Re: [Xen-devel] [RFC for-4.5 01/12] xen/common: grant-table: only call IOMMU if paging mode translate is disabled

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2014-02-07 at 17:43 +0000, Julien Grall wrote:
> From Xen point of view, ARM guests are PV guest with paging auto translate
> enabled.
> 
> When IOMMU support will be added for ARM, mapping grant ref will always crash
> Xen due to the BUG_ON in __gnttab_map_grant_ref.
> 
> On x86:
>     - PV guests always have paging mode translate disabled
>     - PVH and HVM guests have always paging mode translate enabled
> 
> It means that we can safely replace the check that the domain is a PV guests
> by checking if the guest has paging mode translate enabled.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> Cc: Keir Fraser <keir@xxxxxxx>

Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel