Split the 64-bit register accesses if 64-bit access is not supported
by the PMU.
Signed-off-by: Ilkka Koskinen <ilkka@xxxxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Besar Wicaksono <bwicaksono@xxxxxxxxxx>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
---
drivers/perf/arm_cspmu/arm_cspmu.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c
index c59f1e5a35a3..5f4f04135a22 100644
--- a/drivers/perf/arm_cspmu/arm_cspmu.c
+++ b/drivers/perf/arm_cspmu/arm_cspmu.c
@@ -719,7 +719,10 @@ static void arm_cspmu_write_counter(struct perf_event *event, u64 val)
if (use_64b_counter_reg(cspmu)) {
offset = counter_offset(sizeof(u64), event->hw.idx);
- writeq(val, cspmu->base1 + offset);
+ if (cspmu->has_atomic_dword)
+ writeq(val, cspmu->base1 + offset);
+ else
+ lo_hi_writeq(val, cspmu->base1 + offset);
} else {
offset = counter_offset(sizeof(u32), event->hw.idx);
--
2.40.1
