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Commit da9cc8de authored by Ping Gao's avatar Ping Gao Committed by Zhenyu Wang
Browse files

drm/i915/gvt: clear the vGPU reset logic 



Releasing shadow PPGTT pages is not enough when vGPU reset, the
guest page table tracking data should has same life-cycle with
all the shadow PPGTT pages; Otherwise there is no chance to
re-shadow the PPGTT pages without free the guest page table
tracking data.

This patch clear the PPGTT reset logic and make the vGPU reset in
working order.

v2: refactor some logic to avoid code duplicated.
v3: remove useless macro and add comments from Christophe.
v4: keep reset logic in reset function.

Signed-off-by: default avatarPing Gao <ping.a.gao@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent bab05930

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

+25 −10
Original line number Diff line number Diff line
@@ -2015,6 +2015,22 @@ int intel_vgpu_init_gtt(struct intel_vgpu *vgpu) 
	return create_scratch_page_tree(vgpu);

}



static void intel_vgpu_free_mm(struct intel_vgpu *vgpu, int type)

{

	struct list_head *pos, *n;

	struct intel_vgpu_mm *mm;



	list_for_each_safe(pos, n, &vgpu->gtt.mm_list_head) {

		mm = container_of(pos, struct intel_vgpu_mm, list);

		if (mm->type == type) {

			vgpu->gvt->gtt.mm_free_page_table(mm);

			list_del(&mm->list);

			list_del(&mm->lru_list);

			kfree(mm);

		}

	}

}



/**

 * intel_vgpu_clean_gtt - clean up per-vGPU graphics memory virulization

 * @vgpu: a vGPU
@@ -2027,19 +2043,11 @@ int intel_vgpu_init_gtt(struct intel_vgpu *vgpu) 
 */

void intel_vgpu_clean_gtt(struct intel_vgpu *vgpu)

{

	struct list_head *pos, *n;

	struct intel_vgpu_mm *mm;



	ppgtt_free_all_shadow_page(vgpu);

	release_scratch_page_tree(vgpu);



	list_for_each_safe(pos, n, &vgpu->gtt.mm_list_head) {

		mm = container_of(pos, struct intel_vgpu_mm, list);

		vgpu->gvt->gtt.mm_free_page_table(mm);

		list_del(&mm->list);

		list_del(&mm->lru_list);

		kfree(mm);

	}

	intel_vgpu_free_mm(vgpu, INTEL_GVT_MM_PPGTT);

	intel_vgpu_free_mm(vgpu, INTEL_GVT_MM_GGTT);

}



static void clean_spt_oos(struct intel_gvt *gvt)
@@ -2322,6 +2330,13 @@ void intel_vgpu_reset_gtt(struct intel_vgpu *vgpu, bool dmlr) 
	int i;



	ppgtt_free_all_shadow_page(vgpu);



	/* Shadow pages are only created when there is no page

	 * table tracking data, so remove page tracking data after

	 * removing the shadow pages.

	 */

	intel_vgpu_free_mm(vgpu, INTEL_GVT_MM_PPGTT);



	if (!dmlr)

		return;