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f39a89b8f7
Recently gvt shadow ctx create ppgtt table and this ppgtt's root
pointer is modified at workload dispatch, then we lose the original
ppgtt's root pointer, this causes the ppgtt destroy function abnormal
as it will release the wrong root table.
This patch save i915 context ppgtt root pointer at shadow
ctx creation and restore it at shadow ctx destruction.
v2: Split save and restore function (Zhenyu)
Fixes:4f15665ccbba("drm/i915: Add ppgtt to GVT GEM context")
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.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.