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xen/events: change to using fasteoi 

Change event delivery to:
 - mask+clear event in the upcall function
 - use handle_fasteoi_irq as the handler
 - unmask in the eoi function (and handle migration)

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge 2010-08-27 17:30:24 -07:00
parent 1e17fc7eff
commit 3588fe2e3f
1 changed files with 7 additions and 4 deletions
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11
drivers/xen/events.c
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@ -378,7 +378,7 @@ int bind_evtchn_to_irq(unsigned int evtchn)
irq = find_unbound_irq();
set_irq_chip_and_handler_name(irq, &xen_dynamic_chip,
handle_edge_irq, "event");
handle_fasteoi_irq, "event");
evtchn_to_irq[evtchn] = irq;
irq_info[irq] = mk_evtchn_info(evtchn);
@ -664,6 +664,9 @@ static void __xen_evtchn_do_upcall(void)
int irq = evtchn_to_irq[port];
struct irq_desc *desc;
mask_evtchn(port);
clear_evtchn(port);
if (irq != -1) {
desc = irq_to_desc(irq);
if (desc)
@ -801,10 +804,10 @@ static void ack_dynirq(unsigned int irq)
{
int evtchn = evtchn_from_irq(irq);
move_native_irq(irq);
move_masked_irq(irq);
if (VALID_EVTCHN(evtchn))
clear_evtchn(evtchn);
unmask_evtchn(evtchn);
}
static int retrigger_dynirq(unsigned int irq)
@ -960,7 +963,7 @@ static struct irq_chip xen_dynamic_chip __read_mostly = {
.mask = disable_dynirq,
.unmask = enable_dynirq,
.ack = ack_dynirq,
.eoi = ack_dynirq,
.set_affinity = set_affinity_irq,
.retrigger = retrigger_dynirq,
};