[OpenWrt-Devel] [PATCH] kernel: Hyper-V support for Linux 3.18
Ning Ye
ning at oaklight.us
Thu Dec 3 09:40:31 EST 2015
Thanks for the comments.
1) On target dependency, the build is depend upon x86 or x84_64. I don't
see a reason to depend on @TARGET_x86_kvm_guest, as my primary goal is to
run under Microsoft Hyper-V in a lab environment. I have KVM, but it's not
my primary VM platform.
> + DEPENDS:=@(TARGET_x86||TARGET_x86_64)
2) I have tried to build the kernel module as oppose to build into the
kernel directly. The build generates the ipk successfully, but at boot
time, those modules wouldn't load; thus it hangs during the kernel boot.
Try to change those flags from y to m and test. If anyone has a way to
build and load them as kernel modules, I would love to see how.
It doesn't really bother me as built-in kernel drivers, because this is a
custom built for any of the VM environments (vmware, hyper-v, xen, virtual
box, etc). So I know the modules are required anyway. It's never my
intention to build a generic kernel with loadable modules due to
space/memory restrictions. I want a smallest workable footprint to run
behind private VM network switch.
Thanks.
Ning
-----Original Message-----
From: Hauke Mehrtens [mailto:hauke at hauke-m.de]
Sent: Wednesday, December 02, 2015 5:13 PM
To: Ning Ye <ning at oaklight.us>; openwrt-devel at lists.openwrt.org
Subject: Re: [OpenWrt-Devel] [PATCH] kernel: Hyper-V support for Linux 3.18
On 11/27/2015 05:25 PM, Ning Ye wrote:
> kernel: Update Hyper-V support for Linux 3.18 and OpenWRT trunk. Now
> requires at least 96 MB memory for VM.
>
> Signed-off-by: Ning Ye <ning at oaklight.us>
Getting Hyper-V guest support into OpenWrt is a good plan.
I am still thinking about how it should be integrated.
hyperv needs some parts build into the kernel image, so these parts should
not be selected in the virtual.mk file. As most of the parts which have to
be build in are already in the kvm subtarget I would suggest to extend the
kvm and the 64 subtarget to also support hyperv.
You should make your hyperv packages depend on
DEPENDS:=@TARGET_x86_kvm_guest||TARGET_x86_64
These subtargets already have CONFIG_HYPERVISOR_GUEST=y set.
Then you can add OpenWrt kernel packages for the modules you already added
modules and please also make CONFIG_HYPERV a module if it is possible.
> ---
> config/Config-images.in | 10 ++++
> package/kernel/linux/modules/virtual.mk | 86
> +++++++++++++++++++++++++++++++++
> target/linux/x86/config-3.18 | 9 ++++
> target/linux/x86/image/Makefile | 10 ++++
> 4 files changed, 115 insertions(+)
>
> diff --git a/config/Config-images.in b/config/Config-images.in index
> a60dd50..ff16ef0 100644
> --- a/config/Config-images.in
> +++ b/config/Config-images.in
> @@ -238,6 +238,16 @@ menu "Target Images"
> select TARGET_IMAGES_PAD
> select PACKAGE_kmod-e1000
>
> + config VHD_IMAGES
> + bool "Build Hyper-V image files (VHD)"
> + depends on TARGET_x86 || TARGET_x86_64
> + select GRUB_IMAGES
> + select TARGET_IMAGES_PAD
> + select PACKAGE_kmod-hyperv-balloon
> + select PACKAGE_kmod-hyperv-net-vsc
> + select PACKAGE_kmod-hyperv-util
> + select PACKAGE_kmod-hyperv-storage
> +
> config TARGET_IMAGES_PAD
> bool "Pad images to filesystem size (for JFFS2)"
> depends on GRUB_IMAGES
> diff --git a/package/kernel/linux/modules/virtual.mk
> b/package/kernel/linux/modules/virtual.mk
> index 61a8a87..2d9f8dd 100644
> --- a/package/kernel/linux/modules/virtual.mk
> +++ b/package/kernel/linux/modules/virtual.mk
> @@ -169,3 +169,89 @@ define KernelPackage/xen-pcidev/description
> endef
>
> $(eval $(call KernelPackage,xen-pcidev))
> +
> +#
> +# Hyper-V Drives depends on x86 or x86_64.
> +#
> +define KernelPackage/hyperv-balloon
> + SUBMENU:=$(VIRTUAL_MENU)
> + DEPENDS:=@(TARGET_x86||TARGET_x86_64)
> + TITLE:=Microsoft Hyper-V Balloon Driver
> + KCONFIG:= \
> + CONFIG_HYPERV_BALLOON \
> + CONFIG_HYPERVISOR_GUEST=y \
> + CONFIG_PARAVIRT=n \
> + CONFIG_HYPERV=y
> + FILES:=$(LINUX_DIR)/drivers/hv/hv_balloon.ko \
> + $(LINUX_DIR)/drivers/hv/hv_vmbus.ko
> + AUTOLOAD:=$(call AutoLoad,06,hv_balloon) endef
> +
> +define KernelPackage/hyperv-balloon/description
> + Microsofot Hyper-V balloon driver.
