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From: Peter Maydell <peter.maydell@linaro.org>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Igor Mitsyanko <i.mitsyanko@gmail.com>,
	qemu-arm <qemu-arm@nongnu.org>,
	QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH v2] hw/misc: Add Exynos4210 Pseudo Random Number Generator
Date: Tue, 4 Apr 2017 13:09:08 +0100	[thread overview]
Message-ID: <CAFEAcA8WGoa=DYXRH4MHfnHmUR_5-xERdmcuqrsk=bmS7GBCmg@mail.gmail.com> (raw)
In-Reply-To: <20170318192509.15499-1-krzk@kernel.org>

On 18 March 2017 at 19:25, Krzysztof Kozlowski <krzk@kernel.org> wrote:
> Add emulation for Exynos4210 Pseudo Random Number Generator which could
> work on fixed seeds or with seeds provided by True Random Number
> Generator block inside the SoC.
>
> Implement only the fixed seeds part of it in polling mode (no
> interrupts).  Simple testing:
>     # echo "exynos" > /sys/class/misc/hw_random/rng_current
>     # dd if=/dev/hwrng of=/dev/null bs=1 count=16
>
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
>
> ---
>
> Changes since v1:
> 1. Use GRand-like functions to fix build on MingW32 (this adds also
>    finalize).
> 2. Add DPRINTF macro.
> 3. Use HWADDR_PRIx and family for printing values.

Is there a data sheet that describes this RNG? I had a quick google
but couldn't find anything in the 4210 manual you can get from Samsung.

In particular I'm not sure we want to use GRand here.

thanks
-- PMM

  reply	other threads:[~2017-04-04 12:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-18 19:25 [Qemu-devel] [PATCH v2] hw/misc: Add Exynos4210 Pseudo Random Number Generator Krzysztof Kozlowski
2017-04-04 12:09 ` Peter Maydell [this message]
2017-04-04 13:44   ` Krzysztof Kozlowski
2017-04-04 14:05     ` Peter Maydell
2017-04-04 14:31       ` Krzysztof Kozlowski
2017-04-10 15:15         ` Peter Maydell
2017-04-11 12:02           ` Krzysztof Kozlowski
2017-04-11 12:07             ` Peter Maydell

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