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Re: [PATCH] domain: adjust soft-reset arch dependency
- To: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 6 Nov 2025 08:36:33 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Penny Zheng <Penny.Zheng@xxxxxxx>, Christopher Clark <christopher.w.clark@xxxxxxxxx>, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Timothy Pearson <tpearson@xxxxxxxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 06 Nov 2025 07:36:56 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 05.11.2025 12:33, Oleksii Kurochko wrote:
>
> On 10/30/25 1:10 PM, 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>
>
> LGTM:
>
> Reviewed-by: Oleksii Kurochko<oleksii.kurochko@xxxxxxxxx>
Thanks, but one remark: Here as well as in your release-acks, can you please
get used to inserting a blank ahead of the opening angle bracket? Roger had
asked (me, not you) about its absence too, the other day.
Jan
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