[PATCH 03/16] crypto: arm64/sm4 - refactor and simplify NEON implementation
Tianjia Zhang
tianjia.zhang at linux.alibaba.com
Mon Sep 26 02:36:07 PDT 2022
This patch does not add new features. The main work is to refactor and
simplify the implementation of SM4 NEON, which is reflected in the
following aspects:
The accelerated implementation supports the arbitrary number of blocks,
not just multiples of 8, which simplifies the implementation and brings
some optimization acceleration for data that is not aligned by 8 blocks.
When loading the input data, use the ld4 instruction to replace the
original ld1 instruction as much as possible, which will save the cost
of matrix transposition of the input data.
Use 8-block parallelism whenever possible to speed up matrix transpose
and rotation operations, instead of up to 4-block parallelism.
Signed-off-by: Tianjia Zhang <tianjia.zhang at linux.alibaba.com>
---
arch/arm64/crypto/sm4-neon-core.S | 630 +++++++++++++++++++-----------
arch/arm64/crypto/sm4-neon-glue.c | 172 +++-----
2 files changed, 456 insertions(+), 346 deletions(-)
diff --git a/arch/arm64/crypto/sm4-neon-core.S b/arch/arm64/crypto/sm4-neon-core.S
index 3d5256b354d2..f295b4b7d70a 100644
--- a/arch/arm64/crypto/sm4-neon-core.S
+++ b/arch/arm64/crypto/sm4-neon-core.S
@@ -18,6 +18,11 @@
#define RTMP2 v10
#define RTMP3 v11
+#define RTMP4 v12
+#define RTMP5 v13
+#define RTMP6 v14
+#define RTMP7 v15
+
#define RX0 v12
#define RX1 v13
#define RKEY v14
@@ -25,7 +30,7 @@
/* Helper macros. */
-#define PREPARE \
+#define SM4_PREPARE() \
adr_l x5, crypto_sm4_sbox; \
ld1 {v16.16b-v19.16b}, [x5], #64; \
ld1 {v20.16b-v23.16b}, [x5], #64; \
@@ -42,7 +47,25 @@
zip1 s2.2d, RTMP2.2d, RTMP3.2d; \
zip2 s3.2d, RTMP2.2d, RTMP3.2d;
-#define rotate_clockwise_90(s0, s1, s2, s3) \
+#define transpose_4x4_2x(s0, s1, s2, s3, s4, s5, s6, s7) \
+ zip1 RTMP0.4s, s0.4s, s1.4s; \
+ zip1 RTMP1.4s, s2.4s, s3.4s; \
+ zip2 RTMP2.4s, s0.4s, s1.4s; \
+ zip2 RTMP3.4s, s2.4s, s3.4s; \
+ zip1 RTMP4.4s, s4.4s, s5.4s; \
+ zip1 RTMP5.4s, s6.4s, s7.4s; \
+ zip2 RTMP6.4s, s4.4s, s5.4s; \
+ zip2 RTMP7.4s, s6.4s, s7.4s; \
+ zip1 s0.2d, RTMP0.2d, RTMP1.2d; \
+ zip2 s1.2d, RTMP0.2d, RTMP1.2d; \
+ zip1 s2.2d, RTMP2.2d, RTMP3.2d; \
+ zip2 s3.2d, RTMP2.2d, RTMP3.2d; \
+ zip1 s4.2d, RTMP4.2d, RTMP5.2d; \
+ zip2 s5.2d, RTMP4.2d, RTMP5.2d; \
+ zip1 s6.2d, RTMP6.2d, RTMP7.2d; \
+ zip2 s7.2d, RTMP6.2d, RTMP7.2d;
+
+#define rotate_clockwise_4x4(s0, s1, s2, s3) \
zip1 RTMP0.4s, s1.4s, s0.4s; \
zip2 RTMP1.4s, s1.4s, s0.4s; \
zip1 RTMP2.4s, s3.4s, s2.4s; \
@@ -52,6 +75,24 @@
zip1 s2.2d, RTMP3.2d, RTMP1.2d; \
zip2 s3.2d, RTMP3.2d, RTMP1.2d;
+#define rotate_clockwise_4x4_2x(s0, s1, s2, s3, s4, s5, s6, s7) \
+ zip1 RTMP0.4s, s1.4s, s0.4s; \
+ zip1 RTMP2.4s, s3.4s, s2.4s; \
+ zip2 RTMP1.4s, s1.4s, s0.4s; \
+ zip2 RTMP3.4s, s3.4s, s2.4s; \
+ zip1 RTMP4.4s, s5.4s, s4.4s; \
+ zip1 RTMP6.4s, s7.4s, s6.4s; \
+ zip2 RTMP5.4s, s5.4s, s4.4s; \
+ zip2 RTMP7.4s, s7.4s, s6.4s; \
+ zip1 s0.2d, RTMP2.2d, RTMP0.2d; \
+ zip2 s1.2d, RTMP2.2d, RTMP0.2d; \
+ zip1 s2.2d, RTMP3.2d, RTMP1.2d; \
