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Re: [Xen-users] PCI Passthrough

To: Nick Couchman <Nick.Couchman@xxxxxxxxx>
Subject: Re: [Xen-users] PCI Passthrough
From: Jan Bakuwel <jan.bakuwel@xxxxxxxxx>
Date: Thu, 01 Oct 2009 09:56:06 +1300
Cc: 'XEN Mailing List' <xen-users@xxxxxxxxxxxxxxxxxxx>
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Hi Nick,

I can recommend using a serial server (for instance from
http://www.sena.com) as a much easier and more flexible approach...


Nick Couchman wrote:
> >>> On 2009/09/30 at 09:07, "Dustin Henning"
> <Dustin.Henning@xxxxxxxxxxx> wrote:
> You're likely to get the "sorry, you're out of luck" response, but
> IIRC, PCI Passthrough can be used with one type of domU without
> VT-d/iommu.
> This may require custom compilation or something, though, as it poses a
> security risk.  The answer should be hidden deep within the archives
> of this
> mailing list.
> Dustin
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Nick Couchman
> Sent: Wednesday, September 30, 2009 11:01
> To: XEN Mailing List
> Subject: [Xen-users] PCI Passthrough
> A question that I think I probably know the answer to, but I want to
> verify.
> Do PCI Passthrough to HVM domUs require VTd or IOMMU?  From what I've read
> in various places around the Internet, the answer is yes, but it's never
> been explicitly stated.  I have a multi-port PCI serial card on a
> non-VTd-capable machine that I want to passthrough to a Windows domU.  PCI
> passthrough would be the easiest option, except for the lack of VTd.  I
> tried doing something with the IRQ and IOPORTS to pass it through, but I
> ended up with a device type "Xen Ioports" in my Windows domU and couldn't
> really get the correct driver installed.  Any hints would be appreciated -
> even if it's to say, "Sorry, you're out of luck - go buy a machine with
> VTd."
> Thanks!
> -Nick
> Thanks, Dustin...I'll do some more searching and see what I can come
> up with.
> -Nick
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