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Message-ID: <166257364128.1043018.12636485490608845145.stgit@bmoger-ubuntu>
Date: Wed, 7 Sep 2022 13:00:41 -0500
From: Babu Moger <babu.moger@....com>
To: <corbet@....net>, <reinette.chatre@...el.com>,
<tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>
CC: <fenghua.yu@...el.com>, <dave.hansen@...ux.intel.com>,
<x86@...nel.org>, <hpa@...or.com>, <paulmck@...nel.org>,
<akpm@...ux-foundation.org>, <quic_neeraju@...cinc.com>,
<rdunlap@...radead.org>, <damien.lemoal@...nsource.wdc.com>,
<songmuchun@...edance.com>, <peterz@...radead.org>,
<jpoimboe@...nel.org>, <pbonzini@...hat.com>, <babu.moger@....com>,
<chang.seok.bae@...el.com>, <pawan.kumar.gupta@...ux.intel.com>,
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<james.morse@....com>, <linux-doc@...r.kernel.org>,
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<eranian@...gle.com>
Subject: [PATCH v4 06/13] x86/resctrl: Include new features in command line
options
Add the command line options to disable the new features.
smba : Slow Memory Bandwidth Allocation
mbec : Bandwidth Monitor Event Configuration.
Signed-off-by: Babu Moger <babu.moger@....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 d7f30902fda0..c109fecb93ea 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5169,7 +5169,7 @@
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 a7e9aabff8c8..53fbc3acad81 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -700,6 +700,8 @@ enum {
RDT_FLAG_L2_CAT,
RDT_FLAG_L2_CDP,
RDT_FLAG_MBA,
+ RDT_FLAG_SMBA,
+ RDT_FLAG_BMEC,
};
#define RDT_OPT(idx, n, f) \
@@ -723,6 +725,8 @@ 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)
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