*Disclaimer*: This is not an easy: mistakes can lead to data loss or bricking of the laptop. Only execute command that you are able to understand. *Note*: This guide suggest installing Qubes before flashing coreboot. If you already have coreboot refer to this instead http://dodoid.net/qubreboot/ # Qubes+Coreboot on Thinkpad X220 ## Prerequisites * Thinkpad x220 (other models supported by coreboot may apply) * Pomona 5250 + RaspberryPI/BeagleBone black for hardware flashing ## Advantages: * Encrypted /boot * Less proprietary components in bios * Neutralized Intel ME * Evil Maid Attacks requires hardware flashing/partial disassembly ## Disadvantages: * TPM can't work without the Intel ME * Not all RAM sticks works * Different (probably worse) fan control * Microcode updates probably working but not yet tested Final qubes-hcl-report ``` Qubes release 4.0 (R4.0) Brand: LENOVO Model: 429136G BIOS: CBET4000 4.7-577-gd18f42ab6f Xen: 4.8.3 Kernel: 4.14.18-1 RAM: 12208 Mb CPU: Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz Chipset: Intel Corporation 2nd Generation Core Processor Family DRAM Controller [8086:0104] (rev 09) VGA: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0106] (rev 09) (prog-if 00 [VGA controller]) Net: Intel Corporation 82579LM Gigabit Network Connection (Lewisville) (rev 05) Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34) SCSI: Crucial_CT240M50 Rev: MU03 HVM: Active I/O MMU: Active HAP/SLAT: Yes TPM: Device present Remapping: Yes ``` # Procedure ## Install Qubes Do a simple Qubes 4 LUKS+LVM installation by just following the graphical installer. ## Coreboot prerequisites Clone the base Qubes debian8/9 template and install the following packages: ``` sudo apt-get install git wget build-essential gnat flex bison libncurses5-dev zlib1g-dev libfreetype6-dev unifont python3 sudo apt-get build-dep grub ``` If required enable the necessary source repository. Create an AppVM based on the template and start a terminal in it. ``` mkdir ~/Build cd ~/Build git clone https://notabug.org/Velsoth/x220-coreboot.git cd x220-coreboot/ ./cb-helper download_code ./cb-helper build_utils ``` ## Get the original bios binary If you are able to extract it from the executable distributed by Lenovo it should be good. Do not get it from some random forum or website. If you can't the best way is to read it directly from the flash using the Raspberry and the clip. ``` ______ 1--| O |--8 2--| |--7 3--| |--6 4--|______|--5 ``` Remeber to research your chip model and manufacturer (in this guide a Macronix MX25L6405) and double check the pin layout using the official datasheet. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Flash pin number | |----|----|-----|-----|----|-----|-------|-----|------------------| | CS | DO | /WP | GND | DI | CLK | /HOLD | VCC | Pin name | | 24 | 21 | GND | 25 | 19 | 23 | GND | 17 | Rpi GPIO number | Please refer to the multiple flashing guides available * https://www.flashrom.org/RaspberryPi * https://libreboot.org/docs/install/rpi_setup.html * https://karlcordes.com/coreboot-x220/ * https://tylercipriani.com/blog/2016/11/13/coreboot-on-the-thinkpad-x220-with-a-raspberry-pi/ * https://github.com/bibanon/Coreboot-ThinkPads/wiki/Hardware-Flashing-with-Raspberry-Pi From a root prompt on the Rpi ``` flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=1000 -r bios1.bin flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=1000 -r bios2.bin flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=1000 -r bios3.bin sha1sum bios*.bin ``` Check that all the checksums do match. In case they don't there's probably something wrong in the clip position or in the wiring. Remember that no pin should left floating even if it's not useful for the operation. /WP and /HOLD should be always connected to something like GND. ## Continue with coreboot build Now reassemble the x220, boot Qubes and copy bios1.bin from the RaspberryPi to the AppVM created before in `~/Build/x220-coreboot/binaries/bios.bin`. Open again a terminal in the AppVM: ``` cd ~/Build/x220-coreboot/ ./cb-helper split_bios ./cb-helper neuter_me ./cb-helper pre_build_coreboot ``` Now the `cb-helper` script is prepared to build coreboot with SeaBIOS as primary payload and Grub2 as a secondary payload. In this specific guide we do not use SeaBIOS and directly use Grub2 as a primary payload. This is an advantage for some reasons: * Faster boot * Less code running And a disadvantage for some others: * No BIOS like configuration available * Probable problems with other operating systems * Missing utilities like nvramcui Now edit grub.cfg `~/Build/x220/coreboot/config/grub.cfg` Replace at the beginning of the file ``` set prefix=(memdisk)/boot/grub insmod nativedisk insmod ehci insmod ohci insmod uhci insmod usb insmod usbms insmod part_msdos insmod ext2 insmod lvm insmod gcry_rijndael insmod gcry_sha256 insmod luks insmod cryptodisk # insmod usbserial_pl2303 # insmod usbserial_ftdi # insmod usbserial_usbdebug insmod gfxmenu insmod gfxterm_menu insmod gfxterm_background insmod chain insmod jpeg # Serial and keyboard configuration, very important. # serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1 # terminal_input --append serial # terminal_output --append serial terminal_input --append at_keyboard terminal_output --append cbmemc gfxpayload=keep terminal_output --append gfxterm set menu_color_normal=white/black set menu_color_highlight=white/cyan # Default to first option, automatically boot after 1 second set default="0>0" set timeout=1 # This is useful when using 'cat' on long files on GRUB terminal set pager=1 # Set a background image from CBFS background_image (cbfsdisk)/background.jpg # Set DejaVu Sans Mono as the default font loadfont (cbfsdisk)/dejavusansmono.pf2 # Default keymap keymap usqwerty ``` And add the following menuentry: ** THIS IS AN EXAMPLE YOU SHOULD GET IT FROM YOUR ORIGINAL grub.cfg WITH YOUR DISK UUID AND KERNEL VERSIONS ** ``` menuentry 'Qubes, with Xen hypervisor FDE' --class qubes --class gnu-linux --class gnu --class os --class xen $menuentry_id_option 'xen-gnulinux-simple-1c874f0f-b41d-4120-8058-b327554c11bf' { cryptomount -a set root='lvm/qubes_dom0-boot' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1' 55e7e06a-cad4-4a8d-ba89-9205493e87d7 else search --no-floppy --fs-uuid --set=root 55e7e06a-cad4-4a8d-ba89-9205493e87d7 fi echo 'Loading Xen 4.8.3 ...' if [ "$grub_platform" = "pc" -o "$grub_platform" = "" ]; then xen_rm_opts= else xen_rm_opts="no-real-mode edd=off" fi multiboot /xen-4.8.3.gz placeholder console=none dom0_mem=min:1024M dom0_mem=max:4096M iommu=no-igfx ${xen_rm_opts} echo 'Loading Linux 4.14.18-1.pvops.qubes.x86_64 ...' module /vmlinuz-4.14.18-1.pvops.qubes.x86_64 placeholder root=/dev/mapper/qubes_dom0-root ro rd.luks.uuid=luks-8453f049-6322-4e5d-b05a-a6c4688fd3a5 rd.lvm.lv=qubes_dom0/root rd.lvm.lv=qubes_dom0/swap i915.preliminary_hw_support=1 rhgb quiet rd.qubes.hide_all_usb echo 'Loading initial ramdisk ...' module --nounzip /initramfs-4.14.18-1.pvops.qubes.x86_64.img } ``` The only difference with the original is the addition of * cryptomount -a * set root='lvm/qubes_dom0-boot' The below example of .config should work without any modification given that the steps above have been done correctly, however some configurations depends on personal needs and should be changed. Refer to the coreboot wiki for more information https://www.coreboot.org/Coreboot_Options `~/Build/x220-coreboot/coreboot/.config` ``` CONFIG_COREBOOT_BUILD=y CONFIG_LOCALVERSION="" CONFIG_CBFS_PREFIX="fallback" CONFIG_COMPILER_GCC=y CONFIG_COMPRESS_RAMSTAGE=y CONFIG_INCLUDE_CONFIG_FILE=y CONFIG_USE_BLOBS=y CONFIG_RELOCATABLE_RAMSTAGE=y CONFIG_VENDOR_LENOVO=y CONFIG_BOARD_SPECIFIC_OPTIONS=y CONFIG_MAINBOARD_DIR="lenovo/x220" CONFIG_MAINBOARD_PART_NUMBER="ThinkPad X220" CONFIG_MAINBOARD_VENDOR="LENOVO" CONFIG_MAX_CPUS=8 CONFIG_CACHE_ROM_SIZE_OVERRIDE=0x0 CONFIG_CBFS_SIZE=0x200000 CONFIG_VGA_BIOS_ID="8086,0126" CONFIG_DIMM_SPD_SIZE=256 CONFIG_DCACHE_RAM_BASE=0xfefe0000 CONFIG_DCACHE_RAM_SIZE=0x20000 CONFIG_VGA_BIOS_FILE="pci8086,0126.rom" CONFIG_MAINBOARD_PCI_SUBSYSTEM_VENDOR_ID=0x17aa CONFIG_MAINBOARD_PCI_SUBSYSTEM_DEVICE_ID=0x21db CONFIG_HAVE_IFD_BIN=y CONFIG_HAVE_ME_BIN=y CONFIG_DRAM_RESET_GATE_GPIO=10 CONFIG_DEVICETREE="devicetree.cb" CONFIG_MAX_REBOOT_CNT=3 CONFIG_HAVE_GBE_BIN=y CONFIG_USBDEBUG_HCD_INDEX=2 CONFIG_MMCONF_BASE_ADDRESS=0xf0000000 CONFIG_TPM_PIRQ=0x0 CONFIG_BOOT_DEVICE_SPI_FLASH_BUS=0 CONFIG_FMDFILE="" CONFIG_PRERAM_CBMEM_CONSOLE_SIZE=0xc00 CONFIG_IFD_BIN_PATH="../binaries/descriptor.bin" CONFIG_ME_BIN_PATH="../binaries/me_neutered.bin" CONFIG_BOARD_LENOVO_X220=y CONFIG_CPU_ADDR_BITS=36 CONFIG_DEFAULT_CONSOLE_LOGLEVEL=8 