Received: by 2002:a25:8b91:0:0:0:0:0 with SMTP id j17csp8449852ybl; Thu, 16 Jan 2020 17:06:31 -0800 (PST) X-Google-Smtp-Source: APXvYqwfvVOc1ihtSk/nQnAoLCpbZzXRv46JEYP1YJtOZKxd9zI/jOIxXK1VDAS9dlobBkQE79Gt X-Received: by 2002:a05:6808:907:: with SMTP id w7mr1624548oih.91.1579223191402; Thu, 16 Jan 2020 17:06:31 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1579223191; cv=none; d=google.com; s=arc-20160816; b=TphwWETmSz8HmnejvcglL7A/Sah4gPWKLmn6I2ck3wn7PcyvQp+tD9kHhbVQetvlg6 SWIVCDbbRB0tylDnxQ4FOjAzBr0+vmsGxWYT+5I79evyPSSYZ4JLos0Jc8PeNpIjAgRz IWyDjUOz01PcoNDc0PP6fNR1XCg1J4p+PJp7cTuJrM8LmpO9UJ7K3LoNSDAx6QejFiO+ wwHXV8p3CMrBRVyfC2bPXVeNIrKmwd+Su5k9o+TJdL56nXufVgfzL0qDRVa8kySFxKhT Oup+r3UBLJr5yyavJvJUkx8CSX50pl1AV8J+JnG8FtV4N1dHxrnvMrk+oULDte0/MwwX UMXA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:message-id:date:references :in-reply-to:subject:cc:to:from; bh=/JN2darjrqgPuFzwU5FdWqd0YqS8z2gXhAFZJ0koz/Y=; b=Y50Em3bozhlUQhJ1jx5c3Qv5BjUv5xzNeuVQdpsd6UNMv9wZU7x/x+FrsAn7DLTOij I+ijzNSsxIh+FLzCRDGN5U7JygULWI23GCpMxtz99E+pu8tI7lvRuA/fopEgA/FYCD1U qLVBAiWZnDY+bPsJw9OWsC7EQn/0KsD0845eOYwb2F6Y6Qngq0HM/cr3y565Y4YOzdwq 4upS7zomElHhA4W3W/VaCIAwJ7sRzuHp1a0ZN29Rl3D0AyGDOrRw1FhGN4TowMPMzo6O UOVPYKlKOQ3PERj2tJ1MqYnfw/dDdCtlSgZa3Z9vFVN2td08rDIU2fBzVuVvVKcXq1oB b1DA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 8si13821209ota.266.2020.01.16.17.06.19; Thu, 16 Jan 2020 17:06:31 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388745AbgAPWNU (ORCPT + 99 others); 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