payloads: Add LinuxBoot payload in u-root mode

* Add LinuxBoot support
* Add u-root mode
* Download kernel and u-root from upstream sources.
* Add customization options
* Clean kernel only if directory exists

Change-Id: I3a25ff6812e046acc688cbbb203cf262ad751659
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: https://review.coreboot.org/23071
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

4 files changed, 279 insertions, 0 deletions

diff --git a/payloads/external/LinuxBoot/Kconfig b/payloads/external/LinuxBoot/Kconfig
new file mode 100644
index 0000000000..74e6c9451c
--- /dev/null
+++ b/payloads/external/LinuxBoot/Kconfig
@@ -0,0 +1,113 @@
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2017 Facebook Inc.
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+if PAYLOAD_LINUXBOOT
+
+choice
+	prompt "Architecture"
+	default LINUXBOOT_X86_64
+
+config LINUXBOOT_X86_64
+	bool "x86_64"
+	help
+	  AMD64 kernel and initramfs
+
+config LINUXBOOT_X86
+	bool "x86"
+	help
+	  X86 kernel and initramfs
+endchoice
+
+config LINUXBOOT_ARCH
+	string
+	default "amd64" if LINUXBOOT_X86_64
+	default "386" if LINUXBOOT_X86
+
+choice
+	prompt "Kernel version"
+	default LINUXBOOT_KERNEL_STABLE
+
+config LINUXBOOT_KERNEL_STABLE
+	bool "4.15.3"
+	help
+	  Stable kernel version
+endchoice
+
+config LINUXBOOT_KERNEL_VERSION
+	string
+	default "4.15.3" if LINUXBOOT_KERNEL_STABLE
+
+config LINUXBOOT_KERNEL_CONFIGFILE
+	string "Kernel config file"
+	default ""
+	help
+	  Add your own kernel configuration file. Otherwise a default
+	  minimal defconfig is used.
+
+config LINUXBOOT_KERNEL_COMMANDLINE
+	string "Kernel command-line"
+	default ""
+	help
+	  Add your own kernel command-line arguments.
+
+config PAYLOAD_FILE
+	default "payloads/external/LinuxBoot/linuxboot/kernel-image"
+
+choice
+	prompt "Payload Mode"
+	default LINUXBOOT_UROOT
+
+config LINUXBOOT_UROOT
+	bool "u-root"
+	help
+	  Enable u-root linuxboot mode.
+	  See http://u-root.tk/ for more information.
+endchoice
+
+if LINUXBOOT_UROOT
+
+choice
+	prompt "U-root version"
+	default LINUXBOOT_UROOT_MASTER
+
+config LINUXBOOT_UROOT_MASTER
+	bool "master"
+	help
+	  Latest u-root version
+endchoice
+
+config LINUXBOOT_UROOT_VERSION
+	string
+	default "master" if LINUXBOOT_UROOT_MASTER
+
+config LINUXBOOT_UROOT_COMMANDS
+	string "Select u-root commands"
+	default ""
+	help
+	  Comma separated list of additional modules to include. Otherwise all modules
+	  of u-root are included.
+
+config LINUXBOOT_UROOT_FILES
+	string "Add files to u-root base"
+	default ""
+	help
+	  Path to directory containing root structure for embedding into the
+	  initramfs.
+
+config PAYLOAD_USERSPACE
+	string ""
+	default "payloads/external/LinuxBoot/linuxboot/initramfs.cpio.xz"
+
+endif
+endif
diff --git a/payloads/external/LinuxBoot/Kconfig.name b/payloads/external/LinuxBoot/Kconfig.name
new file mode 100644
index 0000000000..b7b10853ad
--- /dev/null
+++ b/payloads/external/LinuxBoot/Kconfig.name
@@ -0,0 +1,23 @@
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2017 Facebook Inc.
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+config PAYLOAD_LINUXBOOT
+	bool "LinuxBoot"
+	depends on ARCH_X86
+	help
+	  Select this option if you want to build a coreboot image
+	  with a LinuxBoot payload. If you don't know what this is
+	  about, just leave it enabled.
+
+	  See https://coreboot.org/Payloads for more information.
diff --git a/payloads/external/LinuxBoot/Makefile b/payloads/external/LinuxBoot/Makefile
new file mode 100644
index 0000000000..10ad0c3391
--- /dev/null
+++ b/payloads/external/LinuxBoot/Makefile
@@ -0,0 +1,63 @@
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2017 Facebook Inc.
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+kernel_tarball=https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-$(CONFIG_LINUXBOOT_KERNEL_VERSION).tar.xz
+project_dir=linuxboot
+kernel_dir=$(project_dir)/kernel
+
+unexport $(COREBOOT_EXPORTS)
+
+all: payload
+
+$(kernel_dir)/.config:
+	echo "    WWW        Download Linux $(CONFIG_LINUXBOOT_KERNEL_VERSION)"
+	mkdir -p $(kernel_dir)
+ifeq ("$(wildcard $(kernel_dir)/README)","")
+	wget -qO- $(kernel_tarball) | tar xJ -C $(kernel_dir) --strip 1
+endif
+
+config: $(kernel_dir)/.config
+	echo "    CONFIG     Linux $(CONFIG_LINUXBOOT_KERNEL_VERSION)"
+ifneq ($(CONFIG_LINUXBOOT_KERNEL_CONFIGFILE),)
+	cp $(CONFIG_LINUXBOOT_KERNEL_CONFIGFILE) $(kernel_dir)/.config
+endif
+ifeq ($(CONFIG_LINUXBOOT_ARCH),386)
+	cp x86/defconfig $(kernel_dir)/.config
+else ifeq ($(CONFIG_LINUXBOOT_ARCH),amd64)
+	cp x86_64/defconfig $(kernel_dir)/.config
+endif
+
+$(project_dir)/kernel-image: config
+	echo "    MAKE       Kernel $(CONFIG_LINUXBOOT_KERNEL_VERSION)"
+	$(MAKE) -C $(kernel_dir) olddefconfig
+	$(MAKE) -C $(kernel_dir) -j $(CPUS)
+ifeq ($(CONFIG_LINUXBOOT_ARCH),386)
+	cp $(kernel_dir)/arch/x86/boot/bzImage $(project_dir)/kernel-image
+else ifeq ($(CONFIG_LINUXBOOT_ARCH),amd64)
+	cp $(kernel_dir)/arch/x86/boot/bzImage $(project_dir)/kernel-image
+endif
+
+payload: $(project_dir)/kernel-image
+ifeq ($(CONFIG_LINUXBOOT_UROOT),y)
+	$(MAKE) -f targets/u-root.mk
+endif
+
+clean:
+	if [ -d "$(kernel_dir)" ]; then make -C $(kernel_dir) clean; fi
+	rm -f $(project_dir)/initramfs.cpio.xz
+
+distclean:
+	rm -rf $(project_dir)
+
+.PHONY: config patch payload clean distclean clone fetch all
diff --git a/payloads/external/LinuxBoot/targets/u-root.mk b/payloads/external/LinuxBoot/targets/u-root.mk
new file mode 100644
index 0000000000..9b0e5687d7
--- /dev/null
+++ b/payloads/external/LinuxBoot/targets/u-root.mk
@@ -0,0 +1,80 @@
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2017 Facebook Inc.
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+uroot_git_repo=https://github.com/u-root/u-root.git
+uroot_dir=$(project_dir)/go/src/github.com/u-root/u-root
+go_check=$(shell command -v go 1>/dev/null 2>&1 && echo go)
+project_dir=$(shell pwd)/linuxboot
+project_name=u-root
+go_path_dir=$(shell pwd)/linuxboot/go
+
+all: build
+
+check:
+ifneq ($(go_check),go)
+	printf "\n<<Please install Golang >= 1.9 for u-root mode>>\n\n"
+	exit 1
+endif
+	mkdir -p $(project_dir)/go/src/github.com/u-root
+
+$(uroot_dir)/.git:
+	echo "    Git        Cloning u-root $(CONFIG_LINUXBOOT_UROOT_VERSION)"
+	git clone $(uroot_git_repo) $(uroot_dir)
+
+fetch: check $(uroot_dir)/.git
+	-cd "$(uroot_dir)" && git fetch origin
+
+checkout: fetch
+	cd "$(uroot_dir)" && \
+	if ! git diff --quiet _cb_checkout "$(CONFIG_LINUXBOOT_UROOT_VERSION)" -- 2>/dev/null; \
+	then \
+		printf "    CHECKOUT    $(project_name) [$(CONFIG_LINUXBOOT_UROOT_VERSION)]\n"; \
+		git checkout $$(git rev-parse HEAD) >/dev/null 2>&1; \
+		git branch -f _cb_checkout "$(CONFIG_LINUXBOOT_UROOT_VERSION)" && \
+		git checkout _cb_checkout && \
+		$(if $(project_patches), \
+		for patch in $(project_patches); do \
+			printf "    PATCH       $$patch\n"; \
+			git am --keep-cr "$$patch" || \
+				( printf "Error when applying patches.\n"; \
+				  git am --abort; exit 1; ); \
+		done;,true;) \
+	fi
+
+$(project_dir)/initramfs.cpio.xz: checkout
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) go build u-root.go
+	echo "    MAKE       u-root $(CONFIG_LINUXBOOT_UROOT_VERSION)"
+ifneq ($(CONFIG_LINUXBOOT_UROOT_COMMANDS),)
+ifneq ($(CONFIG_LINUXBOOT_UROOT_FILES),)
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) ./u-root \
+	-build=bb -files $(CONFIG_LINUXBOOT_UROOT_FILES) -o $(project_dir)/initramfs.cpio \
+	./cmds/{$(CONFIG_LINUXBOOT_UROOT_COMMANDS)}
+else
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) ./u-root \
+	-build=bb -o $(project_dir)/initramfs.cpio ./cmds/{$(CONFIG_LINUXBOOT_UROOT_COMMANDS)}
+endif
+else
+ifneq ($(CONFIG_LINUXBOOT_UROOT_FILES),)
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) ./u-root \
+	-build=bb -files $(CONFIG_LINUXBOOT_UROOT_FILES) -o $(project_dir)/initramfs.cpio
+else
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) ./u-root \
+	-build=bb -o $(project_dir)/initramfs.cpio
+endif
+endif
+	xz -f --check=crc32 -9 --lzma2=dict=1MiB --threads=$(CPUS) $(project_dir)/initramfs.cpio
+
+build: $(project_dir)/initramfs.cpio.xz
+
+.PHONY: build checkout fetch all check