Re: [PATCH v4 02/18] riscv: sbi: add new SBI error mappings

[Andrew Jones <ajones@ventanamicro.com>]

On Mon, Mar 17, 2025 at 06:06:08PM +0100, Clément Léger wrote:
> A few new errors have been added with SBI V3.0, maps them as close as
> possible to errno values.
> 
> Signed-off-by: Clément Léger <cleger@rivosinc.com>
> ---
>  arch/riscv/include/asm/sbi.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> index bb077d0c912f..d11d22717b49 100644
> --- a/arch/riscv/include/asm/sbi.h
> +++ b/arch/riscv/include/asm/sbi.h
> @@ -536,11 +536,20 @@ static inline int sbi_err_map_linux_errno(int err)
>  	case SBI_SUCCESS:
>  		return 0;
>  	case SBI_ERR_DENIED:
> +	case SBI_ERR_DENIED_LOCKED:
>  		return -EPERM;
>  	case SBI_ERR_INVALID_PARAM:
> +	case SBI_ERR_INVALID_STATE:
> +	case SBI_ERR_BAD_RANGE:
>  		return -EINVAL;
>  	case SBI_ERR_INVALID_ADDRESS:
>  		return -EFAULT;
> +	case SBI_ERR_NO_SHMEM:
> +		return -ENOMEM;
> +	case SBI_ERR_TIMEOUT:
> +		return -ETIME;
> +	case SBI_ERR_IO:
> +		return -EIO;
>  	case SBI_ERR_NOT_SUPPORTED:
>  	case SBI_ERR_FAILURE:
>  	default:
> -- 
> 2.47.2
>

I'm not a huge fan sbi_err_map_linux_errno() since the mappings seem a bit
arbitrary, but if we're going to do it, then these look pretty good to me.
Only other thought I had was E2BIG for bad-range, but nah...

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>

Thanks,
drew