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=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 EDAA2C433DF for ; Fri, 9 Oct 2020 10:59:05 +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 67B0420709 for ; Fri, 9 Oct 2020 10:59:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="qJefH/CM"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="LDySZdo8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67B0420709 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linuxfoundation.org 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: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=jCtmMYYsmdWaWPVDq953XWXFKU560uxKdjERDqKfgO4=; b=qJefH/CM/ACMqWStgO4jWuc2R Aq9JazJVkWiTH+mZNcG13Zu3NmuUXaWhwQnrSbEu5MGzwRlQUEkeZFBokhyQGuucc9XRq9rUhJpcC oRba3iH6QcDE5UlfZ/YJyQ3UWJ9dqNxUWopC5q3UpRPthneX75B9FQ6rPH4+jyMrxXPXQUCk6u5ea YKsvATkIsrNp8xQqvNOuTpg4H+wbz/lnZZljv2gr53WCXusVjerNmcemJOtUrUE4XzxnTmNl1UHV7 PwZQBjDpuo1gh5f8rQ28ofL6KEGw8vtDNxgJt/ucv5aRSWSfMBG4LMVZ4lPZPgHmk42WJqAQE/iyf P/yIaom3A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kQq5S-0006B9-ES; Fri, 09 Oct 2020 10:57:22 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kQq5P-00069p-Lk for linux-arm-kernel@lists.infradead.org; Fri, 09 Oct 2020 10:57:20 +0000 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7B50922277; Fri, 9 Oct 2020 10:57:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602241038; bh=kHOFqclHrdBBz1Ryt/WeaTaY4X02dr3AcOscUBLI+pU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=LDySZdo8ogOvvFAvfoOvwcvjxWeR1WwNSfI9D3bnjZKGkyyun/LM2tvFaBCG2rEo6 nVoZ0deBG7KOCK5o+s/18boeFzFxdFlCSaBF1AkNBr4eEngIikwngVuVjouAM14YHd XY8m3BRogYTEIV0Cm2EMOXkh5ALWcoubP/dOjosw= Date: Fri, 9 Oct 2020 12:58:03 +0200 From: Greg Kroah-Hartman To: Daniel Vetter Subject: Re: [PATCH v2 15/17] sysfs: Support zapping of binary attr mmaps Message-ID: <20201009105803.GA505688@kroah.com> References: <20201009075934.3509076-1-daniel.vetter@ffwll.ch> <20201009075934.3509076-16-daniel.vetter@ffwll.ch> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201009075934.3509076-16-daniel.vetter@ffwll.ch> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201009_065719_878536_F8A6E58E X-CRM114-Status: GOOD ( 20.41 ) 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: Jan Kara , kvm@vger.kernel.org, "Rafael J. Wysocki" , linux-pci@vger.kernel.org, DRI Development , linux-mm@kvack.org, Daniel Vetter , Christian Brauner , linux-s390@vger.kernel.org, linux-samsung-soc@vger.kernel.org, Mauro Carvalho Chehab , Michael Ellerman , Nayna Jain , Jason Gunthorpe , linux-media@vger.kernel.org, Kees Cook , John Hubbard , =?iso-8859-1?B?Suly9G1l?= Glisse , Bjorn Helgaas , Dan Williams , linux-arm-kernel@lists.infradead.org, LKML , Sourabh Jain , Andrew Morton , "David S. Miller" Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Oct 09, 2020 at 09:59:32AM +0200, Daniel Vetter wrote: > We want to be able to revoke pci mmaps so that the same access rules > applies as for /dev/kmem. Revoke support for devmem was added in > 3234ac664a87 ("/dev/mem: Revoke mappings when a driver claims the > region"). > = > The simplest way to achieve this is by having the same filp->f_mapping > for all mappings, so that unmap_mapping_range can find them all, no > matter through which file they've been created. Since this must be set > at open time we need sysfs support for this. > = > Add an optional mapping parameter bin_attr, which is only consulted > when there's also an mmap callback, since without mmap support > allowing to adjust the ->f_mapping makes no sense. > = > Signed-off-by: Daniel Vetter > Cc: Jason Gunthorpe > Cc: Kees Cook > Cc: Dan Williams > Cc: Andrew Morton > Cc: John Hubbard > Cc: J=E9r=F4me Glisse > Cc: Jan Kara > Cc: Dan Williams > Cc: linux-mm@kvack.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-samsung-soc@vger.kernel.org > Cc: linux-media@vger.kernel.org > Cc: Bjorn Helgaas > Cc: linux-pci@vger.kernel.org > Cc: Greg Kroah-Hartman > Cc: "Rafael J. Wysocki" > Cc: Christian Brauner > Cc: "David S. Miller" > Cc: Michael Ellerman > Cc: Sourabh Jain > Cc: Daniel Vetter > Cc: Mauro Carvalho Chehab > Cc: Nayna Jain > --- > fs/sysfs/file.c | 11 +++++++++++ > include/linux/sysfs.h | 2 ++ > 2 files changed, 13 insertions(+) Reviewed-by: Greg Kroah-Hartman _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel