iommu/vt-d: Add basic SVM PASID support

This provides basic PASID support for endpoint devices, tested with a
version of the i915 driver.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/dma_remapping.h b/include/linux/dma_remapping.h
index 7ac17f57250e..0e114bfabeed 100644
--- a/include/linux/dma_remapping.h
+++ b/include/linux/dma_remapping.h
@@ -20,6 +20,13 @@
 #define CONTEXT_TT_MULTI_LEVEL  0
 #define CONTEXT_TT_DEV_IOTLB    1
 #define CONTEXT_TT_PASS_THROUGH 2
+/* Extended context entry types */
+#define CONTEXT_TT_PT_PASID     4
+#define CONTEXT_TT_PT_PASID_DEV_IOTLB 5
+#define CONTEXT_TT_MASK (7ULL << 2)
+
+#define CONTEXT_PRS             (1ULL << 9)
+#define CONTEXT_PASIDE          (1ULL << 11)
 
 struct intel_iommu;
 struct dmar_domain;