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vhost: introduce vhost_backend_get_vq_index method

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Minusing the idx with the base(dev->vq_index) for vhost-kernel, and
then adding it back for vhost-user doesn't seem right. Here introduces
a new method vhost_backend_get_vq_index() for getting the right vq
index for following vhost messages calls.

Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Tested-by: Marcel Apfelbaum <marcel@redhat.com>
This commit is contained in:
Yuanhan Liu 2015-09-23 12:19:59 +08:00 • committed by Michael S. Tsirkin
parent e2051e9e00
commit fc57fd9900
4 changed files with 27 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

15
hw/virtio/vhost.c
View file

@ -719,7 +719,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
{
hwaddr s, l, a;
int r;
int vhost_vq_index = idx - dev->vq_index;
int vhost_vq_index = dev->vhost_ops->vhost_backend_get_vq_index(dev, idx);
struct vhost_vring_file file = {
.index = vhost_vq_index
};
@ -728,7 +728,6 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
};
struct VirtQueue *vvq = virtio_get_queue(vdev, idx);
assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
vq->num = state.num = virtio_queue_get_num(vdev, idx);
r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_NUM, &state);
@ -822,12 +821,12 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev,
struct vhost_virtqueue *vq,
unsigned idx)
{
int vhost_vq_index = idx - dev->vq_index;
int vhost_vq_index = dev->vhost_ops->vhost_backend_get_vq_index(dev, idx);
struct vhost_vring_state state = {
.index = vhost_vq_index,
};
int r;
assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
r = dev->vhost_ops->vhost_call(dev, VHOST_GET_VRING_BASE, &state);
if (r < 0) {
fprintf(stderr, "vhost VQ %d ring restore failed: %d\n", idx, r);
@ -1066,17 +1065,15 @@ void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
{
struct VirtQueue *vvq = virtio_get_queue(vdev, n);
int r, index = n - hdev->vq_index;
struct vhost_vring_file file;
assert(n >= hdev->vq_index && n < hdev->vq_index + hdev->nvqs);
struct vhost_vring_file file = {
.index = index
};
if (mask) {
file.fd = event_notifier_get_fd(&hdev->vqs[index].masked_notifier);
} else {
file.fd = event_notifier_get_fd(virtio_queue_get_guest_notifier(vvq));
}
file.index = hdev->vhost_ops->vhost_backend_get_vq_index(hdev, n);
r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_VRING_CALL, &file);
assert(r >= 0);
}