[vfio-users] VM not booting/no video output when PCI passthrough GPU is added

[Eddie Yen]

2015-12-17 5:26 GMT+08:00 Alex Williamson <alex.williamson at redhat.com>:

> On Wed, 2015-12-16 at 19:51 +0200, rndbit wrote:
> > Oh this is something new. Could you explain what exactly replaces
> > vfio-bind?
>
> Check the how-to series on vfio.blogspot.com.  vfio-bind is just a hack
> for binding all the device in a group to vfio-pci.  If you're using
> libvirt, libvirt can do that binding for you.  There's still the
> problem for GPUs though that we want to avoid the native driver
> entirely.  This is often where the pci-stub.ids boot options come into
> play.  The way that Roel is doing it is to bind directly to vfio-pci
> early in the initramfs, solving two problems at once, the native driver
> is avoided and the device is already bound to vfio-pci for assignment.
>
> Agree, since the method that AW wrote on blog using at Fedora, VFIO can
automatically bind GPU that not using by host, also this method can let
host and guest use same model GPU card.

But I'm still trying this method on Ubuntu, for now I have no luck using
this method, even 14.04 or 15.10.



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