Merge tag 'gvt-next-2017-03-30' of https://github.com/01org/gvt-linux into drm-intel-next-queued

gvt-next-2017-03-30

- Add mdev attribute group for per-vgpu info
- Time slice based vGPU scheduling QoS support (Gao Ping)
- Initial KBL support for E3 server (Han Xu)
- other misc.

Link: http://patchwork.freedesktop.org/patch/msgid/20170330100516.dkavi3rtlsmnoepi@zhen-hp.sh.intel.comSigned-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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

@@ -1215,7 +1215,7 @@ static int gen8_check_mi_display_flip(struct parser_exec_state *s,
 	if (!info->async_flip)
 		return 0;
 
-	if (IS_SKYLAKE(dev_priv)) {
+	if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
 		stride = vgpu_vreg(s->vgpu, info->stride_reg) & GENMASK(9, 0);
 		tile = (vgpu_vreg(s->vgpu, info->ctrl_reg) &
 				GENMASK(12, 10)) >> 10;
@@ -1243,7 +1243,7 @@ static int gen8_update_plane_mmio_from_mi_display_flip(
 
 	set_mask_bits(&vgpu_vreg(vgpu, info->surf_reg), GENMASK(31, 12),
 		      info->surf_val << 12);
-	if (IS_SKYLAKE(dev_priv)) {
+	if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
 		set_mask_bits(&vgpu_vreg(vgpu, info->stride_reg), GENMASK(9, 0),
 			      info->stride_val);
 		set_mask_bits(&vgpu_vreg(vgpu, info->ctrl_reg), GENMASK(12, 10),
@@ -1267,7 +1267,7 @@ static int decode_mi_display_flip(struct parser_exec_state *s,
 
 	if (IS_BROADWELL(dev_priv))
 		return gen8_decode_mi_display_flip(s, info);
-	if (IS_SKYLAKE(dev_priv))
+	if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
 		return skl_decode_mi_display_flip(s, info);
 
 	return -ENODEV;
@@ -1278,7 +1278,9 @@ static int check_mi_display_flip(struct parser_exec_state *s,
 {
 	struct drm_i915_private *dev_priv = s->vgpu->gvt->dev_priv;
 
-	if (IS_BROADWELL(dev_priv) || IS_SKYLAKE(dev_priv))
+	if (IS_BROADWELL(dev_priv)
+		|| IS_SKYLAKE(dev_priv)
+		|| IS_KABYLAKE(dev_priv))
 		return gen8_check_mi_display_flip(s, info);
 	return -ENODEV;
 }
@@ -1289,7 +1291,9 @@ static int update_plane_mmio_from_mi_display_flip(
 {
 	struct drm_i915_private *dev_priv = s->vgpu->gvt->dev_priv;
 
-	if (IS_BROADWELL(dev_priv) || IS_SKYLAKE(dev_priv))
+	if (IS_BROADWELL(dev_priv)
+		|| IS_SKYLAKE(dev_priv)
+		|| IS_KABYLAKE(dev_priv))
 		return gen8_update_plane_mmio_from_mi_display_flip(s, info);
 	return -ENODEV;
 }
@@ -1569,7 +1573,8 @@ static int batch_buffer_needs_scan(struct parser_exec_state *s)
 {
 	struct intel_gvt *gvt = s->vgpu->gvt;
 
-	if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) {
+	if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)
+		|| IS_KABYLAKE(gvt->dev_priv)) {
 		/* BDW decides privilege based on address space */
 		if (cmd_val(s, 0) & (1 << 8))
 			return 0;
@@ -2604,6 +2609,9 @@ static int scan_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 	unsigned long gma_head, gma_tail, gma_bottom, ring_size, ring_tail;
 	struct parser_exec_state s;
 	int ret = 0;
+	struct intel_vgpu_workload *workload = container_of(wa_ctx,
+				struct intel_vgpu_workload,
+				wa_ctx);
 
 	/* ring base is page aligned */
 	if (WARN_ON(!IS_ALIGNED(wa_ctx->indirect_ctx.guest_gma, GTT_PAGE_SIZE)))
@@ -2618,14 +2626,14 @@ static int scan_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 
 	s.buf_type = RING_BUFFER_INSTRUCTION;
 	s.buf_addr_type = GTT_BUFFER;
-	s.vgpu = wa_ctx->workload->vgpu;
-	s.ring_id = wa_ctx->workload->ring_id;
+	s.vgpu = workload->vgpu;
+	s.ring_id = workload->ring_id;
 	s.ring_start = wa_ctx->indirect_ctx.guest_gma;
 	s.ring_size = ring_size;
 	s.ring_head = gma_head;
 	s.ring_tail = gma_tail;
 	s.rb_va = wa_ctx->indirect_ctx.shadow_va;
-	s.workload = wa_ctx->workload;
+	s.workload = workload;
 
 	ret = ip_gma_set(&s, gma_head);
 	if (ret)
@@ -2708,12 +2716,15 @@ static int shadow_indirect_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 {
 	int ctx_size = wa_ctx->indirect_ctx.size;
 	unsigned long guest_gma = wa_ctx->indirect_ctx.guest_gma;
-	struct intel_vgpu *vgpu = wa_ctx->workload->vgpu;
+	struct intel_vgpu_workload *workload = container_of(wa_ctx,
+					struct intel_vgpu_workload,
+					wa_ctx);
+	struct intel_vgpu *vgpu = workload->vgpu;
 	struct drm_i915_gem_object *obj;
 	int ret = 0;
 	void *map;
 
-	obj = i915_gem_object_create(wa_ctx->workload->vgpu->gvt->dev_priv,
+	obj = i915_gem_object_create(workload->vgpu->gvt->dev_priv,
 				     roundup(ctx_size + CACHELINE_BYTES,
 					     PAGE_SIZE));
 	if (IS_ERR(obj))
@@ -2733,8 +2744,8 @@ static int shadow_indirect_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 		goto unmap_src;
 	}
 
-	ret = copy_gma_to_hva(wa_ctx->workload->vgpu,
-				wa_ctx->workload->vgpu->gtt.ggtt_mm,
+	ret = copy_gma_to_hva(workload->vgpu,
+				workload->vgpu->gtt.ggtt_mm,
 				guest_gma, guest_gma + ctx_size,
 				map);
 	if (ret < 0) {
@@ -2772,7 +2783,10 @@ static int combine_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 int intel_gvt_scan_and_shadow_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 {
 	int ret;
-	struct intel_vgpu *vgpu = wa_ctx->workload->vgpu;
+	struct intel_vgpu_workload *workload = container_of(wa_ctx,
+					struct intel_vgpu_workload,
+					wa_ctx);
+	struct intel_vgpu *vgpu = workload->vgpu;
 
 	if (wa_ctx->indirect_ctx.size == 0)
 		return 0;

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

@@ -161,8 +161,9 @@ static unsigned char virtual_dp_monitor_edid[GVT_EDID_NUM][EDID_SIZE] = {
 
 #define DPCD_HEADER_SIZE        0xb
 
+/* let the virtual display supports DP1.2 */
 static u8 dpcd_fix_data[DPCD_HEADER_SIZE] = {
-	0x11, 0x0a, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+	0x12, 0x014, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 };
 
 static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
@@ -172,9 +173,20 @@ static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
 			SDE_PORTC_HOTPLUG_CPT |
 			SDE_PORTD_HOTPLUG_CPT);
 
-	if (IS_SKYLAKE(dev_priv))
+	if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
 		vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTA_HOTPLUG_SPT |
 				SDE_PORTE_HOTPLUG_SPT);
+		vgpu_vreg(vgpu, SKL_FUSE_STATUS) |=
+				SKL_FUSE_DOWNLOAD_STATUS |
+				SKL_FUSE_PG0_DIST_STATUS |
+				SKL_FUSE_PG1_DIST_STATUS |
+				SKL_FUSE_PG2_DIST_STATUS;
+		vgpu_vreg(vgpu, LCPLL1_CTL) |=
+				LCPLL_PLL_ENABLE |
+				LCPLL_PLL_LOCK;
+		vgpu_vreg(vgpu, LCPLL2_CTL) |= LCPLL_PLL_ENABLE;
+
+	}
 
 	if (intel_vgpu_has_monitor_on_port(vgpu, PORT_B)) {
 		vgpu_vreg(vgpu, SDEISR) |= SDE_PORTB_HOTPLUG_CPT;
@@ -191,7 +203,7 @@ static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
 		vgpu_vreg(vgpu, SFUSE_STRAP) |= SFUSE_STRAP_DDID_DETECTED;
 	}
 
-	if (IS_SKYLAKE(dev_priv) &&
+	if ((IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) &&
 			intel_vgpu_has_monitor_on_port(vgpu, PORT_E)) {
 		vgpu_vreg(vgpu, SDEISR) |= SDE_PORTE_HOTPLUG_SPT;
 	}
@@ -353,7 +365,7 @@ void intel_vgpu_clean_display(struct intel_vgpu *vgpu)
 {
 	struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
 
-	if (IS_SKYLAKE(dev_priv))
+	if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
 		clean_virtual_dp_monitor(vgpu, PORT_D);
 	else
 		clean_virtual_dp_monitor(vgpu, PORT_B);
@@ -375,7 +387,7 @@ int intel_vgpu_init_display(struct intel_vgpu *vgpu, u64 resolution)
 
 	intel_vgpu_init_i2c_edid(vgpu);
 
-	if (IS_SKYLAKE(dev_priv))
+	if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
 		return setup_virtual_dp_monitor(vgpu, PORT_D, GVT_DP_D,
 						resolution);
 	else

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

@@ -394,9 +394,11 @@ static void prepare_shadow_batch_buffer(struct intel_vgpu_workload *workload)
 
 static int update_wa_ctx_2_shadow_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 {
-	int ring_id = wa_ctx->workload->ring_id;
-	struct i915_gem_context *shadow_ctx =
-		wa_ctx->workload->vgpu->shadow_ctx;
+	struct intel_vgpu_workload *workload = container_of(wa_ctx,
+					struct intel_vgpu_workload,
+					wa_ctx);
+	int ring_id = workload->ring_id;
+	struct i915_gem_context *shadow_ctx = workload->vgpu->shadow_ctx;
 	struct drm_i915_gem_object *ctx_obj =
 		shadow_ctx->engine[ring_id].state->obj;
 	struct execlist_ring_context *shadow_ring_context;
@@ -680,7 +682,6 @@ static int submit_context(struct intel_vgpu *vgpu, int ring_id,
 			CACHELINE_BYTES;
 		workload->wa_ctx.per_ctx.guest_gma =
 			per_ctx & PER_CTX_ADDR_MASK;
-		workload->wa_ctx.workload = workload;
 
 		WARN_ON(workload->wa_ctx.indirect_ctx.size && !(per_ctx & 0x1));
 	}

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

@@ -2220,7 +2220,8 @@ int intel_gvt_init_gtt(struct intel_gvt *gvt)
 
 	gvt_dbg_core("init gtt\n");
 
-	if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) {
+	if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)
+		|| IS_KABYLAKE(gvt->dev_priv)) {
 		gvt->gtt.pte_ops = &gen8_gtt_pte_ops;
 		gvt->gtt.gma_ops = &gen8_gtt_gma_ops;
 		gvt->gtt.mm_alloc_page_table = gen8_mm_alloc_page_table;

