[PATCH v2 1/9] perf: Add EVENT_ATTR_ID to simplify event attributes
From: Qi Liu <hidden>
Date: 2021-05-19 09:52:25
Also in:
lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
Similar EVENT_ATTR macros are defined in many PMU drivers, like HiSilicon PMU driver, Arm PMU driver, Arm SMMU PMU driver. So Add a generic macro to simplify code. Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Qi Liu <redacted> --- include/linux/perf_event.h | 6 ++++++ kernel/events/core.c | 2 ++ 2 files changed, 8 insertions(+)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index f5a6a2f..d0aa74e 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h@@ -1576,6 +1576,12 @@ static struct perf_pmu_events_attr _var = { \ .event_str = _str, \ }; +#define PMU_EVENT_ATTR_ID(_name, _id) \ + (&((struct perf_pmu_events_attr[]) { \ + { .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \ + .id = _id, } \ + })[0].attr.attr) + #define PMU_FORMAT_ATTR(_name, _format) \ static ssize_t \ _name##_show(struct device *dev, \
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 0ac818b..330d9cc 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c@@ -13295,6 +13295,8 @@ ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr, if (pmu_attr->event_str) return sprintf(page, "%s\n", pmu_attr->event_str); + else + return sprintf(page, "config=%#llx\n", pmu_attr->id); return 0; }
--
2.7.4
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