hw/xen: use qemu_create_nic_bus_devices() to instantiate Xen NICs

When instantiating XenBus itself, for each NIC which is configured with
either the model unspecified, or set to to "xen" or "xen-net-device",
create a corresponding xen-net-device for it.

Now we can revert the previous more hackish version which relied on the
platform code explicitly registering the NICs on its own XenBus, having
returned the BusState* from xen_bus_init() itself.

This also fixes the setup for Xen PV guests, which was previously broken
in various ways and never actually managed to peer with the netdev.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>

1 files changed, 2 insertions, 11 deletions

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index ebb0b1c667..196827531a 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1269,7 +1269,7 @@ void pc_basic_device_init(struct PCMachineState *pcms,
         if (pcms->bus) {
             pci_create_simple(pcms->bus, -1, "xen-platform");
         }
-        pcms->xenbus = xen_bus_init();
+        xen_bus_init();
         xen_be_init();
     }
 #endif
@@ -1297,8 +1297,7 @@ void pc_basic_device_init(struct PCMachineState *pcms,
                     pcms->vmport != ON_OFF_AUTO_ON);
 }
 
-void pc_nic_init(PCMachineClass *pcmc, ISABus *isa_bus, PCIBus *pci_bus,
-                 BusState *xen_bus)
+void pc_nic_init(PCMachineClass *pcmc, ISABus *isa_bus, PCIBus *pci_bus)
 {
     MachineClass *mc = MACHINE_CLASS(pcmc);
     bool default_is_ne2k = g_str_equal(mc->default_nic, TYPE_ISA_NE2000);
@@ -1306,14 +1305,6 @@ void pc_nic_init(PCMachineClass *pcmc, ISABus *isa_bus, PCIBus *pci_bus,
 
     rom_set_order_override(FW_CFG_ORDER_OVERRIDE_NIC);
 
-    if (xen_bus) {
-        while ((nd = qemu_find_nic_info("xen-net-device", true, NULL))) {
-            DeviceState *dev = qdev_new("xen-net-device");
-            qdev_set_nic_properties(dev, nd);
-            qdev_realize_and_unref(dev, xen_bus, &error_fatal);
-        }
-    }
-
     while ((nd = qemu_find_nic_info(TYPE_ISA_NE2000, default_is_ne2k, NULL))) {
         pc_init_ne2k_isa(isa_bus, nd, &error_fatal);
     }