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

@@ -106,7 +106,8 @@ static void init_device_info(struct intel_gvt *gvt)
 	struct intel_gvt_device_info *info = &gvt->device_info;
 	struct pci_dev *pdev = gvt->dev_priv->drm.pdev;
 
-	if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) {
+	if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)
+		|| IS_KABYLAKE(gvt->dev_priv)) {
 		info->max_support_vgpus = 8;
 		info->cfg_space_size = 256;
 		info->mmio_size = 2 * 1024 * 1024;
@@ -143,6 +144,11 @@ static int gvt_service_thread(void *data)
 			intel_gvt_emulate_vblank(gvt);
 			mutex_unlock(&gvt->lock);
 		}
+
+		if (test_and_clear_bit(INTEL_GVT_REQUEST_SCHED,
+					(void *)&gvt->service_request)) {
+			intel_gvt_schedule(gvt);
+		}
 	}
 
 	return 0;
@@ -196,6 +202,8 @@ void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
 
 	idr_destroy(&gvt->vgpu_idr);
 
+	intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
+
 	kfree(dev_priv->gvt);
 	dev_priv->gvt = NULL;
 }
@@ -214,6 +222,7 @@ void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
 int intel_gvt_init_device(struct drm_i915_private *dev_priv)
 {
 	struct intel_gvt *gvt;
+	struct intel_vgpu *vgpu;
 	int ret;
 
 	/*
@@ -286,6 +295,14 @@ int intel_gvt_init_device(struct drm_i915_private *dev_priv)
 		goto out_clean_types;
 	}
 
+	vgpu = intel_gvt_create_idle_vgpu(gvt);
+	if (IS_ERR(vgpu)) {
+		ret = PTR_ERR(vgpu);
+		gvt_err("failed to create idle vgpu\n");
+		goto out_clean_types;
+	}
+	gvt->idle_vgpu = vgpu;
+
 	gvt_dbg_core("gvt device initialization is done\n");
 	dev_priv->gvt = gvt;
 	return 0;

drivers/gpu/drm/i915/gvt/gvt.h

@@ -138,6 +138,10 @@ struct intel_vgpu_display {
 	struct intel_vgpu_sbi sbi;
 };
 
+struct vgpu_sched_ctl {
+	int weight;
+};
+
 struct intel_vgpu {
 	struct intel_gvt *gvt;
 	int id;
@@ -147,6 +151,7 @@ struct intel_vgpu {
 	bool failsafe;
 	bool resetting;
 	void *sched_data;
+	struct vgpu_sched_ctl sched_ctl;
 
 	struct intel_vgpu_fence fence;
 	struct intel_vgpu_gm gm;
@@ -160,6 +165,7 @@ struct intel_vgpu {
 	struct list_head workload_q_head[I915_NUM_ENGINES];
 	struct kmem_cache *workloads;
 	atomic_t running_workload_num;
+	ktime_t last_ctx_submit_time;
 	DECLARE_BITMAP(tlb_handle_pending, I915_NUM_ENGINES);
 	struct i915_gem_context *shadow_ctx;
 
@@ -215,6 +221,7 @@ struct intel_vgpu_type {
 	unsigned int low_gm_size;
 	unsigned int high_gm_size;
 	unsigned int fence;
+	unsigned int weight;
 	enum intel_vgpu_edid resolution;
 };
 
@@ -236,6 +243,7 @@ struct intel_gvt {
 	DECLARE_HASHTABLE(cmd_table, GVT_CMD_HASH_BITS);
 	struct intel_vgpu_type *types;
 	unsigned int num_types;
+	struct intel_vgpu *idle_vgpu;
 
 	struct task_struct *service_thread;
 	wait_queue_head_t service_thread_wq;
@@ -249,6 +257,7 @@ static inline struct intel_gvt *to_gvt(struct drm_i915_private *i915)
 
 enum {
 	INTEL_GVT_REQUEST_EMULATE_VBLANK = 0,
+	INTEL_GVT_REQUEST_SCHED = 1,
 };
 
 static inline void intel_gvt_request_service(struct intel_gvt *gvt,
@@ -322,6 +331,8 @@ struct intel_vgpu_creation_params {
 	__u64 resolution;
 	__s32 primary;
 	__u64 vgpu_id;
+
+	__u32 weight;
 };
 
 int intel_vgpu_alloc_resource(struct intel_vgpu *vgpu,
@@ -376,6 +387,8 @@ static inline void intel_vgpu_write_pci_bar(struct intel_vgpu *vgpu,
 int intel_gvt_init_vgpu_types(struct intel_gvt *gvt);
 void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt);
 
+struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt);
+void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu);
 struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
 					 struct intel_vgpu_type *type);
 void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu);

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

@@ -580,7 +580,7 @@ static void gen8_init_irq(
 
 		SET_BIT_INFO(irq, 4, PRIMARY_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
 		SET_BIT_INFO(irq, 5, SPRITE_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
-	} else if (IS_SKYLAKE(gvt->dev_priv)) {
+	} else if (IS_SKYLAKE(gvt->dev_priv) || IS_KABYLAKE(gvt->dev_priv)) {
 		SET_BIT_INFO(irq, 25, AUX_CHANNEL_B, INTEL_GVT_IRQ_INFO_DE_PORT);
 		SET_BIT_INFO(irq, 26, AUX_CHANNEL_C, INTEL_GVT_IRQ_INFO_DE_PORT);
 		SET_BIT_INFO(irq, 27, AUX_CHANNEL_D, INTEL_GVT_IRQ_INFO_DE_PORT);
@@ -690,7 +690,8 @@ int intel_gvt_init_irq(struct intel_gvt *gvt)
 
 	gvt_dbg_core("init irq framework\n");
 
-	if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) {
+	if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)
+		|| IS_KABYLAKE(gvt->dev_priv)) {
 		irq->ops = &gen8_irq_ops;
 		irq->irq_map = gen8_irq_map;
 	} else {

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

@@ -295,10 +295,12 @@ static ssize_t description_show(struct kobject *kobj, struct device *dev,
 		return 0;
 
 	return sprintf(buf, "low_gm_size: %dMB\nhigh_gm_size: %dMB\n"
-		       "fence: %d\nresolution: %s\n",
+		       "fence: %d\nresolution: %s\n"
+		       "weight: %d\n",
 		       BYTES_TO_MB(type->low_gm_size),
 		       BYTES_TO_MB(type->high_gm_size),
-		       type->fence, vgpu_edid_str(type->resolution));
+		       type->fence, vgpu_edid_str(type->resolution),
+		       type->weight);
 }
 
 static MDEV_TYPE_ATTR_RO(available_instances);
@@ -1146,8 +1148,40 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
 	return 0;
 }
 
+static ssize_t
+vgpu_id_show(struct device *dev, struct device_attribute *attr,
+	     char *buf)
+{
+	struct mdev_device *mdev = mdev_from_dev(dev);
+
+	if (mdev) {
+		struct intel_vgpu *vgpu = (struct intel_vgpu *)
+			mdev_get_drvdata(mdev);
+		return sprintf(buf, "%d\n", vgpu->id);
+	}
+	return sprintf(buf, "\n");
+}
+
+static DEVICE_ATTR_RO(vgpu_id);
+
+static struct attribute *intel_vgpu_attrs[] = {
+	&dev_attr_vgpu_id.attr,
+	NULL
+};
+
+static const struct attribute_group intel_vgpu_group = {
+	.name = "intel_vgpu",
+	.attrs = intel_vgpu_attrs,
+};
+
+static const struct attribute_group *intel_vgpu_groups[] = {
+	&intel_vgpu_group,
+	NULL,
+};
+
 static const struct mdev_parent_ops intel_vgpu_ops = {
 	.supported_type_groups	= intel_vgpu_type_groups,
+	.mdev_attr_groups       = intel_vgpu_groups,
 	.create			= intel_vgpu_create,
 	.remove			= intel_vgpu_remove,
 
@@ -1339,13 +1373,6 @@ static int kvmgt_guest_init(struct mdev_device *mdev)
 
 static bool kvmgt_guest_exit(struct kvmgt_guest_info *info)
 {
-	struct intel_vgpu *vgpu = info->vgpu;
-
-	if (!info) {
-		gvt_vgpu_err("kvmgt_guest_info invalid\n");
-		return false;
-	}
-
 	kvm_page_track_unregister_notifier(info->kvm, &info->track_node);
 	kvmgt_protect_table_destroy(info);
 	gvt_cache_destroy(info->vgpu);

drivers/gpu/drm/i915/gvt/mmio.h

@@ -44,20 +44,21 @@ struct intel_vgpu;
 #define D_HSW   (1 << 2)
 #define D_BDW   (1 << 3)
 #define D_SKL	(1 << 4)
+#define D_KBL	(1 << 5)
 
-#define D_GEN9PLUS	(D_SKL)
-#define D_GEN8PLUS	(D_BDW | D_SKL)
-#define D_GEN75PLUS	(D_HSW | D_BDW | D_SKL)
-#define D_GEN7PLUS	(D_IVB | D_HSW | D_BDW | D_SKL)
+#define D_GEN9PLUS	(D_SKL | D_KBL)
+#define D_GEN8PLUS	(D_BDW | D_SKL | D_KBL)
+#define D_GEN75PLUS	(D_HSW | D_BDW | D_SKL | D_KBL)
+#define D_GEN7PLUS	(D_IVB | D_HSW | D_BDW | D_SKL | D_KBL)
 
-#define D_SKL_PLUS	(D_SKL)
-#define D_BDW_PLUS	(D_BDW | D_SKL)
-#define D_HSW_PLUS	(D_HSW | D_BDW | D_SKL)
-#define D_IVB_PLUS	(D_IVB | D_HSW | D_BDW | D_SKL)
+#define D_SKL_PLUS	(D_SKL | D_KBL)
+#define D_BDW_PLUS	(D_BDW | D_SKL | D_KBL)
+#define D_HSW_PLUS	(D_HSW | D_BDW | D_SKL | D_KBL)
+#define D_IVB_PLUS	(D_IVB | D_HSW | D_BDW | D_SKL | D_KBL)
 
 #define D_PRE_BDW	(D_SNB | D_IVB | D_HSW)
 #define D_PRE_SKL	(D_SNB | D_IVB | D_HSW | D_BDW)
-#define D_ALL		(D_SNB | D_IVB | D_HSW | D_BDW | D_SKL)
+#define D_ALL		(D_SNB | D_IVB | D_HSW | D_BDW | D_SKL | D_KBL)
 
 struct intel_gvt_mmio_info {
 	u32 offset;

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

@@ -126,6 +126,18 @@ static struct render_mmio gen9_render_mmio_list[] = {
 	{VCS2, _MMIO(0x1c028), 0xffff, false},
 
 	{VECS, _MMIO(0x1a028), 0xffff, false},
+
+	{RCS, _MMIO(0x7304), 0xffff, true},
+	{RCS, _MMIO(0x2248), 0x0, false},
+	{RCS, _MMIO(0x940c), 0x0, false},
+	{RCS, _MMIO(0x4ab8), 0x0, false},
+
+	{RCS, _MMIO(0x4ab0), 0x0, false},
+	{RCS, _MMIO(0x20d4), 0x0, false},
+
+	{RCS, _MMIO(0xb004), 0x0, false},
+	{RCS, _MMIO(0x20a0), 0x0, false},
+	{RCS, _MMIO(0x20e4), 0xffff, false},
 };
 
 static u32 gen9_render_mocs[I915_NUM_ENGINES][64];
@@ -159,7 +171,7 @@ static void handle_tlb_pending_event(struct intel_vgpu *vgpu, int ring_id)
 	 */
 	fw = intel_uncore_forcewake_for_reg(dev_priv, reg,
 					    FW_REG_READ | FW_REG_WRITE);
-	if (ring_id == RCS && IS_SKYLAKE(dev_priv))
+	if (ring_id == RCS && (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)))
 		fw |= FORCEWAKE_RENDER;
 
 	intel_uncore_forcewake_get(dev_priv, fw);
@@ -192,7 +204,7 @@ static void load_mocs(struct intel_vgpu *vgpu, int ring_id)
 	if (WARN_ON(ring_id >= ARRAY_SIZE(regs)))
 		return;
 
-	if (!IS_SKYLAKE(dev_priv))
+	if (!(IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)))
 		return;
 
 	offset.reg = regs[ring_id];
@@ -230,7 +242,7 @@ static void restore_mocs(struct intel_vgpu *vgpu, int ring_id)
 	if (WARN_ON(ring_id >= ARRAY_SIZE(regs)))
 		return;
 
-	if (!IS_SKYLAKE(dev_priv))
+	if (!(IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)))
 		return;
 
 	offset.reg = regs[ring_id];
@@ -265,7 +277,8 @@ void intel_gvt_load_render_mmio(struct intel_vgpu *vgpu, int ring_id)
 	u32 inhibit_mask =
 		_MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT);
 
-	if (IS_SKYLAKE(vgpu->gvt->dev_priv)) {
+	if (IS_SKYLAKE(vgpu->gvt->dev_priv)
+		|| IS_KABYLAKE(vgpu->gvt->dev_priv)) {
 		mmio = gen9_render_mmio_list;
 		array_size = ARRAY_SIZE(gen9_render_mmio_list);
 		load_mocs(vgpu, ring_id);
@@ -312,7 +325,7 @@ void intel_gvt_restore_render_mmio(struct intel_vgpu *vgpu, int ring_id)
 	u32 v;
 	int i, array_size;
 
-	if (IS_SKYLAKE(dev_priv)) {
+	if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
 		mmio = gen9_render_mmio_list;
 		array_size = ARRAY_SIZE(gen9_render_mmio_list);
 		restore_mocs(vgpu, ring_id);

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

@@ -47,11 +47,87 @@ static bool vgpu_has_pending_workload(struct intel_vgpu *vgpu)
 	return false;
 }
 
+struct vgpu_sched_data {
+	struct list_head lru_list;
+	struct intel_vgpu *vgpu;
+
+	ktime_t sched_in_time;
+	ktime_t sched_out_time;
+	ktime_t sched_time;
+	ktime_t left_ts;
+	ktime_t allocated_ts;
+
+	struct vgpu_sched_ctl sched_ctl;
+};
+
+struct gvt_sched_data {
+	struct intel_gvt *gvt;
+	struct hrtimer timer;
+	unsigned long period;
+	struct list_head lru_runq_head;
+};
+
+static void vgpu_update_timeslice(struct intel_vgpu *pre_vgpu)
+{
+	ktime_t delta_ts;
+	struct vgpu_sched_data *vgpu_data = pre_vgpu->sched_data;
+
+	delta_ts = vgpu_data->sched_out_time - vgpu_data->sched_in_time;
+
+	vgpu_data->sched_time += delta_ts;
+	vgpu_data->left_ts -= delta_ts;
+}
+
+#define GVT_TS_BALANCE_PERIOD_MS 100
+#define GVT_TS_BALANCE_STAGE_NUM 10
+
+static void gvt_balance_timeslice(struct gvt_sched_data *sched_data)
+{
+	struct vgpu_sched_data *vgpu_data;
+	struct list_head *pos;
+	static uint64_t stage_check;
+	int stage = stage_check++ % GVT_TS_BALANCE_STAGE_NUM;
+
+	/* The timeslice accumulation reset at stage 0, which is
+	 * allocated again without adding previous debt.
+	 */
+	if (stage == 0) {
+		int total_weight = 0;
+		ktime_t fair_timeslice;
+
+		list_for_each(pos, &sched_data->lru_runq_head) {
+			vgpu_data = container_of(pos, struct vgpu_sched_data, lru_list);
+			total_weight += vgpu_data->sched_ctl.weight;
+		}
+
+		list_for_each(pos, &sched_data->lru_runq_head) {
+			vgpu_data = container_of(pos, struct vgpu_sched_data, lru_list);
+			fair_timeslice = ms_to_ktime(GVT_TS_BALANCE_PERIOD_MS) *
+						vgpu_data->sched_ctl.weight /
+						total_weight;
+
+			vgpu_data->allocated_ts = fair_timeslice;
+			vgpu_data->left_ts = vgpu_data->allocated_ts;
+		}
+	} else {
+		list_for_each(pos, &sched_data->lru_runq_head) {
+			vgpu_data = container_of(pos, struct vgpu_sched_data, lru_list);
+
+			/* timeslice for next 100ms should add the left/debt
+			 * slice of previous stages.
+			 */
+			vgpu_data->left_ts += vgpu_data->allocated_ts;
+		}
+	}
+}
+
 static void try_to_schedule_next_vgpu(struct intel_gvt *gvt)
 {
 	struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
 	enum intel_engine_id i;
 	struct intel_engine_cs *engine;
+	struct vgpu_sched_data *vgpu_data;
+	ktime_t cur_time;
 
