To migrate vDPA-net device state though CVQ we need to start the dataplane after the control virtqueue. As vdpa frontend doesn't know if the parent vdpa driver supports it, let's allow them to expose custom backend features by themselves. Comments are welcome. Thanks! v2: address doc issues from checkpath and fix lack of signed-off-by. v1: from RFC: Tweak doc as Shannon suggestion. Eugenio Pérez (4): vdpa: add VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK flag vdpa: accept VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK backend feature vdpa: add get_backend_features vdpa operation vdpa_sim: offer VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK drivers/vdpa/vdpa_sim/vdpa_sim.c | 8 ++++++++ drivers/vhost/vdpa.c | 15 ++++++++++++++- include/linux/vdpa.h | 4 ++++ include/uapi/linux/vhost_types.h | 4 ++++ 4 files changed, 30 insertions(+), 1 deletion(-) -- 2.31.1
