RE: [PATCH v9 04/13] x86/resctrl: Include new features in command line options

[Moger, Babu]

[AMD Official Use Only - General]



> -----Original Message-----
> From: Reinette Chatre <reinette.chatre@xxxxxxxxx>
> Sent: Thursday, December 15, 2022 11:12 AM
> To: Moger, Babu <Babu.Moger@xxxxxxx>; corbet@xxxxxxx;
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> Subject: Re: [PATCH v9 04/13] x86/resctrl: Include new features in command
> line options
> 
> 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>

Thanks 
Babu
> 
> Reinette