From patchwork Wed Dec 11 18:40:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Catalin Marinas X-Patchwork-Id: 11285995 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 86942138D for ; Wed, 11 Dec 2019 18:46:01 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 5D86620663 for ; Wed, 11 Dec 2019 18:46:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Sx05CIyo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5D86620663 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=HIEId5QRR5enslGWSgsIeUh3omjE8Z0n+fKExvbG/UQ=; b=Sx05CIyoewLF31 Cymzhj6HksKxG6fvD479YZebuQfMfBOoIhpcqQYELX+OkrtGhp46FrvM96BFVpZEGsJWbDqPixEPQ FdH8ewmuBS+laVl5SMe1XBb2NpCMeqPbVTAPbUvx0sIpI5GeTCZxUO/0K8ATJ2KhFAB5Y/SYHtGrI 3y1+tcj2O4sfvG2fHvjhANxJFhQM4PGAT6Xqc61hWn9Ey0tprTggRMHEj7WPfIOiM5MxjlGQ3ccfQ NC0MV54oc0U+hA4s6PPd33eRCOeBjZ5uBKejLCCQPY/w+4kzx638aX5Y3vA9ibKRxcp+2/1BWX8A1 FyEZnaMHg9v98MJtxxVg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1if6zo-0000wQ-TC; Wed, 11 Dec 2019 18:46:00 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1if6vA-0003RU-M8 for linux-arm-kernel@lists.infradead.org; Wed, 11 Dec 2019 18:41:14 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 847B41500; Wed, 11 Dec 2019 10:41:12 -0800 (PST) Received: from arrakis.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 1B8E63F6CF; Wed, 11 Dec 2019 10:41:11 -0800 (PST) From: Catalin Marinas To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 21/22] arm64: mte: Kconfig entry Date: Wed, 11 Dec 2019 18:40:26 +0000 Message-Id: <20191211184027.20130-22-catalin.marinas@arm.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191211184027.20130-1-catalin.marinas@arm.com> References: <20191211184027.20130-1-catalin.marinas@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191211_104112_802655_3E9DB59D X-CRM114-Status: UNSURE ( 9.75 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [217.140.110.172 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Richard Earnshaw , Szabolcs Nagy , Marc Zyngier , Kevin Brodsky , linux-mm@kvack.org, Andrey Konovalov , Vincenzo Frascino , Will Deacon Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Vincenzo Frascino Add Memory Tagging Extension support to the arm64 kbuild. Signed-off-by: Vincenzo Frascino Co-developed-by: Catalin Marinas Signed-off-by: Catalin Marinas --- arch/arm64/Kconfig | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b1b4476ddb83..9a119c402bde 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1484,6 +1484,38 @@ config ARM64_PTR_AUTH endmenu +menu "ARMv8.5 architectural features" + +config ARM64_AS_HAS_MTE + def_bool $(as-instr,.arch armv8.5-a+memtag) + +config ARM64_MTE + bool "Memory Tagging Extension support" + depends on ARM64_AS_HAS_MTE && ARM64_TAGGED_ADDR_ABI + select ARCH_USES_HIGH_VMA_FLAGS + select ARCH_NO_SWAP + help + Memory Tagging (part of the ARMv8.5 Extensions) provides + architectural support for run-time, always-on detection of + various classes of memory error to aid with software debugging + to eliminate vulnerabilities arising from memory-unsafe + languages. + + This option enables the support for the Memory Tagging + Extension at EL0 (i.e. for userspace). + + Selecting this option allows the feature to be detected at + runtime. Any secondary CPU not implementing this feature will + not be allowed a late bring-up. + + Userspace binaries that want to use this feature must + explicitly opt in. The mechanism for the userspace is + described in: + + Documentation/arm64/memory-tagging-extension.rst. + +endmenu + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y