x86/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 <anshuman.khandual@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: James Clark <james.clark@arm.com>
Link: https://lkml.kernel.org/r/20220907091924.439193-5-anshuman.khandual@arm.com

diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index 93263b9..4a3dde2 100644 (file)
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -64,27 +64,25 @@ static inline bool constraint_match(struct event_constraint *c, u64 ecode)
        return ((ecode & c->cmask) - c->code) <= (u64)c->size;
 }
 
+#define PERF_ARCH(name, val)   \
+       PERF_X86_EVENT_##name = val,
+
 /*
  * struct hw_perf_event.flags flags
  */
-#define PERF_X86_EVENT_PEBS_LDLAT      0x00001 /* ld+ldlat data address sampling */
-#define PERF_X86_EVENT_PEBS_ST         0x00002 /* st data address sampling */
-#define PERF_X86_EVENT_PEBS_ST_HSW     0x00004 /* haswell style datala, store */
-#define PERF_X86_EVENT_PEBS_LD_HSW     0x00008 /* haswell style datala, load */
-#define PERF_X86_EVENT_PEBS_NA_HSW     0x00010 /* haswell style datala, unknown */
-#define PERF_X86_EVENT_EXCL            0x00020 /* HT exclusivity on counter */
-#define PERF_X86_EVENT_DYNAMIC         0x00040 /* dynamic alloc'd constraint */
-
-#define PERF_X86_EVENT_EXCL_ACCT       0x00100 /* accounted EXCL event */
-#define PERF_X86_EVENT_AUTO_RELOAD     0x00200 /* use PEBS auto-reload */
-#define PERF_X86_EVENT_LARGE_PEBS      0x00400 /* use large PEBS */
-#define PERF_X86_EVENT_PEBS_VIA_PT     0x00800 /* use PT buffer for PEBS */
-#define PERF_X86_EVENT_PAIR            0x01000 /* Large Increment per Cycle */
-#define PERF_X86_EVENT_LBR_SELECT      0x02000 /* Save/Restore MSR_LBR_SELECT */
-#define PERF_X86_EVENT_TOPDOWN         0x04000 /* Count Topdown slots/metrics events */
-#define PERF_X86_EVENT_PEBS_STLAT      0x08000 /* st+stlat data address sampling */
-#define PERF_X86_EVENT_AMD_BRS         0x10000 /* AMD Branch Sampling */
-#define PERF_X86_EVENT_PEBS_LAT_HYBRID 0x20000 /* ld and st lat for hybrid */
+enum {
+#include "perf_event_flags.h"
+};
+
+#undef PERF_ARCH
+
+#define PERF_ARCH(name, val)                                           \
+       static_assert((PERF_X86_EVENT_##name & PERF_EVENT_FLAG_ARCH) == \
+                     PERF_X86_EVENT_##name);
+
+#include "perf_event_flags.h"
+
+#undef PERF_ARCH
 
 static inline bool is_topdown_count(struct perf_event *event)
 {

diff --git a/arch/x86/events/perf_event_flags.h b/arch/x86/events/perf_event_flags.h
new file mode 100644 (file)
index 0000000..1dc19b9
--- /dev/null
+++ b/arch/x86/events/perf_event_flags.h
@@ -0,0 +1,22 @@
+
+/*
+ * struct hw_perf_event.flags flags
+ */
+PERF_ARCH(PEBS_LDLAT,          0x00001) /* ld+ldlat data address sampling */
+PERF_ARCH(PEBS_ST,             0x00002) /* st data address sampling */
+PERF_ARCH(PEBS_ST_HSW,         0x00004) /* haswell style datala, store */
+PERF_ARCH(PEBS_LD_HSW,         0x00008) /* haswell style datala, load */
+PERF_ARCH(PEBS_NA_HSW,         0x00010) /* haswell style datala, unknown */
+PERF_ARCH(EXCL,                        0x00020) /* HT exclusivity on counter */
+PERF_ARCH(DYNAMIC,             0x00040) /* dynamic alloc'd constraint */
+                       /*      0x00080 */
+PERF_ARCH(EXCL_ACCT,           0x00100) /* accounted EXCL event */
+PERF_ARCH(AUTO_RELOAD,         0x00200) /* use PEBS auto-reload */
+PERF_ARCH(LARGE_PEBS,          0x00400) /* use large PEBS */
+PERF_ARCH(PEBS_VIA_PT,         0x00800) /* use PT buffer for PEBS */
+PERF_ARCH(PAIR,                        0x01000) /* Large Increment per Cycle */
+PERF_ARCH(LBR_SELECT,          0x02000) /* Save/Restore MSR_LBR_SELECT */
+PERF_ARCH(TOPDOWN,             0x04000) /* Count Topdown slots/metrics events */
+PERF_ARCH(PEBS_STLAT,          0x08000) /* st+stlat data address sampling */
+PERF_ARCH(AMD_BRS,             0x10000) /* AMD Branch Sampling */
+PERF_ARCH(PEBS_LAT_HYBRID,     0x20000) /* ld and st lat for hybrid */