memory: introduce memory_region_set_address()
Allow changing the address of a memory region while it is
in the memory hierarchy.
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/memory.c b/memory.c
index d0f90ca..a080d21 100644
--- a/memory.c
+++ b/memory.c
@@ -1324,6 +1324,27 @@
memory_region_update_topology(NULL);
}
+void memory_region_set_address(MemoryRegion *mr, target_phys_addr_t addr)
+{
+ MemoryRegion *parent = mr->parent;
+ unsigned priority = mr->priority;
+ bool may_overlap = mr->may_overlap;
+
+ if (addr == mr->addr || !parent) {
+ mr->addr = addr;
+ return;
+ }
+
+ memory_region_transaction_begin();
+ memory_region_del_subregion(parent, mr);
+ if (may_overlap) {
+ memory_region_add_subregion_overlap(parent, addr, mr, priority);
+ } else {
+ memory_region_add_subregion(parent, addr, mr);
+ }
+ memory_region_transaction_commit();
+}
+
void set_system_memory_map(MemoryRegion *mr)
{
address_space_memory.root = mr;
