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| author |   Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-07-27 14:59:15 +0200 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2018-07-31 13:20:30 +0100 |
| commit | c7513c2a2714204d3588ecaa170ae628fd0d217e (patch) | |
| tree | cd4d59d8937424000afd8d7e0a138f8ebd82289b /arch | |
| parent | Linux 4.18-rc7 (diff) | |
| download | linux-dev-c7513c2a2714204d3588ecaa170ae628fd0d217e.tar.xz linux-dev-c7513c2a2714204d3588ecaa170ae628fd0d217e.zip | |
crypto/arm64: aes-ce-gcm - add missing kernel_neon_begin/end pair
Calling pmull_gcm_encrypt_block() requires kernel_neon_begin() and
kernel_neon_end() to be used since the routine touches the NEON
register file. Add the missing calls.
Also, since NEON register contents are not preserved outside of
a kernel mode NEON region, pass the key schedule array again.
Fixes: 7c50136a8aba ("crypto: arm64/aes-ghash - yield NEON after every ...")
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/crypto/ghash-ce-glue.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/arm64/crypto/ghash-ce-glue.c b/arch/arm64/crypto/ghash-ce-glue.c index 7cf0b1aa6ea8..8a10f1d7199a 100644 --- a/arch/arm64/crypto/ghash-ce-glue.c +++ b/arch/arm64/crypto/ghash-ce-glue.c @@ -488,9 +488,13 @@ static int gcm_decrypt(struct aead_request *req) err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE); } - if (walk.nbytes) - pmull_gcm_encrypt_block(iv, iv, NULL, + if (walk.nbytes) { + kernel_neon_begin(); + pmull_gcm_encrypt_block(iv, iv, ctx->aes_key.key_enc, num_rounds(&ctx->aes_key)); + kernel_neon_end(); + } + } else { __aes_arm64_encrypt(ctx->aes_key.key_enc, tag, iv, num_rounds(&ctx->aes_key)); |