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Alison Schofield
b83ee9614a
When DPA->SPA translation was introduced, it included a helper that applied the XOR maps to do the CXL HPA -> SPA translation for XOR region interleaves. In preparation for adding SPA->DPA address translation, introduce the reverse callback. The root decoder callback is defined generically and not all usages may be self inverting like this XOR function. Add another root decoder callback that is the spa_to_hpa function. Update the existing cxl_xor_hpa_to_spa() with a name that reflects what it does without directionality: cxl_apply_xor_maps(), a generic parameter: addr replaces hpa, and code comments stating that the function supports the translation in either direction. Signed-off-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Link: https://patch.msgid.link/79d9d72230c599cae94d7221781ead6392ae6d3f.1754290144.git.alison.schofield@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.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 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.