[PATCH v6 0/3] Change KVMGT into self loadable module

[PATCH v6 0/3] Change KVMGT into self loadable module

[Zhenyu Wang]

This series try to change 'kvmgt' as self loadable module to enable
GVT feature for VFIO/mdev interface when user loads 'kvmgt' module,
instead of current method to load hypervisor module when i915/gvt
device model initializes.

Resend whole series for QA's jekins job.

v6:
- remove unused variable

Zhenyu Wang (3):
  drm/i915/gvt: mandatory require hypervisor's host_init
  drm/i915/gvt: remove unused parameter for hypervisor's host_exit call
  drm/i915/gvt: Change KVMGT as self load module

 drivers/gpu/drm/i915/Makefile        |   1 +
 drivers/gpu/drm/i915/gvt/Makefile    |   1 -
 drivers/gpu/drm/i915/gvt/gvt.c       | 108 +++++++++++----------------
 drivers/gpu/drm/i915/gvt/gvt.h       |   6 +-
 drivers/gpu/drm/i915/gvt/hypercall.h |   9 ++-
 drivers/gpu/drm/i915/gvt/kvmgt.c     |  18 ++++-
 drivers/gpu/drm/i915/gvt/mpt.h       |  13 ++--
 drivers/gpu/drm/i915/intel_gvt.c     |   9 ---
 8 files changed, 75 insertions(+), 90 deletions(-)

-- 
2.19.1

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[PATCH v6 1/3] drm/i915/gvt: mandatory require hypervisor's host_init

[Zhenyu Wang]

Don't mark hypervisor module's host_init as optional,
but mandatory required.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
---
 drivers/gpu/drm/i915/gvt/mpt.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/mpt.h b/drivers/gpu/drm/i915/gvt/mpt.h
index 67f19992b226..ce721099a020 100644
--- a/drivers/gpu/drm/i915/gvt/mpt.h
+++ b/drivers/gpu/drm/i915/gvt/mpt.h
@@ -50,11 +50,10 @@
  * Zero on success, negative error code if failed
  */
 static inline int intel_gvt_hypervisor_host_init(struct device *dev,
-			void *gvt, const void *ops)
+						 void *gvt, const void *ops)
 {
-	/* optional to provide */
 	if (!intel_gvt_host.mpt->host_init)
-		return 0;
+		return -ENODEV;
 
 	return intel_gvt_host.mpt->host_init(dev, gvt, ops);
 }
-- 
2.19.1

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[PATCH v6 2/3] drm/i915/gvt: remove unused parameter for hypervisor's host_exit call

[Zhenyu Wang]

The parameter 'void *gvt' is not used and required for hypervisor's
exit call. Even for non-merged Xen hypervisor support. So just remove it.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
---
 drivers/gpu/drm/i915/gvt/gvt.c       | 2 +-
 drivers/gpu/drm/i915/gvt/hypercall.h | 2 +-
 drivers/gpu/drm/i915/gvt/kvmgt.c     | 2 +-
 drivers/gpu/drm/i915/gvt/mpt.h       | 5 ++---
 4 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c
index 733a2a0d0c30..a5b760b7bc10 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.c
+++ b/drivers/gpu/drm/i915/gvt/gvt.c
@@ -316,7 +316,7 @@ void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
 		return;
 
 	intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
-	intel_gvt_hypervisor_host_exit(&dev_priv->drm.pdev->dev, gvt);
+	intel_gvt_hypervisor_host_exit(&dev_priv->drm.pdev->dev);
 	intel_gvt_cleanup_vgpu_type_groups(gvt);
 	intel_gvt_clean_vgpu_types(gvt);
 
diff --git a/drivers/gpu/drm/i915/gvt/hypercall.h b/drivers/gpu/drm/i915/gvt/hypercall.h
index 5af11cf1b482..e49a9247ed78 100644
--- a/drivers/gpu/drm/i915/gvt/hypercall.h
+++ b/drivers/gpu/drm/i915/gvt/hypercall.h
@@ -39,7 +39,7 @@
  */
 struct intel_gvt_mpt {
 	int (*host_init)(struct device *dev, void *gvt, const void *ops);
-	void (*host_exit)(struct device *dev, void *gvt);
+	void (*host_exit)(struct device *dev);
 	int (*attach_vgpu)(void *vgpu, unsigned long *handle);
 	void (*detach_vgpu)(unsigned long handle);
 	int (*inject_msi)(unsigned long handle, u32 addr, u16 data);
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index c1072143da1d..1bbd04d30c42 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1467,7 +1467,7 @@ static int kvmgt_host_init(struct device *dev, void *gvt, const void *ops)
 	return mdev_register_device(dev, &intel_vgpu_ops);
 }
 
-static void kvmgt_host_exit(struct device *dev, void *gvt)
+static void kvmgt_host_exit(struct device *dev)
 {
 	mdev_unregister_device(dev);
 }
diff --git a/drivers/gpu/drm/i915/gvt/mpt.h b/drivers/gpu/drm/i915/gvt/mpt.h
index ce721099a020..c95ef77da62c 100644
--- a/drivers/gpu/drm/i915/gvt/mpt.h
+++ b/drivers/gpu/drm/i915/gvt/mpt.h
@@ -61,14 +61,13 @@ static inline int intel_gvt_hypervisor_host_init(struct device *dev,
 /**
  * intel_gvt_hypervisor_host_exit - exit GVT-g host side
  */
-static inline void intel_gvt_hypervisor_host_exit(struct device *dev,
-			void *gvt)
+static inline void intel_gvt_hypervisor_host_exit(struct device *dev)
 {
 	/* optional to provide */
 	if (!intel_gvt_host.mpt->host_exit)
 		return;
 
-	intel_gvt_host.mpt->host_exit(dev, gvt);
+	intel_gvt_host.mpt->host_exit(dev);
 }
 
 /**
-- 
2.19.1

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[PATCH v6 3/3] drm/i915/gvt: Change KVMGT as self load module

[Zhenyu Wang]

This trys to make 'kvmgt' module as self loadable instead of loading
by i915/gvt device model. So hypervisor specific module could be
stand-alone, e.g only after loading hypervisor specific module, GVT
feature could be enabled via specific hypervisor interface, e.g VFIO/mdev.

So this trys to use hypervisor module register/unregister interface
for that. Hypervisor module needs to take care of module reference
itself when working for hypervisor interface, e.g for VFIO/mdev,
hypervisor module would reference counting mdev when open and release.

This makes 'kvmgt' module really split from GVT device model. User
needs to load 'kvmgt' to enable VFIO/mdev interface.

v6:
- remove unused variable

v5:
- put module reference in register error path

v4:
- fix checkpatch warning

v3:
- Fix module reference handling for device open and release. Unused
  mdev devices would be cleaned up in device unregister when module unload.

v2:
- Fix kvmgt order after i915 for built-in case

Cc: "Yuan, Hang" <hang.yuan@intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: "He, Min" <min.he@intel.com>
Reviewed-by: Yuan, Hang <hang.yuan@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
---
 drivers/gpu/drm/i915/Makefile        |   1 +
 drivers/gpu/drm/i915/gvt/Makefile    |   1 -
 drivers/gpu/drm/i915/gvt/gvt.c       | 108 +++++++++++----------------
 drivers/gpu/drm/i915/gvt/gvt.h       |   6 +-
 drivers/gpu/drm/i915/gvt/hypercall.h |   7 +-
 drivers/gpu/drm/i915/gvt/kvmgt.c     |  16 +++-
 drivers/gpu/drm/i915/gvt/mpt.h       |   3 +
 drivers/gpu/drm/i915/intel_gvt.c     |   9 ---
 8 files changed, 69 insertions(+), 82 deletions(-)

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 0ff878c994e2..ae0d975a6f34 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -195,3 +195,4 @@ endif
 i915-y += intel_lpe_audio.o
 
 obj-$(CONFIG_DRM_I915) += i915.o
+obj-$(CONFIG_DRM_I915_GVT_KVMGT) += gvt/kvmgt.o
diff --git a/drivers/gpu/drm/i915/gvt/Makefile b/drivers/gpu/drm/i915/gvt/Makefile
index b016dc753db9..271fb46d4dd0 100644
--- a/drivers/gpu/drm/i915/gvt/Makefile
+++ b/drivers/gpu/drm/i915/gvt/Makefile
@@ -7,4 +7,3 @@ GVT_SOURCE := gvt.o aperture_gm.o handlers.o vgpu.o trace_points.o firmware.o \
 
 ccflags-y				+= -I$(src) -I$(src)/$(GVT_DIR)
 i915-y					+= $(addprefix $(GVT_DIR)/, $(GVT_SOURCE))
-obj-$(CONFIG_DRM_I915_GVT_KVMGT)	+= $(GVT_DIR)/kvmgt.o
diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c
index a5b760b7bc10..4e8947f33bd0 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.c
+++ b/drivers/gpu/drm/i915/gvt/gvt.c
@@ -187,52 +187,6 @@ static const struct intel_gvt_ops intel_gvt_ops = {
 	.write_protect_handler = intel_vgpu_page_track_handler,
 };
 
-/**
- * intel_gvt_init_host - Load MPT modules and detect if we're running in host
- *
- * This function is called at the driver loading stage. If failed to find a
- * loadable MPT module or detect currently we're running in a VM, then GVT-g
- * will be disabled
- *
- * Returns:
- * Zero on success, negative error code if failed.
- *
- */
-int intel_gvt_init_host(void)
-{
-	if (intel_gvt_host.initialized)
-		return 0;
-
-	/* Xen DOM U */
-	if (xen_domain() && !xen_initial_domain())
-		return -ENODEV;
-
-	/* Try to load MPT modules for hypervisors */
-	if (xen_initial_domain()) {
-		/* In Xen dom0 */
-		intel_gvt_host.mpt = try_then_request_module(
-				symbol_get(xengt_mpt), "xengt");
-		intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_XEN;
-	} else {
-#if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)
-		/* not in Xen. Try KVMGT */
-		intel_gvt_host.mpt = try_then_request_module(
-				symbol_get(kvmgt_mpt), "kvmgt");
-		intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_KVM;
-#endif
-	}
-
-	/* Fail to load MPT modules - bail out */
-	if (!intel_gvt_host.mpt)
-		return -EINVAL;
-
-	gvt_dbg_core("Running with hypervisor %s in host mode\n",
-			supported_hypervisors[intel_gvt_host.hypervisor_type]);
-
-	intel_gvt_host.initialized = true;
-	return 0;
-}
-
 static void init_device_info(struct intel_gvt *gvt)
 {
 	struct intel_gvt_device_info *info = &gvt->device_info;
@@ -316,7 +270,6 @@ void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
 		return;
 
 	intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
-	intel_gvt_hypervisor_host_exit(&dev_priv->drm.pdev->dev);
 	intel_gvt_cleanup_vgpu_type_groups(gvt);
 	intel_gvt_clean_vgpu_types(gvt);
 
@@ -352,13 +305,6 @@ int intel_gvt_init_device(struct drm_i915_private *dev_priv)
 	struct intel_vgpu *vgpu;
 	int ret;
 
-	/*
-	 * Cannot initialize GVT device without intel_gvt_host gets
-	 * initialized first.
-	 */
-	if (WARN_ON(!intel_gvt_host.initialized))
-		return -EINVAL;
-
 	if (WARN_ON(dev_priv->gvt))
 		return -EEXIST;
 
@@ -420,13 +366,6 @@ int intel_gvt_init_device(struct drm_i915_private *dev_priv)
 		goto out_clean_types;
 	}
 
-	ret = intel_gvt_hypervisor_host_init(&dev_priv->drm.pdev->dev, gvt,
-				&intel_gvt_ops);
-	if (ret) {
-		gvt_err("failed to register gvt-g host device: %d\n", ret);
-		goto out_clean_types;
-	}
-
 	vgpu = intel_gvt_create_idle_vgpu(gvt);
 	if (IS_ERR(vgpu)) {
 		ret = PTR_ERR(vgpu);
@@ -441,6 +380,8 @@ int intel_gvt_init_device(struct drm_i915_private *dev_priv)
 
 	gvt_dbg_core("gvt device initialization is done\n");
 	dev_priv->gvt = gvt;
+	intel_gvt_host.dev = &dev_priv->drm.pdev->dev;
+	intel_gvt_host.initialized = true;
 	return 0;
 
 out_clean_types:
@@ -467,6 +408,45 @@ int intel_gvt_init_device(struct drm_i915_private *dev_priv)
 	return ret;
 }
 
