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-rw-r--r--arch/arm64/kernel/perf_event.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 7b0643fe2..214b1805e 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -168,7 +168,11 @@ armv8pmu_events_sysfs_show(struct device *dev,
PMU_EVENT_ATTR_ID(name, armv8pmu_events_sysfs_show, config)
static struct attribute *armv8_pmuv3_event_attrs[] = {
- ARMV8_EVENT_ATTR(sw_incr, ARMV8_PMUV3_PERFCTR_SW_INCR),
+ /*
+ * Don't expose the sw_incr event in /sys. It's not usable as writes to
+ * PMSWINC_EL0 will trap as PMUSERENR.{SW,EN}=={0,0} and event rotation
+ * means we don't have a fixed event<->counter relationship regardless.
+ */
ARMV8_EVENT_ATTR(l1i_cache_refill, ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL),
ARMV8_EVENT_ATTR(l1i_tlb_refill, ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL),
ARMV8_EVENT_ATTR(l1d_cache_refill, ARMV8_PMUV3_PERFCTR_L1D_CACHE_REFILL),