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

[Kevin Wolf]

Rene Rebe schrieb:
> Hi,
> 
> Kevin Wolf wrote:
>> Rene Rebe schrieb:
>>> 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).
>>
>> The memory map doesn't seem to work. It's all zeros for me (haven't
>> looked for the reason yet) and that kills my kernel. When I disable the
>> memory map part, the kernel seems to boot correctly and it sees all the
>> modules with the right command lines.
>>
>> Once these basic things work, another nice feature would be gzip
>> support. It took me some minutes until I realized that I tried to feed
>> it a gzipped kernel which didn't work, of course.
> 
> I think I noticed the same with the GRUB example kernel. I'll
> take a look at some later hour.
> 
> Is your kernel something you can share for testing?

Sure. I tried it with with several homebrew kernels from
http://lowlevel.brainsware.org/wiki/index.php/Kategorie:Betriebssystem
(page is in German) - to be precise it was tyndur, meinOS, Xantorix and
lightOS. Links to the sources and/or binaries for each one are in the
respective Wiki articles.

I could also send you a tarball with all of them off-list if you like.

Kevin