+typedef struct MSIRouteEntry MSIRouteEntry;
+
+struct MSIRouteEntry {
+ PCIDevice *dev; /* Device pointer */
+ int vector; /* MSI/MSIX vector index */
+ int virq; /* Virtual IRQ index */
+ QLIST_ENTRY(MSIRouteEntry) list;
+};
+
+/* List of used GSI routes */
+static QLIST_HEAD(, MSIRouteEntry) msi_route_list = \
+ QLIST_HEAD_INITIALIZER(msi_route_list);
+
+int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
+ int vector, PCIDevice *dev)
+{
+ MSIRouteEntry *entry;
+
+ if (!dev) {
+ /* These are (possibly) IOAPIC routes only used for split
+ * kernel irqchip mode, while what we are housekeeping are
+ * PCI devices only. */
+ return 0;
+ }
+
+ entry = g_new0(MSIRouteEntry, 1);
+ entry->dev = dev;
+ entry->vector = vector;
+ entry->virq = route->gsi;
+ QLIST_INSERT_HEAD(&msi_route_list, entry, list);
+
+ trace_kvm_x86_add_msi_route(route->gsi);
+ return 0;
+}
+
+int kvm_arch_release_virq_post(int virq)
+{
+ MSIRouteEntry *entry, *next;
+ QLIST_FOREACH_SAFE(entry, &msi_route_list, list, next) {
+ if (entry->virq == virq) {
+ trace_kvm_x86_remove_msi_route(virq);
+ QLIST_REMOVE(entry, list);
+ break;
+ }
+ }
+ return 0;
+}
+