Adding optional CPUID field in microarchitecture schema and in json file for Arm architectures

[paolotricerri]

As part of archspec/archspec#168 on the archspec repo, it was decided to add, where it made sense for ARM cores a new field, called cpuid rather than adding a new submodule just for that.

These changes aim at:

• adding the optional field in the microarchitecture_schema file
• introducing the field "cpuid" in the ARM microarchitectures

This field will be used in the cpu/detect.py file in the archspec repo, for which a separate PR will be opened.

CC: @dslarm

[paolotricerri]

Sorry, didn't realise I had not tagged @alalazo in the review.

Thanks
P

[alalazo]

Let's work on this one first, to get the detection based on cpuid/cpupart working. Then we can add neoverse_n2 and deprecate the neoverse_v2 optional features.

[alalazo]

We already have the vendor field above, which if I understand correctly covers for the first part of the cpuid information (there's a mapping below in the file to go from hex code to vendor name). The second part seems to be the cpupart, i.e. 0xd0c. If that's the case, can we just add that?

[paolotricerri]

You are right. I have replaced cpuid with cpupart and removed the cpu implementer part from the string.

In the archspec repo, I'll apply the changes to deal with the cpupart field from the json.

[paolotricerri]

Hi @alalazo , I have pushed on this branch, the introduction of cpupart instead of cpuid as per above and kept the field optional.

[alalazo]

Thanks