heads/modules/linux

modules-y += linux

linux_version := 4.9.38
linux_dir := linux-$(linux_version)
linux_tar := linux-$(linux_version).tar.xz
linux_url := https://cdn.kernel.org/pub/linux/kernel/v4.x/$(linux_tar)

linux-4.9.7_hash := 0b61283b71c7397cb6b5ac3497845d3cdf8137ecd16ab39c8ac6cf5bb90e33dc
linux-4.9.20_hash := 48660806dd32fb8dcbcf5932291bf6cc7d29240070372230871e0f56fea81341
linux-4.9.38_hash := 76d789d87dd51d2fd58c095727171984fa4a992f5e25b9e3eb1e5fd5cd129074

linux_hash := $(linux-$(linux_version)_hash)

linux_configure := \
	$(MAKE) \
		CROSS_COMPILE="$(CROSS)" \
		oldconfig \

linux_output := arch/x86/boot/bzImage
linux_config := linux.config

# qemu
linux_modules-$(CONFIG_LINUX_E1000)	+= drivers/net/ethernet/intel/e1000/e1000.ko

# x230
linux_modules-$(CONFIG_LINUX_E1000E)	+= drivers/net/ethernet/intel/e1000e/e1000e.ko

linux_modules-$(CONFIG_LINUX_USB)	+= drivers/usb/host/ehci-hcd.ko
linux_modules-$(CONFIG_LINUX_USB)	+= drivers/usb/host/ehci-pci.ko
linux_modules-$(CONFIG_LINUX_USB)	+= drivers/usb/host/xhci-hcd.ko
linux_modules-$(CONFIG_LINUX_USB)	+= drivers/usb/host/xhci-pci.ko
linux_modules-$(CONFIG_LINUX_USB)	+= drivers/usb/storage/usb-storage.ko

EXTRA_FLAGS := -fdebug-prefix-map=$(pwd)=heads -gno-record-gcc-switches

linux_target := \
	CROSS_COMPILE="$(CROSS)" \
	AFLAGS_KERNEL="$(EXTRA_FLAGS)" \
	CFLAGS_KERNEL="$(EXTRA_FLAGS)" \
	CFLAGS_MODULE="$(EXTRA_FLAGS)" \
	KBUILD_BUILD_USER=user \
	KBUILD_BUILD_HOST=heads-build \
	KBUILD_BUILD_TIMESTAMP="1970-00-00" \
	KBUILD_BUILD_VERSION=0 \
	$(MAKE_JOBS) \

# We cross compile linux now
linux_depends := musl-cross
Build time configuration for startup scripts and modules. This addresses multiple issues: * Issue #63: initrd is build fresh each time, so tracked files do not matter. * Issue #144: build time configuration * Issue #123: allows us to customize the startup experience * Issue #122: manual start-xen will go away * Issue #25: tpmtotp PCRs are updated after reading the secret * Issue #16: insmod now meaures modules 2017-03-31 15:18:46 +00:00			`modules-y += linux`
build the linux kernel after building the initrd 2016-08-03 01:23:18 +00:00
bump Linux kernel to 4.9.38 (issue #224) 2017-07-18 18:25:15 +00:00			`linux_version := 4.9.38`
build the linux kernel after building the initrd 2016-08-03 01:23:18 +00:00			`linux_dir := linux-$(linux_version)`
			`linux_tar := linux-$(linux_version).tar.xz`
			`linux_url := https://cdn.kernel.org/pub/linux/kernel/v4.x/$(linux_tar)`
allow linux 4.7 to be selected 2016-08-05 16:24:16 +00:00
use Linux 4.9.7 kernel (issue #103) 2017-02-01 16:47:43 +00:00			`linux-4.9.7_hash := 0b61283b71c7397cb6b5ac3497845d3cdf8137ecd16ab39c8ac6cf5bb90e33dc`
move to Linux 4.9.20 (issue #149) 2017-03-31 19:59:37 +00:00			`linux-4.9.20_hash := 48660806dd32fb8dcbcf5932291bf6cc7d29240070372230871e0f56fea81341`
bump Linux kernel to 4.9.38 (issue #224) 2017-07-18 18:25:15 +00:00			`linux-4.9.38_hash := 76d789d87dd51d2fd58c095727171984fa4a992f5e25b9e3eb1e5fd5cd129074`
allow linux 4.7 to be selected 2016-08-05 16:24:16 +00:00
			`linux_hash := $(linux-$(linux_version)_hash)`
build the linux kernel after building the initrd 2016-08-03 01:23:18 +00:00
bootstrap the musl-libc gcc cross compiler and use it to build everything except coreboot 2017-01-27 22:55:44 +00:00			`linux_configure := \`
			`$(MAKE) \`
Use kernel headers from our Linux kernel tree (issue #188) 2017-04-16 18:18:46 +00:00			`CROSS_COMPILE="$(CROSS)" \`
bootstrap the musl-libc gcc cross compiler and use it to build everything except coreboot 2017-01-27 22:55:44 +00:00			`oldconfig \`

