diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2022-11-29 23:31:50 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2022-12-02 18:52:03 +0300 |
| commit | 2a3dab19a0a6c1823645764188776f271de1b3cf (patch) | |
| tree | 605950ffb3143873914fd431f165051f8d94e07b /drivers/vfio/vfio.h | |
| parent | 0d8227b622f3529661ad6a9702a52932e149a30d (diff) | |
| download | linux-2a3dab19a0a6c1823645764188776f271de1b3cf.tar.xz | |
vfio-iommufd: Allow iommufd to be used in place of a container fd
This makes VFIO_GROUP_SET_CONTAINER accept both a vfio container FD and an
iommufd.
In iommufd mode an IOAS will exist after the SET_CONTAINER, but it will
not be attached to any groups.
For VFIO this means that the VFIO_GROUP_GET_STATUS and
VFIO_GROUP_FLAGS_VIABLE works subtly differently. With the container FD
the iommu_group_claim_dma_owner() is done during SET_CONTAINER but for
IOMMUFD this is done during VFIO_GROUP_GET_DEVICE_FD. Meaning that
VFIO_GROUP_FLAGS_VIABLE could be set but GET_DEVICE_FD will fail due to
viability.
As GET_DEVICE_FD can fail for many reasons already this is not expected to
be a meaningful difference.
Reorganize the tests for if the group has an assigned container or iommu
into a vfio_group_has_iommu() function and consolidate all the duplicated
WARN_ON's etc related to this.
Call container functions only if a container is actually present on the
group.
Link: https://lore.kernel.org/r/5-v4-42cd2eb0e3eb+335a-vfio_iommufd_jgg@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Lixiao Yang <lixiao.yang@intel.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Yu He <yu.he@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/vfio/vfio.h')
| -rw-r--r-- | drivers/vfio/vfio.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index 731561258704..a9dd0615266c 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -10,6 +10,7 @@ #include <linux/cdev.h> #include <linux/module.h> +struct iommufd_ctx; struct iommu_group; struct vfio_device; struct vfio_container; @@ -60,6 +61,7 @@ struct vfio_group { struct kvm *kvm; struct file *opened_file; struct blocking_notifier_head notifier; + struct iommufd_ctx *iommufd; }; /* events for the backend driver notify callback */ |