- xx30 legacy boards (x230, x230-flash, t430, t430-flash) now rely also on coreboot 4.13
- DOWNSIDE: x230 and t430 legacy boards now rely on WHIPTAIL (NOT FBWhiptail) to have enough space to fit under 7mb)
- xx20 boards moved to 4.13 (no need of xx20-flash boards here since single SPI boards with 7.5mb useable since blobs scripts are required)
- DOWNSIDE: all xx20 boards now have dropbear deactivated, while still having ethernet driver in.
- qemu-coreboot and qemu-coreboot-fbwhiptail switched to coreboot 4.13 WITHOUT TPM SUPPORT (with cryptsetup 2.x support)
- DOWNSIDE:
- coreboot-qemu board CBFS_SIZE=0x700000 -> 0x750000
- coreboot-qemu-fbwhiptail CBFS_SIZE=0x750000 -> 0x780000
- CircleCi build recipe removes 4.8.1 boards altogether
- KGPE-D16 workstation is used as new base build to save workspace layer (we removed one workspace layer)
- Removing one workspace layer will save approx 2 hours of build time on fresh builds
- Removing one coreboot version will save us approx 2 hours of build time on fresh builds
- KGPE-D16 will stay to coreboot 4.11 until forward notice.
- All other board configs SHOULD be built on latest coreboot versions
- all: coreboot NO_POST for all boards
- all: coreboot NO_GFX_INIT (linux payload does the graphic init)
- all: coreboot TPM_MEASURED_BOOT (no more patches under Heads for measured boot)
- all: coreboot DRIVERS_PS2_KEYBOARD (fixes no keyboard on soft reboot and potentially xx30t xx20t fix for random raw keyboard (to be tested)
- all: coreboot removal of DEFAULT_CONSOLE_LOGLEVEL_5 under some boards
- all: coreboot removal of "loglevel=3" under some linux command line options booting Heads kernel
- all: coreboot removal of DEBUG_SMM_RELOCATION (unneeded)
- all: coreboot INCLUDE_CONFIG_FILE and COLLECT_TIMESTAMPS for all boards
- all: coreboot CONSOLE_SERIAL present on all boards
- all: coreboot add VBT
- all: board configs switch to cryptsetup2
xx20 hotp-maximized boards:
- removal of dropbear (not enough space to have htop + dropbear)
txx0 boards coreboot:
- USE_OPTION_TABLE and STATIC_OPTION_TABLE added (todo: check T430 boards optimization and find issue/PR and ammend this commit)
Added note to KGPE-D16 configs about the current microcode bug, why microcode is not included and encouraging AMD Opteron 6300 series users to make sure their operating system loads microcode.
* xx30-*-maximized: update flashrom options removing --ifd bios option, keeping whole flash of rom internally. WARNING: ifd needs to be initially unlocked through ifdtool -u on 8mb bottom SPI backup. YOU CANNOT COME FROM 1VYRAIN. IF COMING FROM SKULLS, YOU MUST HAVE RAN OPTIONAL -u OPTION FROM SKULLS. PLEASE UPGRADE ONLY AFTER HAVING A PHYSICAL BACKUP OF BOTH SPI FLASH CHIPS. MORE INFORMATION UNDER https://github.com/osresearch/heads/pull/703. This will guarantee that future flash of produced rom will reflash the ROM totally, where heads make sure of adding users customizations (public key, /etc/config.user) when internally flashed. Unfortunately, if you flash externally, you will have to reinject your public key and readd /etc/config customizations.
* Adding generated bincfg coreboot 4.8.1 patch (merged under coreboot 4.13 and backported here to 4.8.1), resulting in gbe.bin under blobs/xx30/gbe.bin and instructions to replicate in README prior of automation (under repo). Note that MAC under gbe.bin is fixed to DE:AD:C0:FF:EE unless extract.sh script is ran on external backup to keep current user's MAC (Thanks to @Thrilleratplay's contribution!)
* xx30 blobs: add two blobs management scripts for xx30: extract from local backup/download+neuter ME
extract.sh: extract from external backup: gbe.bin, neuter under me.bin and maximize BIOS+reduce ME regions under unlocked ifd.bin.
download_clean_me.sh: download and verify Lenovo latest ME version from website, and drop me.bin in place.
Note: me.bin is 98kb, containing only BUP and ROMP partitions which cannot be modified nor deleted else computer won't boot. As a result, BIOS region is maximized in ifd.bin to 11.5mb and coreboot config takes advantage of that freed space.
