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[IA64] pvops: add hooks, pv_iosapic_ops, to paravirtualize iosapic.

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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>
This commit is contained in:
Isaku Yamahata
2008-05-19 22:13:42 +09:00
committed by Tony Luck
parent e51835d58a
commit 33b39e8420
4 changed files with 110 additions and 18 deletions
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45
arch/ia64/kernel/iosapic.c
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@@ -587,6 +587,15 @@ static inline int irq_is_shared (int irq)
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 @@ register_intr (unsigned int gsi, int irq, unsigned char delivery,
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",
@@ -975,6 +981,22 @@ iosapic_override_isa_irq (unsigned int isa_irq, unsigned int gsi,
set_rte(gsi, irq, dest, 1);
}
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)
{
@@ -989,17 +1011,8 @@ iosapic_system_init (int system_pcat_compat)
}
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