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From: Corentin Labbe <clabbe.montjoie@gmail.com>
To: Samuel Holland <samuel@sholland.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
	"David S . Miller" <davem@davemloft.net>,
	Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Conor Dooley <conor@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org, linux-sunxi@lists.linux.dev
Subject: Re: [PATCH v2 2/3] crypto: sun8i-ce - Add TRNG clock to the D1 variant
Date: Fri, 6 Jan 2023 09:18:24 +0100	[thread overview]
Message-ID: <Y7fZUDSWaZhpL0hc@Red> (raw)
In-Reply-To: <20221231220146.646-3-samuel@sholland.org>

Le Sat, Dec 31, 2022 at 04:01:44PM -0600, Samuel Holland a écrit :
> At least the D1 variant requires a separate clock for the TRNG.
> Without this clock enabled, reading from /dev/hwrng reports:
> 
>    sun8i-ce 3040000.crypto: DMA timeout for TRNG (tm=96) on flow 3
> 
> Experimentation shows that the necessary clock is the SoC's internal
> RC oscillator. This makes sense, as noise from the oscillator can be
> used as a source of entropy.
> 
> Signed-off-by: Samuel Holland <samuel@sholland.org>
> ---
> 

Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>

Thanks

WARNING: multiple messages have this Message-ID (diff)
From: Corentin Labbe <clabbe.montjoie@gmail.com>
To: Samuel Holland <samuel@sholland.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
	"David S . Miller" <davem@davemloft.net>,
	Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Conor Dooley <conor@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org, linux-sunxi@lists.linux.dev
Subject: Re: [PATCH v2 2/3] crypto: sun8i-ce - Add TRNG clock to the D1 variant
Date: Fri, 6 Jan 2023 09:18:24 +0100	[thread overview]
Message-ID: <Y7fZUDSWaZhpL0hc@Red> (raw)
In-Reply-To: <20221231220146.646-3-samuel@sholland.org>

Le Sat, Dec 31, 2022 at 04:01:44PM -0600, Samuel Holland a écrit :
> At least the D1 variant requires a separate clock for the TRNG.
> Without this clock enabled, reading from /dev/hwrng reports:
> 
>    sun8i-ce 3040000.crypto: DMA timeout for TRNG (tm=96) on flow 3
> 
> Experimentation shows that the necessary clock is the SoC's internal
> RC oscillator. This makes sense, as noise from the oscillator can be
> used as a source of entropy.
> 
> Signed-off-by: Samuel Holland <samuel@sholland.org>
> ---
> 

Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>

Thanks

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

WARNING: multiple messages have this Message-ID (diff)
From: Corentin Labbe <clabbe.montjoie@gmail.com>
To: Samuel Holland <samuel@sholland.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
	"David S . Miller" <davem@davemloft.net>,
	Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Conor Dooley <conor@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org, linux-sunxi@lists.linux.dev
Subject: Re: [PATCH v2 2/3] crypto: sun8i-ce - Add TRNG clock to the D1 variant
Date: Fri, 6 Jan 2023 09:18:24 +0100	[thread overview]
Message-ID: <Y7fZUDSWaZhpL0hc@Red> (raw)
In-Reply-To: <20221231220146.646-3-samuel@sholland.org>

Le Sat, Dec 31, 2022 at 04:01:44PM -0600, Samuel Holland a écrit :
> At least the D1 variant requires a separate clock for the TRNG.
> Without this clock enabled, reading from /dev/hwrng reports:
> 
>    sun8i-ce 3040000.crypto: DMA timeout for TRNG (tm=96) on flow 3
> 
> Experimentation shows that the necessary clock is the SoC's internal
> RC oscillator. This makes sense, as noise from the oscillator can be
> used as a source of entropy.
> 
> Signed-off-by: Samuel Holland <samuel@sholland.org>
> ---
> 

Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>

Thanks

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2023-01-06  8:18 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-31 22:01 [PATCH v2 0/3] crypto: Allwinner D1 crypto support Samuel Holland
2022-12-31 22:01 ` Samuel Holland
2022-12-31 22:01 ` Samuel Holland
2022-12-31 22:01 ` [PATCH v2 1/3] dt-bindings: crypto: sun8i-ce: Add compatible for D1 Samuel Holland
2022-12-31 22:01   ` Samuel Holland
2022-12-31 22:01   ` Samuel Holland
2023-01-01 15:57   ` Krzysztof Kozlowski
2023-01-01 15:57     ` Krzysztof Kozlowski
2023-01-01 15:57     ` Krzysztof Kozlowski
2023-01-06  8:20   ` Corentin Labbe
2023-01-06  8:20     ` Corentin Labbe
2023-01-06  8:20     ` Corentin Labbe
2023-01-13  3:51   ` Herbert Xu
2023-01-13  3:51     ` Herbert Xu
2023-01-13  3:51     ` Herbert Xu
2023-01-13  8:33     ` Krzysztof Kozlowski
2023-01-13  8:33       ` Krzysztof Kozlowski
2023-01-13  8:33       ` Krzysztof Kozlowski
2023-01-13  8:37       ` Herbert Xu
2023-01-13  8:37         ` Herbert Xu
2023-01-13  8:37         ` Herbert Xu
2022-12-31 22:01 ` [PATCH v2 2/3] crypto: sun8i-ce - Add TRNG clock to the D1 variant Samuel Holland
2022-12-31 22:01   ` Samuel Holland
2022-12-31 22:01   ` Samuel Holland
2023-01-05 16:29   ` Jernej Škrabec
2023-01-05 16:29     ` Jernej Škrabec
2023-01-05 16:29     ` Jernej Škrabec
2023-01-06  8:18   ` Corentin Labbe [this message]
2023-01-06  8:18     ` Corentin Labbe
2023-01-06  8:18     ` Corentin Labbe
2022-12-31 22:01 ` [PATCH v2 3/3] riscv: dts: allwinner: d1: Add crypto engine node Samuel Holland
2022-12-31 22:01   ` Samuel Holland
2022-12-31 22:01   ` Samuel Holland
2023-01-05 16:30   ` Jernej Škrabec
2023-01-05 16:30     ` Jernej Škrabec
2023-01-05 16:30     ` Jernej Škrabec
2023-03-07 20:55   ` Palmer Dabbelt
2023-03-07 20:55     ` Palmer Dabbelt
2023-03-07 20:55     ` Palmer Dabbelt
2023-03-14 20:35   ` Jernej Škrabec
2023-03-14 20:35     ` Jernej Škrabec
2023-03-14 20:35     ` Jernej Škrabec
2023-01-13  8:40 ` [PATCH v2 0/3] crypto: Allwinner D1 crypto support Herbert Xu
2023-01-13  8:40   ` Herbert Xu
2023-01-13  8:40   ` Herbert Xu

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