[Bug 285681] [Hyper-V] i386 panic during storvsc_xferbuf_prepare()

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285681

Mark Millard <marklmi26-fbsd@yahoo.com> changed:

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                 CC|                            |marklmi26-fbsd@yahoo.com

--- Comment #9 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Mark Johnston from comment #7)

I've never been able to get FreeBSD to complete much
of the boot sequence under Hyper-V on the Windows
DevKit 2023 (aarch64) that has Windows 11 Pro.

The console output stops after the masks line of the
EFI framebuffer information or somewhat later. The
farthest I've seen is Event Timer line from the
kernel output. It has stopped between those points
otherwise. No failure notices when ti stops: just
no more output.

It does not get far enough for Hyper-V to be able to
do a shutdown. Hyper-V indicates the VM was still not
ready, even with a long wait first.

arm64 Windows 11 only supports v2 VMs. I converted a
downloaded FreeBSD .vhd to .vhdx in Hyper-V to have
something official to try. (V2 only supports .vhdx .)
(My personal builds have historically behaved
similarly to the above.)

I've never figured out how to get a serial console
and named pipe configuration to work. So I'm
dependent on the monitor being operational.

Anyway, my retry at this got no farther and I was
unable to get anywhere near figuring out how to test.
I've no clue how specific the Hyper-V problems may be
to the Windows DevKit 2023 type of context. So I'm not
sure if anyone else would be able to test. I do not
know if any of it is tied to Warner's UEFI console
related adjustments that he made.

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