Re: [Qemu-ppc] [PATCH] target/ppc: Fix backwards migration of msr_mask

[Simon Guo]

David,
On Tue, Mar 20, 2018 at 01:23:19PM +1100, David Gibson wrote:
> 21b786f "PowerPC: Add TS bits into msr_mask" added the transaction states
> to msr_mask for recent POWER CPUs to allow correct migration of machines
> that are in certain interim transactional memory states.
> 
> This was correct, but unfortunately breaks backwards of pseries-2.7 and
> earlier machine types which (stupidly) transferred the msr_mask in the
> migration stream and failed if it wasn't equal on each end.
> 
> This works around the problem by masking out the new MSR bits in the
> compatibility code to send the msr_mask on old machine types.
> 
> Signed-off-by: David Gibson <address@hidden>

Sorry I didn't consider the backward compatibility in previous
commit. Thanks for fix that.

Thanks,
- Simon