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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C52E1C531DC for ; Fri, 23 Aug 2024 09:43:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=3RSYcbUQdyHRK25IRP/2YCvGRvrh4MwvPGVPxxkM7Fc=; b=MkriKg7pVv6MUeC0DgzVs3KmNj xGavcHygl7NyVlRluhrYqo5ZiJqoam2XreYFJUESb+T7VeDRdGbURaJsHpsBeeJbccXOYhUsija59 7wnMdFmIUhiqJo2cjeUJzwKu9Buu9BHF1Jk3YDT7Y9VkE/ey/3nxlkSuzbskjcYltueIqkiLOsbxp NPyA9Jm9HGrL3c8WK0nv7MmLIUpkAVlmFkfAygVOiu1iaeZAnTycA2svscdr++L4i0027yWXXHrWu aExmMYXPjShyIAEzRpVuLRncyi/TNnLX6D0XVDkpaOh5h4X75lz5gtO+0laVp3IY1JHs+ECZ8n99X Dm5TEISQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1shQpX-0000000GAX6-3smx; Fri, 23 Aug 2024 09:43:39 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1shQo0-0000000G9ui-1KwX; Fri, 23 Aug 2024 09:42:06 +0000 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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240823_024204_560652_E3356584 X-CRM114-Status: UNSURE ( 8.35 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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