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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 61471C3DA59 for ; Mon, 15 Jul 2024 09:23:02 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4WMxZF0m46z3dlY for ; Mon, 15 Jul 2024 19:23:01 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=anshuman.khandual@arm.com; receiver=lists.ozlabs.org) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4WMxYp0NNSz2ygY for ; Mon, 15 Jul 2024 19:22:36 +1000 (AEST) 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 E38B7DA7; Mon, 15 Jul 2024 02:22:30 -0700 (PDT) Received: from [10.162.40.16] (a077893.blr.arm.com [10.162.40.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 89DCE3F73F; Mon, 15 Jul 2024 02:21:57 -0700 (PDT) Message-ID: <388128db-1ddc-453f-9154-df2c5e255a2d@arm.com> Date: Mon, 15 Jul 2024 14:51:54 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 11/29] arm64: re-order MTE VM_ flags To: Joey Gouly , linux-arm-kernel@lists.infradead.org References: <20240503130147.1154804-1-joey.gouly@arm.com> <20240503130147.1154804-12-joey.gouly@arm.com> Content-Language: en-US From: Anshuman Khandual In-Reply-To: <20240503130147.1154804-12-joey.gouly@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: szabolcs.nagy@arm.com, catalin.marinas@arm.com, dave.hansen@linux.intel.com, linux-mm@kvack.org, hpa@zytor.com, shuah@kernel.org, maz@kernel.org, x86@kernel.org, christophe.leroy@csgroup.eu, aneesh.kumar@kernel.org, mingo@redhat.com, naveen.n.rao@linux.ibm.com, will@kernel.org, npiggin@gmail.com, broonie@kernel.org, bp@alien8.de, kvmarm@lists.linux.dev, tglx@linutronix.de, oliver.upton@linux.dev, aneesh.kumar@linux.ibm.com, linux-fsdevel@vger.kernel.org, akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 5/3/24 18:31, Joey Gouly wrote: > To make it easier to share the generic PKEYs flags, move the MTE flag. The change looks good but too less details about it here. Please do consider adding some more description, on how moving the VM flags down the arch range helps going forward. > > Signed-off-by: Joey Gouly > Cc: Catalin Marinas > Cc: Will Deacon > --- > include/linux/mm.h | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 5605b938acce..2065727b3787 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -377,8 +377,8 @@ extern unsigned int kobjsize(const void *objp); > #endif > > #if defined(CONFIG_ARM64_MTE) > -# define VM_MTE VM_HIGH_ARCH_0 /* Use Tagged memory for access control */ > -# define VM_MTE_ALLOWED VM_HIGH_ARCH_1 /* Tagged memory permitted */ > +# define VM_MTE VM_HIGH_ARCH_4 /* Use Tagged memory for access control */ > +# define VM_MTE_ALLOWED VM_HIGH_ARCH_5 /* Tagged memory permitted */ > #else > # define VM_MTE VM_NONE > # define VM_MTE_ALLOWED VM_NONE