On 7/16/2015 10:33 AM, Michel Thierry wrote:
Similar to PDs, while setting up a page directory pointer, make all entries of the pdp point to the scratch pd before mapping (and make all its entries point to the scratch page); this is to be safe in case of out of bound access or proactive prefetch. v2: Handle scratch_pdp allocation failure correctly, and keep initialize_px functions together (Akash) v3: Rebase after Mika's ppgtt cleanup / scratch merge patch series. Rely on the added macros to initialize the pdps. v4: Rebase after final merged version of Mika's ppgtt/scratch patches (and removed commit message part related to v3). Suggested-by: Akash Goel <akash.goel@xxxxxxxxx> Signed-off-by: Michel Thierry <michel.thierry@xxxxxxxxx> --- drivers/gpu/drm/i915/i915_gem_gtt.c | 38 +++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_gem_gtt.h | 1 + 2 files changed, 39 insertions(+)
This patch also initializes the PML4 so it should say so (I'll also add text about the scratch pdp, which the PML4 entries point to).
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