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be5e8dc84f
Now that the GGTT PTE updates go straight to GSMBASE (bypassing GTTMMADR) there should be no more risk of system hangs? So the "binder" (ie. update the PTEs via MI_UPDATE_GTT) is no longer necessary, disable it. My main worry with the MI_UPDATE_GTT are: - only used on this one platform so very limited testing coverage - async so more opprtunities to screw things up - what happens if the engine hangs while we're waiting for MI_UPDATE_GTT to finish? - requires working command submission, so even getting a working display now depends on a lot more extra components working correctly TODO: MI_UPDATE_GTT might be interesting as an optimization though, so perhaps someone should look into always using it (assuming the GPU is alive and well)? v2: Keep using MI_UPDATE_GTT on VM guests v3: use i915_direct_stolen_access() Reviewed-by: Nirmoy Das <nirmoy.das@intel.com> Tested-by: Paz Zcharya <pazz@chromium.org> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240202224340.30647-6-ville.syrjala@linux.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 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.