From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763955AbZEHAYM (ORCPT ); Thu, 7 May 2009 20:24:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756715AbZEHAKd (ORCPT ); Thu, 7 May 2009 20:10:33 -0400 Received: from adsl-76-233-236-102.dsl.pltn13.sbcglobal.net ([76.233.236.102]:52705 "EHLO abulafia.goop.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755324AbZEHAKE (ORCPT ); Thu, 7 May 2009 20:10:04 -0400 From: Jeremy Fitzhardinge To: Ingo Molnar Cc: the arch/x86 maintainers , Linux Kernel Mailing List , Xen-devel , Gerd Hoffmann , Jeremy Fitzhardinge Subject: [PATCH 15/18] xen: fix legacy irq setup, make ioapic-less machines work. Date: Thu, 7 May 2009 14:14:40 -0700 Message-Id: <1241730883-4917-16-git-send-email-jeremy@goop.org> X-Mailer: git-send-email 1.6.0.6 In-Reply-To: <1241730883-4917-1-git-send-email-jeremy@goop.org> References: <1241730883-4917-1-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 Impact: compatibility with old machines If the machine has no IO APICs, then just allocate a set of legacy interrupts. 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 fb3ada9..69b475b 100644 --- a/arch/x86/xen/pci.c +++ b/arch/x86/xen/pci.c @@ -65,6 +65,12 @@ 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