[PATCH 4/6] arm64: topology: Implement basic CPU topology support

[Hanjun Guo]

On 2013-12-12 18:27, Mark Brown wrote:
> On Thu, Dec 12, 2013 at 02:59:52PM +0800, Hanjun Guo wrote:
>> On 2013-12-11 22:24, Catalin Marinas wrote:
> 
>>> Lorenzo (on holiday now) pushed the DT topology bindings but there are
>>> no patches yet for reading them. I would much prefer to only describe
>>> the topology via DT rather than MPIDR (because hardware people sometimes
>>> have strange ideas).
> 
>> Topology code for ARM32 is based on MPIDR now, should we update it too with
>> describing the topology via DT?
> 
> Yes, the binding is supposed to apply to both so it'd be good to support
> it on pre-v8.  However using MPIDR should continue to be supported on
> pre-v8 as existing systems don't use the topology binding and so
> presumably have accurate MPIDRs, requiring the binding would be a
> regression for them.

Ah, that makes sense :)