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 <[email protected]>
Signed-off-by: Chang S. Bae <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: https://lore.kernel.org/all/[email protected]/
---
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);
}
static int aes_set_key_common(struct crypto_aes_ctx *ctx,
--
2.34.1
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 <[email protected]>
> Signed-off-by: Chang S. Bae <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
> Cc: [email protected]
> Link: https://lore.kernel.org/all/[email protected]/
> ---
> 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