[PATCH 1/2] drm/i915/gvt: invalidate old ggtt page when update ggtt entry
hang.yuan at linux.intel.com
hang.yuan at linux.intel.com
Wed Sep 19 06:42:09 UTC 2018
From: Hang Yuan <hang.yuan at linux.intel.com>
Previously only cancelled dma map of a ggtt page when the ggtt entry was
cleared. This patch will cancel dma map of an old ggtt page as well when
the ggtt entry is updated with new page address.
Fixes: 7598e8700e9a(drm/i915/gvt: Missed to cancel dma map for ggtt entries)
Signed-off-by: Hang Yuan <hang.yuan at linux.intel.com>
---
drivers/gpu/drm/i915/gvt/gtt.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index 2402395..3a725ac 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -2263,16 +2263,18 @@ static int emulate_ggtt_mmio_write(struct intel_vgpu *vgpu, unsigned int off,
} else
ops->set_pfn(&m, dma_addr >> PAGE_SHIFT);
} else {
- ggtt_get_host_entry(ggtt_mm, &m, g_gtt_index);
- ggtt_invalidate_pte(vgpu, &m);
ops->set_pfn(&m, gvt->gtt.scratch_mfn);
ops->clear_present(&m);
}
out:
+ ggtt_set_guest_entry(ggtt_mm, &e, g_gtt_index);
+
+ ggtt_get_host_entry(ggtt_mm, &e, g_gtt_index);
+ ggtt_invalidate_pte(vgpu, &e);
+
ggtt_set_host_entry(ggtt_mm, &m, g_gtt_index);
ggtt_invalidate(gvt->dev_priv);
- ggtt_set_guest_entry(ggtt_mm, &e, g_gtt_index);
return 0;
}
--
2.7.4
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