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