linux-kernel - [PATCH V3 1/4] perf/core: Expand PERF_EVENT_FLAG

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Date:   Wed,  7 Sep 2022 14:49:21 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, peterz@...radead.org
Cc:     Anshuman Khandual <anshuman.khandual@....com>,
        James Clark <james.clark@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>, x86@...nel.org
Subject: [PATCH V3 1/4] perf/core: Expand PERF_EVENT_FLAG_ARCH

Two hardware event flags on x86 platform has overshot PERF_EVENT_FLAG_ARCH
(0x0000ffff). These flags are PERF_X86_EVENT_PEBS_LAT_HYBRID (0x20000) and
PERF_X86_EVENT_AMD_BRS (0x10000). Lets expand PERF_EVENT_FLAG_ARCH mask to
accommodate those flags, and also create room for two more in the future.

Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: linux-perf-users@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Reviewed-by: James Clark <james.clark@....com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
 include/linux/perf_event.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index ee8b9ecdc03b..3f51fbf4a595 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -137,7 +137,7 @@ struct hw_perf_event_extra {
  * PERF_EVENT_FLAG_ARCH bits are reserved for architecture-specific
  * usage.
  */
-#define PERF_EVENT_FLAG_ARCH			0x0000ffff
+#define PERF_EVENT_FLAG_ARCH			0x000fffff
 #define PERF_EVENT_FLAG_USER_READ_CNT		0x80000000
 
 /**
-- 
2.25.1