Re: [PATCH v9 1/4] xen/arm: Implement PSCI SYSTEM_SUSPEND call for guests

[Julien Grall <julien@xxxxxxx>]

Hi Mykola,

On 26/08/2025 10:09, Mykola Kvach wrote:
> > Shouldn't this be removed so the check also apply for 32-bit domain on
> > 64-bit system?
> AFAIK, this question was already addressed in a previous version of
> this patch series:
> https://patchew.org/Xen/cover.1751020456.git.mykola._5Fkvach@xxxxxxxx/072270e0940b6bcc2743d56a336363f4719ba60a.1751020456.git.mykola._5Fkvach@xxxxxxxx/#7070f416-119c-49f8-acd0-82c6e31f0fc6@xxxxxxx
Sure. For 32-bit domain, in theory the top bits should be zeroed. But 
AFAIK, there is no harm to zero them again and it would avoid someone to 
wonder why this is protected by is_64bit_domain().
So unless there is a strong reason to keep, I would rather prefer if we 
remove the 64-bit.
Cheers,

--
Julien Grall