linux-kernel - [PATCH v5 2/8] x86/resctrl: Add SDCIAE feature in the command line options

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <b6809db9ee6f39d8af6d6f13646ce6129f02519d.1747943499.git.babu.moger@amd.com>
Date: Thu, 22 May 2025 14:51:33 -0500
From: Babu Moger <babu.moger@....com>
To: <corbet@....net>, <tony.luck@...el.com>, <reinette.chatre@...el.com>,
	<Dave.Martin@....com>, <james.morse@....com>, <tglx@...utronix.de>,
	<mingo@...hat.com>, <bp@...en8.de>, <dave.hansen@...ux.intel.com>
CC: <x86@...nel.org>, <hpa@...or.com>, <akpm@...ux-foundation.org>,
	<rostedt@...dmis.org>, <paulmck@...nel.org>, <thuth@...hat.com>,
	<ardb@...nel.org>, <gregkh@...uxfoundation.org>, <thomas.lendacky@....com>,
	<seanjc@...gle.com>, <mario.limonciello@....com>, <perry.yuan@....com>,
	<kai.huang@...el.com>, <xiaoyao.li@...el.com>, <nikunj@....com>,
	<kan.liang@...ux.intel.com>, <xin3.li@...el.com>, <babu.moger@....com>,
	<andrew.cooper3@...rix.com>, <ebiggers@...gle.com>, <xin@...or.com>,
	<sohil.mehta@...el.com>, <Xiaojian.Du@....com>, <gautham.shenoy@....com>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v5 2/8] x86/resctrl: Add SDCIAE feature in the command line options

Add the command line options to enable or disable the new resctrl feature
L3 Smart Data Cache Injection Allocation Enforcement (SDCIAE).

Signed-off-by: Babu Moger <babu.moger@....com>
---
v5: No changes.

v4: No changes.

v3: No changes.

v2: No changes.
---
 Documentation/admin-guide/kernel-parameters.txt | 2 +-
 arch/x86/kernel/cpu/resctrl/core.c              | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index d9fd26b95b34..f63aa8c5671d 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5988,7 +5988,7 @@
 	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, sdciae.
 			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 224bed28f341..2161520114dc 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -704,6 +704,7 @@ enum {
 	RDT_FLAG_MBA,
 	RDT_FLAG_SMBA,
 	RDT_FLAG_BMEC,
+	RDT_FLAG_SDCIAE,
 };
 
 #define RDT_OPT(idx, n, f)	\
@@ -729,6 +730,7 @@ static struct rdt_options rdt_options[]  __ro_after_init = {
 	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_SDCIAE,    "sdciae",	X86_FEATURE_SDCIAE),
 };
 #define NUM_RDT_OPTIONS ARRAY_SIZE(rdt_options)
 
-- 
2.34.1