Hi, > Just a question, why didn't we choose the virtio-vga order to avoid > shuffling from the beginning? Vga came after and we keep the > compatibility ?
Well, transitional virtio devices need bar 0 for legacy virtio compatibility (io bar), so using bar 1 for msix makes sense in that case. virtio-vga is new enough that it supports modern only so it doesn't need to worry about legacy virtio compatibility. It does have to worry about vga compatibility though. Therefore it uses a bar layout different from anyone else ... cheers, Gerd
