25 static bool is_guest_ready(VirtIORNG *vrng)  in is_guest_ready()  argument
27     VirtIODevice *vdev = VIRTIO_DEVICE(vrng);  in is_guest_ready()
28     if (virtio_queue_ready(vrng->vq)  in is_guest_ready()
32     trace_virtio_rng_guest_not_ready(vrng);  in is_guest_ready()
44 static void virtio_rng_process(VirtIORNG *vrng);
49     VirtIORNG *vrng = opaque;  in chr_read()  local
50     VirtIODevice *vdev = VIRTIO_DEVICE(vrng);  in chr_read()
55     if (!is_guest_ready(vrng)) {  in chr_read()
64         trace_virtio_rng_cpu_is_stopped(vrng, size);  in chr_read()
68     vrng->quota_remaining -= size;  in chr_read()
72         elem = virtqueue_pop(vrng->vq, sizeof(VirtQueueElement));  in chr_read()
76         trace_virtio_rng_popped(vrng);  in chr_read()
81         virtqueue_push(vrng->vq, elem, len);  in chr_read()
82         trace_virtio_rng_pushed(vrng, len);  in chr_read()
85     virtio_notify(vdev, vrng->vq);  in chr_read()
87     if (!virtio_queue_empty(vrng->vq)) {  in chr_read()
91         virtio_rng_process(vrng);  in chr_read()
95 static void virtio_rng_process(VirtIORNG *vrng)  in virtio_rng_process()  argument
100     if (!is_guest_ready(vrng)) {  in virtio_rng_process()
104     if (vrng->activate_timer) {  in virtio_rng_process()
105         timer_mod(vrng->rate_limit_timer,  in virtio_rng_process()
106                   qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vrng->conf.period_ms);  in virtio_rng_process()
107         vrng->activate_timer = false;  in virtio_rng_process()
110     if (vrng->quota_remaining < 0) {  in virtio_rng_process()
113         quota = MIN((uint64_t)vrng->quota_remaining, (uint64_t)UINT32_MAX);  in virtio_rng_process()
115     size = get_request_size(vrng->vq, quota);  in virtio_rng_process()
117     trace_virtio_rng_request(vrng, size, quota);  in virtio_rng_process()
119     size = MIN(vrng->quota_remaining, size);  in virtio_rng_process()
121         rng_backend_request_entropy(vrng->rng, size, chr_read, vrng);  in virtio_rng_process()
127     VirtIORNG *vrng = VIRTIO_RNG(vdev);  in handle_input()  local
128     virtio_rng_process(vrng);  in handle_input()
139     VirtIORNG *vrng = opaque;  in virtio_rng_vm_state_change()  local
141     trace_virtio_rng_vm_state_change(vrng, running, state);  in virtio_rng_vm_state_change()
148     if (running && is_guest_ready(vrng)) {  in virtio_rng_vm_state_change()
149         virtio_rng_process(vrng);  in virtio_rng_vm_state_change()
155     VirtIORNG *vrng = opaque;  in check_rate_limit()  local
157     vrng->quota_remaining = vrng->conf.max_bytes;  in check_rate_limit()
158     virtio_rng_process(vrng);  in check_rate_limit()
159     vrng->activate_timer = true;  in check_rate_limit()
164     VirtIORNG *vrng = VIRTIO_RNG(vdev);  in virtio_rng_set_status()  local
172     virtio_rng_process(vrng);  in virtio_rng_set_status()
178     VirtIORNG *vrng = VIRTIO_RNG(dev);  in virtio_rng_device_realize()  local
180     if (vrng->conf.period_ms <= 0) {  in virtio_rng_device_realize()
187     if (vrng->conf.max_bytes == 0 ||  in virtio_rng_device_realize()
188         vrng->conf.max_bytes > INT64_MAX) {  in virtio_rng_device_realize()
194     if (vrng->conf.rng == NULL) {  in virtio_rng_device_realize()
213     vrng->rng = vrng->conf.rng;  in virtio_rng_device_realize()
214     if (vrng->rng == NULL) {  in virtio_rng_device_realize()
221     vrng->vq = virtio_add_queue(vdev, 8, handle_input);  in virtio_rng_device_realize()
222     vrng->quota_remaining = vrng->conf.max_bytes;  in virtio_rng_device_realize()
223     vrng->rate_limit_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,  in virtio_rng_device_realize()
224                                                check_rate_limit, vrng);  in virtio_rng_device_realize()
225     vrng->activate_timer = true;  in virtio_rng_device_realize()
227     vrng->vmstate = qemu_add_vm_change_state_handler(virtio_rng_vm_state_change,  in virtio_rng_device_realize()
228                                                      vrng);  in virtio_rng_device_realize()
234     VirtIORNG *vrng = VIRTIO_RNG(dev);  in virtio_rng_device_unrealize()  local
236     qemu_del_vm_change_state_handler(vrng->vmstate);  in virtio_rng_device_unrealize()
237     timer_free(vrng->rate_limit_timer);  in virtio_rng_device_unrealize()