Re: [libvirt] [PATCH 0/3] sample: vfio mdev display devices.
From: Alex Williamson
Sent: Thursday, April 19, 2018 2:32 AM
That almost begins to look reasonable, but then we can only expose this
for mdev devices, what if we were to hack a back door into a directly
assigned GPU that tracks the location of active display in the
framebuffer and implement the GFX_PLANE interface for that? We have no
sysfs representation for either the template or the actual device for
anything other than mdev. This inconsistency with physically assigned
devices has been one of my arguments against enhancing mdev sysfs.
One possible option is to wrap directly assigned GPU into a mdev. The
parent driver could be a dummy PCI driver which does basic PCI
initialization, and then provide hooks for vendor-specific hack.
Thanks
Kevin