[PATCH 2/7] drm/i915/gvt: Let the caller choose if a shadow page should be put into hash table

[Zhi Wang]

As we want to re-use intel_vgpu_shadow_page in buidling scrach page table
and we don't want to put scrach page table page into hash table, a new
param is introduced to give the caller a choice to decide if a shadow page
should be put into hash table.

Signed-off-by: Zhi Wang <zhi.a.wang at intel.com>
---
 drivers/gpu/drm/i915/gvt/gtt.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index e5e5b5e..c8210d5 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -633,7 +633,7 @@ static void clean_guest_page(struct intel_vgpu *vgpu,
 }
 
 static inline int init_shadow_page(struct intel_vgpu *vgpu,
-		struct intel_vgpu_shadow_page *p, int type)
+		struct intel_vgpu_shadow_page *p, int type, bool hash)
 {
 	struct device *kdev = &vgpu->gvt->dev_priv->drm.pdev->dev;
 	dma_addr_t daddr;
@@ -650,7 +650,8 @@ static inline int init_shadow_page(struct intel_vgpu *vgpu,
 	INIT_HLIST_NODE(&p->node);
 
 	p->mfn = daddr >> I915_GTT_PAGE_SHIFT;
-	hash_add(vgpu->gtt.shadow_page_hash_table, &p->node, p->mfn);
+	if (hash)
+		hash_add(vgpu->gtt.shadow_page_hash_table, &p->node, p->mfn);
 	return 0;
 }
 
@@ -782,7 +783,7 @@ static struct intel_vgpu_ppgtt_spt *ppgtt_alloc_shadow_page(
 	 * TODO: guest page type may be different with shadow page type,
 	 *	 when we support PSE page in future.
 	 */
-	ret = init_shadow_page(vgpu, &spt->shadow_page, type);
+	ret = init_shadow_page(vgpu, &spt->shadow_page, type, true);
 	if (ret) {
 		gvt_vgpu_err("fail to initialize shadow page for spt\n");
 		goto err;
-- 
2.7.4