From patchwork Tue Apr 21 14:26:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Catalin Marinas X-Patchwork-Id: 11501607 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 DCE56913 for ; Tue, 21 Apr 2020 14:27:15 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B490C206B9 for ; Tue, 21 Apr 2020 14:27:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B490C206B9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C2B6C8E001B; Tue, 21 Apr 2020 10:26:53 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id BB2B58E0003; Tue, 21 Apr 2020 10:26:53 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9DACA8E001B; Tue, 21 Apr 2020 10:26:53 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0077.hostedemail.com [216.40.44.77]) by kanga.kvack.org (Postfix) with ESMTP id 853648E0003 for ; Tue, 21 Apr 2020 10:26:53 -0400 (EDT) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 4F81D2C14 for ; Tue, 21 Apr 2020 14:26:53 +0000 (UTC) X-FDA: 76732088706.25.bears26_1efcf39c35127 X-Spam-Summary: 2,0,0,662d1a4f957934fe,d41d8cd98f00b204,catalin.marinas@arm.com,,RULES_HIT:41:355:379:541:800:960:973:988:989:1042:1260:1261:1311:1314:1345:1359:1437:1515:1534:1541:1711:1730:1747:1777:1792:2194:2199:2393:2559:2562:2693:3138:3139:3140:3141:3142:3353:3865:3866:3867:3870:3871:3874:4250:5007:6261:7576:7808:8634:10004:11026:11473:11658:11914:12043:12291:12296:12297:12438:12555:12679:12683:13069:13142:13230:13311:13357:13894:14093:14096:14110:14181:14384:14394:14721:21080:21230:21451:21627:21772:30054,0,RBL:217.140.110.172:@arm.com:.lbl8.mailshell.net-64.100.201.201 62.2.0.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:3,LUA_SUMMARY:none X-HE-Tag: bears26_1efcf39c35127 X-Filterd-Recvd-Size: 3124 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf46.hostedemail.com (Postfix) with ESMTP for ; Tue, 21 Apr 2020 14:26:52 +0000 (UTC) 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 82A8EC14; Tue, 21 Apr 2020 07:26:52 -0700 (PDT) Received: from localhost.localdomain (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 00BE13F68F; Tue, 21 Apr 2020 07:26:50 -0700 (PDT) From: Catalin Marinas To: linux-arm-kernel@lists.infradead.org Cc: Will Deacon , Vincenzo Frascino , Szabolcs Nagy , Richard Earnshaw , Kevin Brodsky , Andrey Konovalov , Peter Collingbourne , linux-mm@kvack.org, linux-arch@vger.kernel.org Subject: [PATCH v3 22/23] arm64: mte: Kconfig entry Date: Tue, 21 Apr 2020 15:26:02 +0100 Message-Id: <20200421142603.3894-23-catalin.marinas@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200421142603.3894-1-catalin.marinas@arm.com> References: <20200421142603.3894-1-catalin.marinas@arm.com> MIME-Version: 1.0 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: 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 Cc: Will Deacon --- arch/arm64/Kconfig | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 40fb05d96c60..af2e6e5dae1b 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1606,6 +1606,38 @@ config ARCH_RANDOM 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