[Bug 234039] bhyve: NetBSD/i386 8.0 fails to boot

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234039

            Bug ID: 234039
           Summary: bhyve: NetBSD/i386 8.0 fails to boot
           Product: Base System
           Version: 12.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs at FreeBSD.org
          Reporter: santhosh.raju at gmail.com

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

I have tested this on FreeBSD 11.2-RELEASE and FreeBSD 12.0-RELEASE and they
both give the same result. I have *not* tried this on FreeBSD 13-CURRENT.

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.

NetBSD/i386 8.0 is able to boot correctly in real hardware / VirtualBox / QEMU
/ XEN etc.

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.

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