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 X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 356BAC4363D for ; Fri, 25 Sep 2020 10:16:53 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A848521741 for ; Fri, 25 Sep 2020 10:16:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A848521741 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 1127F6B0068; Fri, 25 Sep 2020 06:16:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0C3216B006C; Fri, 25 Sep 2020 06:16:52 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 001118E0001; Fri, 25 Sep 2020 06:16:51 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0066.hostedemail.com [216.40.44.66]) by kanga.kvack.org (Postfix) with ESMTP id E0E7C6B0068 for ; Fri, 25 Sep 2020 06:16:51 -0400 (EDT) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id A776C181AE863 for ; Fri, 25 Sep 2020 10:16:51 +0000 (UTC) X-FDA: 77301180222.26.fan88_4a13bac27166 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin26.hostedemail.com (Postfix) with ESMTP id 823AB1804B671 for ; Fri, 25 Sep 2020 10:16:51 +0000 (UTC) X-HE-Tag: fan88_4a13bac27166 X-Filterd-Recvd-Size: 2198 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf46.hostedemail.com (Postfix) with ESMTP for ; Fri, 25 Sep 2020 10:16:50 +0000 (UTC) Received: from gaia (unknown [31.124.44.166]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6613620717; Fri, 25 Sep 2020 10:16:47 +0000 (UTC) Date: Fri, 25 Sep 2020 11:16:44 +0100 From: Catalin Marinas To: Andrey Konovalov Cc: Dmitry Vyukov , Vincenzo Frascino , kasan-dev@googlegroups.com, Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Will Deacon , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 23/39] arm64: Enable armv8.5-a asm-arch option Message-ID: <20200925101644.GC4846@gaia> References: <878fb755aed45104a44f2737d4244c14fdd1b9cd.1600987622.git.andreyknvl@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <878fb755aed45104a44f2737d4244c14fdd1b9cd.1600987622.git.andreyknvl@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) 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 Fri, Sep 25, 2020 at 12:50:30AM +0200, Andrey Konovalov wrote: > From: Vincenzo Frascino > > Hardware tag-based KASAN relies on Memory Tagging Extension (MTE) which > is an armv8.5-a architecture extension. > > Enable the correct asm option when the compiler supports it in order to > allow the usage of ALTERNATIVE()s with MTE instructions. > > Signed-off-by: Vincenzo Frascino > Signed-off-by: Andrey Konovalov Reviewed-by: Catalin Marinas