Re: [Qemu-ppc] [PULL 05/23] ppc: Enforce setting MSR:EE, IR and DR when MSR:PR is set

[Benjamin Herrenschmidt]

On Sat, 2016-07-09 at 01:43 +0100, Mark Cave-Ayland wrote:
> On 01/07/16 07:41, David Gibson wrote:
> 
> > From: Benjamin Herrenschmidt 
> > 
> > The architecture specifies that any instruction that sets MSR:PR will also
> > set MSR:EE, IR and DR.

 .../...

> Unfortunately this patch causes a regression and breaks booting OS 9 and
> OS X under qemu-system-ppc.

Any idea what is breaking specifically ? The architecture is pretty clear
here, could it be that they rely on old implementations allowing the
incorrect combination ?

Maybe we can make the restriction 64-bit server only...

Cheers,
Ben.