vmm: memory_manager: Add ACPI hotplug region to default memory zone

When memory is resized through ACPI, a new region is added to the guest
memory. This region must also be added to the corresponding memory zone
in order to keep everything in sync.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

vmm/src/memory_manager.rs

@@ -1152,6 +1152,12 @@ impl MemoryManager {
 
         let region = self.add_ram_region(start_addr, size)?;
 
+        // Add region to the list of regions associated with the default
+        // memory zone.
+        if let Some(memory_zone) = self.memory_zones.get_mut(DEFAULT_MEMORY_ZONE) {
+            memory_zone.regions.push(Arc::clone(&region));
+        }
+
         // Tell the allocator
         self.allocator
             .lock()