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Re: [Qemu-ppc] [PATCH 01/58] spapr: proper qdevification

From: Paolo Bonzini
Subject: Re: [Qemu-ppc] [PATCH 01/58] spapr: proper qdevification
Date: Mon, 19 Sep 2011 08:50:38 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0.2) Gecko/20110906 Thunderbird/6.0.2

On 09/16/2011 04:08 PM, David Gibson wrote:
> > Well, now I'm confused.  I had a look at a pHyp machine, and Linux
> > seemed to see it as multiple targets on a single channel, but I'm sure
> > the PAPR spec says you shouldn't have that.  So I'm going to have to
> > look closer now.
>  If this is the case, there might be a bug in SLOF's probing of SCSI
>  devices.

Um.. I'm confused.  This is a pHyp (aka PowerVM) machine, so there is
no SLOF.  What I'm seeing there seems to contradict the PAPR spec
which is supposed to describe it.  So I don't see how it has a bearing
on SLOF addressing.

I meant "if we want to make QEMU present devices like pHyp, we cannot do that without fixing SLOF".

>  (2) move the devices so that both SLOF and Linux see them as x:0:0
>  (one target per channel).  This would be inconsistent with pHyp, but
>  it doesn't break either SLOF or Linux.

(2) sounds like what PAPR describes to me, so that sounds fine to me.

No, PAPR describes one target per *host*, not channel.


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