[v6,0/3] Implement GCM ghash using Zbc and Zbkb extensions

From: Heiko Stuebner <heiko.stuebner@vrull.eu>

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 v6:
- rebase on top of riscv/for-next
- rebase on top of Samuel Ortiz Arch-random series
  https://lore.kernel.org/r/20230709115549.2666557-1-sameo@rivosinc.com
  as it has the nicer Zbc + Zbkb integration for extensions and hwprobe
- update perl code with better licensing text (Eric)
  This was also merged into the original openSSL sources
- add SPDX license identifier (Eric)
- drop unneeded fallback element in the private struct (Herbert)

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 (3):
  RISC-V: expose Zbc as Kconfig option
  RISC-V: hook new crypto subdir into build-system
  RISC-V: crypto: add accelerated GCM GHASH implementation

 arch/riscv/Kbuild                      |   1 +
 arch/riscv/Kconfig                     |  23 ++
 arch/riscv/crypto/Kconfig              |  18 ++
 arch/riscv/crypto/Makefile             |  18 ++
 arch/riscv/crypto/ghash-riscv64-glue.c | 291 +++++++++++++++++
 arch/riscv/crypto/ghash-riscv64-zbc.pl | 430 +++++++++++++++++++++++++
 arch/riscv/crypto/riscv.pm             | 261 +++++++++++++++
 crypto/Kconfig                         |   3 +
 8 files changed, 1045 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