From: Reinette Chatre <reinette.chatre@intel.com>
To: Babu Moger <babu.moger@amd.com>, <corbet@lwn.net>,
<tony.luck@intel.com>, <tglx@linutronix.de>, <mingo@redhat.com>,
<bp@alien8.de>, <dave.hansen@linux.intel.com>
Cc: <Dave.Martin@arm.com>, <james.morse@arm.com>, <x86@kernel.org>,
<hpa@zytor.com>, <akpm@linux-foundation.org>,
<rostedt@goodmis.org>, <paulmck@kernel.org>,
<pawan.kumar.gupta@linux.intel.com>, <kees@kernel.org>,
<arnd@arndb.de>, <fvdl@google.com>, <seanjc@google.com>,
<thomas.lendacky@amd.com>, <yosry.ahmed@linux.dev>,
<xin@zytor.com>, <sohil.mehta@intel.com>, <kai.huang@intel.com>,
<xiaoyao.li@intel.com>, <peterz@infradead.org>,
<mario.limonciello@amd.com>, <xin3.li@intel.com>,
<perry.yuan@amd.com>, <chang.seok.bae@intel.com>,
<linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<peternewman@google.com>, <eranian@google.com>,
<gautham.shenoy@amd.com>
Subject: Re: [PATCH v17 08/33] x86,fs/resctrl: Detect Assignable Bandwidth Monitoring feature details
Date: Tue, 2 Sep 2025 19:29:41 -0700 [thread overview]
Message-ID: <862bd865-ac75-4e4b-8445-fe3987ce7f20@intel.com> (raw)
In-Reply-To: <57c33dd8ed98603d5b434b3f8f32c3c1b19dac00.1755224735.git.babu.moger@amd.com>
Hi Babu,
On 8/14/25 7:25 PM, Babu Moger wrote:
> ABMC feature details are reported via CPUID Fn8000_0020_EBX_x5.
> Bits Description
> 15:0 MAX_ABMC Maximum Supported Assignable Bandwidth
> Monitoring Counter ID + 1
>
> The 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).
>
> Detect the feature and number of assignable counters supported. For
> backward compatibility, upon detecting the assignable counter feature,
> enable the mbm_total_bytes and mbm_local_bytes events that users are
> familiar with as part of original L3 MBM support.
>
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537
> Signed-off-by: Babu Moger <babu.moger@amd.com>
> ---
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Reinette
next prev parent reply other threads:[~2025-09-03 2:29 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-15 2:25 [PATCH v17 00/33] x86,fs/resctrl: Support AMD Assignable Bandwidth Monitoring Counters (ABMC) Babu Moger
2025-08-15 2:25 ` [PATCH v17 01/33] x86,fs/resctrl: Consolidate monitor event descriptions Babu Moger
2025-08-15 2:25 ` [PATCH v17 02/33] x86,fs/resctrl: Replace architecture event enabled checks Babu Moger
2025-08-15 2:25 ` [PATCH v17 03/33] x86/resctrl: Remove 'rdt_mon_features' global variable Babu Moger
2025-08-15 2:25 ` [PATCH v17 04/33] x86,fs/resctrl: Prepare for more monitor events Babu Moger
2025-08-15 2:25 ` [PATCH v17 05/33] x86/cpufeatures: Add support for Assignable Bandwidth Monitoring Counters (ABMC) Babu Moger
2025-08-15 2:25 ` [PATCH v17 06/33] x86/resctrl: Add ABMC feature in the command line options Babu Moger
2025-08-15 2:25 ` [PATCH v17 07/33] x86,fs/resctrl: Consolidate monitoring related data from rdt_resource Babu Moger
2025-08-15 2:25 ` [PATCH v17 08/33] x86,fs/resctrl: Detect Assignable Bandwidth Monitoring feature details Babu Moger
2025-09-03 2:29 ` Reinette Chatre [this message]
2025-08-15 2:25 ` [PATCH v17 09/33] x86/resctrl: Add support to enable/disable AMD ABMC feature Babu Moger
2025-08-15 2:25 ` [PATCH v17 10/33] fs/resctrl: Introduce the interface to display monitoring modes Babu Moger
2025-09-03 2:30 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 11/33] fs/resctrl: Add resctrl file to display number of assignable counters Babu Moger
