Hikey960 AOSP: How to build the optee_examples host only?

[SimonWan]

Hi there,

I boot up my hikey960 with AOSP+OPTEE as the instructions here: https://optee.readthedocs.io/building/aosp/aosp.html?highlight=aosp.

Now I’m trying to rewrite some host code in external/optee_examples while I’m wondering how can I build the host without building the whole system?

Thank you.

[jbech-linaro]

IIRC, you should be able to just cd into the folder and run mm (or maybe even mmm). With those, it will only rebuild the module + dependencies (mm) or just rebuild the module mmm.

[vchong]

@SimonWan If you're using the script, you can also try below from the root of your AOSP source tree:

./build.sh -v p -t hikey960 <name of host>

# e.g.
./build.sh -v p -t hikey960 optee_example_hello_world

# push to board
adb push out/target/product/hikey/vendor/bin/optee_example_hello_world vendor/bin

Note that this requires you to have built (or at least downloaded, i.e. repo sync-ed) the source tree first, which you did. We don't support out-of-tree building.

[vchong]

Please also note that the hikey960 build isn't very stable, i.e. adb over usb and wifi issues, so use at your own discretion!

[vchong]

If required, you can also rebuild the TAs using the command above, replacing <name of host> with <uuid.ta>, e.g. 8aaaf200-2450-11e4-abe2-0002a5d5c51b.ta.

[vchong]

Ah sorry, I just realized that since adb over usb has issues in hikey960, you can't adb push if you can't get adb over tcp to work, so you might end up having to rebuild the image anyway: ./build.sh -v p -t hikey960 vendorimage

[SimonWan]

@jbech-linaro @vchong thank you for the answers. @vchong thank you for the reminder, but 960 can still support the adb over wifi pretty stable so far so I the file replacement is easier for my case. Have a good one.