[IA64] pvops: add hooks, pv_iosapic_ops, to paravirtualize iosapic.
add hooks to paravirtualize iosapic which is a real hardware resource.
On virtualized environment it may be replaced something virtualized
friendly.
Define pv_iosapic_ops and add the hooks.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index 082c31d..587196d 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -587,6 +587,15 @@
return (iosapic_intr_info[irq].count > 1);
}
+struct irq_chip*
+ia64_native_iosapic_get_irq_chip(unsigned long trigger)
+{
+ if (trigger == IOSAPIC_EDGE)
+ return &irq_type_iosapic_edge;
+ else
+ return &irq_type_iosapic_level;
+}
+
static int
register_intr (unsigned int gsi, int irq, unsigned char delivery,
unsigned long polarity, unsigned long trigger)
@@ -637,13 +646,10 @@
iosapic_intr_info[irq].dmode = delivery;
iosapic_intr_info[irq].trigger = trigger;
- if (trigger == IOSAPIC_EDGE)
- irq_type = &irq_type_iosapic_edge;
- else
- irq_type = &irq_type_iosapic_level;
+ irq_type = iosapic_get_irq_chip(trigger);
idesc = irq_desc + irq;
- if (idesc->chip != irq_type) {
+ if (irq_type != NULL && idesc->chip != irq_type) {
if (idesc->chip != &no_irq_type)
printk(KERN_WARNING
"%s: changing vector %d from %s to %s\n",
@@ -976,6 +982,22 @@
}
void __init
+ia64_native_iosapic_pcat_compat_init(void)
+{
+ if (pcat_compat) {
+ /*
+ * Disable the compatibility mode interrupts (8259 style),
+ * needs IN/OUT support enabled.
+ */
+ printk(KERN_INFO
+ "%s: Disabling PC-AT compatible 8259 interrupts\n",
+ __func__);
+ outb(0xff, 0xA1);
+ outb(0xff, 0x21);
+ }
+}
+
+void __init
iosapic_system_init (int system_pcat_compat)
{
int irq;
@@ -989,17 +1011,8 @@
}
pcat_compat = system_pcat_compat;
- if (pcat_compat) {
- /*
- * Disable the compatibility mode interrupts (8259 style),
- * needs IN/OUT support enabled.
- */
- printk(KERN_INFO
- "%s: Disabling PC-AT compatible 8259 interrupts\n",
- __func__);
- outb(0xff, 0xA1);
- outb(0xff, 0x21);
- }
+ if (pcat_compat)
+ iosapic_pcat_compat_init();
}
static inline int