diff --git a/arch/loongarch/kernel/perf_event.c b/arch/loongarch/kernel/perf_event.c
index ff28f99b47d7..0491bf453cd4 100644
--- a/arch/loongarch/kernel/perf_event.c
+++ b/arch/loongarch/kernel/perf_event.c
@@ -271,7 +271,7 @@ static void loongarch_pmu_enable_event(struct hw_perf_event *evt, int idx)
 	WARN_ON(idx < 0 || idx >= loongarch_pmu.num_counters);
 
 	/* Make sure interrupt enabled. */
-	cpuc->saved_ctrl[idx] = M_PERFCTL_EVENT(evt->event_base & 0xff) |
+	cpuc->saved_ctrl[idx] = M_PERFCTL_EVENT(evt->event_base) |
 		(evt->config_base & M_PERFCTL_CONFIG_MASK) | CSR_PERFCTRL_IE;
 
 	cpu = (event->cpu >= 0) ? event->cpu : smp_processor_id();
@@ -594,7 +594,7 @@ static struct pmu pmu = {
 
 static unsigned int loongarch_pmu_perf_event_encode(const struct loongarch_perf_event *pev)
 {
-	return (pev->event_id & 0xff);
+	return M_PERFCTL_EVENT(pev->event_id);
 }
 
 static const struct loongarch_perf_event *loongarch_pmu_map_general_event(int idx)
@@ -849,7 +849,7 @@ static void resume_local_counters(void)
 
 static const struct loongarch_perf_event *loongarch_pmu_map_raw_event(u64 config)
 {
-	raw_event.event_id = config & 0xff;
+	raw_event.event_id = M_PERFCTL_EVENT(config);
 
 	return &raw_event;
 }