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Re: [PATCH v8 3/9] xen: add bitmap to indicate per-domain state changes
- To: Juergen Gross <jgross@xxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 6 Mar 2025 16:41:10 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 06 Mar 2025 15:41:32 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 04.02.2025 12:34, Juergen Gross wrote:
> @@ -1075,6 +1086,26 @@ static void clear_global_virq_handlers(struct domain
> *d)
> }
> }
>
> +struct domain *lock_dom_exc_handler(void)
> +{
> + struct domain *d;
> +
> + d = get_global_virq_handler(VIRQ_DOM_EXC);
The Arm dom0less crash(es?) found by CI are apparently a result of this possibly
returning NULL (hardware_domain == NULL). Returning NULL from here also in this
case (and not just ...
> + if ( unlikely(!get_domain(d)) )
> + return NULL;
... in this one) would at least deal with the use from domain_changed_state(). I
didn't closely check other uses. Thoughts?
Jan
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