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| author |   Ravi Bangoria <ravi.bangoria@amd.com> | 2022-05-09 10:19:10 +0530 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2022-05-11 16:27:10 +0200 |
| commit | 838de1d843fc9b6161e0e1c6308a8c027d08606d (patch) | |
| tree | 312a40c4a0a12d222db387c5f95e7e165ff14e75 /arch/x86/events/amd/ibs.c | |
| parent | perf/amd/ibs: Add support for L3 miss filtering (diff) | |
| download | linux-dev-838de1d843fc9b6161e0e1c6308a8c027d08606d.tar.xz linux-dev-838de1d843fc9b6161e0e1c6308a8c027d08606d.zip | |
perf/amd/ibs: Advertise zen4_ibs_extensions as pmu capability attribute
PMU driver can advertise certain feature via capability attribute('caps'
sysfs directory) which can be consumed by userspace tools like perf. Add
zen4_ibs_extensions capability attribute for IBS pmus. This attribute
will be enabled when CPUID_Fn8000001B_EAX[11] is set.
With patch on Zen4:
$ ls /sys/bus/event_source/devices/ibs_op/caps
zen4_ibs_extensions
Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220509044914.1473-5-ravi.bangoria@amd.com
Diffstat (limited to 'arch/x86/events/amd/ibs.c')
| -rw-r--r-- | arch/x86/events/amd/ibs.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c index 2dc8b7ec030a..c251bc44c088 100644 --- a/arch/x86/events/amd/ibs.c +++ b/arch/x86/events/amd/ibs.c @@ -537,8 +537,14 @@ static struct attribute_group empty_format_group = { .attrs = attrs_empty, }; +static struct attribute_group empty_caps_group = { + .name = "caps", + .attrs = attrs_empty, +}; + static const struct attribute_group *empty_attr_groups[] = { &empty_format_group, + &empty_caps_group, NULL, }; @@ -546,6 +552,7 @@ PMU_FORMAT_ATTR(rand_en, "config:57"); PMU_FORMAT_ATTR(cnt_ctl, "config:19"); PMU_EVENT_ATTR_STRING(l3missonly, fetch_l3missonly, "config:59"); PMU_EVENT_ATTR_STRING(l3missonly, op_l3missonly, "config:16"); +PMU_EVENT_ATTR_STRING(zen4_ibs_extensions, zen4_ibs_extensions, "1"); static umode_t zen4_ibs_extensions_is_visible(struct kobject *kobj, struct attribute *attr, int i) @@ -563,6 +570,11 @@ static struct attribute *fetch_l3missonly_attrs[] = { NULL, }; +static struct attribute *zen4_ibs_extensions_attrs[] = { + &zen4_ibs_extensions.attr.attr, + NULL, +}; + static struct attribute_group group_rand_en = { .name = "format", .attrs = rand_en_attrs, @@ -574,13 +586,21 @@ static struct attribute_group group_fetch_l3missonly = { .is_visible = zen4_ibs_extensions_is_visible, }; +static struct attribute_group group_zen4_ibs_extensions = { + .name = "caps", + .attrs = zen4_ibs_extensions_attrs, + .is_visible = zen4_ibs_extensions_is_visible, +}; + static const struct attribute_group *fetch_attr_groups[] = { &group_rand_en, + &empty_caps_group, NULL, }; static const struct attribute_group *fetch_attr_update[] = { &group_fetch_l3missonly, + &group_zen4_ibs_extensions, NULL, }; @@ -615,6 +635,7 @@ static struct attribute_group group_op_l3missonly = { static const struct attribute_group *op_attr_update[] = { &group_cnt_ctl, &group_op_l3missonly, + &group_zen4_ibs_extensions, NULL, }; |