kern/53372: virtio(4) does not comply with VIRTIO v1.0

[jakllsch%NetBSD.org@localhost]

>Number:         53372
>Category:       kern
>Synopsis:       virtio(4) does not comply with VIRTIO v1.0
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Sat Jun 16 13:25:00 +0000 2018
>Originator:     Jonathan A. Kollasch
>Release:        NetBSD 7.1.2
>Organization:
	
>Environment:
	
	
>Description:
The virtio(4) family of drivers do not conform to Virtual I/O Device
(VIRTIO) Version 1.0 specification.  Currently the drivers only
implement the legacy Virtio 0.9.x interface, and thus will not work with
standardized VIRTIO v1.0 devices that do not implement the optional
backwards compatibility support (Transitional Device).

This PR is a follow-up to PR #52107.
>How-To-Repeat:

>Fix:
Implement VIRTIO v1.0 w/ Transitional Driver option.

>Unformatted: