[Intel-gfx] [PATCH] drm/i915: Ignore preallocation of aliasing-ppgtt for vgpu

[Chris Wilson]

vGPU doesn't run on any system that supports aliasing-ppgtt, so we do
not need to force ourselves to preallocate the page directory.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 906dc6fff383..012a24d013b4 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2579,16 +2579,6 @@ static int init_aliasing_ppgtt(struct i915_ggtt *ggtt)
 		goto err_ppgtt;
 	}
 
-	/*
-	 * Note we only pre-allocate as far as the end of the global
-	 * GTT. On 48b / 4-level page-tables, the difference is very,
-	 * very significant! We have to preallocate as GVT/vgpu does
-	 * not like the page directory disappearing.
-	 */
-	err = ppgtt->vm.allocate_va_range(&ppgtt->vm, 0, ggtt->vm.total);
-	if (err)
-		goto err_ppgtt;
-
 	ggtt->alias = ppgtt;
 
 	GEM_BUG_ON(ggtt->vm.vma_ops.bind_vma != ggtt_bind_vma);
-- 
2.23.0