[PSA] can direct resources be attached to constant entries in an immutable P4 table?

[antoninbas]

I imagine it may be useful to be able to attach a direct counter to immutable entries, but is this something we want to require for PSA? I couldn't find anything in the PSA spec about this, but I may have missed it.

[jafingerhut]

I am not aware of this issue being raised when discussing PSA, so not surprising if there is nothing in the spec about it.

A counter sounds like something that could be wanted in some cases, but I don't have a feeling for "very important" vs. "sounds reasonable".

Same question for direct meters, too, I guess?

[cc10512]

Any direct resources then?

[jafingerhut]

It seems safe to add something to PSA saying that this combination need not be supported by PSA implementions, with the current version of PSA. We can consider requiring support for that and perhaps other combinations in a future PSA version if there is interest.

[antoninbas]

Sounds good to me. I will add to the P4Runtime spec that direct resources are not supported for immutable tables.