On 2021-12-07 09:14, John Garry wrote:
On 17/11/2021 14:48, Jean-Philippe Brucker wrote:
From: Robin Murphy<robin.murphy@xxxxxxx>
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.
