[PATCH 00/13] Architecture-optimized SHA-256 library API

[Eric Biggers <ebiggers@kernel.org>]

This is based on cryptodev commit bf0b4f15267ca404 plus the series
https://lore.kernel.org/linux-crypto/20250422152716.5923-1-ebiggers@kernel.org/.
It can also be retrieved from:

    git fetch https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git sha256-lib-v1

Following the example of several other algorithms (e.g. CRC32, ChaCha,
Poly1305, BLAKE2s), this series refactors the kernel's existing
architecture-optimized SHA-256 code to be available via the library API,
instead of just via the crypto_shash API as it was before.  It also
reimplements the SHA-256 crypto_shash API on top of the library API.

This makes it possible to use the SHA-256 library in
performance-critical cases.  The new design is also much simpler, with a
negative diffstat of over 1200 lines.  Finally, this also fixes the
longstanding issue where the arch-optimized SHA-256 was disabled by
default, so people often forgot to enable it.

For now the SHA-256 library is well-covered by the crypto_shash
self-tests, but I plan to add a test for the library directly later.
I've fully tested this series on arm, arm64, riscv, and x86.  On mips,
powerpc, s390, and sparc I've only been able to partially test it, since
QEMU does not support the SHA-256 instructions on those platforms.  If
anyone with access to a mips, powerpc, s390, or sparc system that has
SHA-256 instructions can verify that the crypto self-tests still pass,
that would be appreciated.  But I don't expect any issues, especially
since the new code is more straightforward than the old code.

Eric Biggers (13):
  crypto: sha256 - support arch-optimized lib and expose through shash
  crypto: arm/sha256 - implement library instead of shash
  crypto: arm64/sha256 - remove obsolete chunking logic
  crypto: arm64/sha256 - implement library instead of shash
  crypto: mips/sha256 - implement library instead of shash
  crypto: powerpc/sha256 - implement library instead of shash
  crypto: riscv/sha256 - implement library instead of shash
  crypto: s390/sha256 - implement library instead of shash
  crypto: sparc - move opcodes.h into asm directory
  crypto: sparc/sha256 - implement library instead of shash
  crypto: x86/sha256 - implement library instead of shash
  crypto: sha256 - remove sha256_base.h
  crypto: lib/sha256 - improve function prototypes

