linux-kernel - [PATCH v3 1/3] perf vendor events amd: restrict model detection for zen1 based processors

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Date:   Fri, 28 Feb 2020 12:56:37 -0500
From:   Vijay Thakkar <vijaythakkar@...com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Vijay Thakkar <vijaythakkar@...com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Kim Phillips <kim.phillips@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Martin Liška <mliska@...e.cz>,
        Jon Grimm <jon.grimm@....com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org
Subject: [PATCH v3 1/3] perf vendor events amd: restrict model detection for zen1 based processors

This patch changes the previous blanket detection of AMD Family 17h
processors to be more specific to Zen1 core based products only by
replacing model detection regex pattern [[:xdigit:]]+ with
([12][0-9A-F]|[0-9A-F]), restricting to models 0 though 2f only.

This change is required to allow for the addition of separate PMU events
for Zen2 core based models in the following patches as those belong to family
17h but have different PMCs. Current PMU events directory has also been
renamed to "amdzen1" from "amdfam17h" to reflect this specificity.

Note that although this change does not break PMU counters for existing
zen1 based systems, it does disable the current set of counters for zen2
based systems. Counters for zen2 have been added in the following
patches in this patchset.

Signed-off-by: Vijay Thakkar <vijaythakkar@...com>

---
Changes in v2:
    - Change Zen1 model detection regex to include all models in range 0
    through 2F inclusive.
Changes in v3: none

 .../perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/branch.json | 0
 .../perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/cache.json  | 0
 tools/perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/core.json | 0
 .../arch/x86/{amdfam17h => amdzen1}/floating-point.json         | 0
 .../perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/memory.json | 0
 .../perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/other.json  | 0
 tools/perf/pmu-events/arch/x86/mapfile.csv                      | 2 +-
 7 files changed, 1 insertion(+), 1 deletion(-)
 rename tools/perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/branch.json (100%)
 rename tools/perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/cache.json (100%)
 rename tools/perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/core.json (100%)
 rename tools/perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/floating-point.json (100%)
 rename tools/perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/memory.json (100%)
 rename tools/perf/pmu-events/arch/x86/{amdfam17h => amdzen1}/other.json (100%)

diff --git a/tools/perf/pmu-events/arch/x86/amdfam17h/branch.json b/tools/perf/pmu-events/arch/x86/amdzen1/branch.json
similarity index 100%
rename from tools/perf/pmu-events/arch/x86/amdfam17h/branch.json
rename to tools/perf/pmu-events/arch/x86/amdzen1/branch.json
diff --git a/tools/perf/pmu-events/arch/x86/amdfam17h/cache.json b/tools/perf/pmu-events/arch/x86/amdzen1/cache.json
similarity index 100%
rename from tools/perf/pmu-events/arch/x86/amdfam17h/cache.json
rename to tools/perf/pmu-events/arch/x86/amdzen1/cache.json
diff --git a/tools/perf/pmu-events/arch/x86/amdfam17h/core.json b/tools/perf/pmu-events/arch/x86/amdzen1/core.json
similarity index 100%
rename from tools/perf/pmu-events/arch/x86/amdfam17h/core.json
rename to tools/perf/pmu-events/arch/x86/amdzen1/core.json
diff --git a/tools/perf/pmu-events/arch/x86/amdfam17h/floating-point.json b/tools/perf/pmu-events/arch/x86/amdzen1/floating-point.json
similarity index 100%
rename from tools/perf/pmu-events/arch/x86/amdfam17h/floating-point.json
rename to tools/perf/pmu-events/arch/x86/amdzen1/floating-point.json
diff --git a/tools/perf/pmu-events/arch/x86/amdfam17h/memory.json b/tools/perf/pmu-events/arch/x86/amdzen1/memory.json
similarity index 100%
rename from tools/perf/pmu-events/arch/x86/amdfam17h/memory.json
rename to tools/perf/pmu-events/arch/x86/amdzen1/memory.json
diff --git a/tools/perf/pmu-events/arch/x86/amdfam17h/other.json b/tools/perf/pmu-events/arch/x86/amdzen1/other.json
similarity index 100%
rename from tools/perf/pmu-events/arch/x86/amdfam17h/other.json
rename to tools/perf/pmu-events/arch/x86/amdzen1/other.json
diff --git a/tools/perf/pmu-events/arch/x86/mapfile.csv b/tools/perf/pmu-events/arch/x86/mapfile.csv
index 745ced083844..82a9db00125e 100644
--- a/tools/perf/pmu-events/arch/x86/mapfile.csv
+++ b/tools/perf/pmu-events/arch/x86/mapfile.csv
@@ -36,4 +36,4 @@ GenuineIntel-6-55-[56789ABCDEF],v1,cascadelakex,core
 GenuineIntel-6-7D,v1,icelake,core
 GenuineIntel-6-7E,v1,icelake,core
 GenuineIntel-6-86,v1,tremontx,core
-AuthenticAMD-23-[[:xdigit:]]+,v1,amdfam17h,core
+AuthenticAMD-23-([12][0-9A-F]|[0-9A-F]),v1,amdzen1,core
-- 
2.25.1