Replace filling the GGTT entirely with scratch pages to avoid invalid accesses from VT-d overfetch of scanout by only surrounding scanout vma with guard pages. This eliminates the 100+ms delay in resume where we have to repopulate the GGTT with scratch.
This should also help in avoiding slow suspend/resume on GEN11/12 platforms. Which will also resolve issues with following reported errors : "slow framebuffer consoles issue impacts Linux S3" V2: solved checkpatch warning Chris Wilson (3): drm/i915: Wrap all access to i915_vma.node.start|size drm/i915: Introduce guard pages to i915_vma drm/i915: Refine VT-d scanout workaround drivers/gpu/drm/i915/display/intel_dpt.c | 4 +- drivers/gpu/drm/i915/display/intel_fbdev.c | 6 +- drivers/gpu/drm/i915/gem/i915_gem_domain.c | 13 +++++ .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 34 ++++++------ drivers/gpu/drm/i915/gem/i915_gem_mman.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_shrinker.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_tiling.c | 4 +- .../gpu/drm/i915/gem/selftests/huge_pages.c | 2 +- .../i915/gem/selftests/i915_gem_client_blt.c | 15 ++--- .../drm/i915/gem/selftests/i915_gem_context.c | 19 +++++-- .../drm/i915/gem/selftests/i915_gem_mman.c | 2 +- .../drm/i915/gem/selftests/igt_gem_utils.c | 6 +- drivers/gpu/drm/i915/gt/gen6_ppgtt.c | 2 +- drivers/gpu/drm/i915/gt/gen7_renderclear.c | 2 +- drivers/gpu/drm/i915/gt/gen8_ppgtt.c | 8 +-- drivers/gpu/drm/i915/gt/intel_ggtt.c | 42 +++++--------- drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c | 3 +- drivers/gpu/drm/i915/gt/intel_ppgtt.c | 5 +- drivers/gpu/drm/i915/gt/intel_renderstate.c | 2 +- .../gpu/drm/i915/gt/intel_ring_submission.c | 2 +- drivers/gpu/drm/i915/gt/selftest_engine_cs.c | 8 +-- drivers/gpu/drm/i915/gt/selftest_execlists.c | 18 +++--- drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 15 ++--- drivers/gpu/drm/i915/gt/selftest_lrc.c | 16 +++--- .../drm/i915/gt/selftest_ring_submission.c | 2 +- drivers/gpu/drm/i915/gt/selftest_rps.c | 12 ++-- .../gpu/drm/i915/gt/selftest_workarounds.c | 8 +-- drivers/gpu/drm/i915/i915_cmd_parser.c | 4 +- drivers/gpu/drm/i915/i915_debugfs.c | 2 +- drivers/gpu/drm/i915/i915_gem_gtt.h | 1 + drivers/gpu/drm/i915/i915_perf.c | 2 +- drivers/gpu/drm/i915/i915_vma.c | 55 ++++++++++++++----- drivers/gpu/drm/i915/i915_vma.h | 24 +++++++- drivers/gpu/drm/i915/i915_vma_types.h | 3 +- drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 12 +++- drivers/gpu/drm/i915/selftests/i915_request.c | 20 +++---- drivers/gpu/drm/i915/selftests/igt_spinner.c | 8 +-- 37 files changed, 226 insertions(+), 159 deletions(-) -- 2.31.1
