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When using MSI-X, hw engines report interrupt status and source to engine instance 0. For this scenario, in order to differentiate between the engines, we need to pass different status/source pointers in the LRC. The requirements on those pointers are: - Interrupt status should be 4KiB aligned - Interrupt source should be 64 bytes aligned To accommodate this, we duplicate the current memirq page layout - allocating a page for each engine instance and pass this page in the LRC. Note that the same page can be reused for different engine types. For example, an LRC executing on CCS #x will have pointers to page #x, and an LRC executing on BCS #x will have the same pointers. Thus, to locate the proper page, the pointer accessors were modified to receive the hw engine. Signed-off-by: Ilia Levi <ilia.levi@intel.com> Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240918053942.1331811-5-illevi@habana.ai
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.