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=-5.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 056CDC2D0A3 for ; Fri, 6 Nov 2020 11:09:40 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 7BDD120735 for ; Fri, 6 Nov 2020 11:09:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="jRjXQGl5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7BDD120735 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=R8OtPA2KE88yeS/GbZMKXkeFWVKjPw/SYALHYFn1PuY=; b=jRjXQGl5TVZ19VwXR83x8FHso AHXvZ5edkqB8OJNPdadKG2tsMDI/P5ai2hOIrg5RR/BQ+MbCfAZXRP14k7+PN+6eoaA1cmjqaJA8A C8HGRGgiEy/hW9nZeJCBYfX5fnZcT3xTl/8UPIt3XSOSpaAYgCC/xABCNPNPrrfGWMOvTNmqnJai+ l8bopwHUTMQx0q3cry7+o2lQLxfGg7ueKguRyN0+7FCE3Z4MBiMYT7BMCq0YZ3F9c5TKFJEdNrwWM GYufRivlyX9Y+VjKuyVM7h4eabnX7R3sP0HFe+Y44ATvpWx6dCbCUaGdVcHfuy6TmAtNryeQ/+SKk HTS686hag==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kazbb-0008DU-BF; Fri, 06 Nov 2020 11:08:31 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kazbY-0008BW-NH for linux-arm-kernel@lists.infradead.org; Fri, 06 Nov 2020 11:08:29 +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 E412E147A; Fri, 6 Nov 2020 03:08:23 -0800 (PST) Received: from [10.37.12.46] (unknown [10.37.12.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 62E103F719; Fri, 6 Nov 2020 03:08:21 -0800 (PST) Subject: Re: [PATCH v8 30/43] arm64: kasan: Allow enabling in-kernel MTE To: Andrey Konovalov , Catalin Marinas References: <5e3c76cac4b161fe39e3fc8ace614400bc2fb5b1.1604531793.git.andreyknvl@google.com> <20201105172549.GE30030@gaia> <20201105173901.GH30030@gaia> From: Vincenzo Frascino Message-ID: Date: Fri, 6 Nov 2020 11:11:21 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201106_060828_842145_B4767477 X-CRM114-Status: GOOD ( 12.62 ) 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 ARM , Marco Elver , Kevin Brodsky , Will Deacon , Branislav Rankov , kasan-dev , LKML , Linux Memory Management List , Alexander Potapenko , Dmitry Vyukov , Andrey Ryabinin , Andrew Morton , Evgenii Stepanov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Catalin, On 11/5/20 6:09 PM, Andrey Konovalov wrote: >> Ah, I got there eventually in patch 38. Too many indirections ;) (I'm >> sure we could have trimmed them down a bit, hw_init_tags == >> arch_init_tags == mte_init_tags). > The idea with these indirections was to make hw_tags.c to not directly > call MTE stuff and abstract away the underlying memory tagging > implementation. We won't know for sure how fitting these abstractions > are before we add another memory tagging implementation though :) > I agree with Andrey, because in future the sparc architecture might want to support HW KASAN hence keeping a generic infrastructure adds some value. -- Regards, Vincenzo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel