From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD39CC43142 for ; Fri, 22 Jun 2018 08:28:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 538B923EF5 for ; Fri, 22 Jun 2018 08:28:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="Njr913zc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 538B923EF5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753147AbeFVI2F (ORCPT ); Fri, 22 Jun 2018 04:28:05 -0400 Received: from mail-wm0-f68.google.com ([74.125.82.68]:38178 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751214AbeFVI2C (ORCPT ); Fri, 22 Jun 2018 04:28:02 -0400 Received: by mail-wm0-f68.google.com with SMTP id 69-v6so1491746wmf.3 for ; Fri, 22 Jun 2018 01:28:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=PT231azWRuPzo+zSXHscLO9gPu0qaceK8Sdl3gWpJiE=; b=Njr913zcUVVLhUAlaP+AtVz3enlPzVd90zZbvIbHThfRAdZ0YDLw0uWR2u0S5qNRoY Uq2+BIPaQNDha6/0gT1TWRKr8Bp9EPzzwifwdPNRViDSrX3pModi1jd/XHzh32EyRqkd Rb4nA8GXIfEXBtrs3D0MCOP01pUbqLYxcHpc4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=PT231azWRuPzo+zSXHscLO9gPu0qaceK8Sdl3gWpJiE=; b=a67DDbhX406sYqGzI5cS2JkHcbfPRRsxDs+GkIRm2cpvpFWyOhrS6Rfd4u9nxOcqCL DsvNSthHUZ6Eam0pI+U88XkfMYrdLGvIifo/6XQevjjk1+3grgyB57gW0VRUAv5gZ/Vu 9CmmbcuTt8zEcM7jTUX2fI/tRLcu0crMTshf4G4+3kkSAlKmGIafvHweNUROyD/5USRU U4SNp/jJS2h74+g6xkaCV3NovqPcTMkXhGsq2be6xVHZlm6UVZRJgB8ceHRmdvfHwEP4 jeThwlngppdpluUMheIuXA5xPWQ2VvBiLJNtmZCzl1lNgAuE6g9tttY0d8NkSQsNqo9p FU4Q== X-Gm-Message-State: APt69E3RoinLN8mOq+munlFwUr0IJhxHbsbe8snNnnJV0e62Txp9r1tI kygbjvIdc0eRqYUp5yILoQZsBg== X-Google-Smtp-Source: AAOMgpfvcWJVHMj12ru/Y6q34UsrIDoBSCe/qDyx9beM94084SxglZwhbf9JH3gqtQs0xGzOwC7slA== X-Received: by 2002:a1c:bf0c:: with SMTP id p12-v6mr860920wmf.120.1529656080898; Fri, 22 Jun 2018 01:28:00 -0700 (PDT) Received: from [192.168.27.209] ([37.157.136.206]) by smtp.googlemail.com with ESMTPSA id c18-v6sm10923908wrq.17.2018.06.22.01.27.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 22 Jun 2018 01:28:00 -0700 (PDT) Subject: Re: [PATCH 3/3] hwrng: msm - Add support for prng v2 To: Herbert Xu , Stanimir Varbanov Cc: Vinod Koul , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, Matt Mackall , Arnd Bergmann , Greg Kroah-Hartman , linux-arm-msm@vger.kernel.org, Vinod Koul References: <20180618141259.23141-1-vkoul@kernel.org> <20180618141259.23141-4-vkoul@kernel.org> <20180619142853.wgi5easw4zv6ttrb@gondor.apana.org.au> <966e9cd4-70a3-8d54-df0f-16df3df45fb5@linaro.org> <20180621101506.rnklbtapvfdev4xb@gondor.apana.org.au> <20180621115312.rfmbitrhqi44wu5w@gondor.apana.org.au> From: Stanimir Varbanov Message-ID: <6782b1c0-ea94-b07c-2fae-3fe3223bb22a@linaro.org> Date: Fri, 22 Jun 2018 11:27:59 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180621115312.rfmbitrhqi44wu5w@gondor.apana.org.au> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Herbert, On 06/21/2018 02:53 PM, Herbert Xu wrote: > On Thu, Jun 21, 2018 at 02:27:10PM +0300, Stanimir Varbanov wrote: >> >> OK, I just wanted to say that it is _not_ PRNG and the register names >> gives us wrong impression. > > So does it generate one bit of output for each bit of hardware- > generated entropy like /dev/random? Or does it use a hardware- > generated seed to power a PRNG? I believe it is the second one. Isn't the second one SP 800-90A? -- regards, Stan