On Tue, 5 Jan 2021 17:00:14 +
Mark Brown wrote:
> On Tue, Jan 05, 2021 at 04:36:51PM +, Andre Przywara wrote:
>
> > @@ -77,10 +117,20 @@ arch_get_random_seed_long_early(unsigned long
> > *v) {
> > WARN_ON(system_state != SYSTEM_BOOTING);
> >
> > - if (!__early_cpu_has_rndr())
> >
On Tue, Jan 05, 2021 at 04:36:51PM +, Andre Przywara wrote:
> @@ -77,10 +117,20 @@ arch_get_random_seed_long_early(unsigned long *v)
> {
> WARN_ON(system_state != SYSTEM_BOOTING);
>
> - if (!__early_cpu_has_rndr())
> - return false;
> + if (__early_cpu_has_rndr())
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
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