#
# Copyright (C) 2016 Yousong Zhou <yszhou4tech@gmail.com>
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
define KernelPackage/irqbypass
  SUBMENU:=Virtualization
  TITLE:=IRQ offload/bypass manager
  KCONFIG:=CONFIG_IRQ_BYPASS_MANAGER
  HIDDEN:=1
  FILES:= $(LINUX_DIR)/virt/lib/irqbypass.ko
  AUTOLOAD:=$(call AutoProbe,irqbypass.ko)
endef
$(eval $(call KernelPackage,irqbypass))


define KernelPackage/kvm-x86
  SUBMENU:=Virtualization
  TITLE:=Kernel-based Virtual Machine (KVM) support
  DEPENDS:=@TARGET_x86_generic||TARGET_x86_64 +kmod-irqbypass
  KCONFIG:=\
	  CONFIG_KVM \
	  CONFIG_KVM_MMU_AUDIT=n \
	  CONFIG_VIRTUALIZATION=y
  FILES:= $(LINUX_DIR)/arch/$(LINUX_KARCH)/kvm/kvm.ko
  AUTOLOAD:=$(call AutoProbe,kvm.ko)
endef

define KernelPackage/kvm-x86/description
  Support hosting fully virtualized guest machines using hardware
  virtualization extensions.  You will need a fairly recent
  processor equipped with virtualization extensions. You will also
  need to select one or more of the processor modules.

  This module provides access to the hardware capabilities through
  a character device node named /dev/kvm.
endef

$(eval $(call KernelPackage,kvm-x86))


define KernelPackage/kvm-intel
  SUBMENU:=Virtualization
  TITLE:=KVM for Intel processors support
  DEPENDS:=+kmod-kvm-x86
  KCONFIG:=CONFIG_KVM_INTEL
  FILES:= $(LINUX_DIR)/arch/$(LINUX_KARCH)/kvm/kvm-intel.ko
  AUTOLOAD:=$(call AutoProbe,kvm-intel.ko)
endef

define KernelPackage/kvm-intel/description
  Provides support for KVM on Intel processors equipped with the VT
  extensions.
endef

$(eval $(call KernelPackage,kvm-intel))


define KernelPackage/kvm-amd
  SUBMENU:=Virtualization
  TITLE:=KVM for AMD processors support
  DEPENDS:=+kmod-kvm-x86
  KCONFIG:=CONFIG_KVM_AMD
  FILES:= $(LINUX_DIR)/arch/$(LINUX_KARCH)/kvm/kvm-amd.ko
  AUTOLOAD:=$(call AutoProbe,kvm-amd.ko)
endef

define KernelPackage/kvm-amd/description
  Provides support for KVM on AMD processors equipped with the AMD-V
  (SVM) extensions.
endef

$(eval $(call KernelPackage,kvm-amd))

define KernelPackage/vfio-mdev
  SUBMENU:=Virtualization
  TITLE:=VFIO driver support to to virtualize devices
  DEPENDS:=@TARGET_x86_64
  KCONFIG:=	\
	  CONFIG_IOMMU_API=y	\
	  CONFIG_MMU=y	\
	  CONFIG_VFIO=y	\
	  CONFIG_VFIO_NOIOMMU=y	\
	  CONFIG_VFIO_PCI=y	\
	  CONFIG_VFIO_PCI_IGD=y	\
	  CONFIG_VFIO_MDEV	\
	  CONFIG_VFIO_MDEV_DEVICE
  FILES:=	\
	  $(LINUX_DIR)/drivers/vfio/mdev/mdev.ko	\
          $(LINUX_DIR)/drivers/vfio/mdev/vfio_mdev.ko
  AUTOLOAD:=$(call AutoProbe,mdev vfio_mdev)
endef

define KernelPackage/vfio-mdev/description
  Provides a framework to virtualize devices.
endef

$(eval $(call KernelPackage,vfio-mdev))

define KernelPackage/i915-gvt
  SUBMENU:=Virtualization
  TITLE:=Enable KVM/VFIO support for Intel GVT-g
  DEPENDS:=@TARGET_x86_64 +kmod-kvm-intel +kmod-drm-i915 +kmod-vfio-mdev
  KCONFIG:=    \
	  CONFIG_DRM_I915_GVT_KVMGT=m
  FILES:=$(LINUX_DIR)/drivers/gpu/drm/i915/gvt/kvmgt.ko
  AUTOLOAD:=$(call AutoProbe,kvmgt)
endef

define KernelPackage/i915-gvt/description
  Intel GVT-g is a technology that provides mediated device
  passthrough for Intel GPUs (Broadwell and newer). It can
  be used to virtualize the GPU for multiple guest virtual
  machines, effectively providing near-native graphics performance
  in the virtual machine and still letting your host use the
  virtualized GPU normally.

  Choose this option if you want to enable Intel GVT-g graphics
  virtualization technology host support with integrated graphics.
  With GVT-g, it's possible to have one integrated graphics
  device shared by multiple VMs under different hypervisors.

  Note that at least one hypervisor like Xen or KVM is required for
  this driver to work, and it only supports newer device from
  Broadwell+. For further information and setup guide, you can
  visit: http://01.org/igvt-g.

  Now it's just a stub to support the modifications of i915 for
  GVT device model. It requires at least one MPT modules for Xen/KVM
  and other components of GVT device model to work. Use it under
  you own risk.
endef

$(eval $(call KernelPackage,i915-gvt))