1 files changed, 11 insertions, 1 deletions
diff --git a/include/hw/pci/pci_bus.h b/include/hw/pci/pci_bus.h
index f6df834170..aea98d5040 100644
--- a/include/hw/pci/pci_bus.h
+++ b/include/hw/pci/pci_bus.h
@@ -15,14 +15,19 @@ typedef struct PCIBusClass {
     BusClass parent_class;
     /*< public >*/
 
-    bool (*is_root)(PCIBus *bus);
     int (*bus_num)(PCIBus *bus);
     uint16_t (*numa_node)(PCIBus *bus);
     bool (*allows_extended_config_space)(PCIBus *bus);
 } PCIBusClass;
 
+enum PCIBusFlags {
+    /* This bus is the root of a PCI domain */
+    PCI_BUS_IS_ROOT                                         = 0x0001,
+};
+
 struct PCIBus {
     BusState qbus;
+    enum PCIBusFlags flags;
     PCIIOMMUFunc iommu_fn;
     void *iommu_opaque;
     uint8_t devfn_min;
@@ -47,4 +52,9 @@ struct PCIBus {
     Notifier machine_done;
 };
 
+static inline bool pci_bus_is_root(PCIBus *bus)
+{
+    return !!(bus->flags & PCI_BUS_IS_ROOT);
+}
+
 #endif /* QEMU_PCI_BUS_H */