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c0a9559877
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>