perf parse-events: Compare with hybrid pmu name

On hybrid platform, user may want to enable event only on one pmu.
Following syntax will be supported:

cpu_core/<event>/
cpu_atom/<event>/

For hardware event, hardware cache event and raw event, two events
are created by default. We pass the specified pmu name in parse_state
and it would be checked before event creation. So next only the
event with the specified pmu would be created.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210427070139.25256-12-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/parse-events-hybrid.c

@@ -59,6 +59,15 @@ static int create_event_hybrid(__u32 config_type, int *idx,
 	return 0;
 }
 
+static int pmu_cmp(struct parse_events_state *parse_state,
+		   struct perf_pmu *pmu)
+{
+	if (!parse_state->hybrid_pmu_name)
+		return 0;
+
+	return strcmp(parse_state->hybrid_pmu_name, pmu->name);
+}
+
 static int add_hw_hybrid(struct parse_events_state *parse_state,
 			 struct list_head *list, struct perf_event_attr *attr,
 			 char *name, struct list_head *config_terms)
@@ -67,6 +76,9 @@ static int add_hw_hybrid(struct parse_events_state *parse_state,
 	int ret;
 
 	perf_pmu__for_each_hybrid_pmu(pmu) {
+		if (pmu_cmp(parse_state, pmu))
+			continue;
+
 		ret = create_event_hybrid(PERF_TYPE_HARDWARE,
 					  &parse_state->idx, list, attr, name,
 					  config_terms, pmu);
@@ -103,6 +115,9 @@ static int add_raw_hybrid(struct parse_events_state *parse_state,
 	int ret;
 
 	perf_pmu__for_each_hybrid_pmu(pmu) {
+		if (pmu_cmp(parse_state, pmu))
+			continue;
+
 		ret = create_raw_event_hybrid(&parse_state->idx, list, attr,
 					      name, config_terms, pmu);
 		if (ret)
@@ -138,7 +153,8 @@ int parse_events__add_numeric_hybrid(struct parse_events_state *parse_state,
 int parse_events__add_cache_hybrid(struct list_head *list, int *idx,
 				   struct perf_event_attr *attr, char *name,
 				   struct list_head *config_terms,
-				   bool *hybrid)
+				   bool *hybrid,
+				   struct parse_events_state *parse_state)
 {
 	struct perf_pmu *pmu;
 	int ret;
@@ -149,6 +165,9 @@ int parse_events__add_cache_hybrid(struct list_head *list, int *idx,
 
 	*hybrid = true;
 	perf_pmu__for_each_hybrid_pmu(pmu) {
+		if (pmu_cmp(parse_state, pmu))
+			continue;
+
 		ret = create_event_hybrid(PERF_TYPE_HW_CACHE, idx, list,
 					  attr, name, config_terms, pmu);
 		if (ret)

tools/perf/util/parse-events-hybrid.h

@@ -17,6 +17,7 @@ int parse_events__add_numeric_hybrid(struct parse_events_state *parse_state,
 int parse_events__add_cache_hybrid(struct list_head *list, int *idx,
 				   struct perf_event_attr *attr, char *name,
 				   struct list_head *config_terms,
-				   bool *hybrid);
+				   bool *hybrid,
+				   struct parse_events_state *parse_state);
 
 #endif /* __PERF_PARSE_EVENTS_HYBRID_H */

tools/perf/util/parse-events.c

@@ -453,7 +453,8 @@ static int config_attr(struct perf_event_attr *attr,
 int parse_events_add_cache(struct list_head *list, int *idx,
 			   char *type, char *op_result1, char *op_result2,
 			   struct parse_events_error *err,
-			   struct list_head *head_config)
+			   struct list_head *head_config,
+			   struct parse_events_state *parse_state)
 {
 	struct perf_event_attr attr;
 	LIST_HEAD(config_terms);
@@ -524,7 +525,7 @@ int parse_events_add_cache(struct list_head *list, int *idx,
 
 	ret = parse_events__add_cache_hybrid(list, idx, &attr,
 					     config_name ? : name, &config_terms,
-					     &hybrid);
+					     &hybrid, parse_state);
 	if (hybrid)
 		return ret;
 

tools/perf/util/parse-events.h

@@ -138,6 +138,7 @@ struct parse_events_state {
 	struct list_head	  *terms;
 	int			   stoken;
 	struct perf_pmu		  *fake_pmu;
+	char			  *hybrid_pmu_name;
 };
 
 void parse_events__handle_error(struct parse_events_error *err, int idx,
@@ -188,7 +189,8 @@ int parse_events_add_tool(struct parse_events_state *parse_state,
 int parse_events_add_cache(struct list_head *list, int *idx,
 			   char *type, char *op_result1, char *op_result2,
 			   struct parse_events_error *error,
-			   struct list_head *head_config);
+			   struct list_head *head_config,
+			   struct parse_events_state *parse_state);
 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 				u64 addr, char *type, u64 len);
 int parse_events_add_pmu(struct parse_events_state *parse_state,

tools/perf/util/parse-events.y

@@ -454,7 +454,8 @@ PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT '-' PE_NAME_CACHE_OP_RESULT opt_e
 
 	list = alloc_list();
 	ABORT_ON(!list);
-	err = parse_events_add_cache(list, &parse_state->idx, $1, $3, $5, error, $6);
+	err = parse_events_add_cache(list, &parse_state->idx, $1, $3, $5, error, $6,
+				     parse_state);
 	parse_events_terms__delete($6);
 	free($1);
 	free($3);
@@ -475,7 +476,8 @@ PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT opt_event_config
 
 	list = alloc_list();
 	ABORT_ON(!list);
-	err = parse_events_add_cache(list, &parse_state->idx, $1, $3, NULL, error, $4);
+	err = parse_events_add_cache(list, &parse_state->idx, $1, $3, NULL, error, $4,
+				     parse_state);
 	parse_events_terms__delete($4);
 	free($1);
 	free($3);
@@ -495,7 +497,8 @@ PE_NAME_CACHE_TYPE opt_event_config
 
 	list = alloc_list();
 	ABORT_ON(!list);
-	err = parse_events_add_cache(list, &parse_state->idx, $1, NULL, NULL, error, $2);
+	err = parse_events_add_cache(list, &parse_state->idx, $1, NULL, NULL, error, $2,
+				     parse_state);
 	parse_events_terms__delete($2);
 	free($1);
 	if (err) {