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Subject: Re: Centos7 uefi boot problem with bhyve after update
To: Mike Gerdts <mike.gerdts@joyent.com>,
 Michael Reifenberger <mike@reifenberger.com>
Cc: freebsd-virtualization@freebsd.org
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From: Peter Grehan <grehan@freebsd.org>
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Date: Fri, 4 May 2018 06:41:26 -0700
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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.