This is an early RFC for a transport specific early detecton of modern virtio, which is most relevant for transitional devices on big endian platforms, when drivers access the config space before FEATURES_OK is set.
The most important part that is missing here is fixing the problems that arrise in the situation described in the previous paragraph, when the config is managed by a vhost device (and thus outside QEMU). This series was only lightly tested. Halil Pasic (3): virtio: introduce virtio_force_modern() virtio-ccw: use virtio_force_modern virtio-pci: use virtio_force_modern() hw/s390x/virtio-ccw.c | 3 +++ hw/virtio/virtio-pci.c | 1 + hw/virtio/virtio.c | 12 ++++++++++++ include/hw/virtio/virtio.h | 1 + 4 files changed, 17 insertions(+) base-commit: 2c3e83f92d93fbab071b8a96b8ab769b01902475 -- 2.25.1
