System/uncore PMUs and unit aggregation

Leeder, Neil nleeder at
Tue Jan 10 16:46:49 PST 2017

On 1/10/2017 1:54 PM, Will Deacon wrote:
> Mark and I had a chat about this earlier today and I think we largely agree
> with you. That is, for composite PMUs with a notion of CPU affinity for
> their component units, it makes sense to use the event affinity as a means
> to address these units, rather than e.g. create separate PMU instances.
> However, for PMUs that don't have this notion of affinity, the units should
> either be exposed individually or, in the case that there is something like
> shared control logic, they should be addressed through the config fields
> (e.g. the hisilicon cache with the bank=NN option).
> I think this fits with your driver, so please post an updated version
> addressing Mark's unrelated review comments.
Thanks Will. I'll post a new patch which covers Marks's comments.

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