diff options
Diffstat (limited to 'tools/perf/util/print-events.c')
| -rw-r--r-- | tools/perf/util/print-events.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/tools/perf/util/print-events.c b/tools/perf/util/print-events.c index d148842b205a..69492cbd6921 100644 --- a/tools/perf/util/print-events.c +++ b/tools/perf/util/print-events.c @@ -27,6 +27,7 @@ #include "tracepoint.h" #include "pfm.h" #include "pmu-hybrid.h" +#include "thread_map.h" #define MAX_NAME_LEN 100 @@ -228,6 +229,44 @@ void print_sdt_events(const struct print_callbacks *print_cb, void *print_state) strlist__delete(sdtlist); } +static bool is_event_supported(u8 type, u64 config) +{ + bool ret = true; + int open_return; + struct evsel *evsel; + struct perf_event_attr attr = { + .type = type, + .config = config, + .disabled = 1, + }; + struct perf_thread_map *tmap = thread_map__new_by_tid(0); + + if (tmap == NULL) + return false; + + evsel = evsel__new(&attr); + if (evsel) { + open_return = evsel__open(evsel, NULL, tmap); + ret = open_return >= 0; + + if (open_return == -EACCES) { + /* + * This happens if the paranoid value + * /proc/sys/kernel/perf_event_paranoid is set to 2 + * Re-run with exclude_kernel set; we don't do that + * by default as some ARM machines do not support it. + * + */ + evsel->core.attr.exclude_kernel = 1; + ret = evsel__open(evsel, NULL, tmap) >= 0; + } + evsel__delete(evsel); + } + + perf_thread_map__put(tmap); + return ret; +} + int print_hwcache_events(const struct print_callbacks *print_cb, void *print_state) { struct perf_pmu *pmu = NULL; |