+ zip2 s3.2d, RTMP3.2d, RTMP1.2d; \
+ zip1 s4.2d, RTMP6.2d, RTMP4.2d; \
+ zip2 s5.2d, RTMP6.2d, RTMP4.2d; \
+ zip1 s6.2d, RTMP7.2d, RTMP5.2d; \
+ zip2 s7.2d, RTMP7.2d, RTMP5.2d;
+
#define ROUND4(round, s0, s1, s2, s3) \
dup RX0.4s, RKEY.s[round]; \
/* rk ^ s1 ^ s2 ^ s3 */ \
@@ -87,14 +128,7 @@
/* s0 ^= RTMP3 */ \
eor s0.16b, s0.16b, RTMP3.16b;
-#define SM4_CRYPT_BLK4(b0, b1, b2, b3) \
- rev32 b0.16b, b0.16b; \
- rev32 b1.16b, b1.16b; \
- rev32 b2.16b, b2.16b; \
- rev32 b3.16b, b3.16b; \
- \
- transpose_4x4(b0, b1, b2, b3); \
- \
+#define SM4_CRYPT_BLK4_BE(b0, b1, b2, b3) \
mov x6, 8; \
4: \
ld1 {RKEY.4s}, [x0], #16; \
@@ -107,15 +141,23 @@
\
bne 4b; \
\
- rotate_clockwise_90(b0, b1, b2, b3); \
rev32 b0.16b, b0.16b; \
rev32 b1.16b, b1.16b; \
rev32 b2.16b, b2.16b; \
rev32 b3.16b, b3.16b; \
\
+ rotate_clockwise_4x4(b0, b1, b2, b3); \
+ \
/* repoint to rkey */ \
sub x0, x0, #128;
+#define SM4_CRYPT_BLK4(b0, b1, b2, b3) \
+ rev32 b0.16b, b0.16b; \
+ rev32 b1.16b, b1.16b; \
+ rev32 b2.16b, b2.16b; \
+ rev32 b3.16b, b3.16b; \
+ SM4_CRYPT_BLK4_BE(b0, b1, b2, b3);
+
#define ROUND8(round, s0, s1, s2, s3, t0, t1, t2, t3) \
/* rk ^ s1 ^ s2 ^ s3 */ \
dup RX0.4s, RKEY.s[round]; \
@@ -175,7 +217,7 @@
eor s0.16b, s0.16b, RTMP0.16b; \
eor t0.16b, t0.16b, RTMP1.16b;
-#define SM4_CRYPT_BLK8(b0, b1, b2, b3, b4, b5, b6, b7) \
+#define SM4_CRYPT_BLK8_norotate(b0, b1, b2, b3, b4, b5, b6, b7) \
rev32 b0.16b, b0.16b; \
rev32 b1.16b, b1.16b; \
rev32 b2.16b, b2.16b; \
@@ -185,9 +227,6 @@
rev32 b6.16b, b6.16b; \
rev32 b7.16b, b7.16b; \
\
- transpose_4x4(b0, b1, b2, b3); \
- transpose_4x4(b4, b5, b6, b7); \
- \
mov x6, 8; \
8: \
ld1 {RKEY.4s}, [x0], #16; \
@@ -200,8 +239,6 @@
\
bne 8b; \
\
- rotate_clockwise_90(b0, b1, b2, b3); \
- rotate_clockwise_90(b4, b5, b6, b7); \
rev32 b0.16b, b0.16b; \
rev32 b1.16b, b1.16b; \
rev32 b2.16b, b2.16b; \
@@ -214,274 +251,429 @@
/* repoint to rkey */ \
sub x0, x0, #128;
+#define SM4_CRYPT_BLK8(b0, b1, b2, b3, b4, b5, b6, b7) \
+ SM4_CRYPT_BLK8_norotate(b0, b1, b2, b3, b4, b5, b6, b7); \
+ rotate_clockwise_4x4_2x(b0, b1, b2, b3, b4, b5, b6, b7); \
-.align 3
-SYM_FUNC_START_LOCAL(__sm4_neon_crypt_blk1_4)
- /* input:
- * x0: round key array, CTX
- * x1: dst
- * x2: src
- * w3: num blocks (1..4)
- */
- PREPARE;
-
- ld1 {v0.16b}, [x2], #16;
- mov v1.16b, v0.16b;
- mov v2.16b, v0.16b;
- mov v3.16b, v0.16b;
- cmp w3, #2;
- blt .Lblk4_load_input_done;
- ld1 {v1.16b}, [x2], #16;
- beq .Lblk4_load_input_done;
- ld1 {v2.16b}, [x2], #16;
- cmp w3, #3;
- beq .Lblk4_load_input_done;
- ld1 {v3.16b}, [x2];
-
-.Lblk4_load_input_done:
- SM4_CRYPT_BLK4(v0, v1, v2, v3);
-
- st1 {v0.16b}, [x1], #16;
- cmp w3, #2;
- blt .Lblk4_store_output_done;
- st1 {v1.16b}, [x1], #16;
- beq .Lblk4_store_output_done;
- st1 {v2.16b}, [x1], #16;
- cmp w3, #3;
- beq .Lblk4_store_output_done;
- st1 {v3.16b}, [x1];
-
-.Lblk4_store_output_done:
- ret;
-SYM_FUNC_END(__sm4_neon_crypt_blk1_4)
.align 3
-SYM_FUNC_START(sm4_neon_crypt_blk1_8)
+SYM_FUNC_START(sm4_neon_crypt)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
- * w3: num blocks (1..8)
+ * w3: nblocks
*/
