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, 30 insertions, 1 deletions

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 59f5cf64ef70..bec1cc6a1f38 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -12,6 +12,7 @@
 #include "header.h"
 #include "debugfs.h"
 #include "parse-events-flex.h"
+#include "pmu.h"
 
 #define MAX_NAME_LEN 100
 
@@ -646,6 +647,30 @@ int parse_events_add_numeric(struct list_head *list, int *idx,
                          (char *) __event_name(type, config));
 }
 
+int parse_events_add_pmu(struct list_head *list, int *idx,
+                         char *name, struct list_head *head_config)
+{
+        struct perf_event_attr attr;
+        struct perf_pmu *pmu;
+
+        pmu = perf_pmu__find(name);
+        if (!pmu)
+                return -EINVAL;
+
+        memset(&attr, 0, sizeof(attr));
+
+        /*
+         * Configure hardcoded terms first, no need to check
+         * return value when called with fail == 0 ;)
+         */
+        config_attr(&attr, head_config, 0);
+
+        if (perf_pmu__config(pmu, &attr, head_config))
+                return -EINVAL;
+
+        return add_event(list, idx, &attr, (char *) "pmu");
+}
+
 int parse_events_modifier(struct list_head *list, char *str)
 {
         struct perf_evsel *evsel;
@@ -957,8 +982,12 @@ void print_events(const char *event_glob)
 
         printf("\n");
         printf("  %-50s [%s]\n",
-                "rNNN (see 'perf list --help' on how to encode it)",
+               "rNNN",
+               event_type_descriptors[PERF_TYPE_RAW]);
+        printf("  %-50s [%s]\n",
+               "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
                event_type_descriptors[PERF_TYPE_RAW]);
+        printf("   (see 'perf list --help' on how to encode it)\n");
         printf("\n");
 
         printf("  %-50s [%s]\n",