From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763592AbZE0Hna (ORCPT ); Wed, 27 May 2009 03:43:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763949AbZE0HiZ (ORCPT ); Wed, 27 May 2009 03:38:25 -0400 Received: from claw.goop.org ([74.207.240.146]:48072 "EHLO claw.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763883AbZE0HiY (ORCPT ); Wed, 27 May 2009 03:38:24 -0400 From: Jeremy Fitzhardinge To: Ingo Molnar Cc: the arch/x86 maintainers , Linux Kernel Mailing List , Xen-devel , Greg KH , Jens Axboe , Chris Wright , kurt.hackel@oracle.com, Andrew Morton , Ky Srinivasan , Beulich , Linus Torvalds , Avi Kivity , Gerd Hoffmann , Jeremy Fitzhardinge Subject: [PATCH 16/17] xen: fix legacy irq setup, make ioapic-less machines work. Date: Wed, 27 May 2009 00:37:29 -0700 Message-Id: <1243409850-21577-17-git-send-email-jeremy@goop.org> X-Mailer: git-send-email 1.6.0.6 In-Reply-To: <1243409850-21577-1-git-send-email-jeremy@goop.org> References: <1243409850-21577-1-git-send-email-jeremy@goop.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Gerd Hoffmann If the machine has no IO APICs, then just allocate a set of legacy interrupts. [ Impact: fix Xen compatibility with old machines ] Signed-off-by: Gerd Hoffmann Signed-off-by: Jeremy Fitzhardinge --- arch/x86/xen/pci.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/arch/x86/xen/pci.c b/arch/x86/xen/pci.c index 4b286f1..07b59fe 100644 --- a/arch/x86/xen/pci.c +++ b/arch/x86/xen/pci.c @@ -66,6 +66,12 @@ void __init xen_setup_pirqs(void) { int irq; + if (0 == nr_ioapics) { + for (irq = 0; irq < NR_IRQS_LEGACY; irq++) + xen_allocate_pirq(irq, "xt-pic"); + return; + } + /* Pre-allocate legacy irqs */ for (irq = 0; irq < NR_IRQS_LEGACY; irq++) { int trigger, polarity; -- 1.6.0.6