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MTL's primary GT can continue to use the same engine TLB invalidation programming as past Xe_HP-based platforms. However the media GT needs some special handling: * Invalidation registers on the media GT are singleton registers (unlike the primary GT where they are still MCR). * Since the GSC is now exposed as an engine, there's a new register to use for TLB invalidation. The offset is identical to the compute engine offset, but this is expected --- compute engines only exist on the primary GT while the GSC only exists on the media GT. * Although there's only a single GSC engine instance, it inexplicably uses bit 1 to request invalidations rather than bit 0. v2: - Add a 'regs == xelpmp_regs' condition to the GSC instance handling. If the registers change on a future platform, the GSC-specific handling is likely to change as well. (Andrzej) Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Andrzej Hajda <andrzej.hajda@intel.com> Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230224012009.3594691-1-matthew.d.roper@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.