Re: GPU Passthrough on FreeBSD 14.3 (AMD Radeon RX 6900 XT and Windows 10 Pro)

The machine ran for 22+ hours with no issues. I decided today to do
a fresh restart of the host and the vm to continue testing the
"deterministic stability" of the setup. A few minutes after it started, the VM exited with a 0x88. This is a new error code that
I haven't seen before. I then rebooted the host/vm again and so far it's been running fine for the past 1h27m on idle. So the stability
still seems to be MUCH better than when I was using the multi-functional device on 18/0/0 for the USB controller. Using the 13/0/0  USB controller (that isn't multi-functional) has massively increased
stability. I'm not expecting the VM to be perfectly stable for 365 days 24/7 given that even regular "real" machines also act weird / have issues every once in a while. I've uploaded some of the crashes I got back when I had the 18/0/0 setup which was giving me more frequent crashes with error 0x60, and I've also posted the one I got today after the reboot with 0x88. I'm not sure if this is enough because it's hard to get debug information from the console output that bhyve is displaying. Usually when the VM crashes I just see my console say:

exited with NDELAY mode or something like that. Which is the same message I see when I do a regular shut down. So not very helpful.

You can find the output of "bhyvectl --vm=<name> --get-all" (which includes --get-exit-reason) here: https://xyinn.org/freebsd/files/gpu_pass/bhyve_crashes/

also, does anyone know how I can send the ACPI shutdown signal to my bhyve VM? I looked at the source code for vm-bhyve, and I just see it does a regular 'kill'. I also saw some people online recommending to do a "pkill bhyve", but regardless of what I do, doing a kill/pkill on the PID running my bhyve vm doesn't actually do anything. The VM still continues functioning perfectly fine. I would like to be able to shutdown the machine from the host so I can do a graceful shutdown. I can easily run my start up script by adding:

@reboot root /path/to/gaming/script.sh

in /etc/crontab, and that works fine, but I can't get it a signal from the host to the vm so I can automate the shutdown counterpart.

Thank you!