Re: [Qemu-devel] [PATCH 12/13] Add zipl bootloader interpreter

From: Mark Williamson <maw48@cantab.net>
To: qemu-devel@nongnu.org
Cc: Carsten Otte <cotte@de.ibm.com>,
	Aurelien Jarno <aurelien@aurel32.net>,
	Alexander Graf <agraf@suse.de>
Subject: Re: [Qemu-devel] [PATCH 12/13] Add zipl bootloader interpreter
Date: Tue, 24 Nov 2009 20:39:55 +0000	[thread overview]
Message-ID: <200911242039.55345.maw48@cantab.net> (raw)
In-Reply-To: <E34E449C-BB40-4AF7-847F-C6F38CB83DAE@suse.de>

> > Can't you just use kboot?
> >
> > Use a kernel loader to load the kboot module/initrd, include kboot as our
> > firmware, then let kboot do the magic to launch the real linux kernel
> > from disk.
> 
> Hm, so we'd have to rely on kexec working properly? I've seen how badly
>  that turned out on the PS3. I guess I'd rather write a virtio
>  implementation :-).

Way back in the mists of time (uh, something like that 2004-05) I had some 
discussions with some of the S390 people about using kboot for more flexible 
boot, since it tallied with their interests.  Although at that point I had the 
impression that zipl was restricted to only one boot option anyhow, so if it 
can now choose from a list then maybe they just enhanced what they had.

Anthony, you might remember these discussions?  I don't know if they went 
anywhere with it.

Cheers,
Mark