[TF-M] psa_call performance

Hi,

Using isolation level 1 and IPC secure partition, I noticed psa_call() overhead for TFM v1.7 is significantly worse for than v1.1. Is this expected?

Assuming 1 invec and 0 outvec for the PSA call....

TF-M version

Psa_call() round trip cycles

v1.1

4038

v1.7

6051

Regards,

Brian Quach SimpleLink MCU Texas Instruments Inc.