 	/* no target to schedule */
 	if (!scheduler->next_vgpu)
@@ -77,6 +153,15 @@ static void try_to_schedule_next_vgpu(struct intel_gvt *gvt)
 	gvt_dbg_sched("switch to next vgpu %d\n",
 			scheduler->next_vgpu->id);
 
+	cur_time = ktime_get();
+	if (scheduler->current_vgpu) {
+		vgpu_data = scheduler->current_vgpu->sched_data;
+		vgpu_data->sched_out_time = cur_time;
+		vgpu_update_timeslice(scheduler->current_vgpu);
+	}
+	vgpu_data = scheduler->next_vgpu->sched_data;
+	vgpu_data->sched_in_time = cur_time;
+
 	/* switch current vgpu */
 	scheduler->current_vgpu = scheduler->next_vgpu;
 	scheduler->next_vgpu = NULL;
@@ -88,62 +173,61 @@ static void try_to_schedule_next_vgpu(struct intel_gvt *gvt)
 		wake_up(&scheduler->waitq[i]);
 }
 
-struct tbs_vgpu_data {
-	struct list_head list;
-	struct intel_vgpu *vgpu;
-	/* put some per-vgpu sched stats here */
-};
-
-struct tbs_sched_data {
-	struct intel_gvt *gvt;
-	struct delayed_work work;
-	unsigned long period;
-	struct list_head runq_head;
-};
-
-#define GVT_DEFAULT_TIME_SLICE (msecs_to_jiffies(1))
-
-static void tbs_sched_func(struct work_struct *work)
+static struct intel_vgpu *find_busy_vgpu(struct gvt_sched_data *sched_data)
 {
-	struct tbs_sched_data *sched_data = container_of(work,
-			struct tbs_sched_data, work.work);
-	struct tbs_vgpu_data *vgpu_data;
-
-	struct intel_gvt *gvt = sched_data->gvt;
-	struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
-
+	struct vgpu_sched_data *vgpu_data;
 	struct intel_vgpu *vgpu = NULL;
-	struct list_head *pos, *head;
-
-	mutex_lock(&gvt->lock);
-
-	/* no vgpu or has already had a target */
-	if (list_empty(&sched_data->runq_head) || scheduler->next_vgpu)
-		goto out;
-
-	if (scheduler->current_vgpu) {
-		vgpu_data = scheduler->current_vgpu->sched_data;
-		head = &vgpu_data->list;
-	} else {
-		head = &sched_data->runq_head;
-	}
+	struct list_head *head = &sched_data->lru_runq_head;
+	struct list_head *pos;
 
 	/* search a vgpu with pending workload */
 	list_for_each(pos, head) {
-		if (pos == &sched_data->runq_head)
-			continue;
 
-		vgpu_data = container_of(pos, struct tbs_vgpu_data, list);
+		vgpu_data = container_of(pos, struct vgpu_sched_data, lru_list);
 		if (!vgpu_has_pending_workload(vgpu_data->vgpu))
 			continue;
 
+		/* Return the vGPU only if it has time slice left */
+		if (vgpu_data->left_ts > 0) {
 			vgpu = vgpu_data->vgpu;
 			break;
 		}
+	}
+
+	return vgpu;
+}
+
+/* in nanosecond */
+#define GVT_DEFAULT_TIME_SLICE 1000000
+
+static void tbs_sched_func(struct gvt_sched_data *sched_data)
+{
+	struct intel_gvt *gvt = sched_data->gvt;
+	struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
+	struct vgpu_sched_data *vgpu_data;
+	struct intel_vgpu *vgpu = NULL;
+	static uint64_t timer_check;
+
+	if (!(timer_check++ % GVT_TS_BALANCE_PERIOD_MS))
+		gvt_balance_timeslice(sched_data);
 
+	/* no active vgpu or has already had a target */
+	if (list_empty(&sched_data->lru_runq_head) || scheduler->next_vgpu)
+		goto out;
+
+	vgpu = find_busy_vgpu(sched_data);
 	if (vgpu) {
 		scheduler->next_vgpu = vgpu;
+
+		/* Move the last used vGPU to the tail of lru_list */
+		vgpu_data = vgpu->sched_data;
+		list_del_init(&vgpu_data->lru_list);
+		list_add_tail(&vgpu_data->lru_list,
+				&sched_data->lru_runq_head);
+
 		gvt_dbg_sched("pick next vgpu %d\n", vgpu->id);
+	} else {
+		scheduler->next_vgpu = gvt->idle_vgpu;
 	}
 out:
 	if (scheduler->next_vgpu) {
@@ -151,34 +235,49 @@ static void tbs_sched_func(struct work_struct *work)
 				scheduler->next_vgpu->id);
 		try_to_schedule_next_vgpu(gvt);
 	}
+}
 
-	/*
-	 * still have vgpu on runq
-	 * or last schedule haven't finished due to running workload
-	 */
-	if (!list_empty(&sched_data->runq_head) || scheduler->next_vgpu)
-		schedule_delayed_work(&sched_data->work, sched_data->period);
+void intel_gvt_schedule(struct intel_gvt *gvt)
+{
+	struct gvt_sched_data *sched_data = gvt->scheduler.sched_data;
 
+	mutex_lock(&gvt->lock);
+	tbs_sched_func(sched_data);
 	mutex_unlock(&gvt->lock);
 }
 
