[SeaBIOS] SeaBIOS as EFI application

Paolo Bonzini pbonzini at redhat.com
Sat Nov 10 00:41:15 CET 2012

Il 09/11/2012 12:01, Thorsten Glaser ha scritto:
> Paolo Bonzini <pbonzini <at> redhat.com> writes:
>> See http://www.linux-kvm.org/page/OVMF too.
> “The UEFI applications before the last layer correctly use the OVMF GOP 
> (graphics output protocol), which drives the emulated Cirrus 5446 video card. 
> Unfortunately, the last layer (WinPE) has a hard dependency on VGA BIOS 
> interrupt 0x10, which is not provided by any OVMF CSM (compatibility support 
> module) as of now.”
> This (in the “Windows Server 2008 R2 SP1” section) is another reason why 
> people need a SeaBIOS for EFI ;-)

You really only need to run the POST routine of the VGA option ROM.
Problem is simply that as things stand, UEFI only does that if you have
a CSM like SeaBIOS could be.


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