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-rw-r--r--include/uapi/linux/vfio.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 9e843a147ead..015516bcfaa3 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -707,6 +707,43 @@ struct vfio_device_ioeventfd {
#define VFIO_DEVICE_IOEVENTFD _IO(VFIO_TYPE, VFIO_BASE + 16)
+/**
+ * VFIO_DEVICE_FEATURE - _IORW(VFIO_TYPE, VFIO_BASE + 17,
+ * struct vfio_device_feature)
+ *
+ * Get, set, or probe feature data of the device. The feature is selected
+ * using the FEATURE_MASK portion of the flags field. Support for a feature
+ * can be probed by setting both the FEATURE_MASK and PROBE bits. A probe
+ * may optionally include the GET and/or SET bits to determine read vs write
+ * access of the feature respectively. Probing a feature will return success
+ * if the feature is supported and all of the optionally indicated GET/SET
+ * methods are supported. The format of the data portion of the structure is
+ * specific to the given feature. The data portion is not required for
+ * probing. GET and SET are mutually exclusive, except for use with PROBE.
+ *
+ * Return 0 on success, -errno on failure.
+ */
+struct vfio_device_feature {
+ __u32 argsz;
+ __u32 flags;
+#define VFIO_DEVICE_FEATURE_MASK (0xffff) /* 16-bit feature index */
+#define VFIO_DEVICE_FEATURE_GET (1 << 16) /* Get feature into data[] */
+#define VFIO_DEVICE_FEATURE_SET (1 << 17) /* Set feature from data[] */
+#define VFIO_DEVICE_FEATURE_PROBE (1 << 18) /* Probe feature support */
+ __u8 data[];
+};
+
+#define VFIO_DEVICE_FEATURE _IO(VFIO_TYPE, VFIO_BASE + 17)
+
+/*
+ * Provide support for setting a PCI VF Token, which is used as a shared
+ * secret between PF and VF drivers. This feature may only be set on a
+ * PCI SR-IOV PF when SR-IOV is enabled on the PF and there are no existing
+ * open VFs. Data provided when setting this feature is a 16-byte array
+ * (__u8 b[16]), representing a UUID.
+ */
+#define VFIO_DEVICE_FEATURE_PCI_VF_TOKEN (0)
+
/* -------- API for Type1 VFIO IOMMU -------- */
/**