package: add kernel packages for kvm virtualization

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

package/kernel/linux/modules/virt.mk

@@ -0,0 +1,105 @@
+#
+# 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/vhost_net
+  SUBMENU:=Virtualization
+  TITLE:=Host kernel accelerator for virtio net
+  DEPENDS:=
+  KCONFIG:=CONFIG_VHOST_NET
+  FILES:= $(LINUX_DIR)/drivers/vhost/vhost_net.ko
+  AUTOLOAD:=$(call AutoProbe,vhost_net.ko)
+endef
+
+define KernelPackage/vhost_net/description
+  This kernel module can be loaded in host kernel to accelerate
+  guest networking with virtio_net. Not to be confused with virtio_net
+  module itself which needs to be loaded in guest kernel.
+endef
+
+$(eval $(call KernelPackage,vhost_net))
+
+
+define KernelPackage/irqbypass
+  SUBMENU:=Virtualization
+  TITLE:=IRQ offload/bypass manager
+  KCONFIG:=CONFIG_IRQ_BYPASS_MANAGER
+  FILES:= $(LINUX_DIR)/virt/lib/irqbypass.ko
+  AUTOLOAD:=$(call AutoProbe,irqbypass.ko)
+endef
+
+define KernelPackage/irqbypass/description
+  Various virtualization hardware acceleration techniques allow bypassing or
+  offloading interrupts received from devices around the host kernel.  Posted
+  Interrupts on Intel VT-d systems can allow interrupts to be received
+  directly by a virtual machine.  ARM IRQ Forwarding allows forwarded physical
+  interrupts to be directly deactivated by the guest.  This manager allows
+  interrupt producers and consumers to find each other to enable this sort of
+  bypass.
+endef
+
+$(eval $(call KernelPackage,irqbypass))
+
+
+define KernelPackage/kvm-x86
+  SUBMENU:=Virtualization
+  TITLE:=Kernel-based Virtual Machine (KVM) support
+  DEPENDS:=@TARGET_x86 +kmod-irqbypass
+  KCONFIG:=\
+	  CONFIG_VIRTUALIZATION=y \
+	  CONFIG_KVM \
+	  CONFIG_VHOST_NET=n \
+	  CONFIG_VHOST_CROSS_ENDIAN_LEGACY=n \
+	  CONFIG_TASK_XACCT=n \
+
+  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:=@TARGET_x86 +kmod-kvm-x86
+  KCONFIG:=CONFIG_KVM_INTEL CONFIG_KVM_AMD=n
+  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:=@TARGET_x86 +kmod-kvm-x86
+  KCONFIG:=CONFIG_KVM_INTEL=n 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))