diff options
Diffstat (limited to 'drivers/vfio/vfio.c')
| -rw-r--r-- | drivers/vfio/vfio.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index 8cb7ba03aa16..25f90f3773de 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -1653,10 +1653,7 @@ static const struct file_operations vfio_device_fops = { * increments the container user counter to prevent * the VFIO group from disposal before KVM exits. * - * 3. The external user calls vfio_external_user_iommu_id() - * to know an IOMMU ID. - * - * 4. When the external KVM finishes, it calls + * 3. When the external KVM finishes, it calls * vfio_group_put_external_user() to release the VFIO group. * This call decrements the container user counter. */ @@ -1697,11 +1694,21 @@ bool vfio_external_group_match_file(struct vfio_group *test_group, } EXPORT_SYMBOL_GPL(vfio_external_group_match_file); -int vfio_external_user_iommu_id(struct vfio_group *group) +/** + * vfio_file_iommu_group - Return the struct iommu_group for the vfio group file + * @file: VFIO group file + * + * The returned iommu_group is valid as long as a ref is held on the file. + */ +struct iommu_group *vfio_file_iommu_group(struct file *file) { - return iommu_group_id(group->iommu_group); + struct vfio_group *group = file->private_data; + + if (file->f_op != &vfio_group_fops) + return NULL; + return group->iommu_group; } -EXPORT_SYMBOL_GPL(vfio_external_user_iommu_id); +EXPORT_SYMBOL_GPL(vfio_file_iommu_group); long vfio_external_check_extension(struct vfio_group *group, unsigned long arg) { |