Hi, experts, We are currently moving optee to a 36bit address to boot with environment that hafnium runs at sel2 as spmc and optee runs at sel1 as sp. Now we have moved hafnium to 0x880000000 and run successfully. Then we tried moving optee to a 36bit address (0x89000000) as well. Although hafnium and optee were successfully initialized on the primary cpu, psci_cpu_on does not seem to be entered into when the secondary cpu is started. The error is as follows: https://github.com/OP-TEE/optee_os/issues/5895 <https://github.com/OP-TEE/optee_os/issues/5895 > Is there any difference between the two cases where hafnium and optee initialize the secondary cpu with different load_address? The log print shows that the secondary cpu has not entered hafnium. Could Hafnium be affected by the 36bit address when dealing with psci related transactions? Regards, Yuye.