UEFI bhyve and EFI shell at boot

[Lars Engels]

On Mon, Sep 26, 2016 at 05:56:59AM +0000, Justin Holcomb wrote:
> > From: owner-freebsd-virtualization at freebsd.org <owner-freebsd-virtualization at freebsd.org> on behalf of Stephan CHEDLIVILI <stephan at theched.org>
> > Sent: Saturday, September 24, 2016 12:50 AM
> > To: freebsd-virtualization at freebsd.org
> > Subject: UEFI bhyve and EFI shell at boot
> >     
> > Hi gents,
> > 
> > I was giving a try to the UEFI-GOP on a FreeBSD 11.0-RC3. Launching the 
> > install of, let's say a Debian works fine and I can attach a VNC viewer for the 
> > progress.
> > 
> > All is fine , even rebooting after the installation is finished I can log in 
> > Debian.
> > 
> > However, when I do a bhyvectl --destroy --vm=xxxxxxx and I try to reboot the 
> > VM and it greets me with the error message "Boot failed, EFI Harddrive" at 
> > boot and sends me to the EFI shell. 
> > 
> > I then have to manually use the shell menu to launch the boot via the ad-hoc 
> > file (/boot/efi/efi/debian/grubx64.efi) and it boot flawlessly.
> > 
> > And of course, the same error happens after I reboot the FreeBSD host machine
> > 
> > Is there somethign I am missing here ? 
> > 
> > Thanks for this admirable piece of work !
> > 
> > -Stephan
> 
> Stephan,
> 
> I have also experienced this as well. My scriptable work around was to start the
> guest with a rEFInd ISO[1] instead a 'null.iso'. rEFInd sees the Debian
> installation on the image/volume and will boot from it after the 15 seconds
> timeout elapses.
> 
> As for the why... my rudimentary understanding is the Debian installation
> creates and relies on the UEFI boot entry it creates during installation.
> However that entry is forgotten once the guest's VMM resources are reclaimed as
> the UEFI environment is not saved and is reloaded exactly from the UEFI ROM
> file (not from the previous state).
> 
> -Justin D Holcomb
> 
> [1] http://www.rodsbooks.com/refind/getting.html

That's also true for Ubuntu 16.04
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