From b0cc4dca4f1066f385a92baf6214d7f313353d76 Mon Sep 17 00:00:00 2001 From: Matthew Auld Date: Thu, 28 Oct 2021 10:26:38 +0100 Subject: [PATCH] drm/i915/gtt: stop caching the scratch page MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Matthew Auld Cc: Thomas Hellström Cc: Chris Wilson Cc: Ramalingam C Reviewed-by: Thomas Hellström Link: https://patchwork.freedesktop.org/patch/msgid/20211028092638.3142258-2-matthew.auld@intel.com --- 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 8af2f709571c1..9966e9dc5218c 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; } -- 2.30.2