[vfio-users] Windows7 Guest using K2 Grid

[Alex Williamson]

On Fri, 2015-10-09 at 16:48 -0700, James McEvoy wrote:
> We have gotten CentOS6.7 guests to work with a K2 Grid GPU with OpenStack.
> Now we are trying to get a windows VM to use the same K2 Grid GPU.
> The question I have is do we need a virtual VGA if we have a real nVidia K2
> card passed through to the Windows7 guest VM or can we just define a
> Display?
> I ask because we could not get a CentOS guest to boot without defining a
> Cirrus VGA in the libvirt.xml file.  On CentOS without a virtual VGA and
> Display
> the VM would start but never boot and just st there using 100% of one of
> the CPUs.

I can say that for RHEL7 hosts, we only support Quadro/Grid/Tesla as
non-primary graphics in the VM.  An emulated primary graphics is always
required, for Linux or Windows guests.  The emulated graphics can be
disabled in the guest OS, but there's no other way to interact with the
guest pre-boot.