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=-11.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,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 93BE4C433E1 for ; Thu, 27 Aug 2020 11:05:18 +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 5152622BF3 for ; Thu, 27 Aug 2020 11:05:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fC+jiVaA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5152622BF3 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+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=6ONkHM+tApuiyQYqkD9t4SPso1qN+FVD/HWPXKhQYIY=; b=fC+jiVaAowGN8GNyXn3q5lrkC AADDw+HFy3/D34e7G/8i/hWfZJIXmIJ0X0jhCTZ3qaKr0rhKQJvj/W8DvOgY0Keq1xV2s8eBgWX7Q F7QNxx0gIwh4tmqedaZ0oGOrgCUhTjukU7Z7Ie1KPODS1ysc9QvwiWRirG4SHwRr/BSMizxUY5p4q YeymN4D7i2hYFEW1U54jmO3rhfEeH8Fv9kKev7t9j5w/XOiyIxDHS53mZsmKAzntv0fGKo5lUY2yq 9h4Ntoik6sXQAXI2huTWL/I/FIh1nwLVP7MvBBKWEdlpZtVYluWVvHRmcq6iCF08vy2G+84s7TPlY ddnNtVqgA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kBFh7-0002yW-VN; Thu, 27 Aug 2020 11:03:49 +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 1kBFh5-0002y2-Oj for linux-arm-kernel@lists.infradead.org; Thu, 27 Aug 2020 11:03:48 +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 AD5041045; Thu, 27 Aug 2020 04:03:44 -0700 (PDT) Received: from [192.168.1.190] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 858883F68F; Thu, 27 Aug 2020 04:03:42 -0700 (PDT) Subject: Re: [PATCH 26/35] kasan, arm64: Enable TBI EL1 To: Catalin Marinas , Andrey Konovalov References: <518da1e5169a4e343caa3c37feed5ad551b77a34.1597425745.git.andreyknvl@google.com> <20200827104033.GF29264@gaia> From: Vincenzo Frascino Message-ID: <9c53dfaa-119e-b12e-1a91-1f67f4aef503@arm.com> Date: Thu, 27 Aug 2020 12:05:55 +0100 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: <20200827104033.GF29264@gaia> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200827_070347_876865_87FDD58E X-CRM114-Status: GOOD ( 15.50 ) 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-kernel@lists.infradead.org, Marco Elver , Elena Petrova , Kevin Brodsky , Will Deacon , Branislav Rankov , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, 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 On 8/27/20 11:40 AM, Catalin Marinas wrote: > On Fri, Aug 14, 2020 at 07:27:08PM +0200, Andrey Konovalov wrote: >> diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S >> index 152d74f2cc9c..6880ddaa5144 100644 >> --- a/arch/arm64/mm/proc.S >> +++ b/arch/arm64/mm/proc.S >> @@ -38,7 +38,7 @@ >> /* PTWs cacheable, inner/outer WBWA */ >> #define TCR_CACHE_FLAGS TCR_IRGN_WBWA | TCR_ORGN_WBWA >> >> -#ifdef CONFIG_KASAN_SW_TAGS >> +#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS) >> #define TCR_KASAN_FLAGS TCR_TBI1 >> #else >> #define TCR_KASAN_FLAGS 0 > > I prefer to turn TBI1 on only if MTE is present. So on top of the v8 > user series, just do this in __cpu_setup. > Not sure I understand... Enabling TBI1 only if MTE is present would break KASAN_SW_TAGS which is based on TBI1 but not on MTE. -- Regards, Vincenzo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel