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Re: [Xen-users] Xen/Windows on AMD; use of PCI / USB

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Xen/Windows on AMD; use of PCI / USB
From: Mark Williamson <mark.williamson@xxxxxxxxxxxx>
Date: Sat, 23 Dec 2006 18:03:59 +0000
Cc: Gerhard Wendebourg <gw@xxxxxxxxx>, Alain Black <hippy@xxxxxxxxxxxx>, 'Andreas Fromm' <afromm@xxxxxxxxxxxxxxxxxxxxxx>
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> since I found, that AMD is suitable to work with Windows on Xen, the
> additional question for the use of physical PCI / USB Devices by the
> Windows-guest.

Passing PCI devices through to Windows guests won't work, and probably won't 
work for the forseeable future (really, you'd want IOMMU hardware for this to 
work, and "normal" x86 systems don't have this hardware).

You might be able to pass USB devices through from dom0 by configuring the 
attached devices appropriately...  Vanilla Qemu can pass USB devices through 
to its guests, so maybe the Qemu device models can also do this...

USB is fundamentally easier to pass through to guests, which is why its 
available and PCI passthrough is not.

Hope that helps some, sorry for not being more specific.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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