vhost-vdpa: uAPI to suspend the device

[linux-2.6-microblaze.git] / include / uapi / linux / vhost.h

diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index cab645d..f9f115a 100644 (file)
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -171,4 +171,13 @@
 #define VHOST_VDPA_SET_GROUP_ASID      _IOW(VHOST_VIRTIO, 0x7C, \
                                             struct vhost_vring_state)
 
+/* Suspend a device so it does not process virtqueue requests anymore
+ *
+ * After the return of ioctl the device must preserve all the necessary state
+ * (the virtqueue vring base plus the possible device specific states) that is
+ * required for restoring in the future. The device must not change its
+ * configuration after that point.
+ */
+#define VHOST_VDPA_SUSPEND             _IO(VHOST_VIRTIO, 0x7D)
+
 #endif