116c915baSAmit Shah /* 216c915baSAmit Shah * Virtio RNG Support 316c915baSAmit Shah * 416c915baSAmit Shah * Copyright Red Hat, Inc. 2012 516c915baSAmit Shah * Copyright Amit Shah <amit.shah@redhat.com> 616c915baSAmit Shah * 716c915baSAmit Shah * This work is licensed under the terms of the GNU GPL, version 2 or 816c915baSAmit Shah * (at your option) any later version. See the COPYING file in the 916c915baSAmit Shah * top-level directory. 1016c915baSAmit Shah */ 1116c915baSAmit Shah 122a6a4076SMarkus Armbruster #ifndef QEMU_VIRTIO_RNG_H 132a6a4076SMarkus Armbruster #define QEMU_VIRTIO_RNG_H 1416c915baSAmit Shah 15ec150c7eSMarkus Armbruster #include "hw/virtio/virtio.h" 16*32cad1ffSPhilippe Mathieu-Daudé #include "system/rng.h" 173e96b2dbSMichael S. Tsirkin #include "standard-headers/linux/virtio_rng.h" 18db1015e9SEduardo Habkost #include "qom/object.h" 1916c915baSAmit Shah 206eac8aecSKONRAD Frederic #define TYPE_VIRTIO_RNG "virtio-rng-device" 218063396bSEduardo Habkost OBJECT_DECLARE_SIMPLE_TYPE(VirtIORNG, VIRTIO_RNG) 22a8d57dfbSAndreas Färber #define VIRTIO_RNG_GET_PARENT_CLASS(obj) \ 23a8d57dfbSAndreas Färber OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_RNG) 246eac8aecSKONRAD Frederic 2516c915baSAmit Shah struct VirtIORNGConf { 2616c915baSAmit Shah RngBackend *rng; 27904d6f58SAnthony Liguori uint64_t max_bytes; 28904d6f58SAnthony Liguori uint32_t period_ms; 2916c915baSAmit Shah }; 3016c915baSAmit Shah 31db1015e9SEduardo Habkost struct VirtIORNG { 32611aa333SKONRAD Frederic VirtIODevice parent_obj; 33f1b24e84SKONRAD Frederic 34f1b24e84SKONRAD Frederic /* Only one vq - guest puts buffer(s) on it when it needs entropy */ 35f1b24e84SKONRAD Frederic VirtQueue *vq; 36f1b24e84SKONRAD Frederic 37af1a8ad6SKONRAD Frederic VirtIORNGConf conf; 38f1b24e84SKONRAD Frederic 39f1b24e84SKONRAD Frederic RngBackend *rng; 40f1b24e84SKONRAD Frederic 41f1b24e84SKONRAD Frederic /* We purposefully don't migrate this state. The quota will reset on the 42f1b24e84SKONRAD Frederic * destination as a result. Rate limiting is host state, not guest state. 43f1b24e84SKONRAD Frederic */ 44f1b24e84SKONRAD Frederic QEMUTimer *rate_limit_timer; 45f1b24e84SKONRAD Frederic int64_t quota_remaining; 46621a20e0SPankaj Gupta bool activate_timer; 47a23a6d18SLaurent Vivier 48a23a6d18SLaurent Vivier VMChangeStateEntry *vmstate; 49db1015e9SEduardo Habkost }; 50f1b24e84SKONRAD Frederic 5116c915baSAmit Shah #endif 52