The AES-NI instructions are also available in legacy mode so the 32-bit
architecture may profit from those, too.
To illustrate the performance gain here's a short summary of a dm-crypt
speed test on a Core i7 M620 running at 2.67GHz comparing both assembler
implementations:
x86: i568 aes-ni delta
ECB, 256 bit: 93.8 MB/s 123.3 MB/s +31.4%
CBC, 256 bit: 84.8 MB/s 262.3 MB/s +209.3%
LRW, 256 bit: 108.6 MB/s 222.1 MB/s +104.5%
XTS, 256 bit: 105.0 MB/s 205.5 MB/s +95.7%
Additionally, due to some minor optimizations, the 64-bit version also
got a minor performance gain as seen below:
x86-64: old impl. new impl. delta
ECB, 256 bit: 121.1 MB/s 123.0 MB/s +1.5%
CBC, 256 bit: 285.3 MB/s 290.8 MB/s +1.9%
LRW, 256 bit: 263.7 MB/s 265.3 MB/s +0.6%
XTS, 256 bit: 251.1 MB/s 255.3 MB/s +1.7%
Signed-off-by: Mathias Krause <minipli@xxxxxxxxxxxxxx>
---
v4 changes:
* adapted CBC implementation to be useable on x86, too
* redo the measurement using dm-crypt
v3 changes:
* fixed 32-bit implementation of aesni_ecb_enc (a hunk somehow moved to the end
of another function)
v2 changes:
* hide almost all register names in macros so the same code base can be shared
between x86 and x86_64
* unified Kconfig documentation again
* added alignment constraints for internal functions.
arch/x86/crypto/aesni-intel_asm.S | 197 ++++++++++++++++++++++++++++++------
arch/x86/crypto/aesni-intel_glue.c | 22 +++-
crypto/Kconfig | 12 ++-
3 files changed, 191 insertions(+), 40 deletions(-)
diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S
index ff16756..74626fa 100644
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -9,6 +9,9 @@
* Vinodh Gopal <vinodh.gopal@xxxxxxxxx>
* Kahraman Akdemir
*
+ * Ported x86_64 version to x86:
+ * Author: Mathias Krause <minipli@xxxxxxxxxxxxxx>
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
@@ -32,12 +35,16 @@
#define IN IN1
#define KEY %xmm2
#define IV %xmm3
+
#define BSWAP_MASK %xmm10
#define CTR %xmm11
#define INC %xmm12
+#ifdef __x86_64__
+#define AREG %rax
#define KEYP %rdi
#define OUTP %rsi
+#define UKEYP OUTP
#define INP %rdx
#define LEN %rcx
#define IVP %r8
@@ -46,6 +53,18 @@
#define TKEYP T1
#define T2 %r11
#define TCTR_LOW T2
+#else
+#define AREG %eax
+#define KEYP %edi
+#define OUTP AREG
+#define UKEYP OUTP
+#define INP %edx
+#define LEN %esi
+#define IVP %ebp
+#define KLEN %ebx
+#define T1 %ecx
+#define TKEYP T1
+#endif
_key_expansion_128:
_key_expansion_256a:
@@ -55,10 +74,11 @@ _key_expansion_256a:
shufps $0b10001100, %xmm0, %xmm4
pxor %xmm4, %xmm0
pxor %xmm1, %xmm0
- movaps %xmm0, (%rcx)
- add $0x10, %rcx
+ movaps %xmm0, (TKEYP)
+ add $0x10, TKEYP
ret
+.align 4
_key_expansion_192a:
pshufd $0b01010101, %xmm1, %xmm1
shufps $0b00010000, %xmm0, %xmm4
@@ -76,12 +96,13 @@ _key_expansion_192a:
movaps %xmm0, %xmm1
