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| author | Eric Biggers | 2018-06-18 15:33:23 -0700 |
|---|---|---|
| committer | Herbert Xu | 2018-07-01 23:31:46 +0800 |
| commit | a068b94d74ddb7776ca707b6d39d1ac0d2d057e6 (patch) | |
| tree | 77fce437ba5ed83d60589ad67432159902ac04b1 /arch/arm/Kconfig | |
| parent | 837bf7cc3b7504385ae0e829c72e470dfc27cf6c (diff) | |
crypto: arm/speck - fix building in Thumb2 mode
Building the kernel with CONFIG_THUMB2_KERNEL=y and
CONFIG_CRYPTO_SPECK_NEON set fails with the following errors:
arch/arm/crypto/speck-neon-core.S: Assembler messages:
arch/arm/crypto/speck-neon-core.S:419: Error: r13 not allowed here -- `bic sp,#0xf'
arch/arm/crypto/speck-neon-core.S:423: Error: r13 not allowed here -- `bic sp,#0xf'
arch/arm/crypto/speck-neon-core.S:427: Error: r13 not allowed here -- `bic sp,#0xf'
arch/arm/crypto/speck-neon-core.S:431: Error: r13 not allowed here -- `bic sp,#0xf'
The problem is that the 'bic' instruction can't operate on the 'sp'
register in Thumb2 mode. Fix it by using a temporary register. This
isn't in the main loop, so the performance difference is negligible.
This also matches what aes-neonbs-core.S does.
Reported-by: Stefan Agner <stefan@agner.ch>
Fixes: ede9622162fa ("crypto: arm/speck - add NEON-accelerated implementation of Speck-XTS")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/arm/Kconfig')
0 files changed, 0 insertions, 0 deletions