Re: [OpenBIOS] openfirmware boot partition layout

[Dinar Valeev]

On Wed, Feb 16, 2011 at 3:53 PM, Mark Cave-Ayland
 wrote:
> On 16/02/11 13:23, Dinar Valeev wrote:
> > > Okay - first question to ask is this: which version of KVM and which SVN
> > > revision of OpenBIOS are you using? There has a been a lot of work in
> > > this
> > > area last year for example.
> >
> > I'm using kvm with 2.6.38-rc3-67365-g7a67422 kernel
> >
> > mine qemu version is:
> > QEMU emulator version 0.14.50, Copyright (c) 2003-2008 Fabrice Bellard
> >
> > I believe this is most recent version.
>
> Ooooh okay but since you're using ppc64, you're going to have to build from
> SVN trunk - the changes are that recent! BTW I thought the latest qemu/kvm
> version was 0.13.x, i.e. 0.14.x is still currently at RC stage at least in
> qemu world.

Will try to build svn version of openbios.
> > > Note that you can get more debugging output from OpenBIOS if you load up
> > > KVM
> > > with a couple of extra options on the command line: -nographic
> > > -prom-env='auto-boot?=false'. This will enable you to see the debug
> > > output,
> > > and also drops you to the Forth command prompt rather than trying to boot
> > > the device automatically.
> > >
> > > You can then try manually booting a PPC partition, e.g.
> > >
> > > boot cdrom:1
> > > boot disk:2
> > > boot
> > >
> > > etc.
> > >
> > > Or even browse some of the filesystem contents to see if the FS is
> > > recognised:
> > >
> > > dir cdrom:1\
> > > dir disk:2\
> >
> > My qemu command is:
> > ./ppc64-softmmu/qemu-system-ppc64 -enable-kvm -drive
> > file=/root/k0daz_ppc_lvm_appliance.ppc64-1.0.1.raw -cpu power4
> > -nographic -prom-env 'auto-boot?=false'
> >
> > Once I'm in OF prompt I've tried to invoke:
> > 0>  dir disk:1\ pc-parts: Unable to determine filesystem
> >  ok
>
> So that's easy - OpenBIOS can't work out what the filesystem on the
> partition is.

Just little finding.

So If I try to boot from iso without disk image attached then it boot's fine:
0 > dir cdrom:\suseboot\
      2048 2011-02-08 23:16:17 .\
      2048 2011-02-08 23:16:17 ..\
       154 2011-02-08 23:16:17 yaboot.cnf
    405028 2011-02-08 23:16:17 yaboot.ibm
 ok
0 > boot cdrom:\suseboot\yaboot.ibm
yaboot starting: loaded at 00040000 000657a8 (0/0/fff02464; sp: 07de7ff0)
Config file 'yaboot.cnf' read, 154 bytes

Welcome to yaboot version r22.8-r1190.SuSE

But if I boot with disk image attached Then it just hangs.
> > =============================================================
> > OpenBIOS 1.0 [Feb 9 2011 21:07]
> > Configuration device id QEMU version 1 machine id 3
> > CPUs: 1
> > Memory: 128M
> > UUID: 00000000-0000-0000-0000-000000000000
> > CPU type PowerPC,POWER4

Welcome to OpenBIOS v1.0 built on Feb 9 2011 21:07

0 > boot cdrom:\suseboot\yaboot.ibm
> > If I'm trying to boot VM with one you proposed. VM just hangs.
>
> Andreas' last email to the list was here:
> http://lists.openbios.org/pipermail/openbios/2011-February/006275.html. The
> short version is, the basic PPC64 BIOS works but if you need RTAS then
> currently developer help is needed. Would this be something you'd be willing
> to help with?

Unfortunately I have no programming skills. Just basics.

I'm glad to help with testing.
> ATB,
>
> Mark.
>
> Sirius Labs: http://www.siriusit.co.uk/labs