9p: add virtio transport

This adds a transport to 9p for communicating between guests and a host
using a virtio based transport.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>


diff --git a/include/linux/virtio_9p.h b/include/linux/virtio_9p.h
new file mode 100644
index 0000000..8eff0b5
--- /dev/null
+++ b/include/linux/virtio_9p.h
@@ -0,0 +1,10 @@
+#ifndef _LINUX_VIRTIO_9P_H
+#define _LINUX_VIRTIO_9P_H
+#include <linux/virtio_config.h>
+
+/* The ID for virtio console */
+#define VIRTIO_ID_9P	9
+/* Maximum number of virtio channels per partition (1 for now) */
+#define MAX_9P_CHAN	1
+
+#endif /* _LINUX_VIRTIO_9P_H */