4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Zhi Wang <[email protected]> commit 121d760d0788f95619049c63449d977065cab69d upstream. A shadow page table entry needs to be cleared after being set as post-sync. This patch fixes the recent error reported in Win7-32 test. Fixes: 2707e4446688 ("drm/i915/gvt: vGPU graphics memory virtualization") Signed-off-by: Zhi Wang <[email protected]> Signed-off-by: Zhenyu Wang <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/gpu/drm/i915/gvt/gtt.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/i915/gvt/gtt.c +++ b/drivers/gpu/drm/i915/gvt/gtt.c @@ -1359,12 +1359,15 @@ static int ppgtt_handle_guest_write_page return ret; } else { if (!test_bit(index, spt->post_shadow_bitmap)) { + int type = spt->shadow_page.type; + ppgtt_get_shadow_entry(spt, &se, index); ret = ppgtt_handle_guest_entry_removal(gpt, &se, index); if (ret) return ret; + ops->set_pfn(&se, vgpu->gtt.scratch_pt[type].page_mfn); + ppgtt_set_shadow_entry(spt, &se, index); } - ppgtt_set_post_shadow(spt, index); }
