cpu: add crypto extensions detection for riscv64

This CL adds RISC-V cryptography extensions detection.
Direct detection of the extensions zvkned, zvknhb, zvksed and
zvksh is not supported, since the crypto spec requires these
extensions implemented with data independent timing (zkt).

However, their presence may be inferred by checking for
the shorthand extensions: zvkn, zvknc, zvkng, zvks, zvksc, zvksg.

Change-Id: Ic00038cebf1b9f77426876b06b08f206473ad6fb
Reviewed-on: https://go-review.googlesource.com/c/sys/+/664375
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Pengcheng Wang <wangpengcheng.pp@bytedance.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
3 files changed
tree: 04fab4268f01c0b051401eee8e66e319485e23a4
  1. cpu/
  2. execabs/
  3. plan9/
  4. unix/
  5. windows/
  6. .gitattributes
  7. .gitignore
  8. codereview.cfg
  9. CONTRIBUTING.md
  10. go.mod
  11. LICENSE
  12. PATENTS
  13. README.md
README.md

sys

Go Reference

This repository holds supplemental Go packages for low-level interactions with the operating system.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://go.dev/doc/contribute.

The git repository is https://go.googlesource.com/sys.

The main issue tracker for the sys repository is located at https://go.dev/issues. Prefix your issue with “x/sys:” in the subject line, so it is easy to find.