February 2026 - Concept

[PATCH 0/9] pickman: Improve handling of large merges and add rewind
by Simon Glass 12 Feb '26

12 Feb '26

From: Simon Glass <simon.glass(a)canonical.com> This series adds three improvements to pickman: - Increase the agent SDK buffer size from 1MB to 10MB to avoid fatal errors when processing large responses - Decompose mega-merges (e.g. "Merge branch 'next'") into individual sub-merge batches, so the agent processes them one at a time instead of being overwhelmed by hundreds of commits at once - Add a 'rewind' command for stepping the source position back by N merges, allowing a cherry-pick run to be retried from an earlier point It also tidies up some pylint warnings. Simon Glass (9): pickman: Fix line-too-long pylint warnings in ftest pickman: Extract build_applied_map() from execute_apply() pickman: Group named-tuple declarations together pickman: Rename error to err for local variables pickman: Return NextCommitsInfo from get_next_commits() pickman: Increase agent SDK buffer size to 10MB pickman: Extract find_unprocessed_commits() from get_next_commits() pickman: Decompose mega-merges into sub-merge batches pickman: Add rewind command for stepping backwards tools/pickman/__main__.py | 10 + tools/pickman/agent.py | 8 +- tools/pickman/control.py | 634 ++++++++++++++++++----- tools/pickman/database.py | 8 + tools/pickman/ftest.py | 990 +++++++++++++++++++++++++++++++++--- tools/pickman/gitlab_api.py | 22 +- 6 files changed, 1470 insertions(+), 202 deletions(-) -- 2.43.0 base-commit: 5d89c27ce319a80f582c75be05d2456c1262c065 branch: pickd

1 9

[PATCH 00/15] riscv: Add EFI-application support
by Simon Glass 12 Feb '26

12 Feb '26

From: Simon Glass <simon.glass(a)canonical.com> Add support for building and running U-Boot as a 64-bit RISC-V EFI application on top of UEFI firmware such as EDK2. This includes build system changes (linker script, build flags, object exclusions), runtime fixes (FDT relocation skip, global data pointer handling, OF_BOARD_FIXUP disable), timer support via the firmware FDT, board files and defconfig It also provides QEMU integration in the build-efi script so it is easy to try out. Tested on QEMU riscv-virt with EDK2 firmware, boots to the U-Boot prompt. Simon Glass (15): board_f: Skip the FDT relocation when not relocating board_r: Skip set_gd() for RISC-V EFI applications riscv: Disable OF_BOARD_FIXUP for EFI applications riscv: timer: Read timebase frequency from the firmware FDT riscv: Add the EFI table field to arch_global_data riscv: Exclude -static -pie from LDFLAGS for EFI apps riscv: Add EFI application build flags riscv: efi: Exclude PLT relocations from the reloc loop riscv: Add EFI app linker script and build CRT objects riscv: Exclude start.o, mtrap.o, dram.o for EFI apps riscv: Skip prelink-riscv for EFI application builds riscv: Exclude unwanted startup code for EFI app builds efi: client: Build sync_dt for RISC-V EFI applications riscv: Add RISC-V EFI application board and defconfig scripts: build-efi: Add RISC-V architecture support Makefile | 2 + arch/riscv/Kconfig | 10 +- arch/riscv/Makefile | 2 + arch/riscv/config.mk | 19 +++ arch/riscv/cpu/Makefile | 7 +- arch/riscv/cpu/generic/Makefile | 2 + arch/riscv/dts/efi-riscv_app.dts | 49 ++++++++ arch/riscv/include/asm/global_data.h | 3 + arch/riscv/lib/Makefile | 2 + arch/riscv/lib/elf_riscv64_efi_app.lds | 136 ++++++++++++++++++++++ arch/riscv/lib/reloc_riscv_efi.c | 12 +- board/efi/Kconfig | 42 ++++--- board/efi/efi-riscv_app/Kconfig | 26 +++++ board/efi/efi-riscv_app/MAINTAINERS | 7 ++ board/efi/efi-riscv_app/Makefile | 5 + board/efi/efi-riscv_app/board.c | 51 ++++++++ board/efi/efi-riscv_app/config.mk | 6 + board/efi/efi-riscv_app/efi-riscv_app.env | 12 ++ common/board_f.c | 3 +- common/board_r.c | 3 +- configs/efi-riscv_app64_defconfig | 55 +++++++++ drivers/timer/riscv_timer.c | 13 +++ include/asm-generic/global_data.h | 8 ++ lib/efi_client/Kconfig | 6 +- lib/efi_client/Makefile | 2 + lib/efi_client/efi_app.c | 3 + scripts/build-efi | 25 +++- scripts/build_helper.py | 7 +- 28 files changed, 490 insertions(+), 28 deletions(-) create mode 100644 arch/riscv/dts/efi-riscv_app.dts create mode 100644 arch/riscv/lib/elf_riscv64_efi_app.lds create mode 100644 board/efi/efi-riscv_app/Kconfig create mode 100644 board/efi/efi-riscv_app/MAINTAINERS create mode 100644 board/efi/efi-riscv_app/Makefile create mode 100644 board/efi/efi-riscv_app/board.c create mode 100644 board/efi/efi-riscv_app/config.mk create mode 100644 board/efi/efi-riscv_app/efi-riscv_app.env create mode 100644 configs/efi-riscv_app64_defconfig -- 2.43.0 base-commit: b88a6ed6382861ea02ee538e22bff417f1d999ea branch: risva

