Issue encountered booting FreeBSD STABLE and CURRENT snapshots with EFI

[Rodney W. Grimes]

[ Charset UTF-8 unsupported, converting... ]
> On Fri, Mar 23, 2018 at 9:58 AM, Rodney W. Grimes
> <freebsd-rwg at pdx.rh.cn85.dnsmgr.net> wrote:
> >> On Fri, Mar 23, 2018 at 3:56 AM, Joe Maloney <jmaloney at ixsystems.com> wrote:
> >> > We narrowed the issue down to how vm-bhyve attaches a null.iso when starting
> >> > the VM.
> >> >
> >>
> >> What exactly are the contents of this null.iso? It sounds like we're
> >
> > touch "null.iso"
> > -rw-r--r--  1 root  wheel  0 Dec  3 22:55 /home/vmbhyve/.config/null.iso
> >
> > It is litterly a 0 byte file.   This is just there to appease windows
> > installer that you have a cd drive.
> >
> > You can test with bhyve yourself this problem by adding:
> >         -s 3:0,ahci-cd,${vm_dir}/.config/null.iso
> > to your bhyve command.
> >
> 
> Thanks for that! A couple hundred printf's later, I think this might
> be a firmware bug or something of the sort (?).
> 
> In this loop [1], the address at 'dp' is getting immediately clobbered
> by the efi_lookup_devpath on every iteration, so we end up looking at
> basically all of the partitions and this null.iso unfortunately meets
> this criteria [2] for removable media with no media present.
> Therefore, we detect absolutely no disks.
> 
> The only candidate in efi_lookup_devpath [3] is the firmware itself
> having overwritten the devpath at that address. We can confirm this
> with a printf just after the efi_lookup_devpath- the pointer it's
> returning is in fact exactly match 'dp' every single time.
> 
> Is there a newer/different firmware you can try? This seems like
> really peculiar behavior for a firmware to be exhibiting.

What happened to the boot device on the hd?
There should be another -s x:0, ahci-hd drive that it boots from.
	-s 4:0,ahci-hd,${vm_dir}/${vmname}/disk0.img


> [1] https://svnweb.freebsd.org/base/head/stand/efi/libefi/efipart.c?view=markup#l232
> [2] https://svnweb.freebsd.org/base/head/stand/efi/libefi/efipart.c?view=markup#l261
> [3] https://svnweb.freebsd.org/base/head/stand/efi/libefi/devpath.c?view=markup#l53
> 

-- 
Rod Grimes                                                 rgrimes at freebsd.org