- cmp w3, #5;
- blt __sm4_neon_crypt_blk1_4;
-
- PREPARE;
-
- ld1 {v0.16b-v3.16b}, [x2], #64;
- ld1 {v4.16b}, [x2], #16;
- mov v5.16b, v4.16b;
- mov v6.16b, v4.16b;
- mov v7.16b, v4.16b;
- beq .Lblk8_load_input_done;
- ld1 {v5.16b}, [x2], #16;
- cmp w3, #7;
- blt .Lblk8_load_input_done;
- ld1 {v6.16b}, [x2], #16;
- beq .Lblk8_load_input_done;
- ld1 {v7.16b}, [x2];
-
-.Lblk8_load_input_done:
- SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7);
-
- cmp w3, #6;
- st1 {v0.16b-v3.16b}, [x1], #64;
- st1 {v4.16b}, [x1], #16;
- blt .Lblk8_store_output_done;
- st1 {v5.16b}, [x1], #16;
- beq .Lblk8_store_output_done;
- st1 {v6.16b}, [x1], #16;
- cmp w3, #7;
- beq .Lblk8_store_output_done;
- st1 {v7.16b}, [x1];
-
-.Lblk8_store_output_done:
- ret;
-SYM_FUNC_END(sm4_neon_crypt_blk1_8)
+ SM4_PREPARE()
-.align 3
-SYM_FUNC_START(sm4_neon_crypt_blk8)
- /* input:
- * x0: round key array, CTX
- * x1: dst
- * x2: src
- * w3: nblocks (multiples of 8)
- */
- PREPARE;
+.Lcrypt_loop_8x:
+ sub w3, w3, #8
+ tbnz w3, #31, .Lcrypt_4x
+
+ ld4 {v0.4s-v3.4s}, [x2], #64
+ ld4 {v4.4s-v7.4s}, [x2], #64
-.Lcrypt_loop_blk:
- subs w3, w3, #8;
- bmi .Lcrypt_end;
+ SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7)
- ld1 {v0.16b-v3.16b}, [x2], #64;
- ld1 {v4.16b-v7.16b}, [x2], #64;
+ st1 {v0.16b-v3.16b}, [x1], #64
+ st1 {v4.16b-v7.16b}, [x1], #64
- SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7);
+ cbz w3, .Lcrypt_end
+ b .Lcrypt_loop_8x
- st1 {v0.16b-v3.16b}, [x1], #64;
- st1 {v4.16b-v7.16b}, [x1], #64;
+.Lcrypt_4x:
+ add w3, w3, #8
+ cmp w3, #4
+ blt .Lcrypt_tail
- b .Lcrypt_loop_blk;
+ sub w3, w3, #4
+
+ ld4 {v0.4s-v3.4s}, [x2], #64
+
+ SM4_CRYPT_BLK4(v0, v1, v2, v3)
+
+ st1 {v0.16b-v3.16b}, [x1], #64
+
+ cbz w3, .Lcrypt_end
+
+.Lcrypt_tail:
+ cmp w3, #2
+ ld1 {v0.16b}, [x2], #16
+ blt .Lcrypt_tail_load_done
+ ld1 {v1.16b}, [x2], #16
+ beq .Lcrypt_tail_load_done
+ ld1 {v2.16b}, [x2], #16
+
+.Lcrypt_tail_load_done:
+ transpose_4x4(v0, v1, v2, v3)
+
+ SM4_CRYPT_BLK4(v0, v1, v2, v3)
+
+ cmp w3, #2
+ st1 {v0.16b}, [x1], #16
+ blt .Lcrypt_end
+ st1 {v1.16b}, [x1], #16
+ beq .Lcrypt_end
+ st1 {v2.16b}, [x1], #16
.Lcrypt_end:
- ret;
-SYM_FUNC_END(sm4_neon_crypt_blk8)
+ ret
+SYM_FUNC_END(sm4_neon_crypt)
.align 3
-SYM_FUNC_START(sm4_neon_cbc_dec_blk8)
+SYM_FUNC_START(sm4_neon_cbc_dec)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: iv (big endian, 128 bit)
- * w4: nblocks (multiples of 8)
+ * w4: nblocks
*/
- PREPARE;
+ SM4_PREPARE()
+
+ ld1 {RIV.16b}, [x3]
+
+.Lcbc_dec_loop_8x:
+ sub w4, w4, #8
+ tbnz w4, #31, .Lcbc_dec_4x
+
+ ld4 {v0.4s-v3.4s}, [x2], #64
+ ld4 {v4.4s-v7.4s}, [x2]
+
+ SM4_CRYPT_BLK8_norotate(v0, v1, v2, v3, v4, v5, v6, v7)
+
+ /* Avoid overwriting the RIV register */
+ rotate_clockwise_4x4(v0, v1, v2, v3)
+ rotate_clockwise_4x4(v4, v5, v6, v7)
+
+ sub x2, x2, #64
+
+ eor v0.16b, v0.16b, RIV.16b
- ld1 {RIV.16b}, [x3];
+ ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64
+ ld1 {RTMP4.16b-RTMP7.16b}, [x2], #64
-.Lcbc_loop_blk:
- subs w4, w4, #8;
- bmi .Lcbc_end;
+ eor v1.16b, v1.16b, RTMP0.16b
+ eor v2.16b, v2.16b, RTMP1.16b
