leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
4bf7e7a19d
linux/arch/arm64/crypto
History
Ard Biesheuvel 4bf7e7a19d crypto: arm64/chacha20 - move kernel mode neon en/disable into loop 
When kernel mode NEON was first introduced on arm64, the preserve and
restore of the userland NEON state was completely unoptimized, and
involved saving all registers on each call to kernel_neon_begin(),
and restoring them on each call to kernel_neon_end(). For this reason,
the NEON crypto code that was introduced at the time keeps the NEON
enabled throughout the execution of the crypto API methods, which may
include calls back into the crypto API that could result in memory
allocation or other actions that we should avoid when running with
preemption disabled.

Since then, we have optimized the kernel mode NEON handling, which now
restores lazily (upon return to userland), and so the preserve action
is only costly the first time it is called after entering the kernel.

So let's put the kernel_neon_begin() and kernel_neon_end() calls around
the actual invocations of the NEON crypto code, and run the remainder of
the code with kernel mode NEON disabled (and preemption enabled)

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-03-16 23:35:55 +08:00
..
.gitignore crypto: arm64/sha2 - add generated .S files to .gitignore 2016-11-29 16:06:56 +08:00
aes-ce-ccm-core.S crypto: arm64/aes-ce-cipher - match round key endianness with generic code 2017-08-04 09:27:19 +08:00
aes-ce-ccm-glue.c crypto: arm64/aes-ce-ccm - move kernel mode neon en/disable into loop 2018-03-16 23:35:54 +08:00
aes-ce-core.S crypto: arm64/aes-ce-cipher - move assembler code to .S file 2017-11-29 17:33:30 +11:00
aes-ce-glue.c crypto: arm64/aes-ce-cipher - move assembler code to .S file 2017-11-29 17:33:30 +11:00
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 crypto: arm64/aes-ce-cipher - match round key endianness with generic code 2017-08-04 09:27:19 +08:00
aes-cipher-core.S crypto: arm64/aes-cipher - move S-box to .rodata section 2018-01-18 23:00:30 +11:00
aes-cipher-glue.c crypto: arm64/aes - add scalar implementation 2017-01-13 00:26:49 +08:00
aes-ctr-fallback.h crypto: arm64/aes-blk - add a non-SIMD fallback for synchronous CTR 2017-08-04 09:27:21 +08:00
aes-glue.c crypto: arm64/aes-blk - move kernel mode neon en/disable into loop 2018-03-16 23:35:54 +08:00
aes-modes.S crypto: arm64/aes-blk - move kernel mode neon en/disable into loop 2018-03-16 23:35:54 +08:00
aes-neon.S crypto: arm64/aes-neon - move literal data to .rodata section 2018-01-18 23:00:30 +11:00
aes-neonbs-core.S crypto: arm64/aes - don't use IV buffer to return final keystream block 2017-02-03 18:16:20 +08:00
aes-neonbs-glue.c crypto: arm64/aes-bs - move kernel mode neon en/disable into loop 2018-03-16 23:35:55 +08:00
chacha20-neon-core.S crypto: arm64/chacha20 - implement NEON version based on SSE3 code 2017-01-13 00:26:48 +08:00
chacha20-neon-glue.c crypto: arm64/chacha20 - move kernel mode neon en/disable into loop 2018-03-16 23:35:55 +08:00
crc32-ce-core.S crypto: arm64/crc32 - move literal data to .rodata section 2018-01-18 23:00:31 +11:00
crc32-ce-glue.c crypto: hash - annotate algorithms taking optional key 2018-01-12 23:03:35 +11:00
crct10dif-ce-core.S crypto: arm64/crct10dif - move literal data to .rodata section 2018-01-18 23:00:31 +11:00
crct10dif-ce-glue.c crypto: arm64/crct10dif - add non-SIMD generic fallback 2017-08-04 09:27:16 +08:00
ghash-ce-core.S crypto: arm64/ghash - add NEON accelerated fallback for 64-bit PMULL 2017-08-04 09:27:25 +08:00
ghash-ce-glue.c crypto: arm64/ghash - add NEON accelerated fallback for 64-bit PMULL 2017-08-04 09:27:25 +08:00
Kconfig crypto: arm64/speck - add NEON-accelerated implementation of Speck-XTS 2018-03-16 23:35:41 +08:00
Makefile crypto: arm64/speck - add NEON-accelerated implementation of Speck-XTS 2018-03-16 23:35:41 +08:00
sha1-ce-core.S crypto: arm64/sha1-ce - get rid of literal pool 2018-01-18 23:00:33 +11:00
sha1-ce-glue.c crypto: arm64/sha1-ce - add non-SIMD generic fallback 2017-08-04 09:27:18 +08:00
sha2-ce-core.S crypto: arm64/sha2-ce - move the round constant table to .rodata section 2018-01-18 23:00:32 +11:00
sha2-ce-glue.c crypto: arm64/sha2-ce - add non-SIMD scalar fallback 2017-08-04 09:27:19 +08:00
sha3-ce-core.S crypto: arm64/sha3 - new v8.2 Crypto Extensions implementation 2018-01-26 01:10:35 +11:00
sha3-ce-glue.c crypto: arm64/sha3 - new v8.2 Crypto Extensions implementation 2018-01-26 01:10:35 +11:00
sha256-core.S_shipped crypto: arm64/sha2 - integrate OpenSSL implementations of SHA256/SHA512 2016-11-28 19:58:05 +08:00
sha256-glue.c crypto: arm64/sha2-ce - add non-SIMD scalar fallback 2017-08-04 09:27:19 +08:00
sha512-armv8.pl crypto: arm64/sha2 - integrate OpenSSL implementations of SHA256/SHA512 2016-11-28 19:58:05 +08:00
sha512-ce-core.S crypto: arm64/sha512 - fix/improve new v8.2 Crypto Extensions code 2018-01-26 01:10:36 +11:00
sha512-ce-glue.c crypto: arm64 - implement SHA-512 using special instructions 2018-01-18 22:52:24 +11:00
sha512-core.S_shipped crypto: arm64/sha2 - integrate OpenSSL implementations of SHA256/SHA512 2016-11-28 19:58:05 +08:00
sha512-glue.c crypto: arm64/sha512 - fix/improve new v8.2 Crypto Extensions code 2018-01-26 01:10:36 +11:00
sm3-ce-core.S crypto: arm64/sm3 - new v8.2 Crypto Extensions implementation 2018-01-26 01:10:35 +11:00
sm3-ce-glue.c crypto: arm64/sm3 - new v8.2 Crypto Extensions implementation 2018-01-26 01:10:35 +11:00
speck-neon-core.S crypto: arm64/speck - add NEON-accelerated implementation of Speck-XTS 2018-03-16 23:35:41 +08:00
speck-neon-glue.c crypto: arm64/speck - add NEON-accelerated implementation of Speck-XTS 2018-03-16 23:35:41 +08:00