[PATCH] lib: utils: Make the enforce permission bit configurable from DT

[Anup Patel]

On Tue, Jan 7, 2025 at 8:13 AM Chao Du <duchao at eswincomputing.com> wrote:
>
> The domain_support.md documentation states that the enforce permission
> bit (BIT[6]) could be set in the "regions" property of a domain
> instance DT node. However, this bit is masked in the current
> implementation. This patch unmasks the bit to make it configurable
> from DT.
>
> Signed-off-by: Chao Du <duchao at eswincomputing.com>

LGTM.

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

Applied this patch to the riscv/opensbi repo.

Thanks,
Anup

> ---
>  lib/utils/fdt/fdt_domain.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/lib/utils/fdt/fdt_domain.c b/lib/utils/fdt/fdt_domain.c
> index 4bc7ed8..d7efc56 100644
> --- a/lib/utils/fdt/fdt_domain.c
> +++ b/lib/utils/fdt/fdt_domain.c
> @@ -289,8 +289,10 @@ static int __fdt_parse_region(const void *fdt, int domain_offset,
>                 return SBI_EINVAL;
>         order = val32;
>
> +       flags = region_access & (SBI_DOMAIN_MEMREGION_ACCESS_MASK
> +                               | SBI_DOMAIN_MEMREGION_ENF_PERMISSIONS);
> +
>         /* Read "mmio" DT property */
> -       flags = region_access & SBI_DOMAIN_MEMREGION_ACCESS_MASK;
>         if (fdt_get_property(fdt, region_offset, "mmio", NULL))
>                 flags |= SBI_DOMAIN_MEMREGION_MMIO;
>
> --
> 2.34.1
>
>
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