linux-kernel - [PATCH] perf vendor events amd: Fix Zen 5 MAB allocation events

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Message-ID: <9a7eaa4f2e50a4ab2d98781c52bce6f98568a888.1769069215.git.sandipan.das@amd.com>
Date: Thu, 22 Jan 2026 13:39:46 +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>,
	James Clark <james.clark@...aro.org>, Suyash Mahar <smahar@...a.com>, "Ravi
 Bangoria" <ravi.bangoria@....com>, Ananth Narayan <ananth.narayan@....com>,
	Sandipan Das <sandipan.das@....com>
Subject: [PATCH] perf vendor events amd: Fix Zen 5 MAB allocation events

The unit masks for PMCx041 vary across different generations of Zen
processors. Fix the Zen 5 events based on PMCx041 as they incorrectly
use the same unit masks as that of Zen 4.

Fixes: 45c072f2537a ("perf vendor events amd: Add Zen 5 core events")
Reported-by: Suyash Mahar <smahar@...a.com>
Signed-off-by: Sandipan Das <sandipan.das@....com>
---
 tools/perf/pmu-events/arch/x86/amdzen5/load-store.json | 6 +++---
 1 file changed, 3 insertions(+), 3 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..06bbaea15925 100644
--- a/tools/perf/pmu-events/arch/x86/amdzen5/load-store.json
+++ b/tools/perf/pmu-events/arch/x86/amdzen5/load-store.json
@@ -70,19 +70,19 @@
     "EventName": "ls_mab_alloc.load_store_allocations",
     "EventCode": "0x41",
     "BriefDescription": "Miss Address Buffer (MAB) entries allocated by a Load-Store (LS) pipe for load-store allocations.",
-    "UMask": "0x3f"
+    "UMask": "0x07"
   },
   {
     "EventName": "ls_mab_alloc.hardware_prefetcher_allocations",
     "EventCode": "0x41",
     "BriefDescription": "Miss Address Buffer (MAB) entries allocated by a Load-Store (LS) pipe for hardware prefetcher allocations.",
-    "UMask": "0x40"
+    "UMask": "0x08"
   },
   {
     "EventName": "ls_mab_alloc.all_allocations",
     "EventCode": "0x41",
     "BriefDescription": "Miss Address Buffer (MAB) entries allocated by a Load-Store (LS) pipe for all types of allocations.",
-    "UMask": "0x7f"
+    "UMask": "0x0f"
   },
   {
     "EventName": "ls_dmnd_fills_from_sys.local_l2",
-- 
2.43.0