+ eor v3.16b, v3.16b, RTMP2.16b
+ eor v4.16b, v4.16b, RTMP3.16b
+ eor v5.16b, v5.16b, RTMP4.16b
+ eor v6.16b, v6.16b, RTMP5.16b
+ eor v7.16b, v7.16b, RTMP6.16b
- ld1 {v0.16b-v3.16b}, [x2], #64;
- ld1 {v4.16b-v7.16b}, [x2];
+ mov RIV.16b, RTMP7.16b
- SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7);
+ st1 {v0.16b-v3.16b}, [x1], #64
+ st1 {v4.16b-v7.16b}, [x1], #64
- sub x2, x2, #64;
- eor v0.16b, v0.16b, RIV.16b;
- ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
- eor v1.16b, v1.16b, RTMP0.16b;
- eor v2.16b, v2.16b, RTMP1.16b;
- eor v3.16b, v3.16b, RTMP2.16b;
- st1 {v0.16b-v3.16b}, [x1], #64;
+ cbz w4, .Lcbc_dec_end
+ b .Lcbc_dec_loop_8x
- eor v4.16b, v4.16b, RTMP3.16b;
- ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
- eor v5.16b, v5.16b, RTMP0.16b;
- eor v6.16b, v6.16b, RTMP1.16b;
- eor v7.16b, v7.16b, RTMP2.16b;
+.Lcbc_dec_4x:
+ add w4, w4, #8
+ cmp w4, #4
+ blt .Lcbc_dec_tail
- mov RIV.16b, RTMP3.16b;
- st1 {v4.16b-v7.16b}, [x1], #64;
+ sub w4, w4, #4
- b .Lcbc_loop_blk;
+ ld1 {v0.16b-v3.16b}, [x2], #64
-.Lcbc_end:
+ rev32 v4.16b, v0.16b
+ rev32 v5.16b, v1.16b
+ rev32 v6.16b, v2.16b
+ rev32 v7.16b, v3.16b
+
+ transpose_4x4(v4, v5, v6, v7)
+
+ SM4_CRYPT_BLK4_BE(v4, v5, v6, v7)
+
+ eor v4.16b, v4.16b, RIV.16b
+ eor v5.16b, v5.16b, v0.16b
+ eor v6.16b, v6.16b, v1.16b
+ eor v7.16b, v7.16b, v2.16b
+
+ mov RIV.16b, v3.16b
+
+ st1 {v4.16b-v7.16b}, [x1], #64
+
+ cbz w4, .Lcbc_dec_end
+
+.Lcbc_dec_tail:
+ cmp w4, #2
+ ld1 {v0.16b}, [x2], #16
+ blt .Lcbc_dec_tail_load_done
+ ld1 {v1.16b}, [x2], #16
+ beq .Lcbc_dec_tail_load_done
+ ld1 {v2.16b}, [x2], #16
+
+.Lcbc_dec_tail_load_done:
+ rev32 v4.16b, v0.16b
+ rev32 v5.16b, v1.16b
+ rev32 v6.16b, v2.16b
+
+ transpose_4x4(v4, v5, v6, v7)
+
+ SM4_CRYPT_BLK4_BE(v4, v5, v6, v7)
+
+ cmp w4, #2
+ eor v4.16b, v4.16b, RIV.16b
+ mov RIV.16b, v0.16b
+ st1 {v4.16b}, [x1], #16
+ blt .Lcbc_dec_end
+
+ eor v5.16b, v5.16b, v0.16b
+ mov RIV.16b, v1.16b
+ st1 {v5.16b}, [x1], #16
+ beq .Lcbc_dec_end
+
+ eor v6.16b, v6.16b, v1.16b
+ mov RIV.16b, v2.16b
+ st1 {v6.16b}, [x1], #16
+
+.Lcbc_dec_end:
/* store new IV */
- st1 {RIV.16b}, [x3];
+ st1 {RIV.16b}, [x3]
- ret;
-SYM_FUNC_END(sm4_neon_cbc_dec_blk8)
+ ret
+SYM_FUNC_END(sm4_neon_cbc_dec)
.align 3
-SYM_FUNC_START(sm4_neon_cfb_dec_blk8)
+SYM_FUNC_START(sm4_neon_cfb_dec)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: iv (big endian, 128 bit)
- * w4: nblocks (multiples of 8)
+ * w4: nblocks
*/
- PREPARE;
+ SM4_PREPARE()
+
+ ld1 {v0.16b}, [x3]
+
+.Lcfb_dec_loop_8x:
+ sub w4, w4, #8
+ tbnz w4, #31, .Lcfb_dec_4x
+
+ ld1 {v1.16b-v3.16b}, [x2], #48
+ ld4 {v4.4s-v7.4s}, [x2]
+
+ transpose_4x4(v0, v1, v2, v3)
+
+ SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7)
+
+ sub x2, x2, #48
+ ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64
+ ld1 {RTMP4.16b-RTMP7.16b}, [x2], #64
+
+ eor v0.16b, v0.16b, RTMP0.16b
+ eor v1.16b, v1.16b, RTMP1.16b
+ eor v2.16b, v2.16b, RTMP2.16b
+ eor v3.16b, v3.16b, RTMP3.16b
+ eor v4.16b, v4.16b, RTMP4.16b
+ eor v5.16b, v5.16b, RTMP5.16b
+ eor v6.16b, v6.16b, RTMP6.16b
+ eor v7.16b, v7.16b, RTMP7.16b
