arm64/perf: Assert all platform event flags are within PERF_EVENT_FLAG_ARCH

Ensure all platform specific event flags are within PERF_EVENT_FLAG_ARCH.

Signed-off-by: Anshuman Khandual <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Reviewed-by: James Clark <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

Author: Anshuman Khandual

drivers/perf/arm_spe_pmu.c

@@ -44,7 +44,9 @@
  * This allows us to perform the check, i.e, perfmon_capable(),
  * in the context of the event owner, once, during the event_init().
  */
-#define SPE_PMU_HW_FLAGS_CX			BIT(0)
+#define SPE_PMU_HW_FLAGS_CX			0x00001
+
+static_assert((PERF_EVENT_FLAG_ARCH & SPE_PMU_HW_FLAGS_CX) == SPE_PMU_HW_FLAGS_CX);
 
 static void set_spe_event_has_cx(struct perf_event *event)
 {

include/linux/perf/arm_pmu.h

@@ -24,10 +24,11 @@
 /*
  * ARM PMU hw_event flags
  */
-/* Event uses a 64bit counter */
-#define ARMPMU_EVT_64BIT		1
-/* Event uses a 47bit counter */
-#define ARMPMU_EVT_47BIT		2
+#define ARMPMU_EVT_64BIT		0x00001 /* Event uses a 64bit counter */
+#define ARMPMU_EVT_47BIT		0x00002 /* Event uses a 47bit counter */
+
+static_assert((PERF_EVENT_FLAG_ARCH & ARMPMU_EVT_64BIT) == ARMPMU_EVT_64BIT);
+static_assert((PERF_EVENT_FLAG_ARCH & ARMPMU_EVT_47BIT) == ARMPMU_EVT_47BIT);
 
 #define HW_OP_UNSUPPORTED		0xFFFF
 #define C(_x)				PERF_COUNT_HW_CACHE_##_x