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[Qemu-devel] Re: [0/27] Implement emulation of pSeries logical partition

From: David Gibson
Subject: [Qemu-devel] Re: [0/27] Implement emulation of pSeries logical partitions (v4)
Date: Thu, 24 Mar 2011 10:46:37 +1100
User-agent: Mutt/1.5.20 (2009-06-14)

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, this is very odd.  I use the command line below routinely...

./ppc64-softmmu/qemu-system-ppc64 -nographic -M pseries -m 512 rhel6-root.img

David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!

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