Re: [Qemu-devel] [PATCH] Add multi-boot kernel loading support

[Rene Rebe <rene@exactcode.de>]

Paul Brook wrote:
> On Monday 02 February 2009, Rene Rebe wrote:
>> Hi all,
>>
>> Alexander Graf implemented multi-boot kernel loading during
>> his work to run Darwin inside Qemu/KVM. As the boot loader
>> expects to load the kernel in an EFI environment a custom
>> booter is used to load the kernel using a legacy BIOS.
>>
>> This is a port of the patch to the new extload / INT 19
>> machinery (including minor cleanups).
> 
> This is introducing quite a lot of nontrivial target code in a hard to 
> understand and maintain way. This seems like a bad idea.
> 
> I suspect it would be better to implement this as an actual boot rom, and have 
> it read arguments from the firmware device. Ideally the same rom would also 
> cover the linux kernel case.

Hm. As I'm not yet memorized the Qemu code and and build system
maybe someone wants to shape the existing option rom code
in the way envisioned to base this patch series on?

Another option would also to apply (a cleaned up) version
of the patch as it is quite local and intrusive code and
someone else further re-factors it into an externally built
option rom?


Greetings,

-- 
   René Rebe - ExactCODE GmbH - Europe, Germany, Berlin
   http://exactcode.de | http://t2-project.org | http://rene.rebe.name