shufps $0b01000100, %xmm0, %xmm6
- movaps %xmm6, (%rcx)
+ movaps %xmm6, (TKEYP)
shufps $0b01001110, %xmm2, %xmm1
- movaps %xmm1, 16(%rcx)
- add $0x20, %rcx
+ movaps %xmm1, 0x10(TKEYP)
+ add $0x20, TKEYP
ret
+.align 4
_key_expansion_192b:
pshufd $0b01010101, %xmm1, %xmm1
shufps $0b00010000, %xmm0, %xmm4
@@ -96,10 +117,11 @@ _key_expansion_192b:
pxor %xmm3, %xmm2
pxor %xmm5, %xmm2
- movaps %xmm0, (%rcx)
- add $0x10, %rcx
+ movaps %xmm0, (TKEYP)
+ add $0x10, TKEYP
ret
+.align 4
_key_expansion_256b:
pshufd $0b10101010, %xmm1, %xmm1
shufps $0b00010000, %xmm2, %xmm4
@@ -107,8 +129,8 @@ _key_expansion_256b:
shufps $0b10001100, %xmm2, %xmm4
pxor %xmm4, %xmm2
pxor %xmm1, %xmm2
- movaps %xmm2, (%rcx)
- add $0x10, %rcx
+ movaps %xmm2, (TKEYP)
+ add $0x10, TKEYP
ret
/*
@@ -116,17 +138,23 @@ _key_expansion_256b:
* unsigned int key_len)
*/
ENTRY(aesni_set_key)
- movups (%rsi), %xmm0 # user key (first 16 bytes)
- movaps %xmm0, (%rdi)
- lea 0x10(%rdi), %rcx # key addr
- movl %edx, 480(%rdi)
+#ifndef __x86_64__
+ pushl KEYP
+ movl 8(%esp), KEYP # ctx
+ movl 12(%esp), UKEYP # in_key
+ movl 16(%esp), %edx # key_len
+#endif
+ movups (UKEYP), %xmm0 # user key (first 16 bytes)
+ movaps %xmm0, (KEYP)
+ lea 0x10(KEYP), TKEYP # key addr
+ movl %edx, 480(KEYP)
pxor %xmm4, %xmm4 # xmm4 is assumed 0 in _key_expansion_x
cmp $24, %dl
jb .Lenc_key128
je .Lenc_key192
- movups 0x10(%rsi), %xmm2 # other user key
- movaps %xmm2, (%rcx)
- add $0x10, %rcx
+ movups 0x10(UKEYP), %xmm2 # other user key
+ movaps %xmm2, (TKEYP)
+ add $0x10, TKEYP
AESKEYGENASSIST 0x1 %xmm2 %xmm1 # round 1
call _key_expansion_256a
AESKEYGENASSIST 0x1 %xmm0 %xmm1
@@ -155,7 +183,7 @@ ENTRY(aesni_set_key)
call _key_expansion_256a
jmp .Ldec_key
.Lenc_key192:
- movq 0x10(%rsi), %xmm2 # other user key
+ movq 0x10(UKEYP), %xmm2 # other user key
AESKEYGENASSIST 0x1 %xmm2 %xmm1 # round 1
call _key_expansion_192a
AESKEYGENASSIST 0x2 %xmm2 %xmm1 # round 2
@@ -195,33 +223,47 @@ ENTRY(aesni_set_key)
AESKEYGENASSIST 0x36 %xmm0 %xmm1 # round 10
call _key_expansion_128
.Ldec_key:
- sub $0x10, %rcx
- movaps (%rdi), %xmm0
- movaps (%rcx), %xmm1
- movaps %xmm0, 240(%rcx)
- movaps %xmm1, 240(%rdi)
- add $0x10, %rdi
- lea 240-16(%rcx), %rsi
+ sub $0x10, TKEYP
+ movaps (KEYP), %xmm0
+ movaps (TKEYP), %xmm1
+ movaps %xmm0, 240(TKEYP)
+ movaps %xmm1, 240(KEYP)
+ add $0x10, KEYP
+ lea 240-16(TKEYP), UKEYP
.align 4
.Ldec_key_loop:
- movaps (%rdi), %xmm0
+ movaps (KEYP), %xmm0
AESIMC %xmm0 %xmm1
- movaps %xmm1, (%rsi)
- add $0x10, %rdi
- sub $0x10, %rsi
- cmp %rcx, %rdi
+ movaps %xmm1, (UKEYP)
+ add $0x10, KEYP
+ sub $0x10, UKEYP
+ cmp TKEYP, KEYP
jb .Ldec_key_loop
- xor %rax, %rax
+ xor AREG, AREG
+#ifndef __x86_64__
+ popl KEYP
+#endif
ret
/*
* void aesni_enc(struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
