linux-kernel - [PATCH v2 02/15] perf parse-events: Minor tidy up of event

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Message-ID: <20250611160206.552030-3-irogers@google.com>
Date: Wed, 11 Jun 2025 09:01:53 -0700
From: Ian Rogers <irogers@...gle.com>
To: 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>, James Clark <james.clark@...aro.org>, 
	Xu Yang <xu.yang_2@....com>, John Garry <john.g.garry@...cle.com>, 
	"Masami Hiramatsu (Google)" <mhiramat@...nel.org>, Howard Chu <howardchu95@...il.com>, 
	Weilin Wang <weilin.wang@...el.com>, Thomas Richter <tmricht@...ux.ibm.com>, 
	Andi Kleen <ak@...ux.intel.com>, Tiezhu Yang <yangtiezhu@...ngson.cn>, 
	Gautam Menghani <gautam@...ux.ibm.com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org
Subject: [PATCH v2 02/15] perf parse-events: Minor tidy up of event_type helper

Add missing breakpoint and raw types. Avoid a switch, just use a
lookup array. Switch the type to unsigned to avoid checking negative
values.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/parse-events.c | 31 +++++++++++++------------------
 tools/perf/util/parse-events.h |  2 +-
 2 files changed, 14 insertions(+), 19 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 7f34e602fc08..9dd0216cfae4 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -135,26 +135,21 @@ const struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 	},
 };
 
-const char *event_type(int type)
-{
-	switch (type) {
-	case PERF_TYPE_HARDWARE:
-		return "hardware";
-
-	case PERF_TYPE_SOFTWARE:
-		return "software";
-
-	case PERF_TYPE_TRACEPOINT:
-		return "tracepoint";
-
-	case PERF_TYPE_HW_CACHE:
-		return "hardware-cache";
+static const char *const event_types[] = {
+	[PERF_TYPE_HARDWARE]	= "hardware",
+	[PERF_TYPE_SOFTWARE]	= "software",
+	[PERF_TYPE_TRACEPOINT]	= "tracepoint",
+	[PERF_TYPE_HW_CACHE]	= "hardware-cache",
+	[PERF_TYPE_RAW]		= "raw",
+	[PERF_TYPE_BREAKPOINT]	= "breakpoint",
+};
 
-	default:
-		break;
-	}
+const char *event_type(size_t type)
+{
+	if (type >= PERF_TYPE_MAX)
+		return "unknown";
 
-	return "unknown";
+	return event_types[type];
 }
 
 static char *get_config_str(const struct parse_events_terms *head_terms,
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 1c20ed0879aa..b47bf2810112 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -21,7 +21,7 @@ struct option;
 struct perf_pmu;
 struct strbuf;
 
-const char *event_type(int type);
+const char *event_type(size_t type);
 
 /* Arguments encoded in opt->value. */
 struct parse_events_option_args {
-- 
2.50.0.rc0.642.g800a2b2222-goog