[U-Boot] [PATCH 00/18] warp7: Enable automated OPTEE/HAB boot flow

[Bryan O'Donoghue]

This series enables an automated HAB verified secure boot which chain-loads
via OPTEE see `git show 5cf3251..c225e7c` for details.

This set depends on three in-flight patchsets

1. [PATCH v3 0/3] NXP WaARP7 set serial# from OTP fuses for USB iSerial
   Already has a Reviewed-by from Fabio

2. [PATCH v3 0/2] imx: hab: Add helper functions for scripted HAB auth
   Has a Reviewed-by: from Breno

3. [PATCH] configs: warp7: Fix CAAM on boot with tip-of-tree

I'm trying not to make this cover email too long. So - once this set is
applied it is possible to boot from the BootROM using HAB to verify

- u-boot
- boot.scr
- Kernel
- DTB

Chainload via OPTEE and boot up to Linux. If there is a HAB failure at any
stage of the process we force-drop down to the USB HID failover mode, from
which we can send up a recovery image to unblock.

I've run the WaRP7 default u-boot and this new version on NXP's reference
yocto image and verified that that yocto image boots with both versions of
the WaRP7 -> warp7_defconfig and warp7_secure_defconfig.

http://freescale.github.io/#download -> BoardsWaRPboard community - WaRP -
Wearable Reference PlatformFSL Community BSP 2.3fsl-image-multimediawayland

In addition the modifications targeting warp7_secure_defconfig mean it is
possible to chain-load via OPTEE using scripted HAB to verify images prior
to exiting the u-boot domain.

Here is an example of the scripting we are doing which shows further reuse
of shell functions introduced in previous patches.

#### Example secure-boot boot.scr.imx-signed ####

# This section is responsbile for loading a signed Linux kernel
setenv image_signed zImage.imx-signed
if test ${hab_enabled} -eq 1; then
	setexpr hab_ivt_addr ${loadaddr} - ${ivt_offset}
	${loadcmd} mmc ${mmcdev}:${mmcpart} ${hab_ivt_addr} ${image_signed}
	run warp7_auth_or_fail
else
	run loadimage;
fi

# This section is responsbile for loading a signed FDT image
setenv fdt_file_signed imx7s-warp.dtb.imx-signed
if test ${hab_enabled} -eq 1; then
	setexpr hab_ivt_addr ${fdt_addr} - ${ivt_offset}
	${loadcmd} mmc ${mmcdev}:${mmcpart} ${hab_ivt_addr}
${fdt_file_signed}
	run warp7_auth_or_fail
else
	run loadfdt;
fi

# Set the filesystem type and partition target
setenv loadcmd ext4load

# Boot from rootfs1 by default
setenv mmcpart 3

# But if the rootfs2 file exists in partition 2, boot from rootfs2
ext4size mmc 0:2 rootfs2 && setenv mmcpart 5

# This section is responsbile for loading a signed OPTEE image
setenv optee_file /lib/firmware/uTee.optee
setenv optee_file_signed /lib/firmware/uTee.optee.imx-signed
setenv loadoptee "${loadcmd} mmc ${mmcdev}:${mmcpart} ${optee_addr}
${optee_file}"
if test ${hab_enabled} -eq 1; then
	setexpr hab_ivt_addr ${optee_addr} - ${ivt_offset}
	${loadcmd} mmc ${mmcdev}:${mmcpart} ${hab_ivt_addr}
${optee_file_signed}
	run warp7_auth_or_fail
else
	run loadoptee;
fi

# Set UUID mmcpart will be used to pass root id to kernel
setenv rootpart ${mmcpart}
run finduuid;
run mmcargs;

# Now boot
echo Booting secure Linux/OPTEE OS from mmc ...;
bootm ${optee_addr} - ${fdt_addr};

# Failsafe if something goes wrong
hab_failsafe

Bryan O'Donoghue (18):
  imximage: Specify default IVT offset in IMX image
  warp7: hab: Add a CSF location definition
  warp7: hab: Set environment variable indicating HAB enable
  warp7: defconfig: Enable OPTEE for WaRP7
  warp7: Allocate specific region of memory to OPTEE
  warp7: Print out the OPTEE DRAM region
  warp7: Specify CONFIG_OPTEE_LOAD_ADDR
  warp7: defconfig: Enable CONFIG_SECURE_BOOT
  warp7: defconfig: Enable CONFIG_BOOTM_TEE
  warp7: Make CONFIG_SYS_FDT_ADDR a define
  warp7: Add Kconfig WARP7_ROOT_PART
  warp7: select uuid partition based on rootpart
  warp7: Define the name of a signed boot-script file
  warp7: add warp7_auth_or_fail
  warp7: Make load command an environment variable
  warp7: hab: Set environment variable indicating IVT offset
  warp7_secure: defconfig: Enable CMD_SETEXPR
  warp7: Add support for automated secure boot.scr verification

 board/warp7/Kconfig            | 14 ++++++++++++++
 board/warp7/imximage.cfg       |  4 ++++
 board/warp7/warp7.c            | 23 +++++++++++++++++++++++
 configs/warp7_secure_defconfig |  6 +++++-
 include/configs/warp7.h        | 29 ++++++++++++++++++++++++-----
 include/imximage.h             |  3 +++
 6 files changed, 73 insertions(+), 6 deletions(-)

-- 
2.7.4