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Date: Wed, 23 Mar 2011 22:53:57 +0000
Message-ID: <AANLkTikUXdXa2YF0kmtoyL-5ETO2ok8WVQfkOh56ctRT@mail.gmail.com>
Subject: Re: [Qemu-devel] Re: [0/27] Implement emulation of pSeries logical
	partitions (v4)
From: Peter Maydell <peter.maydell@linaro.org>
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To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: qemu-devel@nongnu.org, paulus@samba.org, Alexander Graf <agraf@suse.de>, David Gibson <david@gibson.dropbear.id.au>

On 23 March 2011 22:43, Benjamin Herrenschmidt <benh@kernel.crashing.org> w=
rote:
> On Thu, 2011-03-24 at 01:51 +1100, David Gibson wrote:
>> Ah, you probably need to increase the amount of memory given to the
>> guest. =C2=A0The SLOF image, certainly, won't work with the qemu default
>> memory size. =C2=A0Try -m 512.
>
> Ah good point, forgot about that. SLOF has a minimum of 256M due to the
> way we do the memory layout. We haven't quite figured out yet how to
> have qemu just default to that for -M pseries.

You could add a min_ram field to QEMUMachine along the lines
of the max_ram patch I submitted earlier this week:
 http://patchwork.ozlabs.org/patch/87807/
and then have vl.c clamp the default RAM size to be at least
the minimum.

(I actually thought about implementing that in the patch but
I didn't have a use case for it at the time...)

-- PMM