mbox series

[v4,00/20] Implement GENERIC_CMDLINE

Message ID cover.1617375802.git.christophe.leroy@csgroup.eu (mailing list archive)
Headers show
Series Implement GENERIC_CMDLINE | expand

Message

Christophe Leroy April 2, 2021, 3:18 p.m. UTC
The purpose of this series is to improve and enhance the
handling of kernel boot arguments.

Current situation is that most if not all architectures are using
similar options to do some manupulation on command line arguments:
- Prepend built-in arguments in front of bootloader provided arguments
- Append built-in arguments after bootloader provided arguments
- Replace bootloader provided arguments by built-in arguments
- Use built-in arguments when none is provided by bootloader.

On some architectures, all the options are possible. On other ones,
only a subset are available.

The purpose of this series is to refactor and enhance the
handling of kernel boot arguments so that every architecture can
benefit from all possibilities.

It is first focussed on powerpc but also extends the capability
for other arches.

The work has been focussed on minimising the churn in architectures
by keeping the most commonly used namings.

Main changes in V4:
- Included patch from Daniel to replace powerpc's strcpy() by strlcpy()
- Using strlcpy() instead of zeroing first char + strlcat() (idea taken frm Daniel's series)
- Reworked the convertion of EFI which was wrong in V3
- Added "too long" command line handling
- Changed cmdline macro into a function
- Done a few fixes in arch (NIOS2, SH, ARM)
- Taken comments into account (see individual responses for details)
- Tested on powerpc, build tested on ARM64, X86_64.

Main changes in V3:
- Also accept destination equal to source in cmdline_build() by setting a tmp buffer in __initdata. Powerpc provides different source and destination and call __cmdline_build() directly.
- Taken comments received from Will and Rob
- Converted all architectures (Only tested on powerpc)

Christophe Leroy (19):
  cmdline: Add generic function to build command line.
  drivers: of: use cmdline building function
  x86/efi: Replace CONFIG_CMDLINE_OVERRIDE by CONFIG_CMDLINE_FORCE
  drivers: firmware: efi: use cmdline building function
  cmdline: Gives architectures opportunity to use generically defined
    boot cmdline manipulation
  powerpc: Convert to GENERIC_CMDLINE
  arm: Convert to GENERIC_CMDLINE
  arm64: Convert to GENERIC_CMDLINE
  hexagon: Convert to GENERIC_CMDLINE
  microblaze: Convert to GENERIC_CMDLINE
  nios2: Convert to GENERIC_CMDLINE
  openrisc: Convert to GENERIC_CMDLINE
  riscv: Convert to GENERIC_CMDLINE
  sh: Convert to GENERIC_CMDLINE
  sparc: Convert to GENERIC_CMDLINE
  xtensa: Convert to GENERIC_CMDLINE
  x86: Convert to GENERIC_CMDLINE
  mips: Convert to GENERIC_CMDLINE
  cmdline: Remove CONFIG_CMDLINE_EXTEND

