1 files changed, 34 insertions, 0 deletions

diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index cb9023d4f063..6612974c64bf 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -30,6 +30,9 @@
  */
 #define VFIO_DMA_CC_IOMMU               4
 
+/* Check if EEH is supported */
+#define VFIO_EEH                        5
+
 /*
  * The IOCTL interface is designed for extensibility by embedding the
  * structure length (argsz) and flags into structures passed between
@@ -455,6 +458,37 @@ struct vfio_iommu_spapr_tce_info {
 
 #define VFIO_IOMMU_SPAPR_TCE_GET_INFO   _IO(VFIO_TYPE, VFIO_BASE + 12)
 
+/*
+ * EEH PE operation struct provides ways to:
+ * - enable/disable EEH functionality;
+ * - unfreeze IO/DMA for frozen PE;
+ * - read PE state;
+ * - reset PE;
+ * - configure PE.
+ */
+struct vfio_eeh_pe_op {
+        __u32 argsz;
+        __u32 flags;
+        __u32 op;
+};
+
+#define VFIO_EEH_PE_DISABLE             0       /* Disable EEH functionality */
+#define VFIO_EEH_PE_ENABLE              1       /* Enable EEH functionality  */
+#define VFIO_EEH_PE_UNFREEZE_IO         2       /* Enable IO for frozen PE   */
+#define VFIO_EEH_PE_UNFREEZE_DMA        3       /* Enable DMA for frozen PE  */
+#define VFIO_EEH_PE_GET_STATE           4       /* PE state retrieval        */
+#define  VFIO_EEH_PE_STATE_NORMAL       0       /* PE in functional state    */
+#define  VFIO_EEH_PE_STATE_RESET        1       /* PE reset in progress      */
+#define  VFIO_EEH_PE_STATE_STOPPED      2       /* Stopped DMA and IO        */
+#define  VFIO_EEH_PE_STATE_STOPPED_DMA  4       /* Stopped DMA only          */
+#define  VFIO_EEH_PE_STATE_UNAVAIL      5       /* State unavailable         */
+#define VFIO_EEH_PE_RESET_DEACTIVATE    5       /* Deassert PE reset         */
+#define VFIO_EEH_PE_RESET_HOT           6       /* Assert hot reset          */
+#define VFIO_EEH_PE_RESET_FUNDAMENTAL   7       /* Assert fundamental reset  */
+#define VFIO_EEH_PE_CONFIGURE           8       /* PE configuration          */
+
+#define VFIO_EEH_PE_OP                  _IO(VFIO_TYPE, VFIO_BASE + 21)
+
 /* ***************************************************************** */
 
 #endif /* _UAPIVFIO_H */