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=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 59A1DC352A3 for ; Mon, 10 Feb 2020 16:59:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 390FB214DB for ; Mon, 10 Feb 2020 16:59:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727572AbgBJQ7B (ORCPT ); Mon, 10 Feb 2020 11:59:01 -0500 Received: from verein.lst.de ([213.95.11.211]:56630 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727558AbgBJQ7B (ORCPT ); Mon, 10 Feb 2020 11:59:01 -0500 Received: by verein.lst.de (Postfix, from userid 2407) id 057FD68B20; Mon, 10 Feb 2020 17:58:58 +0100 (CET) Date: Mon, 10 Feb 2020 17:58:57 +0100 From: "hch@lst.de" To: "Derrick, Jonathan" Cc: "hch@lst.de" , "mr.nuke.me@gmail.com" , "Shevchenko, Andriy" , "lorenzo.pieralisi@arm.com" , "linux-kernel@vger.kernel.org" , "mika.westerberg@linux.intel.com" , "helgaas@kernel.org" , "linux-pci@vger.kernel.org" , "Baldysiak, Pawel" , "okaya@kernel.org" , "kbusch@kernel.org" Subject: Re: [RFC 0/9] PCIe Hotplug Slot Emulation driver Message-ID: <20200210165857.GA19419@lst.de> References: <1581120007-5280-1-git-send-email-jonathan.derrick@intel.com> <20200210070115.GA7748@lst.de> <3a4de58ad83a88f90f372e162c39d09eeebd8043.camel@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <3a4de58ad83a88f90f372e162c39d09eeebd8043.camel@intel.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Mon, Feb 10, 2020 at 03:05:47PM +0000, Derrick, Jonathan wrote: > > The code seems like one giant hack to me. What is the real life > > use case for this? Another Intel chipset fuckup like vmd or the ahci > > remapping? > > > Exactly as the cover letter describes. An interposer being used on a > non-hotplug slot. That isn't a use a case, that iѕ a description of the implementation. Why would you want this code?