linux-kernel - [tip: x86/cache] x86/resctrl: Include new features in command line options

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Message-ID: <167455239757.4906.11241332307553202930.tip-bot2@tip-bot2>
Date:   Tue, 24 Jan 2023 09:26:37 -0000
From:   "tip-bot2 for Babu Moger" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Babu Moger <babu.moger@....com>,
        "Borislav Petkov (AMD)" <bp@...en8.de>,
        Reinette Chatre <reinette.chatre@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/cache] x86/resctrl: Include new features in command line options

The following commit has been merged into the x86/cache branch of tip:

Commit-ID:     a76f65c89f928b87c49d88b7fd60cb4d7203ffff
Gitweb:        https://git.kernel.org/tip/a76f65c89f928b87c49d88b7fd60cb4d7203ffff
Author:        Babu Moger <babu.moger@....com>
AuthorDate:    Fri, 13 Jan 2023 09:20:31 -06:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Mon, 23 Jan 2023 17:38:38 +01:00

x86/resctrl: Include new features in command line options

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@....com>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>
Link: https://lore.kernel.org/r/20230113152039.770054-6-babu.moger@amd.com
---
 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 6cfa6e3..0ee8911 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5221,7 +5221,7 @@
 	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 f6af3ac..10a8c9d 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)