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intel_hdcp_component_init()->...->intel_hdcp_gsc_initialize_message() will allocate ggtt address space for some hdcp gsc message thing. That is currently being done way too early as we haven't even taken over the BIOS fb yet. So this has the potential of corrupting ggtt PTEs that need to be preserved until the BIOS fb takover is done. Only call intel_hdcp_component_init() once all the BIOS fb takeover, and full ggtt init (which currently also needs to reserve very specific ranges of ggtt, thus assuming that no one else has stolen them yet) is done. Cc: Suraj Kandpal <suraj.kandpal@intel.com> Cc: Alan Previn <alan.previn.teres.alexis@intel.com> Cc: Uma Shankar <uma.shankar@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20231215110933.9188-2-ville.syrjala@linux.intel.com Reviewed-by: Andrzej Hajda <andrzej.hajda@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.