Added the following domain attributes for the FSL PAMU driver:
1. Added new iommu stash attribute, which allows setting of the
   LIODN specific stash id parameter through IOMMU API.
2. Added an attribute for enabling/disabling DMA to a particular
   memory window.
3. Added domain attribute to check for PAMUV1 specific constraints.


Signed-off-by: Varun Sethi <redacted>
---
 include/linux/iommu.h |   33 +++++++++++++++++++++++++++++++++
 1 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 529987c..c44e38b 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h

@@ -40,6 +40,23 @@ struct notifier_block;
 typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
 			struct device *, unsigned long, int, void *);
 
+/* cache stash targets */
+#define IOMMU_ATTR_CACHE_L1 1
+#define IOMMU_ATTR_CACHE_L2 2
+#define IOMMU_ATTR_CACHE_L3 3
+
+/* This attribute corresponds to IOMMUs capable of generating
+ * a stash transaction. A stash transaction is typically a
+ * hardware initiated prefetch of data from memory to cache.
+ * This attribute allows configuring stashig specific parameters
+ * in the IOMMU hardware.
+ */
+
+struct iommu_stash_attribute {
+	u32 	cpu;	/* cpu number */
+	u32 	cache;	/* cache to stash to: L1,L2,L3 */
+};