Merge remote-tracking branch 'torvalds/master' into perf/core

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

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 88da5cf..4e52b94 100644 (file)
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1812,3 +1812,36 @@ int perf_pmu__caps_parse(struct perf_pmu *pmu)
 
        return nr_caps;
 }
+
+void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config,
+                                  char *name)
+{
+       struct perf_pmu_format *format;
+       __u64 masks = 0, bits;
+       char buf[100];
+       unsigned int i;
+
+       list_for_each_entry(format, &pmu->format, list) {
+               if (format->value != PERF_PMU_FORMAT_VALUE_CONFIG)
+                       continue;
+
+               for_each_set_bit(i, format->bits, PERF_PMU_FORMAT_BITS)
+                       masks |= 1ULL << i;
+       }
+
+       /*
+        * Kernel doesn't export any valid format bits.
+        */
+       if (masks == 0)
+               return;
+
+       bits = config & ~masks;
+       if (bits == 0)
+               return;
+
+       bitmap_scnprintf((unsigned long *)&bits, sizeof(bits) * 8, buf, sizeof(buf));
+
+       pr_warning("WARNING: event '%s' not valid (bits %s of config "
+                  "'%llx' not supported by kernel)!\n",
+                  name ?: "N/A", buf, config);
+}