diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 3367233a5535..50909cbc73f6 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -53,6 +53,7 @@ enum {
 	DDW_EXT_QUERY_OUT_SIZE = 2
 };
 
+static phys_addr_t ddw_memory_hotplug_max(void);
 #ifdef CONFIG_IOMMU_API
 static int tce_exchange_pseries(struct iommu_table *tbl, long index, unsigned long *tce,
 				enum dma_data_direction *direction, bool realmode);
@@ -380,6 +381,7 @@ static DEFINE_SPINLOCK(direct_window_list_lock);
 /* protects initializing window twice for same device */
 static DEFINE_MUTEX(direct_window_init_mutex);
 #define DIRECT64_PROPNAME "linux,direct64-ddr-window-info"
+#define DMA64_PROPNAME "linux,dma64-ddr-window-info"
 
 static int tce_clearrange_multi_pSeriesLP(unsigned long start_pfn,
 					unsigned long num_pfn, const void *arg)
@@ -918,6 +920,7 @@ static int find_existing_ddw_windows(void)
 		return 0;
 
 	find_existing_ddw_windows_named(DIRECT64_PROPNAME);
+	find_existing_ddw_windows_named(DMA64_PROPNAME);
 
 	return 0;
 }
@@ -1207,10 +1210,13 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
 	struct device_node *dn;
 	u32 ddw_avail[DDW_APPLICABLE_SIZE];
 	struct direct_window *window;
+	const char *win_name;
 	struct property *win64 = NULL;
 	struct failed_ddw_pdn *fpdn;
-	bool default_win_removed = false;
+	bool default_win_removed = false, direct_mapping = false;
 	bool pmem_present;
+	struct pci_dn *pci = PCI_DN(pdn);
+	struct iommu_table *tbl = pci->table_group->tables[0];
 
 	dn = of_find_node_by_type(NULL, "ibm,pmemory");
 	pmem_present = dn != NULL;
@@ -1218,8 +1224,12 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
 
 	mutex_lock(&direct_window_init_mutex);
 
-	if (find_existing_ddw(pdn, &dev->dev.archdata.dma_offset, &len))
-		goto out_unlock;
+	if (find_existing_ddw(pdn, &dev->dev.archdata.dma_offset, &len)) {
+		direct_mapping = (len >= max_ram_len);
+
+		mutex_unlock(&direct_window_init_mutex);
+		return direct_mapping;
+	}
 
 	/*
 	 * If we already went through this for a previous function of
@@ -1298,7 +1308,6 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
 		goto out_failed;
 	}
 	/* verify the window * number of ptes will map the partition */
-	/* check largest block * page size > max memory hotplug addr */
 	/*
 	 * The "ibm,pmemory" can appear anywhere in the address space.
 	 * Assuming it is still backed by page structs, try MAX_PHYSMEM_BITS
@@ -1320,6 +1329,17 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
 			1ULL << len,
 			query.largest_available_block,
 			1ULL << page_shift);
+
+		len = order_base_2(query.largest_available_block << page_shift);
+		win_name = DMA64_PROPNAME;
+	} else {
+		direct_mapping = true;
+		win_name = DIRECT64_PROPNAME;
+	}
+
+	/* DDW + IOMMU on single window may fail if there is any allocation */
+	if (default_win_removed && !direct_mapping && iommu_table_in_use(tbl)) {
+		dev_dbg(&dev->dev, "current IOMMU table in use, can't be replaced.\n");
 		goto out_failed;
 	}
 
@@ -1331,8 +1351,7 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
 		  create.liobn, dn);
 
 	win_addr = ((u64)create.addr_hi << 32) | create.addr_lo;
-	win64 = ddw_property_create(DIRECT64_PROPNAME, create.liobn, win_addr,
-				    page_shift, len);
+	win64 = ddw_property_create(win_name, create.liobn, win_addr, page_shift, len);
 	if (!win64) {
 		dev_info(&dev->dev,
 			 "couldn't allocate property, property name, or value\n");
@@ -1350,12 +1369,47 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
 	if (!window)
 		goto out_del_prop;
 
-	ret = walk_system_ram_range(0, memblock_end_of_DRAM() >> PAGE_SHIFT,
-			win64->value, tce_setrange_multi_pSeriesLP_walk);
-	if (ret) {
-		dev_info(&dev->dev, "failed to map direct window for %pOF: %d\n",
-			 dn, ret);
-		goto out_del_list;
+	if (direct_mapping) {
+		/* DDW maps the whole partition, so enable direct DMA mapping */
+		ret = walk_system_ram_range(0, memblock_end_of_DRAM() >> PAGE_SHIFT,
+					    win64->value, tce_setrange_multi_pSeriesLP_walk);
+		if (ret) {
+			dev_info(&dev->dev, "failed to map direct window for %pOF: %d\n",
+				 dn, ret);
+			goto out_del_list;
+		}
+	} else {
+		struct iommu_table *newtbl;
+		int i;
+
+		/* New table for using DDW instead of the default DMA window */
+		newtbl = iommu_pseries_alloc_table(pci->phb->node);
+		if (!newtbl) {
+			dev_dbg(&dev->dev, "couldn't create new IOMMU table\n");
+			goto out_del_list;
+		}
+
+		for (i = 0; i < ARRAY_SIZE(pci->phb->mem_resources); i++) {
+			const unsigned long mask = IORESOURCE_MEM_64 | IORESOURCE_MEM;
+
+			/* Look for MMIO32 */
+			if ((pci->phb->mem_resources[i].flags & mask) == IORESOURCE_MEM)
+				break;
+		}
+
+		_iommu_table_setparms(newtbl, pci->phb->bus->number, create.liobn, win_addr,
+				      1UL << len, page_shift, 0, &iommu_table_lpar_multi_ops);
+		iommu_init_table(newtbl, pci->phb->node, pci->phb->mem_resources[i].start,
+				 pci->phb->mem_resources[i].end);
+
+		if (default_win_removed)
+			iommu_tce_table_put(tbl);
+		else
+			pci->table_group->tables[1] = tbl;
+
+		pci->table_group->tables[0] = newtbl;
+
+		set_iommu_table_base(&dev->dev, newtbl);
 	}
 
 	spin_lock(&direct_window_list_lock);
@@ -1398,10 +1452,10 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
 	 * as RAM, then we failed to create a window to cover persistent
 	 * memory and need to set the DMA limit.
 	 */
-	if (pmem_present && win64 && (len == max_ram_len))
+	if (pmem_present && direct_mapping && len == max_ram_len)
 		dev->dev.bus_dma_limit = dev->dev.archdata.dma_offset + (1ULL << len);
 
-	return win64;
+	return win64 && direct_mapping;
 }
 
 static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev)
@@ -1542,7 +1596,10 @@ static int iommu_reconfig_notifier(struct notifier_block *nb, unsigned long acti
 		 * we have to remove the property when releasing
 		 * the device node.
 		 */
-		remove_ddw(np, false, DIRECT64_PROPNAME);
+
+		if (remove_ddw(np, false, DIRECT64_PROPNAME))
+			remove_ddw(np, false, DMA64_PROPNAME);
+
 		if (pci && pci->table_group)
 			iommu_pseries_free_group(pci->table_group,
 					np->full_name);
