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Thu, 14 May 2020 19:07:39 +0000 (GMT) From: =?utf-8?q?=C5=81ukasz_Stelmach?= To: Matt Mackall , Herbert Xu , Arnd Bergmann , Greg Kroah-Hartman , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com, Kukjin Kim , Krzysztof Kozlowski , Florian Fainelli , Markus Elfring , Matthias Brugger , Stefan Wahren , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: Bartlomiej Zolnierkiewicz , =?utf-8?q?=C5=81uk?= =?utf-8?q?asz_Stelmach?= Subject: [PATCH 2/2] hwrng: exynos - Set the quality value Date: Thu, 14 May 2020 21:07:34 +0200 Message-Id: <20200514190734.32746-3-l.stelmach@samsung.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200514190734.32746-1-l.stelmach@samsung.com> MIME-Version: 1.0 Organization: Samsung R&D Institute Poland X-Brightmail-Tracker: H4sIAAAAAAAAA01SfUzMcRjf934v9+vW1a+L9ayMuZVN81Jj7RstjM1vtuRPY+Lwk+htd73Q H6S63lC5K9UVWoXW2+XkKJGu00mrNiEqFHkpFIWUMt39zvjveZ7P2/NsD0PIEml3JiwyhldG KsLltIQ0tk13rZw9fyfEJz13JZ7TtInxtQI9hWvO3idxd8ZVAs+MmcU4uUxP49Oji3D2m48E 7u6uE+PnpgqEDW+eUvjVy2kR7mkspnFB910RLtEOU7jEmIXw28LrNB6rGkbY8iCD2OjK/ZrR IE73qpPmGnQvxFyZoZnmjPe8OENlBs01X6gWc9fLT3JZ9ZWIyxqpQ5y+/gnJJT1Mo7hJw+Id 0l2SgIN8eFgcr1wduE9y+MWcGUVni4/1F78jE1ESnYkcGGDXgrr0McpEEkbGViD4NN5LCs03 BKcbau3IJIIecy76K7lUmUYJwFUEX/Jb7M17BHM1jTYWzW6C7MsPbMACVk2B9msOaQUINh7U Q8OUtXZl10FWVxNhrUnWC1L6p21bSdn10P7rnliIWwJFpzpscwc2AHo/zIgEjgu0Fw7bPJ1Z b6hO6rX7L4HkG0WENRhYMwMX6lNFgtEWaHh00X6DK4xa6u0Bi6BDe2ZezMzXJ0Gr8RO0ZxAY i3+SAmc9DHTN0FYOwS4HfeNqYbwJqt5PIUHqBM8+uwgrOIHGmE8IYymkp8oEtifUZjfZDd3h 7GgFykFy3X/H6P47QPcvqwQRlciNj1VFhPIq30g+fpVKEaGKjQxddSAqwoDm/7Ljt2XiFvr+ aL8JsQySO0p98u6EyChFnOp4hAkBQ8gXSLfrb4fIpAcVxxN4ZdReZWw4rzIhD4aUu0nXlI7s kbGhihj+KM9H88q/qIhxcE9EwZOd5tkpr7Cg+Md1Hpszdo43D0b1LNNYAtt5Z9D7L9uWs9Zv oC8xendVJ11WcMvtytyU709uzdIUU9sh+cSJwSnLVkf906C76f2SchftkVOORRvaXFo6/d3F VI5f4GsiaDJP09Qz1OrWd7M/LGH6a57aM3xFq1PCj4Ux5xZPvA6Wk6rDCl9vQqlS/AGqd5uO kwMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupnleLIzCtJLcpLzFFi42I5/e/4Pd3f0/bGGWxotbL4O+kYu8XGGetZ Ldb2HmWxON+5nNni17sj7BbNi9ezWXS/krHof/ya2eL8+Q3sFjcPrWC02PT4GqvF/Xs/mSwu 75rDZjHj/D4miwWTn7BaLNjWx2jxdOZmNot3q58wWhw/0cnsIOzx+9ckRo9Z98+yeeycdZfd Y/Gm/Wwe2w6oemxa1cnmsX/uGnaPzUvqPfq2rGL06Hu5gdFj/ZarLB5Np9pZPT5vkgvgjdKz KcovLUlVyMgvLrFVija0MNIztLTQMzKx1DM0No+1MjJV0rezSUnNySxLLdK3S9DLuPv3CGNB P3vF7TnPWBoYm9i6GDk5JARMJOavamftYuTiEBJYyijxbMlvpi5GDqCElMTKuekQNcISf651 gdULCTxllHh8Rw/EZhNwlOhfegKsV0RgMqvEmz2tTCAJZoFyidaHT1hBbGEBK4m+c3uYQWwW AVWJlts/wQbxClhLnPx9gB1igbzE7MbTYHFOARuJ6y9+MUEss5a482UuK0S9oMTJmU9YQG5j FlCXWD9PCCTML6AlsabpOgvEWnmJ5q2zmScwCs1C0jELoWMWkqoFjMyrGEVSS4tz03OLjfSK E3OLS/PS9ZLzczcxAhPDtmM/t+xg7HoXfIhRgINRiYfXYOreOCHWxLLiytxDjBIczEoivH7r d8cJ8aYkVlalFuXHF5XmpBYfYjQFenMis5Rocj4waeWVxBuaGppbWBqaG5sbm1koifN2CByM ERJITyxJzU5NLUgtgulj4uCUamA0yDu9I/q3DtOHdw8nizxJWCC3YXNlQ9jxECu9IxZMR7PU wkNarYL+CZcUfwh94Ln33O/Px68LfFt2+JmU3W7O2buN3nktPq+yNi0v89Ldl2fey14OX+xV 2uDQ8iUz+tyjjqyMRxHXZQ22zelcGTJX6P3RSIY/5+07Dz2UvbhDcn3GHiGlOw/UlFiKMxIN tZiLihMBTXD5ViIDAAA= X-CMS-MailID: 20200514190740eucas1p293129b2ef3ba706652a9327e55db9649 X-Msg-Generator: CA X-RootMTR: 20200514190740eucas1p293129b2ef3ba706652a9327e55db9649 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200514190740eucas1p293129b2ef3ba706652a9327e55db9649 References: <20200514190734.32746-1-l.stelmach@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org The value has been estimaded by obtainig 1024 chunks of data 128 bytes (1024 bits) each from the generator and finding chunk with minimal entropy using the ent(1) tool. The value was 6.332937 bits of entropy in each 8 bits of data. Signed-off-by: Łukasz Stelmach --- drivers/char/hw_random/exynos-trng.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c index 8e1fe3f8dd2d..ff6739272bf5 100644 --- a/drivers/char/hw_random/exynos-trng.c +++ b/drivers/char/hw_random/exynos-trng.c @@ -123,6 +123,7 @@ static int exynos_trng_probe(struct platform_device *pdev) trng->rng.init = exynos_trng_init; trng->rng.read = exynos_trng_do_read; trng->rng.priv = (unsigned long) trng; + trng->rng.quality = 800; platform_set_drvdata(pdev, trng); trng->dev = &pdev->dev;