+static enum hrtimer_restart tbs_timer_fn(struct hrtimer *timer_data)
+{
+	struct gvt_sched_data *data;
+
+	data = container_of(timer_data, struct gvt_sched_data, timer);
+
+	intel_gvt_request_service(data->gvt, INTEL_GVT_REQUEST_SCHED);
+
+	hrtimer_add_expires_ns(&data->timer, data->period);
+
+	return HRTIMER_RESTART;
+}
+
 static int tbs_sched_init(struct intel_gvt *gvt)
 {
 	struct intel_gvt_workload_scheduler *scheduler =
 		&gvt->scheduler;
 
-	struct tbs_sched_data *data;
+	struct gvt_sched_data *data;
 
 	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
 
-	INIT_LIST_HEAD(&data->runq_head);
-	INIT_DELAYED_WORK(&data->work, tbs_sched_func);
+	INIT_LIST_HEAD(&data->lru_runq_head);
+	hrtimer_init(&data->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+	data->timer.function = tbs_timer_fn;
 	data->period = GVT_DEFAULT_TIME_SLICE;
 	data->gvt = gvt;
 
 	scheduler->sched_data = data;
+
 	return 0;
 }
 
@@ -186,25 +285,28 @@ static void tbs_sched_clean(struct intel_gvt *gvt)
 {
 	struct intel_gvt_workload_scheduler *scheduler =
 		&gvt->scheduler;
-	struct tbs_sched_data *data = scheduler->sched_data;
+	struct gvt_sched_data *data = scheduler->sched_data;
+
+	hrtimer_cancel(&data->timer);
 
-	cancel_delayed_work(&data->work);
 	kfree(data);
 	scheduler->sched_data = NULL;
 }
 
 static int tbs_sched_init_vgpu(struct intel_vgpu *vgpu)
 {
-	struct tbs_vgpu_data *data;
+	struct vgpu_sched_data *data;
 
 	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
 
+	data->sched_ctl.weight = vgpu->sched_ctl.weight;
 	data->vgpu = vgpu;
-	INIT_LIST_HEAD(&data->list);
+	INIT_LIST_HEAD(&data->lru_list);
 
 	vgpu->sched_data = data;
+
 	return 0;
 }
 
@@ -216,21 +318,24 @@ static void tbs_sched_clean_vgpu(struct intel_vgpu *vgpu)
 
 static void tbs_sched_start_schedule(struct intel_vgpu *vgpu)
 {
-	struct tbs_sched_data *sched_data = vgpu->gvt->scheduler.sched_data;
-	struct tbs_vgpu_data *vgpu_data = vgpu->sched_data;
+	struct gvt_sched_data *sched_data = vgpu->gvt->scheduler.sched_data;
+	struct vgpu_sched_data *vgpu_data = vgpu->sched_data;
 
-	if (!list_empty(&vgpu_data->list))
+	if (!list_empty(&vgpu_data->lru_list))
 		return;
 
-	list_add_tail(&vgpu_data->list, &sched_data->runq_head);
-	schedule_delayed_work(&sched_data->work, 0);
+	list_add_tail(&vgpu_data->lru_list, &sched_data->lru_runq_head);
+
+	if (!hrtimer_active(&sched_data->timer))
+		hrtimer_start(&sched_data->timer, ktime_add_ns(ktime_get(),
+			sched_data->period), HRTIMER_MODE_ABS);
 }
 
 static void tbs_sched_stop_schedule(struct intel_vgpu *vgpu)
 {
-	struct tbs_vgpu_data *vgpu_data = vgpu->sched_data;
+	struct vgpu_sched_data *vgpu_data = vgpu->sched_data;
 
-	list_del_init(&vgpu_data->list);
+	list_del_init(&vgpu_data->lru_list);
 }
 
 static struct intel_gvt_sched_policy_ops tbs_schedule_ops = {

drivers/gpu/drm/i915/gvt/sched_policy.h

@@ -43,6 +43,8 @@ struct intel_gvt_sched_policy_ops {
 	void (*stop_schedule)(struct intel_vgpu *vgpu);
 };
 
+void intel_gvt_schedule(struct intel_gvt *gvt);
+
 int intel_gvt_init_sched_policy(struct intel_gvt *gvt);
 
 void intel_gvt_clean_sched_policy(struct intel_gvt *gvt);

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

@@ -448,7 +448,8 @@ static int workload_thread(void *priv)
 	struct intel_vgpu_workload *workload = NULL;
 	struct intel_vgpu *vgpu = NULL;
 	int ret;
-	bool need_force_wake = IS_SKYLAKE(gvt->dev_priv);
+	bool need_force_wake = IS_SKYLAKE(gvt->dev_priv)
+			|| IS_KABYLAKE(gvt->dev_priv);
 	DEFINE_WAIT_FUNC(wait, woken_wake_function);
 
 	kfree(p);

drivers/gpu/drm/i915/gvt/scheduler.h

@@ -67,7 +67,6 @@ struct shadow_per_ctx {
 };
 
 struct intel_shadow_wa_ctx {
-	struct intel_vgpu_workload *workload;
 	struct shadow_indirect_ctx indirect_ctx;
 	struct shadow_per_ctx per_ctx;
 

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

@@ -64,18 +64,28 @@ void populate_pvinfo_page(struct intel_vgpu *vgpu)
 	WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
 }
 
