[Intel-gfx] [PATCH] drm/i915: Reserve shadow batch VMA analogue to others

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

If not pinned VMA can become an eviction target just before it needs to be
executed which breaks the internal object lifetime rules.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=87399
---
 drivers/gpu/drm/i915/i915_gem_execbuffer.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 1d6e092..e3ef177 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1081,6 +1081,7 @@ i915_gem_execbuffer_parse(struct intel_engine_cs *ring,
 {
 	struct drm_i915_private *dev_priv = to_i915(batch_obj->base.dev);
 	struct drm_i915_gem_object *shadow_batch_obj;
+	bool need_reloc = false;
 	int ret;
 
 	shadow_batch_obj = i915_gem_batch_pool_get(&dev_priv->mm.batch_pool,
@@ -1106,6 +1107,7 @@ i915_gem_execbuffer_parse(struct intel_engine_cs *ring,
 		vma->exec_entry = shadow_exec_entry;
 		vma->exec_entry->flags = __EXEC_OBJECT_PURGEABLE;
 		drm_gem_object_reference(&shadow_batch_obj->base);
+		i915_gem_execbuffer_reserve_vma(vma, ring, &need_reloc);
 		list_add_tail(&vma->exec_list, &eb->vmas);
 
 		shadow_batch_obj->base.pending_read_domains =
-- 
2.2.0