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Add explanation for aesce limitation

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Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
This commit is contained in:
Jerry Yu 2023-02-24 11:42:07 +08:00
parent aa18c4bf96
commit c66deda4c5
1 changed files with 4 additions and 0 deletions
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4
include/mbedtls/mbedtls_config.h
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@ -2079,6 +2079,10 @@
* of \c -march=armv8-a+crypto . * of \c -march=armv8-a+crypto .
* *
* \warning `MBEDTLS_SHA512_USE_A64_CRYPTO_*` should be disabled when enabled * \warning `MBEDTLS_SHA512_USE_A64_CRYPTO_*` should be disabled when enabled
* because unexpected instruction will be generated in AESCE module.
* `MBEDTLS_SHA512_USE_A64_CRYPTO_*` requires \c -march=armv8.2-a+sha3,
* compiler optimizes the code with `eor3` that is part of sha3
* extension and unexpected in AESCE.
* *
* \warning Runtime detection only works on linux. For non-linux operation * \warning Runtime detection only works on linux. For non-linux operation
* system, crypto extension MUST be supported by CPU. * system, crypto extension MUST be supported by CPU.