With several new Qualcomm platforms appearing on the mailing list, all of which build U-Boot as an ELF, sign it, and then flash it to some partition on the board, we're getting a lot of defconfigs which just contain a debug UART and a TEXT_BASE address. This leads to needless rebuilds in CI of effectively the same image, and needless duplication of build instructions.
To address this, let's introduce a new tool "mkmbn.py", this is based on the existing qtestsign[1] tool but is (currently) hardcoded to only handle the Dragonwing and IPQ boards which use MBN header v6. Additionally, the tool contains a lookup table that maps from a boards DT compatible property to the load address it needs. Since it's highly unusual for different boards using the same SoC to have different load addresses, generic platform matching is also done (e.g. "qcom,qcm6490"). With this tool in place, we introduce a "u-boot.mbn" target in the Makefile, this can be invoked to build a Qualcomm signed ELF image for supported targets. Finally, the defconfigs are cleaned up by moving the debug UART definitions to config fragments (since it doesn't make sense to have them enabled by default anyway) and remove CONFIG_REMAKE_ELF. Notably, the qcs9100_defconfig is removed entirely since the same binary can be created with just make arguments. This platform entirely lacked documentation to begin with, which should be addressed by future patches. The Qualcomm documentation is also cleaned up, a new "signing" page is added to briefly cover the what and why of MBN signing, and board specific pages are updated to explain the new build process. These patches have been tested on the RB3 Gen 2, but additionally testing for other platforms would be super useful. [1]: https://github.com/msm8916-mainline/qtestsign To: Tom Rini <tr...@konsulko.com> To: Neil Armstrong <neil.armstr...@linaro.org> To: Sumit Garg <sumit.g...@kernel.org> Cc: u-boot@lists.denx.de Cc: u-boot-q...@groups.io Cc: Varadarajan Narayanan <quic_var...@quicinc.com> Cc: Balaji Selvanathan <balaji.selvanat...@oss.qualcomm.com> Cc: Aswin Murugan <aswin.muru...@oss.qualcomm.com> Signed-off-by: Casey Connolly <casey.conno...@linaro.org> --- Casey Connolly (5): tools: add mkmbn tool for Qualcomm Makefile: add u-boot.mbn target for mach-snapdragon configs: qualcomm: use fragments for debug UART configs: qualcomm: use mkmbn and stop creating ELF files doc: board/qualcomm: update docs for new u-boot.mbn target Makefile | 3 + arch/arm/mach-snapdragon/Makefile | 8 + board/qualcomm/debug-qcm6490.config | 5 + board/qualcomm/debug-qcs9100.config | 5 + configs/qcm6490_defconfig | 10 -- configs/qcom_ipq9574_mmc_defconfig | 1 - configs/qcs9100_defconfig | 18 --- doc/board/qualcomm/index.rst | 1 + doc/board/qualcomm/rb3gen2.rst | 27 ++-- doc/board/qualcomm/rdp.rst | 16 +- doc/board/qualcomm/signing.rst | 29 ++++ tools/qcom/mkmbn/cert.py | 158 ++++++++++++++++++ tools/qcom/mkmbn/elf.py | 243 ++++++++++++++++++++++++++++ tools/qcom/mkmbn/hashseg.py | 308 ++++++++++++++++++++++++++++++++++++ tools/qcom/mkmbn/mkmbn.py | 99 ++++++++++++ 15 files changed, 876 insertions(+), 55 deletions(-) --- base-commit: 8f85a7345ed5df70a155f0630da72970eb01d87a change-id: 20250522-b4-qcom-tooling-improvements-ab40585b11a1 Casey Connolly <casey.conno...@linaro.org>
