crypto: arm64/aes-ccm - reduce NEON begin/end calls for common case

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AES-CCM (as used in WPA2 CCMP, for instance) typically involves
authenticate-only data, and operates on a single network packet, and so
the common case is for the authenticate, en/decrypt and finalize SIMD
helpers to all be called exactly once in sequence. Since
kernel_neon_end() now involves manipulation of the preemption state as
well as the softirq mask state, let's reduce the number of times we are
forced to call it to only once if we are handling this common case.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Ard Biesheuvel 2021-08-27 09:03:41 +02:00 • committed by Herbert Xu

parent b3482635e5

commit 741691c446

2 changed files with 49 additions and 32 deletions

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arch/arm64/crypto/aes-ce-ccm-core.S

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80

arch/arm64/crypto/aes-ce-ccm-glue.c

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