linux-kernel - Re: [PATCH 3/3] hwrng: msm

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Message-ID: <20180619142853.wgi5easw4zv6ttrb@gondor.apana.org.au>
Date:   Tue, 19 Jun 2018 22:28:53 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Vinod Koul <vinod.koul@...aro.org>
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matt Mackall <mpm@...enic.com>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-msm@...r.kernel.org, Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH 3/3] hwrng: msm - Add support for prng v2

On Mon, Jun 18, 2018 at 07:42:59PM +0530, Vinod Koul wrote:
> Qcom 8996 and later chips support prng v2 where we need to only
> implement .read callback for hwrng.
> 
> Add a new table for v2 which supports this and get version required for
> driver data.
> 
> Signed-off-by: Vinod Koul <vkoul@...nel.org>

Is this really a pseudo-RNG? If so it needs to be moved over to
the algif_rng interface.

hwrng is for true hardware RNGs only, because it may be directly
fed into /dev/random.

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt