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

2021-01-06 Thread Mark Brown
On Wed, Jan 06, 2021 at 10:34:52AM +, 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,

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

2021-01-06 Thread Andre Przywara
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. Hook this SMC call into