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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E8F2EB64DC for ; Mon, 17 Jul 2023 11:42:56 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E1B618D0001; Mon, 17 Jul 2023 07:42:55 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DCBC36B0075; Mon, 17 Jul 2023 07:42:55 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C6C788D0001; Mon, 17 Jul 2023 07:42:55 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id A9A7A6B0074 for ; Mon, 17 Jul 2023 07:42:55 -0400 (EDT) Received: from smtpin28.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 7E65F1C8CBE for ; Mon, 17 Jul 2023 11:42:55 +0000 (UTC) X-FDA: 81020917110.28.D166CD0 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by imf29.hostedemail.com (Postfix) with ESMTP id 7312C12001D for ; Mon, 17 Jul 2023 11:42:52 +0000 (UTC) Authentication-Results: imf29.hostedemail.com; dkim=none; spf=pass (imf29.hostedemail.com: domain of jonathan.cameron@huawei.com designates 185.176.79.56 as permitted sender) smtp.mailfrom=jonathan.cameron@huawei.com; dmarc=pass (policy=quarantine) header.from=huawei.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1689594172; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=o2iP2VrF7TW+aySGnHVAgLNX+paqRPBecPawZN1LyHg=; b=DhhQnxsweXrigvjcczii2dKC0SrWdlvfSzKeup5Zer596NVd3jWv9Jr5ms5Ph12p0c9E3p r2mXb2upAApGKZi+L0mfIs4WwvNwmxd/3sgMY0scfuJicyhu6Jo5SpCeMQ7cbmBEbhRN1C pz6acLy5aN+P0QLjk99owcPoXjoLbH0= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1689594172; a=rsa-sha256; cv=none; b=GMDtvYU+sYvAoBwXSqAXUYbsQ1gQUrDaoqfeGaICEeYfVAygGDrm53V8ASD/n8e5zG4K6o Y6zg2COPlYmRMyeOxiyu2N9NeGgZEaF+5qiFTGwvhdUmwWvsLqLGUX+5apNa6D/XklmWOw gMernOzspLVnMql001sN4I7Uejce8Y4= ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=none; spf=pass (imf29.hostedemail.com: domain of jonathan.cameron@huawei.com designates 185.176.79.56 as permitted sender) smtp.mailfrom=jonathan.cameron@huawei.com; dmarc=pass (policy=quarantine) header.from=huawei.com Received: from lhrpeml500005.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4R4Kqp1Psbz67Lnh; Mon, 17 Jul 2023 19:39:34 +0800 (CST) Received: from localhost (10.202.227.76) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Mon, 17 Jul 2023 12:42:48 +0100 Date: Mon, 17 Jul 2023 12:42:47 +0100 From: Jonathan Cameron To: Mark Brown CC: Catalin Marinas , 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 , Szabolcs Nagy , "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , , , , , , , , , Subject: Re: [PATCH 04/35] arm64/gcs: Document the ABI for Guarded Control Stacks Message-ID: <20230717124247.00001f1c@Huawei.com> In-Reply-To: <20230716-arm64-gcs-v1-4-bf567f93bba6@kernel.org> References: <20230716-arm64-gcs-v1-0-bf567f93bba6@kernel.org> <20230716-arm64-gcs-v1-4-bf567f93bba6@kernel.org> Organization: Huawei Technologies Research and Development (UK) Ltd. X-Mailer: Claws Mail 4.1.0 (GTK 3.24.33; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.202.227.76] X-ClientProxiedBy: lhrpeml500004.china.huawei.com (7.191.163.9) To lhrpeml500005.china.huawei.com (7.191.163.240) X-CFilter-Loop: Reflected X-Rspamd-Queue-Id: 7312C12001D X-Rspam-User: X-Stat-Signature: mxi7zyfui4kxaafiomq8ayswpp3tq5je X-Rspamd-Server: rspam03 X-HE-Tag: 1689594172-485146 X-HE-Meta: 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 P78V9Fb6 8/TfrHym52IkdAIyHPRClY4/2WnVoJtsuZSAuVxJAp6j8eEVGLwL8PUlY6JRULRc0YV+qA35206aEKxVI5/3w0XgFFDMlp5vMkrQJZZ3IAFV/8r0K0XXBt/FG8O6EifVzJP3jwmUySk0GpS4sJFX1vjE39/B2F/s9jzgt6p0X/qzRIvMouFjgRptZIIAXt1Hvi0fiXzoDOkqWqvAY1qIOOqyn/BdFsBvrTqhYnKkqiXYtR3ibWyy8djguFkEHOl40GK2vTHwzt/GRmfKgb058jaFRuXeShKFTfcf8ZrERom3FpBZRBvk/W6PdMnqPt0ZA8+0CnDtOD/Re/Oc= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun, 16 Jul 2023 22:51:00 +0100 Mark Brown wrote: > Add some documentation of the userspace ABI for Guarded Control Stacks. > > Signed-off-by: Mark Brown Hi Mark, Nice document. All I could find on a first read was one typo... ... > +7. ptrace extensions > +--------------------- > + > +* A new regset NT_ARM_GCS is defined for use with PTRACE_GETREGSET and > + PTRACE_SETREGSET. > + > +* Due to the complexity surrounding allocation and deallocation of stakcs and stacks > + lack of practical application changes to the GCS configuration via ptrace > + are not supported. > +