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Re: [Qemu-devel] [Qemu-ppc] [PATCH 01/10] ppc: Fix rfi/rfid/hrfi/... emu

From: David Gibson
Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH 01/10] ppc: Fix rfi/rfid/hrfi/... emulation
Date: Mon, 20 Jun 2016 12:19:02 +1000
User-agent: Mutt/1.6.1 (2016-04-27)

On Mon, Jun 20, 2016 at 07:12:38AM +1000, Benjamin Herrenschmidt wrote:
> On Sun, 2016-06-19 at 19:23 +0200, Cédric Le Goater wrote:
> > > You can run a 32-bit OS or firmware on ppc64, but it needs to know that
> > > it's running on a 64-bit chip and do a few things differently.
> > 
> > yes sure but qemu would still allow rfi under 64bit CPUs, that is what 
> > I was concerned about. Is that ok ? 
> Why ? A real CPU won't allow it, why should we ?

We shouldn't.  However, I'm inclined to in for now, until we have an
OpenBIOS fix actually committed.  I'd prefer to keep the existing
setup sorta-working when the current situation is unlikely to break
working code, even though it's definitely wrong.

BenH or Cédric, if you want to resend the hrfi fix patch with the
64-bit rfi support left in for no, that would be good.

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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