From: Anup Patel <anup.patel@wdc.com>
Date: Sun, 11 Jul 2021 08:58:19 +0000 (+0530)
Subject: lib: sbi: Fix sbi_pmu_exit() for systems not having MCOUNTINHIBIT csr
X-Git-Tag: v1.3~483
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a76ac4449bf2b67b899ebdb5085834e94987b690;p=platform%2Fkernel%2Fopensbi-spacemit.git

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>
---

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);