lkml.org 
[lkml]   [2018]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.14 068/118] drm/i915/gvt: Clear the shadow page table entry after post-sync
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

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);
}


\
 
 \ /
  Last update: 2018-01-15 14:12    [W:0.449 / U:1.980 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site