diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index c2d640164f69..a9ca238b039e 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -463,7 +463,9 @@ static void reassign_resources_sorted(struct list_head *realloc_head,
 		} else if (add_size > 0 || !IS_ALIGNED(res->start, align)) {
 			res->flags |= add_res->flags &
 				 (IORESOURCE_STARTALIGN|IORESOURCE_SIZEALIGN);
-			if (pci_reassign_resource(dev, idx, add_size, align))
+			/* Umber Shield: skip reallocation for resources in the 1TB+ aperture */
+			if (res->start < 0x10000000000ULL &&
+					pci_reassign_resource(dev, idx, add_size, align))
 				pci_info(dev, "%s %pR: failed to add optional %llx\n",
 					 res_name, res,
 					 (unsigned long long) add_size);