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Re: [Xen-devel] [PATCH 0 of 7] pci passthrough with stubdoms

On Mon, 12 Oct 2009, Simon Horman wrote:
> On Mon, Oct 12, 2009 at 06:19:29PM +0100, Stefano Stabellini wrote:
> > Hi all,
> > this patch series enables pci passthrough with stubdoms.
> > Few things still don't work: MSI-X, iomul, and more importantly pci
> > coldplug.
> > This means that you still cannot write pci=['bdf'] in your VM config
> > file, but you can use xm pci-attach to hotplug a device into a VM
> > without any trouble.
> > This is due to a circular dependency introduced by "xend: hot-plug PCI
> > devices at boot-time": during initialization xend waits for the device
> > model to complete pci hotplug while the device model (the stubdom) waits
> > for xend to finish its own initialization.
> Is a possible solution for xend not to wait on qemu in this case?

Yes, I think that would solve the problem.

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