1 files changed, 90 insertions, 0 deletions

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 57e4ce57bbcc..91d19138f3ec 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -15,6 +15,7 @@
 #include "cpumap.h"
 #include "thread_map.h"
 #include "target.h"
+#include "../../include/linux/perf_event.h"
 
 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 #define GROUP_FD(group_fd, cpu) (*(int *)xyarray__entry(group_fd, cpu, 0))
@@ -64,6 +65,95 @@ struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
         return evsel;
 }
 
+static const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
+        "cycles",
+        "instructions",
+        "cache-references",
+        "cache-misses",
+        "branches",
+        "branch-misses",
+        "bus-cycles",
+        "stalled-cycles-frontend",
+        "stalled-cycles-backend",
+        "ref-cycles",
+};
+
+const char *__perf_evsel__hw_name(u64 config)
+{
+        if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
+                return perf_evsel__hw_names[config];
+
+        return "unknown-hardware";
+}
+
+static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
+{
+        int colon = 0;
+        struct perf_event_attr *attr = &evsel->attr;
+        int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(attr->config));
+        bool exclude_guest_default = false;
+
+#define MOD_PRINT(context, mod) do {                                    \
+                if (!attr->exclude_##context) {                         \
+                        if (!colon) colon = r++;                        \
+                        r += scnprintf(bf + r, size - r, "%c", mod);    \
+                } } while(0)
+
+        if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
+                MOD_PRINT(kernel, 'k');
+                MOD_PRINT(user, 'u');
+                MOD_PRINT(hv, 'h');
+                exclude_guest_default = true;
+        }
+
+        if (attr->precise_ip) {
+                if (!colon)
+                        colon = r++;
+                r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
+                exclude_guest_default = true;
+        }
+
+        if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
+                MOD_PRINT(host, 'H');
+                MOD_PRINT(guest, 'G');
+        }
+#undef MOD_PRINT
+        if (colon)
+                bf[colon] = ':';
+        return r;
+}
+
+int perf_evsel__name(struct perf_evsel *evsel, char *bf, size_t size)
+{
+        int ret;
+
+        switch (evsel->attr.type) {
+        case PERF_TYPE_RAW:
+                ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
+                break;
+
+        case PERF_TYPE_HARDWARE:
+                ret = perf_evsel__hw_name(evsel, bf, size);
+                break;
+        default:
+                /*
+                 * FIXME
+                 *
+                 * This is the minimal perf_evsel__name so that we can
+                 * reconstruct event names taking into account event modifiers.
+                 *
+                 * The old event_name uses it now for raw anr hw events, so that
+                 * we don't drag all the parsing stuff into the python binding.
+                 *
+                 * On the next devel cycle the rest of the event naming will be
+                 * brought here.
+                 */
+                return 0;
+        }
+
+        return ret;
+}
+
 void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts,
                         struct perf_evsel *first)
 {