-#if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)
-MODULE_SOFTDEP("pre: kvmgt");
-#endif
+int
+intel_gvt_register_hypervisor(struct intel_gvt_mpt *m)
+{
+	int ret;
+	void *gvt;
+
+	if (!intel_gvt_host.initialized)
+		return -ENODEV;
+
+	if (m->type != INTEL_GVT_HYPERVISOR_KVM &&
+	    m->type != INTEL_GVT_HYPERVISOR_XEN)
+		return -EINVAL;
+
+	/* Get a reference for device model module */
+	if (!try_module_get(THIS_MODULE))
+		return -ENODEV;
+
+	intel_gvt_host.mpt = m;
+	intel_gvt_host.hypervisor_type = m->type;
+	gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
+
+	ret = intel_gvt_hypervisor_host_init(intel_gvt_host.dev, gvt,
+					     &intel_gvt_ops);
+	if (ret < 0) {
+		gvt_err("Failed to init %s hypervisor module\n",
+			supported_hypervisors[intel_gvt_host.hypervisor_type]);
+		module_put(THIS_MODULE);
+		return -ENODEV;
+	}
+	gvt_dbg_core("Running with hypervisor %s in host mode\n",
+		     supported_hypervisors[intel_gvt_host.hypervisor_type]);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(intel_gvt_register_hypervisor);
+
+void
+intel_gvt_unregister_hypervisor(void)
+{
+	intel_gvt_hypervisor_host_exit(intel_gvt_host.dev);
+	module_put(THIS_MODULE);
+}
+EXPORT_SYMBOL_GPL(intel_gvt_unregister_hypervisor);
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index b4ab1dad0143..8a4cf995d755 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -52,12 +52,8 @@
 
 #define GVT_MAX_VGPU 8
 
-enum {
-	INTEL_GVT_HYPERVISOR_XEN = 0,
-	INTEL_GVT_HYPERVISOR_KVM,
-};
-
 struct intel_gvt_host {
+	struct device *dev;
 	bool initialized;
 	int hypervisor_type;
 	struct intel_gvt_mpt *mpt;
diff --git a/drivers/gpu/drm/i915/gvt/hypercall.h b/drivers/gpu/drm/i915/gvt/hypercall.h
index e49a9247ed78..50798868ab15 100644
--- a/drivers/gpu/drm/i915/gvt/hypercall.h
+++ b/drivers/gpu/drm/i915/gvt/hypercall.h
@@ -33,11 +33,17 @@
 #ifndef _GVT_HYPERCALL_H_
 #define _GVT_HYPERCALL_H_
 
+enum hypervisor_type {
+	INTEL_GVT_HYPERVISOR_XEN = 0,
+	INTEL_GVT_HYPERVISOR_KVM,
+};
+
 /*
  * Specific GVT-g MPT modules function collections. Currently GVT-g supports
  * both Xen and KVM by providing dedicated hypervisor-related MPT modules.
  */
 struct intel_gvt_mpt {
+	enum hypervisor_type type;
 	int (*host_init)(struct device *dev, void *gvt, const void *ops);
 	void (*host_exit)(struct device *dev);
 	int (*attach_vgpu)(void *vgpu, unsigned long *handle);
@@ -67,6 +73,5 @@ struct intel_gvt_mpt {
 };
 
 extern struct intel_gvt_mpt xengt_mpt;
-extern struct intel_gvt_mpt kvmgt_mpt;
 
 #endif /* _GVT_HYPERCALL_H_ */
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 1bbd04d30c42..a19e684e621a 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -627,6 +627,12 @@ static int intel_vgpu_open(struct mdev_device *mdev)
 		goto undo_iommu;
 	}
 
