darknetp: TEEC_Opensession failed with code 0xffff0008 origin 0x3

[ZLKong]

Hi Mofanv,

I am running a simulation on QEMU-v8 I followed the instructions and put the files in the right folders. But after rebuilding, I still cannot open darknet in the TEE. I tried hello_world, it worked, but darknetp does not. Do you know how to fix it?

Thanks! Kong

[mofanv]

Hi @ZLKong , sorry for the very late response. I'm wondering have you fix it? One reason for TEEC_Opensession failed with code 0xffff0008 origin 0x3 could be that the QEMU does not have enough secure memory to open the TA. Therefore, it has a problem with opening darknetp but can deal with HelloWorld successfully.

You can first try to decrease the required memory size, which is in ta/include/user_ta_header_defines.h

#define TA_DATA_SIZE

to around 2~5MB, then put less number of layers in the TEE, to see if this solve the problem.

Another way is to increase the mapping memory of QEMU. Check this out.

[ZLKong]

Hi Mofanv:

Thank you for your rely. I will try it out.

Best, Kong

[ZLKong]

It worked. Thank you very much!

[21212124]

Hi @mofanv

I am running optee_example_hello_world on my imx8m mini board and I have this error: TEEC_Opensession failed with code 0xffff0008 origin 0x3 I tried to change TA_DATA_SIZE but it remains the same error, some other idea of why it happens?

Thanks

[mofanv]

Hi @21212124 , I don't have an imx8m board. but seems there is an issue with the board. Does the OPTEE support your board? I don't see this board on their list https://optee.readthedocs.io/en/latest/building/devices/index.html, maybe ask the OPTEE team..

[21212124]

Hi @mofanv I think it is supported: https://optee.readthedocs.io/en/latest/general/platforms.html?highlight=imx#platforms-supported

I think it is a problem with the .TA