Re: [Qemu-ppc] MTTCG for ppc64 (removed from ppc-for-2.10)

[Cédric Le Goater]

On 04/19/2017 05:55 AM, David Gibson wrote:
> Hi all,
> 
> I'm afraid I've pulled the MTTCG enablement patches for target/ppc64
> out of my ppc-for-2.10 tree, since I discovered it was causing a
> repeatable failure on one of the Travis builds.
> 
> Specifically, with both the LL/SC in terms of cmpxchg and
> enable-mttcg-by-default patches applied, and qemu build with clang,
> then make check will fail with a tcg_abort() in the powernv
> boot-serial test.
> 
> I don't know if this is an mttcg bug or a clang bug, but either way,
> I'm moving these patches to a separate mttcg branch until we can sort
> it out.
> 

Alex also spotted a few areas where ppc would need some more 
improvements to support MTTCG (revealed by skiboot) See discussion 
here :

https://lists.gnu.org/archive/html/qemu-devel/2017-04/msg01903.html

I haven't had time to look at these yet.

Thanks,

C.