+	/* Take a module reference as mdev core doesn't take
+	 * a reference for vendor driver.
+	 */
+	if (!try_module_get(THIS_MODULE))
+		goto undo_group;
+
 	ret = kvmgt_guest_init(mdev);
 	if (ret)
 		goto undo_group;
@@ -679,6 +685,9 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu)
 					&vgpu->vdev.group_notifier);
 	WARN(ret, "vfio_unregister_notifier for group failed: %d\n", ret);
 
+	/* dereference module reference taken at open */
+	module_put(THIS_MODULE);
+
 	info = (struct kvmgt_guest_info *)vgpu->handle;
 	kvmgt_guest_exit(info);
 
@@ -1849,7 +1858,8 @@ static bool kvmgt_is_valid_gfn(unsigned long handle, unsigned long gfn)
 	return ret;
 }
 
-struct intel_gvt_mpt kvmgt_mpt = {
+static struct intel_gvt_mpt kvmgt_mpt = {
+	.type = INTEL_GVT_HYPERVISOR_KVM,
 	.host_init = kvmgt_host_init,
 	.host_exit = kvmgt_host_exit,
 	.attach_vgpu = kvmgt_attach_vgpu,
@@ -1868,15 +1878,17 @@ struct intel_gvt_mpt kvmgt_mpt = {
 	.put_vfio_device = kvmgt_put_vfio_device,
 	.is_valid_gfn = kvmgt_is_valid_gfn,
 };
-EXPORT_SYMBOL_GPL(kvmgt_mpt);
 
 static int __init kvmgt_init(void)
 {
+	if (intel_gvt_register_hypervisor(&kvmgt_mpt) < 0)
+		return -ENODEV;
 	return 0;
 }
 
 static void __exit kvmgt_exit(void)
 {
+	intel_gvt_unregister_hypervisor();
 }
 
 module_init(kvmgt_init);
diff --git a/drivers/gpu/drm/i915/gvt/mpt.h b/drivers/gpu/drm/i915/gvt/mpt.h
index c95ef77da62c..9b4225d44243 100644
--- a/drivers/gpu/drm/i915/gvt/mpt.h
+++ b/drivers/gpu/drm/i915/gvt/mpt.h
@@ -360,4 +360,7 @@ static inline bool intel_gvt_hypervisor_is_valid_gfn(
 	return intel_gvt_host.mpt->is_valid_gfn(vgpu->handle, gfn);
 }
 
+int intel_gvt_register_hypervisor(struct intel_gvt_mpt *);
+void intel_gvt_unregister_hypervisor(void);
+
 #endif /* _GVT_MPT_H_ */
diff --git a/drivers/gpu/drm/i915/intel_gvt.c b/drivers/gpu/drm/i915/intel_gvt.c
index c22b3e18a0f5..d74e59e22c9d 100644
--- a/drivers/gpu/drm/i915/intel_gvt.c
+++ b/drivers/gpu/drm/i915/intel_gvt.c
@@ -105,15 +105,6 @@ int intel_gvt_init(struct drm_i915_private *dev_priv)
 		return -EIO;
 	}
 
-	/*
-	 * We're not in host or fail to find a MPT module, disable GVT-g
-	 */
-	ret = intel_gvt_init_host();
-	if (ret) {
-		DRM_DEBUG_DRIVER("Not in host or MPT modules not found\n");
-		goto bail;
-	}
-
 	ret = intel_gvt_init_device(dev_priv);
 	if (ret) {
 		DRM_DEBUG_DRIVER("Fail to init GVT device\n");
-- 
2.19.1

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✓ Fi.CI.BAT: success for Change KVMGT into self loadable module (rev4)

[Patchwork]

== Series Details ==

Series: Change KVMGT into self loadable module (rev4)
URL   : https://patchwork.freedesktop.org/series/53379/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_5280 -> Patchwork_11043
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://patchwork.freedesktop.org/api/1.0/series/53379/revisions/4/mbox/

Known issues
------------

  Here are the changes found in Patchwork_11043 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_ctx_create@basic-files:
    - fi-bsw-kefka:       PASS -> FAIL [fdo#108656]

  * igt@gem_exec_suspend@basic-s3:
    - fi-blb-e6850:       PASS -> INCOMPLETE [fdo#107718]

