1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * sm3-ce-core.S - SM3 secure hash using ARMv8.2 Crypto Extensions
4 *
5 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
6 */
7
8 #include <linux/linkage.h>
9 #include <linux/cfi_types.h>
10 #include <asm/assembler.h>
11
12 .irp b, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
13 .set .Lv\b\().4s, \b
14 .endr
15
16 .macro sm3partw1, rd, rn, rm
17 .inst 0xce60c000 | .L\rd | (.L\rn << 5) | (.L\rm << 16)
18 .endm
19
20 .macro sm3partw2, rd, rn, rm
21 .inst 0xce60c400 | .L\rd | (.L\rn << 5) | (.L\rm << 16)
22 .endm
23
24 .macro sm3ss1, rd, rn, rm, ra
25 .inst 0xce400000 | .L\rd | (.L\rn << 5) | (.L\ra << 10) | (.L\rm << 16)
26 .endm
27
28 .macro sm3tt1a, rd, rn, rm, imm2
29 .inst 0xce408000 | .L\rd | (.L\rn << 5) | ((\imm2) << 12) | (.L\rm << 16)
30 .endm
31
32 .macro sm3tt1b, rd, rn, rm, imm2
33 .inst 0xce408400 | .L\rd | (.L\rn << 5) | ((\imm2) << 12) | (.L\rm << 16)
34 .endm
35
36 .macro sm3tt2a, rd, rn, rm, imm2
37 .inst 0xce408800 | .L\rd | (.L\rn << 5) | ((\imm2) << 12) | (.L\rm << 16)
38 .endm
39
40 .macro sm3tt2b, rd, rn, rm, imm2
41 .inst 0xce408c00 | .L\rd | (.L\rn << 5) | ((\imm2) << 12) | (.L\rm << 16)
42 .endm
43
44 .macro round, ab, s0, t0, t1, i
45 sm3ss1 v5.4s, v8.4s, \t0\().4s, v9.4s
46 shl \t1\().4s, \t0\().4s, #1
47 sri \t1\().4s, \t0\().4s, #31
48 sm3tt1\ab v8.4s, v5.4s, v10.4s, \i
49 sm3tt2\ab v9.4s, v5.4s, \s0\().4s, \i
50 .endm
51
52 .macro qround, ab, s0, s1, s2, s3, s4
53 .ifnb \s4
54 ext \s4\().16b, \s1\().16b, \s2\().16b, #12
55 ext v6.16b, \s0\().16b, \s1\().16b, #12
56 ext v7.16b, \s2\().16b, \s3\().16b, #8
57 sm3partw1 \s4\().4s, \s0\().4s, \s3\().4s
58 .endif
59
60 eor v10.16b, \s0\().16b, \s1\().16b
61
62 round \ab, \s0, v11, v12, 0
63 round \ab, \s0, v12, v11, 1
64 round \ab, \s0, v11, v12, 2
65 round \ab, \s0, v12, v11, 3
66
67 .ifnb \s4
68 sm3partw2 \s4\().4s, v7.4s, v6.4s
69 .endif
70 .endm
71
72 /*
73 * void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
74 * int blocks)
75 */
76 .text
77 SYM_TYPED_FUNC_START(sm3_ce_transform)
78 /* load state */
79 ld1 {v8.4s-v9.4s}, [x0]
80 rev64 v8.4s, v8.4s
81 rev64 v9.4s, v9.4s
82 ext v8.16b, v8.16b, v8.16b, #8
83 ext v9.16b, v9.16b, v9.16b, #8
84
85 adr_l x8, .Lt
86 ldp s13, s14, [x8]
87
88 /* load input */
89 0: ld1 {v0.16b-v3.16b}, [x1], #64
90 sub w2, w2, #1
91
92 mov v15.16b, v8.16b
93 mov v16.16b, v9.16b
94
95 CPU_LE( rev32 v0.16b, v0.16b )
96 CPU_LE( rev32 v1.16b, v1.16b )
97 CPU_LE( rev32 v2.16b, v2.16b )
98 CPU_LE( rev32 v3.16b, v3.16b )
99
100 ext v11.16b, v13.16b, v13.16b, #4
101
102 qround a, v0, v1, v2, v3, v4
103 qround a, v1, v2, v3, v4, v0
104 qround a, v2, v3, v4, v0, v1
105 qround a, v3, v4, v0, v1, v2
106
107 ext v11.16b, v14.16b, v14.16b, #4
108
109 qround b, v4, v0, v1, v2, v3
110 qround b, v0, v1, v2, v3, v4
111 qround b, v1, v2, v3, v4, v0
112 qround b, v2, v3, v4, v0, v1
113 qround b, v3, v4, v0, v1, v2
114 qround b, v4, v0, v1, v2, v3
115 qround b, v0, v1, v2, v3, v4
116 qround b, v1, v2, v3, v4, v0
117 qround b, v2, v3, v4, v0, v1
118 qround b, v3, v4
119 qround b, v4, v0
120 qround b, v0, v1
121
122 eor v8.16b, v8.16b, v15.16b
123 eor v9.16b, v9.16b, v16.16b
124
125 /* handled all input blocks? */
126 cbnz w2, 0b
127
128 /* save state */
129 rev64 v8.4s, v8.4s
130 rev64 v9.4s, v9.4s
131 ext v8.16b, v8.16b, v8.16b, #8
132 ext v9.16b, v9.16b, v9.16b, #8
133 st1 {v8.4s-v9.4s}, [x0]
134 ret
135 SYM_FUNC_END(sm3_ce_transform)
136
137 .section ".rodata", "a"
138 .align 3
139 .Lt: .word 0x79cc4519, 0x9d8a7a87
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