diff options
| author | Nicolin Chen <nicolinc@nvidia.com> | 2025-07-09 22:58:58 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2025-07-10 12:38:51 -0300 |
| commit | c3436d42f812faffac94f8fb3fb246ab43ffdffe (patch) | |
| tree | c7af5f6e9b941ed9f95c60db328f7af9f037a467 /include/linux/iommu.h | |
| parent | 3fcf56a2393b399f289a473181ce6b19f716b59d (diff) | |
iommu: Pass in a driver-level user data structure to viommu_init op
The new type of vIOMMU for tegra241-cmdqv allows user space VM to use one
of its virtual command queue HW resources exclusively. This requires user
space to mmap the corresponding MMIO page from kernel space for direct HW
control.
To forward the mmap info (offset and length), iommufd should add a driver
specific data structure to the IOMMUFD_CMD_VIOMMU_ALLOC ioctl, for driver
to output the info during the vIOMMU initialization back to user space.
Similar to the existing ioctls and their IOMMU handlers, add a user_data
to viommu_init op to bridge between iommufd and drivers.
Link: https://patch.msgid.link/r/90bd5637dab7f5507c7a64d2c4826e70431e45a4.1752126748.git.nicolinc@nvidia.com
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index fd7319706684..e06a0fbe4bc7 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -700,7 +700,8 @@ struct iommu_ops { size_t (*get_viommu_size)(struct device *dev, enum iommu_viommu_type viommu_type); int (*viommu_init)(struct iommufd_viommu *viommu, - struct iommu_domain *parent_domain); + struct iommu_domain *parent_domain, + const struct iommu_user_data *user_data); const struct iommu_domain_ops *default_domain_ops; unsigned long pgsize_bitmap; |