diff options
| author | Babu Moger <babu.moger@amd.com> | 2025-09-05 16:34:05 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-09-15 12:05:23 +0200 |
| commit | bebf57bf054b561a62f3440142b2eddab2b0bbff (patch) | |
| tree | b7580296aaf37f95190bff32fd17648ddbf11615 | |
| parent | e19c06219985f2beb9d71959d80f56e318abf744 (diff) | |
x86/resctrl: Add ABMC feature in the command line options
Add a kernel command-line parameter to enable or disable the exposure of
the ABMC (Assignable Bandwidth Monitoring Counters) hardware feature to
resctrl.
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
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 2 | ||||
| -rw-r--r-- | Documentation/filesystems/resctrl.rst | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/core.c | 2 |
3 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 5a7a83c411e9..889e68e83682 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6155,7 +6155,7 @@ rdt= [HW,X86,RDT] Turn on/off individual RDT features. List is: cmt, mbmtotal, mbmlocal, l3cat, l3cdp, l2cat, l2cdp, - mba, smba, bmec. + mba, smba, bmec, abmc. E.g. to turn on cmt and turn off mba use: rdt=cmt,!mba diff --git a/Documentation/filesystems/resctrl.rst b/Documentation/filesystems/resctrl.rst index c7949dd44f2f..c97fd77a107d 100644 --- a/Documentation/filesystems/resctrl.rst +++ b/Documentation/filesystems/resctrl.rst @@ -26,6 +26,7 @@ MBM (Memory Bandwidth Monitoring) "cqm_mbm_total", "cqm_mbm_local" MBA (Memory Bandwidth Allocation) "mba" SMBA (Slow Memory Bandwidth Allocation) "" BMEC (Bandwidth Monitoring Event Configuration) "" +ABMC (Assignable Bandwidth Monitoring Counters) "" =============================================== ================================ Historically, new features were made visible by default in /proc/cpuinfo. This diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index fbf019c1ff11..b07b12a05886 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -711,6 +711,7 @@ enum { RDT_FLAG_MBA, RDT_FLAG_SMBA, RDT_FLAG_BMEC, + RDT_FLAG_ABMC, }; #define RDT_OPT(idx, n, f) \ @@ -736,6 +737,7 @@ static struct rdt_options rdt_options[] __ro_after_init = { RDT_OPT(RDT_FLAG_MBA, "mba", X86_FEATURE_MBA), RDT_OPT(RDT_FLAG_SMBA, "smba", X86_FEATURE_SMBA), RDT_OPT(RDT_FLAG_BMEC, "bmec", X86_FEATURE_BMEC), + RDT_OPT(RDT_FLAG_ABMC, "abmc", X86_FEATURE_ABMC), }; #define NUM_RDT_OPTIONS ARRAY_SIZE(rdt_options) |