linux-kernel - [PATCH 3/3] perf vendor events amd: Remove Zen 5 IBS fetch event

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Message-ID: <826b1fc26b97eb040c784bbf43f9ad666b7822b1.1746627307.git.sandipan.das@amd.com>
Date: Wed, 7 May 2025 19:58:29 +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 3/3] perf vendor events amd: Remove Zen 5 IBS fetch event

As mentioned in Erratum 1544 from the Revision Guide for AMD Family 1Ah
Models 00h-0Fh Processors available at the link below, PMCx188 reports
incorrect information about valid IBS fetch samples when used with unit
mask 0x10 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/inst-cache.json | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/tools/perf/pmu-events/arch/x86/amdzen5/inst-cache.json b/tools/perf/pmu-events/arch/x86/amdzen5/inst-cache.json
index 4fd5e2c5432f..3b61cf8a04da 100644
--- a/tools/perf/pmu-events/arch/x86/amdzen5/inst-cache.json
+++ b/tools/perf/pmu-events/arch/x86/amdzen5/inst-cache.json
@@ -27,12 +27,6 @@
     "BriefDescription": "Fetches discarded after being tagged by Fetch IBS due to IBS filtering.",
     "UMask": "0x08"
   },
-  {
-    "EventName": "ic_fetch_ibs_events.sample_valid",
-    "EventCode": "0x188",
-    "BriefDescription": "Fetches tagged by Fetch IBS that result in a valid sample and an IBS interrupt.",
-    "UMask": "0x10"
-  },
   {
     "EventName": "op_cache_hit_miss.op_cache_hit",
     "EventCode": "0x28f",
-- 
2.43.0