CONFIG_DRIVERS_PS2_KEYBOARD=y CONFIG_SMBIOS_ENCLOSURE_TYPE=0x09 CONFIG_BOARD_ROMSIZE_KB_8192=y CONFIG_COREBOOT_ROMSIZE_KB_8192=y CONFIG_COREBOOT_ROMSIZE_KB=8192 CONFIG_ROM_SIZE=0x800000 CONFIG_SYSTEM_TYPE_LAPTOP=y CONFIG_CPU_SPECIFIC_OPTIONS=y CONFIG_RAMTOP=0x200000 CONFIG_HEAP_SIZE=0x4000 CONFIG_RAMBASE=0x100000 CONFIG_EHCI_BAR=0xfef00000 CONFIG_SERIRQ_CONTINUOUS_MODE=y CONFIG_SMM_TSEG_SIZE=0x800000 CONFIG_ACPI_CPU_STRING="\\_PR.CP%02d" CONFIG_BOOTBLOCK_CPU_INIT="cpu/intel/model_206ax/bootblock.c" CONFIG_C_ENV_BOOTBLOCK_SIZE=0x10000 CONFIG_X86_TOP4G_BOOTMEDIA_MAP=y CONFIG_ROMSTAGE_ADDR=0x2000000 CONFIG_VERSTAGE_ADDR=0x2000000 CONFIG_SPI_FLASH_INCLUDE_ALL_DRIVERS=y CONFIG_DCACHE_RAM_MRC_VAR_SIZE=0x0 CONFIG_PCIEXP_ASPM=y CONFIG_PCIEXP_COMMON_CLOCK=y CONFIG_BOOTBLOCK_NORTHBRIDGE_INIT="northbridge/intel/sandybridge/bootblock.c" CONFIG_BOOTBLOCK_SOUTHBRIDGE_INIT="southbridge/intel/bd82x6x/bootblock.c" CONFIG_CACHE_MRC_SIZE_KB=512 CONFIG_STACK_SIZE=0x1000 CONFIG_UART_PCI_ADDR=0x0 CONFIG_SOCKET_SPECIFIC_OPTIONS=y CONFIG_XIP_ROM_SIZE=0x20000 CONFIG_NUM_IPI_STARTS=2 CONFIG_CPU_INTEL_MODEL_206AX=y CONFIG_SSE2=y CONFIG_CPU_INTEL_SOCKET_RPGA989=y CONFIG_CPU_INTEL_COMMON=y CONFIG_ENABLE_VMX=y CONFIG_UDELAY_TSC=y CONFIG_TSC_CONSTANT_RATE=y CONFIG_TSC_MONOTONIC_TIMER=y CONFIG_TSC_SYNC_MFENCE=y CONFIG_LOGICAL_CPUS=y CONFIG_SMM_TSEG=y CONFIG_SMM_MODULE_HEAP_SIZE=0x4000 CONFIG_CACHE_AS_RAM=y CONFIG_SMP=y CONFIG_AP_SIPI_VECTOR=0xfffff000 CONFIG_MMX=y CONFIG_SSE=y CONFIG_SUPPORT_CPU_UCODE_IN_CBFS=y CONFIG_CPU_MICROCODE_CBFS_NONE=y CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE=y CONFIG_USE_NATIVE_RAMINIT=y CONFIG_SANDYBRIDGE_IVYBRIDGE_LVDS=y CONFIG_IF_NATIVE_VGA_INIT=y CONFIG_HPET_ADDRESS=0xfed00000 CONFIG_HPET_MIN_TICKS=0x80 CONFIG_MAX_PIRQ_LINKS=4 CONFIG_SOUTHBRIDGE_INTEL_C216=y CONFIG_SOUTH_BRIDGE_OPTIONS=y CONFIG_LOCK_SPI_FLASH_NONE=y CONFIG_SOUTHBRIDGE_INTEL_COMMON=y CONFIG_SOUTHBRIDGE_INTEL_COMMON_GPIO=y CONFIG_SOUTHBRIDGE_INTEL_COMMON_SMBUS=y CONFIG_SOUTHBRIDGE_INTEL_COMMON_SPI=y CONFIG_SOUTHBRIDGE_INTEL_COMMON_PIRQ_ACPI_GEN=y CONFIG_SOUTHBRIDGE_INTEL_COMMON_RCBA_PIRQ=y CONFIG_HAVE_INTEL_CHIPSET_LOCKDOWN=y CONFIG_INTEL_CHIPSET_LOCKDOWN=y CONFIG_EC_ACPI=y CONFIG_EC_LENOVO_H8=y CONFIG_H8_BEEP_ON_DEATH=y CONFIG_H8_FLASH_LEDS_ON_DEATH=y CONFIG_EC_LENOVO_PMH7=y CONFIG_HAVE_INTEL_FIRMWARE=y CONFIG_CHECK_ME=y CONFIG_GBE_BIN_PATH="../binaries/gbe.bin" CONFIG_UDK_2013_VERSION=2013 CONFIG_UDK_2015_VERSION=2015 CONFIG_UDK_2017_VERSION=2017 CONFIG_UDK_VERSION=2013 CONFIG_ARCH_ARMV8_EXTENSION=0 CONFIG_ARCH_X86=y CONFIG_ARCH_BOOTBLOCK_X86_32=y CONFIG_ARCH_VERSTAGE_X86_32=y CONFIG_ARCH_ROMSTAGE_X86_32=y CONFIG_ARCH_RAMSTAGE_X86_32=y CONFIG_PC80_SYSTEM=y CONFIG_HAVE_CMOS_DEFAULT=y CONFIG_CMOS_DEFAULT_FILE="src/mainboard/$(MAINBOARDDIR)/cmos.default" CONFIG_IOAPIC_INTERRUPTS_ON_FSB=y CONFIG_ID_SECTION_OFFSET=0x80 CONFIG_BOOTBLOCK_SIMPLE=y