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[PATCH v2 7/7] perf/amd/ibs: Advertise remote socket capability

Ravi Bangoria posted 7 patches 1 month, 2 weeks ago
[PATCH v2 7/7] perf/amd/ibs: Advertise remote socket capability
Posted by Ravi Bangoria 1 month, 2 weeks ago 
IBS OP on future hardware can indicate data source from remote socket
as well. Advertise this capability to userspace so that userspace tools
can decode IBS data accordingly.

Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
---
 arch/x86/events/amd/ibs.c      | 19 +++++++++++++++++++
 arch/x86/include/asm/amd/ibs.h |  3 ++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index 0a8313ea6331..eeb607b84dda 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -730,6 +730,7 @@ PMU_EVENT_ATTR_STRING(fetchlat, ibs_fetch_lat_format, "config1:0-10");
 PMU_EVENT_ATTR_STRING(fetchlat, ibs_fetch_lat_cap, "1");
 PMU_EVENT_ATTR_STRING(strmst, ibs_op_strmst_format, "config1:12");
 PMU_EVENT_ATTR_STRING(strmst, ibs_op_strmst_cap, "1");
+PMU_EVENT_ATTR_STRING(rmtsocket, ibs_op_rmtsocket_cap, "1");
 
 static umode_t
 zen4_ibs_extensions_is_visible(struct kobject *kobj, struct attribute *attr, int i)
@@ -749,6 +750,12 @@ ibs_op_strmst_is_visible(struct kobject *kobj, struct attribute *attr, int i)
 	return ibs_caps & IBS_CAPS_STRMST_RMTSOCKET ? attr->mode : 0;
 }
 
+static umode_t
+ibs_op_rmtsocket_is_visible(struct kobject *kobj, struct attribute *attr, int i)
+{
+	return ibs_caps & IBS_CAPS_STRMST_RMTSOCKET ? attr->mode : 0;
+}
+
 static umode_t
 ibs_op_ldlat_is_visible(struct kobject *kobj, struct attribute *attr, int i)
 {
@@ -802,6 +809,11 @@ static struct attribute *ibs_op_strmst_cap_attrs[] = {
 	NULL,
 };
 
+static struct attribute *ibs_op_rmtsocket_cap_attrs[] = {
+	&ibs_op_rmtsocket_cap.attr.attr,
+	NULL,
+};
+
 static struct attribute_group group_fetch_formats = {
 	.name = "format",
 	.attrs = fetch_attrs,
@@ -849,6 +861,12 @@ static struct attribute_group group_ibs_op_strmst_cap = {
 	.is_visible = ibs_op_strmst_is_visible,
 };
 
+static struct attribute_group group_ibs_op_rmtsocket_cap = {
+	.name = "caps",
+	.attrs = ibs_op_rmtsocket_cap_attrs,
+	.is_visible = ibs_op_rmtsocket_is_visible,
+};
+
 static const struct attribute_group *fetch_attr_groups[] = {
 	&group_fetch_formats,
 	&empty_caps_group,
@@ -938,6 +956,7 @@ static const struct attribute_group *op_attr_update[] = {
 	&group_ibs_op_dtlb_pgsize_cap,
 	&group_ibs_op_strmst_cap,
 	&group_ibs_op_strmst_format,
+	&group_ibs_op_rmtsocket_cap,
 	NULL,
 };
 
diff --git a/arch/x86/include/asm/amd/ibs.h b/arch/x86/include/asm/amd/ibs.h
index 020916eb7b4e..4eac36c42db6 100644
--- a/arch/x86/include/asm/amd/ibs.h
+++ b/arch/x86/include/asm/amd/ibs.h
@@ -100,7 +100,8 @@ union ibs_op_data2 {
 			cache_hit_st:1,	/* 5: cache hit state */
 			data_src_hi:2,	/* 6-7: data source high */
 			strm_st:1,	/* 8: streaming store */
-			reserved1:55;	/* 9-63: reserved */
+			rmt_socket:1,   /* 9: remote socket */
+			reserved1:54;   /* 10-63: reserved */
 	};
 };
 
-- 
2.43.0
[tip: perf/core] perf/amd/ibs: Advertise remote socket capability
Posted by tip-bot2 for Ravi Bangoria 1 month ago 
The following commit has been merged into the perf/core branch of tip:

Commit-ID:     b2ea0f541d354c10186a894e8bf5bf83abf8a517
Gitweb:        https://git.kernel.org/tip/b2ea0f541d354c10186a894e8bf5bf83abf8a517
Author:        Ravi Bangoria <ravi.bangoria@amd.com>
AuthorDate:    Mon, 16 Feb 2026 04:25:30 
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Sat, 28 Feb 2026 12:03:29 +01:00

perf/amd/ibs: Advertise remote socket capability

IBS OP on future hardware can indicate data source from remote socket
as well. Advertise this capability to userspace so that userspace tools
can decode IBS data accordingly.

Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260216042530.1546-8-ravi.bangoria@amd.com
---
 arch/x86/events/amd/ibs.c      | 19 +++++++++++++++++++
 arch/x86/include/asm/amd/ibs.h |  3 ++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index 0a8313e..eeb607b 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -730,6 +730,7 @@ PMU_EVENT_ATTR_STRING(fetchlat, ibs_fetch_lat_format, "config1:0-10");
 PMU_EVENT_ATTR_STRING(fetchlat, ibs_fetch_lat_cap, "1");
 PMU_EVENT_ATTR_STRING(strmst, ibs_op_strmst_format, "config1:12");
 PMU_EVENT_ATTR_STRING(strmst, ibs_op_strmst_cap, "1");
+PMU_EVENT_ATTR_STRING(rmtsocket, ibs_op_rmtsocket_cap, "1");
 
 static umode_t
 zen4_ibs_extensions_is_visible(struct kobject *kobj, struct attribute *attr, int i)
@@ -750,6 +751,12 @@ ibs_op_strmst_is_visible(struct kobject *kobj, struct attribute *attr, int i)
 }
 
 static umode_t
+ibs_op_rmtsocket_is_visible(struct kobject *kobj, struct attribute *attr, int i)
+{
+	return ibs_caps & IBS_CAPS_STRMST_RMTSOCKET ? attr->mode : 0;
+}
+
+static umode_t
 ibs_op_ldlat_is_visible(struct kobject *kobj, struct attribute *attr, int i)
 {
 	return ibs_caps & IBS_CAPS_OPLDLAT ? attr->mode : 0;
@@ -802,6 +809,11 @@ static struct attribute *ibs_op_strmst_cap_attrs[] = {
 	NULL,
 };
 
+static struct attribute *ibs_op_rmtsocket_cap_attrs[] = {
+	&ibs_op_rmtsocket_cap.attr.attr,
+	NULL,
+};
+
 static struct attribute_group group_fetch_formats = {
 	.name = "format",
 	.attrs = fetch_attrs,
@@ -849,6 +861,12 @@ static struct attribute_group group_ibs_op_strmst_cap = {
 	.is_visible = ibs_op_strmst_is_visible,
 };
 
+static struct attribute_group group_ibs_op_rmtsocket_cap = {
+	.name = "caps",
+	.attrs = ibs_op_rmtsocket_cap_attrs,
+	.is_visible = ibs_op_rmtsocket_is_visible,
+};
+
 static const struct attribute_group *fetch_attr_groups[] = {
 	&group_fetch_formats,
 	&empty_caps_group,
@@ -938,6 +956,7 @@ static const struct attribute_group *op_attr_update[] = {
 	&group_ibs_op_dtlb_pgsize_cap,
 	&group_ibs_op_strmst_cap,
 	&group_ibs_op_strmst_format,
+	&group_ibs_op_rmtsocket_cap,
 	NULL,
 };
 
diff --git a/arch/x86/include/asm/amd/ibs.h b/arch/x86/include/asm/amd/ibs.h
index 020916e..4eac36c 100644
--- a/arch/x86/include/asm/amd/ibs.h
+++ b/arch/x86/include/asm/amd/ibs.h
@@ -100,7 +100,8 @@ union ibs_op_data2 {
 			cache_hit_st:1,	/* 5: cache hit state */
 			data_src_hi:2,	/* 6-7: data source high */
 			strm_st:1,	/* 8: streaming store */
-			reserved1:55;	/* 9-63: reserved */
+			rmt_socket:1,   /* 9: remote socket */
+			reserved1:54;   /* 10-63: reserved */
 	};
 };
[tip: perf/core] perf/amd/ibs: Advertise remote socket capability
Posted by tip-bot2 for Ravi Bangoria 1 month ago 
The following commit has been merged into the perf/core branch of tip:

Commit-ID:     65772b382a9865a5480ee527f3fa6e606fafc0e7
Gitweb:        https://git.kernel.org/tip/65772b382a9865a5480ee527f3fa6e606fafc0e7
Author:        Ravi Bangoria <ravi.bangoria@amd.com>
AuthorDate:    Mon, 16 Feb 2026 04:25:30 
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Fri, 27 Feb 2026 16:40:25 +01:00

perf/amd/ibs: Advertise remote socket capability

IBS OP on future hardware can indicate data source from remote socket
as well. Advertise this capability to userspace so that userspace tools
can decode IBS data accordingly.

Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260216042530.1546-8-ravi.bangoria@amd.com
---
 arch/x86/events/amd/ibs.c      | 19 +++++++++++++++++++
 arch/x86/include/asm/amd/ibs.h |  3 ++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index 0a8313e..eeb607b 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -730,6 +730,7 @@ PMU_EVENT_ATTR_STRING(fetchlat, ibs_fetch_lat_format, "config1:0-10");
 PMU_EVENT_ATTR_STRING(fetchlat, ibs_fetch_lat_cap, "1");
 PMU_EVENT_ATTR_STRING(strmst, ibs_op_strmst_format, "config1:12");
 PMU_EVENT_ATTR_STRING(strmst, ibs_op_strmst_cap, "1");
+PMU_EVENT_ATTR_STRING(rmtsocket, ibs_op_rmtsocket_cap, "1");
 
 static umode_t
 zen4_ibs_extensions_is_visible(struct kobject *kobj, struct attribute *attr, int i)
@@ -750,6 +751,12 @@ ibs_op_strmst_is_visible(struct kobject *kobj, struct attribute *attr, int i)
 }
 
 static umode_t
+ibs_op_rmtsocket_is_visible(struct kobject *kobj, struct attribute *attr, int i)
+{
+	return ibs_caps & IBS_CAPS_STRMST_RMTSOCKET ? attr->mode : 0;
+}
+
+static umode_t
 ibs_op_ldlat_is_visible(struct kobject *kobj, struct attribute *attr, int i)
 {
 	return ibs_caps & IBS_CAPS_OPLDLAT ? attr->mode : 0;
@@ -802,6 +809,11 @@ static struct attribute *ibs_op_strmst_cap_attrs[] = {
 	NULL,
 };
 
+static struct attribute *ibs_op_rmtsocket_cap_attrs[] = {
+	&ibs_op_rmtsocket_cap.attr.attr,
+	NULL,
+};
+
 static struct attribute_group group_fetch_formats = {
 	.name = "format",
 	.attrs = fetch_attrs,
@@ -849,6 +861,12 @@ static struct attribute_group group_ibs_op_strmst_cap = {
 	.is_visible = ibs_op_strmst_is_visible,
 };
 
+static struct attribute_group group_ibs_op_rmtsocket_cap = {
+	.name = "caps",
+	.attrs = ibs_op_rmtsocket_cap_attrs,
+	.is_visible = ibs_op_rmtsocket_is_visible,
+};
+
 static const struct attribute_group *fetch_attr_groups[] = {
 	&group_fetch_formats,
 	&empty_caps_group,
@@ -938,6 +956,7 @@ static const struct attribute_group *op_attr_update[] = {
 	&group_ibs_op_dtlb_pgsize_cap,
 	&group_ibs_op_strmst_cap,
 	&group_ibs_op_strmst_format,
+	&group_ibs_op_rmtsocket_cap,
 	NULL,
 };
 
diff --git a/arch/x86/include/asm/amd/ibs.h b/arch/x86/include/asm/amd/ibs.h
index 020916e..4eac36c 100644
--- a/arch/x86/include/asm/amd/ibs.h
+++ b/arch/x86/include/asm/amd/ibs.h
@@ -100,7 +100,8 @@ union ibs_op_data2 {
 			cache_hit_st:1,	/* 5: cache hit state */
 			data_src_hi:2,	/* 6-7: data source high */
 			strm_st:1,	/* 8: streaming store */
-			reserved1:55;	/* 9-63: reserved */
+			rmt_socket:1,   /* 9: remote socket */
+			reserved1:54;   /* 10-63: reserved */
 	};
 };

Patchew 2.1-devel-ea86937

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