  
  [fdo#107718]: https://bugs.freedesktop.org/show_bug.cgi?id=107718
  [fdo#108656]: https://bugs.freedesktop.org/show_bug.cgi?id=108656


Participating hosts (45 -> 42)
------------------------------

  Additional (2): fi-skl-guc fi-skl-6600u 
  Missing    (5): fi-ilk-m540 fi-hsw-4200u fi-byt-squawks fi-bsw-cyan fi-icl-y 


Build changes
-------------

    * Linux: CI_DRM_5280 -> Patchwork_11043

  CI_DRM_5280: 6047933c2fafdfd42353d735b213e74826d5a939 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_4743: edb2db2cf2b6665d7ba3fa9117263302f6307a4f @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_11043: 4517d0efeed2dfbf726017b688f12a5ba479e6ec @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

4517d0efeed2 drm/i915/gvt: Change KVMGT as self load module
c9a054b04171 drm/i915/gvt: remove unused parameter for hypervisor's host_exit call
ebe9b6bbbd81 drm/i915/gvt: mandatory require hypervisor's host_init

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_11043/
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✓ Fi.CI.IGT: success for Change KVMGT into self loadable module (rev4)

[Patchwork]

== Series Details ==

Series: Change KVMGT into self loadable module (rev4)
URL   : https://patchwork.freedesktop.org/series/53379/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_5280_full -> Patchwork_11043_full
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  

Known issues
------------

  Here are the changes found in Patchwork_11043_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_exec_schedule@pi-ringfull-render:
    - shard-glk:          NOTRUN -> FAIL [fdo#103158]

  * {igt@kms_plane@pixel-format-pipe-b-planes-source-clamping}:
    - shard-glk:          PASS -> FAIL [fdo#108948]

  * igt@kms_plane@plane-position-covered-pipe-c-planes:
    - shard-glk:          PASS -> FAIL [fdo#103166]

  * igt@kms_plane_multiple@atomic-pipe-a-tiling-y:
    - shard-apl:          PASS -> FAIL [fdo#103166]

  * {igt@kms_rotation_crc@multiplane-rotation-cropping-top}:
    - shard-kbl:          PASS -> DMESG-WARN [fdo#105604]
    - shard-glk:          PASS -> DMESG-WARN [fdo#105763] / [fdo#106538]

  * igt@kms_setmode@basic:
    - shard-apl:          PASS -> FAIL [fdo#99912]

  
#### Possible fixes ####

  * igt@kms_busy@basic-modeset-a:
    - shard-apl:          DMESG-WARN [fdo#103558] / [fdo#105602] -> PASS +9

  * igt@kms_busy@extended-modeset-hang-newfb-render-b:
    - shard-kbl:          DMESG-WARN [fdo#107956] -> PASS

  * igt@kms_cursor_crc@cursor-128x128-sliding:
    - shard-apl:          FAIL [fdo#103232] -> PASS +2

  * igt@kms_cursor_crc@cursor-256x256-dpms:
    - shard-glk:          FAIL [fdo#103232] -> PASS

  * igt@kms_cursor_crc@cursor-64x64-suspend:
    - shard-apl:          FAIL [fdo#103191] / [fdo#103232] -> PASS

  * igt@kms_flip@2x-flip-vs-expired-vblank-interruptible:
    - shard-glk:          FAIL [fdo#105363] -> PASS

  * igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-indfb-draw-mmap-cpu:
    - shard-glk:          FAIL [fdo#103167] -> PASS +1

  * igt@kms_frontbuffer_tracking@fbc-1p-primscrn-spr-indfb-draw-render:
    - shard-apl:          FAIL [fdo#103167] -> PASS

  * igt@kms_plane@pixel-format-pipe-c-planes:
    - shard-glk:          FAIL [fdo#103166] -> PASS +1

  * igt@kms_plane_multiple@atomic-pipe-a-tiling-yf:
    - shard-apl:          FAIL [fdo#103166] -> PASS

  
#### Warnings ####

  * igt@kms_content_protection@legacy:
    - shard-apl:          FAIL [fdo#108597] -> INCOMPLETE [fdo#103927]

