Re: [Xen-devel] Intel ET Quad Port NIC - PCI Passthrough / VT-d

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Nov 02, 2009 at 08:21:38PM +1100, Simon Horman wrote:
> On Mon, Nov 02, 2009 at 08:37:03AM -0000, Robert Dunkley wrote:
> > Hi Everyone,
> > 
> > 
> > Sorry to bother the Dev list for this but no one seemed to know on the
> > User list. When using this card in PCI passthrough can you pass
> > individual ports to different VMs? Or do you have to pass 2 or the
> > entire 4 ports at a time when using PCI passthrough?
> 
> Hi Robert,
> 
> you should certainly be able to pass through only one of the ports,
> and I expect you should be able to pass through different ports to
> different VMs.

It depends also if you machine does MSI/MSIx. If you do, then yes - each port
to each guest. If you can't do MSI/MSIx then you need to pass the PCI devices
that share the same IRQ to the guest. Which in most cases means you need to 
share
two ports per guest.
> 
> 
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