perf jevents: Add support for parsing perchip/percore events

Initially, every time we want to add new terms like chip, core thread etc,
we need to create corrsponding fields in pmu_events and event struct.

This patch adds an enum called 'aggr_mode_class' which store all these
aggregation like perchip/percore. It also adds new field 'aggr_mode'
to capture these terms.

Now, if user wants to add any new term, they just need to add it in
the enum defined.

Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Link: http://lore.kernel.org/lkml/20200907064133.75090-4-kjain@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/pmu-events/jevents.c

@@ -48,6 +48,7 @@
 #include <linux/list.h>
 #include "jsmn.h"
 #include "json.h"
+#include "pmu-events.h"
 
 int verbose;
 char *prog;
@@ -60,13 +61,25 @@ struct json_event {
 	char *pmu;
 	char *unit;
 	char *perpkg;
+	char *aggr_mode;
 	char *metric_expr;
 	char *metric_name;
 	char *metric_group;
 	char *deprecated;
 	char *metric_constraint;
 };
 
+enum aggr_mode_class convert(const char *aggr_mode)
+{
+	if (!strcmp(aggr_mode, "PerCore"))
+		return PerCore;
+	else if (!strcmp(aggr_mode, "PerChip"))
+		return PerChip;
+
+	pr_err("%s: Wrong AggregationMode value '%s'\n", prog, aggr_mode);
+	return -1;
+}
+
 typedef int (*func)(void *data, struct json_event *je);
 
 int eprintf(int level, int var, const char *fmt, ...)
@@ -356,6 +369,8 @@ static int print_events_table_entry(void *data, struct json_event *je)
 		fprintf(outfp, "\t.unit = \"%s\",\n", je->unit);
 	if (je->perpkg)
 		fprintf(outfp, "\t.perpkg = \"%s\",\n", je->perpkg);
+	if (je->aggr_mode)
+		fprintf(outfp, "\t.aggr_mode = \"%d\",\n", convert(je->aggr_mode));
 	if (je->metric_expr)
 		fprintf(outfp, "\t.metric_expr = \"%s\",\n", je->metric_expr);
 	if (je->metric_name)
@@ -380,6 +395,7 @@ struct event_struct {
 	char *pmu;
 	char *unit;
 	char *perpkg;
+	char *aggr_mode;
 	char *metric_expr;
 	char *metric_name;
 	char *metric_group;
@@ -409,6 +425,7 @@ struct event_struct {
 	op(pmu);						\
 	op(unit);						\
 	op(perpkg);						\
+	op(aggr_mode);						\
 	op(metric_expr);					\
 	op(metric_name);					\
 	op(metric_group);					\
@@ -614,6 +631,8 @@ static int json_events(const char *fn,
 				addfield(map, &je.unit, "", "", val);
 			} else if (json_streq(map, field, "PerPkg")) {
 				addfield(map, &je.perpkg, "", "", val);
+			} else if (json_streq(map, field, "AggregationMode")) {
+				addfield(map, &je.aggr_mode, "", "", val);
 			} else if (json_streq(map, field, "Deprecated")) {
 				addfield(map, &je.deprecated, "", "", val);
 			} else if (json_streq(map, field, "MetricName")) {
@@ -674,6 +693,7 @@ static int json_events(const char *fn,
 		free(je.pmu);
 		free(filter);
 		free(je.perpkg);
+		free(je.aggr_mode);
 		free(je.deprecated);
 		free(je.unit);
 		free(je.metric_expr);

tools/perf/pmu-events/pmu-events.h

@@ -2,6 +2,11 @@
 #ifndef PMU_EVENTS_H
 #define PMU_EVENTS_H
 
+enum aggr_mode_class {
+	PerChip = 1,
+	PerCore
+};
+
 /*
  * Describe each PMU event. Each CPU has a table of PMU events.
  */
@@ -14,6 +19,7 @@ struct pmu_event {
 	const char *pmu;
 	const char *unit;
 	const char *perpkg;
+	const char *aggr_mode;
 	const char *metric_expr;
 	const char *metric_name;
 	const char *metric_group;