Daniel Walker (1):
  powerpc: convert strcpy to strlcpy in prom_init

 arch/arm/Kconfig                              | 38 +--------
 arch/arm/kernel/atags_parse.c                 | 13 +--
 arch/arm64/Kconfig                            | 33 +-------
 arch/arm64/kernel/idreg-override.c            |  9 +--
 arch/hexagon/Kconfig                          | 11 +--
 arch/hexagon/kernel/setup.c                   | 10 +--
 arch/microblaze/Kconfig                       | 24 +-----
 arch/microblaze/configs/mmu_defconfig         |  2 +-
 arch/microblaze/kernel/head.S                 |  4 +-
 arch/mips/Kconfig                             |  1 +
 arch/mips/Kconfig.debug                       | 44 -----------
 arch/mips/configs/ar7_defconfig               |  1 -
 arch/mips/configs/bcm47xx_defconfig           |  1 -
 arch/mips/configs/bcm63xx_defconfig           |  1 -
 arch/mips/configs/bmips_be_defconfig          |  1 -
 arch/mips/configs/bmips_stb_defconfig         |  1 -
 arch/mips/configs/capcella_defconfig          |  1 -
 arch/mips/configs/ci20_defconfig              |  1 -
 arch/mips/configs/cu1000-neo_defconfig        |  1 -
 arch/mips/configs/cu1830-neo_defconfig        |  1 -
 arch/mips/configs/e55_defconfig               |  1 -
 arch/mips/configs/generic_defconfig           |  1 -
 arch/mips/configs/gpr_defconfig               |  1 -
 arch/mips/configs/loongson3_defconfig         |  1 -
 arch/mips/configs/mpc30x_defconfig            |  1 -
 arch/mips/configs/rt305x_defconfig            |  1 -
 arch/mips/configs/tb0219_defconfig            |  1 -
 arch/mips/configs/tb0226_defconfig            |  1 -
 arch/mips/configs/tb0287_defconfig            |  1 -
 arch/mips/configs/workpad_defconfig           |  1 -
 arch/mips/configs/xway_defconfig              |  1 -
 arch/mips/kernel/relocate.c                   |  4 +-
 arch/mips/kernel/setup.c                      | 40 +---------
 arch/mips/pic32/pic32mzda/early_console.c     |  2 +-
 arch/mips/pic32/pic32mzda/init.c              |  2 -
 arch/nios2/Kconfig                            | 25 +-----
 arch/nios2/kernel/setup.c                     | 13 +--
 arch/openrisc/Kconfig                         | 10 +--
 arch/powerpc/Kconfig                          | 37 +--------
 arch/powerpc/kernel/prom_init.c               | 46 ++++++-----
 arch/riscv/Kconfig                            | 44 +----------
 arch/riscv/kernel/setup.c                     |  7 +-
 arch/sh/Kconfig                               | 28 +------
 arch/sh/configs/ap325rxa_defconfig            |  2 +-
 arch/sh/configs/dreamcast_defconfig           |  2 +-
 arch/sh/configs/ecovec24-romimage_defconfig   |  2 +-
 arch/sh/configs/ecovec24_defconfig            |  2 +-
 arch/sh/configs/edosk7760_defconfig           |  2 +-
 arch/sh/configs/espt_defconfig                |  2 +-
 arch/sh/configs/j2_defconfig                  |  2 +-
 arch/sh/configs/kfr2r09-romimage_defconfig    |  2 +-
 arch/sh/configs/kfr2r09_defconfig             |  2 +-
 arch/sh/configs/lboxre2_defconfig             |  2 +-
 arch/sh/configs/microdev_defconfig            |  2 +-
 arch/sh/configs/migor_defconfig               |  2 +-
 arch/sh/configs/polaris_defconfig             |  2 +-
 arch/sh/configs/r7780mp_defconfig             |  2 +-
 arch/sh/configs/r7785rp_defconfig             |  2 +-
 arch/sh/configs/rsk7201_defconfig             |  2 +-
 arch/sh/configs/rsk7203_defconfig             |  2 +-
 arch/sh/configs/rts7751r2d1_defconfig         |  2 +-
 arch/sh/configs/rts7751r2dplus_defconfig      |  2 +-
 arch/sh/configs/sdk7780_defconfig             |  2 +-
 arch/sh/configs/sdk7786_defconfig             |  2 +-
 arch/sh/configs/se7206_defconfig              |  2 +-
 arch/sh/configs/se7343_defconfig              |  2 +-
 arch/sh/configs/se7712_defconfig              |  2 +-
 arch/sh/configs/se7721_defconfig              |  2 +-
 arch/sh/configs/se7724_defconfig              |  2 +-
 arch/sh/configs/se7751_defconfig              |  2 +-
 arch/sh/configs/se7780_defconfig              |  2 +-
 arch/sh/configs/sh03_defconfig                |  2 +-
 arch/sh/configs/sh2007_defconfig              |  2 +-
 arch/sh/configs/sh7757lcr_defconfig           |  2 +-
 arch/sh/configs/sh7763rdp_defconfig           |  2 +-
 arch/sh/configs/shmin_defconfig               |  2 +-
 arch/sh/configs/shx3_defconfig                |  2 +-
 arch/sh/configs/titan_defconfig               |  2 +-
 arch/sh/configs/ul2_defconfig                 |  2 +-
 arch/sh/kernel/setup.c                        | 11 +--
 arch/sparc/Kconfig                            | 18 +----
 arch/sparc/prom/bootstr_64.c                  |  2 +-
 arch/x86/Kconfig                              | 45 +----------
 arch/x86/kernel/setup.c                       | 17 +---
 arch/xtensa/Kconfig                           | 15 +---
 arch/xtensa/configs/audio_kc705_defconfig     |  1 -
 arch/xtensa/configs/common_defconfig          |  1 -
 arch/xtensa/configs/generic_kc705_defconfig   |  1 -
 arch/xtensa/configs/iss_defconfig             |  1 -
 arch/xtensa/configs/nommu_kc705_defconfig     |  1 -
 arch/xtensa/configs/smp_lx200_defconfig       |  1 -
 arch/xtensa/configs/virt_defconfig            |  1 -
 arch/xtensa/configs/xip_kc705_defconfig       |  1 -
 arch/xtensa/kernel/setup.c                    | 10 +--
 .../firmware/efi/libstub/efi-stub-helper.c    | 35 ++++----
 drivers/firmware/efi/libstub/efi-stub.c       | 23 ++----
 drivers/firmware/efi/libstub/efistub.h        |  2 +-
 drivers/firmware/efi/libstub/x86-stub.c       | 18 +----
 drivers/of/fdt.c                              | 23 +-----
 include/linux/cmdline.h                       | 79 +++++++++++++++++++
 init/Kconfig                                  | 46 +++++++++++
 usr/Kconfig                                   |  2 +-
 102 files changed, 265 insertions(+), 628 deletions(-)
 create mode 100644 include/linux/cmdline.h

