[OpenBIOS] openfirmware boot partition layout

[Andreas Färber]

Am 16.02.2011 um 16:06 schrieb Dinar Valeev:

> On Wed, Feb 16, 2011 at 3:53 PM, Mark Cave-Ayland
> <mark.cave-ayland at siriusit.co.uk> 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

And you're sure you disabled the default iso9660 driver? It was  
reported non-working, cf.
http://repo.or.cz/w/openbios/afaerber.git/commitdiff/072a920ae2f506f6c02c109b6a012ec8eb2f9668

Andreas