VHOST_GET_FEATURES   24 include/uapi/linux/vhost.h #define VHOST_GET_FEATURES	_IOR(VHOST_VIRTIO, 0x00, __u64)
VHOST_GET_FEATURES   24 tools/include/uapi/linux/vhost.h #define VHOST_GET_FEATURES	_IOR(VHOST_VIRTIO, 0x00, __u64)