From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759393AbYFKPGZ (ORCPT ); Wed, 11 Jun 2008 11:06:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757559AbYFKPGE (ORCPT ); Wed, 11 Jun 2008 11:06:04 -0400 Received: from mail.suse.de ([195.135.220.2]:60416 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757433AbYFKPGC (ORCPT ); Wed, 11 Jun 2008 11:06:02 -0400 From: Stefan Assmann To: Thomas Gleixner Cc: Ingo Molnar , "H. Peter Anvin" , Jon Masters , Olaf Dabrunz , Stefan Assmann , LKML , Ihno Krumreich , Sven Dietrich , Daniel Gollub , Felix Foerster Subject: [PATCH 0/5] Boot IRQ quirks and rerouting [repost] Date: Wed, 11 Jun 2008 16:35:12 +0200 Message-Id: <12131949173532-git-send-email-sassmann@suse.de> X-Mailer: git-send-email 1.5.2.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These patches are against linux-2.6-tip, auto-x86-next. The AMD/ATI and Broadcomm patches are not included yet, we're working on getting things ready for submission. The patch for the bootirqquirk= parameter will be released later. When IRQ lines on secondary or higher IO-APICs are masked (as done by RT and others), many chipsets redirect IRQs on this line to the PIC, and thereby regularly to the first IO-APIC in the system. This causes spurious interrupts and can lead to disabled IRQ lines. Disabling this "boot interrupt" (as it is mostly used to supply all IRQs to the legacy PIC during boot) is chipset-specific. It is also not possible for all chips. This patchset disables the boot interrupt on chipsets where this is possible and where we know how to do it. Where disabling the boot interrupt is not possible, the patches provide a boot parameter pci=ioapicreroute to only use the boot interrupt (on the first IO-APIC) instead of the "original" line on the secondary (tertiary ...) IO-APIC. The original line remains masked, and IRQs always appear on the boot interrupt line on the first IO-APIC instead. A second boot parameter pci=noioapicquirk allows to disable all quirks that disable boot interrupts. All patches are co-authored by Stefan Assmann and Olaf Dabrunz. But according to Documentation/SubmittingPatches, the patch submission format allows only for one author. Documentation/kernel-parameters.txt | 7 ++++ arch/x86/pci/common.c | 9 +++++ drivers/acpi/pci_irq.c | 56 ++++++++++++++++++++++++++++++++++ drivers/pci/quirks.c | 59 +++++++++++++++++++++++++++++++++++- include/asm-x86/io_apic.h | 8 ++++ include/asm-x86/pci.h | 4 +- include/linux/pci.h | 7 +++- include/linux/pci_ids.h | 6 +++ 8 files changed, 151 insertions(+), 5 deletions(-)