[vfio-users] Emulated VGA and real card running in parallel

[Okky Hendriansyah]

I get this running by adding -display qxl on QEMU command line. But instead of using Red Hat QXL Controller driver, I just let Windows recognize it with Windows' generic display adapter. After that the QXL display became the primary and my NVIDIA became secondary.

Installing the Red Hat QXL Controller driver doesn't let me use NVIDIA as the secondary graphics. Or do I need to do additional config for that?

Best regards,
Okky Hendriansyah

> On Sep 17, 2015, at 06:13, Alex Williamson <alex.l.williamson at gmail.com> wrote:
> 
>> On Wed, Sep 16, 2015 at 5:05 PM, Blank Field <ihatethisfield at gmail.com> wrote:
>> Ahh, i can't give you an exact link, but at the 2014 KVM forum talk you've mentioned something called secondary pass through. What is it then?
>> 
> 
> That's what we're talking about, emulated VGA + assigned GPU, the assigned GPU is the secondary graphics for the VM, but depending on guest OS support may become the primary/exclusive.  This is how Nvidia Quadro support actually works.  With that it somehow even works with Seabios, I assume because the Nvidia driver effectively opts-out of VGA arbitration like we have in Linux.  I know that AMD cards can often be assigned this way, but I guess I'm not sure if they can be used concurrently.  I'm pretty sure it works with GeForce.  Seems to be entirely dependent on guest OS and driver support.
> _______________________________________________
> vfio-users mailing list
> vfio-users at redhat.com
> https://www.redhat.com/mailman/listinfo/vfio-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20150917/330183d2/attachment.htm>