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SECLIB-667: Accelerate SHA-256 with A64 crypto extensions

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Provide an additional pair of #defines, MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT
and MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY. At most one of them may be
specified. If used, it is necessary to compile with -march=armv8-a+crypto.

The MBEDTLS_SHA256_PROCESS_ALT and MBEDTLS_SHA256_ALT mechanisms
continue to work, and are mutually exclusive with A64_CRYPTO.

There should be minimal code size impact if no A64_CRYPTO option is set.

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
This commit is contained in:
Tom Cosgrove 2022-02-20 22:25:31 +00:00
parent 9b545c04f7
commit f3ebd90a1c
6 changed files with 364 additions and 11 deletions
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1
scripts/config.py
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@ -198,6 +198,7 @@ EXCLUDE_FROM_FULL = frozenset([
'MBEDTLS_PSA_CRYPTO_SPM', # platform dependency (PSA SPM)
'MBEDTLS_PSA_INJECT_ENTROPY', # build dependency (hook functions)
'MBEDTLS_RSA_NO_CRT', # influences the use of RSA in X.509 and TLS
'MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY', # interacts with *_USE_A64_CRYPTO_ONLY
'MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN', # build dependency (clang+memsan)
'MBEDTLS_TEST_CONSTANT_FLOW_VALGRIND', # build dependency (valgrind headers)
'MBEDTLS_X509_REMOVE_INFO', # removes a feature