bhyve fails on arm64 -- unknown exception type

[Alexandru Elisei]

Hello,

>From the error message and the symptoms you described, it looks like
something is broken with the world switch code.

Thank you for testing bhyve.

Regards,
Alex

On Mon, Jul 15, 2019 at 11:17 AM Kamil Koczurek <kek at semihalf.com> wrote:

> Hello,
> I'm testing bhyve on an arm64 board, and it fails on a basic use case.
>
> Setup:
>   - board: EspressoBin
>   - FreeBSD 13.0
> (https://github.com/FreeBSD-UPB/freebsd/tree/projects/bhyvearm64-refactor)
>
> Steps to reproduce:
>   $ kldload vmm
>   $ cd /boot/kernel
>   $ bhyveload -k kernel guest
>   $ bhyve guest
>
> The following error appears almost instantly:
>   `arm64_handle_world_switch:534 Unknown exception type: 1514243680`
>
> After this, the board stops responding and requires a hard reset.
> Debugger doesn't kick in either. It's not completely frozen though: I
> can see new kernel messages regarding the attached usb drive.
>
> I believe this might be interesting to people working on bhyve.
>
> Ps. I can collect additional information if needed, feel free to
> contact me either here or privately.
>
> Respectfully,
> Kamil Koczurek
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