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RE: [Xen-devel] Can I expose a pci device to HVM domU?

To: Caitlin Bestler <Caitlin.Bestler@xxxxxxxxxxxx>
Subject: RE: [Xen-devel] Can I expose a pci device to HVM domU?
From: Daniel Stodden <stodden@xxxxxxxxxx>
Date: Tue, 19 Feb 2008 22:35:47 +0100
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Tue, 2008-02-19 at 15:44 -0500, Caitlin Bestler wrote:
> > -----Original Message-----
> > From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> > bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of pradeep singh rautela
> > Sent: Tuesday, February 19, 2008 12:39 PM
> > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > Cc: xen-devel
> > Subject: [Xen-devel] Can I expose a pci device to HVM domU?
> > 
> > Can i assign a PCI device(e.g a NIC) exclusively to a Linux HVM
> > domainU after hiding it from domain 0?
> > 
> > I know that only PV guests are the best candidates for this but I
> > still want to ask, hoping someone might have done some work in latest
> > xen-unstable.
> > 
> > Is there any known way to do this?
> > 
> > PS:- NIC Is does not have Intel's VT-d.
> > 
> If the Guest is HVM, how would it know how to give usable
> DMA addresses to the NIC? (Whether it should be trusted to
> in the absence of an Address Translation Service is the next
> question, but first is whether it could even do it at all).
> A PV Guest, by contrast, would know the distinction between
> GPAs and SPAs (not that it makes it any more trustworthy).

VT-d / IO-MMUs fixes that.


Daniel Stodden
LRR     -      Lehrstuhl für Rechnertechnik und Rechnerorganisation
Institut für Informatik der TU München             D-85748 Garching
http://www.lrr.in.tum.de/~stodden         mailto:stodden@xxxxxxxxxx
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