[U-Boot] imx7d: CPU core issue in secure mode

[Tobias Junghans]

Hi,

I'm trying to get an imx7d-based Colibris board running in secure mode in 
order to be able to use the CAAM, especially the HWRNG. However it seems like 
it's currently not possible to boot a mainline kernel (4.19) in secure mode 
with both CPU cores powered up, likely due to the missing PSCI firmware in 
secure mode. When booting in nonsecure mode the kernel recognizes both CPU 
cores while CAAM isn't working. Basically it's the same issue as discussed at

https://www.spinics.net/lists/u-boot-v2/msg33873.html

I'm using the latest mainline U-Boot (2019.07-rc4) with 
CONFIG_ARMV7_BOOT_SEC_DEFAULT=y. Is there anything I can do about this issue?

Thank you and best regards

Tobias