Trusted Applications on Juno

These instructions demonstrate how to run an OP-TEE "Hello, world!" Trusted Application (TA) on Juno.

  1. Follow the instructions here to sync a new workspace using the `ack-armlt' kernel: 
    +-------------+----------------------------+
| Workspace   | <workspace>                |
| Platform    | Juno                       |
| Build       | Build from source          |
| Environment | Linux/Android              |
| Kernel      | ack-4.9-armlt              |
| Filesystem  | OpenEmbedded Minimal 15.09 |
+-------------+----------------------------+
  2. Build the deliverables
  3. Burn the OpenEmbedded Minimal filesystem image to a USB stick and insert the USB stick into the Juno
  4. Wipe the Juno board's Flash: 
    Cmd> flash
Flash> eraseall
Flash> quit
Cmd> usb_on
  5. Delete everything on the Juno's mounted MMC card
  6. Copy the contents of `<workspace>/recovery/' to the Juno's mounted MMC card
  7. Copy the contents of `<workspace>/output/juno/juno-oe/uboot' to the `/SOFTWARE/' directory on the Juno's mounted MMC card, overwriting any duplicate files
  8. Issue a `$ sync' command from your host PC
  9. Power cycle the Juno board; it should boot to the OpenEmbedded prompt
  10. Get the Juno board's IP address using `# ifconfig'
  11. Using full absolute paths, export the following environment variables on your host PC: 
    $ export JUNO_IP=<juno_ip_address>
$ export HOST_CROSS_COMPILE=<workspace>/tools/gcc/gcc-linaro-5.3.1-2016.05-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-
$ export TA_CROSS_COMPILE=<workspace>/tools/gcc/gcc-linaro-5.3.1-2016.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-
$ export TEEC_EXPORT=<workspace>/optee/optee_client/out/export
$ export TA_DEV_KIT_DIR=<workspace>/optee/optee_os/out/arm-plat-vexpress/export-ta_arm32/

    Note: Replace `5.3.1-2016.05' with the correct release and date for your workspace.

  12. Build the Trusted Application: 
    $ cd <workspace>/optee/
$ git clone https://github.com/jenswi-linaro/lcu14_optee_hello_world.git
$ cd lcu14_optee_hello_world/
$ make
  13. Copy required files to the Juno: 
    $ scp host/hello_world root@$JUNO_IP:~
$ find -name "*.ta" -exec scp {} root@$JUNO_IP:~ \;
$ cd <workspace>/optee/optee_client/out
$ tar zcf export.tar.gz export/
$ scp export.tar.gz root@$JUNO_IP:~
  14. Run the TA on the Juno: 
    # cd ~
# mkdir -p /lib/optee_armtz/
# mv *.ta /lib/optee_armtz/
# tar xzf export.tar.gz
# export LD_LIBRARY_PATH=~/export/lib:$LD_LIBRARY_PATH
# ./export/bin/tee-supplicant &
# ./hello_world
Invoking TA to increment 42
TA incremented value to 43
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