From a76ac4449bf2b67b899ebdb5085834e94987b690 Mon Sep 17 00:00:00 2001
From: Anup Patel <anup.patel@wdc.com>
Date: Sun, 11 Jul 2021 14:28:19 +0530
Subject: 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>
---
lib/sbi/sbi_pmu.c | 4 ++++
1 file changed, 4 insertions(+)
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);
--
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