These patches fix a couple of bugs in virtio-mmio's handling of the registers that deal with the queue size:
* as mst points out, letting the guest flip a queue between "exists" and "doesn't exist" is a bad idea * QueueNumMax wasn't reading the correct value for nonexistent queues This doesn't include any change to the behaviour of queuesize on reset (discussed in other thread); the current behaviour is not a problem for well-behaved guests, and safe in the face of badly-behaved guests, and currently improving the reset behaviour is blocked by an unrelated bug. Peter Maydell (2): hw/virtio/virtio: Don't allow guests to add/remove queues hw/virtio/virtio-mmio: Make QueueNumMax read 0 for unavailable queues hw/virtio/virtio-mmio.c | 3 +++ hw/virtio/virtio.c | 10 +++++++--- 2 files changed, 10 insertions(+), 3 deletions(-) -- 1.7.9.5
