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Re: [Xen-ia64-devel] domU stability

To: "Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>
Subject: Re: [Xen-ia64-devel] domU stability
From: Matt Chapman <matthewc@xxxxxxxxxxxxxxx>
Date: Wed, 16 Nov 2005 17:28:22 +1100
Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx, Tristan Gingold <Tristan.Gingold@xxxxxxxx>
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On Tue, Nov 15, 2005 at 09:30:05PM -0800, Magenheimer, Dan (HP Labs Fort 
Collins) wrote:
> Doesn't a domU virtual address e000010000000009 indicate the 9th entry
> in the grant table?

Yes (though of course the entries are larger than 1 byte).  But Xen
only cares that it's at 0x10000000009 metaphysical; the virtual
mapping is up to the guest.

>  Or am I remembering an old design that wasn't
> implemented?  Or if this is correct, where does this translation
> get done?  Is it just a normal metaphysical->physical translation in the
> 3-level lookup table?

It's a normal metaphysical->physical translation.  It gets installed
by gnttab_setup_table using map_domain_page.

Matt


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