Re: FreeBSD and Coreboot

On Mon, May 27, 2019, 7:18 PM Nathan Whitehorn <nwhitehorn_at_freebsd.org>
wrote:

>
>
> On 2019-05-27 15:50, Eric McCorkle wrote:
> > On 5/27/19 5:53 PM, Edward Napierala wrote:
> >> On Mon, 27 May 2019 at 16:14, Eric McCorkle <eric_at_metricspace.net>
> wrote:
> >>
> >> [..]
> >>
> >>> My plan is roughly this:
> >>>
> >>> * Refurbish the GRUB port, get it working again in QEMU (possibly on
> one
> >>> of my machines), also possibly push a patch to GRUB to use the keybufs
> >>> mechanism to pass in GELI keys.
> >>>
> >>> * Get coreboot with GRUB/Seabios booting FreeBSD in QEMU
> >>>
> >>> * Possibly create a coreboot port (uncertain how this would work, since
> >>> Coreboot has its own extensive config menu)
> >>>
> >>> * Hold my breath and test it out on real hardware (I have a Librem 13
> r1
> >>> for this purpose)
> >>>
> >>> * Possibly try getting the FreeBSD kernel to work as a coreboot
> payload.
> >> Out of curiosity - why the kernel and not loader(8)?
> >>
> > If I understand coreboot correctly, loader would have to directly
> > manipulate devices _without a BIOS_.  That is, it would have to have an
> > entire device detection/interface layer, which I don't believe is the
> > case today.
> >
> > At least in the EFI case, loader is talking through the system's EFI
> > implementation, which takes care of all that for you.  BIOS works in a
> > similar way.  My sense is getting loader to the point where it could be
> > a coreboot (without Seabios/GRUB/Tianocore) would be quite an
> undertaking.
> >
>
> On IBM PowerNV systems, which also don't provide interfaces to a
> second-stage loader, we just abandoned loader(8). It's way too much work.
>

How do you use tunables and loadable modules?

Warner

>