drm/i915/gvt: Fix a bug of unexpectedly clear scratch page table
During a vGPU reset, the scratch page table shouldn't be cleared, what
needs to be cleared should be the scratch page.
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index 912d63b..d47b8b1 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -2395,8 +2395,6 @@ void intel_vgpu_reset_ggtt(struct intel_vgpu *vgpu)
*/
void intel_vgpu_reset_gtt(struct intel_vgpu *vgpu)
{
- int i;
-
ppgtt_free_all_shadow_page(vgpu);
/* Shadow pages are only created when there is no page
@@ -2406,11 +2404,4 @@ void intel_vgpu_reset_gtt(struct intel_vgpu *vgpu)
intel_vgpu_free_mm(vgpu, INTEL_GVT_MM_PPGTT);
intel_vgpu_reset_ggtt(vgpu);
-
- /* clear scratch page for security */
- for (i = GTT_TYPE_PPGTT_PTE_PT; i < GTT_TYPE_MAX; i++) {
- if (vgpu->gtt.scratch_pt[i].page != NULL)
- memset(page_address(vgpu->gtt.scratch_pt[i].page),
- 0, PAGE_SIZE);
- }
}