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authorVladis Dronov <vdronov@redhat.com>2022-05-08 15:09:44 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2022-05-13 11:24:49 +0200
commit349d03ffd5f62c298fd667ffa397c3fdc5c6194b (patch)
treefe1872ab1aa78cdcb013cbd5ea97331a89a1f5c4 /drivers/crypto/Kconfig
parentcrypto: talitos - Uniform coding style with defined variable (diff)
downloadlinux-349d03ffd5f62c298fd667ffa397c3fdc5c6194b.tar.xz
linux-349d03ffd5f62c298fd667ffa397c3fdc5c6194b.zip
crypto: s390 - add crypto library interface for ChaCha20
Implement a crypto library interface for the s390-native ChaCha20 cipher algorithm. This allows us to stop to select CRYPTO_CHACHA20 and instead select CRYPTO_ARCH_HAVE_LIB_CHACHA. This allows BIG_KEYS=y not to build a whole ChaCha20 crypto infrastructure as a built-in, but build a smaller CRYPTO_LIB_CHACHA instead. Make CRYPTO_CHACHA_S390 config entry to look like similar ones on other architectures. Remove CRYPTO_ALGAPI select as anyway it is selected by CRYPTO_SKCIPHER. Add a new test module and a test script for ChaCha20 cipher and its interfaces. Here are test results on an idle z15 machine: Data | Generic crypto TFM | s390 crypto TFM | s390 lib size | enc dec | enc dec | enc dec -----+--------------------+------------------+---------------- 512b | 1545ns 1295ns | 604ns 446ns | 430ns 407ns 4k | 9536ns 9463ns | 2329ns 2174ns | 2170ns 2154ns 64k | 149.6us 149.3us | 34.4us 34.5us | 33.9us 33.1us 6M | 23.61ms 23.11ms | 4223us 4160us | 3951us 4008us 60M | 143.9ms 143.9ms | 33.5ms 33.2ms | 32.2ms 32.1ms Signed-off-by: Vladis Dronov <vdronov@redhat.com> Reviewed-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/Kconfig')
-rw-r--r--drivers/crypto/Kconfig4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 7b2d138bc83e..ee99c02c84e8 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -216,9 +216,9 @@ config CRYPTO_AES_S390
config CRYPTO_CHACHA_S390
tristate "ChaCha20 stream cipher"
depends on S390
- select CRYPTO_ALGAPI
select CRYPTO_SKCIPHER
- select CRYPTO_CHACHA20
+ select CRYPTO_LIB_CHACHA_GENERIC
+ select CRYPTO_ARCH_HAVE_LIB_CHACHA
help
This is the s390 SIMD implementation of the ChaCha20 stream
cipher (RFC 7539).