Thread (27 messages) 27 messages, 4 authors, 2021-11-11
DORMANTno replies REVIEWED: 1 (0M)

[PATCH v5 12/12] lib: sbi: Fix initial value mask while updating the counters

From: Anup Patel <anup@brainfault.org>
Date: 2021-11-11 12:50:39

On Tue, Nov 9, 2021 at 12:23 AM Atish Patra [off-list ref] wrote:
The first 32 bits of the initial value for the counter should be
preserved while updating the mhpmcounter for 32bit.

Fixes: 13d40f21d588e ("lib: sbi: Add PMU support")

Signed-off-by: Atish Patra <redacted>
Looks good to me.

Reviewed-by: Anup Patel <redacted>

Applied this patch to the riscv/opensbi repo.

Thanks,
Anup
quoted hunk ↗ jump to hunk
---
 lib/sbi/sbi_pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/sbi/sbi_pmu.c b/lib/sbi/sbi_pmu.c
index e0303a7b19e6..a0eb3592967d 100644
--- a/lib/sbi/sbi_pmu.c
+++ b/lib/sbi/sbi_pmu.c
@@ -270,7 +270,7 @@ static void pmu_ctr_write_hw(uint32_t cidx, uint64_t ival)
 {
 #if __riscv_xlen == 32
        csr_write_num(CSR_MCYCLE + cidx, 0);
-       csr_write_num(CSR_MCYCLE + cidx, ival & 0xFFFF);
+       csr_write_num(CSR_MCYCLE + cidx, ival & 0xFFFFFFFF);
        csr_write_num(CSR_MCYCLEH + cidx, ival >> BITS_PER_LONG);
 #else
        csr_write_num(CSR_MCYCLE + cidx, ival);
--
2.31.1


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