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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A791EC71134 for ; Wed, 23 Aug 2023 17:19:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237787AbjHWRTI (ORCPT ); Wed, 23 Aug 2023 13:19:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52590 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237773AbjHWRTH (ORCPT ); Wed, 23 Aug 2023 13:19:07 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDF0E10DF; Wed, 23 Aug 2023 10:18:57 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6FF846313A; Wed, 23 Aug 2023 17:18:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 10068C433C8; Wed, 23 Aug 2023 17:18:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692811136; bh=3HK+7HvBNxbV1P+aiK9hr3XF3Ps6uIkOCiLCB9Xo9iw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=TLQVJWTMSbpVFHXaSy3LDCgnAS85gL2dId3RmdwQ88J03SgSRomfu15hlCvmrfX7a o1v2U7nrQu7DYM2lU8OIP0jOhMlWWXolByjQHf90LY1wrfYUcFgg/g5zmED3h/S1C+ d8Skc40K5SVdvzHX8sm6m9qfDVUC6U4zEitZseegCbW7m3kFTorOwv3nSaZJLJ77ha /7RlXIyOiwbJeZDQpg/YC72tiVRkCbB3qFcTStKEvqsSZnGPsR/551JlYJVYUyySfV /7bOLRqUEDeVb6qlnB6KF6yUCnIN1WTp7fmos3NmNcegNWAg+jq/80ovlYCOzjzp8h mCrdyvvaZK6sQ== Date: Wed, 23 Aug 2023 18:18:47 +0100 From: Mark Brown To: Catalin Marinas Cc: Szabolcs Nagy , Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Kees Cook , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [PATCH v4 03/36] arm64/gcs: Document the ABI for Guarded Control Stacks Message-ID: References: <20230807-arm64-gcs-v4-3-68cfa37f9069@kernel.org> <43ec219d-bf20-47b8-a5f8-32bc3b64d487@sirena.org.uk> <227e6552-353c-40a9-86c1-280587a40e3c@sirena.org.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="JpUNoCeyjQJaWYxw" Content-Disposition: inline In-Reply-To: X-Cookie: Some optional equipment shown. Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --JpUNoCeyjQJaWYxw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Aug 23, 2023 at 05:45:11PM +0100, Catalin Marinas wrote: > I don't mind the divergence in this area if the libc folks are ok with > it. x86 can eventually use the clone3() interface if they want more > flexibility, they'll just have to continue supporting the old one. I > think we already diverge around the prctl(). Yes, though that's basically the same thing - the difference is basically just that x86 uses their custom arch_prctl() thing and we use a regular prctl(), there's nothing conceptual going on like there is here. I don't really mind either, it's just something where I'd anticipate pushback. --JpUNoCeyjQJaWYxw Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmTmP3YACgkQJNaLcl1U h9AOCwf+OerN1+mzW9/0IjP9fXY5wok+REaliBdQNCxxSEl/snEQ7luADrnORRq8 DT1fhc5ANklKGYAIzyPsjMBAdZi4fR8tKHL3WPuPVqT3qBWcqUSW4R4Mhte3XvDR PQzkrqEedjqVwOmyg+vdQ/0C4r/QwVXLvNbQVNCKEEFq8F33xIUkf5risFgPn36b 3+Ilc5zXBc4Jk734QUR+g9ql73T33O6Dro5yKxYCXO1dDxv+GkbBWgtYO+mNPWgP b8entl/O6uaEVlStYe/f9mK7+AH9xFhdE8olsbk4Qi5C1BPQuAy1ZOFuTtF5nFvw kbzVJrh2uSfkLI7kaAwM2rU12SkyWQ== =ZWCg -----END PGP SIGNATURE----- --JpUNoCeyjQJaWYxw--