MFC r273515, r274055, r274063, r274215, r274065, r274502:

Add VirtIO console driver.

share/man/man4/Makefile

@@ -559,6 +559,7 @@ MAN=	aac.4 \
 	${_virtio.4} \
 	${_virtio_balloon.4} \
 	${_virtio_blk.4} \
+	${_virtio_console.4} \
 	${_virtio_random.4} \
 	${_virtio_scsi.4} \
 	vkbd.4 \
@@ -810,6 +811,7 @@ _nxge.4=	nxge.4
 _virtio.4=	virtio.4
 _virtio_balloon.4=virtio_balloon.4
 _virtio_blk.4=	virtio_blk.4
+_virtio_console.4=virtio_console.4
 _virtio_random.4= virtio_random.4
 _virtio_scsi.4= virtio_scsi.4
 _vmx.4=		vmx.4

share/man/man4/virtio.4

@@ -85,6 +85,7 @@ device driver.
 .Sh SEE ALSO
 .Xr virtio_balloon 4 ,
 .Xr virtio_blk 4 ,
+.Xr virtio_console 4 ,
 .Xr virtio_scsi 4 ,
 .Xr vtnet 4
 .Sh HISTORY

share/man/man4/virtio_console.4

@@ -0,0 +1,67 @@
+.\" Copyright (c) 2014 Bryan Venteicher
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd October 22, 2014
+.Dt VIRTIO_CONSOLE 4
+.Os
+.Sh NAME
+.Nm virtio_console
+.Nd VirtIO Console driver
+.Sh SYNOPSIS
+To compile this driver into the kernel,
+place the following lines in your
+kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device virtio_console"
+.Ed
+.Pp
+Alternatively, to load the driver as a
+module at boot time, place the following line in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+virtio_console_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+device driver provides support for VirtIO console devices.
+.Pp
+The console device may have one or more ports.
+Each port is similar to a simple serial interface, and
+each port is accessible through
+.Xr tty 4 .
+.Sh FILES
+.Bl -tag -width ".Pa /dev/ttyV?.??" -compact
+.It Pa /dev/ttyV?.??
+.El
+.Sh SEE ALSO
+.Xr tty 4
+.Xr virtio 4
+.Sh HISTORY
+The
+.Nm
+driver was written by
+.An Bryan Venteicher Aq [email protected] .

sys/amd64/conf/NOTES

@@ -477,6 +477,7 @@ device		virtio_blk	# VirtIO Block device
 device		virtio_scsi	# VirtIO SCSI device
 device		virtio_balloon	# VirtIO Memory Balloon device
 device		virtio_random	# VirtIO Entropy device
+device		virtio_console	# VirtIO Console device
 
 device 		hyperv		# HyperV drivers
 

sys/conf/files.amd64

@@ -469,6 +469,7 @@ dev/virtio/block/virtio_blk.c		optional	virtio_blk
 dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon
 dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi
 dev/virtio/random/virtio_random.c	optional	virtio_random
+dev/virtio/console/virtio_console.c	optional	virtio_console
 isa/syscons_isa.c		optional	sc
 isa/vga_isa.c			optional	vga
 kern/imgact_binmisc.c		optional	imagact_binmisc

sys/conf/files.i386

@@ -416,6 +416,7 @@ dev/virtio/block/virtio_blk.c		optional	virtio_blk
 dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon
 dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi
 dev/virtio/random/virtio_random.c	optional	virtio_random
+dev/virtio/console/virtio_console.c	optional	virtio_console
 i386/acpica/acpi_machdep.c	optional acpi
 acpi_wakecode.o			optional acpi				\
 	dependency	"$S/i386/acpica/acpi_wakecode.S assym.s"	\