perf pmu: To info add event_type_desc

All PMU events are assumed to be "Kernel PMU event", however, this
isn't true for fake PMUs and won't be true with the addition of more
software PMUs. Make the PMU's type description name configurable -
largely for printing callbacks.

Signed-off-by: Ian Rogers <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Cc: Ravi Bangoria <[e-mail]>
Cc: Sandipan Das <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Yang Jihong <[e-mail]>
Cc: Dominique Martinet <[e-mail]>
Cc: Clément Le Goffic <[e-mail]>
Cc: Colin Ian King <[e-mail]>
Cc: Howard Chu <[e-mail]>
Cc: Ze Gao <[e-mail]>
Cc: Yicong Yang <[e-mail]>
Cc: Changbin Du <[e-mail]>
Cc: Junhao He <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Weilin Wang <[e-mail]>
Cc: Arnaldo Carvalho de Melo <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Will Deacon <[e-mail]>
Cc: James Clark <[e-mail]>
Cc: Mike Leach <[e-mail]>
Cc: Jing Zhang <[e-mail]>
Cc: Leo Yan <[e-mail]>
Cc: Oliver Upton <[e-mail]>
Cc: Benjamin Gray <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Athira Jajeev <[e-mail]>
Cc: [e-mail]
Cc: Sun Haiyong <[e-mail]>
Cc: Tiezhu Yang <[e-mail]>
Cc: Xu Yang <[e-mail]>
Cc: John Garry <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Veronika Molnarova <[e-mail]>
Cc: Dr. David Alan Gilbert <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/util/pmu.c

···
 	struct perf_pmu_alias *event;
 	struct pmu_event_info info = {
 		.pmu = pmu,
+		.event_type_desc = "Kernel PMU event",
 	};
 	int ret = 0;
 	struct strbuf sb;

tools/perf/util/pmu.h

···
 	const char *encoding_desc;
 	const char *topic;
 	const char *pmu_name;
+	const char *event_type_desc;
 	const char *str;
 	bool deprecated;
 };

tools/perf/util/pmus.c

···
 	const char *encoding_desc;
 	const char *topic;
 	const char *pmu_name;
+	const char *event_type_desc;
 	bool deprecated;
 };
 
···
 	COPY_STR(encoding_desc);
 	COPY_STR(topic);
 	COPY_STR(pmu_name);
+	COPY_STR(event_type_desc);
 #undef COPY_STR
 	s->deprecated = info->deprecated;
 	state->index++;
···
 				aliases[j].alias,
 				aliases[j].scale_unit,
 				aliases[j].deprecated,
-				"Kernel PMU event",
+				aliases[j].event_type_desc,
 				aliases[j].desc,
 				aliases[j].long_desc,
 				aliases[j].encoding_desc);
···
 		zfree(&aliases[j].encoding_desc);
 		zfree(&aliases[j].topic);
 		zfree(&aliases[j].pmu_name);
+		zfree(&aliases[j].event_type_desc);
 	}
 	if (printed && pager_in_use())
 		printf("\n");