linux-kernel - [PATCH v5 2/5] perf jevents: Support more event fields

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Message-Id: <1690525040-77423-3-git-send-email-renyu.zj@linux.alibaba.com>
Date:   Fri, 28 Jul 2023 14:17:17 +0800
From:   Jing Zhang <renyu.zj@...ux.alibaba.com>
To:     John Garry <john.g.garry@...cle.com>,
        Ian Rogers <irogers@...gle.com>
Cc:     Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>,
        Robin Murphy <robin.murphy@....com>,
        Ilkka Koskinen <ilkka@...amperecomputing.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org, linux-doc@...r.kernel.org,
        Zhuo Song <zhuo.song@...ux.alibaba.com>,
        Jing Zhang <renyu.zj@...ux.alibaba.com>,
        Shuai Xue <xueshuai@...ux.alibaba.com>
Subject: [PATCH v5 2/5] perf jevents: Support more event fields

The usual event descriptions are "event=xxx" or "config=xxx", while the
event descriptions of CMN are "type=xxx, eventid=xxx" or more complex.

$cat /sys/bus/event_source/devices/arm_cmn_0/events/hnf_cache_fill
type=0x5,eventid=0x3

When adding aliases for events described as "event=xxx" or "config=xxx",
EventCode or ConfigCode can be used in the JSON files to describe the
events. But "eventid=xxx, type=xxx" cannot be supported at present.

If EventCode and ConfigCode is not added in the alias JSON file, the
event description will add "event=0" by default. So, even if the event
field is added to supplement "eventid=xxx" and "type=xxx", the final
parsing result will be "event=0, eventid=xxx, type=xxx".

Therefore, when EventCode and ConfigCode are missing in JSON, "event=0" is
no longer added by default. EventIdCode and Type are added to the event
field, and ConfigCode is moved into the event_field array which can also
guarantee its original function.

Signed-off-by: Jing Zhang <renyu.zj@...ux.alibaba.com>
---
 tools/perf/pmu-events/jevents.py | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index f57a8f2..9c0f63a 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -275,12 +275,6 @@ class JsonEvent:
       }
       return table[unit] if unit in table else f'uncore_{unit.lower()}'
 
-    eventcode = 0
-    if 'EventCode' in jd:
-      eventcode = int(jd['EventCode'].split(',', 1)[0], 0)
-    if 'ExtSel' in jd:
-      eventcode |= int(jd['ExtSel']) << 8
-    configcode = int(jd['ConfigCode'], 0) if 'ConfigCode' in jd else None
     self.name = jd['EventName'].lower() if 'EventName' in jd else None
     self.topic = ''
     self.compat = jd.get('Compat')
@@ -317,7 +311,15 @@ class JsonEvent:
     if precise and self.desc and '(Precise Event)' not in self.desc:
       extra_desc += ' (Must be precise)' if precise == '2' else (' (Precise '
                                                                  'event)')
-    event = f'config={llx(configcode)}' if configcode is not None else f'event={llx(eventcode)}'
+    eventcode = None
+    if 'EventCode' in jd:
+      eventcode = int(jd['EventCode'].split(',', 1)[0], 0)
+    if 'ExtSel' in jd:
+      if eventcode is None:
+        eventcode = int(jd['ExtSel']) << 8
+      else:
+        eventcode |= int(jd['ExtSel']) << 8
+    event = f'event={llx(eventcode)}' if eventcode is not None else None
     event_fields = [
         ('AnyThread', 'any='),
         ('PortMask', 'ch_mask='),
@@ -327,10 +329,13 @@ class JsonEvent:
         ('Invert', 'inv='),
         ('SampleAfterValue', 'period='),
         ('UMask', 'umask='),
+        ('ConfigCode', 'config='),
+        ('Type', 'type='),
+        ('EventIdCode', 'eventid='),
     ]
     for key, value in event_fields:
       if key in jd and jd[key] != '0':
-        event += ',' + value + jd[key]
+        event = event + ',' + value + jd[key] if event is not None else value + jd[key]
     if filter:
       event += f',{filter}'
     if msr:
-- 
1.8.3.1