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

Robin Murphy robin.murphy at arm.com
Tue Dec 7 04:48:13 PST 2021


On 2021-12-07 12:28, John Garry via iommu wrote:
> On 07/12/2021 12:04, Robin Murphy wrote:
>>>>
>>> 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? 
> 
> That should just be it.
> 
>> 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 :)
> 
> Tooling should be ok, but I would just like to see more of these JSONs 
> so any tooling issues can be ironed out.

Sounds good - Jean, Leo, is that something Linaro might like to pick up 
as part of the PMCG interest, or shall I make a note on my to-do list 
for the new year?

Thanks,
Robin.

> 
> Cheers,
> John
> 
> _______________________________________________
> iommu mailing list
> iommu at lists.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu



More information about the linux-arm-kernel mailing list