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Re: [Xen-devel] do_update_va_mapping_otherdomain()
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] do_update_va_mapping_otherdomain() |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Wed, 14 Mar 2007 15:54:38 +0000 |
| Delivery-date: | Wed, 14 Mar 2007 08:53:59 -0700 |
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| Thread-index: | AcdmURHHUJG69tJEEdu8zgAX8io7RQ== |
| Thread-topic: | [Xen-devel] do_update_va_mapping_otherdomain() |
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On 14/3/07 13:23, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
> Isn't this hypercall broken, and should thus be removed as it is entirely
> unused, or alternatively be fixed? do_update_va_mapping() completely
> deals with current->domain in all respects, and guest_{,un}map_l1e()
> seem to also depend on dealing with current.
The hypercall is supposed to operate on the local address space, but map a
foreign page. It calls mod_l1_entry() which should refer to the foreign
domain when it obtains a reference to the page being mapped.
-- Keir
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