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Re: [Xen-devel] PCI passthrough of multiple devices to HVM guest using s

from [Stefano Stabellini]

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To:	Jason Sonnek <jsonnek@xxxxxxxxx>
Subject:	Re: [Xen-devel] PCI passthrough of multiple devices to HVM guest using stub domain not working
From:	Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date:	Wed, 16 Feb 2011 19:03:26 +0000
Cc:	Ian, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Campbell <Ian.Campbell@xxxxxxxxxx>
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On Wed, 16 Feb 2011, Jason Sonnek wrote:
> Only the first function of the first device that I pass-through to an
> HVM guest using a stub domain successfully registers. If the first
> device in the "pci=[....]" line in the configuration file has a single
> function, the guest will boot and the first device will be
> passed-through successfully, but only none of the devices listed after
> the first will work. If the first device in the configuration file has
> multiple functions, the guest will hang during start-up.
> 
> I'm using Xen 4.0.1 / pv_ops 2.6.32.25 Dom0. Works fine using qemu-dm
> in Dom0 instead of stubdom-dm. I've tested this with multiple devices.

I am not too surprised because PCI passthrough of multiple devices to
HVM guests with stubdoms is broken even on xen-unstable. IanC might be
able to give you more details.


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