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-rw-r--r--include/uapi/linux/vfio.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 6612974c64b..29715d27548 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -33,6 +33,9 @@
/* Check if EEH is supported */
#define VFIO_EEH 5
+/* Two-stage IOMMU */
+#define VFIO_TYPE1_NESTING_IOMMU 6 /* Implies v2 */
+
/*
* The IOCTL interface is designed for extensibility by embedding the
* structure length (argsz) and flags into structures passed between