diff --git a/Documentation/ABI/testing/sysfs-kernel-iommu_groups b/Documentation/ABI/testing/sysfs-kernel-iommu_groups
index 35c64e00b35c..017f5bc3920c 100644
--- a/Documentation/ABI/testing/sysfs-kernel-iommu_groups
+++ b/Documentation/ABI/testing/sysfs-kernel-iommu_groups
@@ -24,3 +24,12 @@ Description:    /sys/kernel/iommu_groups/reserved_regions list IOVA
 		region is described on a single line: the 1st field is
 		the base IOVA, the second is the end IOVA and the third
 		field describes the type of the region.
+
+What:		/sys/kernel/iommu_groups/reserved_regions
+Date: 		June 2019
+KernelVersion:  v5.3
+Contact: 	Eric Auger <eric.auger@redhat.com>
+Description:    In case an RMRR is used only by graphics or USB devices
+		it is now exposed as "direct-relaxable" instead of "direct".
+		In device assignment use case, for instance, those RMRR
+		are considered to be relaxable and safe.
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index ba0661744a3d..46a06ff46e47 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -73,10 +73,11 @@ struct iommu_group_attribute {
 };
 
 static const char * const iommu_group_resv_type_string[] = {
-	[IOMMU_RESV_DIRECT]	= "direct",
-	[IOMMU_RESV_RESERVED]	= "reserved",
-	[IOMMU_RESV_MSI]	= "msi",
-	[IOMMU_RESV_SW_MSI]	= "msi",
+	[IOMMU_RESV_DIRECT]			= "direct",
+	[IOMMU_RESV_DIRECT_RELAXABLE]		= "direct-relaxable",
+	[IOMMU_RESV_RESERVED]			= "reserved",
+	[IOMMU_RESV_MSI]			= "msi",
+	[IOMMU_RESV_SW_MSI]			= "msi",
 };
 
 #define IOMMU_GROUP_ATTR(_name, _mode, _show, _store)		\
@@ -575,7 +576,8 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group,
 		start = ALIGN(entry->start, pg_size);
 		end   = ALIGN(entry->start + entry->length, pg_size);
 
-		if (entry->type != IOMMU_RESV_DIRECT)
+		if (entry->type != IOMMU_RESV_DIRECT &&
+		    entry->type != IOMMU_RESV_DIRECT_RELAXABLE)
 			continue;
 
 		for (addr = start; addr < end; addr += pg_size) {
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 91af22a344e2..ab7a1c85af75 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -135,6 +135,12 @@ enum iommu_attr {
 enum iommu_resv_type {
 	/* Memory regions which must be mapped 1:1 at all times */
 	IOMMU_RESV_DIRECT,
+	/*
+	 * Memory regions which are advertised to be 1:1 but are
+	 * commonly considered relaxable in some conditions,
+	 * for instance in device assignment use case (USB, Graphics)
+	 */
+	IOMMU_RESV_DIRECT_RELAXABLE,
 	/* Arbitrary "never map this or give it to a device" address ranges */
 	IOMMU_RESV_RESERVED,
 	/* Hardware MSI region (untranslated) */