build the linux kernel after building the initrd 2016-08-03 01:23:18 +00:00			`linux_output := arch/x86/boot/bzImage`
Make coreboot building modular to support multiple boards. This touches most of the module configurations since the coreboot build process had to add a few new features. The Linux kernel could make use of it as well if we need separate x230/chell/qemu kernels, for instance. 2016-11-23 17:11:08 +00:00			`linux_config := linux.config`
bootstrap the musl-libc gcc cross compiler and use it to build everything except coreboot 2017-01-27 22:55:44 +00:00
move usb-storage into a kernel module (issue #160) 2017-04-05 23:20:53 +00:00			`# qemu`
Build time configuration for startup scripts and modules. This addresses multiple issues: * Issue #63: initrd is build fresh each time, so tracked files do not matter. * Issue #144: build time configuration * Issue #123: allows us to customize the startup experience * Issue #122: manual start-xen will go away * Issue #25: tpmtotp PCRs are updated after reading the secret * Issue #16: insmod now meaures modules 2017-03-31 15:18:46 +00:00			`linux_modules-$(CONFIG_LINUX_E1000) += drivers/net/ethernet/intel/e1000/e1000.ko`
move usb-storage into a kernel module (issue #160) 2017-04-05 23:20:53 +00:00
			`# x230`
Build time configuration for startup scripts and modules. This addresses multiple issues: * Issue #63: initrd is build fresh each time, so tracked files do not matter. * Issue #144: build time configuration * Issue #123: allows us to customize the startup experience * Issue #122: manual start-xen will go away * Issue #25: tpmtotp PCRs are updated after reading the secret * Issue #16: insmod now meaures modules 2017-03-31 15:18:46 +00:00			`linux_modules-$(CONFIG_LINUX_E1000E) += drivers/net/ethernet/intel/e1000e/e1000e.ko`
move usb-storage into a kernel module (issue #160) 2017-04-05 23:20:53 +00:00
Build time configuration for startup scripts and modules. This addresses multiple issues: * Issue #63: initrd is build fresh each time, so tracked files do not matter. * Issue #144: build time configuration * Issue #123: allows us to customize the startup experience * Issue #122: manual start-xen will go away * Issue #25: tpmtotp PCRs are updated after reading the secret * Issue #16: insmod now meaures modules 2017-03-31 15:18:46 +00:00			`linux_modules-$(CONFIG_LINUX_USB) += drivers/usb/host/ehci-hcd.ko`
			`linux_modules-$(CONFIG_LINUX_USB) += drivers/usb/host/ehci-pci.ko`
			`linux_modules-$(CONFIG_LINUX_USB) += drivers/usb/host/xhci-hcd.ko`
			`linux_modules-$(CONFIG_LINUX_USB) += drivers/usb/host/xhci-pci.ko`
move usb-storage into a kernel module (issue #160) 2017-04-05 23:20:53 +00:00			`linux_modules-$(CONFIG_LINUX_USB) += drivers/usb/storage/usb-storage.ko`
Change ethernet drivers to be modules and measure them when they are loaded. This is a step towards unifying the server and laptop config (issue #139) and also makes it possible to later remove the USB modules from the normal boot path. 2017-03-28 20:32:58 +00:00
pass in flags to make Linux kernel reproducible (issue #94) 2017-01-28 23:38:29 +00:00			`EXTRA_FLAGS := -fdebug-prefix-map=$(pwd)=heads -gno-record-gcc-switches`

bootstrap the musl-libc gcc cross compiler and use it to build everything except coreboot 2017-01-27 22:55:44 +00:00			`linux_target := \`
Use kernel headers from our Linux kernel tree (issue #188) 2017-04-16 18:18:46 +00:00			`CROSS_COMPILE="$(CROSS)" \`
pass in flags to make Linux kernel reproducible (issue #94) 2017-01-28 23:38:29 +00:00			`AFLAGS_KERNEL="$(EXTRA_FLAGS)" \`
			`CFLAGS_KERNEL="$(EXTRA_FLAGS)" \`
			`CFLAGS_MODULE="$(EXTRA_FLAGS)" \`
			`KBUILD_BUILD_USER=user \`
			`KBUILD_BUILD_HOST=heads-build \`
			`KBUILD_BUILD_TIMESTAMP="1970-00-00" \`
			`KBUILD_BUILD_VERSION=0 \`
Use kernel headers from our Linux kernel tree (issue #188) 2017-04-16 18:18:46 +00:00			`$(MAKE_JOBS) \`
Linux kernel depends on musl-cross (issue #130) 2017-03-20 18:52:03 +00:00
			`# We cross compile linux now`
Linux does not need the musl-libc, just the cross compiler (issue #175) 2017-04-09 06:11:18 +00:00			`linux_depends := musl-cross`