1 files changed, 25 insertions, 0 deletions
diff --git a/hw/pci/pcie_port.c b/hw/pci/pcie_port.c
index e95c1e5519..687e4e763a 100644
--- a/hw/pci/pcie_port.c
+++ b/hw/pci/pcie_port.c
@@ -136,6 +136,31 @@ static void pcie_port_class_init(ObjectClass *oc, void *data)
     device_class_set_props(dc, pcie_port_props);
 }
 
+PCIDevice *pcie_find_port_by_pn(PCIBus *bus, uint8_t pn)
+{
+    int devfn;
+
+    for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
+        PCIDevice *d = bus->devices[devfn];
+        PCIEPort *port;
+
+        if (!d || !pci_is_express(d) || !d->exp.exp_cap) {
+            continue;
+        }
+
+        if (!object_dynamic_cast(OBJECT(d), TYPE_PCIE_PORT)) {
+            continue;
+        }
+
+        port = PCIE_PORT(d);
+        if (port->port == pn) {
+            return d;
+        }
+    }
+
+    return NULL;
+}
+
 static const TypeInfo pcie_port_type_info = {
     .name = TYPE_PCIE_PORT,
     .parent = TYPE_PCI_BRIDGE,