perf tools: Add support to specify pmu style event

Added new event rule to the event definition grammar:

event_def: event_pmu |
           ...
event_pmu: PE_NAME '/' event_config '/'

Using this rule, event could be now specified like:
  cpu/config=1,config1=2,config2=3/u

where pmu name 'cpu' is looked up via following path:
  ${sysfs_mount}/bus/event_source/devices/${pmu}

and config options are bound to the pmu's format definiton:
  ${sysfs_mount}/bus/event_source/devices/${pmu}/format

The hardcoded config options still stays and have precedence
over any format field defined with same name.

Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-50d8nr94f8k4wkezutrxvthe@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index c88c08e4e79d..3a530193f5a8 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -61,13 +61,21 @@ event_def PE_MODIFIER_EVENT
 |
 event_def
 
-event_def: event_legacy_symbol |
+event_def: event_pmu |
+           event_legacy_symbol |
            event_legacy_cache sep_dc |
            event_legacy_mem |
            event_legacy_tracepoint sep_dc |
            event_legacy_numeric sep_dc |
            event_legacy_raw sep_dc
 
+event_pmu:
+PE_NAME '/' event_config '/'
+{
+        ABORT_ON(parse_events_add_pmu(list, idx, $1, $3));
+        parse_events__free_terms($3);
+}
+
 event_legacy_symbol:
 PE_VALUE_SYM '/' event_config '/'
 {