CONFIG_BOOTBLOCK_SOURCE="bootblock_simple.c" CONFIG_HAVE_VGA_TEXT_FRAMEBUFFER=y CONFIG_HAVE_LINEAR_FRAMEBUFFER=y CONFIG_MAINBOARD_HAS_NATIVE_VGA_INIT=y CONFIG_MAINBOARD_HAS_LIBGFXINIT=y CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT=y CONFIG_GENERIC_LINEAR_FRAMEBUFFER=y CONFIG_LINEAR_FRAMEBUFFER=y CONFIG_PCI=y CONFIG_MMCONF_SUPPORT=y CONFIG_PCIX_PLUGIN_SUPPORT=y CONFIG_CARDBUS_PLUGIN_SUPPORT=y CONFIG_PCIEXP_PLUGIN_SUPPORT=y CONFIG_SUBSYSTEM_VENDOR_ID=0x0000 CONFIG_SUBSYSTEM_DEVICE_ID=0x0000 CONFIG_CACHE_MRC_SETTINGS=y CONFIG_MRC_SETTINGS_CACHE_SIZE=0x10000 CONFIG_SPI_FLASH=y CONFIG_BOOT_DEVICE_SPI_FLASH_RW_NOMMAP=y CONFIG_SPI_FLASH_ADESTO=y CONFIG_SPI_FLASH_AMIC=y CONFIG_SPI_FLASH_ATMEL=y CONFIG_SPI_FLASH_EON=y CONFIG_SPI_FLASH_GIGADEVICE=y CONFIG_SPI_FLASH_MACRONIX=y CONFIG_SPI_FLASH_SPANSION=y CONFIG_SPI_FLASH_SST=y CONFIG_SPI_FLASH_STMICRO=y CONFIG_SPI_FLASH_WINBOND=y CONFIG_NO_UART_ON_SUPERIO=y CONFIG_HAVE_USBDEBUG=y CONFIG_HAVE_USBDEBUG_OPTIONS=y CONFIG_SMBIOS_PROVIDED_BY_MOBO=y CONFIG_INTEL_EDID=y CONFIG_INTEL_INT15=y CONFIG_INTEL_GMA_ACPI=y CONFIG_GFX_GMA=y CONFIG_GFX_GMA_CPU="Sandybridge" CONFIG_GFX_GMA_CPU_VARIANT="Normal" CONFIG_GFX_GMA_INTERNAL_IS_LVDS=y CONFIG_GFX_GMA_INTERNAL_PORT="LVDS" CONFIG_GFX_GMA_ANALOG_I2C_PORT="PCH_DAC" CONFIG_DRIVERS_INTEL_WIFI=y CONFIG_DRIVERS_MC146818=y CONFIG_LPC_TPM=y CONFIG_TPM_TIS_BASE_ADDRESS=0xfed40000 CONFIG_VGA=y CONFIG_DRIVERS_RICOH_RCE822=y CONFIG_MAINBOARD_HAS_LPC_TPM=y CONFIG_ACPI_SATA_GENERATOR=y CONFIG_ACPI_INTEL_HARDWARE_SLEEP_VALUES=y CONFIG_BOOT_DEVICE_SPI_FLASH=y CONFIG_BOOT_DEVICE_MEMORY_MAPPED=y CONFIG_RTC=y CONFIG_SQUELCH_EARLY_SMP=y CONFIG_DEFAULT_CONSOLE_LOGLEVEL_8=y CONFIG_CONSOLE_POST=y CONFIG_HWBASE_DEBUG_CB=y CONFIG_HAVE_ACPI_RESUME=y CONFIG_RESUME_PATH_SAME_AS_BOOT=y CONFIG_HAVE_HARD_RESET=y CONFIG_HAVE_MONOTONIC_TIMER=y CONFIG_HAVE_OPTION_TABLE=y CONFIG_HAVE_SMI_HANDLER=y CONFIG_IOAPIC=y CONFIG_USE_WATCHDOG_ON_BOOT=y CONFIG_HAVE_ACPI_TABLES=y CONFIG_COMMON_FADT=y CONFIG_GENERATE_SMBIOS_TABLES=y CONFIG_PAYLOAD_GRUB2=y CONFIG_PAYLOAD_FILE="payloads/external/GRUB2/grub2/build/default_payload.elf" CONFIG_GRUB2_STABLE=y CONFIG_GRUB2_EXTRA_MODULES="gcry_rijndael gcry_sha256 gcry_seed lvm luks cryptodisk all_video jpeg png cat videoinfo videotest crypto gfxmenu gfxterm_menu gfxterm_background password password_pbkdf2 pbkdf2 usbserial_pl2303 usbserial_ftdi usbserial_usbdebug" CONFIG_GRUB2_INCLUDE_RUNTIME_CONFIG_FILE=y CONFIG_GRUB2_RUNTIME_CONFIG_FILE="../config/grub.cfg" CONFIG_PAYLOAD_OPTIONS="" CONFIG_COMPRESSED_PAYLOAD_LZMA=y CONFIG_COMPRESS_SECONDARY_PAYLOAD=y CONFIG_HAVE_DEBUG_RAM_SETUP=y CONFIG_HAVE_DEBUG_SMBUS=y CONFIG_WARNINGS_ARE_ERRORS=y CONFIG_EARLY_CBMEM_INIT=y CONFIG_RELOCATABLE_MODULES=y CONFIG_BOOTBLOCK_CUSTOM=y ``` Now build coreboot ``` ./cb-helper build_coreboot ``` And add the font and tha background image: ``` coreboot/util/cbfstool/cbfstool out/coreboot.rom add -f