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From: Babu Moger <babu.moger@amd.com>
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Subject: [RFC PATCH v3 02/17] x86/resctrl: Add ABMC feature in the command line options
Date: Thu, 28 Mar 2024 20:06:35 -0500
Message-ID: <eecacbc657f39c863fe831da3166e08753085d1a.1711674410.git.babu.moger@amd.com>
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Add the command line options to enable or disable the new resctrl feature
ABMC (Assignable Bandwidth Monitoring Counters).

Signed-off-by: Babu Moger <babu.moger@amd.com>

---
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 bb884c14b2f6..b3a2e7f72462 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5551,7 +5551,7 @@
 	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 6c245582d8fb..68df7751d1f5 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 83e40341583e..57a8c6f30dd6 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -664,6 +664,7 @@ enum {
 	RDT_FLAG_MBA,
 	RDT_FLAG_SMBA,
 	RDT_FLAG_BMEC,
+	RDT_FLAG_ABMC,
 };
 
 #define RDT_OPT(idx, n, f)	\
@@ -689,6 +690,7 @@ 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