pc-dimm: merge get_(vmstate_)memory_region()

Importantly, get_vmstate_memory_region() should also fail with a proper
error if called before the device is realized. For a PCDIMM, both functions
are to return the same thing, so share the implementation.

All current users are called after the device has been realized, so we
can expect the calls to succeed.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180619134141.29478-9-david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 73f0eee..4ff39b5 100644 (file)
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -35,7 +35,8 @@ void pc_dimm_plug(DeviceState *dev, MachineState *machine, uint64_t align,
     int slot;
     PCDIMMDevice *dimm = PC_DIMM(dev);
     PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
-    MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm);
+    MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
+                                                              &error_abort);
     Error *local_err = NULL;
     MemoryRegion *mr;
     uint64_t addr;
@@ -90,7 +91,8 @@ void pc_dimm_unplug(DeviceState *dev, MachineState *machine)
 {
     PCDIMMDevice *dimm = PC_DIMM(dev);
     PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
-    MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm);
+    MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
+                                                              &error_abort);
     MemoryRegion *mr = ddc->get_memory_region(dimm, &error_abort);
 
     memory_device_unplug_region(machine, mr);
@@ -229,11 +231,6 @@ static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm, Error **errp)
     return host_memory_backend_get_memory(dimm->hostmem);
 }
 
-static MemoryRegion *pc_dimm_get_vmstate_memory_region(PCDIMMDevice *dimm)
-{
-    return host_memory_backend_get_memory(dimm->hostmem);
-}
-
 static uint64_t pc_dimm_md_get_addr(const MemoryDeviceState *md)
 {
     const PCDIMMDevice *dimm = PC_DIMM(md);
@@ -298,7 +295,7 @@ static void pc_dimm_class_init(ObjectClass *oc, void *data)
     dc->desc = "DIMM memory module";
 
     ddc->get_memory_region = pc_dimm_get_memory_region;
-    ddc->get_vmstate_memory_region = pc_dimm_get_vmstate_memory_region;
+    ddc->get_vmstate_memory_region = pc_dimm_get_memory_region;
 
     mdc->get_addr = pc_dimm_md_get_addr;
     /* for a dimm plugged_size == region_size */

diff --git a/include/hw/mem/pc-dimm.h b/include/hw/mem/pc-dimm.h
index cf71247..5679a80 100644 (file)
--- a/include/hw/mem/pc-dimm.h
+++ b/include/hw/mem/pc-dimm.h
@@ -73,7 +73,8 @@ typedef struct PCDIMMDeviceClass {
     /* public */
     void (*realize)(PCDIMMDevice *dimm, Error **errp);
     MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm, Error **errp);
-    MemoryRegion *(*get_vmstate_memory_region)(PCDIMMDevice *dimm);
+    MemoryRegion *(*get_vmstate_memory_region)(PCDIMMDevice *dimm,
+                                               Error **errp);
 } PCDIMMDeviceClass;
 
 void pc_dimm_plug(DeviceState *dev, MachineState *machine, uint64_t align,