From b8845e420453531f92414b91828c58d6d4f90fff Mon Sep 17 00:00:00 2001
From: Atish Patra <atish.patra@wdc.com>
Date: Mon, 8 Nov 2021 10:53:07 -0800
Subject: lib: sbi: Fix initial value mask while updating the counters
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 <atish.patra@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
---
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 e0303a7..a0eb359 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);
--
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