| 1 | /* |
| 2 | * Virtio RNG Support |
| 3 | * |
| 4 | * Copyright Red Hat, Inc. 2012 |
| 5 | * Copyright Amit Shah <amit.shah@redhat.com> |
| 6 | * |
| 7 | * This work is licensed under the terms of the GNU GPL, version 2 or |
| 8 | * (at your option) any later version. See the COPYING file in the |
| 9 | * top-level directory. |
| 10 | */ |
| 11 | |
| 12 | #ifndef QEMU_VIRTIO_RNG_H |
| 13 | #define QEMU_VIRTIO_RNG_H |
| 14 | |
| 15 | #include "hw/virtio/virtio.h" |
| 16 | #include "system/rng.h" |
| 17 | #include "standard-headers/linux/virtio_rng.h" |
| 18 | #include "qom/object.h" |
| 19 | |
| 20 | #define TYPE_VIRTIO_RNG "virtio-rng-device" |
| 21 | OBJECT_DECLARE_SIMPLE_TYPE(VirtIORNG, VIRTIO_RNG) |
| 22 | #define VIRTIO_RNG_GET_PARENT_CLASS(obj) \ |
| 23 | OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_RNG) |
| 24 | |
| 25 | struct VirtIORNGConf { |
| 26 | RngBackend *rng; |
| 27 | uint64_t max_bytes; |
| 28 | uint32_t period_ms; |
| 29 | }; |
| 30 | |
| 31 | struct VirtIORNG { |
| 32 | VirtIODevice parent_obj; |
| 33 | |
| 34 | /* Only one vq - guest puts buffer(s) on it when it needs entropy */ |
| 35 | VirtQueue *vq; |
| 36 | |
| 37 | VirtIORNGConf conf; |
| 38 | |
| 39 | RngBackend *rng; |
| 40 | |
| 41 | /* We purposefully don't migrate this state. The quota will reset on the |
| 42 | * destination as a result. Rate limiting is host state, not guest state. |
| 43 | */ |
| 44 | QEMUTimer *rate_limit_timer; |
| 45 | int64_t quota_remaining; |
| 46 | bool activate_timer; |
| 47 | |
| 48 | VMChangeStateEntry *vmstate; |
| 49 | }; |
| 50 | |
| 51 | #endif |