diff options
| author | Yi Liu <yi.l.liu@intel.com> | 2023-07-18 06:55:38 -0700 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2023-07-25 10:19:12 -0600 |
| commit | 9048c7341c4df9cae04c154a8b0f556dbe913358 (patch) | |
| tree | c89395b813c0c5b6afc64587064f9a87393d3b41 /drivers/vfio/iommufd.c | |
| parent | 31014aef9e4cc0326b5df0c3149e757a2b490176 (diff) | |
vfio-iommufd: Add detach_ioas support for physical VFIO devices
This prepares for adding DETACH ioctl for physical 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/20230718135551.6592-14-yi.l.liu@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/iommufd.c')
| -rw-r--r-- | drivers/vfio/iommufd.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/vfio/iommufd.c b/drivers/vfio/iommufd.c index 4fc674c01a05..86df5415759a 100644 --- a/drivers/vfio/iommufd.c +++ b/drivers/vfio/iommufd.c @@ -140,6 +140,14 @@ int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id) { int rc; + lockdep_assert_held(&vdev->dev_set->lock); + + if (WARN_ON(!vdev->iommufd_device)) + return -EINVAL; + + if (vdev->iommufd_attached) + return -EBUSY; + rc = iommufd_device_attach(vdev->iommufd_device, pt_id); if (rc) return rc; @@ -148,6 +156,18 @@ int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id) } EXPORT_SYMBOL_GPL(vfio_iommufd_physical_attach_ioas); +void vfio_iommufd_physical_detach_ioas(struct vfio_device *vdev) +{ + lockdep_assert_held(&vdev->dev_set->lock); + + if (WARN_ON(!vdev->iommufd_device) || !vdev->iommufd_attached) + return; + + iommufd_device_detach(vdev->iommufd_device); + vdev->iommufd_attached = false; +} +EXPORT_SYMBOL_GPL(vfio_iommufd_physical_detach_ioas); + /* * The emulated standard ops mean that vfio_device is going to use the * "mdev path" and will call vfio_pin_pages()/vfio_dma_rw(). Drivers using this |