perf env: Add perf_env__cpuid, perf_env__{nr_}pmu_mappings

[linux-2.6-microblaze.git] / tools / perf / util / env.c

diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 8f7ff00..cf773f0 100644 (file)
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -10,6 +10,7 @@
 #include <sys/utsname.h>
 #include <stdlib.h>
 #include <string.h>
+#include "strbuf.h"
 
 struct perf_env perf_env;
 
@@ -306,6 +307,45 @@ int perf_env__read_cpu_topology_map(struct perf_env *env)
        return 0;
 }
 
+int perf_env__read_pmu_mappings(struct perf_env *env)
+{
+       struct perf_pmu *pmu = NULL;
+       u32 pmu_num = 0;
+       struct strbuf sb;
+
+       while ((pmu = perf_pmu__scan(pmu))) {
+               if (!pmu->name)
+                       continue;
+               pmu_num++;
+       }
+       if (!pmu_num) {
+               pr_debug("pmu mappings not available\n");
+               return -ENOENT;
+       }
+       env->nr_pmu_mappings = pmu_num;
+
+       if (strbuf_init(&sb, 128 * pmu_num) < 0)
+               return -ENOMEM;
+
+       while ((pmu = perf_pmu__scan(pmu))) {
+               if (!pmu->name)
+                       continue;
+               if (strbuf_addf(&sb, "%u:%s", pmu->type, pmu->name) < 0)
+                       goto error;
+               /* include a NULL character at the end */
+               if (strbuf_add(&sb, "", 1) < 0)
+                       goto error;
+       }
+
+       env->pmu_mappings = strbuf_detach(&sb, NULL);
+
+       return 0;
+
+error:
+       strbuf_release(&sb);
+       return -1;
+}
+
 int perf_env__read_cpuid(struct perf_env *env)
 {
        char cpuid[128];
@@ -404,6 +444,44 @@ const char *perf_env__arch(struct perf_env *env)
        return normalize_arch(arch_name);
 }
 
+const char *perf_env__cpuid(struct perf_env *env)
+{
+       int status;
+
+       if (!env || !env->cpuid) { /* Assume local operation */
+               status = perf_env__read_cpuid(env);
+               if (status)
+                       return NULL;
+       }
+
+       return env->cpuid;
+}
+
+int perf_env__nr_pmu_mappings(struct perf_env *env)
+{
+       int status;
+
+       if (!env || !env->nr_pmu_mappings) { /* Assume local operation */
+               status = perf_env__read_pmu_mappings(env);
+               if (status)
+                       return 0;
+       }
+
+       return env->nr_pmu_mappings;
+}
+
+const char *perf_env__pmu_mappings(struct perf_env *env)
+{
+       int status;
+
+       if (!env || !env->pmu_mappings) { /* Assume local operation */
+               status = perf_env__read_pmu_mappings(env);
+               if (status)
+                       return NULL;
+       }
+
+       return env->pmu_mappings;
+}
 
 int perf_env__numa_node(struct perf_env *env, int cpu)
 {