Re: [Qemu-devel] [PATCH] spapr: Cleanup machine naming conventions, and prepare for 2.2 release

[Alexander Graf <agraf@suse.de>]

On 08.09.14 07:30, David Gibson wrote:
> As of qemu-2.1, spapr/pseries, has a set of versioned machine classes to
> represent the machine type as it appeared to the guest in different qemu
> versions.  This allows for safe migration of guests between current and
> future qemu versions.
> 
> However, these are organized a bit differently from those for PC: on PC,
> the default plain "pc" machine type is just an alias for the most recent
> versioned machine type.  In sPAPR, it names the base machine class from
> which the versioned types are derived.
> 
> The PC approach is preferable; it makes it clearer which explicit version
> is the current one.  Additionally updating the "current" machine as the
> base class makes it even more likely than otherwise to incorrectly alter
> the versioned machines' behaviour when updating the current machine.
> 
> Therefore this patch changes sPAPR to the PC approach - the base class
> becomes abstract, and plain "pseries" becomes an alias for the most
> recent versioned machine class.  Since qemu-2.1 is now released, we also
> create a new pseries-2.2 machine type, to incorporate changes during this
> development cycle (for now it is identical to pseries-2.1).
> 
> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

Thanks, applied to ppc-next.


Alex