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authorJing Zhang <renyu.zj@linux.alibaba.com>2023-06-20 10:12:33 +0300
committerWill Deacon <will@kernel.org>2023-07-27 14:57:04 +0300
commitcbbc6fdd85be6cd748d6c6db23c1d5be6b04161e (patch)
tree859655dc407d33c5142e97a4b4b9a58bd674efe9 /drivers/perf
parent6eaae198076080886b9e7d57f4ae06fa782f90ef (diff)
downloadlinux-cbbc6fdd85be6cd748d6c6db23c1d5be6b04161e.tar.xz
driver/perf: Add identifier sysfs file for Yitian 710 DDR
To allow userspace to identify the specific implementation of the device, add an "identifier" sysfs file. The perf tool can match the Yitian 710 DDR metric through the identifier. Signed-off-by: Jing Zhang <renyu.zj@linux.alibaba.com> Acked-by: Ian Rogers <irogers@google.com> Reviewed-by: Shuai Xue <xueshuai@linux.alibaba.com> Link: https://lore.kernel.org/r/1687245156-61215-2-git-send-email-renyu.zj@linux.alibaba.com Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf')
-rw-r--r--drivers/perf/alibaba_uncore_drw_pmu.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/perf/alibaba_uncore_drw_pmu.c b/drivers/perf/alibaba_uncore_drw_pmu.c
index 5c5be9fc1b15..19d459a36be5 100644
--- a/drivers/perf/alibaba_uncore_drw_pmu.c
+++ b/drivers/perf/alibaba_uncore_drw_pmu.c
@@ -236,10 +236,37 @@ static const struct attribute_group ali_drw_pmu_cpumask_attr_group = {
.attrs = ali_drw_pmu_cpumask_attrs,
};
+static ssize_t ali_drw_pmu_identifier_show(struct device *dev,
+ struct device_attribute *attr,
+ char *page)
+{
+ return sysfs_emit(page, "%s\n", "ali_drw_pmu");
+}
+
+static umode_t ali_drw_pmu_identifier_attr_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ return attr->mode;
+}
+
+static struct device_attribute ali_drw_pmu_identifier_attr =
+ __ATTR(identifier, 0444, ali_drw_pmu_identifier_show, NULL);
+
+static struct attribute *ali_drw_pmu_identifier_attrs[] = {
+ &ali_drw_pmu_identifier_attr.attr,
+ NULL
+};
+
+static const struct attribute_group ali_drw_pmu_identifier_attr_group = {
+ .attrs = ali_drw_pmu_identifier_attrs,
+ .is_visible = ali_drw_pmu_identifier_attr_visible
+};
+
static const struct attribute_group *ali_drw_pmu_attr_groups[] = {
&ali_drw_pmu_events_attr_group,
&ali_drw_pmu_cpumask_attr_group,
&ali_drw_pmu_format_group,
+ &ali_drw_pmu_identifier_attr_group,
NULL,
};