 arch/arm/configs/exynos_defconfig             |   1 -
 arch/arm/configs/milbeaut_m10v_defconfig      |   1 -
 arch/arm/configs/multi_v7_defconfig           |   1 -
 arch/arm/configs/omap2plus_defconfig          |   1 -
 arch/arm/configs/pxa_defconfig                |   1 -
 arch/arm/crypto/Kconfig                       |  21 -
 arch/arm/crypto/Makefile                      |   8 +-
 arch/arm/crypto/sha2-ce-glue.c                |  87 ----
 arch/arm/crypto/sha256_glue.c                 | 107 -----
 arch/arm/crypto/sha256_glue.h                 |   9 -
 arch/arm/crypto/sha256_neon_glue.c            |  75 ---
 arch/arm/lib/crypto/.gitignore                |   1 +
 arch/arm/lib/crypto/Kconfig                   |   6 +
 arch/arm/lib/crypto/Makefile                  |   8 +-
 arch/arm/{ => lib}/crypto/sha256-armv4.pl     |   0
 .../sha2-ce-core.S => lib/crypto/sha256-ce.S} |  10 +-
 arch/arm/lib/crypto/sha256.c                  |  64 +++
 arch/arm64/configs/defconfig                  |   1 -
 arch/arm64/crypto/Kconfig                     |  19 -
 arch/arm64/crypto/Makefile                    |  13 +-
 arch/arm64/crypto/sha2-ce-glue.c              | 138 ------
 arch/arm64/crypto/sha256-glue.c               | 171 -------
 arch/arm64/lib/crypto/.gitignore              |   1 +
 arch/arm64/lib/crypto/Kconfig                 |   5 +
 arch/arm64/lib/crypto/Makefile                |   9 +-
 .../crypto/sha2-armv8.pl}                     |   0
 .../sha2-ce-core.S => lib/crypto/sha256-ce.S} |  36 +-
 arch/arm64/lib/crypto/sha256.c                |  75 +++
 arch/mips/cavium-octeon/Kconfig               |   6 +
 .../mips/cavium-octeon/crypto/octeon-sha256.c | 135 ++----
 arch/mips/configs/cavium_octeon_defconfig     |   1 -
 arch/mips/crypto/Kconfig                      |  10 -
 arch/powerpc/crypto/Kconfig                   |  11 -
 arch/powerpc/crypto/Makefile                  |   2 -
 arch/powerpc/crypto/sha256-spe-glue.c         | 128 ------
 arch/powerpc/lib/crypto/Kconfig               |   6 +
 arch/powerpc/lib/crypto/Makefile              |   3 +
 .../powerpc/{ => lib}/crypto/sha256-spe-asm.S |   0
 arch/powerpc/lib/crypto/sha256.c              |  70 +++
 arch/riscv/crypto/Kconfig                     |  11 -
 arch/riscv/crypto/Makefile                    |   3 -
 arch/riscv/crypto/sha256-riscv64-glue.c       | 125 -----
 arch/riscv/lib/crypto/Kconfig                 |   7 +
 arch/riscv/lib/crypto/Makefile                |   3 +
 .../sha256-riscv64-zvknha_or_zvknhb-zvkb.S    |   4 +-
 arch/riscv/lib/crypto/sha256.c                |  62 +++
 arch/s390/configs/debug_defconfig             |   1 -
 arch/s390/configs/defconfig                   |   1 -
 arch/s390/crypto/Kconfig                      |  10 -
 arch/s390/crypto/Makefile                     |   1 -
 arch/s390/crypto/sha256_s390.c                | 144 ------
 arch/s390/lib/crypto/Kconfig                  |   6 +
 arch/s390/lib/crypto/Makefile                 |   2 +
 arch/s390/lib/crypto/sha256.c                 |  47 ++
 arch/sparc/crypto/Kconfig                     |  10 -
 arch/sparc/crypto/Makefile                    |   2 -
 arch/sparc/crypto/aes_asm.S                   |   3 +-
 arch/sparc/crypto/aes_glue.c                  |   3 +-
 arch/sparc/crypto/camellia_asm.S              |   3 +-
 arch/sparc/crypto/camellia_glue.c             |   3 +-
 arch/sparc/crypto/des_asm.S                   |   3 +-
 arch/sparc/crypto/des_glue.c                  |   3 +-
 arch/sparc/crypto/md5_asm.S                   |   3 +-
 arch/sparc/crypto/md5_glue.c                  |   3 +-
 arch/sparc/crypto/sha1_asm.S                  |   3 +-
 arch/sparc/crypto/sha1_glue.c                 |   3 +-
