Re: [Qemu-devel] [PATCHv3 4/4] ppc: Rework CPU compatibility testing across migration

2017-05-29 Thread Greg Kurz
On Fri, 26 May 2017 14:16:30 +1000 David Gibson wrote: > On Thu, May 04, 2017 at 12:07:47PM +0200, Greg Kurz wrote: > > On Thu, 27 Apr 2017 17:28:43 +1000 > > David Gibson wrote: > > > > > Migrating between different CPU versions is a bit complicated for ppc. > > > A long time ago, we ensured

Re: [Qemu-devel] [PATCHv3 4/4] ppc: Rework CPU compatibility testing across migration

2017-05-25 Thread David Gibson
On Thu, May 04, 2017 at 12:07:47PM +0200, Greg Kurz wrote: > On Thu, 27 Apr 2017 17:28:43 +1000 > David Gibson wrote: > > > Migrating between different CPU versions is a bit complicated for ppc. > > A long time ago, we ensured identical CPU versions at either end by > > checking the PVR had the s

Re: [Qemu-devel] [PATCHv3 4/4] ppc: Rework CPU compatibility testing across migration

2017-05-25 Thread David Gibson
On Thu, Apr 27, 2017 at 02:51:31PM -0500, Michael Roth wrote: > Quoting David Gibson (2017-04-27 02:28:43) > > Migrating between different CPU versions is a bit complicated for ppc. > > A long time ago, we ensured identical CPU versions at either end by > > checking the PVR had the same value. How

Re: [Qemu-devel] [PATCHv3 4/4] ppc: Rework CPU compatibility testing across migration

2017-05-04 Thread Greg Kurz
On Thu, 27 Apr 2017 17:28:43 +1000 David Gibson wrote: > Migrating between different CPU versions is a bit complicated for ppc. > A long time ago, we ensured identical CPU versions at either end by > checking the PVR had the same value. However, this breaks under KVM > HV, because we always have

Re: [Qemu-devel] [PATCHv3 4/4] ppc: Rework CPU compatibility testing across migration

2017-04-30 Thread David Gibson
On Thu, Apr 27, 2017 at 02:51:31PM -0500, Michael Roth wrote: > Quoting David Gibson (2017-04-27 02:28:43) > > Migrating between different CPU versions is a bit complicated for ppc. > > A long time ago, we ensured identical CPU versions at either end by > > checking the PVR had the same value. How

Re: [Qemu-devel] [PATCHv3 4/4] ppc: Rework CPU compatibility testing across migration

2017-04-27 Thread Michael Roth
Quoting David Gibson (2017-04-27 02:28:43) > Migrating between different CPU versions is a bit complicated for ppc. > A long time ago, we ensured identical CPU versions at either end by > checking the PVR had the same value. However, this breaks under KVM > HV, because we always have to use the ho

[Qemu-devel] [PATCHv3 4/4] ppc: Rework CPU compatibility testing across migration

2017-04-27 Thread David Gibson
Migrating between different CPU versions is a bit complicated for ppc. A long time ago, we ensured identical CPU versions at either end by checking the PVR had the same value. However, this breaks under KVM HV, because we always have to use the host's PVR - it's not virtualized. That would mean w