3 Commits

Author	SHA1	Message	Date
Heiko Carstens	0a5f9b382c	s390/cpufeature: rework to allow more than only hwcap bits ... Rework cpufeature implementation to allow for various cpu feature indications, which is not only limited to hwcap bits. This is achieved by adding a sequential list of cpu feature numbers, where each of them is mapped to an entry which indicates what this number is about. Each entry contains a type member, which indicates what feature name space to look into (e.g. hwcap, or cpu facility). If wanted this allows also to automatically load modules only in e.g. z/VM configurations. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Steffen Eiden <seiden@linux.ibm.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com> Link: https://lore.kernel.org/r/20220713125644.16121-2-seiden@linux.ibm.com Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>	2022-07-19 16:18:49 +02:00
Vladis Dronov	349d03ffd5	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>	2022-05-13 17:24:49 +08:00
Patrick Steuer	b087dfab4d	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>	2021-12-06 14:42:24 +01:00