[Qemu-devel] [PATCH v1 07/11] pc-dimm: implement memory device class function set_addr()

[David Hildenbrand <david@redhat.com>]

We can change the address as long as the device has not been plugged
(== memory region mapped) yet.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 hw/mem/pc-dimm.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index a208b17c64..bb8e10903f 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -236,6 +236,28 @@ static uint64_t pc_dimm_md_get_addr(const MemoryDeviceState *md)
     return dimm->addr;
 }
 
+static void pc_dimm_md_set_addr(MemoryDeviceState *md, uint64_t addr,
+                                Error **errp)
+{
+    PCDIMMDevice *dimm = PC_DIMM(md);
+    const PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(md);
+    Error *local_err = NULL;
+    MemoryRegion *mr;
+
+    mr = ddc->get_memory_region(dimm, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    if (memory_region_is_mapped(mr)) {
+        error_setg(errp, "Can't change address, memory region already mapped.");
+        return;
+    }
+
+    dimm->addr = addr;
+}
+
 static uint64_t pc_dimm_md_get_plugged_size(const MemoryDeviceState *md,
                                             Error **errp)
 {
@@ -307,6 +329,7 @@ static void pc_dimm_class_init(ObjectClass *oc, void *data)
     ddc->get_vmstate_memory_region = pc_dimm_get_memory_region;
 
     mdc->get_addr = pc_dimm_md_get_addr;
+    mdc->set_addr = pc_dimm_md_set_addr;
     mdc->get_plugged_size = pc_dimm_md_get_plugged_size;
     mdc->get_memory_region = pc_dimm_md_get_memory_region;
     mdc->fill_device_info = pc_dimm_md_fill_device_info;
-- 
2.17.1