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Commit f42259ef authored by Hang Yuan's avatar Hang Yuan Committed by Zhenyu Wang
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drm/i915/gvt: invalidate old ggtt page when update ggtt entry 



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: 7598e870(drm/i915/gvt: Missed to cancel dma map for ggtt entries)
Signed-off-by: default avatarHang Yuan <hang.yuan@linux.intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 7759ca3a

drivers/gpu/drm/i915/gvt/gtt.c

+5 −3
Original line number Diff line number Diff line
@@ -2259,16 +2259,18 @@ 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;

}