crypto: x86/aesni - don't require alignment of data

commit d480a26bdf872529919e7c30e17f79d0d7b8c4da upstream.

x86 AES-NI routines can deal with unaligned data. Crypto context
(key, iv etc.) have to be aligned but we take care of that separately
by copying it onto the stack. We were feeding unaligned data into
crypto routines up until commit 83c83e658863 ("crypto: aesni -
refactor scatterlist processing") switched to use the full
skcipher API which uses cra_alignmask to decide data alignment.

This fixes 21% performance regression in kTLS.

Tested by booting with CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y
(and running thru various kTLS packets).

CC: stable@vger.kernel.org # 5.15+
Fixes: 83c83e658863 ("crypto: aesni - refactor scatterlist processing")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index e09f4672dd382f5ac5c6d95a80592653de072072..41901ba9d3a2c46c8335cabe86af521f2cb3179e 100644 (file)
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -1107,7 +1107,7 @@ static struct aead_alg aesni_aeads[] = { {
                .cra_flags              = CRYPTO_ALG_INTERNAL,
                .cra_blocksize          = 1,
                .cra_ctxsize            = sizeof(struct aesni_rfc4106_gcm_ctx),
-               .cra_alignmask          = AESNI_ALIGN - 1,
+               .cra_alignmask          = 0,
                .cra_module             = THIS_MODULE,
        },
 }, {
@@ -1124,7 +1124,7 @@ static struct aead_alg aesni_aeads[] = { {
                .cra_flags              = CRYPTO_ALG_INTERNAL,
                .cra_blocksize          = 1,
                .cra_ctxsize            = sizeof(struct generic_gcmaes_ctx),
-               .cra_alignmask          = AESNI_ALIGN - 1,
+               .cra_alignmask          = 0,
                .cra_module             = THIS_MODULE,
        },
 } };