OP-TEE “Hello World” Example Fails on Jetson Orin Nano

Issue Overview

Users are experiencing difficulties running the OP-TEE "Hello World" example program on the Nvidia Jetson Orin Nano development board. The specific error encountered is "0xffff0008 code 0x3" when attempting to open a session with the Trusted Execution Environment (TEE). This error occurs despite following the OP-TEE documentation build steps correctly and making multiple attempts to build the program.

The issue appears to be related to the interaction between the OP-TEE client and the TEE itself, as the error code 0x3 suggests that the problem originates from the TEE Client API. This prevents users from successfully running the example program and potentially hinders their ability to develop and test secure applications on the Jetson Orin Nano platform.

Possible Causes

1. Incompatible OP-TEE version: The installed version of OP-TEE may not be fully compatible with the Jetson Orin Nano hardware or software environment.

2. Incorrect build configuration: Despite following the documentation, there might be subtle configuration issues specific to the Jetson Orin Nano that are not addressed in the general OP-TEE build instructions.

3. TEE initialization failure: The Trusted Execution Environment may not be properly initialized on the Jetson Orin Nano, leading to communication errors with the client.

4. Missing or outdated drivers: The necessary drivers for TEE communication on the Jetson Orin Nano may be missing, outdated, or improperly configured.

5. Hardware-specific issues: There could be hardware-specific compatibility issues between the Jetson Orin Nano and the OP-TEE implementation.

6. Security configuration: The security settings on the Jetson Orin Nano may be preventing the OP-TEE client from establishing a connection with the TEE.

Troubleshooting Steps, Solutions & Fixes

1. Verify OP-TEE compatibility:

   • Check the OP-TEE documentation for specific requirements or known issues with the Jetson Orin Nano.
   • Ensure you are using the latest stable version of OP-TEE that is compatible with your Jetson Orin Nano’s software stack.

2. Review build process:

   • Double-check each step of the build process, paying close attention to any Jetson Orin Nano-specific instructions.
   • Verify that all dependencies are correctly installed and up to date.

3. Examine TEE initialization:

   • Check system logs for any errors related to TEE initialization during boot.
   • Ensure that the TEE is properly enabled in the device tree or boot configuration.

4. Update and verify drivers:

   • Update the Jetson Orin Nano to the latest NVIDIA JetPack version, which includes updated drivers and firmware.
   • Verify that all necessary TEE-related drivers are loaded using the lsmod command.

5. Consult Jetson developer resources:

   • Review the Jetson developer guide for any specific instructions on setting up OP-TEE or working with the TEE.
   • Check NVIDIA’s developer forums for similar issues and potential solutions.

6. Analyze security settings:

   • Review the security configuration of your Jetson Orin Nano, particularly any settings related to secure boot or TEE access.
   • Temporarily disable secure boot (if applicable) to test if it resolves the issue, but remember to re-enable it for production use.

7. Use a known working example:

   • Refer to the hello_world sample application in the OP-TEE GitHub repository for a working example.
   • Compare your implementation with the sample to identify any discrepancies.

8. Gather additional information:

   • Use the tee-supplicant tool to gather more detailed error information.
   • Run the command with verbose logging enabled: tee-supplicant -d

9. Check for hardware-specific patches:

   • Look for any Jetson Orin Nano-specific patches or workarounds in the OP-TEE community forums or NVIDIA developer resources.

10. Reach out to NVIDIA support:

    • If the issue persists, consider opening a support ticket with NVIDIA, providing detailed information about the error and the steps you’ve taken to troubleshoot.

Remember to document any changes made during the troubleshooting process and their effects on the system. If you find a solution, consider sharing it with the OP-TEE and NVIDIA Jetson communities to help others who may encounter similar issues.