drivers/vfio: Support EEH error injection

The patch adds one more EEH sub-command (VFIO_EEH_PE_INJECT_ERR)
to inject the specified EEH error, which is represented by
(struct vfio_eeh_pe_err), to the indicated PE for testing purpose.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 13 insertions, 1 deletions

diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index b57b750c222f..e4fa1995f613 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -470,12 +470,23 @@ struct vfio_iommu_spapr_tce_info {
  * - unfreeze IO/DMA for frozen PE;
  * - read PE state;
  * - reset PE;
- * - configure PE.
+ * - configure PE;
+ * - inject EEH error.
  */
+struct vfio_eeh_pe_err {
+        __u32 type;
+        __u32 func;
+        __u64 addr;
+        __u64 mask;
+};
+
 struct vfio_eeh_pe_op {
         __u32 argsz;
         __u32 flags;
         __u32 op;
+        union {
+                struct vfio_eeh_pe_err err;
+        };
 };
 
 #define VFIO_EEH_PE_DISABLE             0       /* Disable EEH functionality */
@@ -492,6 +503,7 @@ struct vfio_eeh_pe_op {
 #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_INJECT_ERR          9       /* Inject EEH error          */
 
 #define VFIO_EEH_PE_OP                  _IO(VFIO_TYPE, VFIO_BASE + 21)