Re: [PATCH] domain: adjust soft-reset arch dependency

[Julien Grall <julien@xxxxxxx>]

Hi Jan,

On 30/10/2025 12:10, Jan Beulich wrote:
> Arm's arch_domain_soft_reset() returning -ENOSYS is quite unhelpful: This
> way a domain will be crashed if a tool stack mistakenly invokes
> XEN_DOMCTL_soft_reset on it. Instead the tool stack should be told of its
> mistake.
>
> Introduce HAS_SOFT_RESET, implied only by x86. "imply" rather than
> "select" such that HAS_SOFT_RESET can later gain a dependency on
> MGMT_HYPERCALLS. That way HAS_SOFT_RESET will go off when
> MGMT_HYPERCALLS is off.
>
> Check the new setting early in domctl handling, and compile out the thus
> dead (when HAS_SOFT_RESET=n) domain_soft_reset() as well as its dedicated
> helpers.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Julien GralL <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall