This series adds support for the virtio 1.0 "emergency write" (VIRTIO_CONSOLE_F_EMERG_WRITE) virtio feature. This is useful for early guest debugging and might be used in cases where the guest crashes so badly that it cannot use virtqueues.
v1→v2: - rebased on current master (resolved conflict: virtio-pci page-per-vq compat property) - split into two patches; no code changes (requested by Amit) Sascha Silbe (2): virtio-serial: add plumbing for virtio console emergency write support virtio-serial: enable virtio console emergency write feature hw/char/virtio-serial-bus.c | 49 ++++++++++++++++++++++++++++++++++++--- include/hw/compat.h | 5 ++++ include/hw/virtio/virtio-serial.h | 2 ++ 3 files changed, 53 insertions(+), 3 deletions(-) -- 1.9.1