How to setup configuration without dedicate cores for OPTEE.

[gurisong]

Hi experts,

I want to know how to setup configuration without dedicate cores for OPTEE. If possible, I want to know if there are any problems or issues.

Thanks

[jenswi-linaro]

Do you mean that you want to prevent OP-TEE from running on some cores? If you can allow OP-TEE to still initialize the secure state of the CPU it's a normal-world problem only, unless you've configured secure interrupts to be delivered to CPUs that aren't supposed to be used by OP-TEE. If you don't want OP-TEE to touch the CPUs at all, then you will need to deal with that in TF-A so it doesn't try to enter OP-TEE with those CPUs.

[gurisong]

We are considering a 2-core system and we want OP-TEE to work without any performance issues on both cores, without a dedicated core. would you please let me know how to setup it for this.

[jenswi-linaro]

We are considering a 2-core system and we want OP-TEE to work without any performance issues on both cores, without a dedicated core. would you please let me know how to setup it for this.

That's the default configuration, so it should already work as you expect it.