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crypto: arm64/sm4-ce - check for the right CPU feature bit

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commit 7fa885e2a22fd0f91a2c23d9275f5021f618ff5a upstream.

ARMv8.2 specifies special instructions for the SM3 cryptographic hash
and the SM4 symmetric cipher. While it is unlikely that a core would
implement one and not the other, we should only use SM4 instructions
if the SM4 CPU feature bit is set, and we currently check the SM3
feature bit instead. So fix that.

Fixes: e99ce921c468 ("crypto: arm64 - add support for SM4...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ard Biesheuvel 2018-08-07 23:18:36 +02:00 committed by Greg Kroah-Hartman
parent dce1a2c6f3
commit 26b165edc3
1 changed files with 1 additions and 1 deletions
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arch/arm64/crypto/sm4-ce-glue.c
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@ -69,5 +69,5 @@ static void __exit sm4_ce_mod_fini(void)
crypto_unregister_alg(&sm4_ce_alg);
}
module_cpu_feature_match(SM3, sm4_ce_mod_init);
module_cpu_feature_match(SM4, sm4_ce_mod_init);
module_exit(sm4_ce_mod_fini);