[PATCH v2 3/3] perf/smmuv3: Synthesize IIDR from CoreSight ID registers

[Robin Murphy]

On 2021-12-07 09:14, John Garry wrote:
> On 17/11/2021 14:48, Jean-Philippe Brucker wrote:
>> From: Robin Murphy<robin.murphy at arm.com>
>>
>> The SMMU_PMCG_IIDR register was not present in older revisions of the
>> Arm SMMUv3 spec. On Arm Ltd. implementations, the IIDR value consists of
>> fields from several PIDR registers, allowing us to present a
>> standardized identifier to userspace.
>>
> So is there some userspace part to go with this now?

FWIW I've not looked into it - is it just a case of someone knocking out 
some JSON from the MMU-600/700 TRMs, or is there still mroe to do? I had 
the impression that *some* part of the process was stalled until 
implementations can start providing meaningful IIDRs, but I wasn't sure 
whether that was tooling or just data. I just work the low-level 
enablement angle :)

Robin.