Received-SPF: pass (google.com: domain of linux-crypto-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   =?UTF-8?q?=C5=81ukasz=20Stelmach?= <l.stelmach@samsung.com>
To:     Matt Mackall <mpm@selenic.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Ray Jui <rjui@broadcom.com>,
        Scott Branden <sbranden@broadcom.com>,
        bcm-kernel-feedback-list@broadcom.com,
        Kukjin Kim <kgene@kernel.org>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Markus Elfring <elfring@users.sourceforge.net>,
        Matthias Brugger <mbrugger@suse.com>,
        Stefan Wahren <wahrenst@gmx.net>, linux-crypto@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-samsung-soc@vger.kernel.org,
        Stephan Mueller <smueller@chronox.de>
Cc:     Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        =?UTF-8?q?=C5=81ukasz=20Stelmach?= <l.stelmach@samsung.com>
Subject: [PATCH v2 1/2] hwrng: iproc-rng200 - Set the quality value
Date:   Tue, 19 May 2020 23:25:51 +0200
Message-Id: <20200519212552.11671-2-l.stelmach@samsung.com>
In-Reply-To: <20200519212552.11671-1-l.stelmach@samsung.com>
MIME-Version: 1.0
Organization: Samsung R&D Institute Poland
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset="utf-8"
CMS-TYPE: 201P
References: <20200514190734.32746-1-l.stelmach@samsung.com>
        <20200519212552.11671-1-l.stelmach@samsung.com>
        <CGME20200519212619eucas1p22fa5d3db2521096dc4b79f6e53016d17@eucas1p2.samsung.com>
Sender: linux-crypto-owner@vger.kernel.org
Precedence: bulk

The value was estimaded with ea_iid[1] using on 10485760 bytes read from
the RNG via /dev/hwrng. The min-entropy value calculated using the most
common value estimate (NIST SP 800-90P[2], section 6.3.1) was 7.964464.

[1] https://github.com/usnistgov/SP800-90B_EntropyAssessment
[2] https://csrc.nist.gov/publications/detail/sp/800-90b/final

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
 drivers/char/hw_random/iproc-rng200.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/hw_random/iproc-rng200.c b/drivers/char/hw_random/iproc-rng200.c
index 32d9fe61a225..95669ece050f 100644
--- a/drivers/char/hw_random/iproc-rng200.c
+++ b/drivers/char/hw_random/iproc-rng200.c
@@ -199,6 +199,7 @@ static int iproc_rng200_probe(struct platform_device *pdev)
 	priv->rng.read = iproc_rng200_read,
 	priv->rng.init = iproc_rng200_init,
 	priv->rng.cleanup = iproc_rng200_cleanup,
+	priv->rng.quality = 1000,
 
 	/* Register driver */
 	ret = devm_hwrng_register(dev, &priv->rng);
-- 
2.26.2