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Re: [Xen-devel] [V1 PATCH 4/5] PVH xen tools: xenstored changes

On Thu, 5 Sep 2013 11:04:53 +0100
Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:

> On Wed, 2013-09-04 at 18:32 -0700, Mukesh Rathor wrote:
> >  Allow map_interface in xenstored to revert to the old
> >  xc_map_foreign_range if xc_gnttab_map_grant_ref is unable
> >  to map the mfn because the guest is auto translate.
> Please can you describe here when/why this might be the case.

In Steffano's words, 

"xenstored is going to try to open the grant table interface
(xc_gnttab_open, implemented via gntdev), if that fails it should fall
back to xc_map_foreign_range. That should work out of the box, or at
least it does for my "hybrid" ARM dom0."

I'll put it in the commit message.


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