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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>
Anup Patel 2 anni fa
parent
commit
a76ac4449b
1 ha cambiato i file con 4 aggiunte e 0 eliminazioni
  1. 4 0
      lib/sbi/sbi_pmu.c

+ 4 - 0
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);