Commit-ID: 31516de306c0c9235156cdc7acb976ea21f1f646 Gitweb: https://git.kernel.org/tip/31516de306c0c9235156cdc7acb976ea21f1f646 Author: Fenghua Yu <fenghua...@intel.com> AuthorDate: Wed, 20 Dec 2017 14:57:24 -0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Thu, 18 Jan 2018 09:33:32 +0100
x86/intel_rdt: Add command line parameter to control L2_CDP L2 CDP can be controlled by kernel parameter "rdt=". If "rdt=l2cdp", L2 CDP is turned on. If "rdt=!l2cdp", L2 CDP is turned off. Signed-off-by: Fenghua Yu <fenghua...@intel.com> Signed-off-by: Thomas Gleixner <t...@linutronix.de> Cc: "Ravi V Shankar" <ravi.v.shan...@intel.com> Cc: "Tony Luck" <tony.l...@intel.com> Cc: Vikas" <vikas.shiva...@intel.com> Cc: Sai Praneeth" <sai.praneeth.prak...@intel.com> Cc: Reinette" <reinette.cha...@intel.com> Link: https://lkml.kernel.org/r/1513810644-78015-7-git-send-email-fenghua...@intel.com --- Documentation/admin-guide/kernel-parameters.txt | 3 ++- arch/x86/kernel/cpu/intel_rdt.c | 2 ++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 46b26bf..fde058c 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3682,7 +3682,8 @@ rdt= [HW,X86,RDT] Turn on/off individual RDT features. List is: - cmt, mbmtotal, mbmlocal, l3cat, l3cdp, l2cat, mba. + cmt, mbmtotal, mbmlocal, l3cat, l3cdp, l2cat, l2cdp, + mba. E.g. to turn on cmt and turn off mba use: rdt=cmt,!mba diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index 5202da0..410629f 100644 --- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -691,6 +691,7 @@ enum { RDT_FLAG_L3_CAT, RDT_FLAG_L3_CDP, RDT_FLAG_L2_CAT, + RDT_FLAG_L2_CDP, RDT_FLAG_MBA, }; @@ -713,6 +714,7 @@ static struct rdt_options rdt_options[] __initdata = { RDT_OPT(RDT_FLAG_L3_CAT, "l3cat", X86_FEATURE_CAT_L3), RDT_OPT(RDT_FLAG_L3_CDP, "l3cdp", X86_FEATURE_CDP_L3), 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), }; #define NUM_RDT_OPTIONS ARRAY_SIZE(rdt_options)
