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When system does not have mappable aperture, ggtt->mappable_end=0. In this case if we pass PIN_MAPPABLE when pinning vma, the pinning code will return -ENOSPC. So conditionally set PIN_MAPPABLE if HAS_GMCH(). Suggested-by: Chris P Wilson <chris.p.wilson@intel.com> Signed-off-by: CQ Tang <cq.tang@intel.com> Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com> Cc: Ap Kamal <kamal.ap@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Nirmoy Das <nirmoy.das@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220315181425.576828-6-matthew.auld@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.