perf kwork: Set default events list if not specified in setup_event_list()

Currently when no kwork event is specified, all events are configured by
default. Now set to default event list string, which is more flexible and
supports subsequent function extension.

Also put setup_event_list() into each subcommand for different settings.
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-7-yangjihong1@huawei.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-kwork.c

@@ -1623,8 +1623,11 @@ static void setup_event_list(struct perf_kwork *kwork,
 	struct kwork_class *class;
 	char *tmp, *tok, *str;
 
+	/*
+	 * set default events list if not specified
+	 */
 	if (kwork->event_list_str == NULL)
-		goto null_event_list_str;
+		kwork->event_list_str = "irq, softirq, workqueue";
 
 	str = strdup(kwork->event_list_str);
 	for (tok = strtok_r(str, ", ", &tmp);
@@ -1643,17 +1646,6 @@ static void setup_event_list(struct perf_kwork *kwork,
 	}
 	free(str);
 
-null_event_list_str:
-	/*
-	 * config all kwork events if not specified
-	 */
-	if (list_empty(&kwork->class_list)) {
-		for (i = 0; i < KWORK_CLASS_MAX; i++) {
-			list_add_tail(&kwork_class_supported_list[i]->list,
-				      &kwork->class_list);
-		}
-	}
-
 	pr_debug("Config event list:");
 	list_for_each_entry(class, &kwork->class_list, list)
 		pr_debug(" %s", class->name);
@@ -1835,12 +1827,12 @@ int cmd_kwork(int argc, const char **argv)
 	if (!argc)
 		usage_with_options(kwork_usage, kwork_options);
 
-	setup_event_list(&kwork, kwork_options, kwork_usage);
 	sort_dimension__add(&kwork, "id", &kwork.cmp_id);
 
-	if (strlen(argv[0]) > 2 && strstarts("record", argv[0]))
+	if (strlen(argv[0]) > 2 && strstarts("record", argv[0])) {
+		setup_event_list(&kwork, kwork_options, kwork_usage);
 		return perf_kwork__record(&kwork, argc, argv);
-	else if (strlen(argv[0]) > 2 && strstarts("report", argv[0])) {
+	} else if (strlen(argv[0]) > 2 && strstarts("report", argv[0])) {
 		kwork.sort_order = default_report_sort_order;
 		if (argc > 1) {
 			argc = parse_options(argc, argv, report_options, report_usage, 0);
@@ -1849,6 +1841,7 @@ int cmd_kwork(int argc, const char **argv)
 		}
 		kwork.report = KWORK_REPORT_RUNTIME;
 		setup_sorting(&kwork, report_options, report_usage);
+		setup_event_list(&kwork, kwork_options, kwork_usage);
 		return perf_kwork__report(&kwork);
 	} else if (strlen(argv[0]) > 2 && strstarts("latency", argv[0])) {
 		kwork.sort_order = default_latency_sort_order;
@@ -1859,6 +1852,7 @@ int cmd_kwork(int argc, const char **argv)
 		}
 		kwork.report = KWORK_REPORT_LATENCY;
 		setup_sorting(&kwork, latency_options, latency_usage);
+		setup_event_list(&kwork, kwork_options, kwork_usage);
 		return perf_kwork__report(&kwork);
 	} else if (strlen(argv[0]) > 2 && strstarts("timehist", argv[0])) {
 		if (argc > 1) {
@@ -1867,6 +1861,7 @@ int cmd_kwork(int argc, const char **argv)
 				usage_with_options(timehist_usage, timehist_options);
 		}
 		kwork.report = KWORK_REPORT_TIMEHIST;
+		setup_event_list(&kwork, kwork_options, kwork_usage);
 		return perf_kwork__timehist(&kwork);
 	} else
 		usage_with_options(kwork_usage, kwork_options);