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=-5.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT 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 A064FC31E5E for ; Wed, 19 Jun 2019 15:29:56 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 7927B21721 for ; Wed, 19 Jun 2019 15:29:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="JApjtI6D" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7927B21721 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+infradead-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=bombadil.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:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=w2nykgBYx2PN2LELHnNvIN7j72gg3VPjkEK6jNHfGTg=; b=JApjtI6DmUCSxS VItya9FmfP16WlUToTuSl22IjUCU9DBQPVeJT2PnAnxqq+CTQ/8+WtMmG6AafEvbsHw4m6NtSLyjG X0Y2snRxctIIiIa9bw3tV2PpAvOKKIgKa/CPu8Jv29rtVsGoiaWwLPcLsfrnZwCKBmG+lmwhKbttC CnHaTEe5qSH7H9Gvdgj3quSgR41euUgL6Db3JdAwdBv343I9UCNpNn41dfFR4IhxqvcbDvvWJl949 /jo0WG5Fxbyiy1dcgL7Gnx4gsePLN9wMR9vehWSkopsJJuWgES87UXumVyB7lc4Lqs/K2WgR0qCpg ST/JxRgSKYdJhBT7M3Kg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hdcX4-0005SI-E2; Wed, 19 Jun 2019 15:29:54 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hdcX1-0005Q9-0K for linux-arm-kernel@lists.infradead.org; Wed, 19 Jun 2019 15:29:52 +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 EF1DA344; Wed, 19 Jun 2019 08:29:45 -0700 (PDT) Received: from arrakis.emea.arm.com (arrakis.cambridge.arm.com [10.1.196.78]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4E94C3F246; Wed, 19 Jun 2019 08:29:41 -0700 (PDT) Date: Wed, 19 Jun 2019 16:29:39 +0100 From: Catalin Marinas To: Andrey Konovalov Subject: Re: [PATCH v17 03/15] arm64: Introduce prctl() options to control the tagged user addresses ABI Message-ID: <20190619152938.GD25211@arrakis.emea.arm.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190619_082951_096779_AB2D89DA X-CRM114-Status: GOOD ( 17.45 ) 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: Mark Rutland , kvm@vger.kernel.org, Szabolcs Nagy , Will Deacon , dri-devel@lists.freedesktop.org, Linux Memory Management List , Khalid Aziz , "open list:KERNEL SELFTEST FRAMEWORK" , Felix Kuehling , Vincenzo Frascino , Jacob Bramley , Leon Romanovsky , linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, Christoph Hellwig , Jason Gunthorpe , Dmitry Vyukov , Dave Martin , Evgeniy Stepanov , linux-media@vger.kernel.org, Kevin Brodsky , Kees Cook , Ruben Ayrapetyan , Ramana Radhakrishnan , Alex Williamson , Mauro Carvalho Chehab , Linux ARM , Kostya Serebryany , Greg Kroah-Hartman , Yishai Hadas , LKML , Jens Wiklander , Lee Smith , Alexander Deucher , Andrew Morton , enh , Robin Murphy , Christian Koenig , Luc Van Oostenryck Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jun 19, 2019 at 04:45:02PM +0200, Andrey Konovalov wrote: > On Wed, Jun 12, 2019 at 1:43 PM Andrey Konovalov wrote: > > From: Catalin Marinas > > > > It is not desirable to relax the ABI to allow tagged user addresses into > > the kernel indiscriminately. This patch introduces a prctl() interface > > for enabling or disabling the tagged ABI with a global sysctl control > > for preventing applications from enabling the relaxed ABI (meant for > > testing user-space prctl() return error checking without reconfiguring > > the kernel). The ABI properties are inherited by threads of the same > > application and fork()'ed children but cleared on execve(). > > > > The PR_SET_TAGGED_ADDR_CTRL will be expanded in the future to handle > > MTE-specific settings like imprecise vs precise exceptions. > > > > Signed-off-by: Catalin Marinas > > Catalin, would you like to do the requested changes to this patch > yourself and send it to me or should I do that? I'll send you an updated version this week. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel