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e217f22041
Implement pmu support for gen2 so that one can use intel_gpu_top on it once again. Gen2 lacks MI_MODE/MODE_IDLE so we'll have to do a bit more work to determine the state of the engine: - to determine if the ring contains unconsumed data we can simply compare RING_TAIL vs. RING_HEAD - also check RING_HEAD vs. ACTHD to catch cases where the hardware is still executing a batch buffer but the ring head has already caught up with the tail. Not entirely sure if that's actually possible or not, but maybe it can happen if the batch buffer is initiated from the very end of the ring? But even if not strictly necessary there's no real harm in checking anyway. - MI_WAIT_FOR_EVENT can be detected via a dedicated bit in RING_HEAD v2: Use genX_ prefix rarther than suffix (Jani) Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241008214349.23331-5-ville.syrjala@linux.intel.com Acked-by: Jani Nikula <jani.nikula@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 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.