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

To: "pradeep singh rautela" <rautelap@xxxxxxxxx>
Subject: RE: [Xen-devel] Can I expose a pci device to HVM domU?
From: "Caitlin Bestler" <Caitlin.Bestler@xxxxxxxxxxxx>
Date: Tue, 19 Feb 2008 15:44:09 -0500
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Thread-topic: [Xen-devel] Can I expose a pci device to HVM domU?

> -----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).

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