Guests cannot access IMPDEF system registers, which are used
by this driver. Disable the driver if it's running in a guest VM.
Signed-off-by: Neil Leeder <nlee...@codeaurora.org>
---
drivers/perf/qcom_l2_pmu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/perf/qcom_l2_pmu.c b/drivers/perf/qcom_l2_pmu.c
index 4fdc848..49dc954 100644
--- a/drivers/perf/qcom_l2_pmu.c
+++ b/drivers/perf/qcom_l2_pmu.c
@@ -1057,6 +1057,10 @@ static int __init register_l2_cache_pmu_driver(void)
{
int err;
+ /* Don't enable driver if running as guest */
+ if (!is_hyp_mode_available())
+ return 0;
+
err = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE,
"AP_PERF_ARM_QCOM_L2_ONLINE",
l2cache_pmu_online_cpu,
--
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies
Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
