[Qemu-devel] [RESEND PATCH v3 2/8] acpi, ich9: Add memory hot unplug support for ich9.

[Tang Chen <tangchen@cn.fujitsu.com>]

Implement ich9_pm_device_unplug_cb() to support memory hot-remove,
calling acpi_memory_unplug_cb(). And itself will be called in
ich9_device_unplug_cb().

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
---
 hw/acpi/ich9.c         | 12 ++++++++++++
 hw/isa/lpc_ich9.c      |  5 +++--
 include/hw/acpi/ich9.h |  2 ++
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index 7b14bbb..d369151 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -310,6 +310,18 @@ void ich9_pm_device_plug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error **errp)
     }
 }
 
+void ich9_pm_device_unplug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error **errp)
+{
+    if (pm->acpi_memory_hotplug.is_enabled &&
+        object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+        acpi_memory_unplug_cb(&pm->acpi_regs, pm->irq, &pm->acpi_memory_hotplug,
+                              dev, errp);
+    } else {
+        error_setg(errp, "acpi: device unplug request for not supported device"
+                   " type: %s", object_get_typename(OBJECT(dev)));
+    }
+}
+
 void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
 {
     ICH9LPCState *s = ICH9_LPC_DEVICE(adev);
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index 177023b..2c0761a 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -610,8 +610,9 @@ static void ich9_device_plug_cb(HotplugHandler *hotplug_dev,
 static void ich9_device_unplug_cb(HotplugHandler *hotplug_dev,
                                   DeviceState *dev, Error **errp)
 {
-    error_setg(errp, "acpi: device unplug request for not supported device"
-               " type: %s", object_get_typename(OBJECT(dev)));
+    ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev);
+
+    ich9_pm_device_unplug_cb(&lpc->pm, dev, errp);
 }
 
 static bool ich9_rst_cnt_needed(void *opaque)
diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h
index 7e42448..029576f 100644
--- a/include/hw/acpi/ich9.h
+++ b/include/hw/acpi/ich9.h
@@ -60,6 +60,8 @@ extern const VMStateDescription vmstate_ich9_pm;
 void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp);
 
 void ich9_pm_device_plug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error **errp);
+void ich9_pm_device_unplug_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
+                              Error **errp);
 
 void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
 #endif /* HW_ACPI_ICH9_H */
-- 
1.8.4.2