linux-kernel - Re: [PATCH v4 0/2] hwrng: Add Arm SMCCC TRNG based driver

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Message-ID: <20210802104040.GA4668@sirena.org.uk>
Date:   Mon, 2 Aug 2021 11:40:40 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Andre Przywara <andre.przywara@....com>
Cc:     Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Will Deacon <will@...nel.org>, Ali Saidi <alisaidi@...zon.com>,
        Jon Nettleton <jon@...id-run.com>
Subject: Re: [PATCH v4 0/2] hwrng: Add Arm SMCCC TRNG based driver

On Sat, Jul 31, 2021 at 09:48:43PM +0100, Andre Przywara wrote:
> The "Arm True Random Number Generator Firmware Interface"[1] provides
> an SMCCC based interface to a true hardware random number generator.
> So far we are using that in arch_get_random_seed(), but it might be
> useful to expose the entropy through the /dev/hwrng device as well. This
> allows to assess the quality of the implementation, by using "rngtest"
> from the rng-tools package, for example.

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

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