[PATCH 1/2] perf vendor events arm64: AmpereOne/AmpereOneX: Mark LD_RETIRED impacted by errata

Ilkka Koskinen
2025-03-13T20:12:47Z

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@os.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