perf: Add EVENT_ATTR_ID to simplify event attributes

Similar EVENT_ATTR macros are defined in many PMU drivers,
like 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 <liuqi115@huawei.com>
Link: https://lore.kernel.org/r/1623220863-58233-2-git-send-email-liuqi115@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index f5a6a2f069ed40cb0545cc270e36ddc52d044604..2d510ad750edc505451de783165aa1f955378277 100644 (file)
--- 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, _show, _id)                           \
+       (&((struct perf_pmu_events_attr[]) {                            \
+               { .attr = __ATTR(_name, 0444, _show, NULL),             \
+                 .id = _id, }                                          \
+       })[0].attr.attr)
+
 #define PMU_FORMAT_ATTR(_name, _format)                                        \
 static ssize_t                                                         \
 _name##_show(struct device *dev,                                       \