linux-kernel - Re: [PATCH v4 1/6] crypto: caam

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Message-ID: <VI1PR0402MB348579B485FC139EDA222B0C984A0@VI1PR0402MB3485.eurprd04.prod.outlook.com>
Date:   Mon, 25 Nov 2019 08:02:45 +0000
From:   Horia Geanta <horia.geanta@....com>
To:     Andrey Smirnov <andrew.smirnov@...il.com>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>
CC:     Aymen Sghaier <aymen.sghaier@....com>,
        Vipul Kumar <vipul_kumar@...tor.com>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Iuliana Prodan <iuliana.prodan@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH v4 1/6] crypto: caam - RNG4 TRNG errata

On 11/21/2019 5:56 PM, Andrey Smirnov wrote:
> The TRNG as used in RNG4, used in CAAM has a documentation issue. The
I assume the "erratum" consists in RTMCTL[TRNG_ACC] bit
not being documented, correct?

Is there an ID of the erratum?
Or at least do you know what parts / SoCs have incorrect documentation?

> effect is that it is possible that the entropy used to instantiate the
> DRBG may be old entropy, rather than newly generated entropy. There is
> proper programming guidance, but it is not in the documentation.
> 
Is the "programming guidance" public?

Thanks,
Horia