[Qemu-devel] [RESEND PATCH v4 08/10] pc-dimm: Add pc_dimm_unrealize() for memory hot unplug support.

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

From: Hu Tao <hutao@cn.fujitsu.com>

Implement unrealize function for pc-dimm device. It remove subregion from
hotplug region, and delete ram address range from guest ram list.

Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
---
 hw/mem/pc-dimm.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index ee802bb..b105871 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -270,12 +270,22 @@ static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm)
     return host_memory_backend_get_memory(dimm->hostmem, &error_abort);
 }
 
+static void pc_dimm_unrealize(DeviceState *dev, Error **errp)
+{
+    PCDIMMDevice *dimm = PC_DIMM(dev);
+    MemoryRegion *mr = pc_dimm_get_memory_region(dimm);
+
+    memory_region_del_subregion(mr->container, mr);
+    vmstate_unregister_ram(mr, dev);
+}
+
 static void pc_dimm_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
 
     dc->realize = pc_dimm_realize;
+    dc->unrealize = pc_dimm_unrealize;
     dc->props = pc_dimm_properties;
 
     ddc->get_memory_region = pc_dimm_get_memory_region;
-- 
1.8.4.2