TF-M includes platform/ext/cmsis, which is CMSIS v5.9.0 with some TF-M-specific changes.

Looking at the history for that directory, it seems that we periodically update it and have to re-apply the TF-M-specific changes (which looks to be the naming of the stack and the copy table size).

I’m wondering whether there’s a plan to either push the TF-M changes into upstream CMSIS or to change TF-M so that they’re not needed? It would be nice to just pull CMSIS from upstream like we do with other external libraries…

Chris Brand

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