OPTEE: xtest hang on Nitrogen6x

[Atomar25]

Trying to run xtest on Nitrogen6x :
https://boundarydevices.com/product/nitrogen6x-board-imx6-arm-cortex-a9-sbc/

Followed the steps from below page:

http://mrvan.github.io/optee-imx6q-sabresd

Where I am using mainline u-boot and kernel is
#Linux nitrogen6x 4.1.37 #4 SMP PREEMPT Tue Apr 3 13:10:44 IST 2018 armv7l GNU/Linux

I could see optee Linux driver has initialized from dmesg:

root@nitrogen6x:~# dmesg | grep optee
optee firmware:optee: probing for conduit method from DT.
optee firmware:optee: initialized driver
optee soc:firmware:optee: probing for conduit method from DT.
optee soc:firmware:optee: initialized driver

root@nitrogen6x:~# dmesg | grep psci
psci: probing for conduit method from DT.
psci: PSCIv0.2 detected in firmware.
psci: Using standard PSCI v0.2 function IDs

But, when I run xtest, I see it hangs on "* regression_1004 Test User Crypt TA"

root@nitrogen6x:# tee-supplicant &
[1] 576
root@nitrogen6x:# ERR [576] TEES:main:669: error tee_supp_fs_init

[1]+ Done(1) tee-supplicant
root@nitrogen6x:~# xtest
Run test suite with level=0

TEE test application started with device [(null)]
######################################################

regression

######################################################

• regression_1001 Core self tests
  regression_1001 OK

• regression_1002 PTA parameters
  regression_1002 OK

• regression_1003 Core internal read/write mutex
  Number of parallel threads: 6 (2 writers and 4 readers)
  Max read concurrency: 2
  Max read waiters: 2
  Mean read concurrency: 1.3375
  Mean read waiting: 1.0125
  regression_1003 OK

• regression_1004 Test User Crypt TA

It just hangs here and have to press ctrl+c to get the rootfs prompt again.

It looks to me OP-TEE runs out of memory but can anyone please confirm why I see it?

Thanks,
-Amit

[jforissier]

Please check that tee-supplicant has been started and is running.

[Atomar25]

Thanks for reply.

Looks like , it didn't start:
root@nitrogen6x:~# ps | grep "tee-supplicant"
609 root 2732 S grep tee-supplicant

But what is it, We are missing here ?

[jforissier]

Indeed tee-supplicant failed to start, it says "ERR [576] TEES:main:669: error tee_supp_fs_init" (I did not notice at first, sorry for that).
Check the code in this function and you should be able to understand what's wrong. Perhaps some configuration is incorrect.

[Atomar25]

Yeah, looked into tee_supp_fs_init function and it seems it expects /data/tee directory on rootfs.

After creating /data/tee on my rootfs, can see tee-supplicant has started and xtest runs without a hang.
but some of test cases failed.

is this /data/tee contains something specific ?(at the moment I have empty /data/tee on my rootfs)

[jforissier]

/data/tee can be empty initially. Which test fails?

[Atomar25]

Sorry, don't have the logs right now , I would share it tomorrow.

What exactly is the expectation from xtest, do it need all the test cases to be passed?

[jforissier]

What exactly is the expectation from xtest, do it need all the test cases to be passed?

Normally, yes.

[Atomar25]

Thanks for your time @jforissier .

It turned out that out rootfs is read only and tee-supplicant could not really create /data/tee and other
files.
After remounting rootfs as "rw", all the test cases are passed now.

+-----------------------------------------------------
15787 subtests of which 0 failed
66 test cases of which 0 failed
0 test case was skipped
TEE test application done!

Apart from it, we are able to run ./optee_example_hello_world test application as well.

root@nitrogen6x:/bin# ./optee_example_hello_world
D/TA: TA_CreateEntryPoint:39 has been called
F/TA: tee_user_mem_alloc:344: Allocate: link:[0x114b98], buf:[0x114ba8:16]
D/TA: TA_OpenSessionEntryPoint:68 has been called
I/TA: Hello World!
Invoking TA to increment 42
D/TA: inc_value:105 has been called
I/TA: Got value: 42 from NW
I/TA: Increase value to: 43
TA incremented value to 43
I/TA: Goodbye!
F/TA: tee_user_mem_free:443: Free: link:[0x114b98], buf:[0x114ba8:16]
D/TA: TA_DestroyEntryPoint:50 has been called

Hope, everything is fine now.

Thanks
Amit.

[PedroRibeiro95]

Hello @Atomar25

Sorry for commenting on a closed issue, but can I ask you for help? I'm also trying to get OP-TEE running on Nitrogen6X and followed the guide you linked, but I can't manage to boot on the board.
Could you please detail your SD card structure and the u-boot commands you used? Thank you very much!

[Atomar25]

Hello @PedroRibeiro95
Sorry for the late reply. I was away from my Nitogenx6x set up.

We used tftp from u-boot prompt to load various images(uTee is one of them) in to memory.

tftp 0x12000000 zImage;tftp 0x18000000 imx6q-nitrogen6x.dtb;tftp 0x20000000 uTee

then just

bootm 0x20000000 - 0x18000000

It should allow you to run OPTEE-OS(uTee) image along side Linux kernel.

Thanks
Amit

[PedroRibeiro95]

Thank you @Atomar25. Just another question, if you don't mind: How did you partition the card? One ext4 partition containing the rootfs and one FAT partition containing the boot files?