[PATCH v4 06/11] lib: sbi: Add SiFive proprietary xsfcease

[Anup Patel]

On Wed, Aug 20, 2025 at 9:03 AM Nick Hu <nick.hu at sifive.com> wrote:
>
> Using ISA string "xsfcease" to detect the support of the custom
> instruction "CEASE".
>
> Signed-off-by: Nick Hu <nick.hu at sifive.com>
> Reviewed-by: Cyan Yang <cyan.yang at sifive.com>

LGTM.

Reviewed-by: Anup Patel <anup at brainfault.org>

Regards,
Anup

> ---
>  include/sbi/sbi_hart.h | 2 ++
>  lib/sbi/sbi_hart.c     | 1 +
>  2 files changed, 3 insertions(+)
>
> diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h
> index fdcf400a..ff682fb4 100644
> --- a/include/sbi/sbi_hart.h
> +++ b/include/sbi/sbi_hart.h
> @@ -83,6 +83,8 @@ enum sbi_hart_extensions {
>         SBI_HART_EXT_SSSTATEEN,
>         /** Hart has Xsfcflushdlone extension */
>         SBI_HART_EXT_XSIFIVE_CFLUSH_D_L1,
> +       /** Hart has Xsfcease extension */
> +       SBI_HART_EXT_XSIFIVE_CEASE,
>
>         /** Maximum index of Hart extension */
>         SBI_HART_EXT_MAX,
> diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
> index 4160ad6c..2519f3f0 100644
> --- a/lib/sbi/sbi_hart.c
> +++ b/lib/sbi/sbi_hart.c
> @@ -716,6 +716,7 @@ const struct sbi_hart_ext_data sbi_hart_ext[] = {
>         __SBI_HART_EXT_DATA(ssctr, SBI_HART_EXT_SSCTR),
>         __SBI_HART_EXT_DATA(ssstateen, SBI_HART_EXT_SSSTATEEN),
>         __SBI_HART_EXT_DATA(xsfcflushdlone, SBI_HART_EXT_XSIFIVE_CFLUSH_D_L1),
> +       __SBI_HART_EXT_DATA(xsfcease, SBI_HART_EXT_XSIFIVE_CEASE),
>  };
>
>  _Static_assert(SBI_HART_EXT_MAX == array_size(sbi_hart_ext),
> --
> 2.17.1
>