GVT State Save/Restore

[Julian Stecklina]

Hi everyone,

I'm researching what needs to be done to enable VMs with a GVT device to be
saved to disk and restored. This is similar to live migration in the sense that
state of the vGPU needs to be serialized and deserialized, but simpler, because
no dirty page tracking is needed.

I've seen work and discussions towards full live migration support:
- https://www.spinics.net/lists/kvm/msg195198.html
- https://lists.gnu.org/archive/html/qemu-devel/2017-07/msg09242.html
- 
https://events17.linuxfoundation.org/sites/events/files/slides/Live%20migration%20with%20mdev%20device%20-%202017_0.pdf

It doesn't seem like any of the patches actually made it upstream. Are there
some newer PoC patches to look at or did I miss some functionality in the
mediator?

Any info is appreciated!

Thanks,
Julian