port-i386/53786: NetBSD/i386 8.0 refuses to boot in bhyve (FreeBSD 11.x/12.x)

[santhosh.raju%gmail.com@localhost]

>Number:         53786
>Category:       port-i386
>Synopsis:       NetBSD/i386 8.0 refuses to boot in bhyve (FreeBSD 11.x/12.x)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Dec 15 06:25:00 +0000 2018
>Originator:     Santhosh Raju
>Release:        8.0
>Organization:
>Environment:
FreeBSD planet-express 11.2-RELEASE-p4 FreeBSD 11.2-RELEASE-p4 #0: Thu Sep 27 08:16:24 UTC 2018     root%amd64-builder.daemonology.net@localhost:/usr/obj/usr/src/sys/GENERIC  amd64
>Description:
NetBSD/i386 8.0 fails to boot in bhyve under both FreeBSD 11.2 an FreeBSD 12.0 

When attempting to boot in bhyve (with debugging on in bhyve) the following message appears in the bhyve.log and bhyve terminates.

vm exit[0]
        reason          VMX
        rip             0x00000000c091f843
        inst_length     7
        status          0
        exit_reason     2
        qualification   0x0000000000000000
        inst_type               0
        inst_error              0

Looking into the VMX reference manual an exit_reason 2 implies a Triple fault occurred in the logical processor.

Attempting to boot NetBSD/amd64 8.0 under the exact same conditions work without issues.
>How-To-Repeat:
Configure a bhyve instance and try booting the NetBSD/i386 8.0 ISO.
>Fix:
I do not know how to debug / fix this problem. 

But I would be more than happy to help investigate this further if someone can help / guide / handhold me into figuring out where exactly this problem lies.