# Configuration for building a coreboot ROM that works in
# the qemu emulator in graphical mode thanks to FBWhiptail
# This version requires a supported HOTP Security dongle (Nitrokey Pro/Storage or Librem Key)
#
# TPM can be used with a qemu software TPM (TIS, 2.0).
export CONFIG_COREBOOT=y
export CONFIG_COREBOOT_VERSION=4.13
export CONFIG_LINUX_VERSION=5.10.5

#Enable DEBUG output
export CONFIG_DEBUG_OUTPUT=y
export CONFIG_ENABLE_FUNCTION_TRACING_OUTPUT=y

CONFIG_COREBOOT_CONFIG=config/coreboot-qemu-tpm2.config
CONFIG_LINUX_CONFIG=config/linux-qemu.config

ifeq "$(CONFIG_UROOT)" "y"
CONFIG_BUSYBOX=n
else
CONFIG_KEXEC=y
CONFIG_QRENCODE=y
CONFIG_TPMTOTP=y
CONFIG_POPT=y
CONFIG_FLASHTOOLS=y
CONFIG_FLASHROM=y
CONFIG_PCIUTILS=y
CONFIG_UTIL_LINUX=y
CONFIG_CRYPTSETUP2=y
CONFIG_GPG2=y
CONFIG_LVM2=y
CONFIG_MBEDTLS=y
CONFIG_DROPBEAR=y
CONFIG_MSRTOOLS=y
CONFIG_HOTPKEY=y

#Uncomment only one of the following block
#Required for graphical gui-init (FBWhiptail)
CONFIG_CAIRO=y
CONFIG_FBWHIPTAIL=y
#
#text-based init (generic-init and gui-init)
#CONFIG_NEWT=y
#CONFIG_SLANG=y

endif

export CONFIG_LINUX_USB_COMPANION_CONTROLLER=y
CONFIG_LINUX_USB=y
CONFIG_LINUX_E1000=y

#Uncomment only one BOOTSCRIPT:
#Whiptail-based init (text-based or FBWhiptail)
export CONFIG_BOOTSCRIPT=/bin/gui-init
#
#text-based original init:
#export CONFIG_BOOTSCRIPT=/bin/generic-init
export CONFIG_BOOT_REQ_HASH=n
export CONFIG_BOOT_REQ_ROLLBACK=n
export CONFIG_BOOT_RECOVERY_SERIAL="/dev/ttyS0"
export CONFIG_BOOT_KERNEL_ADD="console=ttyS0 console=tty systemd.zram=0"
export CONFIG_BOOT_KERNEL_REMOVE="quiet rhgb splash"

#TPM2 requirements
export CONFIG_TPM2_TOOLS=y
export CONFIG_PRIMARY_KEY_TYPE=ecc
CONFIG_TPM2_TSS=y
CONFIG_OPENSSL=y

export CONFIG_BOOT_DEV="/dev/vda1"
export CONFIG_BOARD_NAME="qemu-coreboot-fbwhiptail-tpm2-hotp"

# Use the GPG-injected ROM if a key was given, since we can't reflash a GPG
# keyring in QEMU.  Otherwise use the plain ROM, some things can still be tested
# that way without a GPG key.
ifneq "$(PUBKEY_ASC)" ""
QEMU_BOOT_ROM := $(build)/$(BOARD)/$(CB_OUTPUT_FILE_GPG_INJ)
else
QEMU_BOOT_ROM := $(build)/$(BOARD)/$(CB_OUTPUT_FILE)
endif

#borrowed from https://github.com/orangecms/webboot/blob/boot-via-qemu/run-webboot.sh
TPMDIR=$(build)/$(BOARD)/vtpm
$(TPMDIR)/.manufacture:
	mkdir -p "$(TPMDIR)"
	swtpm_setup --create-config-files skip-if-exist
	swtpm_setup --tpm-state "$(TPMDIR)" --create-platform-cert --lock-nvram --tpm2
	touch "$(TPMDIR)/.manufacture"
ROOT_DISK_IMG=$(build)/$(BOARD)/root.qcow2
# Default to 20G disk
QEMU_DISK_SIZE?=20G
$(ROOT_DISK_IMG):
	qemu-img create -f qcow2 "$(ROOT_DISK_IMG)" $(QEMU_DISK_SIZE)
# Remember the amount of memory so it doesn't have to be specified every time.
# Default to 4G, most bootable OSes are not usable with less.
QEMU_MEMORY_SIZE?=4G
MEMORY_SIZE_FILE=$(build)/$(BOARD)/memory
$(MEMORY_SIZE_FILE):
	@echo "$(QEMU_MEMORY_SIZE)" >"$(MEMORY_SIZE_FILE)"
USB_FD_IMG=$(build)/$(BOARD)/usb_fd.raw
$(USB_FD_IMG):
	dd if=/dev/zero bs=1M of="$(USB_FD_IMG)" bs=1M count=128
	# Debian obnoxiously does not include /usr/sbin in PATH for non-root, even
	# though it is meaningful to use mkfs.vfat (etc.) as non-root
	MKFS_VFAT=mkfs.vfat; \
	[ -x /usr/sbin/mkfs.vfat ] && MKFS_VFAT=/usr/sbin/mkfs.vfat; \
	"$$MKFS_VFAT" "$(USB_FD_IMG)"
# Pass INSTALL_IMG=<path_to_img.iso> to attach an installer as a USB flash drive instead
# of the temporary flash drive for exporting GPG keys.
ifneq "$(INSTALL_IMG)" ""
QEMU_USB_FD_IMG := $(INSTALL_IMG)
else
QEMU_USB_FD_IMG := $(USB_FD_IMG)
endif
# To forward a USB token, set USB_TOKEN to one of the following:
# - NitrokeyPro - forwards a Nitrokey Pro by VID:PID
# - LibremKey - forwards a Librem Key by VID:PID
# - <other> - Provide the QEMU usb-host parameters, such as
#   'hostbus=<#>,hostport=<#>' or 'vendorid=<#>,productid=<#>'
ifeq "$(USB_TOKEN)" "NitrokeyPro"
QEMU_USB_TOKEN_DEV := -device usb-host,vendorid=8352,productid=16648
else ifeq "$(USB_TOKEN)" "NitrokeyStorage"
QEMU_USB_TOKEN_DEV := -device usb-host,vendorid=8352,productid=16649
else ifeq "$(USB_TOKEN)" "Nitrokey3NFC"
QEMU_USB_TOKEN_DEV := -device usb-host,vendorid=8352,productid=17074
else ifeq "$(USB_TOKEN)" "LibremKey"
QEMU_USB_TOKEN_DEV := -device usb-host,vendorid=12653,productid=19531
else ifneq "$(USB_TOKEN)" ""
QEMU_USB_TOKEN_DEV := -device "usb-host,$(USB_TOKEN)"
endif

run: $(TPMDIR)/.manufacture $(ROOT_DISK_IMG) $(MEMORY_SIZE_FILE) $(USB_FD_IMG)
	swtpm socket \
		--tpm2 \
		--tpmstate dir="$(TPMDIR)" \
		--flags "startup-clear" \
		--terminate \
		--ctrl type=unixio,path="$(TPMDIR)/sock" &
	sleep 0.5

	-qemu-system-x86_64 -drive file="$(ROOT_DISK_IMG)",if=virtio \
		--machine q35,accel=kvm:tcg \
		-rtc base=utc \
		-smp "$$(nproc)" \
		-vga virtio \
		-full-screen \
		-m "$$(cat "$(MEMORY_SIZE_FILE)")" \
		-serial stdio \
		--bios "$(QEMU_BOOT_ROM)" \
		-object rng-random,filename=/dev/urandom,id=rng0 \
		-device virtio-rng-pci,rng=rng0 \
		-netdev user,id=u1 -device e1000,netdev=u1 \
		-chardev socket,id=chrtpm,path="$(TPMDIR)/sock" \
		-tpmdev emulator,id=tpm0,chardev=chrtpm \
		-device tpm-tis,tpmdev=tpm0 \
		-device qemu-xhci,id=usb \
		-device usb-tablet \
		-drive file="$(QEMU_USB_FD_IMG)",if=none,id=usb-fd-drive,format=raw \
		-device usb-storage,bus=usb.0,drive=usb-fd-drive \
		$(QEMU_USB_TOKEN_DEV) \

	stty sane
	@echo