lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-Id: <1513810644-78015-7-git-send-email-fenghua.yu@intel.com> Date: Wed, 20 Dec 2017 14:57:24 -0800 From: "Fenghua Yu" <fenghua.yu@...el.com> To: "Thomas Gleixner" <tglx@...utronix.de>, "Ingo Molnar" <mingo@...e.hu>, "H. Peter Anvin" <hpa@...ux.intel.com>, "Tony Luck" <tony.luck@...el.com>, "Shivappa, Vikas" <vikas.shivappa@...el.com>, "Ravi V Shankar" <ravi.v.shankar@...el.com>, "Prakhya, Sai Praneeth" <sai.praneeth.prakhya@...el.com>, "Chatre, Reinette" <reinette.chatre@...el.com>, "linux-kernel" <linux-kernel@...r.kernel.org>, "x86" <x86@...nel.org> Cc: Fenghua Yu <fenghua.yu@...el.com> Subject: [PATCH 6/6] x86/intel_rdt: Turn on/off L2 CDP in kernel parameter From: Fenghua Yu <fenghua.yu@...el.com> L2 CDP can be turned on or off 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.yu@...el.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 0549662..077eebc 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3623,7 +3623,8 @@ 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 a739a32..25cfb17 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 @@ struct rdt_options { 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) -- 1.8.3.1
Powered by blists - more mailing lists