Mailing List Archive

# HG changeset patch
# User kaf24@firebug.cl.cam.ac.uk
# Node ID c2e93601eae576e2f3c7e332c41e6f37cb635b78
# Parent 572abc9efcf5dfcebc4ce3333dbe1ea245e1dd34
Add IO-APIC interrupt debugging to 'i' debug key.

Signed-off-by: Keir Fraser <keir@xensource.com>

diff -r 572abc9efcf5 -r c2e93601eae5 xen/arch/x86/io_apic.c
--- a/xen/arch/x86/io_apic.c Wed Jan 4 13:45:52 2006
+++ b/xen/arch/x86/io_apic.c Wed Jan 4 17:37:24 2006
@@ -1807,3 +1807,47 @@

return 0;
}
+
+void dump_ioapic_irq_info(void)
+{
+ struct irq_pin_list *entry;
+ struct IO_APIC_route_entry rte;
+ unsigned int irq, pin, printed = 0;
+ unsigned long flags;
+
+ for ( irq = 0; irq < NR_IRQS; irq++ )
+ {
+ entry = &irq_2_pin[irq];
+ if ( entry->pin == -1 )
+ continue;
+
+ if ( !printed++ )
+ printk("IO-APIC interrupt information:\n");
+
+ printk(" IRQ%3d Vec%3d:\n", irq, irq_to_vector(irq));
+
+ for ( ; ; )
+ {
+ pin = entry->pin;
+
+ printk(" Apic 0x%02x, Pin %2d: ", entry->apic, pin);
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ *(((int *)&rte) + 0) = io_apic_read(entry->apic, 0x10 + 2 * pin);
+ *(((int *)&rte) + 1) = io_apic_read(entry->apic, 0x11 + 2 * pin);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ printk("vector=%u, delivery_mode=%u, dest_mode=%s, "
+ "delivery_status=%d, polarity=%d, irr=%d, "
+ "trigger=%s, mask=%d\n",
+ rte.vector, rte.delivery_mode,
+ rte.dest_mode ? "logical" : "physical",
+ rte.delivery_status, rte.polarity, rte.irr,
+ rte.trigger ? "level" : "edge", rte.mask);
+
+ if ( entry->next == 0 )
+ break;
+ entry = &irq_2_pin[entry->next];
+ }
+ }
+}
diff -r 572abc9efcf5 -r c2e93601eae5 xen/arch/x86/irq.c
--- a/xen/arch/x86/irq.c Wed Jan 4 13:45:52 2006
+++ b/xen/arch/x86/irq.c Wed Jan 4 17:37:24 2006
@@ -313,6 +313,8 @@
return 0;
}

+extern void dump_ioapic_irq_info(void);
+
static void dump_irqs(unsigned char key)
{
int i, irq, vector;
@@ -321,6 +323,8 @@
struct domain *d;
unsigned long flags;

+ printk("Guest interrupt information:\n");
+
for ( irq = 0; irq < NR_IRQS; irq++ )
{
vector = irq_to_vector(irq);
@@ -335,7 +339,7 @@
{
action = (irq_guest_action_t *)desc->action;

- printk("IRQ%3d Vec%3d: type=%-15s status=%08x "
+ printk(" IRQ%3d Vec%3d: type=%-15s status=%08x "
"in-flight=%d domain-list=",
irq, vector, desc->handler->typename,
desc->status, action->in_flight);
@@ -366,6 +370,8 @@

spin_unlock_irqrestore(&desc->lock, flags);
}
+
+ dump_ioapic_irq_info();
}

static int __init setup_dump_irqs(void)

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