[Qemu-devel] [RFC 8/8] pc: make PC_MACHINE memory hotplug controller

[Igor Mammedov]

that performs mapping of DIMM into guest's address space

Signed-off-by: Igor Mammedov <address@hidden>
---
 hw/i386/pc.c |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 1824c3d..1cef30d 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1445,6 +1445,17 @@ void ioapic_init_gsi(GSIState *gsi_state, const char 
*parent_name)
     }
 }
 
+static void pc_machine_device_plug_cb(HotplugHandler *hotplug_dev,
+                                      DeviceState *dev, Error **errp)
+{
+   DimmDevice *dimm = DIMM(dev);
+   DimmDeviceClass *ddc = DIMM_GET_CLASS(dimm);
+   PCMachineState *pcms = PC_MACHINE(hotplug_dev);
+   MemoryRegion *mr = ddc->get_memory_region(dimm);
+
+   memory_region_add_subregion(&pcms->hotplug_memory, dimm->start, mr);
+}
+
 void qemu_register_pc_machine(QEMUMachine *m)
 {
     TypeInfo ti = {
@@ -1467,9 +1478,12 @@ static char *pc_dimm_hotplug_path(DeviceState *dev)
 static void pc_machine_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dimm_dc = DEVICE_CLASS(object_class_by_name(TYPE_DIMM));
+    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 
     /* set board specific link path provider for DIMM device */
     dimm_dc->hotplug_path = pc_dimm_hotplug_path;
+
+    hc->plug = pc_machine_device_plug_cb;
 }
 
 static const TypeInfo pc_machine_info = {
@@ -1478,6 +1492,10 @@ static const TypeInfo pc_machine_info = {
     .abstract = true,
     .instance_size = sizeof(PCMachineState),
     .class_init = pc_machine_class_init,
+    .interfaces = (InterfaceInfo[]) {
+         { TYPE_HOTPLUG_HANDLER },
+         { }
+    },
 };
 
 static void pc_machine_register_types(void)
-- 
1.7.1