[Intel-gfx] 5.14-rc2 warnings with kvmgvt

[Christoph Hellwig]

On Wed, Jul 21, 2021 at 04:43:44PM +0100, Christoph Hellwig wrote:
> > > I'm trying to test some changes for the gvt code, but even with a baseline
> > > 5.14-rc2 host and guest the 915 driver does not seem overly happy:
> > 
> > Is this a regression over -rc1 or over 5.13?
> > Bisect possible?
> 
> This was introduced somewhere between 5.12 and 5.13, still bisecting.
> Note that it only happens for "headless" setups.  Once a display is
> added on the qemu command line it goes away.

The culprit is:

commit f4eb6d4906669b4285c4f49c87814d4ce63c35bb
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Wed Mar 17 18:36:45 2021 +0200

    drm/i915/bios: limit default outputs to ports A through F