mirror of
https://github.com/riscv-software-src/opensbi.git
synced 2025-08-24 15:31:22 +01:00
1545afd342
The current implementation computes the possible counter range by doing a left shift of counter base. However, this may overflow depending on the counter base value. In case of overflow, the highest counter id may be computed incorrectly. As per the SBI specification, the respective function should return an error if any of the counter is not valid. Fix the counter index check by avoiding left shifting while doing the sanity checks. Without the shift, the implementation just iterates over the counter mask and computes the correct counter index by adding the base to it. Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Signed-off-by: Atish Patra <atishp@rivosinc.com> Reviewed-by: Anup Patel <anup@brainfault.org>