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Fri, 18 Apr 2025 21:23:09 +0000 Message-ID: <055c901d-4732-4923-a7b5-3936246a4980@intel.com> Date: Fri, 18 Apr 2025 14:23:08 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 04/26] fs/resctrl: Set up Kconfig options for telemetry events To: Tony Luck , Fenghua Yu , "Maciej Wieczor-Retman" , Peter Newman , James Morse , Babu Moger , Drew Fustini , Dave Martin , Anil Keshavamurthy CC: , References: <20250407234032.241215-1-tony.luck@intel.com> <20250407234032.241215-5-tony.luck@intel.com> Content-Language: en-US From: Reinette Chatre In-Reply-To: <20250407234032.241215-5-tony.luck@intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR04CA0275.namprd04.prod.outlook.com (2603:10b6:303:89::10) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR11MB7573:EE_|CO1PR11MB5124:EE_ X-MS-Office365-Filtering-Correlation-Id: 76e07b93-54e4-4a88-aff0-08dd7ebf37da X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024; 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Needs context before jumping in with solution. > > arch/x86 selects this option based on: > > X86_64: Counter registers are in MMIO space. There is no readq() > function on 32-bit. Emulation is possible with readl(), but there > are races. Running 32-bit kernels on systems that support this > feature seems pointless. > > CPU_SUP_INTEL: It is an Intel specific feature. > > Signed-off-by: Tony Luck > --- > arch/x86/Kconfig | 1 + > drivers/platform/x86/intel/pmt/Kconfig | 6 ++++++ > 2 files changed, 7 insertions(+) > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index ea29d22a621f..44a195ee7a42 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -504,6 +504,7 @@ config X86_CPU_RESCTRL > bool "x86 CPU resource control support" > depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD) > depends on MISC_FILESYSTEMS > + select INTEL_AET_RESCTRL if (X86_64 && CPU_SUP_INTEL) > select ARCH_HAS_CPU_RESCTRL > select RESCTRL_FS > select RESCTRL_FS_PSEUDO_LOCK > diff --git a/drivers/platform/x86/intel/pmt/Kconfig b/drivers/platform/x86/intel/pmt/Kconfig > index e916fc966221..b282910b49ef 100644 > --- a/drivers/platform/x86/intel/pmt/Kconfig > +++ b/drivers/platform/x86/intel/pmt/Kconfig > @@ -38,3 +38,9 @@ config INTEL_PMT_CRASHLOG > > To compile this driver as a module, choose M here: the module > will be called intel_pmt_crashlog. > + > +config INTEL_AET_RESCTRL > + bool Usually these settings come with some "depends on" ... no dependencies needed? > + help > + Architecture config should "select" this option to enable > + support for RMID telemtry events in the resctrl file system. telemtry -> telemetry Please define what is meant with "RMID telemetry events" before this statement. Reinette