+
+ st1 {v0.16b-v3.16b}, [x1], #64
+ st1 {v4.16b-v7.16b}, [x1], #64
+
+ mov v0.16b, RTMP7.16b
+
+ cbz w4, .Lcfb_dec_end
+ b .Lcfb_dec_loop_8x
+
+.Lcfb_dec_4x:
+ add w4, w4, #8
+ cmp w4, #4
+ blt .Lcfb_dec_tail
+
+ sub w4, w4, #4
+
+ ld1 {v4.16b-v7.16b}, [x2], #64
+
+ rev32 v0.16b, v0.16b /* v0 is IV register */
+ rev32 v1.16b, v4.16b
+ rev32 v2.16b, v5.16b
+ rev32 v3.16b, v6.16b
+
+ transpose_4x4(v0, v1, v2, v3)
+
+ SM4_CRYPT_BLK4_BE(v0, v1, v2, v3)
- ld1 {v0.16b}, [x3];
+ eor v0.16b, v0.16b, v4.16b
+ eor v1.16b, v1.16b, v5.16b
+ eor v2.16b, v2.16b, v6.16b
+ eor v3.16b, v3.16b, v7.16b
-.Lcfb_loop_blk:
- subs w4, w4, #8;
- bmi .Lcfb_end;
+ st1 {v0.16b-v3.16b}, [x1], #64
- ld1 {v1.16b, v2.16b, v3.16b}, [x2], #48;
- ld1 {v4.16b-v7.16b}, [x2];
+ mov v0.16b, v7.16b
- SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7);
+ cbz w4, .Lcfb_dec_end
- sub x2, x2, #48;
- ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
- eor v0.16b, v0.16b, RTMP0.16b;
- eor v1.16b, v1.16b, RTMP1.16b;
- eor v2.16b, v2.16b, RTMP2.16b;
- eor v3.16b, v3.16b, RTMP3.16b;
- st1 {v0.16b-v3.16b}, [x1], #64;
+.Lcfb_dec_tail:
+ cmp w4, #2
+ ld1 {v4.16b}, [x2], #16
+ blt .Lcfb_dec_tail_load_done
+ ld1 {v5.16b}, [x2], #16
+ beq .Lcfb_dec_tail_load_done
+ ld1 {v6.16b}, [x2], #16
- ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
- eor v4.16b, v4.16b, RTMP0.16b;
- eor v5.16b, v5.16b, RTMP1.16b;
- eor v6.16b, v6.16b, RTMP2.16b;
- eor v7.16b, v7.16b, RTMP3.16b;
- st1 {v4.16b-v7.16b}, [x1], #64;
+.Lcfb_dec_tail_load_done:
+ rev32 v0.16b, v0.16b /* v0 is IV register */
+ rev32 v1.16b, v4.16b
+ rev32 v2.16b, v5.16b
- mov v0.16b, RTMP3.16b;
+ transpose_4x4(v0, v1, v2, v3)
- b .Lcfb_loop_blk;
+ SM4_CRYPT_BLK4_BE(v0, v1, v2, v3)
-.Lcfb_end:
+ cmp w4, #2
+ eor v0.16b, v0.16b, v4.16b
+ st1 {v0.16b}, [x1], #16
+ mov v0.16b, v4.16b
+ blt .Lcfb_dec_end
+
+ eor v1.16b, v1.16b, v5.16b
+ st1 {v1.16b}, [x1], #16
+ mov v0.16b, v5.16b
+ beq .Lcfb_dec_end
+
+ eor v2.16b, v2.16b, v6.16b
+ st1 {v2.16b}, [x1], #16
+ mov v0.16b, v6.16b
+
+.Lcfb_dec_end:
/* store new IV */
- st1 {v0.16b}, [x3];
+ st1 {v0.16b}, [x3]
- ret;
-SYM_FUNC_END(sm4_neon_cfb_dec_blk8)
+ ret
+SYM_FUNC_END(sm4_neon_cfb_dec)
.align 3
-SYM_FUNC_START(sm4_neon_ctr_enc_blk8)
+SYM_FUNC_START(sm4_neon_ctr_crypt)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: ctr (big endian, 128 bit)
- * w4: nblocks (multiples of 8)
+ * w4: nblocks
*/
- PREPARE;
+ SM4_PREPARE()
- ldp x7, x8, [x3];
- rev x7, x7;
- rev x8, x8;
+ ldp x7, x8, [x3]
+ rev x7, x7
+ rev x8, x8
-.Lctr_loop_blk:
- subs w4, w4, #8;
- bmi .Lctr_end;
+.Lctr_crypt_loop_8x:
+ sub w4, w4, #8
+ tbnz w4, #31, .Lctr_crypt_4x
-#define inc_le128(vctr) \
- mov vctr.d[1], x8; \
- mov vctr.d[0], x7; \
- adds x8, x8, #1; \
- adc x7, x7, xzr; \
- rev64 vctr.16b, vctr.16b;
+#define inc_le128(vctr) \
+ mov vctr.d[1], x8; \
+ mov vctr.d[0], x7; \
+ adds x8, x8, #1; \
+ rev64 vctr.16b, vctr.16b; \
+ adc x7, x7, xzr;
/* construct CTRs */
- inc_le128(v0); /* +0 */
- inc_le128(v1); /* +1 */
- inc_le128(v2); /* +2 */
- inc_le128(v3); /* +3 */
- inc_le128(v4); /* +4 */