> +endef
> +
> +$(eval $(call KernelPackage,hyperv-balloon))
> +
> +define KernelPackage/hyperv-net-vsc
> + SUBMENU:=$(VIRTUAL_MENU)
> + DEPENDS:=@(TARGET_x86||TARGET_x86_64)
> + TITLE:=Microsoft Hyper-V Network Driver
> + KCONFIG:= \
> + CONFIG_HYPERV_NET \
> + CONFIG_HYPERVISOR_GUEST=y \
> + CONFIG_PARAVIRT=n \
> + CONFIG_HYPERV=y
> + FILES:=$(LINUX_DIR)/drivers/net/hyperv/hv_netvsc.ko \
> + $(LINUX_DIR)/drivers/hv/hv_vmbus.ko
> + AUTOLOAD:=$(call AutoLoad,35,hv_netvsc) endef
> +
> +define KernelPackage/hyperv-net-vsc/description
> + Microsoft Hyper-V Network Driver
> +endef
> +
> +$(eval $(call KernelPackage,hyperv-net-vsc))
> +
> +define KernelPackage/hyperv-util
> + SUBMENU:=$(VIRTUAL_MENU)
> + DEPENDS:=@(TARGET_x86||TARGET_x86_64)
> + TITLE:=Microsoft Hyper-V Utility Driver
> + KCONFIG:= \
> + CONFIG_HYPERV_UTILS \
> + CONFIG_HYPERVISOR_GUEST=y \
> + CONFIG_PARAVIRT=n \
> + CONFIG_HYPERV=y
> + FILES:=$(LINUX_DIR)/drivers/hv/hv_util.ko \
> + $(LINUX_DIR)/drivers/hv/hv_vmbus.ko
> + AUTOLOAD:=$(call AutoLoad,10,hv_util) endef
> +
> +define KernelPackage/hyperv-util/description
> + Microsoft Hyper-V Utility Driver
> +endef
> +
> +$(eval $(call KernelPackage,hyperv-util))
> +
> +#
> +# Hyper-V Storage Drive needs to be in kernel rather than module to
> +load
> the root fs.
> +#
> +define KernelPackage/hyperv-storage
> + SUBMENU:=$(VIRTUAL_MENU)
> + DEPENDS:=@(TARGET_x86||TARGET_x86_64) +kmod-scsi-core
> + TITLE:=Microsoft Hyper-V Storage Driver
> + KCONFIG:= \
> + CONFIG_HYPERV_STORAGE=y \
> + CONFIG_HYPERVISOR_GUEST=y \
> + CONFIG_PARAVIRT=n \
> + CONFIG_HYPERV=y
> + FILES:=$(LINUX_DIR)/drivers/scsi/hv_storvsc.ko \
> + $(LINUX_DIR)/drivers/hv/hv_vmbus.ko
> + AUTOLOAD:=$(call AutoLoad,40,hv_storvsc) endef
> +
> +define KernelPackage/hyperv-storage/description
> + Microsoft Hyper-V Storage Driver
> +endef
> +
> +$(eval $(call KernelPackage,hyperv-storage))
> diff --git a/target/linux/x86/config-3.18
> b/target/linux/x86/config-3.18 index bb647c8..8ac3709 100644
> --- a/target/linux/x86/config-3.18
> +++ b/target/linux/x86/config-3.18
> @@ -204,6 +204,15 @@ CONFIG_HW_RANDOM=y CONFIG_HW_RANDOM_GEODE=y
> CONFIG_HW_RANDOM_VIA=y # CONFIG_HYPERVISOR_GUEST is not set
> +# CONFIG_HYPERV is not set
> +# CONFIG_HYPERV_BALLOON is not set
> +# CONFIG_HYPERV_NET is not set
> +# CONFIG_HYPERV_STORAGE is not set
> +# CONFIG_HYPERV_UTILS is not set
> +# CONFIG_HYPERV_KEYBOARD is not set
> +# CONFIG_FB_HYPERV is not set
> +# CONFIG_HID_HYPERV_MOUSE is not set
> +# CONFIG_VMWARE_BALLOON is not set
> CONFIG_HZ_PERIODIC=y
> CONFIG_I8253_LOCK=y
> # CONFIG_I8K is not set
> diff --git a/target/linux/x86/image/Makefile
> b/target/linux/x86/image/Makefile index 8e56372..50507a7 100644
> --- a/target/linux/x86/image/Makefile
> +++ b/target/linux/x86/image/Makefile
> @@ -148,6 +148,15 @@ ifneq ($(CONFIG_VMDK_IMAGES),)
> endef
> endif
>
> +ifneq ($(CONFIG_VHD_IMAGES),)
> + define Image/Build/vhd
> + rm $(BIN_DIR)/$(IMG_PREFIX)-combined-$(1).vhd || true
> + qemu-img convert -f raw -O vpc \
> + $(BIN_DIR)/$(IMG_PREFIX)-combined-$(1).img \
> + $(BIN_DIR)/$(IMG_PREFIX)-combined-$(1).vhd
> + endef
> +endif
> +
> define Image/Build/gzip
> gzip -f9n $(BIN_DIR)/$(IMG_PREFIX)-combined-$(1).img
> gzip -f9n $(BIN_DIR)/$(IMG_PREFIX)-rootfs-$(1).img
> @@ -219,6 +228,7 @@ define Image/Build
> $(call Image/Build/grub2,$(1))
> $(call Image/Build/vdi,$(1))
> $(call Image/Build/vmdk,$(1))
> + $(call Image/Build/vhd,$(1))
> $(CP) $(KDIR)/root.$(1) $(BIN_DIR)/$(IMG_PREFIX)-rootfs-$(1).img
> else
> $(CP) $(KDIR)/root.iso $(BIN_DIR)/$(IMG_PREFIX).iso
> --
> 1.9.1
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