[Qemu-devel] Re: [0/27] Implement emulation of pSeries logical partitions (v4)

[Alexander Graf]

On 24.03.2011, at 05:41, David Gibson wrote:

> On Wed, Mar 23, 2011 at 10:29:04PM +0100, Alexander Graf wrote:
>> 
>> On 23.03.2011, at 22:08, Benjamin Herrenschmidt wrote:
>> 
>>> On Wed, 2011-03-23 at 15:45 +0100, Alexander Graf wrote:
>>>> 
>>>> What's the magic to start a guest? I tried passing a disk which SLOF
>>>> didn't detect (obviously - there's no IDE there). I also tried running
>>>> a kernel directly with -kernel which gave me no output. How are you
>>>> usually running your images? 
>>> 
>>> hrm... you using -M pseries right ?
>> 
>> Yup
>> 
>>> so -kernel should work with a kernel that is compiled for the pseries
>>> platform (and it won't use SLOF).
>> 
>> Yeah, that part works.
>> 
>>> 
>>> a disk should work with SLOF if you use the default which is scsi (ie
>>> pseries machine sets that flag that tells qemu to default to scsi, which
>>> is then picked up by our vscsi).
>>> 
>>> IE. You should be able to stick a distro ISO in the virtual CD-ROM and
>>> boot from that with SLOF. SLOF will read the qemu boot list (tho it only
>>> knows about "c", "d" and "n" at that stage) and try them in order.
>> 
>> That one doesn't. If I just pass in a disk w/o specifically saying
>> it's a scsi disk I end up with no hard disk in the guest :).
> 
> Um.. what exact command line are you using?  For me, both -hda <file>
> and a bare <file> on the command line work...

Ah, yes. It's the amount of RAM. I didn't pass in -m before which made SLOF not 
detect the SCSI adapter but crash before that.
So yes, please add a min_ram field.


Alex