diff options
| author | Patrick Steuer <patrick.steuer@de.ibm.com> | 2021-11-04 15:58:51 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2021-12-06 14:42:24 +0100 |
| commit | b087dfab4d3902681550fd1f5ff9c3e942059478 (patch) | |
| tree | acc95523edb8e6eac15e296eaf9ecb5b5ac889b5 /arch/s390/configs/debug_defconfig | |
| parent | Linux 5.16-rc4 (diff) | |
| download | linux-b087dfab4d3902681550fd1f5ff9c3e942059478.tar.xz linux-b087dfab4d3902681550fd1f5ff9c3e942059478.zip | |
s390/crypto: add SIMD implementation for ChaCha20
Add an implementation of the ChaCha20 stream cipher (see e.g. RFC 7539)
that makes use of z13's vector instruction set extension.
The original implementation is by Andy Polyakov which is
adapted for kernel use.
Four to six blocks are processed in parallel resulting in a performance
gain for inputs >= 256 bytes.
chacha20-generic
1 operation in 622 cycles (256 bytes)
1 operation in 2346 cycles (1024 bytes)
chacha20-s390
1 operation in 218 cycles (256 bytes)
1 operation in 647 cycles (1024 bytes)
Cc: Andy Polyakov <appro@openssl.org>
Reviewed-by: Harald Freudenberger <freude@de.ibm.com>
Signed-off-by: Patrick Steuer <patrick.steuer@de.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/configs/debug_defconfig')
| -rw-r--r-- | arch/s390/configs/debug_defconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig index b626bc6e0eaf..416257b7aad6 100644 --- a/arch/s390/configs/debug_defconfig +++ b/arch/s390/configs/debug_defconfig @@ -768,6 +768,7 @@ CONFIG_CRYPTO_SHA3_256_S390=m CONFIG_CRYPTO_SHA3_512_S390=m CONFIG_CRYPTO_DES_S390=m CONFIG_CRYPTO_AES_S390=m +CONFIG_CRYPTO_CHACHA_S390=m CONFIG_CRYPTO_GHASH_S390=m CONFIG_CRYPTO_CRC32_S390=y CONFIG_CRYPTO_DEV_VIRTIO=m |