*/
ENTRY(aesni_enc)
+#ifndef __x86_64__
+ pushl KEYP
+ pushl KLEN
+ movl 12(%esp), KEYP
+ movl 16(%esp), OUTP
+ movl 20(%esp), INP
+#endif
movl 480(KEYP), KLEN # key length
movups (INP), STATE # input
call _aesni_enc1
movups STATE, (OUTP) # output
+#ifndef __x86_64__
+ popl KLEN
+ popl KEYP
+#endif
ret
/*
@@ -236,6 +278,7 @@ ENTRY(aesni_enc)
* KEY
* TKEYP (T1)
*/
+.align 4
_aesni_enc1:
movaps (KEYP), KEY # key
mov KEYP, TKEYP
@@ -298,6 +341,7 @@ _aesni_enc1:
* KEY
* TKEYP (T1)
*/
+.align 4
_aesni_enc4:
movaps (KEYP), KEY # key
mov KEYP, TKEYP
@@ -391,11 +435,22 @@ _aesni_enc4:
* void aesni_dec (struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
*/
ENTRY(aesni_dec)
+#ifndef __x86_64__
+ pushl KEYP
+ pushl KLEN
+ movl 12(%esp), KEYP
+ movl 16(%esp), OUTP
+ movl 20(%esp), INP
+#endif
mov 480(KEYP), KLEN # key length
add $240, KEYP
movups (INP), STATE # input
call _aesni_dec1
movups STATE, (OUTP) #output
+#ifndef __x86_64__
+ popl KLEN
+ popl KEYP
+#endif
ret
/*
@@ -410,6 +465,7 @@ ENTRY(aesni_dec)
* KEY
* TKEYP (T1)
*/
+.align 4
_aesni_dec1:
movaps (KEYP), KEY # key
mov KEYP, TKEYP
@@ -472,6 +528,7 @@ _aesni_dec1:
* KEY
* TKEYP (T1)
*/
+.align 4
_aesni_dec4:
movaps (KEYP), KEY # key
mov KEYP, TKEYP
@@ -566,6 +623,15 @@ _aesni_dec4:
* size_t len)
*/
ENTRY(aesni_ecb_enc)
+#ifndef __x86_64__
+ pushl LEN
+ pushl KEYP
+ pushl KLEN
+ movl 16(%esp), KEYP
+ movl 20(%esp), OUTP
+ movl 24(%esp), INP
+ movl 28(%esp), LEN
+#endif
test LEN, LEN # check length
jz .Lecb_enc_ret
mov 480(KEYP), KLEN
@@ -602,6 +668,11 @@ ENTRY(aesni_ecb_enc)
cmp $16, LEN
jge .Lecb_enc_loop1
.Lecb_enc_ret:
+#ifndef __x86_64__
+ popl KLEN
+ popl KEYP
+ popl LEN
+#endif
ret
/*
@@ -609,6 +680,15 @@ ENTRY(aesni_ecb_enc)
* size_t len);
*/
ENTRY(aesni_ecb_dec)
+#ifndef __x86_64__
+ pushl LEN
+ pushl KEYP
+ pushl KLEN
+ movl 16(%esp), KEYP
+ movl 20(%esp), OUTP
+ movl 24(%esp), INP
+ movl 28(%esp), LEN
+#endif
test LEN, LEN
jz .Lecb_dec_ret
mov 480(KEYP), KLEN
@@ -646,6 +726,11 @@ ENTRY(aesni_ecb_dec)
cmp $16, LEN
jge .Lecb_dec_loop1
.Lecb_dec_ret:
+#ifndef __x86_64__
+ popl KLEN
+ popl KEYP
+ popl LEN
+#endif
ret
/*
@@ -653,6 +738,17 @@ ENTRY(aesni_ecb_dec)
* size_t len, u8 *iv)
*/
ENTRY(aesni_cbc_enc)
+#ifndef __x86_64__
+ pushl IVP
+ pushl LEN
+ pushl KEYP
+ pushl KLEN
+ movl 20(%esp), KEYP
+ movl 24(%esp), OUTP
+ movl 28(%esp), INP
+ movl 32(%esp), LEN
+ movl 36(%esp), IVP
+#endif
cmp $16, LEN
jb .Lcbc_enc_ret
mov 480(KEYP), KLEN
@@ -670,6 +766,12 @@ ENTRY(aesni_cbc_enc)
jge .Lcbc_enc_loop
movups STATE, (IVP)
.Lcbc_enc_ret:
+#ifndef __x86_64__
+ popl KLEN
+ popl KEYP
+ popl LEN
+ popl IVP
+#endif
ret
/*
@@ -677,6 +779,17 @@ ENTRY(aesni_cbc_enc)
* size_t len, u8 *iv)
*/
ENTRY(aesni_cbc_dec)
+#ifndef __x86_64__
+ pushl IVP