Comments

Daniel Walker April 6, 2021, 4:56 p.m. UTC | #1
On Fri, Apr 02, 2021 at 03:18:01PM +0000, Christophe Leroy wrote:
> The purpose of this series is to improve and enhance the
> handling of kernel boot arguments.
> 
> Current situation is that most if not all architectures are using
> similar options to do some manupulation on command line arguments:
> - Prepend built-in arguments in front of bootloader provided arguments
> - Append built-in arguments after bootloader provided arguments
> - Replace bootloader provided arguments by built-in arguments
> - Use built-in arguments when none is provided by bootloader.
> 
> On some architectures, all the options are possible. On other ones,
> only a subset are available.
> 
> The purpose of this series is to refactor and enhance the
> handling of kernel boot arguments so that every architecture can
> benefit from all possibilities.
> 
> It is first focussed on powerpc but also extends the capability
> for other arches.
> 
> The work has been focussed on minimising the churn in architectures
> by keeping the most commonly used namings.
> 
> Main changes in V4:
> - Included patch from Daniel to replace powerpc's strcpy() by strlcpy()
> - Using strlcpy() instead of zeroing first char + strlcat() (idea taken frm Daniel's series)
> - Reworked the convertion of EFI which was wrong in V3
> - Added "too long" command line handling
> - Changed cmdline macro into a function
> - Done a few fixes in arch (NIOS2, SH, ARM)
> - Taken comments into account (see individual responses for details)
> - Tested on powerpc, build tested on ARM64, X86_64.
> 

Why submit your changes ? My changes have been around for almost 10 years, and
are more widely used. Your changes are very new and unstable, but don't really
solve the needs of people using my series.

I've tried to work with you and I take comments from you, but yet you insist to
submit your own series.

I would suggest this isn't going to go anyplace unless we work together.

I can't really support your changes because, honestly, your changes are really
ugly and they just look more and more like my changes with every passing
iteration .. As the maturity of your changes continue they will just become my
change set.

I've been thru every iteration of these changes, and I see those attempts in
your changes. Everything different in your changes I've tried, and found not to
be useful, then it falls away in later iterations.

When you give me comments on something which I haven't tried I typically
incorporate it.

Daniel