1 files changed, 47 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio-rng.h b/include/hw/virtio/virtio-rng.h
new file mode 100644
index 0000000000..3711c97a70
--- /dev/null
+++ b/include/hw/virtio/virtio-rng.h
@@ -0,0 +1,47 @@
+/*
+ * Virtio RNG Support
+ *
+ * Copyright Red Hat, Inc. 2012
+ * Copyright Amit Shah <amit.shah@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version.  See the COPYING file in the
+ * top-level directory.
+ */
+
+#ifndef _QEMU_VIRTIO_RNG_H
+#define _QEMU_VIRTIO_RNG_H
+
+#include "qemu/rng.h"
+#include "qemu/rng-random.h"
+
+/* The Virtio ID for the virtio rng device */
+#define VIRTIO_ID_RNG    4
+
+struct VirtIORNGConf {
+    RngBackend *rng;
+    uint64_t max_bytes;
+    uint32_t period_ms;
+    RndRandom *default_backend;
+};
+
+typedef struct VirtIORNG {
+    VirtIODevice vdev;
+
+    DeviceState *qdev;
+
+    /* Only one vq - guest puts buffer(s) on it when it needs entropy */
+    VirtQueue *vq;
+
+    VirtIORNGConf *conf;
+
+    RngBackend *rng;
+
+    /* We purposefully don't migrate this state.  The quota will reset on the
+     * destination as a result.  Rate limiting is host state, not guest state.
+     */
+    QEMUTimer *rate_limit_timer;
+    int64_t quota_remaining;
+} VirtIORNG;
+
+#endif