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Jason Gunthorpe
07107e7444
virtio has the complication that it sometimes wants to return a paging domain for IDENTITY which makes this conversion a little different than other drivers. Add a viommu_domain_alloc_paging() that combines viommu_domain_alloc() and viommu_domain_finalise() to always return a fully initialized and finalized paging domain. Use viommu_domain_alloc_identity() to implement the special non-bypass IDENTITY flow by calling viommu_domain_alloc_paging() then viommu_domain_map_identity(). Remove support for deferred finalize and the vdomain->mutex. Remove core support for domain_alloc() IDENTITY as virtio was the last driver using it. Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Link: https://lore.kernel.org/r/3-v4-ff5fb6b03bd1+288-iommu_virtio_domains_jgg@nvidia.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
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 reStructuredText 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.