372e09a@intel.com> <40ff2cd0-c8b9-460b-b98a-087cb251324e@amd.com> From: Reinette Chatre Content-Language: en-US In-Reply-To: <40ff2cd0-c8b9-460b-b98a-087cb251324e@amd.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SJ2PR07CA0019.namprd07.prod.outlook.com (2603:10b6:a03:505::21) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR11MB7573:EE_|DM4PR11MB6525:EE_ X-MS-Office365-Filtering-Correlation-Id: 17edfb79-bd3b-4f87-4c6a-08dd9e0dd90d 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|376014|1800799024|7416014; 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>>>   }; >>>   +/** >>> + * struct mbm_cntr_cfg - Assignable counter configuration >>> + * @evtid:        MBM event to which the counter is assigned. Only valid >>> + *            if @rdtgroup is not NULL. >>> + * @evt_cfg:        Event configuration value. >> >> @evt_cfg is not introduced in changelog nor defined here. Please add a snippet here >> on what @evt_cfg's values represent. This is important since this is exposed >> as resctrl fs API to architectures so all architectures need to use same values when >> interacting with resctrl. > > Sure. > > @evt_cfg: A value that represents memory transactions (e.g., reads, writes, etc.). This still does not explain how an @evt_cfg value should be interpreted. For example, it could be something like below (please feel free to improve). @evt_cfg: Event configuration created using the READS_TO_LOCAL_MEM, READS_TO_REMOTE_MEM, etc. bits that represent the memory transactions being counted. Reinette