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 ...

This is happen for every secure to non secure transition in Armv8-A .

Please Guide if you know why this happen?

Thank you in advance.

Regards

Sanjay Kumar

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