[PATCH u-boot v2 00/38] U-Boot LTO (Sandbox + Some ARM boards)

Marek Behún marek.behun at nic.cz
Fri Mar 12 11:33:51 CET 2021


Hello,

I am sending version 2 of patches adding support for LTO to U-Boot.

This series was tested by Github/Azure CI at
  https://github.com/u-boot/u-boot/pull/57

Code reduction is on average 4.23% for u-boot.bin and 13.58% for
u-boot-spl.bin.

I am currently running a build test for all 1077 ARM defconfigs.
Of the first 232 defconfigs, 2 are failing when LTO is enabled
(chromebook_jerry and chromebook_speedy). Note that this series
only enables LTO for tested boards.

Changes since v1:
- remove patches applied into u-boot-marvell
- added Reviewed-by tags
- addressed some issues discovered by Bin Meng, Marek Vasut,
  Heinrich Schuchardt
- added more ARM boards (thanks to Adam Ford, Tim Harvey and Bin Meng)
- removed --gc-sections for ARM if internal libgcc is used
- remove -fwhole-program in final LTO LDFLAGS
- declared all 4 functions (memcpy, memset, memcmp, memmove) __used,
  (these are mentioned in GCC man page for option -nodefaultlibs that
   the compiler may generate; this seems to be a bug in GCC that linking
   fails with LTO even if these functions are present, because the
   symbols can be renamed on some targets by optimization)

Marek

Marek Behún (38):
  regmap: fix a serious pointer casting bug
  api: fix a potential serious bug caused by undef CONFIG_SYS_64BIT_LBA
  checkpatch: require quotes around section name in the __section()
    macro
  treewide: Convert macro and uses of __section(foo) to __section("foo")
  compiler.h: align the __ADDRESSABLE macro with Linux' version
  linker_lists: prepare macros to avoid code repetition
  test/py: improve regular expression for ut subtest symbol matcher
  linker_lists: declare lists and entries as __ADDRESSABLE for LTO
  string: make memcpy(), memset(), memcmp() and memmove() visible for
    LTO
  efi_loader: fix warning when linking with LTO
  efi_loader: add Sphinx doc for __efi_runtime and __efi_runtime_data
  efi_loader: add macro for const EFI runtime data
  efi_selftest: compiler flags for efi_selftest_miniapp_exception.o
  lib: crc32: put the crc_table variable into efi_runtime_rodata section
  Makefile, Makefile.spl: cosmetic change
  build: use thin archives instead of incremental linking
  build: support building with Link Time Optimizations
  sandbox: errno: avoid conflict with libc's errno
  sandbox: use sections instead of symbols for getopt array boundaries
  sandbox: make LTO available
  sandbox: enable LTO by default
  ARM: global_data: make set_gd() work for armv5 and armv6
  ARM: make gd a function call for LTO and set via set_gd()
  ARM: fix LTO build for some thumb-interwork cases
  ARM: fix LTO for imx28_xea
  ARM: fix LTO for apf27
  ARM: fix LTO for keystone
  ARM: kona: fix clk_bsc_enable() type mismatch for LTO
  ARM: imx8m: fix imx_eqos_txclk_set_rate() type mismatch for LTO
  ARM: fix LTO for seaboard
  ARM: fix LTO for rockchip and samsung
  ARM: omap3: fix LTO for DM3730 (and possibly other omap3 boards)
  armv8: SPL: discard relocation information
  ata: ahci: fix ahci_link_up() type mismatch for LTO
  ARM: make LTO available
  ARM: don't use -ffunction-sections/-fdata-sections with LTO build
  ARM: don't use --gc-sections with LTO when using private libgcc
  ARM: enable LTO for some boards

