[Bug 270805] loader.efi: crashes with USB device attached

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270805

--- Comment #7 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Mark Millard from comment #6)

I found the distinction that controls failure vs.
success in booting via the USB3 ports:

USB3-C ugen0.5: <GenesysLogic USB3.2 Hub> at usbus0 ports:
ZFS and UFS boots fail.

USB3-A ugen0.1: <Generic XHCI root HUB>   at usbus0 ports:
ZFS and UFS boots work.

Looks like the FreeBSD kernel does not handle USB3.2
(but the UEFI/ACPI does for the FreeBSD loader).

This may make the Windows Dev Kit 2023 a useful context
for development work on handling more modern USB3.*'s.

I'll note that https://learn.microsoft.com/en-us/windows/arm/dev-kit/
reports:

QUOTE
When connecting an external keyboard or mouse, use the USB-A ports,
not USB-C. Using USB-C to connect a keyboard or mouse will only work
intermittently.
END QUOTE

(It is unclear if that is a Windows specific issue, UEFI issue,
both, or more.)


For reference for the UFS USB3-C boot failures, the messages
are:

Mounting from ufs:/dev/gpt/CA72USBufs failed with error 22;
retrying for 10 more seconds
Mounting from ufs:/dev/gpt/CA72USBufs failed with error 22;
invalid fstype.

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