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domain_alloc_user op already accepts user flags for domain allocation, add a parent domain pointer and a driver specific user data support as well. The user data would be tagged with a type for iommu drivers to add their own driver specific user data per hw_pagetable. Add a struct iommu_user_data as a bundle of data_ptr/data_len/type from an iommufd core uAPI structure. Make the user data opaque to the core, since a userspace driver must match the kernel driver. In the future, if drivers share some common parameter, there would be a generic parameter as well. Link: https://lore.kernel.org/r/20231026043938.63898-7-yi.l.liu@intel.com Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Co-developed-by: Nicolin Chen <nicolinc@nvidia.com> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com> Signed-off-by: Yi Liu <yi.l.liu@intel.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.