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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>
This commit is contained in:
Zhi Wang 2017-10-10 17:14:13 +08:00 committed by Zhenyu Wang
parent 22115cef08
commit 7422064883
1 changed files with 0 additions and 9 deletions
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9
drivers/gpu/drm/i915/gvt/gtt.c
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@ -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);
}
}