perf tools: Add config options support for event parsing

Adding a new rule to the event grammar to be able to specify
values of additional attributes of symbolic event.

The new syntax for event symbolic definition is:

event_legacy_symbol:  PE_NAME_SYM '/' event_config '/' |
                      PE_NAME_SYM sep_slash_dc

event_config:         event_config ',' event_term | event_term

event_term:           PE_NAME '=' PE_NAME |
                      PE_NAME '=' PE_VALUE
                      PE_NAME

sep_slash_dc: '/' | ':' |

At the moment the config options are hardcoded to be used for legacy
symbol events to define several perf_event_attr fields. It is:

  'config'   to define perf_event_attr::config
  'config1'  to define perf_event_attr::config1
  'config2'  to define perf_event_attr::config2
  'period'   to define perf_event_attr::sample_period

Legacy events could be now specified as:
  cycles/period=100000/

If term is specified without the value assignment, then 1 is
assigned by default.

Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-mgkavww9790jbt2jdkooyv4q@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.h b/tools/perf/util/parse-events.h
index 84d37714f3bc..37a270d91d39 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -33,6 +33,34 @@ extern int parse_filter(const struct option *opt, const char *str, int unset);
 
 #define EVENTS_HELP_MAX (128*1024)
 
+enum {
+        PARSE_EVENTS__TERM_TYPE_CONFIG,
+        PARSE_EVENTS__TERM_TYPE_CONFIG1,
+        PARSE_EVENTS__TERM_TYPE_CONFIG2,
+        PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD,
+        PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE,
+        PARSE_EVENTS__TERM_TYPE_NUM,
+        PARSE_EVENTS__TERM_TYPE_STR,
+
+        PARSE_EVENTS__TERM_TYPE_HARDCODED_MAX =
+                PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE,
+};
+
+struct parse_events__term {
+        char *config;
+        union {
+                char *str;
+                long  num;
+        } val;
+        int type;
+
+        struct list_head list;
+};
+
+int parse_events__is_hardcoded_term(struct parse_events__term *term);
+int parse_events__new_term(struct parse_events__term **term, int type,
+                           char *config, char *str, long num);
+void parse_events__free_terms(struct list_head *terms);
 int parse_events_modifier(struct list_head *list __used, char *str __used);
 int parse_events_add_tracepoint(struct list_head *list, int *idx,
                                 char *sys, char *event);
@@ -40,7 +68,8 @@ int parse_events_add_raw(struct perf_evlist *evlist, unsigned long config,
                          unsigned long config1, unsigned long config2,
                          char *mod);
 int parse_events_add_numeric(struct list_head *list, int *idx,
-                             unsigned long type, unsigned long config);
+                             unsigned long type, unsigned long config,
+                             struct list_head *head_config);
 int parse_events_add_cache(struct list_head *list, int *idx,
                            char *type, char *op_result1, char *op_result2);
 int parse_events_add_breakpoint(struct list_head *list, int *idx,