port-amd64/43003: amd64 pciback

[julian.bourne%gmail.com@localhost]

>Number:         43003
>Category:       port-amd64
>Synopsis:       amd64 pciback
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 18 17:20:01 +0000 2010
>Originator:     Julian Bourne
>Release:        NetBSD-5.0.2 amd64 xen3.3.2
>Organization:
>Environment:
NetBSD 5.0.2 (XEN_DOM0) #0
>Description:
The amd64 port does not currently support the pciback device.

A separate PR requests multiboot support for amd64.  Together with pciback 
support, an amd64 xen dom0 could be used for painless driver development in 
domU instances.

I'm happy to help with the dev. work on this, though I will likely need quite a 
bit of guidance.
>How-To-Repeat:
On an amd64 xen dom0 with load section boot options such as:

pciback.hide=(01:09.0)

Note that PCI device 01:09.0 will still be configured as normal by NetBSD.

Two reasons for that - no multiboot and no pciback device.
>Fix: