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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable 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 5A8FAC04EBC for ; Fri, 16 Nov 2018 09:32:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 231B22089D for ; Fri, 16 Nov 2018 09:32:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 231B22089D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389114AbeKPTnq (ORCPT ); Fri, 16 Nov 2018 14:43:46 -0500 Received: from mga02.intel.com ([134.134.136.20]:29113 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727398AbeKPTnq (ORCPT ); Fri, 16 Nov 2018 14:43:46 -0500 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Nov 2018 01:32:16 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,239,1539673200"; d="scan'208";a="109077639" Received: from lahna.fi.intel.com (HELO lahna) ([10.237.72.157]) by orsmga002.jf.intel.com with SMTP; 16 Nov 2018 01:32:08 -0800 Received: by lahna (sSMTP sendmail emulation); Fri, 16 Nov 2018 11:32:10 +0200 Date: Fri, 16 Nov 2018 11:32:10 +0200 From: Mika Westerberg To: Christoph Hellwig Cc: Yehezkel Bernat , ashok.raj@intel.com, Mario Limonciello , michael.jamet@intel.com, Christian Kellner , rjw@rjwysocki.net, Anthony Wong , LKML , Andreas Noever , iommu@lists.linux-foundation.org, lukas@wunner.de, jacob.jun.pan@intel.com, linux-pci@vger.kernel.org, Bjorn Helgaas , linux-acpi@vger.kernel.org, David Woodhouse Subject: Re: [PATCH 1/4] PCI / ACPI: Identify external PCI devices Message-ID: <20181116093210.GK4179@lahna.fi.intel.com> References: <20181113114527.GA12821@e107981-ln.cambridge.arm.com> <20181115102239.GU2500@lahna.fi.intel.com> <20181115111356.GA599@e107981-ln.cambridge.arm.com> <20181115113737.GW2500@lahna.fi.intel.com> <20181115120736.pscly6zwd3k2tvd2@wunner.de> <20181115121627.GA2500@lahna.fi.intel.com> <20181115174608.GA17691@e107981-ln.cambridge.arm.com> <20181115191026.GE4179@lahna.fi.intel.com> <20181116091804.GA4548@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181116091804.GA4548@infradead.org> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 16, 2018 at 01:18:04AM -0800, Christoph Hellwig wrote: > On Thu, Nov 15, 2018 at 09:10:26PM +0200, Mika Westerberg wrote: > > FireWire is kind of different but there are connectors such as > > ExpressCard and NVMe (over U.2 connector) which carry PCIe and are > > relatively easy to access without need for a screwdriver. AFAIK some > > eGPUs are also using some other proprietary (non-TBT) connector that > > carries PCIe. > > U.2 is a data center internal form factor with hot plug capability. If > you enable an iommu for that by default you will make a lot of people > very unhappy. Well, it needs the other bit in ACPI DMAR table to be enabled by default so I don't think anyone in data center domain will notice ;-) > More importantly NVMe is now used for the current/next generation > Compact Flash and SD cards, which contain full PCIe gen 3 links. OK, thanks for the information - I did not know that. I guess those belong to the "external" category as well.