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gerrit.nordix.org / codeaurora / cp-linux / 8d8f6542b666daf5e87de156590e635c2c4da0c0 / . / arch / arm64 / crypto / aes-ce.S
blob: b46093d567e5449256dbf3bf1d4981144bdd8739 [file] [log] [blame]
Kyle Swenson8d8f6542021-03-15 11:02:55 -0600[diff] [blame^]1/*
2 * linux/arch/arm64/crypto/aes-ce.S - AES cipher for ARMv8 with
3 * Crypto Extensions
4 *
5 * Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/linkage.h>
13#include <asm/assembler.h>
14
15#define AES_ENTRY(func) ENTRY(ce_ ## func)
16#define AES_ENDPROC(func) ENDPROC(ce_ ## func)
17
18 .arch armv8-a+crypto
19
20 /* preload all round keys */
21 .macro load_round_keys, rounds, rk
22 cmp \rounds, #12
23 blo 2222f /* 128 bits */
24 beq 1111f /* 192 bits */
25 ld1 {v17.16b-v18.16b}, [\rk], #32
261111: ld1 {v19.16b-v20.16b}, [\rk], #32
272222: ld1 {v21.16b-v24.16b}, [\rk], #64
28 ld1 {v25.16b-v28.16b}, [\rk], #64
29 ld1 {v29.16b-v31.16b}, [\rk]
30 .endm
31
32 /* prepare for encryption with key in rk[] */
33 .macro enc_prepare, rounds, rk, ignore
34 load_round_keys \rounds, \rk
35 .endm
36
37 /* prepare for encryption (again) but with new key in rk[] */
38 .macro enc_switch_key, rounds, rk, ignore
39 load_round_keys \rounds, \rk
40 .endm
41
42 /* prepare for decryption with key in rk[] */
43 .macro dec_prepare, rounds, rk, ignore
44 load_round_keys \rounds, \rk
45 .endm
46
47 .macro do_enc_Nx, de, mc, k, i0, i1, i2, i3
48 aes\de \i0\().16b, \k\().16b
49 aes\mc \i0\().16b, \i0\().16b
50 .ifnb \i1
51 aes\de \i1\().16b, \k\().16b
52 aes\mc \i1\().16b, \i1\().16b
53 .ifnb \i3
54 aes\de \i2\().16b, \k\().16b
55 aes\mc \i2\().16b, \i2\().16b
56 aes\de \i3\().16b, \k\().16b
57 aes\mc \i3\().16b, \i3\().16b
58 .endif
59 .endif
60 .endm
61
62 /* up to 4 interleaved encryption rounds with the same round key */
63 .macro round_Nx, enc, k, i0, i1, i2, i3
64 .ifc \enc, e
65 do_enc_Nx e, mc, \k, \i0, \i1, \i2, \i3
66 .else
67 do_enc_Nx d, imc, \k, \i0, \i1, \i2, \i3
68 .endif
69 .endm
70
71 /* up to 4 interleaved final rounds */
72 .macro fin_round_Nx, de, k, k2, i0, i1, i2, i3
73 aes\de \i0\().16b, \k\().16b
74 .ifnb \i1
75 aes\de \i1\().16b, \k\().16b
76 .ifnb \i3
77 aes\de \i2\().16b, \k\().16b
78 aes\de \i3\().16b, \k\().16b
79 .endif
80 .endif
81 eor \i0\().16b, \i0\().16b, \k2\().16b
82 .ifnb \i1
83 eor \i1\().16b, \i1\().16b, \k2\().16b
84 .ifnb \i3
85 eor \i2\().16b, \i2\().16b, \k2\().16b
86 eor \i3\().16b, \i3\().16b, \k2\().16b
87 .endif
88 .endif
89 .endm
90
91 /* up to 4 interleaved blocks */
92 .macro do_block_Nx, enc, rounds, i0, i1, i2, i3
93 cmp \rounds, #12
94 blo 2222f /* 128 bits */
95 beq 1111f /* 192 bits */
96 round_Nx \enc, v17, \i0, \i1, \i2, \i3
97 round_Nx \enc, v18, \i0, \i1, \i2, \i3
981111: round_Nx \enc, v19, \i0, \i1, \i2, \i3
99 round_Nx \enc, v20, \i0, \i1, \i2, \i3
1002222: .irp key, v21, v22, v23, v24, v25, v26, v27, v28, v29
101 round_Nx \enc, \key, \i0, \i1, \i2, \i3
102 .endr
103 fin_round_Nx \enc, v30, v31, \i0, \i1, \i2, \i3
104 .endm
105
106 .macro encrypt_block, in, rounds, t0, t1, t2
107 do_block_Nx e, \rounds, \in
108 .endm
109
110 .macro encrypt_block2x, i0, i1, rounds, t0, t1, t2
111 do_block_Nx e, \rounds, \i0, \i1
112 .endm
113
114 .macro encrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2
115 do_block_Nx e, \rounds, \i0, \i1, \i2, \i3
116 .endm
117
118 .macro decrypt_block, in, rounds, t0, t1, t2
119 do_block_Nx d, \rounds, \in
120 .endm
121
122 .macro decrypt_block2x, i0, i1, rounds, t0, t1, t2
123 do_block_Nx d, \rounds, \i0, \i1
124 .endm
125
126 .macro decrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2
127 do_block_Nx d, \rounds, \i0, \i1, \i2, \i3
128 .endm
129
130#include "aes-modes.S"