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authorHuang Ying <ying.huang@intel.com>2009-01-09 16:49:30 +1100
committerHerbert Xu <herbert@gondor.apana.org.au>2009-02-18 16:48:04 +0800
commit109568e110ed67d4be1b28609b9fa00fca97f8eb (patch)
treef40a1c6a35bb45abf7edcf8ab55ed75af6d405fb
parent8eb2dfac41c71701bb741f496f0cb7b7e4a3c3f6 (diff)
downloadlinux-linaro-109568e110ed67d4be1b28609b9fa00fca97f8eb.tar.gz
crypto: aes - Move key_length in struct crypto_aes_ctx to be the last field
The Intel AES-NI AES acceleration instructions need key_enc, key_dec in struct crypto_aes_ctx to be 16 byte aligned, it make this easier to move key_length to be the last one. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--arch/x86/crypto/aes-i586-asm_32.S6
-rw-r--r--arch/x86/crypto/aes-x86_64-asm_64.S4
-rw-r--r--include/crypto/aes.h6
3 files changed, 10 insertions, 6 deletions
diff --git a/arch/x86/crypto/aes-i586-asm_32.S b/arch/x86/crypto/aes-i586-asm_32.S
index e41b147f450..5252c388017 100644
--- a/arch/x86/crypto/aes-i586-asm_32.S
+++ b/arch/x86/crypto/aes-i586-asm_32.S
@@ -46,9 +46,9 @@
#define in_blk 16
/* offsets in crypto_tfm structure */
-#define klen (crypto_tfm_ctx_offset + 0)
-#define ekey (crypto_tfm_ctx_offset + 4)
-#define dkey (crypto_tfm_ctx_offset + 244)
+#define klen (crypto_tfm_ctx_offset + 480)
+#define ekey (crypto_tfm_ctx_offset + 0)
+#define dkey (crypto_tfm_ctx_offset + 240)
// register mapping for encrypt and decrypt subroutines
diff --git a/arch/x86/crypto/aes-x86_64-asm_64.S b/arch/x86/crypto/aes-x86_64-asm_64.S
index a120f526c3d..7f28f62737d 100644
--- a/arch/x86/crypto/aes-x86_64-asm_64.S
+++ b/arch/x86/crypto/aes-x86_64-asm_64.S
@@ -56,13 +56,13 @@
.align 8; \
FUNC: movq r1,r2; \
movq r3,r4; \
- leaq BASE+KEY+48+4(r8),r9; \
+ leaq BASE+KEY+48(r8),r9; \
movq r10,r11; \
movl (r7),r5 ## E; \
movl 4(r7),r1 ## E; \
movl 8(r7),r6 ## E; \
movl 12(r7),r7 ## E; \
- movl BASE+0(r8),r10 ## E; \
+ movl BASE+480(r8),r10 ## E; \
xorl -48(r9),r5 ## E; \
xorl -44(r9),r1 ## E; \
xorl -40(r9),r6 ## E; \
diff --git a/include/crypto/aes.h b/include/crypto/aes.h
index 656a4c66a56..7524ba3b6f3 100644
--- a/include/crypto/aes.h
+++ b/include/crypto/aes.h
@@ -17,10 +17,14 @@
#define AES_MAX_KEYLENGTH (15 * 16)
#define AES_MAX_KEYLENGTH_U32 (AES_MAX_KEYLENGTH / sizeof(u32))
+/*
+ * Please ensure that the first two fields are 16-byte aligned
+ * relative to the start of the structure, i.e., don't move them!
+ */
struct crypto_aes_ctx {
- u32 key_length;
u32 key_enc[AES_MAX_KEYLENGTH_U32];
u32 key_dec[AES_MAX_KEYLENGTH_U32];
+ u32 key_length;
};
extern const u32 crypto_ft_tab[4][256];