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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E27DC433EF for ; Tue, 28 Dec 2021 12:01:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230096AbhL1MBo (ORCPT ); Tue, 28 Dec 2021 07:01:44 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:54384 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230080AbhL1MBn (ORCPT ); Tue, 28 Dec 2021 07:01:43 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8A787611A1; Tue, 28 Dec 2021 12:01:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6C83C36AE8; Tue, 28 Dec 2021 12:01:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1640692902; bh=dpf3i7sjhIXaDkn8SthFB0jsZoBRTSFg7eTP6aY/SC8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=cN4QD1KP8rQOfSZWJcUJF6kjhcWMfJ7bsZb/f5oUmzKHLL7psqPmCS6g0Qkj/K564 7/rlEQ+Pe342cAd267FpeISixTvHGRK0P9C0wYDjAD6ufccb9veUMjKH50WqUkS/jg kHgfqD+MN2N2OGriHTomtwS+h+y4P/Fk7pKEHkJ8= Date: Tue, 28 Dec 2021 13:01:38 +0100 From: Greg Kroah-Hartman To: Niklas Schnelle Cc: Mauro Carvalho Chehab , Arnd Bergmann , Bjorn Helgaas , John Garry , Nick Hu , Greentime Hu , Vincent Chen , Paul Walmsley , Palmer Dabbelt , Albert Ou , Guo Ren , Damien Le Moal , Ian Abbott , H Hartley Sweeten , Linus Walleij , Bartosz Golaszewski , Jean Delvare , Guenter Roeck , Dmitry Torokhov , Karsten Keil , Hans Verkuil , Sathya Prakash , Sreekanth Reddy , Suganath Prabu Subramani , Michael Grzeschik , "David S. Miller" , Jakub Kicinski , Jesse Brandeburg , Tony Nguyen , Kalle Valo , Jouni Malinen , "James E.J. Bottomley" , "Martin K. Petersen" , Hannes Reinecke , Kashyap Desai , Sumit Saxena , Shivasharan S , Nilesh Javali , GR-QLogic-Storage-Upstream@marvell.com, Mark Brown , Sudip Mukherjee , Teddy Wang , Forest Bond , Jiri Slaby , Wim Van Sebroeck , Jaroslav Kysela , Takashi Iwai , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-pci@vger.kernel.org, linux-riscv@lists.infradead.org, linux-csky@vger.kernel.org, linux-ide@vger.kernel.org, linux-gpio@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-i2c@vger.kernel.org, linux-input@vger.kernel.org, netdev@vger.kernel.org, linux-media@vger.kernel.org, MPT-FusionLinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-wireless@vger.kernel.org, megaraidlinux.pdl@broadcom.com, linux-spi@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-serial@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-watchdog@vger.kernel.org, alsa-devel@alsa-project.org Subject: Re: [RFC 01/32] Kconfig: introduce and depend on LEGACY_PCI Message-ID: References: <20211227164317.4146918-1-schnelle@linux.ibm.com> <20211227164317.4146918-2-schnelle@linux.ibm.com> <20211228101435.3a55b983@coco.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-csky@vger.kernel.org On Tue, Dec 28, 2021 at 11:58:55AM +0100, Niklas Schnelle wrote: > We add both LEGACY_PCI and HAS_IOPORT to differentiate between two > cases. HAS_IOPORT is for PC-style devices that are not on a PCI card > while LEGACY_PCI is for PCI drivers that require port I/O. This > includes pre-PCIe devices as well as PCIe devices which require > features like I/O spaces. The "legacy" naming is comes from the PCIe > spec which in section 2.1.1.2 says "PCI Express supports I/O Space for > compatibility with legacy devices which require their use. Future > revisions of this specification may deprecate the use of I/O Space." Ah, then mention the reason why this is called LEGACY_PCI is that it is because that is what the PCI spec calls it. It was not obvious here at all that this is where the name came from. thanks, greg k-h