Add very simple virtio_random(4) driver to harvest entropy from host

Reviewed by:	markm (random bits only)

2 files changed, 37 insertions, 1 deletions

diff --git a/sys/modules/virtio/Makefile b/sys/modules/virtio/Makefile
index 12846b2b8066..ecf9441fe081 100644
--- a/sys/modules/virtio/Makefile
+++ b/sys/modules/virtio/Makefile
@@ -23,6 +23,6 @@
 # SUCH DAMAGE.
 #
 
-SUBDIR=	virtio pci network block balloon scsi
+SUBDIR=	virtio pci network block balloon scsi random
 
 .include <bsd.subdir.mk>
diff --git a/sys/modules/virtio/random/Makefile b/sys/modules/virtio/random/Makefile
new file mode 100644
index 000000000000..fb5b9b0cb22e
--- /dev/null
+++ b/sys/modules/virtio/random/Makefile
@@ -0,0 +1,36 @@
+#
+# $FreeBSD$
+#
+# 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.
+#
+
+.PATH: ${.CURDIR}/../../../dev/virtio/random
+
+KMOD=	virtio_random
+SRCS=	virtio_random.c
+SRCS+=	virtio_bus_if.h virtio_if.h
+SRCS+=	bus_if.h device_if.h
+
+MFILES=	kern/bus_if.m kern/device_if.m \
+	dev/virtio/virtio_bus_if.m dev/virtio/virtio_if.m
+
+.include <bsd.kmod.mk>