2025-09-03 2:30 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 12/33] fs/resctrl: Introduce mbm_cntr_cfg to track assignable counters per domain Babu Moger
2025-08-15 2:25 ` [PATCH v17 13/33] fs/resctrl: Introduce interface to display number of free MBM counters Babu Moger
2025-09-03 2:31 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 14/33] x86/resctrl: Add data structures and definitions for ABMC assignment Babu Moger
2025-08-15 2:25 ` [PATCH v17 15/33] fs/resctrl: Introduce event configuration field in struct mon_evt Babu Moger
2025-09-03 2:32 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 16/33] x86,fs/resctrl: Implement resctrl_arch_config_cntr() to assign a counter with ABMC Babu Moger
2025-08-15 2:25 ` [PATCH v17 17/33] fs/resctrl: Add the functionality to assign MBM events Babu Moger
2025-09-03 2:32 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 18/33] fs/resctrl: Add the functionality to unassign " Babu Moger
2025-09-03 2:33 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 19/33] fs/resctrl: Pass struct rdtgroup instead of individual members Babu Moger
2025-08-15 2:25 ` [PATCH v17 20/33] fs/resctrl: Introduce counter ID read, reset calls in mbm_event mode Babu Moger
2025-09-03 2:33 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 21/33] x86/resctrl: Refactor resctrl_arch_rmid_read() Babu Moger
2025-08-15 2:25 ` [PATCH v17 22/33] x86/resctrl: Implement resctrl_arch_reset_cntr() and resctrl_arch_cntr_read() Babu Moger
2025-09-03 2:34 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 23/33] fs/resctrl: Support counter read/reset with mbm_event assignment mode Babu Moger
2025-09-03 2:34 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 24/33] fs/resctrl: Add event configuration directory under info/L3_MON/ Babu Moger
2025-09-03 2:35 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 25/33] fs/resctrl: Provide interface to update the event configurations Babu Moger
2025-09-03 2:41 ` Reinette Chatre
2025-09-03 17:38 ` Moger, Babu
2025-09-03 17:55 ` Reinette Chatre
2025-09-03 18:32 ` Moger, Babu
2025-09-03 20:52 ` Reinette Chatre
2025-09-03 22:03 ` Moger, Babu
2025-08-15 2:25 ` [PATCH v17 26/33] fs/resctrl: Introduce mbm_assign_on_mkdir to enable assignments on mkdir Babu Moger
2025-09-03 2:44 ` Reinette Chatre
2025-09-03 18:53 ` Moger, Babu
2025-08-15 2:25 ` [PATCH v17 27/33] fs/resctrl: Auto assign counters on mkdir and clean up on group removal Babu Moger
2025-09-03 2:45 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 28/33] fs/resctrl: Introduce mbm_L3_assignments to list assignments in a group Babu Moger
2025-09-03 2:59 ` Reinette Chatre
2025-09-03 19:16 ` Moger, Babu
2025-08-15 2:25 ` [PATCH v17 29/33] fs/resctrl: Introduce the interface to modify " Babu Moger
2025-09-03 3:00 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 30/33] fs/resctrl: Disable BMEC event configuration when mbm_event mode is enabled Babu Moger
2025-09-03 3:01 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 31/33] fs/resctrl: Introduce the interface to switch between monitor modes Babu Moger
2025-09-03 3:11 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 32/33] x86/resctrl: Configure mbm_event mode if supported Babu Moger
2025-09-03 3:13 ` Reinette Chatre
2025-08-15 2:25 ` [PATCH v17 33/33] MAINTAINERS: resctrl: add myself as reviewer Babu Moger
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