Re: [RFC PATCH v5 07/10] xen: arm: smccc: add INVALID_PARAMETER error code

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Tue, 22 Jul 2025, Oleksii Moisieiev wrote:
> According to the "7.1 Return Codes" section of DEN0028 [1]
> INVALID_PARAMETER code (-3) is returned when one of the call
> parameters has a non-supported value.
> Adding this error code to the common smccc header file.
> 
> [1]: https://documentation-service.arm.com/static/5f8edaeff86e16515cdbe4c6
> 
> Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@xxxxxxxx>

Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>

> ---
> 
> 
> 
>  xen/arch/arm/include/asm/smccc.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/xen/arch/arm/include/asm/smccc.h 
> b/xen/arch/arm/include/asm/smccc.h
> index a289c48b7f..dc6af94db1 100644
> --- a/xen/arch/arm/include/asm/smccc.h
> +++ b/xen/arch/arm/include/asm/smccc.h
> @@ -381,6 +381,7 @@ void arm_smccc_1_2_smc(const struct arm_smccc_1_2_regs 
> *args,
>                         0x3FFF)
>  
>  /* SMCCC error codes */
> +#define ARM_SMCCC_INVALID_PARAMETER     (-3)
>  #define ARM_SMCCC_NOT_REQUIRED          (-2)
>  #define ARM_SMCCC_ERR_UNKNOWN_FUNCTION  (-1)
>  #define ARM_SMCCC_NOT_SUPPORTED         (-1)
> -- 
> 2.34.1
>