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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 B3E28C433DF for ; Fri, 15 May 2020 17:25:09 +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 3E82420727 for ; Fri, 15 May 2020 17:25:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="e5jxLv+P" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3E82420727 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.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=Z/YZ992yX9CZuM4MX0GwE5mfMw6xR/3uEP4HMAbjyRY=; b=e5jxLv+PWjgYRj iM0lZHZPrHUng6/IMhAMuQ4kcUKdc2mUQ2Y07RCPEUbJ87wsSCQ+pr/3IKYJxSRx+oIm4Qcx4oiJ3 vg5r8KrEnBzBLDrC2bTXFk0Kxf9hxXXpFOW3PhBAnHs+DkwSbPWHmdCwx3+Bz7hgUt/WegQ7RXtBz /RBtp2ocNW89UK3/WcFNtFOZzRnG2QG9B11OOwoO9Vu+EnuVLiDzIcTTmPCkrvPYxW4JTvGwCZi7Y YLsvEqip4l++IOF6+z49L4EMhjj5OU+fisid+LwTz7oYyVup0HOn+YJtT/Nie+BIYeV3xI0BHzRU9 UWVssyxHdMLac0DGZDPA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZe54-0003k8-I8; Fri, 15 May 2020 17:25:06 +0000 Received: from mga11.intel.com ([192.55.52.93]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZdzz-0005Cn-7d for linux-arm-kernel@lists.infradead.org; Fri, 15 May 2020 17:19:53 +0000 IronPort-SDR: +q+FQBNEsmxTe6OY0CNfN7+7bxf7UzpQbaIuqiARfujWmDn8ZZRkDAZUPYyhpEj5Bk1iD6A0Ir NOX6z1jSEtVQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 May 2020 10:19:49 -0700 IronPort-SDR: eZEoXLPhr5Cv4k9IWYM8gN4137BapxcAi4vssr/dR789L2+dXVQmk1JPIhPZN2nFL5mp2ML7hg BUSPg6BHnf6w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,396,1583222400"; d="scan'208";a="281283658" Received: from otc-nc-03.jf.intel.com (HELO otc-nc-03) ([10.54.39.25]) by orsmga002.jf.intel.com with ESMTP; 15 May 2020 10:19:49 -0700 Date: Fri, 15 May 2020 10:19:49 -0700 From: "Raj, Ashok" To: Christoph Hellwig Subject: Re: [PATCH 0/4] PCI, iommu: Factor 'untrusted' check for ATS enablement Message-ID: <20200515171948.GC75440@otc-nc-03> References: <20200515104359.1178606-1-jean-philippe@linaro.org> <20200515154351.GA6546@infradead.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200515154351.GA6546@infradead.org> User-Agent: Mutt/1.5.24 (2015-08-30) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200515_101951_515120_8614B2F9 X-CRM114-Status: UNSURE ( 9.41 ) X-CRM114-Notice: Please train this message. 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: Jean-Philippe Brucker , Ashok Raj , linux-pci@vger.kernel.org, joro@8bytes.org, alex.williamson@redhat.com, iommu@lists.linux-foundation.org, bhelgaas@google.com, baolu.lu@linux.intel.com, will@kernel.org, dwmw2@infradead.org, linux-arm-kernel@lists.infradead.org, robin.murphy@arm.com 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 Hi Christoph On Fri, May 15, 2020 at 08:43:51AM -0700, Christoph Hellwig wrote: > Can you please lift the untrusted flag into struct device? It really > isn't a PCI specific concept, and we should not have code poking into > pci_dev all over the iommu code. Just for clarification: All IOMMU's today mostly pertain to only PCI devices and for devices that aren't PCI like HPET for instance we give a PCI identifier. Facilities like ATS for instance require the platform to have an IOMMU. what additional problems does moving this to struct device solve? Cheers, Ashok _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel