This is a note to let you know that I've just added the patch titled
drm/i915/gvt: Clear the shadow page table entry after post-sync
to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: drm-i915-gvt-clear-the-shadow-page-table-entry-after-post-sync.patch and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 121d760d0788f95619049c63449d977065cab69d Mon Sep 17 00:00:00 2001
From: Zhi Wang zhi.a.wang@intel.com Date: Fri, 29 Dec 2017 02:50:08 +0800 Subject: drm/i915/gvt: Clear the shadow page table entry after post-sync
From: Zhi Wang zhi.a.wang@intel.com
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 zhi.a.wang@intel.com Signed-off-by: Zhenyu Wang zhenyuw@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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); }
Patches currently in stable-queue which might be from zhi.a.wang@intel.com are
queue-4.14/drm-i915-gvt-clear-the-shadow-page-table-entry-after-post-sync.patch