[Trusted-services] How to run trusted services under Hafnium, without OP-TEE

Hi experts: I want to run S-EL0 trusted services under S-EL2 Hafnium, without S-EL1 OP-TEE, in FVP simulation.

I see totalcompute project integrates trusted-service with architecture, that S-EL0 can run under S-EL2, as here: https://totalcompute.docs.arm.com/en/latest/totalcompute/tc2/tc2_sw_stack.ht...

However, trusted-service documents only describe S-EL0 examples running under S-EL1 OP-TEE https://trusted-services.readthedocs.io/en/v1.0.0-beta/quickstart/optee-test... https://trusted-services.readthedocs.io/en/v1.0.0-beta/environments/secure-p...

Anyone can help?