DRAM Encryption

By reading the documentation on the DRAM encryption Memory Encryption — Jetson Linux Developer Guide documentation, my questions are the following:

  1. which key is adopted to encrypt/decrypt the data in RAM?
  2. should I set these parameters in bootloader/tegra234-mb1-bct-misc-common.dtsi right?
  3. how can I test and see that the data are encrypted in RAM? can you suggest some tools to check the encrypted ram?

please see-also, Memory encryption of normal applications outside of TrustZone on Xavier NX - #13 by JerryChang

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