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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 20 Jun 2016 07:11:27 +1000
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Subject: Re: [Qemu-devel] [PATCH] ppc: Improve emulation of THRM registers
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To: G 3 <programmingkidx@gmail.com>, qemu-devel@nongnu.org

On Sun, 2016-06-19 at 11:09 -0400, G 3 wrote:
> =C2=A0 On 6/19/16 12:12 AM, qemu-devel-request@nongnu.org wrote:
> > Message: 5
> > Date: Sun, 19 Jun 2016 10:54:13 +1000
> > From: Benjamin Herrenschmidt<benh@kernel.crashing.org>
> > To:qemu-ppc@nongnu.org
> > Cc:qemu-devel@nongnu.org,david@gibson.dropbear.id.au, Mark
> > 	Cave-Ayland	<mark.cave-ayland@ilande.co.uk>, Alexander
> > Graf
> > 	<agraf@suse.de>
> > Subject: [Qemu-devel] [PATCH] ppc: Improve emulation of THRM
> > registers
> > Message-ID:<1466297653.24271.101.camel@kernel.crashing.org>
> > Content-Type: text/plain; charset=3D"UTF-8"
> >=20
> > The 75x and 74xx processors have some thermal monitoring SPRs that
> > some OSes such as MacOS do use. Our current "dumb" implementation
> > isn't good enough and will cause some versions of MacOS to hang
> > during
> > boot.
> >=20
> > This lifts an improved emulation from MacOnLinux and adapts it to
> > qemu, thus fixing the problem.
> >=20
> Which versions of the Mac OS hang?

The Apple CPU Plugin in 9.2.x afaik (well 9.2.2 for sure).

Cheers,
Ben.