Hi Babu,
On 12/1/2022 7:36 AM, Babu Moger wrote:
> Add the command line options to enable or disable the new resctrl features.
> smba : Slow Memory Bandwidth Allocation
> bmec : Bandwidth Monitor Event Configuration.
>
> Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 2 +-
> arch/x86/kernel/cpu/resctrl/core.c | 4 ++++
> 2 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 42af9ca0127e..a7b6634f4426 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -5190,7 +5190,7 @@
> rdt= [HW,X86,RDT]
> Turn on/off individual RDT features. List is:
> cmt, mbmtotal, mbmlocal, l3cat, l3cdp, l2cat, l2cdp,
> - mba.
> + mba, smba, bmec.
> E.g. to turn on cmt and turn off mba use:
> rdt=cmt,!mba
>
> diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
> index f6af3ac1ef20..10a8c9d96f32 100644
> --- a/arch/x86/kernel/cpu/resctrl/core.c
> +++ b/arch/x86/kernel/cpu/resctrl/core.c
> @@ -659,6 +659,8 @@ enum {
> RDT_FLAG_L2_CAT,
> RDT_FLAG_L2_CDP,
> RDT_FLAG_MBA,
> + RDT_FLAG_SMBA,
> + RDT_FLAG_BMEC,
> };
>
> #define RDT_OPT(idx, n, f) \
> @@ -682,6 +684,8 @@ static struct rdt_options rdt_options[] __initdata = {
> RDT_OPT(RDT_FLAG_L2_CAT, "l2cat", X86_FEATURE_CAT_L2),
> RDT_OPT(RDT_FLAG_L2_CDP, "l2cdp", X86_FEATURE_CDP_L2),
> 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),
> };
> #define NUM_RDT_OPTIONS ARRAY_SIZE(rdt_options)
>
>
>
Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Reinette
