[U-Boot] [PATCH v4 2/2] imx: mx7: run sec_init for CAAM RNG

[Fabio Estevam]

On Fri, Jan 26, 2018 at 2:27 PM, Bryan O'Donoghue
<bryan.odonoghue at linaro.org> wrote:
> This patch adds a sec_init call into arch_misc_init(). Doing so in
> conjunction with the patch "drivers/crypto/fsl: assign job-rings to
> non-TrustZone" enables use of the CAAM in Linux when OPTEE/TrustZone is
> active.
>
> u-boot will initialise the RNG and assign ownership of the job-ring
> registers to a non-TrustZone context. With recent changes by Lukas Auer to
> fully initialize the RNG in sec_init() this means that u-boot will hand-off
> the CAAM in a state that Linux then can use the CAAM without touching the
> reserved DECO registers.
>
> This change is safe both for the OPTEE/TrustZone boot path and the regular
> non-OPTEE/TrustZone boot path.
>
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue at linaro.org>
> Cc: Fabio Estevam <fabio.estevam at nxp.com>
> Cc: Peng Fan <peng.fan at nxp.com>
> Cc: Marco Franchi <marco.franchi at nxp.com>
> Cc: Vanessa Maegima <vanessa.maegima at nxp.com>
> Cc: Stefano Babic <sbabic at denx.de>
> Cc: Lukas Auer <lukas.auer at aisec.fraunhofer.de>

Reviewed-by: Fabio Estevam <fabio.estevam at nxp.com>