Add the command line option to enable or disable exposing the ABMC (Assignable Bandwidth Monitoring Counters) hardware feature to resctrl. Signed-off-by: Babu Moger <babu.moger@xxxxxxx> --- v8: Commit message update. v7: No changes v6: No changes v5: No changes v4: No changes v3: No changes v2: No changes --- Documentation/admin-guide/kernel-parameters.txt | 2 +- Documentation/arch/x86/resctrl.rst | 1 + arch/x86/kernel/cpu/resctrl/core.c | 2 ++ 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 1518343bbe22..b3b3ca564220 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5677,7 +5677,7 @@ 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/arch/x86/resctrl.rst b/Documentation/arch/x86/resctrl.rst index a824affd741d..30586728a4cd 100644 --- a/Documentation/arch/x86/resctrl.rst +++ b/Documentation/arch/x86/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 8591d53c144b..668148ceda0b 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -809,6 +809,7 @@ enum { RDT_FLAG_MBA, RDT_FLAG_SMBA, RDT_FLAG_BMEC, + RDT_FLAG_ABMC, }; #define RDT_OPT(idx, n, f) \ @@ -834,6 +835,7 @@ static struct rdt_options rdt_options[] __initdata = { 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) -- 2.34.1