linux-kernel - [PATCH 2/3] perf vendor events amd: Remove Zen 5 TLB flush event

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Message-ID: <a37abb53e540f3375706a6d6877323ba950ee6e3.1746627307.git.sandipan.das@amd.com>
Date: Wed, 7 May 2025 19:58:28 +0530
From: Sandipan Das <sandipan.das@....com>
To: <linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim
	<namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, "Alexander
 Shishkin" <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
	"Kan Liang" <kan.liang@...ux.intel.com>, Stephane Eranian
	<eranian@...gle.com>, Ravi Bangoria <ravi.bangoria@....com>, Ananth Narayan
	<ananth.narayan@....com>, Sandipan Das <sandipan.das@....com>,
	<stable@...r.kernel.org>
Subject: [PATCH 2/3] perf vendor events amd: Remove Zen 5 TLB flush event

As mentioned in Erratum 1569 from the Revision Guide for AMD Family 1Ah
Models 00h-0Fh Processors available at the link below, PMCx078 reports
incorrect information about TLB flushes on Zen 5 processors. Remove
affected events and metrics.

Link: https://bugzilla.kernel.org/attachment.cgi?id=308095
Fixes: 45c072f2537a ("perf vendor events amd: Add Zen 5 core events")
Signed-off-by: Sandipan Das <sandipan.das@....com>
Cc: stable@...r.kernel.org
---
 tools/perf/pmu-events/arch/x86/amdzen5/load-store.json  | 6 ------
 tools/perf/pmu-events/arch/x86/amdzen5/recommended.json | 7 -------
 2 files changed, 13 deletions(-)

diff --git a/tools/perf/pmu-events/arch/x86/amdzen5/load-store.json b/tools/perf/pmu-events/arch/x86/amdzen5/load-store.json
index ff6627a77805..f23a92bf55ac 100644
--- a/tools/perf/pmu-events/arch/x86/amdzen5/load-store.json
+++ b/tools/perf/pmu-events/arch/x86/amdzen5/load-store.json
@@ -502,12 +502,6 @@
     "EventCode": "0x76",
     "BriefDescription": "Core cycles not in halt."
   },
-  {
-    "EventName": "ls_tlb_flush.all",
-    "EventCode": "0x78",
-    "BriefDescription": "All TLB Flushes.",
-    "UMask": "0xff"
-  },
   {
     "EventName": "ls_not_halted_p0_cyc.p0_freq_cyc",
     "EventCode": "0x120",
diff --git a/tools/perf/pmu-events/arch/x86/amdzen5/recommended.json b/tools/perf/pmu-events/arch/x86/amdzen5/recommended.json
index 863f4b5dfc14..6b32308b1c3a 100644
--- a/tools/perf/pmu-events/arch/x86/amdzen5/recommended.json
+++ b/tools/perf/pmu-events/arch/x86/amdzen5/recommended.json
@@ -241,13 +241,6 @@
     "MetricGroup": "tlb",
     "ScaleUnit": "1e3per_1k_instr"
   },
-  {
-    "MetricName": "all_tlbs_flushed_pti",
-    "BriefDescription": "All TLBs flushed per thousand instructions.",
-    "MetricExpr": "ls_tlb_flush.all / instructions",
-    "MetricGroup": "tlb",
-    "ScaleUnit": "1e3per_1k_instr"
-  },
   {
     "MetricName": "macro_ops_dispatched",
     "BriefDescription": "Macro-ops dispatched.",
-- 
2.43.0