bhyve on 14-CURRENT crashes trying to boot Windows 10 20H2 DVD

[Peter Grehan]

> I've been testing some UEFI firmware changes, but even with the 0.2  > (2014.SP1) port version, I can't boot from the Windows 10 20H2 DVD > 
without causing bhyve to crash. The console output is:
> The command line I'm using is:
> 
> bhyve -AH -s 0:0,hostbridge -s 31:0,lpc -c 1 -m 8G -l 

  No need for the 'A' option: ACPI tables are generated from UEFI. 
However, that should be harmless.

> bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd -l com1,stdio -s 
> 3:0,ahci-hd,bhyve-windows-10-20h2.img -s 
> 29,fbuf,tcp=0.0.0.0:5900,w=1024,h=768,wait -s 
> 7,ahci-cd,en_windows_10_business_editions_version_20h2_updated_jan_2021_x64_dvd_533a330d.iso 
> guest

  You likely need a '-w' option to ignore unimplemented MSRs.

later,

Peter.