On Wed, Aug 25, 2021 at 11:34:45PM +0200, Mark Kettenis wrote:
> > From: Peter Robinson <pbrobinson@gmail.com>
> > Date: Wed, 25 Aug 2021 14:29:45 +0100
> > 
> > > > Exactly. Keep in mind that RISC-V is looking into EBBR as well,
> > > > so this is far from an 'Arm thing'. Moreover, the efi stub side
> > > > of the kernel for risc-v, will only load an initrd using the
> > > > EFI_LOAD_FILE2 protocol we added support for. So right now the
> > > > only way to properly boot a RISC-V with EFI is through the
> > > > manager.
> > >
> > > I had heard that RISC-V was just going to use UEFI (and not U-Boot),
> > > but perhaps that is not correct. So far I have not really done
> > > anything with RISC-V so am not familiar with it.
> > 
> > My understanding is the intention is to just use UEFI of which U-Boot
> > has a UEFI implementation.
> 
> The HiFive Unmatched ships with U-Boot.  I'm booting OpenBSD via UEFI
> on that board by using the uSD card that came with the board.
> 
> The folks pushing the spec for RISC-V server hardware are probably
> considering a more traditional UEFI implementation for those systems
> since they also seem to be pushing for ACPI.  But they explicitly
> mention EBBR for "embedded" systems, and EBBR was deliberately
> designed to allow the implementation of compliant systems using
> U-Boot's UEFI implementation.

I don't know if any of the "right" people are listening here, but, I
don't see why ACPI precludes U-Boot.  We ship ACPI tables for x86
already...

-- 
Tom