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perf/amd/ibs: Advertise remote socket capability

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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
This commit is contained in:
Ravi Bangoria 2026-02-16 04:25:30 +00:00 committed by Peter Zijlstra
parent 8ae68bfec9
commit b2ea0f541d
2 changed files with 21 additions and 1 deletions
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19
arch/x86/events/amd/ibs.c
View File

@ -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,
};

3
arch/x86/include/asm/amd/ibs.h
View File

@ -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 */
};
};