1 15

[PATCH 00/12] x86: Add single 64-bit U-Boot without SPL for QEMU
by Simon Glass 11 Feb '26

11 Feb '26

From: Simon Glass <simon.glass(a)canonical.com> This series adds support for building a single 64-bit U-Boot binary with integrated 16-bit and 32-bit startup code, eliminating the need for SPL on platforms where RAM is available immediately (e.g. QEMU). The new start_from_32.S enters in 32-bit protected mode (from start16.S), builds identity-mapped page tables with 2MB pages, enables SSE and PAE, then transitions to 64-bit long mode before calling board_init_f(). Since the 64-bit binary is linked as PIE, the 16-bit startup objects cannot be linked into it directly. Instead they are linked into a separate 32-bit ELF and their sections are extracted to binary files for binman. Along the way this moves the x86 16-bit binary rules from the top-level Makefile into arch/x86/Makefile, and switches x86_64 to use MSR_FS_BASE for the global data pointer instead of a writable global variable. Tested on QEMU x86_64 - boots to the command prompt. The existing SPL-based qemu-x86_64 and 32-bit qemu-x86 builds are unaffected. Simon Glass (12): x86: Allow disabling the regparm calling-convention x86: Use MSR_FS_BASE for gd pointer on x86_64 efi: Cache gd->relocaddr for EFI runtime services x86: Move 16-bit binary rules to arch/x86/Makefile x86: Exclude X86_32BIT_INIT for 64-bit builds x86: Build 16-bit startup objects as 32-bit for x86_64 x86: Link 16-bit startup into separate 32-bit ELF x86: Add 32-to-64-bit startup code x86: Add qemu-x86_64_nospl defconfig x86: qemu: Enable MTRR setup for x86_64 no-SPL scripts: build-qemu: Add --no-spl option for x86_64 CI: Add test coverage for qemu-x86_64_nospl .azure-pipelines.yml | 3 + .gitlab-ci.yml | 6 + Makefile | 10 - arch/x86/Kconfig | 24 +- arch/x86/Makefile | 39 +++ arch/x86/config.mk | 2 + arch/x86/cpu/Makefile | 15 ++ arch/x86/cpu/i386/interrupt.c | 10 +- arch/x86/cpu/qemu/qemu.c | 4 +- arch/x86/cpu/start.S | 23 +- arch/x86/cpu/start_from_32.S | 248 ++++++++++++++++++ arch/x86/cpu/start_from_spl.S | 21 +- arch/x86/cpu/start_from_tpl.S | 19 +- arch/x86/cpu/u-boot-16bit.lds | 30 +++ arch/x86/cpu/x86_64/cpu.c | 2 + arch/x86/cpu/x86_64/misc.c | 12 +- arch/x86/dts/emulation-u-boot.dtsi | 2 +- arch/x86/include/asm/global_data.h | 26 +- board/emulation/qemu-x86/MAINTAINERS | 1 + configs/qemu-x86_64_nospl_defconfig | 82 ++++++ lib/efi_loader/efi_runtime.c | 19 +- scripts/build-qemu | 9 +- .../bin/travis-ci/conf.qemu-x86_64_nospl_na | 30 +++ .../u_boot_boardenv_qemu_x86_64_nospl_na.py | 14 + 24 files changed, 613 insertions(+), 38 deletions(-) create mode 100644 arch/x86/cpu/start_from_32.S create mode 100644 arch/x86/cpu/u-boot-16bit.lds create mode 100644 configs/qemu-x86_64_nospl_defconfig create mode 100644 test/hooks/bin/travis-ci/conf.qemu-x86_64_nospl_na create mode 100644 test/hooks/py/travis-ci/u_boot_boardenv_qemu_x86_64_nospl_na.py -- 2.43.0 base-commit: 06331d87ef4298638e64dab5a4d7f4ba2c19fdcb branch: qemv

