linux-kernel - Re: [PATCH] hwrng: bcm2835: set quality to 1000

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Message-ID: <b0cf1be0-4c7c-57ee-fea5-789fe215b85d@gmail.com>
Date:   Thu, 4 Mar 2021 14:28:34 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     Álvaro Fernández Rojas <noltari@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Andrew Lunn <andrew@...n.ch>, Matt Mackall <mpm@...enic.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Rikard Falkeborn <rikard.falkeborn@...il.com>,
        linux-crypto@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        stijn@...ux-ipv6.be, ynezz@...e.cz
Subject: Re: [PATCH] hwrng: bcm2835: set quality to 1000

On 3/4/21 7:11 AM, Nicolas Saenz Julienne wrote:
> On Wed, 2021-03-03 at 10:29 +0100, Álvaro Fernández Rojas wrote:
>> Hi Herbert,
>>
>>> El 3 mar 2021, a las 10:20, Herbert Xu <herbert@...dor.apana.org.au> escribió:
>>>
>>> On Sat, Feb 20, 2021 at 08:12:45PM +0100, Álvaro Fernández Rojas wrote:
>>>>
>>>> I ran rngtest and this is what I got:
>>>
>>> This is meaningless except for sources that have not been whitened.
>>>
>>> Your justification needs to be based on what the hardware does or
>>> is documented to do.
>>
>> Ok, so I guess that we’re never setting that value to anything since there’s
>> no public documentation about that ¯\_(ツ)_/¯.
> 
> @Florian, is there a way you might be able to get the official value?

I will be looking into the documentation this weekend and let you know
whether we can change the driver's quality accordingly.
-- 
Florian