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Commit 74220648 authored by Zhi Wang's avatar Zhi Wang Committed by Zhenyu Wang
Browse files

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: default avatarZhi Wang <zhi.a.wang@intel.com>
parent 22115cef

drivers/gpu/drm/i915/gvt/gtt.c

+0 −9
Original line number Diff line number Diff line
@@ -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);

	}

}