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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 D4398C433E0 for ; Mon, 1 Feb 2021 22:44:11 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 68F9B64ED0 for ; Mon, 1 Feb 2021 22:44:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 68F9B64ED0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E0B4D6B0006; Mon, 1 Feb 2021 17:44:10 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id DE23D6B006E; Mon, 1 Feb 2021 17:44:10 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D1E546B0070; Mon, 1 Feb 2021 17:44:10 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0107.hostedemail.com [216.40.44.107]) by kanga.kvack.org (Postfix) with ESMTP id BA9CB6B0006 for ; Mon, 1 Feb 2021 17:44:10 -0500 (EST) Received: from smtpin20.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 80724180AD81F for ; Mon, 1 Feb 2021 22:44:10 +0000 (UTC) X-FDA: 77771178660.20.humor76_3512fbb275c5 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin20.hostedemail.com (Postfix) with ESMTP id 60F08180C07AB for ; Mon, 1 Feb 2021 22:44:10 +0000 (UTC) X-HE-Tag: humor76_3512fbb275c5 X-Filterd-Recvd-Size: 2843 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf50.hostedemail.com (Postfix) with ESMTP for ; Mon, 1 Feb 2021 22:44:09 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 2619D64ECC; Mon, 1 Feb 2021 22:44:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1612219448; bh=bY5TMOz0te68qLVeDd3OlEIhLNM0l3Gtrel8LOEYnS0=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Hhq7UvD4wMRGOAqhcU/qsOVoDxHKVK4v+m5plQ3IOEyAVCqYZWoarIQ61bAGp2NDW AMCIZRU6gRuxKGLC0odOIFPLShjvVOdNBD1kgPCNR7otmV3AUuvuYF0ewt3n2llhfd KgyxYOikqbFtLbW479v5j5+9fDNqLOIzANLFubQE= Date: Mon, 1 Feb 2021 14:44:07 -0800 From: Andrew Morton To: Andrey Konovalov Cc: Catalin Marinas , Vincenzo Frascino , Dmitry Vyukov , Alexander Potapenko , Marco Elver , Will Deacon , Andrey Ryabinin , Peter Collingbourne , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 10/12] arm64: kasan: simplify and inline MTE functions Message-Id: <20210201144407.dd603ec4edcd589643654057@linux-foundation.org> In-Reply-To: <17d6bef698d193f5fe0d8baee0e232a351e23a32.1612208222.git.andreyknvl@google.com> References: <17d6bef698d193f5fe0d8baee0e232a351e23a32.1612208222.git.andreyknvl@google.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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 Mon, 1 Feb 2021 20:43:34 +0100 Andrey Konovalov wrote: > This change provides a simpler implementation of mte_get_mem_tag(), > mte_get_random_tag(), and mte_set_mem_tag_range(). > > Simplifications include removing system_supports_mte() checks as these > functions are onlye called from KASAN runtime that had already checked > system_supports_mte(). Besides that, size and address alignment checks > are removed from mte_set_mem_tag_range(), as KASAN now does those. > > This change also moves these functions into the asm/mte-kasan.h header > and implements mte_set_mem_tag_range() via inline assembly to avoid > unnecessary functions calls. > > Co-developed-by: Vincenzo Frascino > Signed-off-by: Andrey Konovalov Co-developed-by requires a Signed-off-by: as well. Vincenzo, please send us one?