Add qemu 2.4.0

[kvmfornfv.git] / qemu / include / hw / virtio / vhost-backend.h

diff --git a/qemu/include/hw/virtio/vhost-backend.h b/qemu/include/hw/virtio/vhost-backend.h
new file mode 100644 (file)
index 0000000..e472f29
--- /dev/null
+++ b/qemu/include/hw/virtio/vhost-backend.h
@@ -0,0 +1,40 @@
+/*
+ * vhost-backend
+ *
+ * Copyright (c) 2013 Virtual Open Systems Sarl.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef VHOST_BACKEND_H_
+#define VHOST_BACKEND_H_
+
+typedef enum VhostBackendType {
+    VHOST_BACKEND_TYPE_NONE = 0,
+    VHOST_BACKEND_TYPE_KERNEL = 1,
+    VHOST_BACKEND_TYPE_USER = 2,
+    VHOST_BACKEND_TYPE_MAX = 3,
+} VhostBackendType;
+
+struct vhost_dev;
+
+typedef int (*vhost_call)(struct vhost_dev *dev, unsigned long int request,
+             void *arg);
+typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque);
+typedef int (*vhost_backend_cleanup)(struct vhost_dev *dev);
+
+typedef struct VhostOps {
+    VhostBackendType backend_type;
+    vhost_call vhost_call;
+    vhost_backend_init vhost_backend_init;
+    vhost_backend_cleanup vhost_backend_cleanup;
+} VhostOps;
+
+extern const VhostOps user_ops;
+
+int vhost_set_backend_type(struct vhost_dev *dev,
+                           VhostBackendType backend_type);
+
+#endif /* VHOST_BACKEND_H_ */