perf test: Make matching_pmu effective

The perf_pmu_test_event.matching_pmu didn't work. No matter what its
value is, it does not affect the test results. So let matching_pmu be
used for matching perf_pmu_test_pmu.pmu.name.

Signed-off-by: Jing Zhang <[e-mail]>
Reviewed-by: John Garry <[e-mail]>
Reviewed-by: Ian Rogers <[e-mail]>
Tested-by: Ian Rogers <[e-mail]>
Cc: James Clark <[e-mail]>
Cc: Will Deacon <[e-mail]>
Cc: Leo Yan <[e-mail]>
Cc: Mike Leach <[e-mail]>
Cc: Shuai Xue <[e-mail]>
Cc: Zhuo Song <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Namhyung Kim <[e-mail]>

tools/perf/tests/pmu-events.c

···
 	},
 	.alias_str = "event=0x2b",
 	.alias_long_desc = "ddr write-cycles event",
-	.matching_pmu = "uncore_sys_ddr_pmu",
+	.matching_pmu = "uncore_sys_ddr_pmu0",
 };
 
 static const struct perf_pmu_test_event sys_ccn_pmu_read_cycles = {
···
 	},
 	.alias_str = "config=0x2c",
 	.alias_long_desc = "ccn read-cycles event",
-	.matching_pmu = "uncore_sys_ccn_pmu",
+	.matching_pmu = "uncore_sys_ccn_pmu4",
 };
 
 static const struct perf_pmu_test_event *sys_events[] = {
···
 			.test_event = &test_event,
 			.count = &matched_count,
 		};
+
+		if (strcmp(pmu_name, test_event.matching_pmu)) {
+			pr_debug("testing aliases uncore PMU %s: mismatched matching_pmu, %s vs %s\n",
+					pmu_name, test_event.matching_pmu, pmu_name);
+			return -1;
+		}
 
 		err = perf_pmu__find_event(pmu, event->name, &args,
 					   test_core_pmu_event_aliases_cb);