[SeaBIOS] SeaBIOS as EFI application

Thorsten Glaser tg at mirbsd.de
Wed Nov 7 15:20:29 CET 2012

Peter Stuge <peter <at> stuge.se> writes:

> mentions "In 2008, more x86-64 systems have adopted UEFI. While many
> of these systems still allow booting only the BIOS-based OSes via the
> Compatibility Support Module (CSM) (thus does not appear to the user
> that the system is UEFI-based)"

Ah okay. But what if the firmware doesn’t contain it, or it’s broken,
or disables it when Restricted Boot is enabled?

For that case, I’d prefer a somewhat same BIOS implementation (and
from talking with some people at several events and trying it, I
know SeaBIOS probably is one, for as much as you can use the words
sane and BIOS in the same sentence) on top of regular EFI, which can
then be loaded by the firmware or, if in Restricted Boot mode, by
OpenSuSE’s signed version of shim in its Physical Access Override
mode. And then, I can ship these two files with MirBSD.


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