[RFC PATCH 0/3] KVM: x86: honor guest memory type

[Gerd Hoffmann]

  Hi,

> > The plan is for virtio-gpu device to reserve a huge memory region in
> > the guest.  Memslots may be added dynamically or statically to back
> > the region.
> 
> so the region is marked as E820_RESERVED to prevent guest kernel 
> from using it for other purpose and then virtio-gpu device will report
> virtio-gpu driver of the exact location of the region through its own
> interface?

It's large pci bar, to reserve address space, using (recently added)
virtio shared memory support.  dma-bufs are mapped dynamically as
sub-regions into that pci bar.

At kvm level that'll end up as one memory slot per dma-buf.

cheers,
  Gerd