How to Modify RME Register Values and the LEGACYTZEN Signal on Nvidia Jetson AGX Thor

Dear All, I am investigating whether the Arm V3AE CPU in the Nvidia AGX Thor supports the Realm Management Extension (RME).

Currently, the RME bit value for ID_AA64PFR0_EL1 on the AGX Thor is 0, indicating that RME is not supported.

According to the official documentation, this RME register value is related to the LEGACYTZEN hardware signal. I would like to know how to modify this signal. I have also raised this question with Arm. Since the hardware is still based on the Nvidia development board, I would appreciate your insights on this matter.

I received the following response from the Arm forum, so does Nvidia Jetson AGX Thor support it?

No, don’t see this info in relevant doc, don’t think this is supported.

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