Re: [PATCH] SUPPORT.md: clarify support of booting 32-bit Xen on ARMv8

[Julien Grall <julien@xxxxxxx>]

Hi Michal,

On 29/02/2024 12:13, Michal Orzel wrote:
> Since commit bd1001db0af1 ("xen/arm: arm32: Allow Xen to boot on
> unidentified CPUs"), it's been possible to boot 32-bit Xen on ARMv8A CPUs
> in AArch32 state (assuming HW supports EL2 execution in AArch32). Clarify
> the support statement and mark it as Tech Preview, as this use case is
> uncommon and hasn't really been tested/hardened.
>
> Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
> ---
>   SUPPORT.md | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/SUPPORT.md b/SUPPORT.md
> index a90d1108c9d9..acc61230bb5e 100644
> --- a/SUPPORT.md
> +++ b/SUPPORT.md
> @@ -40,6 +40,7 @@ supported in this document.
>       Status: Supported
I would consider to use 'Status, Xen in aarch64 mode: Supported' and then...

>       Status, Cortex A57 r0p0-r1p1: Supported, not security supported
>       Status, Cortex A77 r0p0-r1p0: Supported, not security supported
> +    Status, Xen in AArch32 mode: Tech Preview
... move this line closer. What do you think?

In any case, I am happy with the idea to clarify the SUPPORT state.

Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

>   
>   For the Cortex A57 r0p0 - r1p1, see Errata 832075.
>   For the Cortex A77 r0p0 - r1p0, see Errata 1508412.
Cheers,

--
Julien Grall