- inc_le128(v5); /* +5 */
- inc_le128(v6); /* +6 */
- inc_le128(v7); /* +7 */
-
- SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7);
-
- ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
- eor v0.16b, v0.16b, RTMP0.16b;
- eor v1.16b, v1.16b, RTMP1.16b;
- eor v2.16b, v2.16b, RTMP2.16b;
- eor v3.16b, v3.16b, RTMP3.16b;
- st1 {v0.16b-v3.16b}, [x1], #64;
-
- ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
- eor v4.16b, v4.16b, RTMP0.16b;
- eor v5.16b, v5.16b, RTMP1.16b;
- eor v6.16b, v6.16b, RTMP2.16b;
- eor v7.16b, v7.16b, RTMP3.16b;
- st1 {v4.16b-v7.16b}, [x1], #64;
-
- b .Lctr_loop_blk;
-
-.Lctr_end:
+ inc_le128(v0) /* +0 */
+ inc_le128(v1) /* +1 */
+ inc_le128(v2) /* +2 */
+ inc_le128(v3) /* +3 */
+ inc_le128(v4) /* +4 */
+ inc_le128(v5) /* +5 */
+ inc_le128(v6) /* +6 */
+ inc_le128(v7) /* +7 */
+
+ transpose_4x4_2x(v0, v1, v2, v3, v4, v5, v6, v7)
+
+ SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7)
+
+ ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64
+ ld1 {RTMP4.16b-RTMP7.16b}, [x2], #64
+
+ eor v0.16b, v0.16b, RTMP0.16b
+ eor v1.16b, v1.16b, RTMP1.16b
+ eor v2.16b, v2.16b, RTMP2.16b
+ eor v3.16b, v3.16b, RTMP3.16b
+ eor v4.16b, v4.16b, RTMP4.16b
+ eor v5.16b, v5.16b, RTMP5.16b
+ eor v6.16b, v6.16b, RTMP6.16b
+ eor v7.16b, v7.16b, RTMP7.16b
+
+ st1 {v0.16b-v3.16b}, [x1], #64
+ st1 {v4.16b-v7.16b}, [x1], #64
+
+ cbz w4, .Lctr_crypt_end
+ b .Lctr_crypt_loop_8x
+
+.Lctr_crypt_4x:
+ add w4, w4, #8
+ cmp w4, #4
+ blt .Lctr_crypt_tail
+
+ sub w4, w4, #4
+
+ /* construct CTRs */
+ inc_le128(v0) /* +0 */
+ inc_le128(v1) /* +1 */
+ inc_le128(v2) /* +2 */
+ inc_le128(v3) /* +3 */
+
+ ld1 {v4.16b-v7.16b}, [x2], #64
+
+ transpose_4x4(v0, v1, v2, v3)
+
+ SM4_CRYPT_BLK4(v0, v1, v2, v3)
+
+ eor v0.16b, v0.16b, v4.16b
+ eor v1.16b, v1.16b, v5.16b
+ eor v2.16b, v2.16b, v6.16b
+ eor v3.16b, v3.16b, v7.16b
+
+ st1 {v0.16b-v3.16b}, [x1], #64
+
+ cbz w4, .Lctr_crypt_end
+
+.Lctr_crypt_tail:
+ /* inc_le128 will change the sign bit */
+ ld1 {v4.16b}, [x2], #16
+ inc_le128(v0)
+ cmp w4, #2
+ blt .Lctr_crypt_tail_load_done
+
+ ld1 {v5.16b}, [x2], #16
+ inc_le128(v1)
+ cmp w4, #2
+ beq .Lctr_crypt_tail_load_done
+
+ ld1 {v6.16b}, [x2], #16
+ inc_le128(v2)
+
+.Lctr_crypt_tail_load_done:
+ transpose_4x4(v0, v1, v2, v3)
+
+ SM4_CRYPT_BLK4(v0, v1, v2, v3)
+
+ cmp w4, #2
+
+ eor v0.16b, v0.16b, v4.16b
+ st1 {v0.16b}, [x1], #16
+ blt .Lctr_crypt_end
+
+ eor v1.16b, v1.16b, v5.16b
+ st1 {v1.16b}, [x1], #16
+ beq .Lctr_crypt_end
+
+ eor v2.16b, v2.16b, v6.16b
+ st1 {v2.16b}, [x1], #16
+
+.Lctr_crypt_end:
/* store new CTR */
- rev x7, x7;
- rev x8, x8;
- stp x7, x8, [x3];
+ rev x7, x7
+ rev x8, x8
+ stp x7, x8, [x3]
- ret;
-SYM_FUNC_END(sm4_neon_ctr_enc_blk8)
+ ret
+SYM_FUNC_END(sm4_neon_ctr_crypt)
diff --git a/arch/arm64/crypto/sm4-neon-glue.c b/arch/arm64/crypto/sm4-neon-glue.c
index 03a6a6866a31..7b19accf5c03 100644
--- a/arch/arm64/crypto/sm4-neon-glue.c
+++ b/arch/arm64/crypto/sm4-neon-glue.c
@@ -18,19 +18,14 @@
#include <crypto/internal/skcipher.h>
#include <crypto/sm4.h>
-#define BYTES2BLKS(nbytes) ((nbytes) >> 4)
