Merge tag 'gvt-fixes-2019-04-11' of https://github.com/intel/gvt-linux into drm-intel-fixes

gvt-fixes-2019-04-11

- Fix sparse warning on iomem usage (Chris)
- Prevent use-after-free for ppgtt shadow table free (Chris)
- Fix display plane size regression for tiled surface (Xiong)

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190411064910.GF17995@zhen-hp.sh.intel.com

3 files changed, 18 insertions, 9 deletions

diff --git a/drivers/gpu/drm/i915/gvt/dmabuf.c b/drivers/gpu/drm/i915/gvt/dmabuf.c
index 5d887f7cc0d5..69a9a1b2ea4a 100644
--- a/drivers/gpu/drm/i915/gvt/dmabuf.c
+++ b/drivers/gpu/drm/i915/gvt/dmabuf.c
@@ -209,7 +209,7 @@ static int vgpu_get_plane_info(struct drm_device *dev,
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct intel_vgpu_primary_plane_format p;
 	struct intel_vgpu_cursor_plane_format c;
-	int ret;
+	int ret, tile_height = 1;
 
 	if (plane_id == DRM_PLANE_TYPE_PRIMARY) {
 		ret = intel_vgpu_decode_primary_plane(vgpu, &p);
@@ -228,12 +228,15 @@ static int vgpu_get_plane_info(struct drm_device *dev,
 			break;
 		case PLANE_CTL_TILED_X:
 			info->drm_format_mod = I915_FORMAT_MOD_X_TILED;
+			tile_height = 8;
 			break;
 		case PLANE_CTL_TILED_Y:
 			info->drm_format_mod = I915_FORMAT_MOD_Y_TILED;
+			tile_height = 32;
 			break;
 		case PLANE_CTL_TILED_YF:
 			info->drm_format_mod = I915_FORMAT_MOD_Yf_TILED;
+			tile_height = 32;
 			break;
 		default:
 			gvt_vgpu_err("invalid tiling mode: %x\n", p.tiled);
@@ -264,8 +267,8 @@ static int vgpu_get_plane_info(struct drm_device *dev,
 		return -EINVAL;
 	}
 
-	info->size = (info->stride * info->height + PAGE_SIZE - 1)
-		      >> PAGE_SHIFT;
+	info->size = (info->stride * roundup(info->height, tile_height)
+		      + PAGE_SIZE - 1) >> PAGE_SHIFT;
 	if (info->size == 0) {
 		gvt_vgpu_err("fb size is zero\n");
 		return -EINVAL;
diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index cf133ef03873..9814773882ec 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -750,14 +750,20 @@ static void ppgtt_free_spt(struct intel_vgpu_ppgtt_spt *spt)
 
 static void ppgtt_free_all_spt(struct intel_vgpu *vgpu)
 {
-	struct intel_vgpu_ppgtt_spt *spt;
+	struct intel_vgpu_ppgtt_spt *spt, *spn;
 	struct radix_tree_iter iter;
-	void **slot;
+	LIST_HEAD(all_spt);
+	void __rcu **slot;
 
+	rcu_read_lock();
 	radix_tree_for_each_slot(slot, &vgpu->gtt.spt_tree, &iter, 0) {
 		spt = radix_tree_deref_slot(slot);
-		ppgtt_free_spt(spt);
+		list_move(&spt->post_shadow_list, &all_spt);
 	}
+	rcu_read_unlock();
+
+	list_for_each_entry_safe(spt, spn, &all_spt, post_shadow_list)
+		ppgtt_free_spt(spt);
 }
 
 static int ppgtt_handle_guest_write_page_table_bytes(
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index d5fcc447d22f..a68addf95c23 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -905,7 +905,7 @@ static inline bool intel_vgpu_in_aperture(struct intel_vgpu *vgpu, u64 off)
 static int intel_vgpu_aperture_rw(struct intel_vgpu *vgpu, u64 off,
 		void *buf, unsigned long count, bool is_write)
 {
-	void *aperture_va;
+	void __iomem *aperture_va;
 
 	if (!intel_vgpu_in_aperture(vgpu, off) ||
 	    !intel_vgpu_in_aperture(vgpu, off + count)) {
@@ -920,9 +920,9 @@ static int intel_vgpu_aperture_rw(struct intel_vgpu *vgpu, u64 off,
 		return -EIO;
 
 	if (is_write)
-		memcpy(aperture_va + offset_in_page(off), buf, count);
+		memcpy_toio(aperture_va + offset_in_page(off), buf, count);
 	else
-		memcpy(buf, aperture_va + offset_in_page(off), count);
+		memcpy_fromio(buf, aperture_va + offset_in_page(off), count);
 
 	io_mapping_unmap(aperture_va);