Centos7 uefi boot problem with bhyve after update

[Peter Grehan]

Hi Mike,

> the fault here could be that of bootrom not reading the files it should

  That is exactly the issue. The current UEFI code does not save 
non-volatile variables to persistent storage. Guest o/s's are 
increasingly writing their efi loaders to non-standard locations and 
using nv vars to direct UEFI to boot from these locations.

  I'm (very slowly) merging a fix from Leon for this in both UEFI and 
bhyve which directs nv var writes to a file on the host, providing a 
persistent store.

later,

Peter.