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Add an implementation of SHA-256 and SHA-224 using the Zvknha or Zvknhb
extension. The assembly code is derived from OpenSSL code
(openssl/openssl#21923) that was dual-licensed so that it could be
reused in the kernel. Nevertheless, the assembly has been significantly
reworked for integration with the kernel, for example by using a regular
.S file instead of the so-called perlasm, using the assembler instead of
bare '.inst', and greatly reducing code duplication.
Co-developed-by: Charalampos Mitrodimas <charalampos.mitrodimas@vrull.eu>
Signed-off-by: Charalampos Mitrodimas <charalampos.mitrodimas@vrull.eu>
Co-developed-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Signed-off-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Co-developed-by: Phoebe Chen <phoebe.chen@sifive.com>
Signed-off-by: Phoebe Chen <phoebe.chen@sifive.com>
Signed-off-by: Jerry Shih <jerry.shih@sifive.com>
Co-developed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20240122002024.27477-8-ebiggers@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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