From: Matthew Auld matthew.auld@intel.com
commit 641382e9b44fba81a0778e1914ee35b8471121f9 upstream.
The reloc batch is short lived but can exist in the user visible ppGTT, and since it's backed by an internal object, which lacks page clearing, we should take care to clear it upfront.
Signed-off-by: Matthew Auld matthew.auld@intel.com Reviewed-by: Chris Wilson chris@chris-wilson.co.uk Signed-off-by: Chris Wilson chris@chris-wilson.co.uk Link: https://patchwork.freedesktop.org/patch/msgid/20201224151358.401345-2-matthe... Cc: stable@vger.kernel.org (cherry picked from commit 26ebc511e799f621357982ccc37a7987a56a00f4) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -1046,7 +1046,7 @@ static void reloc_gpu_flush(struct i915_ GEM_BUG_ON(cache->rq_size >= obj->base.size / sizeof(u32)); cache->rq_cmd[cache->rq_size] = MI_BATCH_BUFFER_END;
- __i915_gem_object_flush_map(obj, 0, sizeof(u32) * (cache->rq_size + 1)); + i915_gem_object_flush_map(obj); i915_gem_object_unpin_map(obj);
intel_gt_chipset_flush(cache->rq->engine->gt); @@ -1296,6 +1296,8 @@ static int __reloc_gpu_alloc(struct i915 goto err_pool; }
+ memset32(cmd, 0, pool->obj->base.size / sizeof(u32)); + batch = i915_vma_instance(pool->obj, vma->vm, NULL); if (IS_ERR(batch)) { err = PTR_ERR(batch);