[U-Boot] [PATCH 0/2] Fix CAAM for TrustZone enable for warp7

Bryan O'Donoghue bryan.odonoghue at linaro.org
Wed Jan 24 19:41:52 UTC 2018



On 24/01/18 17:41, Auer, Lukas wrote:
> Thanks for adding me to the CC list.

> I have experienced the same thing regarding the dec0 registers.
> However, I don't understand why you want to detect secure mode in the
> kernel driver to skip RNG instantiation instead of instantiating all
> RNG state handles in the u-boot driver. 

That's what we are doing though.

This set instantiates everything in u-boot and then detects and skips in 
the kernel if-and-only if

1. Trust zone is detected
2. It looks to the Linux CAAM driver as if u-boot has initialised the h/w

For #2 I actually have to variants

1. Which passes a DT parameter which indicates the kernel should skip 
RNG init

2. A module parameter which indicates the kernel should skip rng init

Could we discuss the kernel changes in the kernel thread ?

I believe we agree the u-boot side is right ?


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