Transaction cost between secure world and normal world

Hello, I was wondering how is the cost/ slow-down of communication between secure world and normal world. How many CPU cycles on average? Thank you.
Secure world entry request by normal world application

For a TrustZone enabled processor, what if a normal world application (e.g. 3rd party application) directly uses SMC instruction to request a secure world entry? In a typical case, it it a responsibility...
Transaction cost between secure world and normal world

Hello, I was wondering how is the cost/ slow-down of communication between secure world and normal world. How many CPU cycles on average? Thank you.
Secure world entry request by normal world application

For a TrustZone enabled processor, what if a normal world application (e.g. 3rd party application) directly uses SMC instruction to request a secure world entry? In a typical case, it it a responsibility...
[A-profile] Is it possible to invalidate secure physical addresses from the normal world?

Suppose code running in the non-secure state wants to invalidate secure address 0x8000. Does the AArch64 instruction set support this? Assume a system where secure and non-secure memory are in the same...