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=-6.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 E0C46C4363C for ; Wed, 7 Oct 2020 10:49:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9DA75212CC for ; Wed, 7 Oct 2020 10:49:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602067784; bh=1wuWrBxTStM0az/awlDUjLP9jEWZ5Wpim0mWksWSOUA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=VYCPwoEqlQGdKlQ9jKIZOdOTMlXb6AkQ7JFf05YrlPOtnCwHl8P6kkyboQowUvgor 96pgWfBz8a/1sePPwX+hKiA0tneadt7f2osjTJkMoonKyAPWSWycSHQMzh5J1Cpygn aUbaURH9GvDbJ47G6wQcdIjfUNbrLwAGQuAk4drE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728214AbgJGKtn (ORCPT ); Wed, 7 Oct 2020 06:49:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:60612 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728204AbgJGKtm (ORCPT ); Wed, 7 Oct 2020 06:49:42 -0400 Received: from localhost (fw-tnat.cambridge.arm.com [217.140.96.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C902C20870; Wed, 7 Oct 2020 10:49:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602067782; bh=1wuWrBxTStM0az/awlDUjLP9jEWZ5Wpim0mWksWSOUA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=cPmVZRUwByaoivWI1uqYU7zS5g9j5p/qV2QRVTG29W6uwF5tMLyYP3nNpY1J4NUTX 7JMG/znA/bnbXIHJWikzQM73gt6MQd5pa/TdAklZizIUrmK5f7cYYxo0S/43gypMtr +jKrye872fH2qRyuYsmcN8LAF434DjiLsK9L6arg= Date: Wed, 7 Oct 2020 11:48:38 +0100 From: Mark Brown To: Andre Przywara Cc: Catalin Marinas , Will Deacon , Mark Rutland , Ard Biesheuvel , Richard Henderson , Lorenzo Pieralisi , Sudeep Holla , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] arm64: Add support for SMCCC TRNG firmware interface Message-ID: <20201007104838.GA5030@sirena.org.uk> References: <20201006201808.37665-1-andre.przywara@arm.com> <20201006201808.37665-3-andre.przywara@arm.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="wRRV7LY7NUeQGEoC" Content-Disposition: inline In-Reply-To: <20201006201808.37665-3-andre.przywara@arm.com> X-Cookie: Two heads are more numerous than one. User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --wRRV7LY7NUeQGEoC Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Oct 06, 2020 at 09:18:08PM +0100, Andre Przywara wrote: > The ARM architected TRNG firmware interface, described in ARM spec > DEN0098[1], defines an ARM SMCCC based interface to a true random number > generator, provided by firmware. > This can be discovered via the SMCCC >=v1.1 interface, and provides > up to 192 bits of entropy per call. Reviewed-by: Mark Brown --wRRV7LY7NUeQGEoC Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl99nQUACgkQJNaLcl1U h9ALVAf/RE8cMKM1nbggP3489Btap0JuTt7uhwVRspEJ7WG/WHEeSWvW6tTQZhCf A+HVamghoOcekfVOT9QFFiN1Z8WdMsXcFOkmdAb6IonVGL7qz+d3f47wbjk2LnE6 Fucf5tZ3VKJ0FePTC3CkFu3zPnJYqGtEi5DX0krnTWy3hXDcVk+KeJsaK4g9VUak Jh6YZvzVbZPgtvN06klk30W40cN1mFTpuiF+vx/tjh24cAkOZ0hSwNAzsd0ZxyMO DYA5stPpUTa9WDqPTura3byuDUvhwWy7Xktb//zC6aJcg1bCoblr8x/SNbXNgeHu 3X8l7zZx0VwsECUOUe9jqc5bh2Lh2Q== =QBrs -----END PGP SIGNATURE----- --wRRV7LY7NUeQGEoC--