mirror of https://gitee.com/openkylin/linux.git
45fe93dff2
There are quite a number of occurrences in the kernel of the pattern
if (dst != src)
memcpy(dst, src, walk.total % AES_BLOCK_SIZE);
crypto_xor(dst, final, walk.total % AES_BLOCK_SIZE);
or
crypto_xor(keystream, src, nbytes);
memcpy(dst, keystream, nbytes);
where crypto_xor() is preceded or followed by a memcpy() invocation
that is only there because crypto_xor() uses its output parameter as
one of the inputs. To avoid having to add new instances of this pattern
in the arm64 code, which will be refactored to implement non-SIMD
fallbacks, add an alternative implementation called crypto_xor_cpy(),
taking separate input and output arguments. This removes the need for
the separate memcpy().
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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|---|---|---|
| .. | ||
| .gitignore | ||
| Kconfig | ||
| Makefile | ||
| aes.c | ||
| aes_cbc.c | ||
| aes_ctr.c | ||
| aes_xts.c | ||
| aesp8-ppc.h | ||
| aesp8-ppc.pl | ||
| ghash.c | ||
| ghashp8-ppc.pl | ||
| ppc-xlate.pl | ||
| vmx.c | ||