[PATCH v7 1/2] powerpc: Detect the presence of big-cores via "ibm,thread-groups"

[Srikar Dronamraju]

* Gautham R. Shenoy <ego at linux.vnet.ibm.com> [2018-08-20 11:11:43]:

> From: "Gautham R. Shenoy" <ego at linux.vnet.ibm.com>
> 
> On IBM POWER9, the device tree exposes a property array identifed by
one small nit:
s/identifed/identified/g

> "ibm,thread-groups" which will indicate which groups of threads share
> a particular set of resources.
> 
> As of today we only have one form of grouping identifying the group of
> threads in the core that share the L1 cache, translation cache and
> instruction data flow.
> 
> This patch defines the helper function to parse the contents of
> "ibm,thread-groups" and a new structure to contain the parsed output.
> 
> The patch also creates the sysfs file named "small_core_siblings" that
> returns the physical ids of the threads in the core that share the L1
> cache, translation cache and instruction data flow.
> 
> Signed-off-by: Gautham R. Shenoy <ego at linux.vnet.ibm.com>

Otherwise looks good to me.

Reviewed-by: Srikar Dronamraju <srikar at linux.vnet.ibm.com>