Commit 659643f7 authored by Jike Song's avatar Jike Song Committed by Zhenyu Wang
Browse files

drm/i915/gvt/kvmgt: add vfio/mdev support to KVMGT 



KVMGT leverages vfio/mdev to mediate device accesses from guest,
this patch adds the vfio/mdev support, thereby completes the
functionality. An intel_vgpu is presented as a mdev device,
and full userspace API compatibility with vfio-pci is kept.
An intel_vgpu_ops is provided to mdev framework, methods get
called to create/remove a vgpu, to open/close it, and to
access it.

Signed-off-by: default avatarKevin Tian <kevin.tian@intel.com>
Signed-off-by: default avatarXiaoguang Chen <xiaoguang.chen@intel.com>
Signed-off-by: default avatarJike Song <jike.song@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent f440c8a5

drivers/gpu/drm/i915/Kconfig

+1 −0
Original line number Original line Diff line number Diff line
@@ -116,6 +116,7 @@ config DRM_I915_GVT_KVMGT 
	tristate "Enable KVM/VFIO support for Intel GVT-g"

	tristate "Enable KVM/VFIO support for Intel GVT-g"

	depends on DRM_I915_GVT

	depends on DRM_I915_GVT

	depends on KVM

	depends on KVM

	depends on VFIO_MDEV && VFIO_MDEV_DEVICE

	default n

	default n

	help

	help

	  Choose this option if you want to enable KVMGT support for

	  Choose this option if you want to enable KVMGT support for

drivers/gpu/drm/i915/gvt/Makefile

+0 −2
Original line number Original line Diff line number Diff line
@@ -5,6 +5,4 @@ GVT_SOURCE := gvt.o aperture_gm.o handlers.o vgpu.o trace_points.o firmware.o \ 




ccflags-y				+= -I$(src) -I$(src)/$(GVT_DIR) -Wall

ccflags-y				+= -I$(src) -I$(src)/$(GVT_DIR) -Wall

i915-y					+= $(addprefix $(GVT_DIR)/, $(GVT_SOURCE))

i915-y					+= $(addprefix $(GVT_DIR)/, $(GVT_SOURCE))



CFLAGS_kvmgt.o				:= -Wno-unused-function

obj-$(CONFIG_DRM_I915_GVT_KVMGT)	+= $(GVT_DIR)/kvmgt.o
 
obj-$(CONFIG_DRM_I915_GVT_KVMGT)	+= $(GVT_DIR)/kvmgt.o

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

+4 −2
Original line number Original line Diff line number Diff line
@@ -164,15 +164,17 @@ struct intel_vgpu { 




#if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)

#if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)

	struct {

	struct {

		struct device *mdev;

		struct mdev_device *mdev;

		struct vfio_region *region;

		struct vfio_region *region;

		int num_regions;

		int num_regions;

		struct eventfd_ctx *intx_trigger;

		struct eventfd_ctx *intx_trigger;

		struct eventfd_ctx *msi_trigger;

		struct eventfd_ctx *msi_trigger;

		struct rb_root cache;

		struct rb_root cache;

		struct mutex cache_lock;

		struct mutex cache_lock;

		void *vfio_group;

		struct notifier_block iommu_notifier;

		struct notifier_block iommu_notifier;

		struct notifier_block group_notifier;

		struct kvm *kvm;

		struct work_struct release_work;

	} vdev;

	} vdev;

#endif

#endif

};

};

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

+902 −36

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