WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] [PATCH 12/17] xen: use acpi_get_override_irq() to get trigge

To: Ingo Molnar <mingo@xxxxxxx>
Subject: [Xen-devel] [PATCH 12/17] xen: use acpi_get_override_irq() to get triggering for legacy irqs
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 27 May 2009 00:37:25 -0700
Cc: Chris Wright <chrisw@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ky Srinivasan <ksrinivasan@xxxxxxxxxx>, kurt.hackel@xxxxxxxxxx, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Avi Kivity <avi@xxxxxxxxxx>, Jens Axboe <jens.axboe@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Greg KH <gregkh@xxxxxxx>
Delivery-date: Wed, 27 May 2009 00:53:56 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <1243409850-21577-1-git-send-email-jeremy@xxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <1243409850-21577-1-git-send-email-jeremy@xxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

We need to set up proper IO apic entries for legacy irqs, which are
not normally configured by either normal acpi interrupt routing or
PNP.

This also generalizes the acpi interrupt setup, so we can remove it
as a special case.

[ Impact: compatibility with legacy/ISA hardware ]

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
 arch/x86/xen/pci.c |   24 ++++++++++--------------
 1 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/arch/x86/xen/pci.c b/arch/x86/xen/pci.c
index 00ad6df..db0c74c 100644
--- a/arch/x86/xen/pci.c
+++ b/arch/x86/xen/pci.c
@@ -65,19 +65,15 @@ void __init xen_setup_pirqs(void)
 {
        int irq;
 
-#ifdef CONFIG_ACPI
-       /*
-        * Set up acpi interrupt in acpi_gbl_FADT.sci_interrupt.
-        */
-       if (acpi_gbl_FADT.sci_interrupt > 0) {
-               irq = xen_allocate_pirq(acpi_gbl_FADT.sci_interrupt);
-
-               printk(KERN_INFO "xen: allocated irq %d for acpi %d\n",
-                      irq, acpi_gbl_FADT.sci_interrupt);
-       }
-#endif
-
        /* Pre-allocate legacy irqs */
-       for (irq = 0; irq < NR_IRQS_LEGACY; irq++)
-               xen_allocate_pirq(irq);
+       for (irq = 0; irq < NR_IRQS_LEGACY; irq++) {
+               int trigger, polarity;
+
+               if (acpi_get_override_irq(irq, &trigger, &polarity) == -1)
+                       continue;
+
+               xen_register_gsi(irq,
+                       trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE,
+                       polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH);
+       }
 }
-- 
1.6.0.6


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>