611aa333b4
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
/*
|
|
* 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 "sysemu/rng.h"
|
|
#include "sysemu/rng-random.h"
|
|
|
|
#define TYPE_VIRTIO_RNG "virtio-rng-device"
|
|
#define VIRTIO_RNG(obj) \
|
|
OBJECT_CHECK(VirtIORNG, (obj), TYPE_VIRTIO_RNG)
|
|
|
|
/* 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 parent_obj;
|
|
|
|
/* 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;
|
|
|
|
/* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If
|
|
you have an entropy source capable of generating more entropy than this
|
|
and you can pass it through via virtio-rng, then hats off to you. Until
|
|
then, this is unlimited for all practical purposes.
|
|
*/
|
|
#define DEFINE_VIRTIO_RNG_PROPERTIES(_state, _conf_field) \
|
|
DEFINE_PROP_UINT64("max-bytes", _state, _conf_field.max_bytes, \
|
|
INT64_MAX), \
|
|
DEFINE_PROP_UINT32("period", _state, _conf_field.period_ms, 1 << 16)
|
|
|
|
#endif
|