[PATCH v2 1/1] lib: sbi: Allow programmable counters to monitor cycle/instret events for Andes PMU

[Anup Patel]

On Fri, Mar 28, 2025 at 2:12 PM Leo Yu-Chi Liang <ycliang at andestech.com> wrote:
>
> Referencing commit 0c304b661965
> ("lib: sbi: Allow programmable counters to monitor cycle/instret events")
> to support this functionality for Andes PMU.
>
> Signed-off-by: Leo Yu-Chi Liang <ycliang at andestech.com>
> Reviewed-by: Samuel Holland <samuel.holland at sifive.com>

Applied this patch to the riscv/opensbi repo.

Thanks,
Anup

> ---
> Change since v1:
>         - Modify the comment
> ---
>  lib/sbi/sbi_pmu.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/lib/sbi/sbi_pmu.c b/lib/sbi/sbi_pmu.c
> index b9e84543..575799eb 100644
> --- a/lib/sbi/sbi_pmu.c
> +++ b/lib/sbi/sbi_pmu.c
> @@ -719,12 +719,13 @@ static int pmu_ctr_find_hw(struct sbi_pmu_hart_state *phs,
>                 return SBI_EINVAL;
>
>         /**
> -        * If Sscof is present try to find the programmable counter for
> -        * cycle/instret as well.
> +        * If Sscofpmf or Andes PMU is present, try to find
> +        * the programmable counter for cycle/instret as well.
>          */
>         fixed_ctr = pmu_ctr_find_fixed_hw(event_idx);
>         if (fixed_ctr >= 0 &&
> -           !sbi_hart_has_extension(scratch, SBI_HART_EXT_SSCOFPMF))
> +           !sbi_hart_has_extension(scratch, SBI_HART_EXT_SSCOFPMF) &&
> +           !sbi_hart_has_extension(scratch, SBI_HART_EXT_XANDESPMU))
>                 return pmu_fixed_ctr_update_inhibit_bits(fixed_ctr, flags);
>
>         if (sbi_hart_priv_version(scratch) >= SBI_HART_PRIV_VER_1_11)
> --
> 2.34.1
>
>
> --
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