* CircleCI: xx30-*-maximized additional step to call download_clean_me.sh prior of building boards so that me.bin is dopped in place. This should be done by users prior of building xx30-*-maximized boards locally, which is imitated in CircleCI builds (look at .circleci/config.yaml for innoextract host added dependency and board buildings. Results on github for each commit).
cp config/linux.. ./build/linux*/.config
cd build/linux*
make savedefconfig
cp defconfig ../../config/linux..
Resulting in only linux-kgpe-d16_workstation.config being updated.
For KGPE-D16 workstation boards:
Remove `console=tty0` from `CONFIG_BOOT_KERNEL_ADD` as was blocking Qubes graphical installer (CLI installer was launched).
Comment out `export CONFIG_BOOT_KERNEL_REMOVE="plymouth.ignore-serial-consoles"` to provide a more desktop like experience.
Removed 0001-cpu-x86-smm-Use-PRIxPTR-to-print-uintptr_t.patch as already exists as 0000-cpu-x86-smm-Use-PRIxPTR-to-print-uintptr_t.patch
Added 0020-kgpe-d16_measured-boot-support.patch for coreboot 4.11
Fix TPM errors when microcode is measured by initialising TPM earlier and loading the microcode later.
Thanks to Michał Żygowski <miczyg1> for condition suggestion: `if (CONFIG(MEASURED_BOOT) && CONFIG(LPC_TPM) && boot_cpu())`
Locate bootblock location and size with CBFS API. Credit to: Michał Żygowski <miczyg1>
Bring patches/coreboot-4.11 on par with master
Removed patches/coreboot-4.11/0020-kgpe-d16-vboot.patch
Removed Vboot options from KGPE-D16 coreboot configs
Enabled TPM in kgpe-d16 board configs
Enabled measured boot in kgpe-d16 coreboot configs.
Added support for video cards that require nouveau, radeon and amdgpu drivers in linux-kgpe-d16_workstation.config
`nouveau.config=NvForcePost=1` to be added to kexec'd kernels for better Nvidia card support.
Changing CONFIG_USB_BOOT_DEV to sdc1, adding back CONFIG_BOOT_STATIC_IP to 192.168.2.3, adding dual console to OpenBMC and tty0 in attempt to have QubesOS graphic installer which complains with no networking when attempting to start VNC
Adding dual console to OpenBmc and tty0
putting kgpe-d16-coreboot.conf in defconfig format
NO_HZ wasn't included in kernel config. Adding it.
Wasn't able to have both console firing up QubesOS gui installer, complaining about hvc1 console errors. Splitting up Workstation and server config. This one works for Worstation
Removing serial configuration and static IP stuff since we have a workstation here.
Seperate Workstation and Server board configurations until dual console truely works through QubesOS gui installation. kgpe-d16 board config removed until then.
Placing files in good directories
Corrrect flashrom options for kgpe-d16 server and workstation boards
kgpe-d16 linux: NO_HZ_IDLE instead of NO_HZ
kgpe-d16: seperate board for workstation to be AST and gui-init based, while kgpe-d16-> kgpe-d16_server
kgpe-d16_server: boots, shows ASpeed text on VGA, controllable through BMC via SSH.
kgpe-d16_workstation on ASpeed console. WIP. (Includes CIs configs to build server and workstation)
kgpe-d16_workstation in defconfig format
kgpe-d16 boards: pass from GPG to GPG2 board definitions
kgpe-d16_workstation : Adding Cairo and FbWhpitail in board config for gui-init to work in FB mode
kgpe-d16: removing plymouth.ignore-serial-consoles to fix server terminal output
kgpe-d16: bring par with staging branch https://gitlab.com/tlaurion/heads/commits/kgpe-d16_staging
kgpe-d16 : expressively export CONFIG_TPM=n
kgpe-d16_wokstation gui-init variables were missing
kgpe-d16 boards: add CONFIG_LINUX_USB_COMPANION_CONTROLLER so that usb is recognized
linux-kgpe-d16*: add support for Pike
kgpe-d16_workstation-usb_keyboard board support addition
kgpe-d16_server-whiptail: Add board and dependencies to have gui-init in whiptail (console mode, not FbWhiptail based
GitlabCI: kgpe-d16 fixes and upstream merge of change
kgpe-d16* board: add statement to fixate coreboot version to 4.8.1 for the moment
kgpe-d16: add missing config/linux-kgpe-d16_server-whiptail.config file
KGPE-D16: community work migration to coreboot 4.11 to fix issue #740
KGPE-D16 boards: Adding VBOOT+measured boot, musl-cross patch and 4.11 patch brought up per https://github.com/osresearch/heads/pull/709
kgpe-d16* boards: add VBOOT Kconfig patch per @miczyg1 recommendation under https://github.com/osresearch/heads/pull/795#issuecomment-671214637
KGPE-D16* coreboot configs: Add S3NV as a Runtime data whitelist (so that it is not measured at term) per @miczyg1 recommendation under https://github.com/osresearch/heads/pull/795#issuecomment-671214637
kgpe-d16 coreboot 4.11: add https://review.coreboot.org/c/coreboot/+/36908 patch
kgpe-d16 boards: add Linux kernel version where missing.
