Re: [Qemu-devel] [RFC] darwin: work around sigfd

[Alexander Graf]

On 05/08/2011 12:10 PM, Andreas Färber wrote:
> Alex,
>
> Am 08.05.2011 um 11:15 schrieb Andreas Färber:
>
> > Am 05.05.2011 um 15:15 schrieb Alexander Graf:
> >
> > > On 05.05.2011, at 14:56, Paolo Bonzini wrote:
> > >
> > > > On 05/05/2011 11:36 AM, Alexander Graf wrote:
> > > > > When running qemu-system on Darwin, the vcpu processes guest code, 
> > > > > but
> > > > > I don't get to see anything on the cocoa screen.
> > > >
> > > > Out of curiosity, does it work with iothread?
> > >
> > > Seems to work with -nographic, yes. With cocoa it doesn't seem as 
> > > happy :o. It certainly gets a lot further than without.
> >
> > -nographic has issues with --enable-io-thread, too. It gets further 
> > than Cocoa though before it bails out.
>
> Actually, I'm still seeing issues with your patch as well. Might be 
> multiple independent issues that have cropped up?
>
> In particular I'm observing that AIX on qemu-system-ppc - as reported 
> by Kenneth - doesn't reach the point where it tells us the 32-bit CPU 
> is incompatible. With your patch it is now possible to exit the QEMU 
> process though.
>
> Any ppc64 guests don't even seem to enter OpenBIOS at all, whether 
> OpenBIOS/ppc or OpenBIOS/ppc64.
>
> It seems there is a DSI exception when turning on the MMU in OpenBIOS 
> (before any serial output occurs). Does that ring a bell with you, 
> some pSeries change maybe?

The pSeries changes did some cleanups to the MMU code, yes, but they 
looked pretty much sane to me. Are you running on a ppc64 host? Maybe 
there's some undefined corner case shifting happening :).


Alex