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fa78e188d8
Release all mmap mappings for all vram objects which are associated
with userfault such that, while pcie function in D3hot, any access
to memory mappings will raise a userfault.
Upon userfault, in order to access memory mappings, if graphics
function is in D3 then runtime resume of dgpu will be triggered to
transition to D0.
v2:
- Avoid iomem check before bo migration check as bo can migrate
to system memory (Matthew Auld)
v3:
- Delete bo userfault link during bo destroy
- Upon bo move (vram-smem), do bo userfault link deletion in
xe_bo_move_notify instead of xe_bo_move (Thomas Hellström)
- Grab lock in rpm hook while deleting bo userfault link (Matthew Auld)
v4:
- Add kernel doc and wrap vram_userfault related
stuff in the structure (Matthew Auld)
- Get rpm wakeref before taking dma reserve lock (Matthew Auld)
- In suspend path apply lock for entire list op
including list iteration (Matthew Auld)
v5:
- Use mutex lock instead of spin lock
v6:
- Fix review comments (Matthew Auld)
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Badal Nilawar <badal.nilawar@intel.com>
Acked-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> #For the xe_bo_move_notify() changes
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://lore.kernel.org/r/20240104130702.950078-1-badal.nilawar@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@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.