CircleCI: Add debug output on fail for kgpe-d16 board builds to bring par with upstream after rebasing on master
coreboot module: typo correction (tabs vs spaces)
CircleCI: trying to address "g++: fatal error: Killed signal terminated program cc1plus." happening under coreboot 4.11 and coreboot 4.12 builds
CircleCI: remove past addition to test recommendation from CircleCI: "resource_class: large"
CircleCi: Ok.... lets output dmesg content prior of other logs.... I'm out of ideas. Next step, ask CircleCI for support
At this stage:
- job's "make --load" is supposed to guarantee that the number of thread doesn't exhaust pass of a load of 2 (medium, free class, CircleCI has 32 cores so possibility of a load of 32)
- "--max_old_space_size=4096" in CircleCI environement is supposed to limit memory consumption to 4096Mb of memory, the max of a medium class free tier CircleCI node
CircleCI: remove verbose build (no more V=1), in case of failed build, find all logs modified in last minute and output each of them on console.
coreboot module: implement load average respect inside of problematic CI build for coreboot 4.11+ being killed in the action (32 cores with 4Gb ram get gcc OOM)
coreboot module: replace nproc by number of Gb actually available as number of CPUs, since each thread is expected to have 1Gb of ram.
CircleCI & coreboot config: fix merge conflict rebasing on master
coreboot 4.11 kgpe-d16 vboot patches addendum, credits goes to @Tonux599
Fix merge conflicts and make sure all boards are inside of CircleCI builds. PoC build for #867
* modules/linux: add support for building with kernel 5.4.69
Add support to module, port patches from 4.19.139.
Needed for newer platforms not supported by 4.19 kernel.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* CircleCI: add rysnc dependency for building kernel 5.x
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* Migrate all Librem boards to kernel 5.x, common config
Update linux-librem_common.config from 4.x to 5.x, and add
CONFIG items needed to support the librem_l1um (AST DRM drivers,
serial port output).
Tested on Librem 13v4, Librem Mini, and Librem Server L1UM.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* config/coreboot-*: drop CONFIG_LOCALVERSION
Will be injected as part of the build using $(HEADS_GIT_VERSION)
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* modules/coreboot: inject $(HEADS_GIT_VERSION) as CONFIG_LOCALVERSION
Needed for fwupd to handle board updates
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* modules/coreboot: override SMBIOS ProductName with $(BOARD)
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* Use $(BOARD)-$(HEADS_GIT_VERSION) as basis for output filename
makes builds uniquely identifiable based on board and version.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Increase size of CBFS to 0xC00000 (from 0x800000) to accomodate
newer/larger kernels.
Update purism-blobs module so an update/modified IFD and smaller
ME blob are used.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* x230-hotp-verification: revert to coreboot "CONFIG_CBFS_SIZE=0x700000" by disabling board "CONFIG_DROPBEAR=y" and "CONFIG_LINUX_E1000E" to save space per @alex-nitrokey test under #770 to fix#608
* x230-htop-verification board: add clarifications on x230 board differences. Fixes#737#770#608
* X230 board & coreboot config: Fix x230 board, removing dropbear and e1000e driver.
* t430: board and coreboot config par with x230 to circumvent CBFS linked suspend/resume issues.
* add x230-nkstorecli board;
* add modules: nkstorecli, libnk, libhidapi-libusb
* version bump nkstorecli; related minor in libnk
* upd. libnk module version bump to 3.6; remove 3.5 patch
* modules/coreboot: add option to use coreboot 4.11
Port patches from coreboot 4.8.1 to 4.11:
* 0000-measure-boot -> 0001
* 0010-cross-compiler-support
All other patches for coreboot 4.8.1 have either already been
integrated, or are for platforms which do not need to be migrated
to coreboot 4.11 (they will move to 4.12 or newer).
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* patches/coreboot-4.11: Add Broadwell-DE platform patch
Add a patch for FSP Broadwell-DE to make use of Heads' measured boot.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* patches/coreboot-4.11: Add patch to read serial # from CBFS
Will be used by multiple Librem boards.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* patches/coreboot-4.11: add board support for Librem Server L1UM
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* Librem Server L1UM: add new board
Add board config, coreboot config, kernel config files.