-#define BYTES2BLK8(nbytes) (((nbytes) >> 4) & ~(8 - 1))
-
-asmlinkage void sm4_neon_crypt_blk1_8(const u32 *rkey, u8 *dst, const u8 *src,
- unsigned int nblks);
-asmlinkage void sm4_neon_crypt_blk8(const u32 *rkey, u8 *dst, const u8 *src,
- unsigned int nblks);
-asmlinkage void sm4_neon_cbc_dec_blk8(const u32 *rkey, u8 *dst, const u8 *src,
- u8 *iv, unsigned int nblks);
-asmlinkage void sm4_neon_cfb_dec_blk8(const u32 *rkey, u8 *dst, const u8 *src,
- u8 *iv, unsigned int nblks);
-asmlinkage void sm4_neon_ctr_enc_blk8(const u32 *rkey, u8 *dst, const u8 *src,
- u8 *iv, unsigned int nblks);
+asmlinkage void sm4_neon_crypt(const u32 *rkey, u8 *dst, const u8 *src,
+ unsigned int nblocks);
+asmlinkage void sm4_neon_cbc_dec(const u32 *rkey_dec, u8 *dst, const u8 *src,
+ u8 *iv, unsigned int nblocks);
+asmlinkage void sm4_neon_cfb_dec(const u32 *rkey_enc, u8 *dst, const u8 *src,
+ u8 *iv, unsigned int nblocks);
+asmlinkage void sm4_neon_ctr_crypt(const u32 *rkey_enc, u8 *dst, const u8 *src,
+ u8 *iv, unsigned int nblocks);
static int sm4_setkey(struct crypto_skcipher *tfm, const u8 *key,
unsigned int key_len)
@@ -51,27 +46,18 @@ static int sm4_ecb_do_crypt(struct skcipher_request *req, const u32 *rkey)
while ((nbytes = walk.nbytes) > 0) {
const u8 *src = walk.src.virt.addr;
u8 *dst = walk.dst.virt.addr;
- unsigned int nblks;
+ unsigned int nblocks;
- kernel_neon_begin();
+ nblocks = nbytes / SM4_BLOCK_SIZE;
+ if (nblocks) {
+ kernel_neon_begin();
- nblks = BYTES2BLK8(nbytes);
- if (nblks) {
- sm4_neon_crypt_blk8(rkey, dst, src, nblks);
- dst += nblks * SM4_BLOCK_SIZE;
- src += nblks * SM4_BLOCK_SIZE;
- nbytes -= nblks * SM4_BLOCK_SIZE;
- }
+ sm4_neon_crypt(rkey, dst, src, nblocks);
- nblks = BYTES2BLKS(nbytes);
- if (nblks) {
- sm4_neon_crypt_blk1_8(rkey, dst, src, nblks);
- nbytes -= nblks * SM4_BLOCK_SIZE;
+ kernel_neon_end();
}
- kernel_neon_end();
-
- err = skcipher_walk_done(&walk, nbytes);
+ err = skcipher_walk_done(&walk, nbytes % SM4_BLOCK_SIZE);
}
return err;
@@ -138,48 +124,19 @@ static int sm4_cbc_decrypt(struct skcipher_request *req)
while ((nbytes = walk.nbytes) > 0) {
const u8 *src = walk.src.virt.addr;
u8 *dst = walk.dst.virt.addr;
- unsigned int nblks;
+ unsigned int nblocks;
- kernel_neon_begin();
+ nblocks = nbytes / SM4_BLOCK_SIZE;
+ if (nblocks) {
+ kernel_neon_begin();
- nblks = BYTES2BLK8(nbytes);
- if (nblks) {
- sm4_neon_cbc_dec_blk8(ctx->rkey_dec, dst, src,
- walk.iv, nblks);
- dst += nblks * SM4_BLOCK_SIZE;
- src += nblks * SM4_BLOCK_SIZE;
- nbytes -= nblks * SM4_BLOCK_SIZE;
- }
+ sm4_neon_cbc_dec(ctx->rkey_dec, dst, src,
+ walk.iv, nblocks);
- nblks = BYTES2BLKS(nbytes);
- if (nblks) {
- u8 keystream[SM4_BLOCK_SIZE * 8];
- u8 iv[SM4_BLOCK_SIZE];
- int i;
-
- sm4_neon_crypt_blk1_8(ctx->rkey_dec, keystream,
- src, nblks);
-
- src += ((int)nblks - 2) * SM4_BLOCK_SIZE;
- dst += (nblks - 1) * SM4_BLOCK_SIZE;
- memcpy(iv, src + SM4_BLOCK_SIZE, SM4_BLOCK_SIZE);
-
- for (i = nblks - 1; i > 0; i--) {
- crypto_xor_cpy(dst, src,
- &keystream[i * SM4_BLOCK_SIZE],
- SM4_BLOCK_SIZE);
- src -= SM4_BLOCK_SIZE;
