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As the virtio-rng-pci, virtio-rng-s390 and virtio-rng-ccw are switched to the new API, we can use QOM casts. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Andreas Färber <afaerber@suse.de> Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Amit Shah <amit.shah@redhat.com> Message-id: 1366790881-3026-9-git-send-email-fred.konrad@greensocs.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
60 lines
1.7 KiB
C
60 lines
1.7 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 "sysemu/rng.h"
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#include "sysemu/rng-random.h"
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#define TYPE_VIRTIO_RNG "virtio-rng-device"
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#define VIRTIO_RNG(obj) \
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OBJECT_CHECK(VirtIORNG, (obj), TYPE_VIRTIO_RNG)
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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 parent_obj;
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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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/* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If
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you have an entropy source capable of generating more entropy than this
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and you can pass it through via virtio-rng, then hats off to you. Until
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then, this is unlimited for all practical purposes.
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*/
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#define DEFINE_VIRTIO_RNG_PROPERTIES(_state, _conf_field) \
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DEFINE_PROP_UINT64("max-bytes", _state, _conf_field.max_bytes, \
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INT64_MAX), \
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DEFINE_PROP_UINT32("period", _state, _conf_field.period_ms, 1 << 16)
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#endif
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