ARMv8-A Trap access of EL2 TTBR to EL3

Hi all,

I want to trap the non-secure access of several system registers (TTBR0_EL2, VTTBR_EL2, HCR_EL2, etc.) to EL3. However, when I look up the ARMv8-A reference manual, I cannot find some useful information. It seems that the ARMv8-A only supports trapping the access of EL1 TTBR registers to EL2 (with HCR_EL2), but not for EL3.

How can I do it?

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