[PATCH 5/6] perf, tool: Add support to specify hw event as pmu event term

[Jiri Olsa]

Adding a way to specify hw event as pmu event term like:
 'cpu/event=cpu-cycles/u'
 'cpu/event=instructions,.../u'

The 'event=cpu-cycles' term is replaced/translated by the hw events
term translation, which is exposed by sysfs 'events' group attribute.

Adding parser bits, the rest is already handled by the pmu alias code.

Signed-off-by: Jiri Olsa <jo...@redhat.com>
---
 tools/perf/util/parse-events.c |   13 +++++++++++++
 tools/perf/util/parse-events.h |    2 ++
 tools/perf/util/parse-events.y |    9 +++++++++
 3 files changed, 24 insertions(+)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 1aa721d..780bc45 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1045,6 +1045,19 @@ int parse_events__term_str(struct parse_events__term 
**term,
                        config, str, 0);
 }
 
+int parse_events__term_sym_hw(struct parse_events__term **term,
+                             char *config, unsigned idx)
+{
+       struct event_symbol *sym;
+
+       BUG_ON(idx >= PERF_COUNT_HW_MAX);
+       sym = &event_symbols_hw[idx];
+
+       return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
+                       PARSE_EVENTS__TERM_TYPE_USER, config,
+                       (char *) sym->symbol, 0);
+}
+
 int parse_events__term_clone(struct parse_events__term **new,
                             struct parse_events__term *term)
 {
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index ee9c218..eaf2fd7 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -76,6 +76,8 @@ int parse_events__term_num(struct parse_events__term **_term,
                           int type_term, char *config, long num);
 int parse_events__term_str(struct parse_events__term **_term,
                           int type_term, char *config, char *str);
+int parse_events__term_sym_hw(struct parse_events__term **term,
+                             char *config, unsigned idx);
 int parse_events__term_clone(struct parse_events__term **new,
                             struct parse_events__term *term);
 void parse_events__free_terms(struct list_head *terms);
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 2bc5fbf..9c74d8a 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -269,6 +269,15 @@ PE_NAME '=' PE_VALUE
        $$ = term;
 }
 |
+PE_NAME '=' PE_VALUE_SYM_HW
+{
+       struct parse_events__term *term;
+       int config = $3 & 255;
+
+       ABORT_ON(parse_events__term_sym_hw(&term, $1, config));
+       $$ = term;
+}
+|
 PE_NAME
 {
        struct parse_events__term *term;
-- 
1.7.10.4

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