perf pmu: Pass pmu as a parameter to get_cpuid_str()

The cpuid string will not be same on all CPUs on heterogeneous platforms
like ARM's big.LITTLE, adding provision(using pmu->cpus) to find cpuid
string from associated CPUs of PMU CORE device.

Also optimise arguments to function pmu_add_cpu_aliases.

Signed-off-by: Ganapatrao Kulkarni <[e-mail]>
Acked-by: Will Deacon <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Catalin Marinas <[e-mail]>
Cc: Jayachandran C <[e-mail]>
Cc: Jonathan Cameron <[e-mail]>
Cc: [e-mail]
Cc: Mark Rutland <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Robert Richter <[e-mail]>
Cc: Shaokun Zhang <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/arch/powerpc/util/header.c

···
 }
 
 char *
-get_cpuid_str(void)
+get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
 {
 	char *bufp;
 

tools/perf/arch/x86/util/header.c

···
 }
 
 char *
-get_cpuid_str(void)
+get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
 {
 	char *buf = malloc(128);
 

tools/perf/util/header.h

···
 #include <linux/types.h>
 #include "event.h"
 #include "env.h"
+#include "pmu.h"
 
 enum {
 	HEADER_RESERVED		= 0,	/* always cleared */
···
  */
 int get_cpuid(char *buffer, size_t sz);
 
-char *get_cpuid_str(void);
+char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused);
 #endif /* __PERF_HEADER_H */

tools/perf/util/metricgroup.c

···
 void metricgroup__print(bool metrics, bool metricgroups, char *filter,
 			bool raw)
 {
-	struct pmu_events_map *map = perf_pmu__find_map();
+	struct pmu_events_map *map = perf_pmu__find_map(NULL);
 	struct pmu_event *pe;
 	int i;
 	struct rblist groups;
···
 static int metricgroup__add_metric(const char *metric, struct strbuf *events,
 				   struct list_head *group_list)
 {
-	struct pmu_events_map *map = perf_pmu__find_map();
+	struct pmu_events_map *map = perf_pmu__find_map(NULL);
 	struct pmu_event *pe;
 	int ret = -EINVAL;
 	int i, j;

tools/perf/util/pmu.c

···
  * Each architecture should provide a more precise id string that
  * can be use to match the architecture's "mapfile".
  */
-char * __weak get_cpuid_str(void)
+char * __weak get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
 {
 	return NULL;
 }
 
-static char *perf_pmu__getcpuid(void)
+static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
 {
 	char *cpuid;
 	static bool printed;
···
 	if (cpuid)
 		cpuid = strdup(cpuid);
 	if (!cpuid)
-		cpuid = get_cpuid_str();
+		cpuid = get_cpuid_str(pmu);
 	if (!cpuid)
 		return NULL;
 
···
 	return cpuid;
 }
 
-struct pmu_events_map *perf_pmu__find_map(void)
+struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu)
 {
 	struct pmu_events_map *map;
-	char *cpuid = perf_pmu__getcpuid();
+	char *cpuid = perf_pmu__getcpuid(pmu);
 	int i;
 
 	i = 0;
···
  * to the current running CPU. Then, add all PMU events from that table
  * as aliases.
  */
-static void pmu_add_cpu_aliases(struct list_head *head, const char *name)
+static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
 {
 	int i;
 	struct pmu_events_map *map;
 	struct pmu_event *pe;
+	const char *name = pmu->name;
 
-	map = perf_pmu__find_map();
+	map = perf_pmu__find_map(pmu);
 	if (!map)
 		return;
 
···
 	if (pmu_aliases(name, &aliases))
 		return NULL;
 
-	pmu_add_cpu_aliases(&aliases, name);
 	pmu = zalloc(sizeof(*pmu));
 	if (!pmu)
 		return NULL;
 
 	pmu->cpus = pmu_cpumask(name);
-
+	pmu->name = strdup(name);
+	pmu->type = type;
 	pmu->is_uncore = pmu_is_uncore(name);
+	pmu_add_cpu_aliases(&aliases, pmu);
 
 	INIT_LIST_HEAD(&pmu->format);
 	INIT_LIST_HEAD(&pmu->aliases);
 	list_splice(&format, &pmu->format);
 	list_splice(&aliases, &pmu->aliases);
-	pmu->name = strdup(name);
-	pmu->type = type;
 	list_add_tail(&pmu->list, &pmus);
 
 	pmu->default_config = perf_pmu__get_default_config(pmu);

tools/perf/util/pmu.h

···
 
 struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu);
 
-struct pmu_events_map *perf_pmu__find_map(void);
+struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu);
 
 #endif /* __PMU_H */