- dst -= SM4_BLOCK_SIZE;
- }
- crypto_xor_cpy(dst, walk.iv,
- keystream, SM4_BLOCK_SIZE);
- memcpy(walk.iv, iv, SM4_BLOCK_SIZE);
- nbytes -= nblks * SM4_BLOCK_SIZE;
+ kernel_neon_end();
}
- kernel_neon_end();
-
- err = skcipher_walk_done(&walk, nbytes);
+ err = skcipher_walk_done(&walk, nbytes % SM4_BLOCK_SIZE);
}
return err;
@@ -238,41 +195,21 @@ static int sm4_cfb_decrypt(struct skcipher_request *req)
while ((nbytes = walk.nbytes) > 0) {
const u8 *src = walk.src.virt.addr;
u8 *dst = walk.dst.virt.addr;
- unsigned int nblks;
+ unsigned int nblocks;
- kernel_neon_begin();
+ nblocks = nbytes / SM4_BLOCK_SIZE;
+ if (nblocks) {
+ kernel_neon_begin();
- nblks = BYTES2BLK8(nbytes);
- if (nblks) {
- sm4_neon_cfb_dec_blk8(ctx->rkey_enc, dst, src,
- walk.iv, nblks);
- dst += nblks * SM4_BLOCK_SIZE;
- src += nblks * SM4_BLOCK_SIZE;
- nbytes -= nblks * SM4_BLOCK_SIZE;
- }
+ sm4_neon_cfb_dec(ctx->rkey_enc, dst, src,
+ walk.iv, nblocks);
- nblks = BYTES2BLKS(nbytes);
- if (nblks) {
- u8 keystream[SM4_BLOCK_SIZE * 8];
-
- memcpy(keystream, walk.iv, SM4_BLOCK_SIZE);
- if (nblks > 1)
- memcpy(&keystream[SM4_BLOCK_SIZE], src,
- (nblks - 1) * SM4_BLOCK_SIZE);
- memcpy(walk.iv, src + (nblks - 1) * SM4_BLOCK_SIZE,
- SM4_BLOCK_SIZE);
-
- sm4_neon_crypt_blk1_8(ctx->rkey_enc, keystream,
- keystream, nblks);
-
- crypto_xor_cpy(dst, src, keystream,
- nblks * SM4_BLOCK_SIZE);
- dst += nblks * SM4_BLOCK_SIZE;
- src += nblks * SM4_BLOCK_SIZE;
- nbytes -= nblks * SM4_BLOCK_SIZE;
- }
+ kernel_neon_end();
- kernel_neon_end();
+ dst += nblocks * SM4_BLOCK_SIZE;
+ src += nblocks * SM4_BLOCK_SIZE;
+ nbytes -= nblocks * SM4_BLOCK_SIZE;
+ }
/* tail */
if (walk.nbytes == walk.total && nbytes > 0) {
@@ -302,40 +239,21 @@ static int sm4_ctr_crypt(struct skcipher_request *req)
while ((nbytes = walk.nbytes) > 0) {
const u8 *src = walk.src.virt.addr;
u8 *dst = walk.dst.virt.addr;
- unsigned int nblks;
+ unsigned int nblocks;
- kernel_neon_begin();
+ nblocks = nbytes / SM4_BLOCK_SIZE;
+ if (nblocks) {
+ kernel_neon_begin();
- nblks = BYTES2BLK8(nbytes);
- if (nblks) {
- sm4_neon_ctr_enc_blk8(ctx->rkey_enc, dst, src,
- walk.iv, nblks);
- dst += nblks * SM4_BLOCK_SIZE;
- src += nblks * SM4_BLOCK_SIZE;
- nbytes -= nblks * SM4_BLOCK_SIZE;
- }
+ sm4_neon_ctr_crypt(ctx->rkey_enc, dst, src,
+ walk.iv, nblocks);
- nblks = BYTES2BLKS(nbytes);
- if (nblks) {
- u8 keystream[SM4_BLOCK_SIZE * 8];
- int i;
-
- for (i = 0; i < nblks; i++) {
- memcpy(&keystream[i * SM4_BLOCK_SIZE],
- walk.iv, SM4_BLOCK_SIZE);
- crypto_inc(walk.iv, SM4_BLOCK_SIZE);
- }
- sm4_neon_crypt_blk1_8(ctx->rkey_enc, keystream,
- keystream, nblks);
-
- crypto_xor_cpy(dst, src, keystream,
- nblks * SM4_BLOCK_SIZE);
- dst += nblks * SM4_BLOCK_SIZE;
- src += nblks * SM4_BLOCK_SIZE;
- nbytes -= nblks * SM4_BLOCK_SIZE;
- }
+ kernel_neon_end();
- kernel_neon_end();
+ dst += nblocks * SM4_BLOCK_SIZE;
+ src += nblocks * SM4_BLOCK_SIZE;
+ nbytes -= nblocks * SM4_BLOCK_SIZE;
+ }
/* tail */
if (walk.nbytes == walk.total && nbytes > 0) {
--
2.24.3 (Apple Git-128)
More information about the linux-arm-kernel
mailing list