1 files changed, 17 insertions, 14 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
index 67d14afa6623..a94be0306464 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
@@ -6,6 +6,9 @@
 #include <linux/slab.h> /* fault-inject.h is not standalone! */
 
 #include <linux/fault-inject.h>
+#include <linux/sched/mm.h>
+
+#include <drm/drm_cache.h>
 
 #include "gem/i915_gem_lmem.h"
 #include "i915_trace.h"
@@ -221,19 +224,6 @@ void i915_address_space_init(struct i915_address_space *vm, int subclass)
 	INIT_LIST_HEAD(&vm->bound_list);
 }
 
-void clear_pages(struct i915_vma *vma)
-{
-	GEM_BUG_ON(!vma->pages);
-
-	if (vma->pages != vma->obj->mm.pages) {
-		sg_free_table(vma->pages);
-		kfree(vma->pages);
-	}
-	vma->pages = NULL;
-
-	memset(&vma->page_sizes, 0, sizeof(vma->page_sizes));
-}
-
 void *__px_vaddr(struct drm_i915_gem_object *p)
 {
 	enum i915_map_type type;
@@ -273,6 +263,7 @@ static void poison_scratch_page(struct drm_i915_gem_object *scratch)
 		val = POISON_FREE;
 
 	memset(vaddr, val, scratch->base.size);
+	drm_clflush_virt_range(vaddr, scratch->base.size);
 }
 
 int setup_scratch_page(struct i915_address_space *vm)
@@ -298,7 +289,7 @@ int setup_scratch_page(struct i915_address_space *vm)
 	do {
 		struct drm_i915_gem_object *obj;
 
-		obj = vm->alloc_pt_dma(vm, size);
+		obj = vm->alloc_scratch_dma(vm, size);
 		if (IS_ERR(obj))
 			goto skip;
 
@@ -334,6 +325,18 @@ skip:
 		if (size == I915_GTT_PAGE_SIZE_4K)
 			return -ENOMEM;
 
+		/*
+		 * If we need 64K minimum GTT pages for device local-memory,
+		 * like on XEHPSDV, then we need to fail the allocation here,
+		 * otherwise we can't safely support the insertion of
+		 * local-memory pages for this vm, since the HW expects the
+		 * correct physical alignment and size when the page-table is
+		 * operating in 64K GTT mode, which includes any scratch PTEs,
+		 * since userspace can still touch them.
+		 */
+		if (HAS_64K_PAGES(vm->i915))
+			return -ENOMEM;
+
 		size = I915_GTT_PAGE_SIZE_4K;
 	} while (1);
 }