Re: [Qemu-devel] [RFC 17/17] pseries: Default to POWER8 compatibility mode

2016-10-30 Thread David Gibson
On Sun, Oct 30, 2016 at 10:12:08PM +1100, David Gibson wrote: > Currently, the pseries machine defaults to running in the "raw" mode of > whatever the CPU version is - that is, without any compatibility options > enabled in the CPU. > > However, migration is only really safe in "raw" mode if sourc

[Qemu-devel] [RFC 17/17] pseries: Default to POWER8 compatibility mode

2016-10-30 Thread David Gibson
Currently, the pseries machine defaults to running in the "raw" mode of whatever the CPU version is - that is, without any compatibility options enabled in the CPU. However, migration is only really safe in "raw" mode if source and destination have exactly the same cpu model. Since HV KVM exposes