diff options
| author | Nicolin Chen <nicolinc@nvidia.com> | 2023-07-28 09:33:29 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-07-28 19:31:24 +0300 |
| commit | c157fd88619946cd62af47c45214c479749dad8d (patch) | |
| tree | 20ea10c24eaa8f93163c30d1c668fb8a0a63f97d /include/uapi/linux | |
| parent | c154660b6e26c3f0670a49f43f1fafa5d65f6d39 (diff) | |
| download | linux-c157fd88619946cd62af47c45214c479749dad8d.tar.xz | |
vfio: Support IO page table replacement
Now both the physical path and the emulated path can support an IO page
table replacement. Call iommufd_device_replace/iommufd_access_replace(),
when vdev->iommufd_attached is true.
Also update the VFIO_DEVICE_ATTACH_IOMMUFD_PT kdoc in the uAPI header.
Link: https://lore.kernel.org/r/b5f01956ff161f76aa52c95b0fa1ad6eaca95c4a.1690523699.git.nicolinc@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/vfio.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index fa06e3eb4955..537157ff8670 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -939,6 +939,12 @@ struct vfio_device_bind_iommufd { * Undo by VFIO_DEVICE_DETACH_IOMMUFD_PT or device fd close. This is only * allowed on cdev fds. * + * If a vfio device is currently attached to a valid hw_pagetable, without doing + * a VFIO_DEVICE_DETACH_IOMMUFD_PT, a second VFIO_DEVICE_ATTACH_IOMMUFD_PT ioctl + * passing in another hw_pagetable (hwpt) id is allowed. This action, also known + * as a hw_pagetable replacement, will replace the device's currently attached + * hw_pagetable with a new hw_pagetable corresponding to the given pt_id. + * * Return: 0 on success, -errno on failure. */ struct vfio_device_attach_iommufd_pt { |