perf parse-events: Pass cpu_list as a perf_cpu_map in __add_event()

Previously the cpu_list is a string and typically no cpu_list is
passed to __add_event().

Wanting to make events have their cpus distinct from the PMU means that
in more occassions we want to pass a cpu_list.

If we're reading this from sysfs it is easier to read a perf_cpu_map
than allocate and pass around strings that will later be parsed.

Signed-off-by: Ian Rogers <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ananth Narayan <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Dhananjay Ugwekar <[email protected]>
Cc: Dominique Martinet <[email protected]>
Cc: Gautham Shenoy <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: K Prateek Nayak <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ravi Bangoria <[email protected]>
Cc: Sandipan Das <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: captain5050

tools/perf/util/parse-events.c

@@ -227,12 +227,12 @@ __add_event(struct list_head *list, int *idx,
 	    bool init_attr,
 	    const char *name, const char *metric_id, struct perf_pmu *pmu,
 	    struct list_head *config_terms, bool auto_merge_stats,
-	    const char *cpu_list)
+	    struct perf_cpu_map *cpu_list)
 {
 	struct evsel *evsel;
-	struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) :
-			       cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
+	struct perf_cpu_map *cpus = perf_cpu_map__is_empty(cpu_list) && pmu ? pmu->cpus : cpu_list;
 
+	cpus = perf_cpu_map__get(cpus);
 	if (pmu)
 		perf_pmu__warn_invalid_formats(pmu);
 
@@ -305,16 +305,17 @@ static int add_event_tool(struct list_head *list, int *idx,
 		.type = PERF_TYPE_SOFTWARE,
 		.config = PERF_COUNT_SW_DUMMY,
 	};
-	const char *cpu_list = NULL;
+	struct perf_cpu_map *cpu_list = NULL;
 
 	if (tool_event == PERF_TOOL_DURATION_TIME) {
 		/* Duration time is gathered globally, pretend it is only on CPU0. */
-		cpu_list = "0";
+		cpu_list = perf_cpu_map__new("0");
 	}
 	evsel = __add_event(list, idx, &attr, /*init_attr=*/true, /*name=*/NULL,
 			    /*metric_id=*/NULL, /*pmu=*/NULL,
 			    /*config_terms=*/NULL, /*auto_merge_stats=*/false,
 			    cpu_list);
+	perf_cpu_map__put(cpu_list);
 	if (!evsel)
 		return -ENOMEM;
 	evsel->tool_event = tool_event;