diff options
| author | Yi Liu <yi.l.liu@intel.com> | 2023-07-18 15:55:40 +0200 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2023-07-25 18:19:18 +0200 |
| commit | 8cfa71860233652f8566bcdf55e77aefe0017b4a (patch) | |
| tree | d9206f9a461fff1b045a3bfdd683813ad82dfc3a /drivers/vfio | |
| parent | iommufd/device: Add iommufd_access_detach() API (diff) | |
| download | linux-8cfa71860233652f8566bcdf55e77aefe0017b4a.tar.xz linux-8cfa71860233652f8566bcdf55e77aefe0017b4a.zip | |
vfio-iommufd: Add detach_ioas support for emulated VFIO devices
This prepares for adding DETACH ioctl for emulated VFIO devices.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Tested-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230718135551.6592-16-yi.l.liu@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/iommufd.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/vfio/iommufd.c b/drivers/vfio/iommufd.c index 86df5415759a..4d84904fd927 100644 --- a/drivers/vfio/iommufd.c +++ b/drivers/vfio/iommufd.c @@ -231,3 +231,16 @@ int vfio_iommufd_emulated_attach_ioas(struct vfio_device *vdev, u32 *pt_id) return 0; } EXPORT_SYMBOL_GPL(vfio_iommufd_emulated_attach_ioas); + +void vfio_iommufd_emulated_detach_ioas(struct vfio_device *vdev) +{ + lockdep_assert_held(&vdev->dev_set->lock); + + if (WARN_ON(!vdev->iommufd_access) || + !vdev->iommufd_attached) + return; + + iommufd_access_detach(vdev->iommufd_access); + vdev->iommufd_attached = false; +} +EXPORT_SYMBOL_GPL(vfio_iommufd_emulated_detach_ioas); |