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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 54AB1C33CAF for ; Thu, 16 Jan 2020 22:13:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 262FD2073A for ; Thu, 16 Jan 2020 22:13:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389893AbgAPWNU (ORCPT ); Thu, 16 Jan 2020 17:13:20 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:53701 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732190AbgAPWNT (ORCPT ); Thu, 16 Jan 2020 17:13:19 -0500 Received: from p5b06da22.dip0.t-ipconnect.de ([91.6.218.34] helo=nanos.tec.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1isDO6-0002K7-E6; Thu, 16 Jan 2020 23:13:14 +0100 Received: by nanos.tec.linutronix.de (Postfix, from userid 1000) id D81E4101226; Thu, 16 Jan 2020 23:13:13 +0100 (CET) From: Thomas Gleixner To: Nicholas Johnson , "linux-kernel\@vger.kernel.org" Cc: x86@kernel.org, "H. Peter Anvin" , Bjorn Helgaas Subject: Re: [[RFC PATCH v1] 1/1] PCI: Add pci=nobbn to ignore ACPI _BBN method to override host bridge bus window In-Reply-To: References: Date: Thu, 16 Jan 2020 23:13:13 +0100 Message-ID: <87muandp8m.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Nicholas, Nicholas Johnson writes: > Add pci=nobbn kernel parameter. > > Override the host bridge bus resource to [bus 00-ff] when specified. Fine, but you completely fail to explain why this is useful and why someone would utilize this command line parameter. Thanks, tglx