diff -urp a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
--- a/drivers/iommu/intel-iommu.c	2014-12-29 10:52:02.000000000 +0800
+++ b/drivers/iommu/intel-iommu.c	2014-12-29 09:36:23.000000000 +0800
@@ -5188,6 +5188,8 @@ static void __iommu_load_old_root_entry(
 		|| (!iommu->root_entry_old_phys))
 		return;
 	memcpy(iommu->root_entry, iommu->root_entry_old_virt, PAGE_SIZE);
+
+	__iommu_flush_cache(iommu, iommu->root_entry, PAGE_SIZE);
 }
 
 /*
@@ -5220,6 +5222,8 @@ static void __iommu_update_old_root_entr
 	to = iommu->root_entry_old_virt;
 	from = iommu->root_entry;
 	memcpy(to + start, from + start, size);
+
+	__iommu_flush_cache(iommu, to + start, size);
 }
 
 /*
diff -urp a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
--- a/drivers/iommu/intel_irq_remapping.c	2014-12-29 10:52:02.000000000 +0800
+++ b/drivers/iommu/intel_irq_remapping.c	2014-12-29 09:51:52.000000000 +0800
@@ -1350,6 +1350,9 @@ static int __iommu_load_old_irte(struct
 		iommu->ir_table->base_old_virt,
 		INTR_REMAP_TABLE_ENTRIES*sizeof(struct irte));
 
+	__iommu_flush_cache(iommu, iommu->ir_table->base,
+		INTR_REMAP_TABLE_ENTRIES*sizeof(struct irte));
+
 	return 0;
 }
 
@@ -1382,6 +1385,8 @@ static int __iommu_update_old_irte(struc
 	from = iommu->ir_table->base;
 	memcpy(to + start, from + start, size);
 
+	__iommu_flush_cache(iommu, to + start, size);
+
 	return 0;
 }
 #endif /* CONFIG_CRASH_DUMP */