On one hand, I did go through heck at one point trying to get the config.plist right to no avail. I then found some guy’s preconfigured OpenCore image made specifically for virtual machines (I usually avoid such things, but as a VM is basically a standardized platform, I’ll take it), upon which my life has been very easy ever since. Passthrough was just a matter of copying my Windows passthrough scripts.
One day, I want to buy a Google Pixel and run LineageOS, but I’m not in the position to do that right now.
Huh. My issue seems different, but I’ll still test that flag to see if it changes anything. My problem looks like the device doesn’t return to host after VM shutdown, possibly because of the reset bug (based on my observation of dmesg), which I hadn’t encountered after about a year of GPU passthrough VM usage.