[PATCH 00/11] Wire up CRC-T10DIF library functions to arch-optimized code

[Zhihang Shao]

On 2024/11/17 8:22, Eric Biggers wrote:

This patchset is also available in git via:

     git fetch 
https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git 
crc-t10dif-lib-v1

This patchset updates the kernel's CRC-T10DIF library functions to be
directly optimized for x86, arm, arm64, and powerpc without taking an
unnecessary and inefficient detour through the crypto API.  It follows
the same approach that I'm taking for CRC32 in the patchset
https://lore.kernel.org/linux-crypto/20241103223154.136127-1-ebiggers@kernel.org

This patchset also adds a CRC KUnit test suite that covers multiple CRC
variants, and deletes some older ad-hoc tests that are obsoleted by it.

This patchset has several dependencies including my CRC32 patchset and
patches queued in several trees for 6.13.  It can be retrieved from git
using the command given above.  This is targeting 6.14.

Eric Biggers (11):
   lib/crc-t10dif: stop wrapping the crypto API
   lib/crc-t10dif: add support for arch overrides
   crypto: crct10dif - expose arch-optimized lib function
   x86/crc-t10dif: expose CRC-T10DIF function through lib
   arm/crc-t10dif: expose CRC-T10DIF function through lib
   arm64/crc-t10dif: expose CRC-T10DIF function through lib
   powerpc/crc-t10dif: expose CRC-T10DIF function through lib
   lib/crc_kunit.c: add KUnit test suite for CRC library functions
   lib/crc32test: delete obsolete crc32test.c
   powerpc/crc: delete obsolete crc-vpmsum_test.c
   MAINTAINERS: add entry for CRC library

  MAINTAINERS                                   |  11 +
  arch/arm/Kconfig                              |   1 +
  arch/arm/crypto/Kconfig                       |  11 -
  arch/arm/crypto/Makefile                      |   2 -
  arch/arm/crypto/crct10dif-ce-glue.c           | 124 ---
  arch/arm/lib/Makefile                         |   3 +
  .../crc-t10dif-core.S}                        |   0
  arch/arm/lib/crc-t10dif-glue.c                |  77 ++
  arch/arm64/Kconfig                            |   1 +
  arch/arm64/configs/defconfig                  |   1 -
  arch/arm64/crypto/Kconfig                     |  10 -
  arch/arm64/crypto/Makefile                    |   3 -
  arch/arm64/crypto/crct10dif-ce-glue.c         | 132 ---
  arch/arm64/lib/Makefile                       |   3 +
  .../crc-t10dif-core.S}                        |   0
  arch/arm64/lib/crc-t10dif-glue.c              |  78 ++
  arch/m68k/configs/amiga_defconfig             |   1 -
  arch/m68k/configs/apollo_defconfig            |   1 -
  arch/m68k/configs/atari_defconfig             |   1 -
  arch/m68k/configs/bvme6000_defconfig          |   1 -
  arch/m68k/configs/hp300_defconfig             |   1 -
  arch/m68k/configs/mac_defconfig               |   1 -
  arch/m68k/configs/multi_defconfig             |   1 -
  arch/m68k/configs/mvme147_defconfig           |   1 -
  arch/m68k/configs/mvme16x_defconfig           |   1 -
  arch/m68k/configs/q40_defconfig               |   1 -
  arch/m68k/configs/sun3_defconfig              |   1 -
  arch/m68k/configs/sun3x_defconfig             |   1 -
  arch/powerpc/Kconfig                          |   1 +
  arch/powerpc/configs/powernv_defconfig        |   1 -
  arch/powerpc/configs/ppc64_defconfig          |   2 -
  arch/powerpc/crypto/Kconfig                   |  20 -
  arch/powerpc/crypto/Makefile                  |   3 -
  arch/powerpc/crypto/crc-vpmsum_test.c         | 133 ---
  arch/powerpc/lib/Makefile                     |   3 +
  .../crc-t10dif-glue.c}                        |  69 +-
  .../{crypto => lib}/crct10dif-vpmsum_asm.S    |   2 +-
  arch/s390/configs/debug_defconfig             |   1 -
  arch/x86/Kconfig                              |   1 +
  arch/x86/crypto/Kconfig                       |  10 -
  arch/x86/crypto/Makefile                      |   3 -
  arch/x86/crypto/crct10dif-pclmul_glue.c       | 143 ---
  arch/x86/lib/Makefile                         |   3 +
  arch/x86/lib/crc-t10dif-glue.c                |  51 ++
  .../{crypto => lib}/crct10dif-pcl-asm_64.S    |   0
  crypto/Kconfig                                |   1 +
  crypto/Makefile                               |   3 +-
  crypto/crct10dif_common.c                     |  82 --
  crypto/crct10dif_generic.c                    |  82 +-
  include/linux/crc-t10dif.h                    |  28 +-
  lib/Kconfig                                   |  43 +-
  lib/Kconfig.debug                             |  20 +
  lib/Makefile                                  |   2 +-
  lib/crc-t10dif.c                              | 156 +---
  lib/crc32test.c                               | 852 ------------------
  lib/crc_kunit.c                               | 428 +++++++++
  .../testing/selftests/arm64/fp/kernel-test.c  |   3 +-
  57 files changed, 867 insertions(+), 1748 deletions(-)
  delete mode 100644 arch/arm/crypto/crct10dif-ce-glue.c
  rename arch/arm/{crypto/crct10dif-ce-core.S => lib/crc-t10dif-core.S} 
(100%)
  create mode 100644 arch/arm/lib/crc-t10dif-glue.c
  delete mode 100644 arch/arm64/crypto/crct10dif-ce-glue.c
  rename arch/arm64/{crypto/crct10dif-ce-core.S => 
lib/crc-t10dif-core.S} (100%)
  create mode 100644 arch/arm64/lib/crc-t10dif-glue.c
  delete mode 100644 arch/powerpc/crypto/crc-vpmsum_test.c
  rename arch/powerpc/{crypto/crct10dif-vpmsum_glue.c => 
lib/crc-t10dif-glue.c} (50%)
  rename arch/powerpc/{crypto => lib}/crct10dif-vpmsum_asm.S (99%)
  delete mode 100644 arch/x86/crypto/crct10dif-pclmul_glue.c
  create mode 100644 arch/x86/lib/crc-t10dif-glue.c
  rename arch/x86/{crypto => lib}/crct10dif-pcl-asm_64.S (100%)
  delete mode 100644 crypto/crct10dif_common.c
  delete mode 100644 lib/crc32test.c
  create mode 100644 lib/crc_kunit.c

Good job. It's great to see the code being simplified.

I still want to submit an optimization patch about CRC-T10DIF for RISC-V.

I don't know if it would be more appropriate for me to rewrite a patch 
after your patch is officially applied.

What do you think?