Add conditional purism-blobs dependency to coreboot-4.11 module.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* flash.sh: add special handling for librem_l1um board
Add support for persisting PCIe config via PCHSTRP9 in flash descriptor.
This is needed to support multiple variants of the L1UM server which
use the same firmware but differ in PCIe lane configuration via the
PCH straps configuration in the flash descriptor.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* patches/coreboot-4.11: Add 'Use PRIxPTR to print uintptr_t' patch
Cherry-picked from upstream coreboot (post-4.11), fixes compilation issue.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* CircleCI: add target to build board librem_l1um
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Set the kernel video mode for the internal display to 1080p,
as the native panel resolution of 2160p is difficult to read.
A recent update to fbwhiptail allows the GUI to make use of the
scaled resolution as well, provided it is set via kernel param.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* patches/coreboot-4.12: add cross-compiler support patch
Ported from coreboot-4.8.1, re-exported via `git diff`
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* modules/coreboot: use musl-cross-make to build
revert toolchain bits to pre-4.12 addition
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* config/coreboot-librem_mini: use CONFIG_ANY_TOOLCHAIN
Needed since coreboot 4.12 now built with musl-cross-make
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
There's only one Librem Mini board, it doesn't use a TPM,
no reason to unnecesarily lengthen the board name.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* CircleCI: readd librem_mini while making sure that if a board build fails, all logfile modified in the last minute are outputted on the CircleCI console prior to really failing and exiting
* librem_mini-NoTPM: addition of board config, distinctive coreboot config (required per Heads build system) to construct a ROM without TPM requirement.
* librem_mini: deletion of board and coreboot relative config, keeping librem_mini-NoTPM and coreboot config only. Removed librem_mini board build under CircleCI, keeping only librem_mini-NoTPM
* patches/coreboot-4.12: Add patch for Cannonlake ME status
Add patch print ME status regardless of enablement state
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* modules: add purism-blobs module
Rather than require users to manually run a script to download the required
blobs to build Purism Librem boards, automate it so the correct version
is automatically downloaded/extracted. Restrict to coreboot 4.12 for now
since 4.8.1 still needs FSP blobs, which are not in module.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* configs/linux-librem13v2: unset CONFIG_RETPOLINE
Fixes compilation issue with newer kernels, ignored by older ones
which don't need it
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* Add new board: Librem Mini
Add Librem Mini board patch for coreboot 4.12, board config and
coreboot config. Continue reusing existing librem13v2 Linux config,
same as all other Librem boards currently. Use new purism-blobs module.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* board/librem*: rename for consistency
Use 'librem_<board>' notation for consistency across all models.
Rename linux config file since used by multiple Librem models.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* CircleCI: add librem_mini board to test
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
* Add support for the Lenovo ThinkPad T420 and X220.
* Fix the autodetection of ifdtool and me_cleaner.
* Enable FBWhiptail mode for X220 and T420
* Decreased CBFS size to fix 50 seconds boot delay problems
Add ability to change CMOS values by genning SMBIOS tables and using the values from stock bios, this allows for editing of SMBIOS values to change things such as VRAM allocation, FN and CTRL key swap etc
Disabling IOMMU on the iGPU for Heads (mostly) eliminates
display corruption when kexec'ing to new kernel (and has no effect
on iGPU/IOMMU for kexec'ed kernel)
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Drop coreinto/memtest secondary payloads as they are not
usable with Linux as primary payload. Leftover copy-pasta
from original SeaBIOS configs.
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Remove debug symbols and dynamic debug support from Linux. This reduces
our resulting bzImage by 100K.
This should help when size becomes even more limited, see #562
This changes Heads' bootscript for the x230 to gui-init and adds config
options needed for it. The config is very similar to the librem13v2 config.
My comparison of startup-time from a power-button press shows 2.5 seconds
more with these changes applied.
That said, the experience is smooth, the GUI is beautiful and easier to use
than the shell and text menu, especially during setup. That's what we
buy with startup time here.
The Librem coreboot is labeled with the current version and is visible
from dmidecode and is supposed to reflect the current version of
coreboot, however it was out of date and reflected 4.7 when Heads has
moved on to 4.8.1.
I've also added a simple change to further simplify onboarding by
warning users who have Librem Key configured when they boot without it
being inserted.
This reduces the amount of noise in the Linux kernel config files
by only storing the differences from the stock configuration.
It adds a new makefile target 'linux.saveconfig' to convert the
build tree's .config file into config/linux-linuxboot.config.
