Index: sys/dev/virtio/console/virtio_console.c
===================================================================
--- sys/dev/virtio/console/virtio_console.c
+++ sys/dev/virtio/console/virtio_console.c
@@ -74,6 +74,11 @@
 	struct vtcon_softc		*vtcport_sc;
 	struct vtcon_softc_port		*vtcport_scport;
 	struct tty			*vtcport_tty;
+	struct consdev			*vtcport_consdev;
+	char				*vtcport_name;
+	char				*vtcport_buf;
+	uint32_t			 vtcport_buf_len;
+	uint32_t			 vtcport_buf_pos;
 	struct virtqueue		*vtcport_invq;
 	struct virtqueue		*vtcport_outvq;
 	int				 vtcport_id;
@@ -228,6 +233,24 @@
 	.tsw_free	= vtcon_tty_free,
 };
 
+static cn_probe_t	vtcon_cnprobe;
+static cn_init_t	vtcon_cninit;
+static cn_term_t	vtcon_cnterm;
+static cn_getc_t	vtcon_cngetc;
+static cn_putc_t	vtcon_cnputc;
+static cn_grab_t	vtcon_cngrab;
+static cn_ungrab_t	vtcon_cnungrab;
+
+const struct consdev_ops vtcon_cnops = {
+	.cn_probe	= vtcon_cnprobe,
+	.cn_init	= vtcon_cninit,
+	.cn_term	= vtcon_cnterm,
+	.cn_getc	= vtcon_cngetc,
+	.cn_putc	= vtcon_cnputc,
+	.cn_grab	= vtcon_cngrab,
+	.cn_ungrab	= vtcon_cnungrab,
+};
+
 static device_method_t vtcon_methods[] = {
 	/* Device methods. */
 	DEVMETHOD(device_probe,		vtcon_probe),
@@ -252,6 +275,99 @@
 MODULE_VERSION(virtio_console, 1);
 MODULE_DEPEND(virtio_console, virtio, 1, 1, 1);
 
+static void
+vtcon_cnregister(struct vtcon_port *port)
+{
+	struct consdev *cp;
+
+	cp = port->vtcport_consdev;
+	if (cp == NULL) {
+		cp = malloc(sizeof(struct consdev), M_DEVBUF,
+		    M_WAITOK | M_ZERO);
+		cp->cn_ops = &vtcon_cnops;
+		cp->cn_arg = port;
+		cp->cn_pri = CN_REMOTE;
+		if (port->vtcport_name != NULL) {
+			strlcpy(cp->cn_name, port->vtcport_name,
+			    sizeof(cp->cn_name));
+		} else {
+			snprintf(cp->cn_name, sizeof(cp->cn_name), "%s%r.%r",
+			    VTCON_TTY_PREFIX,
+			    device_get_unit(port->vtcport_sc->vtcon_dev),
+			    port->vtcport_id);
+		}
+		port->vtcport_consdev = cp;
+	}
+
+	/* Attach the port as console. */
+	cnadd(cp);
+}
+
+static void
+vtcon_cngrab(struct consdev *cp)
+{
+}
+
+static void
+vtcon_cnungrab(struct consdev *cp)
+{
+}
+
+static void
+vtcon_cnprobe(struct consdev *cp)
+{
+}
+
+static void
+vtcon_cninit(struct consdev *cp)
+{
+}
+
+static void
+vtcon_cnterm(struct consdev *cp)
+{
+}
+
+static int
+vtcon_cngetc(struct consdev *cp)
+{
+	struct vtcon_port *port;
+	struct virtqueue *vq;
+	uint32_t len;
+	int ret;
+
+	port = cp->cn_arg;
+	vq = port->vtcport_invq;
+	if (port->vtcport_buf == NULL) {
+		port->vtcport_buf = virtqueue_dequeue(vq, &len);
+		if (port->vtcport_buf == NULL)
+			return (-1);
+		port->vtcport_buf_len = len;
+		port->vtcport_buf_pos = 0;
+	}
+
+	ret = port->vtcport_buf[port->vtcport_buf_pos];
+	port->vtcport_buf_pos++;
+	if (port->vtcport_buf_pos == port->vtcport_buf_len) {
+		vtcon_port_requeue_buf(port, port->vtcport_buf);
+		virtqueue_notify(vq);
+		port->vtcport_buf = NULL;
+	}
+	return (ret);
+}
+
+static void
+vtcon_cnputc(struct consdev *cp, int c)
+{
+	struct vtcon_port *port = cp->cn_arg;
+	char cv = c;
+
+	/*VTCON_PORT_LOCK(port);*/
+	if ((port->vtcport_flags & VTCON_PORT_FLAG_GONE) == 0)
+		vtcon_port_out(port, &cv, 1);
+	/*VTCON_PORT_UNLOCK(port);*/
+}
+
 static int
 vtcon_modevent(module_t mod, int type, void *unused)
 {
@@ -773,6 +889,7 @@
 	port->vtcport_flags |= VTCON_PORT_FLAG_CONSOLE;
 	vtcon_port_submit_event(port, VIRTIO_CONSOLE_PORT_OPEN, 1);
 	VTCON_PORT_UNLOCK(port);
+	vtcon_cnregister(port);
 }
 
 static void
@@ -818,6 +935,7 @@
 		return;
 	}
 
+	port->vtcport_name = strndup(name, len, M_DEVBUF);
 	tty_makealias(port->vtcport_tty, "vtcon/%*s", (int)len, name);
 }
 
@@ -1160,6 +1278,10 @@
 
 	port->vtcport_flags |= VTCON_PORT_FLAG_GONE;
 
+	if (port->vtcport_consdev != NULL)
+		cnremove(port->vtcport_consdev);
+	free(port->vtcport_name, M_DEVBUF);
+
 	if (tp != NULL) {
 		atomic_add_int(&vtcon_pending_free, 1);
 		tty_rel_gone(tp);