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11a2407ed5
Although xe_migrate_clear() has a value argument, currently the driver is only passing 0 at all the places this function is invoked with the exception the kunit tests are using the parameter to validate this function with different values. xe_migrate_clear() is failing on platforms with link copy engines because xe_migrate_clear() via emit_clear() is using the blitter instruction XY_FAST_COLOR_BLT to clear the memory. But this instruction is not supported by link copy engine. So the solution is to use the alternate instruction MEM_SET when platform contains link copy engine. But MEM_SET instruction accepts only 8-bit value for setting whereas the value agrument of xe_migrate_clear() is 32-bit. So instead of spreading this limitation around all invocations of xe_migrate_clear() and causing more confusion, it was decided to not accept any value itself as driver does not really need this currently. All the kunit tests are adapted as per the new function prototype. This will be followed by a patch to add support for link copy engines. Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com> Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> |
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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 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.