The shadow batch is an internal object, which doesn't have any page
clearing, and since the batch_len can be smaller than the object, we
should take care to clear it.
Testcase: igt/gen9_exec_parse/shadow-peek
Fixes: 4f7af1948abc ("drm/i915: Support ro ppgtt mapped cmdparser shadow
buffers")
Signed-off-by: Matthew Auld <matthew.a...@intel.com>
---
drivers/gpu/drm/i915/i915_cmd_parser.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c
b/drivers/gpu/drm/i915/i915_cmd_parser.c
index 8d88402387bd..ff3a0b8ccdd5 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -1147,6 +1147,13 @@ static u32 *copy_batch(struct drm_i915_gem_object
*dst_obj,
if (IS_ERR(dst))
return dst;
+ if (length < dst_obj->base.size) {
+ memset32(dst + length, 0,
+ (dst_obj->base.size - length) / sizeof(u32));
+ __i915_gem_object_flush_map(dst_obj, length,
+ dst_obj->base.size - length);
+ }
+
ret = i915_gem_object_pin_pages(src_obj);
if (ret) {
i915_gem_object_unpin_map(dst_obj);
--
2.26.2
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