+ pushl LEN
+ pushl KEYP
+ pushl KLEN
+ movl 20(%esp), KEYP
+ movl 24(%esp), OUTP
+ movl 28(%esp), INP
+ movl 32(%esp), LEN
+ movl 36(%esp), IVP
+#endif
cmp $16, LEN
jb .Lcbc_dec_just_ret
mov 480(KEYP), KLEN
@@ -690,16 +803,30 @@ ENTRY(aesni_cbc_dec)
movaps IN1, STATE1
movups 0x10(INP), IN2
movaps IN2, STATE2
+#ifdef __x86_64__
movups 0x20(INP), IN3
movaps IN3, STATE3
movups 0x30(INP), IN4
movaps IN4, STATE4
+#else
+ movups 0x20(INP), IN1
+ movaps IN1, STATE3
+ movups 0x30(INP), IN2
+ movaps IN2, STATE4
+#endif
call _aesni_dec4
pxor IV, STATE1
+#ifdef __x86_64__
pxor IN1, STATE2
pxor IN2, STATE3
pxor IN3, STATE4
movaps IN4, IV
+#else
+ pxor (INP), STATE2
+ pxor 0x10(INP), STATE3
+ pxor IN1, STATE4
+ movaps IN2, IV
+#endif
movups STATE1, (OUTP)
movups STATE2, 0x10(OUTP)
movups STATE3, 0x20(OUTP)
@@ -727,8 +854,15 @@ ENTRY(aesni_cbc_dec)
.Lcbc_dec_ret:
movups IV, (IVP)
.Lcbc_dec_just_ret:
+#ifndef __x86_64__
+ popl KLEN
+ popl KEYP
+ popl LEN
+ popl IVP
+#endif
ret
+#ifdef __x86_64__
.align 16
.Lbswap_mask:
.byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
@@ -744,6 +878,7 @@ ENTRY(aesni_cbc_dec)
* INC: == 1, in little endian
* BSWAP_MASK == endian swapping mask
*/
+.align 4
_aesni_inc_init:
movaps .Lbswap_mask, BSWAP_MASK
movaps IV, CTR
@@ -768,6 +903,7 @@ _aesni_inc_init:
* CTR: == output IV, in little endian
* TCTR_LOW: == lower qword of CTR
*/
+.align 4
_aesni_inc:
paddq INC, CTR
add $1, TCTR_LOW
@@ -839,3 +975,4 @@ ENTRY(aesni_ctr_enc)
movups IV, (IVP)
.Lctr_enc_just_ret:
ret
+#endif
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index 2cb3dcc..0b0f364 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -59,8 +59,10 @@ asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in, unsigned int len, u8 *iv);
asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in, unsigned int len, u8 *iv);
+#ifdef CONFIG_X86_64
asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in, unsigned int len, u8 *iv);
+#endif
static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
{
@@ -324,6 +326,7 @@ static struct crypto_alg blk_cbc_alg = {
},
};
+#ifdef CONFIG_X86_64
static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
struct blkcipher_walk *walk)
{
@@ -389,6 +392,7 @@ static struct crypto_alg blk_ctr_alg = {
},
},
};
+#endif
static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int key_len)
@@ -536,6 +540,7 @@ static struct crypto_alg ablk_cbc_alg = {
},
};
+#ifdef CONFIG_X86_64
static int ablk_ctr_init(struct crypto_tfm *tfm)
{
struct cryptd_ablkcipher *cryptd_tfm;
@@ -612,6 +617,7 @@ static struct crypto_alg ablk_rfc3686_ctr_alg = {
},
};
#endif
+#endif
#ifdef HAS_LRW
static int ablk_lrw_init(struct crypto_tfm *tfm)
@@ -746,18 +752,20 @@ static int __init aesni_init(void)
goto blk_ecb_err;
