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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2010-12-01 14:51:44 +0000
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>2010-12-02 14:40:50 +0000
commit9a069c33c53c2e72ec1b76106be73df044af0195 (patch)
tree765e44e4425da42f988e1fcf07e9b85cce708e40 /drivers
parent6411fe69b8c4fd7811339c88c1843d562099fa2b (diff)
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xen: fix save/restore for PV on HVM guests with pirq remapping
Re-map and re-bind all the pirqs at resume time. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/xen/events.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index f78945ce8ae..f34288a5400 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -1293,6 +1293,42 @@ static int retrigger_dynirq(unsigned int irq)
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)
{
struct evtchn_bind_virq bind_virq;
@@ -1436,6 +1472,8 @@ void xen_irq_resume(void)
unmask_evtchn(evtchn);
}
+
+ restore_cpu_pirqs();
}
static struct irq_chip xen_dynamic_chip __read_mostly = {