perf parse-events: Avoid error when assigning a legacy cache term

Avoid the parser error:
'''
$ perf stat -e 'cycles/name=l1d/' true
event syntax error: 'cycles/name=l1d/'
                                \___ parser error
'''
by combining the name and legacy cache cases in the parser.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ahmad Yasin <ahmad.yasin@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Edward Baker <edward.baker@intel.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kang Minchul <tegongkang@gmail.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Samantha Alt <samantha.alt@intel.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20230502223851.2234828-36-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/parse-events.c

@@ -1509,6 +1509,16 @@ static int test__term_equal_term(struct evlist *evlist)
 	return TEST_OK;
 }
 
+static int test__term_equal_legacy(struct evlist *evlist)
+{
+	struct evsel *evsel = evlist__first(evlist);
+
+	TEST_ASSERT_VAL("wrong type", evsel->core.attr.type == PERF_TYPE_HARDWARE);
+	TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_CPU_CYCLES));
+	TEST_ASSERT_VAL("wrong name setting", strcmp(evsel->name, "l1d") == 0);
+	return TEST_OK;
+}
+
 #ifdef HAVE_LIBTRACEEVENT
 static int count_tracepoints(void)
 {
@@ -1886,6 +1896,11 @@ static const struct evlist_test test__events[] = {
 		.check = test__term_equal_term,
 		/* 8 */
 	},
+	{
+		.name  = "cycles/name=l1d/",
+		.check = test__term_equal_legacy,
+		/* 9 */
+	},
 };
 
 static const struct evlist_test test__events_pmu[] = {
@@ -2073,6 +2088,12 @@ static const struct evlist_test test__events_pmu[] = {
 		.check = test__term_equal_term,
 		/* 0 */
 	},
+	{
+		.name  = "cpu/cycles,name=l1d/",
+		.valid = test__pmu_cpu_valid,
+		.check = test__term_equal_legacy,
+		/* 1 */
+	},
 };
 
 struct terms_test {

tools/perf/util/parse-events.y

@@ -82,7 +82,7 @@ static void free_list_evsel(struct list_head* list_evsel)
 %type <str> PE_EVENT_NAME
 %type <str> PE_KERNEL_PMU_EVENT PE_PMU_EVENT_FAKE
 %type <str> PE_DRV_CFG_TERM
-%type <str> name_or_raw
+%type <str> name_or_raw name_or_legacy
 %destructor { free ($$); } <str>
 %type <term> event_term
 %destructor { parse_events_term__delete ($$); } <term>
@@ -739,6 +739,8 @@ event_term
 
 name_or_raw: PE_RAW | PE_NAME | PE_LEGACY_CACHE
 
+name_or_legacy: PE_NAME | PE_LEGACY_CACHE
+
 event_term:
 PE_RAW
 {
@@ -752,7 +754,7 @@ PE_RAW
 	$$ = term;
 }
 |
-name_or_raw '=' PE_NAME
+name_or_raw '=' name_or_legacy
 {
 	struct parse_events_term *term;
 
@@ -826,7 +828,7 @@ PE_TERM_HW
 	$$ = term;
 }
 |
-PE_TERM '=' PE_NAME
+PE_TERM '=' name_or_legacy
 {
 	struct parse_events_term *term;
 
@@ -872,7 +874,7 @@ PE_TERM
 	$$ = term;
 }
 |
-name_or_raw array '=' PE_NAME
+name_or_raw array '=' name_or_legacy
 {
 	struct parse_events_term *term;