if ((err = crypto_register_alg(&blk_cbc_alg)))
goto blk_cbc_err;
- if ((err = crypto_register_alg(&blk_ctr_alg)))
- goto blk_ctr_err;
if ((err = crypto_register_alg(&ablk_ecb_alg)))
goto ablk_ecb_err;
if ((err = crypto_register_alg(&ablk_cbc_alg)))
goto ablk_cbc_err;
+#ifdef CONFIG_X86_64
+ if ((err = crypto_register_alg(&blk_ctr_alg)))
+ goto blk_ctr_err;
if ((err = crypto_register_alg(&ablk_ctr_alg)))
goto ablk_ctr_err;
#ifdef HAS_CTR
if ((err = crypto_register_alg(&ablk_rfc3686_ctr_alg)))
goto ablk_rfc3686_ctr_err;
#endif
+#endif
#ifdef HAS_LRW
if ((err = crypto_register_alg(&ablk_lrw_alg)))
goto ablk_lrw_err;
@@ -784,18 +792,20 @@ ablk_pcbc_err:
crypto_unregister_alg(&ablk_lrw_alg);
ablk_lrw_err:
#endif
+#ifdef CONFIG_X86_64
#ifdef HAS_CTR
crypto_unregister_alg(&ablk_rfc3686_ctr_alg);
ablk_rfc3686_ctr_err:
#endif
crypto_unregister_alg(&ablk_ctr_alg);
ablk_ctr_err:
+ crypto_unregister_alg(&blk_ctr_alg);
+blk_ctr_err:
+#endif
crypto_unregister_alg(&ablk_cbc_alg);
ablk_cbc_err:
crypto_unregister_alg(&ablk_ecb_alg);
ablk_ecb_err:
- crypto_unregister_alg(&blk_ctr_alg);
-blk_ctr_err:
crypto_unregister_alg(&blk_cbc_alg);
blk_cbc_err:
crypto_unregister_alg(&blk_ecb_alg);
@@ -818,13 +828,15 @@ static void __exit aesni_exit(void)
#ifdef HAS_LRW
crypto_unregister_alg(&ablk_lrw_alg);
#endif
+#ifdef CONFIG_X86_64
#ifdef HAS_CTR
crypto_unregister_alg(&ablk_rfc3686_ctr_alg);
#endif
crypto_unregister_alg(&ablk_ctr_alg);
+ crypto_unregister_alg(&blk_ctr_alg);
+#endif
crypto_unregister_alg(&ablk_cbc_alg);
crypto_unregister_alg(&ablk_ecb_alg);
- crypto_unregister_alg(&blk_ctr_alg);
crypto_unregister_alg(&blk_cbc_alg);
crypto_unregister_alg(&blk_ecb_alg);
crypto_unregister_alg(&__aesni_alg);
diff --git a/crypto/Kconfig b/crypto/Kconfig
index e4bac29..0e399e4 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -539,8 +539,9 @@ config CRYPTO_AES_X86_64
config CRYPTO_AES_NI_INTEL
tristate "AES cipher algorithms (AES-NI)"
- depends on (X86 || UML_X86) && 64BIT
- select CRYPTO_AES_X86_64
+ depends on (X86 || UML_X86)
+ select CRYPTO_AES_X86_64 if 64BIT
+ select CRYPTO_AES_586 if !64BIT
select CRYPTO_CRYPTD
select CRYPTO_ALGAPI
select CRYPTO_FPU
@@ -563,9 +564,10 @@ config CRYPTO_AES_NI_INTEL
See <http://csrc.nist.gov/encryption/aes/> for more information.
- In addition to AES cipher algorithm support, the
- acceleration for some popular block cipher mode is supported
- too, including ECB, CBC, CTR, LRW, PCBC, XTS.
+ In addition to AES cipher algorithm support, the acceleration
+ for some popular block cipher mode is supported too, including
+ ECB, CBC, LRW, PCBC, XTS. The 64 bit version has additional
+ acceleration for CTR.
config CRYPTO_ANUBIS
tristate "Anubis cipher algorithm"
--
1.5.6.5
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