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virtio: last minute fixes

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A couple of last minute fixes
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio fixes from Michael Tsirkin:
 "A couple of last minute fixes"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vhost-vdpa: fix backend feature ioctls
  vhost: Fix documentation
This commit is contained in:
Linus Torvalds 2020-09-29 10:33:06 -07:00
commit 1ccfa66d94
2 changed files with 18 additions and 16 deletions
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4
drivers/vhost/iotlb.c
View File

@ -149,7 +149,7 @@ EXPORT_SYMBOL_GPL(vhost_iotlb_free);
* vhost_iotlb_itree_first - return the first overlapped range
* @iotlb: the IOTLB
* @start: start of IOVA range
* @end: end of IOVA range
* @last: last byte in IOVA range
*/
struct vhost_iotlb_map *
vhost_iotlb_itree_first(struct vhost_iotlb *iotlb, u64 start, u64 last)
@ -162,7 +162,7 @@ EXPORT_SYMBOL_GPL(vhost_iotlb_itree_first);
* vhost_iotlb_itree_next - return the next overlapped range
* @map: the starting map node
* @start: start of IOVA range
* @end: end of IOVA range
* @last: last byte IOVA range
*/
struct vhost_iotlb_map *
vhost_iotlb_itree_next(struct vhost_iotlb_map *map, u64 start, u64 last)

30
drivers/vhost/vdpa.c
View File

@ -353,8 +353,6 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
struct vdpa_callback cb;
struct vhost_virtqueue *vq;
struct vhost_vring_state s;
u64 __user *featurep = argp;
u64 features;
u32 idx;
long r;
@ -381,18 +379,6 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
vq->last_avail_idx = vq_state.avail_index;
break;
case VHOST_GET_BACKEND_FEATURES:
features = VHOST_VDPA_BACKEND_FEATURES;
if (copy_to_user(featurep, &features, sizeof(features)))
return -EFAULT;
return 0;
case VHOST_SET_BACKEND_FEATURES:
if (copy_from_user(&features, featurep, sizeof(features)))
return -EFAULT;
if (features & ~VHOST_VDPA_BACKEND_FEATURES)
return -EOPNOTSUPP;
vhost_set_backend_features(&v->vdev, features);
return 0;
}
r = vhost_vring_ioctl(&v->vdev, cmd, argp);
@ -440,8 +426,20 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
struct vhost_vdpa *v = filep->private_data;
struct vhost_dev *d = &v->vdev;
void __user *argp = (void __user *)arg;
u64 __user *featurep = argp;
u64 features;
long r;
if (cmd == VHOST_SET_BACKEND_FEATURES) {
r = copy_from_user(&features, featurep, sizeof(features));
if (r)
return r;
if (features & ~VHOST_VDPA_BACKEND_FEATURES)
return -EOPNOTSUPP;
vhost_set_backend_features(&v->vdev, features);
return 0;
}
mutex_lock(&d->mutex);
switch (cmd) {
@ -476,6 +474,10 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
case VHOST_VDPA_SET_CONFIG_CALL:
r = vhost_vdpa_set_config_call(v, argp);
break;
case VHOST_GET_BACKEND_FEATURES:
features = VHOST_VDPA_BACKEND_FEATURES;
r = copy_to_user(featurep, &features, sizeof(features));
break;
default:
r = vhost_dev_ioctl(&v->vdev, cmd, argp);
if (r == -ENOIOCTLCMD)