crypto: arm/aes-ce - yield the SIMD unit between scatterwalk steps

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Reduce the scope of the kernel_neon_begin/end regions so that the SIMD
unit is released (and thus preemption re-enabled) if the crypto operation
cannot be completed in a single scatterwalk step. This avoids scheduling
blackouts due to preemption being enabled for unbounded periods, resulting
in a more responsive system.

After this change, we can also permit the cipher_walk infrastructure to
sleep, so set the 'atomic' parameter to skcipher_walk_virt() to false as
well.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Ard Biesheuvel 2019-09-03 09:43:24 -07:00 • committed by Herbert Xu

parent fcb0e30df0

commit 46a22776bc

2 changed files with 34 additions and 35 deletions

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47

arch/arm/crypto/aes-ce-glue.c

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22

arch/arm/crypto/aes-neonbs-glue.c

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