[Xen-devel] Re: [RFC] [PATCH] xen, vtd: Check ownership of a domain context using internal structures

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

And in a related note...

What is the implication of the "Devices on a bus behind a bridge look
like they're coming from X:0.0" for passing virtual functions through
to different VMs?  Will it simply not work (since the mapping of X:0.0
can't be owned by both)?  Is there a way it can be made to work
without allowing the virtual function of one domain access to the
memory of the other domain?

 -George

On Wed, Jul 27, 2011 at 11:36 AM, George Dunlap
<George.Dunlap@xxxxxxxxxxxxx> wrote:
> Keir, Jan, et al:
>
> Can you take a look at this patch to see if you think this is the
> right way to solve this problem?
>
> This particular patch is still being tested by the partner who saw the
> problem; but a less safe change -- just returning "OK" if the pci
> device didn't exist -- did solve the problem.  It seemed like this
> check was probably there for a reason, so I wanted to keep it in
> place.  (Although the c/s in which this check was introduced,
> 18906:2941b1a9, only mentioned locking changes, not introduction of
> new checks.)
>
> Thanks,
>  -George
>

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