24 Feb
2020
24 Feb
'20
10:57 a.m.
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