Normal users shouldn't be hitting this, likely this would indicate a
userspace bug. So don't bother caching, which should be safe now that we
manually flush the page.
Suggested-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/gen8_ppgtt.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
index 8af2f709571c..9966e9dc5218 100644
--- a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
@@ -651,7 +651,7 @@ static int gen8_init_scratch(struct i915_address_space *vm)
vm->scratch[0]->encode =
gen8_pte_encode(px_dma(vm->scratch[0]),
- I915_CACHE_LLC, pte_flags);
+ I915_CACHE_NONE, pte_flags);
for (i = 1; i <= vm->top; i++) {
struct drm_i915_gem_object *obj;
@@ -667,7 +667,7 @@ static int gen8_init_scratch(struct i915_address_space *vm)
}
fill_px(obj, vm->scratch[i - 1]->encode);
- obj->encode = gen8_pde_encode(px_dma(obj), I915_CACHE_LLC);
+ obj->encode = gen8_pde_encode(px_dma(obj), I915_CACHE_NONE);
vm->scratch[i] = obj;
}
--
2.26.3
