static bool
virtqueue_get_head(VuDev *dev, VuVirtq *vq,
unsigned int idx, unsigned int *head)
{
/* Grab the next descriptor number they're advertising, and increment
* the index we've seen. */
*head = vring_avail_ring(vq, idx % vq->vring.num);
/* If their number is silly, that's a fatal mistake. */
if (*head >= vq->vring.num) {
vu_panic(dev, "Guest says index %u is available", head);
return false;
}
return true;
}
static unsigned int virtqueue_get_head(VirtQueue *vq, unsigned int idx)
{
unsigned int head;
/* Grab the next descriptor number they're advertising, and increment
* the index we've seen. */
head = vring_avail_ring(vq, idx % vq->vring.num);
/* If their number is silly, that's a fatal mistake. */
if (head >= vq->vring.num) {
fprintf(stderr, "Guest says index %u is available", head);
exit(1);
}
return head;
}
static inline uint16_t vring_used_event(VirtQueue *vq)
{
return vring_avail_ring(vq, vq->vring.num);
}
static inline uint16_t
vring_get_used_event(VuVirtq *vq)
{
return vring_avail_ring(vq, vq->vring.num);
}
