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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT 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 106BFC43387 for ; Thu, 3 Jan 2019 20:29:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C3C4321479 for ; Thu, 3 Jan 2019 20:29:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727331AbfACU3F (ORCPT ); Thu, 3 Jan 2019 15:29:05 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:51772 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726036AbfACU3F (ORCPT ); Thu, 3 Jan 2019 15:29:05 -0500 Received: by atrey.karlin.mff.cuni.cz (Postfix, from userid 512) id 3586780806; Thu, 3 Jan 2019 21:28:57 +0100 (CET) Date: Thu, 3 Jan 2019 21:29:01 +0100 From: Pavel Machek To: Kristina Martsenko Cc: linux-arm-kernel@lists.infradead.org, Adam Wallis , Amit Kachhap , Andrew Jones , Ard Biesheuvel , Catalin Marinas , Christoffer Dall , Cyrill Gorcunov , Dave P Martin , Jacob Bramley , Kees Cook , Marc Zyngier , Mark Rutland , Ramana Radhakrishnan , Richard Henderson , Suzuki K Poulose , Will Deacon , kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 07/13] arm64: add basic pointer authentication support Message-ID: <20190103202901.GA21564@amd> References: <20181207183931.4285-1-kristina.martsenko@arm.com> <20181207183931.4285-8-kristina.martsenko@arm.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="gKMricLos+KVdGMg" Content-Disposition: inline In-Reply-To: <20181207183931.4285-8-kristina.martsenko@arm.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --gKMricLos+KVdGMg Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri 2018-12-07 18:39:25, Kristina Martsenko wrote: > From: Mark Rutland >=20 > This patch adds basic support for pointer authentication, allowing > userspace to make use of APIAKey, APIBKey, APDAKey, APDBKey, and > APGAKey. The kernel maintains key values for each process (shared by all > threads within), which are initialised to random values at exec() time. =2E.. > +/* > + * We give each process its own keys, which are shared by all threads. T= he keys > + * are inherited upon fork(), and reinitialised upon exec*(). > + */ > +struct ptrauth_keys { > + struct ptrauth_key apia; > + struct ptrauth_key apib; > + struct ptrauth_key apda; > + struct ptrauth_key apdb; > + struct ptrauth_key apga; > +}; intstruction_a, data_a, generic_a? Should be easier to understand than "apdb" ... Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --gKMricLos+KVdGMg Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlwucI0ACgkQMOfwapXb+vKOAwCgkLvdESb50TdMC9uVVTRAt2oy JY0An30sVTzX4gQ5fTxKf5nu3+EScPPb =MRNf -----END PGP SIGNATURE----- --gKMricLos+KVdGMg--