Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1751547AbcLEM5r (ORCPT <rfc822;w@1wt.eu>);
        Mon, 5 Dec 2016 07:57:47 -0500
Received: from mail-wj0-f194.google.com ([209.85.210.194]:32999 "EHLO
        mail-wj0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1750998AbcLEM5n (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 5 Dec 2016 07:57:43 -0500
Date: Mon, 5 Dec 2016 13:57:38 +0100
From: Corentin Labbe <clabbe.montjoie@gmail.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: davem@davemloft.net, maxime.ripard@free-electrons.com, wens@csie.org,
        linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] crypto: sun4i-ss: support the Security System PRNG
Message-ID: <20161205125738.GA13525@Red>
References: <1480934922-20732-1-git-send-email-clabbe.montjoie@gmail.com>
 <20161205123705.GA10732@gondor.apana.org.au>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20161205123705.GA10732@gondor.apana.org.au>
User-Agent: Mutt/1.5.24 (2015-08-30)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 632
Lines: 18

On Mon, Dec 05, 2016 at 08:37:05PM +0800, Herbert Xu wrote:
> On Mon, Dec 05, 2016 at 11:48:42AM +0100, Corentin Labbe wrote:
> > From: LABBE Corentin <clabbe.montjoie@gmail.com>
> > 
> > The Security System have a PRNG.
> > This patch add support for it as an hwrng.
> > 
> > Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
> 
> Please don't add PRNGs to hwrng.  If we have existing PRNGs in
> there please let me know so that we can remove them.
> 

So how to expose PRNG to user space ? or more generally how to "use" a PRNG ?

I found hisi-rng, crypto4xx_ and exynos-rng which seems to be PRNG used as hwrng.

Regards