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xen: fix save/restore for PV on HVM guests with pirq remapping

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Re-map and re-bind all the pirqs at resume time.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Stefano Stabellini
2010-12-01 14:51:44 +00:00
parent 6411fe69b8
commit 9a069c33c5
1 changed files with 38 additions and 0 deletions
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38
drivers/xen/events.c
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@@ -1293,6 +1293,42 @@ static int retrigger_dynirq(unsigned int irq)
return ret; return ret;
} }
static void restore_cpu_pirqs(void)
{
int pirq, rc, irq, gsi;
struct physdev_map_pirq map_irq;
for (pirq = 0; pirq < nr_irqs; pirq++) {
irq = pirq_to_irq[pirq];
if (irq == -1)
continue;
/* save/restore of PT devices doesn't work, so at this point the
* only devices present are GSI based emulated devices */
gsi = gsi_from_irq(irq);
if (!gsi)
continue;
map_irq.domid = DOMID_SELF;
map_irq.type = MAP_PIRQ_TYPE_GSI;
map_irq.index = gsi;
map_irq.pirq = pirq;
rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
if (rc) {
printk(KERN_WARNING "xen map irq failed gsi=%d irq=%d pirq=%d rc=%d\n",
gsi, irq, pirq, rc);
irq_info[irq] = mk_unbound_info();
pirq_to_irq[pirq] = -1;
continue;
}
printk(KERN_DEBUG "xen: --> irq=%d, pirq=%d\n", irq, map_irq.pirq);
startup_pirq(irq);
}
}
static void restore_cpu_virqs(unsigned int cpu) static void restore_cpu_virqs(unsigned int cpu)
{ {
struct evtchn_bind_virq bind_virq; struct evtchn_bind_virq bind_virq;
@@ -1436,6 +1472,8 @@ void xen_irq_resume(void)
unmask_evtchn(evtchn); unmask_evtchn(evtchn);
} }
restore_cpu_pirqs();
} }
static struct irq_chip xen_dynamic_chip __read_mostly = { static struct irq_chip xen_dynamic_chip __read_mostly = {