perf jevents: Support ConfigCode

Some PMUs use "config=XXX" for eventcodes, like:

more /sys/bus/event_source/devices/hisi_sccl1_ddrc3/events/act_cmd
config=0x5

However jevents would give an alias with .event field "event=0x5" for
this event. This is handled without issue by the parse events code, but
the pmu alias code gets a bit confused, as it warns about assigning
"event=0x5" over "config=0x5" in perf_pmu_assign_str() when merging
aliases: ./perf stat -v -e act_cmd ...  alias act_cmd differs in field
'value' ...

To make things a bit more straightforward, allow jevents to support
"config=XXX" as well, by supporting a "ConfigCode" field.

Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Shaokun Zhang <zhangshaokun@hisilicon.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxarm@huawei.com
Cc: liuqi115@huawei.com
Link: https://lore.kernel.org/r/1631795665-240946-3-git-send-email-john.garry@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 323e1dfe2436..19497e4f8a86 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -576,10 +576,12 @@ static int json_events(const char *fn,
 		struct json_event je = {};
 		char *arch_std = NULL;
 		unsigned long long eventcode = 0;
+		unsigned long long configcode = 0;
 		struct msrmap *msr = NULL;
 		jsmntok_t *msrval = NULL;
 		jsmntok_t *precise = NULL;
 		jsmntok_t *obj = tok++;
+		bool configcode_present = false;
 
 		EXPECT(obj->type == JSMN_OBJECT, obj, "expected object");
 		for (j = 0; j < obj->size; j += 2) {
@@ -602,6 +604,12 @@ static int json_events(const char *fn,
 				addfield(map, &code, "", "", val);
 				eventcode |= strtoul(code, NULL, 0);
 				free(code);
+			} else if (json_streq(map, field, "ConfigCode")) {
+				char *code = NULL;
+				addfield(map, &code, "", "", val);
+				configcode |= strtoul(code, NULL, 0);
+				free(code);
+				configcode_present = true;
 			} else if (json_streq(map, field, "ExtSel")) {
 				char *code = NULL;
 				addfield(map, &code, "", "", val);
@@ -683,7 +691,10 @@ static int json_events(const char *fn,
 				addfield(map, &extra_desc, " ",
 						"(Precise event)", NULL);
 		}
-		snprintf(buf, sizeof buf, "event=%#llx", eventcode);
+		if (configcode_present)
+			snprintf(buf, sizeof buf, "config=%#llx", configcode);
+		else
+			snprintf(buf, sizeof buf, "event=%#llx", eventcode);
 		addfield(map, &event, ",", buf, NULL);
 		if (je.desc && extra_desc)
 			addfield(map, &je.desc, " ", extra_desc, NULL);