 Kbuild                                     |  2 +
 Kconfig                                    | 19 +++++++
 Makefile                                   | 48 ++++++++++++++--
 arch/Kconfig                               |  3 +
 arch/arm/config.mk                         | 10 +++-
 arch/arm/cpu/arm926ejs/Makefile            |  2 +
 arch/arm/cpu/arm926ejs/mxs/mxs.c           |  2 +-
 arch/arm/cpu/arm926ejs/mxs/spl_boot.c      |  4 +-
 arch/arm/cpu/arm926ejs/spear/spl.c         |  2 +-
 arch/arm/cpu/armv7/kona-common/clk-stubs.c |  2 +-
 arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c  |  2 +-
 arch/arm/cpu/armv8/fsl-layerscape/spl.c    |  2 +-
 arch/arm/cpu/armv8/spl_data.c              |  4 +-
 arch/arm/cpu/armv8/u-boot-spl.lds          |  1 +
 arch/arm/include/asm/global_data.h         |  6 +-
 arch/arm/include/asm/secure.h              |  6 +-
 arch/arm/include/asm/setup.h               |  2 +-
 arch/arm/lib/Makefile                      |  3 +
 arch/arm/lib/sections.c                    | 31 +++++-----
 arch/arm/lib/spl.c                         |  2 +-
 arch/arm/mach-at91/spl.c                   |  2 +-
 arch/arm/mach-exynos/spl_boot.c            |  2 +-
 arch/arm/mach-imx/imx8m/clock_imx8mm.c     |  2 +-
 arch/arm/mach-imx/imx8m/soc.c              |  2 +-
 arch/arm/mach-imx/spl_imx_romapi.c         | 16 +++---
 arch/arm/mach-k3/am6_init.c                |  2 +-
 arch/arm/mach-k3/j721e_init.c              |  4 +-
 arch/arm/mach-keystone/Makefile            |  1 +
 arch/arm/mach-mvebu/mbus.c                 |  4 +-
 arch/arm/mach-mvebu/timer.c                |  2 +-
 arch/arm/mach-nexell/clock.c               |  6 +-
 arch/arm/mach-nexell/timer.c               |  6 +-
 arch/arm/mach-omap2/omap3/Makefile         |  2 +
 arch/arm/mach-rockchip/board.c             |  2 +-
 arch/arm/mach-socfpga/spl_a10.c            |  2 +-
 arch/arm/mach-sunxi/board.c                |  2 +-
 arch/arm/mach-tegra/board.c                |  2 +-
 arch/arm/mach-tegra/cboot.c                |  8 +--
 arch/arm/mach-tegra/tegra20/Makefile       |  1 +
 arch/mips/mach-jz47xx/jz4780/jz4780.c      |  2 +-
 arch/nds32/include/asm/setup.h             |  6 +-
 arch/powerpc/include/asm/cache.h           |  4 +-
 arch/riscv/cpu/cpu.c                       |  4 +-
 arch/sandbox/config.mk                     | 12 +++-
 arch/sandbox/cpu/os.c                      |  3 +-
 arch/sandbox/cpu/start.c                   |  3 +-
 arch/sandbox/cpu/u-boot-spl.lds            |  8 ++-
 arch/sandbox/cpu/u-boot.lds                |  8 ++-
 arch/sandbox/include/asm/getopt.h          |  2 +-
 arch/sandbox/include/asm/sections.h        | 21 ++++++-
 arch/sandbox/lib/sections.c                |  9 +--
 arch/x86/cpu/coreboot/tables.c             |  2 +-
 arch/x86/cpu/coreboot/timestamp.c          |  2 +-
 arch/x86/lib/sections.c                    |  9 +--
 arch/xtensa/cpu/cpu.c                      |  2 +-
 board/bosch/shc/board.c                    |  2 +-
 board/broadcom/bcmstb/bcmstb.c             |  2 +-
 board/samsung/arndale/arndale_spl.c        |  2 +-
 board/samsung/common/exynos5-dt.c          |  2 +-
 board/samsung/smdk5250/smdk5250_spl.c      |  2 +-
 board/samsung/smdk5420/smdk5420_spl.c      |  2 +-
 board/siemens/draco/board.c                |  2 +-
 board/xilinx/common/fru_ops.c              |  2 +-
 configs/am3517_evm_defconfig               |  1 +
 configs/da850evm_defconfig                 |  1 +
 configs/da850evm_direct_nor_defconfig      |  1 +
 configs/da850evm_nand_defconfig            |  1 +
 configs/imx6q_logic_defconfig              |  1 +
 configs/imx8mm_beacon_defconfig            |  1 +
 configs/imx8mm_venice_defconfig            |  1 +
 configs/imx8mn_beacon_2g_defconfig         |  1 +
 configs/imx8mn_beacon_defconfig            |  1 +
 configs/nokia_rx51_defconfig               |  1 +
 configs/r8a774a1_beacon_defconfig          |  1 +
 configs/r8a774b1_beacon_defconfig          |  1 +
 configs/r8a774e1_beacon_defconfig          |  1 +
 configs/turris_mox_defconfig               |  1 +
 configs/turris_omnia_defconfig             |  1 +
 drivers/ata/ahci.c                         |  2 +-
 drivers/bios_emulator/biosemu.c            |  4 +-
 drivers/core/regmap.c                      | 13 ++++-
 drivers/firmware/psci.c                    |  2 +-
 drivers/mtd/nand/raw/mxc_nand_spl.c        |  2 +-
 drivers/pinctrl/nxp/pinctrl-imx5.c         |  2 +-
 drivers/pinctrl/nxp/pinctrl-imx7.c         |  2 +-
 drivers/pinctrl/nxp/pinctrl-imx8m.c        |  2 +-
 drivers/power/pmic/pmic_tps62362.c         |  2 +-
 drivers/power/pmic/pmic_tps65217.c         |  2 +-
 drivers/power/pmic/pmic_tps65218.c         |  2 +-
 drivers/power/pmic/pmic_tps65910.c         |  2 +-
 drivers/serial/serial_pl01x.c              |  4 +-
 include/api_public.h                       | 23 ++++++--
 include/efi_loader.h                       | 54 +++++++++++++++---
 include/errno.h                            |  8 ++-
 include/linker_lists.h                     | 66 ++++++++++++++--------
 include/linux/compiler.h                   | 10 ++--
 include/linux/compiler_attributes.h        |  2 +-
 lib/crc32.c                                |  3 +-
 lib/efi_selftest/Makefile                  |  2 +
 lib/errno.c                                |  4 +-
 lib/string.c                               |  9 +--
 lib/trace.c                                |  4 +-
 scripts/Makefile.build                     | 16 +++---
 scripts/Makefile.lib                       |  3 +
 scripts/Makefile.spl                       | 34 +++++++++--
 scripts/checkpatch.pl                      |  2 +-
 test/py/conftest.py                        |  2 +-
 107 files changed, 439 insertions(+), 193 deletions(-)

-- 
2.26.2



More information about the U-Boot mailing list