[PATCH 2/3] perf, tools, list: Support matching by topic

[Andi Kleen <andi@firstfloor.org>]

From: Andi Kleen <ak@linux.intel.com>

Add support in perf list topic to only show events belonging to a specific
vendor events topic. For example the following works now:

% perf list frontend
List of pre-defined events (to be used in -e):

  stalled-cycles-frontend OR idle-cycles-frontend    [Hardware event]

  stalled-cycles-frontend OR cpu/stalled-cycles-frontend/ [Kernel PMU event]

frontend:
  dsb2mite_switches.count
       [Decode Stream Buffer (DSB)-to-MITE switches]
  dsb2mite_switches.penalty_cycles
       [Decode Stream Buffer (DSB)-to-MITE switch true penalty cycles]
  dsb_fill.exceed_dsb_lines
       [Cycles when Decode Stream Buffer (DSB) fill encounter more than 3 Decode Stream Buffer (DSB)
        lines]
  icache.hit
       [Number of Instruction Cache, Streaming Buffer and Victim Cache Reads. both cacheable and
        noncacheable, including UC fetches]
...

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 tools/perf/util/pmu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 101922b2a243..dc8eb30e8597 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1142,7 +1142,9 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
 			if (event_glob != NULL &&
 			    !(strglobmatch_nocase(name, event_glob) ||
 			      (!is_cpu && strglobmatch_nocase(alias->name,
-						       event_glob))))
+						       event_glob)) ||
+			      (alias->topic &&
+			       strglobmatch_nocase(alias->topic, event_glob))))
 				continue;
 
 			if (is_cpu && !name_only && !alias->desc)
-- 
2.5.5