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
