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56e1a4cc25
Add tests for some of the more common STE update operations that we expect to see, as well as some artificial STE updates to test the edges of arm_smmu_write_entry. These also serve as a record of which common operation is expected to be hitless, and how many syncs they require. arm_smmu_write_entry implements a generic algorithm that updates an STE/CD to any other abritrary STE/CD configuration. The update requires a sequence of write+sync operations with some invariants that must be held true after each sync. arm_smmu_write_entry lends itself well to unit-testing since the function's interaction with the STE/CD is already abstracted by input callbacks that we can hook to introspect into the sequence of operations. We can use these hooks to guarantee that invariants are held throughout the entire update operation. Link: https://lore.kernel.org/r/20240106083617.1173871-3-mshavit@google.com Tested-by: Nicolin Chen <nicolinc@nvidia.com> Signed-off-by: Michael Shavit <mshavit@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/9-v9-5040dc602008+177d7-smmuv3_newapi_p2_jgg@nvidia.com Signed-off-by: Will Deacon <will@kernel.org> |
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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.