diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c
index 126dc679b230..5350d91acef5 100644
--- a/arch/arm/kernel/perf_event_v7.c
+++ b/arch/arm/kernel/perf_event_v7.c
@@ -991,7 +991,7 @@ static void armv7pmu_reset(void *info)
 	}
 
 	/* Initialize & Reset PMNC: C and P bits */
-	armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C);
+	armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_P | ARMV7_PMNC_C);
 }
 
 static int armv7_a8_map_event(struct perf_event *event)
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 5b1897e8ca24..c7491471b04d 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -573,7 +573,7 @@ static void armv8pmu_reset(void *info)
 	}
 
 	/* Initialize & Reset PMNC: C and P bits. */
-	armv8pmu_pmcr_write(ARMV8_PMCR_P | ARMV8_PMCR_C);
+	armv8pmu_pmcr_write(armv8pmu_pmcr_read() | ARMV8_PMCR_P | ARMV8_PMCR_C);
 
 	/* Disable access from userspace. */
 	asm volatile("msr pmuserenr_el0, %0" :: "r" (0));