[PATCH 6/8] hw/acpi/ich9: Support forced PCI unplug

Support forced PCI unplug for ICH9. This enables forced removal for ACPI
PCI hotplug on q35 machines while rejecting non-PCI devices.

Signed-off-by: Dongli Zhang <[email protected]>
---
 hw/acpi/ich9.c         | 15 +++++++++++++++
 hw/isa/lpc_ich9.c      |  1 +
 include/hw/acpi/ich9.h |  2 ++
 3 files changed, 18 insertions(+)

diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index 5e8f8a7eaf..4bcaf3858b 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -528,6 +528,21 @@ void ich9_pm_device_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
     }
 }
 
+void ich9_pm_device_force_unplug_cb(HotplugHandler *hotplug_dev,
+                                    DeviceState *dev, Error **errp)
+{
+    ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev);
+
+    if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
+        acpi_pcihp_device_force_unplug_cb(hotplug_dev,
+                                          &lpc->pm.acpi_pci_hotplug,
+                                          dev, errp);
+    } else {
+        error_setg(errp, "acpi: forced device unplug for not supported device"
+                   " type: %s", object_get_typename(OBJECT(dev)));
+    }
+}
+
 bool ich9_pm_is_hotpluggable_bus(HotplugHandler *hotplug_dev, BusState *bus)
 {
     ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev);
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index edf9783ec8..6d734ffc47 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -908,6 +908,7 @@ static void ich9_lpc_class_init(ObjectClass *klass, const void *data)
     hc->plug = ich9_pm_device_plug_cb;
     hc->unplug_request = ich9_pm_device_unplug_request_cb;
     hc->unplug = ich9_pm_device_unplug_cb;
+    hc->force_unplug = ich9_pm_device_force_unplug_cb;
     hc->is_hotpluggable_bus = ich9_pm_is_hotpluggable_bus;
     adevc->ospm_status = ich9_pm_ospm_status;
     adevc->send_event = ich9_send_gpe;
diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h
index 30990fcef5..cc9f50a60f 100644
--- a/include/hw/acpi/ich9.h
+++ b/include/hw/acpi/ich9.h
@@ -93,6 +93,8 @@ void ich9_pm_device_unplug_request_cb(HotplugHandler *hotplug_dev,
                                       DeviceState *dev, Error **errp);
 void ich9_pm_device_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
                               Error **errp);
+void ich9_pm_device_force_unplug_cb(HotplugHandler *hotplug_dev,
+                                    DeviceState *dev, Error **errp);
 bool ich9_pm_is_hotpluggable_bus(HotplugHandler *hotplug_dev, BusState *bus);
 
 void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
-- 
2.43.5