Re: [PATCH 3/3] hwrng: msm - Add support for prng v2

From: Stanimir Varbanov
Date: Fri Jun 22 2018 - 04:28:09 EST


Hi Herbert,

On 06/21/2018 02:53 PM, Herbert Xu wrote:
> On Thu, Jun 21, 2018 at 02:27:10PM +0300, Stanimir Varbanov wrote:
>>
>> OK, I just wanted to say that it is _not_ PRNG and the register names
>> gives us wrong impression.
>
> So does it generate one bit of output for each bit of hardware-
> generated entropy like /dev/random? Or does it use a hardware-
> generated seed to power a PRNG?

I believe it is the second one. Isn't the second one SP 800-90A?

--
regards,
Stan