Re: [PATCH v6 4/5] arm64: Add support for SMCCC TRNG entropy source

On Wed, Jan 06, 2021 at 10:34:52AM +0000, Andre Przywara wrote:

The ARM architected TRNG firmware interface, described in ARM spec
DEN0098, defines an ARM SMCCC based interface to a true random number
generator, provided by firmware.
This can be discovered via the SMCCC >=v1.1 interface, and provides
up to 192 bits of entropy per call.

Reviewed-by: Mark Brown <broonie@kernel.org>