Cannot access EL1 resources from EL3 or secure world on armv8.

The working secerio is that I'm testing OP-TEE on a Hikey board(Cortex-A53, armv8), and they use arm-trusted-firmware(see https://github.com/linaro-swg/arm-trusted-firmware ) to be the monitor running...
Cannot access EL1 resources from EL3 or secure world on armv8.

The working secerio is that I'm testing OP-TEE on a Hikey board(Cortex-A53, armv8), and they use arm-trusted-firmware(see https://github.com/linaro-swg/arm-trusted-firmware ) to be the monitor running...
how to switch from EL3 to El1 inside u-boot before linux kernel?

linux requires EL1,however uboot is in EL3 mode.linux is halted.
how to switch from EL3 to El1 inside u-boot before linux kernel?

linux requires EL1,however uboot is in EL3 mode.linux is halted.
How to do from Secure(EL3) to Non-secure Exception level transition in ARMV8-A ?

Hi all i trying do transition from EL3 to EL2 exception ,but after ERET of EL3 mode it change the mode to EL2 , but as soon as when it will execute first instruction of EL2 , then It goes to Exception...