Re: [RFC PATCH 2/2] plat/rcar: Add region id support for PCI

[Julien Grall <julien@xxxxxxx>]

Hi Mykyta,

On 21/04/2026 08:57, Mykyta Poturai wrote:
> diff --git a/xen/arch/arm/platforms/Kconfig b/xen/arch/arm/platforms/Kconfig
> index 888d0b85d5..db096952c8 100644
> --- a/xen/arch/arm/platforms/Kconfig
> +++ b/xen/arch/arm/platforms/Kconfig
> @@ -64,6 +64,27 @@ config NO_PLAT
>   
>   endchoice
>   
> +menu "RCar Region ID Support"
> +    visible if RCAR4
> +
> +config RCAR_REGION_ID_SUPPORT
> +       bool "Renesas Region ID support for R-Car Gen4 platforms" if EXPERT
> +       depends on RCAR4
> +       help
> +         Enable experimental Region ID support for R-Car Gen4 platforms
> +
> +config RCAR_RGID
> +       int "Region ID encoded in physical address"
> +       depends on RCAR_REGION_ID_SUPPORT
> +       default 0
> +
> +config RCAR_PA_BITS
> +       int "Physical address space size"
> +       depends on RCAR_REGION_ID_SUPPORT
> +       default 36
The 3 configs above implies that the value will change per-board. Is 
that correct? If so, this should be described in the firmware table so a 
single Xen binary can boot on all the platforms.
Cheers,

--
Julien Grall