Esempi in C++ (Cpp) per vring_avail_flags

Esempio n. 1

File: virtio.c Progetto: iggy/qemu

void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)
{
    /* Always notify when queue is empty (when feature acknowledge) */
    if ((vring_avail_flags(vq) & VRING_AVAIL_F_NO_INTERRUPT) &&
        (!(vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) ||
         (vq->inuse || vring_avail_idx(vq) != vq->last_avail_idx)))
        return;

    vdev->isr |= 0x01;
    virtio_notify_vector(vdev, vq->vector);
}

Esempio n. 2

File: Hardware.c Progetto: asadpanda/kvm-guest-drivers-windows

static bool vring_notify(PVOID unused, VirtQueue *vq)
{
    uint16_t old, _new;
    bool v;
    /* Always notify when queue is empty (when feature acknowledge) */
    //if (((vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) &&
	if ((bVirtioF_NotifyOnEmpty &&
         !vq->inuse && vring_avail_idx(vq) == vq->last_avail_idx)) {
        return TRUE;
    }

    //if (!(vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX))) {
	if (!bUsePublishedIndices) {
        return !(vring_avail_flags(vq) & VRING_AVAIL_F_NO_INTERRUPT);
    }

    v = vq->signalled_used_valid;
    vq->signalled_used_valid = TRUE;
    old = vq->signalled_used;
    _new = vq->signalled_used = vring_used_idx(vq);
    return !v || vring_need_event(vring_used_event(vq), _new, old);
}