1 12

[PATCH 0/4] Fix truetype bbox init and improve pager robustness
by Simon Glass 08 Feb '26

08 Feb '26

From: Simon Glass <simon.glass(a)canonical.com> Fix an uninitialised bbox in truetype_measure() and fix a severe performance regression in the pager. The pager falls back to character-by-character output because pager_post() cannot accept length-delimited strings from putsn(). Add a length parameter so the pager path handles strings directly, and reserve the nul-terminator byte at init time rather than at each read. Simon Glass (4): video: truetype: Fix uninitialised bbox on empty text hooks: Add malta for ellesmere pager: Add length parameter to pager_post() pager: Reserve nul-terminator byte at init time drivers/video/console_truetype.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) -- 2.43.0 base-commit: bd7a6fdb97ddd03a826580ab6b8007ddfc4ae5ac branch: expo-fix

1 4

[PATCH 00/13] Add putsn() for length-based console output
by Simon Glass 04 Feb '26

04 Feb '26

From: Simon Glass <simon.glass(a)canonical.com> This series adds putsn() which outputs exactly a specified number of characters from a buffer, regardless of any nul characters that may be present. This is useful for printing substrings or binary data without allocating temporary buffers. The infrastructure for length-based output already exists at the driver level (membuf_put(), __serial_puts()), so this series mainly adds the public API and necessary wrapper functions at the console layer. The feature is controlled by CONFIG_CONSOLE_PUTSN and is enabled by default for sandbox. Simon Glass (13): console: Add a Kconfig option for putsn() support serial: Support length-based serial output console: Add length-based console-recording support console: Add length-based pre-console support console: Add length-based debug UART support sandbox: Add support for length-based console output console: Add putsn() support to struct stdio_dev console: Add vidconsole support for length-based output console: Add the putsn() API for length-based string output console: Shorten the console-error-output function names console: Add err_putsn() for length-based error output console: Add putsn() to ulib CI: Add artifacts for the 'make check' CI jobs .gitlab-ci.yml | 9 ++ arch/sandbox/cpu/os.c | 8 +- common/Kconfig | 9 ++ common/console.c | 177 +++++++++++++++++++++++++++--- drivers/serial/serial-uclass.c | 34 ++++++ drivers/video/console_truetype.c | 6 +- drivers/video/vidconsole-uclass.c | 33 +++--- include/console.h | 23 +++- include/debug_uart.h | 17 +++ include/os.h | 13 +++ include/serial.h | 12 ++ include/stdio.h | 12 ++ include/stdio_dev.h | 12 ++ include/u-boot-lib.h | 15 +++ lib/ulib/ulib.c | 10 ++ test/common/console.c | 48 ++++++++ test/dm/serial.c | 20 ++++ 17 files changed, 416 insertions(+), 42 deletions(-) -- 2.43.0 base-commit: 8559ca571a16dca20274e130562a116a63846de5 branch: puts

1 13