diff options
| author | Anup Patel <anup.patel@wdc.com> | 2021-07-11 14:28:19 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-07-11 14:31:21 +0530 |
| commit | a76ac4449bf2b67b899ebdb5085834e94987b690 (patch) | |
| tree | f1733139bb9d6c00c3240c213b6ffc5a332b463e | |
| parent | b88b3661d43760fbc06bc83de2c5b204a2bb03dd (diff) | |
lib: sbi: Fix sbi_pmu_exit() for systems not having MCOUNTINHIBIT csr
The sbi_pmu_exit() crashes on systems not having MCOUNTINHIBIT csr
so to fix this we check SBI_HART_HAS_MCOUNTINHIBIT feature in
sbi_pmu_exit() and do nothing if it is not available.
Fixes: 13d40f21d588 ("lib: sbi: Add PMU support")
Signed-off-by: Anup Patel <anup.patel@wdc.com>
| -rw-r--r-- | lib/sbi/sbi_pmu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sbi/sbi_pmu.c b/lib/sbi/sbi_pmu.c index 4092e6f..c276a46 100644 --- a/lib/sbi/sbi_pmu.c +++ b/lib/sbi/sbi_pmu.c @@ -583,6 +583,10 @@ void sbi_pmu_exit(struct sbi_scratch *scratch) { u32 hartid = current_hartid(); + /* SBI PMU is not supported if mcountinhibit is not available */ + if (!sbi_hart_has_feature(scratch, SBI_HART_HAS_MCOUNTINHIBIT)) + return; + csr_write(CSR_MCOUNTINHIBIT, 0xFFFFFFF8); csr_write(CSR_MCOUNTEREN, 7); pmu_reset_event_map(hartid); |