misc/dejavusansmono.pf2 -n dejavusansmono.pf2 -t raw coreboot/util/cbfstool/cbfstool out/coreboot.rom add -f misc/bg.jpg -n background.jpg -t raw ``` The file `~/Build/x220-coreboot/out/coreboot.rom` should now be ready for flashing. ## Coreboot flash From the RaspberryPi ``` flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=1000 -w coreboot.rom ``` (flashrom may sometimes give an error about failing to erase. This is fine as long as the end it prints 'VERIFIED') Or from dom0 if you already have flashed coreboot before: ``` sudo flashrom -p internal:laptop=force_I_want_a_brick -w coreboot.rom ``` ## Encrypt /boot From now on keep in mind that any error may cause data loss. Even not doing any error may cause data loss. Please make a full backup bedofre going on. Boot a live archlinux or any other live distro which has `cryptsetup`, `lvm` and `dd` installed. In this part it is assumed the device with Qubes is `/dev/sda`. ``` fdisk -l /dev/sda Device Boot Start End Sectors Size Id Type /dev/sda1 2048 2099199 2097151 1.0 G 83 Linux /dev/sda2 2099200 468862127 466762927 222.6G 83 Linux ``` Take note of the offset values. Copy on an external device a backup of the boot partition: ``` dd if=/dev/sda1 of=/mnt/backup/boot.dd bs=1M status=progress ``` Using fdisk, cfdisk or parted delete both `sda1` and `sda2` and create a new partition using the whole disk called `sda`. Now move the old LUKS partition at the beginning of the disk. First check that the offsets are correct (source: https://superuser.com/questions/541067/how-to-move-a-partition-in-gnu-linux): ``` dd conv=notrunc bs=512 iflag=fullblock if=/dev/sda1 count=100 skip=$((2099199-2048)) seek=0 2> /dev/null | file -s - /dev/stdin: LUKS encrypted file, ver 1 [aes, xts-plain64, sha256] UUID: 8453f049-6322-4e5d-b05a-a6c4688fd3a5 ``` If the `file` command detect a LUKS encrypted file it should be safe to continue. ``` dd conv=notrunc bs=512 iflag=fullblock if=/dev/sda1 skip=$((2099199-2048)) seek=0 of=/dev/sda1 status=progress ``` Wait for the process to complete. Do not stop it for any reason. ``` cryptsetup luksOpen /dev/sda1 qubespv pvresize /dev/mapper/qubespv lvcreate -n boot -l100%FREE qubes_dom0 dd if=/mnt/backup/bios.dd of /dev/mapper/qubes_dom0-boot ``` ## Reboot Reboot. You should now be prompted two times for your LUKS passphrase: this is because the Grub installed within the Flash has no way to pass the actual passphrase to the kernel. A workaround to this issue is explained here https://wiki.parabola.nu/Installing_Parabola_on_Libreboot_with_full_disk_encryption_(including_/boot)#Bonus:_Using_a_key_file_to_unlock_.2Fboot.2F # TODO * Flash coreboot read-only to prevent tampering * Add a script which symlink the latest kernel and the previous one in a predictable path in /boot * Find a way to disable ExpressCard/Camera/Other components from coreboot * Test microcode updates for meltdown/spectre