+#define VGPU_MAX_WEIGHT 16
+#define VGPU_WEIGHT(vgpu_num)	\
+	(VGPU_MAX_WEIGHT / (vgpu_num))
+
 static struct {
 	unsigned int low_mm;
 	unsigned int high_mm;
 	unsigned int fence;
+
+	/* A vGPU with a weight of 8 will get twice as much GPU as a vGPU
+	 * with a weight of 4 on a contended host, different vGPU type has
+	 * different weight set. Legal weights range from 1 to 16.
+	 */
+	unsigned int weight;
 	enum intel_vgpu_edid edid;
 	char *name;
 } vgpu_types[] = {
 /* Fixed vGPU type table */
-	{ MB_TO_BYTES(64), MB_TO_BYTES(512), 4, GVT_EDID_1024_768, "8" },
-	{ MB_TO_BYTES(128), MB_TO_BYTES(512), 4, GVT_EDID_1920_1200, "4" },
-	{ MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, GVT_EDID_1920_1200, "2" },
-	{ MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, GVT_EDID_1920_1200, "1" },
+	{ MB_TO_BYTES(64), MB_TO_BYTES(384), 4, VGPU_WEIGHT(8), GVT_EDID_1024_768, "8" },
+	{ MB_TO_BYTES(128), MB_TO_BYTES(512), 4, VGPU_WEIGHT(4), GVT_EDID_1920_1200, "4" },
+	{ MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, VGPU_WEIGHT(2), GVT_EDID_1920_1200, "2" },
+	{ MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, VGPU_WEIGHT(1), GVT_EDID_1920_1200, "1" },
 };
 
 /**
@@ -120,6 +130,12 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
 		gvt->types[i].low_gm_size = vgpu_types[i].low_mm;
 		gvt->types[i].high_gm_size = vgpu_types[i].high_mm;
 		gvt->types[i].fence = vgpu_types[i].fence;
+
+		if (vgpu_types[i].weight < 1 ||
+					vgpu_types[i].weight > VGPU_MAX_WEIGHT)
+			return -EINVAL;
+
+		gvt->types[i].weight = vgpu_types[i].weight;
 		gvt->types[i].resolution = vgpu_types[i].edid;
 		gvt->types[i].avail_instance = min(low_avail / vgpu_types[i].low_mm,
 						   high_avail / vgpu_types[i].high_mm);
@@ -131,11 +147,12 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
 			sprintf(gvt->types[i].name, "GVTg_V5_%s",
 						vgpu_types[i].name);
 
-		gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u res %s\n",
+		gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u weight %u res %s\n",
 			     i, gvt->types[i].name,
 			     gvt->types[i].avail_instance,
 			     gvt->types[i].low_gm_size,
 			     gvt->types[i].high_gm_size, gvt->types[i].fence,
+			     gvt->types[i].weight,
 			     vgpu_edid_str(gvt->types[i].resolution));
 	}
 
@@ -216,6 +233,59 @@ void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
 	mutex_unlock(&gvt->lock);
 }
 
+#define IDLE_VGPU_IDR 0
+
+/**
+ * intel_gvt_create_idle_vgpu - create an idle virtual GPU
+ * @gvt: GVT device
+ *
+ * This function is called when user wants to create an idle virtual GPU.
+ *
+ * Returns:
+ * pointer to intel_vgpu, error pointer if failed.
+ */
+struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt)
+{
+	struct intel_vgpu *vgpu;
+	enum intel_engine_id i;
+	int ret;
+
+	vgpu = vzalloc(sizeof(*vgpu));
+	if (!vgpu)
+		return ERR_PTR(-ENOMEM);
+
+	vgpu->id = IDLE_VGPU_IDR;
+	vgpu->gvt = gvt;
+
+	for (i = 0; i < I915_NUM_ENGINES; i++)
+		INIT_LIST_HEAD(&vgpu->workload_q_head[i]);
+
+	ret = intel_vgpu_init_sched_policy(vgpu);
+	if (ret)
+		goto out_free_vgpu;
+
+	vgpu->active = false;
+
+	return vgpu;
+
+out_free_vgpu:
+	vfree(vgpu);
+	return ERR_PTR(ret);
+}
+
+/**
+ * intel_gvt_destroy_vgpu - destroy an idle virtual GPU
+ * @vgpu: virtual GPU
+ *
+ * This function is called when user wants to destroy an idle virtual GPU.
+ *
+ */
+void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu)
+{
+	intel_vgpu_clean_sched_policy(vgpu);
+	vfree(vgpu);
+}
+
 static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
 		struct intel_vgpu_creation_params *param)
 {
@@ -232,13 +302,15 @@ static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
 
 	mutex_lock(&gvt->lock);
 
-	ret = idr_alloc(&gvt->vgpu_idr, vgpu, 1, GVT_MAX_VGPU, GFP_KERNEL);
+	ret = idr_alloc(&gvt->vgpu_idr, vgpu, IDLE_VGPU_IDR + 1, GVT_MAX_VGPU,
+		GFP_KERNEL);
 	if (ret < 0)
 		goto out_free_vgpu;
 
 	vgpu->id = ret;
 	vgpu->handle = param->handle;
 	vgpu->gvt = gvt;
+	vgpu->sched_ctl.weight = param->weight;
 	bitmap_zero(vgpu->tlb_handle_pending, I915_NUM_ENGINES);
 
 	intel_vgpu_init_cfg_space(vgpu, param->primary);
@@ -325,6 +397,7 @@ struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
 	param.low_gm_sz = type->low_gm_size;
 	param.high_gm_sz = type->high_gm_size;
 	param.fence_sz = type->fence;
+	param.weight = type->weight;
 	param.resolution = type->resolution;
 
 	/* XXX current param based on MB */

drivers/gpu/drm/i915/intel_gvt.c

@@ -45,6 +45,8 @@ static bool is_supported_device(struct drm_i915_private *dev_priv)
 		return true;
 	if (IS_SKYLAKE(dev_priv))
 		return true;
+	if (IS_KABYLAKE(dev_priv) && INTEL_DEVID(dev_priv) == 0x591D)
+		return true;
 	return false;
 }