Adding the VBT file makes it available through some ACPI memory area
and apparently the VBT contains the information needed by the i915 driver
in order to figure out how to control the screen's backlight.
Without the VBT, we can't control the screen backlight with Fn-F5/Fn-F6
anymore.
Fixes access to the EC through the Index I/O interface
Fixes AC and DC LoadLine values to avoid overheating problems
Fix Turbo mode value from EC
Change version name to have '-heads' suffix
By enabling Pass-through iommu, it fixes the GPU glitching issues
we've had with IOMMU, and it also allows us to boot a target kernel
without having to give it intel_iommu=igfx_off as argument.
Guarded linuxboot specific init entries
Removed Makefile entries into separate file (conflicts with srcing /etc/config)
Added CONFIG_BOOT_LOCAL/_REMOTE to control interface setup
Fixed CONFIG_TPM usage
USB smart card readers are most full speed devices, and there is no
"rate-matching hubs" beneath the root hub on older (e.g. GM45) plat-
forms, which has companion OHCI or UHCI controllers and needs cor-
responding drivers to communicate with card readers directly plugged
into the motherboard, otherwise a discrete USB hub should be inserted
between the motherboard and the reader.
This time I make inserting linux modules for OHCI and UHCI controllable
with option CONFIG_LINUX_USB_COMPANION_CONTROLLER.
A linux config for x200 is added as an example.
Tested on my x200s and elitebook revolve 810g1.
Move board configuration into `boards/` instead of `config/`
Fix mistake in building kernel module tree before kernel was done.
Allow per-board initrd builds (#278)
Allow per-board configurations for things (#304)
This modifies the `Makefile.nerf` to create files based on the
$(BOARD) variable, which is necessary as we start to support
multiple mainboards.
The config files must define five variables, all in bytes:
* `NERF_SIZE` - for the EFI firmware volume that contains Linux
* `PEI_SIZE` - size of the PEI image in the vendor ROM
* `PEI_OFFSET` - offset of the PEI image in the vendor ROM
* `ME_SIZE` - size of the ME image in the vendor ROM, or 0 if
there is no ME image to be extracted.
* `ME_OFFSET` - offset of the ME image in the vendor ROM
The `ifd.bin` must be created and can be checked in.
The default ROM input file is `blobs/$(BOARD)/$(BOARD).rom`,
and it *must not* be checked in.
This links in the AcpiTableDxe and AcpiPlatform executables from
the edk2 build tree and adds a depex dependency for the Linux
kernel on the AcpiTable being setup. The `acpi.cpio` file is
no longer included in the Linux kernel bzImage.
The `Makefile.nerf` has been re-written to generate the firmware
file system (FFS) files via rules.
TODO: figure out how to add LZMA compressed sections so that the
900k acpi tables can be compressed to about 100k.
This allows flashrom to work on the r630 NERF server, but
also increases the size of the flashrom executable significantly
since it brings in all chipset and flash types.
This development branch builds a NERF firmware for the Dell R630
server. It does not use coreboot; instead it branches directly
from the vendor's PEI core into Linux and the Heads runtime
that is setup to be run as an EFI executable.
Changed the checking of required hashes or required rollback state
to be right before boot, allowing the user to sign/set defaults
in interactive mode.
Also cleaned up usages of recovery and fixed iso parameter
regression.
Similar to qubes-update, it will save then verify the hashes of
the kexec files. Once TOTP is verified, a normal boot will verify
that the file hashes and all the kexec params match and if
successful, boot directly to OS.
Also added a config option to require hash verification for
non-recovery boots, failing to recovery not met.
Refactored boot parsing code and applied that in local-init to
scan /boot for grub options and allow the user to unsafely boot
anything. This goes a long way to addressing #196.
Optionally the user can customize those boot parameters or enforce
arbitrary hashes on the boot device by creating and signing config
files in /boot/ or /media/ or /media/kexec_iso/ISO_FILENAME/.
Supports booting from USB media using either the root device or
a signed ISO as the boot device. Boot options are parsed with
quick/dirty shell scripts to infer kexec params.
Closes#195 and begins to address #196
Replace libuuid with util-linux libuuid (and libblkid,
although we are not using libblkid right now).
This also requires a much larger coreboot cbfs, which was
fixed as part of issue #154.
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
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.
No patches are required to boot 4.9 as a coreboot payload,
unlike the 4.7 kernel that required a head_64.S patch.
The new kernel is about 40 KB larger than the 4.7; the
config might be shrinkable.
Close issue #61.
rename TARGET to BOARD (fix#55)
use .INTERMEDIATE trick to avoid building multiple times (fix#52)
Don't touch build/*/.config if we don't have to (fix#51)
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.
