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 764C3C5472C for ; Fri, 23 Aug 2024 09:42:07 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 078A480086; Fri, 23 Aug 2024 05:42:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F1C9380084; Fri, 23 Aug 2024 05:42:06 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DBCFF80086; Fri, 23 Aug 2024 05:42:06 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id BA99C80084 for ; Fri, 23 Aug 2024 05:42:06 -0400 (EDT) Received: from smtpin15.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 32D2741C60 for ; Fri, 23 Aug 2024 09:42:06 +0000 (UTC) X-FDA: 82483019052.15.1A453D4 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf14.hostedemail.com (Postfix) with ESMTP id 8E531100013 for ; Fri, 23 Aug 2024 09:42:04 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=none; spf=pass (imf14.hostedemail.com: domain of cmarinas@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1724406015; 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: in-reply-to:in-reply-to:references:references; bh=3RSYcbUQdyHRK25IRP/2YCvGRvrh4MwvPGVPxxkM7Fc=; b=QVqNf4vDH1hDvAZBY0gr/aQMAgrl3V+InUDxh7C06qpMeivb9oPUZ+3bmPdgDdn6euZUz4 GrkL26vPzvYjzE8dJbtiWJ2ZBFQ7IHoQajhT8KtL84dnPKOUeKgvqFagascxeJ1o5B1wo9 48usZOJPp3jQ9ska9ZgusysXp+VJNOY= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=none; spf=pass (imf14.hostedemail.com: domain of cmarinas@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1724406015; a=rsa-sha256; cv=none; b=oaCPrEIFpKLVImhJyND28rbPUzpxW0fw7eAViaYqvllitP/uCyuWxo4+8xDhZWBVXqaUCe +3qD/RbA5IFZC2h44P78tv+SQdMtSBv8PxPxXSyOmtO8Q/LBPUNngu3AnVENuojlgwEcPH lyH0rHdJTCUQb+2jX7AWg6kF3QR/Jrw= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id B32B26126E; Fri, 23 Aug 2024 09:42:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B0426C4AF0F; Fri, 23 Aug 2024 09:41:57 +0000 (UTC) Date: Fri, 23 Aug 2024 10:41:55 +0100 From: Catalin Marinas To: Mark Brown Cc: Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy , Kees Cook , "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , Thiago Jung Bauermann , Ross Burton , Yury Khrustalev , Wilco Dijkstra , 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 v11 26/39] arm64/ptrace: Expose GCS via ptrace and core files Message-ID: References: <20240822-arm64-gcs-v11-0-41b81947ecb5@kernel.org> <20240822-arm64-gcs-v11-26-41b81947ecb5@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240822-arm64-gcs-v11-26-41b81947ecb5@kernel.org> X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 8E531100013 X-Stat-Signature: qqwcstoeugzap9r9p1hxi4y48a5x3cgu X-Rspam-User: X-HE-Tag: 1724406124-679724 X-HE-Meta: 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 ow9xvtTo 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 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: List-Subscribe: List-Unsubscribe: On Thu, Aug 22, 2024 at 02:15:29AM +0100, Mark Brown wrote: > Provide a new register type NT_ARM_GCS reporting the current GCS mode > and pointer for EL0. Due to the interactions with allocation and > deallocation of Guarded Control Stacks we do not permit any changes to > the GCS mode via ptrace, only GCSPR_EL0 may be changed. > > Reviewed-by: Thiago Jung Bauermann > Signed-off-by: Mark Brown Reviewed-by: Catalin Marinas