[PATCH v5 0/4] Implement GCM ghash using Zbc and Zbkb extensions

[Heiko Stuebner]

From: Heiko Stuebner <heiko.stuebner@xxxxxxxx>

This was originally part of my vector crypto series, but was part
of a separate openssl merge request implementing GCM ghash as using
non-vector extensions.

As that pull-request
    https://github.com/openssl/openssl/pull/20078
got merged recently into openssl, we could also check if this could
go into the kernel as well and provide a base for further accelerated
cryptographic support.

Changes in v5:
- rebased on top of 6.4-based riscv/next
- code from openssl is now dual-licensed under Apache + BSD
  see https://github.com/openssl/openssl/pull/20649
- separate init functions instead of creating them with macros (Nathan)

Changes in v4:
- rebase on top of riscv/for-next
- split out the scalar crypto implementation from the vector series
- refresh code from openSSL to match exactly
- Remove RFC label, as Zbc and Zbkb are ratified and
  the cryptographic code was merged into openSSL

changes in v3:
- rebase on top of 6.3-rc2
- rebase on top of vector-v14 patchset
- add the missing Co-developed-by mentions to showcase
  the people that did the actual openSSL crypto code

changes in v2:
- rebased on 6.2 + zbb series, so don't include already
  applied changes anymore
- refresh code picked from openssl as that side matures
- more algorithms (SHA512, AES, SM3, SM4)

Heiko Stuebner (4):
  RISC-V: add Zbc extension detection
  RISC-V: add Zbkb extension detection
  RISC-V: hook new crypto subdir into build-system
  RISC-V: crypto: add accelerated GCM GHASH implementation

 arch/riscv/Kbuild                      |   1 +
 arch/riscv/Kconfig                     |  22 ++
 arch/riscv/crypto/Kconfig              |  18 ++
 arch/riscv/crypto/Makefile             |  18 ++
 arch/riscv/crypto/ghash-riscv64-glue.c | 296 +++++++++++++++++
 arch/riscv/crypto/ghash-riscv64-zbc.pl | 427 +++++++++++++++++++++++++
 arch/riscv/crypto/riscv.pm             | 258 +++++++++++++++
 arch/riscv/include/asm/hwcap.h         |   2 +
 arch/riscv/kernel/cpu.c                |   2 +
 arch/riscv/kernel/cpufeature.c         |   2 +
 crypto/Kconfig                         |   3 +
 11 files changed, 1049 insertions(+)
 create mode 100644 arch/riscv/crypto/Kconfig
 create mode 100644 arch/riscv/crypto/Makefile
 create mode 100644 arch/riscv/crypto/ghash-riscv64-glue.c
 create mode 100644 arch/riscv/crypto/ghash-riscv64-zbc.pl
 create mode 100644 arch/riscv/crypto/riscv.pm

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2.39.0