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 <[email protected]>
Signed-off-by: Michel Thierry <[email protected]>
---
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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