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#103158]: https://bugs.freedesktop.org/show_bug.cgi?id=103158
  [fdo#103166]: https://bugs.freedesktop.org/show_bug.cgi?id=103166
  [fdo#103167]: https://bugs.freedesktop.org/show_bug.cgi?id=103167
  [fdo#103191]: https://bugs.freedesktop.org/show_bug.cgi?id=103191
  [fdo#103232]: https://bugs.freedesktop.org/show_bug.cgi?id=103232
  [fdo#103558]: https://bugs.freedesktop.org/show_bug.cgi?id=103558
  [fdo#103927]: https://bugs.freedesktop.org/show_bug.cgi?id=103927
  [fdo#105363]: https://bugs.freedesktop.org/show_bug.cgi?id=105363
  [fdo#105602]: https://bugs.freedesktop.org/show_bug.cgi?id=105602
  [fdo#105604]: https://bugs.freedesktop.org/show_bug.cgi?id=105604
  [fdo#105763]: https://bugs.freedesktop.org/show_bug.cgi?id=105763
  [fdo#106538]: https://bugs.freedesktop.org/show_bug.cgi?id=106538
  [fdo#107956]: https://bugs.freedesktop.org/show_bug.cgi?id=107956
  [fdo#108597]: https://bugs.freedesktop.org/show_bug.cgi?id=108597
  [fdo#108948]: https://bugs.freedesktop.org/show_bug.cgi?id=108948
  [fdo#99912]: https://bugs.freedesktop.org/show_bug.cgi?id=99912


Participating hosts (7 -> 5)
------------------------------

  Missing    (2): shard-skl shard-iclb 


Build changes
-------------

    * Linux: CI_DRM_5280 -> Patchwork_11043

  CI_DRM_5280: 6047933c2fafdfd42353d735b213e74826d5a939 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_4743: edb2db2cf2b6665d7ba3fa9117263302f6307a4f @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_11043: 4517d0efeed2dfbf726017b688f12a5ba479e6ec @ git://anongit.freedesktop.org/gfx-ci/linux
  piglit_4509: fdc5a4ca11124ab8413c7988896eec4c97336694 @ git://anongit.freedesktop.org/piglit

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_11043/
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Re: [PATCH v6 3/3] drm/i915/gvt: Change KVMGT as self load module

[Joonas Lahtinen]

Quoting Zhenyu Wang (2018-12-07 10:16:53)
> This trys to make 'kvmgt' module as self loadable instead of loading
> by i915/gvt device model. So hypervisor specific module could be
> stand-alone, e.g only after loading hypervisor specific module, GVT
> feature could be enabled via specific hypervisor interface, e.g VFIO/mdev.
> 
> So this trys to use hypervisor module register/unregister interface
> for that. Hypervisor module needs to take care of module reference
> itself when working for hypervisor interface, e.g for VFIO/mdev,
> hypervisor module would reference counting mdev when open and release.
> 
> This makes 'kvmgt' module really split from GVT device model. User
> needs to load 'kvmgt' to enable VFIO/mdev interface.
> 
> v6:
> - remove unused variable
> 
> v5:
> - put module reference in register error path
> 
> v4:
> - fix checkpatch warning
> 
> v3:
> - Fix module reference handling for device open and release. Unused
>   mdev devices would be cleaned up in device unregister when module unload.
> 
> v2:
> - Fix kvmgt order after i915 for built-in case
> 
> Cc: "Yuan, Hang" <hang.yuan@intel.com>
> Cc: Alex Williamson <alex.williamson@redhat.com>
> Cc: "He, Min" <min.he@intel.com>
> Reviewed-by: Yuan, Hang <hang.yuan@intel.com>
> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

For what i915 is concerned, this is the desireable direction. When
combined with the other series about making GVT build independantly,
and golden MMIO state (instead of capturing at boot).

With those This should both expedite the i915 driver loading on DOM0,
when GVT can be loaded as secondary module. And the golden MMIO state
instead of capturing from host would avoid leaking any changes in host
configuration (say, due to BIOS update) to the guests.

So as an intermediary step to that direction, for i915 portion (not that
much in this case) this is:

Acked-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

I'm expecting somebody with more inisght to review the code under
gvt/.

Regards, Joonas
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