 arch/sparc/crypto/sha256_glue.c               | 129 ------
 arch/sparc/crypto/sha512_asm.S                |   3 +-
 arch/sparc/crypto/sha512_glue.c               |   3 +-
 arch/sparc/{crypto => include/asm}/opcodes.h  |   6 +-
 arch/sparc/lib/Makefile                       |   1 +
 arch/sparc/lib/crc32c_asm.S                   |   3 +-
 arch/sparc/lib/crypto/Kconfig                 |   8 +
 arch/sparc/lib/crypto/Makefile                |   4 +
 arch/sparc/lib/crypto/sha256.c                |  64 +++
 arch/sparc/{ => lib}/crypto/sha256_asm.S      |   5 +-
 arch/x86/crypto/Kconfig                       |  14 -
 arch/x86/crypto/Makefile                      |   3 -
 arch/x86/crypto/sha256_ssse3_glue.c           | 432 ------------------
 arch/x86/lib/crypto/Kconfig                   |   7 +
 arch/x86/lib/crypto/Makefile                  |   3 +
 arch/x86/{ => lib}/crypto/sha256-avx-asm.S    |  12 +-
 arch/x86/{ => lib}/crypto/sha256-avx2-asm.S   |  12 +-
 .../crypto/sha256-ni-asm.S}                   |  36 +-
 arch/x86/{ => lib}/crypto/sha256-ssse3-asm.S  |  14 +-
 arch/x86/lib/crypto/sha256.c                  |  74 +++
 crypto/Kconfig                                |   1 +
 crypto/Makefile                               |   3 +-
 crypto/sha256.c                               | 201 ++++++++
 crypto/sha256_generic.c                       | 102 -----
 include/crypto/internal/sha2.h                |  28 ++
 include/crypto/sha2.h                         |  23 +-
 include/crypto/sha256_base.h                  | 180 --------
 lib/crypto/Kconfig                            |  22 +
 lib/crypto/sha256.c                           | 130 +++++-
 95 files changed, 1008 insertions(+), 2225 deletions(-)
 delete mode 100644 arch/arm/crypto/sha2-ce-glue.c
 delete mode 100644 arch/arm/crypto/sha256_glue.c
 delete mode 100644 arch/arm/crypto/sha256_glue.h
 delete mode 100644 arch/arm/crypto/sha256_neon_glue.c
 rename arch/arm/{ => lib}/crypto/sha256-armv4.pl (100%)
 rename arch/arm/{crypto/sha2-ce-core.S => lib/crypto/sha256-ce.S} (91%)
 create mode 100644 arch/arm/lib/crypto/sha256.c
 delete mode 100644 arch/arm64/crypto/sha2-ce-glue.c
 delete mode 100644 arch/arm64/crypto/sha256-glue.c
 rename arch/arm64/{crypto/sha512-armv8.pl => lib/crypto/sha2-armv8.pl} (100%)
 rename arch/arm64/{crypto/sha2-ce-core.S => lib/crypto/sha256-ce.S} (80%)
 create mode 100644 arch/arm64/lib/crypto/sha256.c
 delete mode 100644 arch/powerpc/crypto/sha256-spe-glue.c
 rename arch/powerpc/{ => lib}/crypto/sha256-spe-asm.S (100%)
 create mode 100644 arch/powerpc/lib/crypto/sha256.c
 delete mode 100644 arch/riscv/crypto/sha256-riscv64-glue.c
 rename arch/riscv/{ => lib}/crypto/sha256-riscv64-zvknha_or_zvknhb-zvkb.S (98%)
 create mode 100644 arch/riscv/lib/crypto/sha256.c
 delete mode 100644 arch/s390/crypto/sha256_s390.c
 create mode 100644 arch/s390/lib/crypto/sha256.c
 delete mode 100644 arch/sparc/crypto/sha256_glue.c
 rename arch/sparc/{crypto => include/asm}/opcodes.h (96%)
 create mode 100644 arch/sparc/lib/crypto/Kconfig
 create mode 100644 arch/sparc/lib/crypto/Makefile
 create mode 100644 arch/sparc/lib/crypto/sha256.c
 rename arch/sparc/{ => lib}/crypto/sha256_asm.S (95%)
 delete mode 100644 arch/x86/crypto/sha256_ssse3_glue.c
 rename arch/x86/{ => lib}/crypto/sha256-avx-asm.S (98%)
 rename arch/x86/{ => lib}/crypto/sha256-avx2-asm.S (98%)
 rename arch/x86/{crypto/sha256_ni_asm.S => lib/crypto/sha256-ni-asm.S} (85%)
 rename arch/x86/{ => lib}/crypto/sha256-ssse3-asm.S (98%)
 create mode 100644 arch/x86/lib/crypto/sha256.c
 create mode 100644 crypto/sha256.c
 delete mode 100644 crypto/sha256_generic.c
 create mode 100644 include/crypto/internal/sha2.h
 delete mode 100644 include/crypto/sha256_base.h

-- 
2.49.0