[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <d8ecf00a8369ef433fbaa56817a3a1e7d53bb756.1716552602.git.babu.moger@amd.com>
Date: Fri, 24 May 2024 07:23:21 -0500
From: Babu Moger <babu.moger@....com>
To: <corbet@....net>, <fenghua.yu@...el.com>, <reinette.chatre@...el.com>,
<tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>,
<dave.hansen@...ux.intel.com>
CC: <x86@...nel.org>, <hpa@...or.com>, <paulmck@...nel.org>,
<rdunlap@...radead.org>, <tj@...nel.org>, <peterz@...radead.org>,
<yanjiewtw@...il.com>, <babu.moger@....com>, <kim.phillips@....com>,
<lukas.bulwahn@...il.com>, <seanjc@...gle.com>, <jmattson@...gle.com>,
<leitao@...ian.org>, <jpoimboe@...nel.org>, <rick.p.edgecombe@...el.com>,
<kirill.shutemov@...ux.intel.com>, <jithu.joseph@...el.com>,
<kai.huang@...el.com>, <kan.liang@...ux.intel.com>,
<daniel.sneddon@...ux.intel.com>, <pbonzini@...hat.com>,
<sandipan.das@....com>, <ilpo.jarvinen@...ux.intel.com>,
<peternewman@...gle.com>, <maciej.wieczor-retman@...el.com>,
<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<eranian@...gle.com>, <james.morse@....com>
Subject: [PATCH v4 02/19] x86/resctrl: Add ABMC feature in the command line options
Add the command line option to enable or disable the new resctrl feature
ABMC (Assignable Bandwidth Monitoring Counters).
Signed-off-by: Babu Moger <babu.moger@....com>
---
v4: No changes
v3: No changes
v2: No changes
---
Documentation/admin-guide/kernel-parameters.txt | 2 +-
Documentation/arch/x86/resctrl.rst | 1 +
arch/x86/kernel/cpu/resctrl/core.c | 2 ++
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 500cfa776225..66a1be9d0ea6 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5602,7 +5602,7 @@
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, abmc.
E.g. to turn on cmt and turn off mba use:
rdt=cmt,!mba
diff --git a/Documentation/arch/x86/resctrl.rst b/Documentation/arch/x86/resctrl.rst
index 627e23869bca..02790efaabcc 100644
--- a/Documentation/arch/x86/resctrl.rst
+++ b/Documentation/arch/x86/resctrl.rst
@@ -26,6 +26,7 @@ MBM (Memory Bandwidth Monitoring) "cqm_mbm_total", "cqm_mbm_local"
MBA (Memory Bandwidth Allocation) "mba"
SMBA (Slow Memory Bandwidth Allocation) ""
BMEC (Bandwidth Monitoring Event Configuration) ""
+ABMC (Assignable Bandwidth Monitoring Counters) ""
=============================================== ================================
Historically, new features were made visible by default in /proc/cpuinfo. This
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index a113d9aba553..df1b43fd9f0e 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -651,6 +651,7 @@ enum {
RDT_FLAG_MBA,
RDT_FLAG_SMBA,
RDT_FLAG_BMEC,
+ RDT_FLAG_ABMC,
};
#define RDT_OPT(idx, n, f) \
@@ -676,6 +677,7 @@ static struct rdt_options rdt_options[] __initdata = {
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_ABMC, "abmc", X86_FEATURE_ABMC),
};
#define NUM_RDT_OPTIONS ARRAY_SIZE(rdt_options)
--
2.34.1
Powered by blists - more mailing lists