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c4fc6328d6
linux/arch/arm64/crypto
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Ard Biesheuvel c4fc6328d6 crypto: arm64/chacha - simplify tail block handling 
Based on lessons learnt from optimizing the 32-bit version of this driver,
we can simplify the arm64 version considerably, by reordering the final
two stores when the last block is not a multiple of 64 bytes. This removes
the need to use permutation instructions to calculate the elements that are
clobbered by the final overlapping store, given that the store of the
penultimate block now follows it, and that one carries the correct values
for those elements already.

While at it, simplify the overlapping loads as well, by calculating the
address of the final overlapping load upfront, and switching to this
address for every load that would otherwise extend past the end of the
source buffer.

There is no impact on performance, but the resulting code is substantially
smaller and easier to follow.

Cc: Eric Biggers <ebiggers@google.com>
Cc: "Jason A . Donenfeld" <Jason@zx2c4.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-11-13 20:38:55 +11:00
..
.gitignore SPDX patches for 5.7-rc1. 2020-04-03 13:12:26 -07:00
aes-ce-ccm-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
aes-ce-ccm-glue.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
aes-ce-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
aes-ce-glue.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
aes-ce-setkey.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
aes-ce.S arm64: crypto: Modernize names for AES function macros 2020-03-09 17:35:04 +00:00
aes-cipher-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
aes-cipher-glue.c crypto: arm64/aes-ce-cipher - use AES library as fallback 2019-07-26 14:58:09 +10:00
aes-glue.c crypto: arm64/aes-glue - use crypto_shash_tfm_digest() 2020-05-08 15:32:13 +10:00
aes-modes.S arm64: crypto: Modernize names for AES function macros 2020-03-09 17:35:04 +00:00
aes-neon.S arm64: crypto: Modernize names for AES function macros 2020-03-09 17:35:04 +00:00
aes-neonbs-core.S crypto: arm64: Use x16 with indirect branch to bti_c 2020-10-06 18:14:47 +01:00
aes-neonbs-glue.c crypto: arm/neon - memzero_explicit aes-cbc key 2020-03-20 14:36:51 +11:00
chacha-neon-core.S crypto: arm64/chacha - simplify tail block handling 2020-11-13 20:38:55 +11:00
chacha-neon-glue.c crypto: arch/lib - limit simd usage to 4k chunks 2020-04-30 15:16:59 +10:00
crct10dif-ce-core.S crypto: arm64 - Consistently enable extension 2020-04-24 17:42:16 +10:00
crct10dif-ce-glue.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ghash-ce-core.S arm64: crypto: Modernize some extra assembly annotations 2020-03-09 17:35:00 +00:00
ghash-ce-glue.c crypto: hash - Use memzero_explicit() for clearing state 2020-10-30 17:35:03 +11:00
Kconfig crypto: arm64/poly1305 - incorporate OpenSSL/CRYPTOGAMS NEON implementation 2019-11-17 09:02:41 +08:00
Makefile crypto: arm64/poly1305 - incorporate OpenSSL/CRYPTOGAMS NEON implementation 2019-11-17 09:02:41 +08:00
nh-neon-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
nhpoly1305-neon-glue.c crypto: arch/nhpoly1305 - process in explicit 4k chunks 2020-04-30 15:16:59 +10:00
poly1305-armv8.pl crypto: arm64/poly1305-neon - reorder PAC authentication with SP update 2020-11-06 14:29:11 +11:00
poly1305-core.S_shipped crypto: arm64/poly1305-neon - reorder PAC authentication with SP update 2020-11-06 14:29:11 +11:00
poly1305-glue.c crypto: hash - Use memzero_explicit() for clearing state 2020-10-30 17:35:03 +11:00
sha1-ce-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
sha1-ce-glue.c crypto: arm64/sha - Add declarations for assembly variables 2020-09-04 17:57:15 +10:00
sha2-ce-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
sha2-ce-glue.c crypto: arm64/sha - Add declarations for assembly variables 2020-09-04 17:57:15 +10:00
sha3-ce-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
sha3-ce-glue.c crypto: hash - Use memzero_explicit() for clearing state 2020-10-30 17:35:03 +11:00
sha256-core.S_shipped crypto: clarify licensing of OpenSSL asm code 2018-05-31 00:13:44 +08:00
sha256-glue.c crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h 2020-05-08 15:32:17 +10:00
sha512-armv8.pl crypto: clarify licensing of OpenSSL asm code 2018-05-31 00:13:44 +08:00
sha512-ce-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
sha512-ce-glue.c crypto: arm64/sha - fix function types 2019-12-11 16:36:55 +08:00
sha512-core.S_shipped crypto: clarify licensing of OpenSSL asm code 2018-05-31 00:13:44 +08:00
sha512-glue.c crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h 2020-05-08 15:32:17 +10:00
sm3-ce-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
sm3-ce-glue.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sm4-ce-core.S crypto: arm64 - Use modern annotations for assembly functions 2019-12-20 14:58:35 +08:00
sm4-ce-glue.c crypto: arm64 - convert to use crypto_simd_usable() 2019-03-22 20:57:27 +08:00