linux-kernel - [PATCH 2/4] perf vendor events arm64: AmpereOne: Mark affected STALL

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Message-Id: <20230803211331.140553-3-ilkka@os.amperecomputing.com>
Date:   Thu,  3 Aug 2023 14:13:29 -0700
From:   Ilkka Koskinen <ilkka@...amperecomputing.com>
To:     John Garry <john.g.garry@...cle.com>,
        Ian Rogers <irogers@...gle.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Will Deacon <will@...nel.org>, James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ilkka Koskinen <ilkka@...amperecomputing.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org,
        Dave Kleikamp <dave.kleikamp@...cle.com>
Subject: [PATCH 2/4] perf vendor events arm64: AmpereOne: Mark affected STALL_* events impacted by errata

Per errata AC03_CPU_29, STALL_SLOT_FRONTEND, STALL_FRONTEND, and STALL
events are not counting as expected. The follow up metrics patch will
include correct way to calculate the impacted events.

Signed-off-by: Ilkka Koskinen <ilkka@...amperecomputing.com>
---
 .../arch/arm64/ampere/ampereone/pipeline.json        | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/tools/perf/pmu-events/arch/arm64/ampere/ampereone/pipeline.json b/tools/perf/pmu-events/arch/arm64/ampere/ampereone/pipeline.json
index f9fae15f7555..711028377f3e 100644
--- a/tools/perf/pmu-events/arch/arm64/ampere/ampereone/pipeline.json
+++ b/tools/perf/pmu-events/arch/arm64/ampere/ampereone/pipeline.json
@@ -1,18 +1,24 @@
 [
     {
-        "ArchStdEvent": "STALL_FRONTEND"
+        "ArchStdEvent": "STALL_FRONTEND",
+        "Errata": "Errata AC03_CPU_29",
+        "BriefDescription": "Impacted by errata, use metrics instead -"
     },
     {
         "ArchStdEvent": "STALL_BACKEND"
     },
     {
-        "ArchStdEvent": "STALL"
+        "ArchStdEvent": "STALL",
+        "Errata": "Errata AC03_CPU_29",
+        "BriefDescription": "Impacted by errata, use metrics instead -"
     },
     {
         "ArchStdEvent": "STALL_SLOT_BACKEND"
     },
     {
-        "ArchStdEvent": "STALL_SLOT_FRONTEND"
+        "ArchStdEvent": "STALL_SLOT_FRONTEND",
+        "Errata": "Errata AC03_CPU_29",
+        "BriefDescription": "Impacted by errata, use metrics instead -"
     },
     {
         "ArchStdEvent": "STALL_SLOT"
-- 
2.40.1