On 10/25/21 6:55 PM, Spandan Mahadevegowda wrote:

Hello Alexandru,

I'm currently working on some POC on Pine64 that requires a Trusted Execution Environment. I was using U-Boot 2020.10 with SPL_FIT_GENERATOR and modified mksunxi_fit_atf.sh to accommodate OP-TEE. However, due to new changes in OPTEE and ARM_TF, I was required to update the components and as such had to change to the recent version of U-Boot. I see that from the 2021.01 release and later, all ARM64 devices including sunxi boards were modified to use binman. I did the necessary changes in the latest u-boot to use my tee.bin and generate the u-boot-sunxi-with-spl.bin. However, when I run this on the board, I see that the SPL throws the "alloc space exhausted", "Could not get FIT buffer of 1694208 bytes" errors and I understand that this is due to the change in how SPL now loads images from your commit *03f1f78a9b44b5fd6fc09faf81639879d2d0f85f*. I am not very familiar with FIT and DTB handling, could you guild me with some pointers on how I can fix this?

Try increasing CONFIG_SYS_SPL_MALLOC_SIZE.

After debugging a little, I found that the BL31 (ARM-TF) does not find any DTB to load BL33 (UBOOT) after the BL31->BL32->BL31 (ARM-TF-> OPTEE -> ARM-TF) flow. In the Configuration, if I put "tee" as the first loadable, the OPTEE loads and does its initialization and gives back control to ARM-TF after which ARM-TF does not know where to find UBOOT. But if I put uboot first under loadable, ARM-TF does not find OPTEE (BL32). Any inputs from your end would greatly help me.

Thank you for your time and consideration,

Best Regards, *Spandan Mahadevegowda*