linux-kernel - [PATCH 1/2] perf vendor events arm64: AmpereOne/AmpereOneX: Mark LD

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Message-ID: <20250313201559.11332-2-ilkka@os.amperecomputing.com>
Date: Thu, 13 Mar 2025 20:15:58 +0000
From: Ilkka Koskinen <ilkka@...amperecomputing.com>
To: Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	John Garry <john.g.garry@...cle.com>,
	Will Deacon <will@...nel.org>,
	James Clark <james.clark@...aro.org>,
	Mike Leach <mike.leach@...aro.org>,
	Leo Yan <leo.yan@...ux.dev>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Mark Rutland <mark.rutland@....com>
Cc: Ilkka Koskinen <ilkka@...amperecomputing.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] perf vendor events arm64: AmpereOne/AmpereOneX: Mark LD_RETIRED impacted by errata

Atomic instructions are both memory-reading and memory-writing
instructions and so should be counted by both LD_RETIRED and ST_RETIRED
performance monitoring events. However LD_RETIRED does not count atomic
instructions.

Signed-off-by: Ilkka Koskinen <ilkka@...amperecomputing.com>
---
 tools/perf/pmu-events/arch/arm64/ampere/ampereone/memory.json | 4 +++-
 .../perf/pmu-events/arch/arm64/ampere/ampereonex/memory.json  | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/pmu-events/arch/arm64/ampere/ampereone/memory.json b/tools/perf/pmu-events/arch/arm64/ampere/ampereone/memory.json
index 0711782bfa6b..13382d29b25f 100644
--- a/tools/perf/pmu-events/arch/arm64/ampere/ampereone/memory.json
+++ b/tools/perf/pmu-events/arch/arm64/ampere/ampereone/memory.json
@@ -1,6 +1,8 @@
 [
     {
-        "ArchStdEvent": "LD_RETIRED"
+        "ArchStdEvent": "LD_RETIRED",
+        "Errata": "Errata AC03_CPU_52",
+        "BriefDescription": "Instruction architecturally executed, condition code check pass, load. Impacted by errata -"
     },
     {
         "ArchStdEvent": "MEM_ACCESS_RD"
diff --git a/tools/perf/pmu-events/arch/arm64/ampere/ampereonex/memory.json b/tools/perf/pmu-events/arch/arm64/ampere/ampereonex/memory.json
index a211d94aacde..6c06bc928415 100644
--- a/tools/perf/pmu-events/arch/arm64/ampere/ampereonex/memory.json
+++ b/tools/perf/pmu-events/arch/arm64/ampere/ampereonex/memory.json
@@ -1,6 +1,8 @@
 [
     {
-        "ArchStdEvent": "LD_RETIRED"
+        "ArchStdEvent": "LD_RETIRED",
+        "Errata": "Errata AC04_CPU_21",
+        "BriefDescription": "Instruction architecturally executed, condition code check pass, load. Impacted by errata -"
     },
     {
         "ArchStdEvent": "MEM_ACCESS_RD"
-- 
2.47.0