[PATCH 5/8] hw/acpi/piix4: Support forced PCI unplug

Support forced PCI unplug for PIIX4. This enables forced removal for ACPI
PCI hotplug on i440fx machines while rejecting non-PCI devices.

Signed-off-by: Dongli Zhang <[email protected]>
---
 hw/acpi/piix4.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 9b7f50c7af..7cfdcb7935 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -383,6 +383,20 @@ static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev,
     }
 }
 
+static void piix4_device_force_unplug_cb(HotplugHandler *hotplug_dev,
+                                         DeviceState *dev, Error **errp)
+{
+    PIIX4PMState *s = PIIX4_PM(hotplug_dev);
+
+    if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
+        acpi_pcihp_device_force_unplug_cb(hotplug_dev, &s->acpi_pci_hotplug,
+                                          dev, errp);
+    } else {
+        error_setg(errp, "acpi: forced device unplug for not supported device"
+                   " type: %s", object_get_typename(OBJECT(dev)));
+    }
+}
+
 static bool piix4_is_hotpluggable_bus(HotplugHandler *hotplug_dev,
                                       BusState *bus)
 {
@@ -604,6 +618,7 @@ static void piix4_pm_class_init(ObjectClass *klass, const void *data)
     hc->plug = piix4_device_plug_cb;
     hc->unplug_request = piix4_device_unplug_request_cb;
     hc->unplug = piix4_device_unplug_cb;
+    hc->force_unplug = piix4_device_force_unplug_cb;
     hc->is_hotpluggable_bus = piix4_is_hotpluggable_bus;
     adevc->ospm_status = piix4_ospm_status;
     adevc->send_event = piix4_send_gpe;
-- 
2.43.5