diff options
| author | Babu Moger <babu.moger@amd.com> | 2025-09-05 16:34:07 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-09-15 12:08:01 +0200 |
| commit | 13390861b426e936db20d675804a5b405622bc79 (patch) | |
| tree | 580d5eb66541241dfe44fc4f91319e6a469d6883 /include/linux | |
| parent | 5ad68c8f965fed78c61f2ac7aea933f06bb50032 (diff) | |
x86,fs/resctrl: Detect Assignable Bandwidth Monitoring feature details
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 ABMC feature details are documented in APM [1] available from [2].
[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.
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/cover.1757108044.git.babu.moger@amd.com
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537 # [2]
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/resctrl.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index fe2af6cb96d4..eb80cc233be4 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -260,10 +260,14 @@ enum resctrl_schema_fmt { * @num_rmid: Number of RMIDs available. * @mbm_cfg_mask: Memory transactions that can be tracked when bandwidth * monitoring events can be configured. + * @num_mbm_cntrs: Number of assignable counters. + * @mbm_cntr_assignable:Is system capable of supporting counter assignment? */ struct resctrl_mon { int num_rmid; unsigned int mbm_cfg_mask; + int num_mbm_cntrs; + bool mbm_cntr_assignable; }; /** |