On Mon, Sep 25, 2023 at 08:17:50AM -0700, Chang S. Bae wrote: > The address alignment code has been duplicated for each mode. Instead > of duplicating the same code, refactor the alignment code and simplify > the alignment helpers. > > Suggested-by: Eric Biggers <ebiggers@xxxxxxxxxx> > Signed-off-by: Chang S. Bae <chang.seok.bae@xxxxxxxxx> > Cc: linux-crypto@xxxxxxxxxxxxxxx > Cc: x86@xxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx > Link: https://lore.kernel.org/all/20230526065414.GB875@sol.localdomain/ > --- > arch/x86/crypto/aesni-intel_glue.c | 26 ++++++++++---------------- > 1 file changed, 10 insertions(+), 16 deletions(-) > > diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c > index 39d6a62ac627..241d38ae1ed9 100644 > --- a/arch/x86/crypto/aesni-intel_glue.c > +++ b/arch/x86/crypto/aesni-intel_glue.c > @@ -80,6 +80,13 @@ struct gcm_context_data { > u8 hash_keys[GCM_BLOCK_LEN * 16]; > }; > > +static inline void *aes_align_addr(void *addr) > +{ > + if (crypto_tfm_ctx_alignment() >= AESNI_ALIGN) > + return addr; > + return PTR_ALIGN(addr, AESNI_ALIGN); > +} > + > asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key, > unsigned int key_len); > asmlinkage void aesni_enc(const void *ctx, u8 *out, const u8 *in); > @@ -201,32 +208,19 @@ static __ro_after_init DEFINE_STATIC_KEY_FALSE(gcm_use_avx2); > static inline struct > aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm) > { > - unsigned long align = AESNI_ALIGN; > - > - if (align <= crypto_tfm_ctx_alignment()) > - align = 1; > - return PTR_ALIGN(crypto_aead_ctx(tfm), align); > + return (struct aesni_rfc4106_gcm_ctx *)aes_align_addr(crypto_aead_ctx(tfm)); > } > > static inline struct > generic_gcmaes_ctx *generic_gcmaes_ctx_get(struct crypto_aead *tfm) > { > - unsigned long align = AESNI_ALIGN; > - > - if (align <= crypto_tfm_ctx_alignment()) > - align = 1; > - return PTR_ALIGN(crypto_aead_ctx(tfm), align); > + return (struct generic_gcmaes_ctx *)aes_align_addr(crypto_aead_ctx(tfm)); > } > #endif > > static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx) > { > - unsigned long addr = (unsigned long)raw_ctx; > - unsigned long align = AESNI_ALIGN; > - > - if (align <= crypto_tfm_ctx_alignment()) > - align = 1; > - return (struct crypto_aes_ctx *)ALIGN(addr, align); > + return (struct crypto_aes_ctx *)aes_align_addr(raw_ctx); > } The casts can be dropped, since aes_align_addr() returns 'void *'. - Eric
