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| author |   Max Gurtovoy <mgurtovoy@nvidia.com> | 2021-08-05 22:18:59 -0300 |
|---|---|---|
| committer |   Alex Williamson <alex.williamson@redhat.com> | 2021-08-11 09:50:10 -0600 |
| commit | ae03c3771b8cbbed3802ad1153d896c32015c520 (patch) | |
| tree | 88b17c4754f6823d47dc2516ba43f8ff2ba38506 /Documentation/driver-api | |
| parent | vfio/mbochs: Fix missing error unwind of mbochs_used_mbytes (diff) | |
| download | linux-dev-ae03c3771b8cbbed3802ad1153d896c32015c520.tar.xz linux-dev-ae03c3771b8cbbed3802ad1153d896c32015c520.zip | |
vfio: Introduce a vfio_uninit_group_dev() API call
This pairs with vfio_init_group_dev() and allows undoing any state that is
stored in the vfio_device unrelated to registration. Add appropriately
placed calls to all the drivers.
The following patch will use this to add pre-registration state for the
device set.
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/3-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'Documentation/driver-api')
| -rw-r--r-- | Documentation/driver-api/vfio.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/driver-api/vfio.rst b/Documentation/driver-api/vfio.rst index 606eed8823ce..c663b6f97825 100644 --- a/Documentation/driver-api/vfio.rst +++ b/Documentation/driver-api/vfio.rst @@ -255,11 +255,13 @@ vfio_unregister_group_dev() respectively:: void vfio_init_group_dev(struct vfio_device *device, struct device *dev, const struct vfio_device_ops *ops); + void vfio_uninit_group_dev(struct vfio_device *device); int vfio_register_group_dev(struct vfio_device *device); void vfio_unregister_group_dev(struct vfio_device *device); The driver should embed the vfio_device in its own structure and call -vfio_init_group_dev() to pre-configure it before going to registration. +vfio_init_group_dev() to pre-configure it before going to registration +and call vfio_uninit_group_dev() after completing the un-registration. vfio_register_group_dev() indicates to the core to begin tracking the iommu_group of the specified dev and register the dev as owned by a VFIO bus driver. Once vfio_register_group_dev() returns it is possible for userspace to |