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Diffstat (limited to 'include/hw/virtio/virtio-rng.h')
-rw-r--r-- | include/hw/virtio/virtio-rng.h | 47 |
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 0000000..3711c97 --- /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 |