diff --git a/src/commonlib/device_tree.c b/src/commonlib/device_tree.c
index b51f9fc31d..7d5161db23 100644
--- a/src/commonlib/device_tree.c
+++ b/src/commonlib/device_tree.c
@@ -2166,3 +2166,32 @@ bool dt_is_overlay(struct device_tree *tree)
 
 	return false;
 }
+
+struct device_tree_node *dt_add_reserved_memory_region(struct device_tree *tree,
+		      const char *name, const char *compatible, uint64_t addr, uint64_t size,
+		      bool nomap)
+{
+	uint32_t addr_cells, size_cells;
+	const char *path[] = { "reserved-memory", name, NULL };
+
+	/* Find or create the node. Using 1 for the 'create' argument. */
+	struct device_tree_node *node = dt_find_node(tree->root, path,
+						     &addr_cells, &size_cells, 1);
+	if (!node) {
+		printk(BIOS_ERR, "Failed to create reserved-memory node: %s\n", name);
+		return NULL;
+	}
+
+	/* Add the compatible string if provided */
+	if (compatible)
+		dt_add_string_prop(node, "compatible", compatible);
+
+	/* Always add the reg property */
+	dt_add_reg_prop(node, &addr, &size, 1, addr_cells, size_cells);
+
+	/* Add no-map if requested */
+	if (nomap)
+		dt_add_bin_prop(node, "no-map", NULL, 0);
+
+	return node;
+}
diff --git a/src/commonlib/include/commonlib/device_tree.h b/src/commonlib/include/commonlib/device_tree.h
index b6004fe8c4..ec4b4ffd29 100644
--- a/src/commonlib/include/commonlib/device_tree.h
+++ b/src/commonlib/include/commonlib/device_tree.h
@@ -237,4 +237,19 @@ struct device_tree_node *dt_init_reserved_memory_node(struct device_tree *tree);
 /* Check whether a devicetree is an overlay device tree */
 bool dt_is_overlay(struct device_tree *tree);
 
+/*
+ * dt_add_reserved_memory_region - Helper to add a node under `/reserved-memory`
+ * @tree: The device tree structure
+ * @name: Name of the child node (e.g., "ramoops", "pkvm-drng-seed")
+ * @compatible: Compatible string (optional, pass NULL if not needed)
+ * @addr: Physical start address
+ * @size: Size of the region
+ * @nomap: Boolean, if true adds the "no-map" property
+ *
+ * Returns the created node on success, NULL on failure.
+ */
+struct device_tree_node *dt_add_reserved_memory_region(struct device_tree *tree,
+		      const char *name, const char *compatible, uint64_t addr, uint64_t size,
+		      bool nomap);
+
 #endif /* __COMMONLIB_DEVICE_TREE_H__ */