@@ -525,6 +525,10 @@ static void piix4_pm_realize(PCIDevice *dev, Error **errp)
s->machine_ready.notify = piix4_pm_machine_ready;
qemu_add_machine_init_done_notifier(&s->machine_ready);
+ if (xen_enabled()) {
+ s->use_acpi_hotplug_bridge = false;
+ }
+
piix4_acpi_system_hot_add_init(pci_address_space_io(dev),
pci_get_bus(dev), s);
qbus_set_hotplug_handler(BUS(pci_get_bus(dev)), OBJECT(s));
@@ -551,9 +555,6 @@ I2CBus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
s->irq = sci_irq;
s->smi_irq = smi_irq;
s->smm_enabled = smm_enabled;
- if (xen_enabled()) {
- s->use_acpi_hotplug_bridge = false;
- }
pci_realize_and_unref(pci_dev, bus, &error_fatal);