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Index: sys/xen/xen_intr.c
===================================================================
--- sys/xen/xen_intr.c
+++ sys/xen/xen_intr.c
@@ -710,12 +710,13 @@
isrc->xi_port = bind_virq.port;
}
-static void
+static struct xenisrc *
xen_intr_rebind_isrc(struct xenisrc *isrc)
{
int cpu = isrc->xi_cpu;
const char *errfmt;
int error;
+ struct xenisrc *prev;
switch (isrc->xi_type) {
case EVTCHN_TYPE_IPI:
@@ -727,9 +728,10 @@
errfmt = "%1$s: unable to bind xen VIRQ#%4$d to CPU#%2$d: %3$d";
break;
default:
- return;
+ return (NULL);
}
+ prev = xen_intr_port_to_isrc[isrc->xi_port];
xen_intr_port_to_isrc[isrc->xi_port] = isrc;
#ifdef SMP
@@ -741,6 +743,8 @@
#endif
evtchn_unmask_port(isrc->xi_port);
+
+ return (prev);
}
/**
@@ -750,7 +754,6 @@
xen_intr_resume(struct pic *unused, bool suspend_cancelled)
{
shared_info_t *s = HYPERVISOR_shared_info;
- struct xenisrc *isrc;
u_int isrc_idx;
int i;
@@ -770,17 +773,28 @@
for (i = 0; i < nitems(s->evtchn_mask); i++)
atomic_store_rel_long(&s->evtchn_mask[i], ~0);
- /* Remove port -> isrc mappings */
- memset(xen_intr_port_to_isrc, 0, sizeof(xen_intr_port_to_isrc));
+ /* Clear existing port mappings */
+ for (isrc_idx = 0; isrc_idx < NR_EVENT_CHANNELS; ++isrc_idx)
+ if (xen_intr_port_to_isrc[isrc_idx] != NULL)
+ xen_intr_port_to_isrc[isrc_idx]->xi_port = ~0;
- /* Free unused isrcs and rebind VIRQs and IPIs */
- for (isrc_idx = 0; isrc_idx < xen_intr_auto_vector_count; isrc_idx++) {
- u_int vector;
+ /* Remap in-use isrcs, using xen_intr_port_to_isrc as listing */
+ for (isrc_idx = 0; isrc_idx < NR_EVENT_CHANNELS; ++isrc_idx) {
+ struct xenisrc *cur = xen_intr_port_to_isrc[isrc_idx];
- vector = first_evtchn_irq + isrc_idx;
- isrc = (struct xenisrc *)intr_lookup_source(vector);
- if (isrc != NULL)
- xen_intr_rebind_isrc(isrc);
+ /* empty or entry already taken care of */
+ if (cur == NULL || cur->xi_port == isrc_idx)
+ continue;
+
+ xen_intr_port_to_isrc[isrc_idx] = NULL;
+
+ do {
+ KASSERT(cur->xi_port >= NR_EVENT_CHANNELS,
+ ("%s(): Multiple channels on single intr?",
+ __func__));
+
+ cur = xen_intr_rebind_isrc(cur);
+ } while (cur != NULL);
}
}

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