2 * linux/arch/arm64/crypto/aes-ce.S - AES cipher for ARMv8 with
5 * Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
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.
12 #include <linux/linkage.h>
14 #define AES_ENTRY(func) ENTRY(ce_ ## func)
15 #define AES_ENDPROC(func) ENDPROC(ce_ ## func)
19 /* preload all round keys */
20 .macro load_round_keys, rounds, rk
22 blo 2222f /* 128 bits */
23 beq 1111f /* 192 bits */
24 ld1 {v17.16b-v18.16b}, [\rk], #32
25 1111: ld1 {v19.16b-v20.16b}, [\rk], #32
26 2222: ld1 {v21.16b-v24.16b}, [\rk], #64
27 ld1 {v25.16b-v28.16b}, [\rk], #64
28 ld1 {v29.16b-v31.16b}, [\rk]
31 /* prepare for encryption with key in rk[] */
32 .macro enc_prepare, rounds, rk, ignore
33 load_round_keys \rounds, \rk
36 /* prepare for encryption (again) but with new key in rk[] */
37 .macro enc_switch_key, rounds, rk, ignore
38 load_round_keys \rounds, \rk
41 /* prepare for decryption with key in rk[] */
42 .macro dec_prepare, rounds, rk, ignore
43 load_round_keys \rounds, \rk
46 .macro do_enc_Nx, de, mc, k, i0, i1, i2, i3
47 aes\de \i0\().16b, \k\().16b
48 aes\mc \i0\().16b, \i0\().16b
50 aes\de \i1\().16b, \k\().16b
51 aes\mc \i1\().16b, \i1\().16b
53 aes\de \i2\().16b, \k\().16b
54 aes\mc \i2\().16b, \i2\().16b
55 aes\de \i3\().16b, \k\().16b
56 aes\mc \i3\().16b, \i3\().16b
61 /* up to 4 interleaved encryption rounds with the same round key */
62 .macro round_Nx, enc, k, i0, i1, i2, i3
64 do_enc_Nx e, mc, \k, \i0, \i1, \i2, \i3
66 do_enc_Nx d, imc, \k, \i0, \i1, \i2, \i3
70 /* up to 4 interleaved final rounds */
71 .macro fin_round_Nx, de, k, k2, i0, i1, i2, i3
72 aes\de \i0\().16b, \k\().16b
74 aes\de \i1\().16b, \k\().16b
76 aes\de \i2\().16b, \k\().16b
77 aes\de \i3\().16b, \k\().16b
80 eor \i0\().16b, \i0\().16b, \k2\().16b
82 eor \i1\().16b, \i1\().16b, \k2\().16b
84 eor \i2\().16b, \i2\().16b, \k2\().16b
85 eor \i3\().16b, \i3\().16b, \k2\().16b
90 /* up to 4 interleaved blocks */
91 .macro do_block_Nx, enc, rounds, i0, i1, i2, i3
93 blo 2222f /* 128 bits */
94 beq 1111f /* 192 bits */
95 round_Nx \enc, v17, \i0, \i1, \i2, \i3
96 round_Nx \enc, v18, \i0, \i1, \i2, \i3
97 1111: round_Nx \enc, v19, \i0, \i1, \i2, \i3
98 round_Nx \enc, v20, \i0, \i1, \i2, \i3
99 2222: .irp key, v21, v22, v23, v24, v25, v26, v27, v28, v29
100 round_Nx \enc, \key, \i0, \i1, \i2, \i3
102 fin_round_Nx \enc, v30, v31, \i0, \i1, \i2, \i3
105 .macro encrypt_block, in, rounds, t0, t1, t2
106 do_block_Nx e, \rounds, \in
109 .macro encrypt_block2x, i0, i1, rounds, t0, t1, t2
110 do_block_Nx e, \rounds, \i0, \i1
113 .macro encrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2
114 do_block_Nx e, \rounds, \i0, \i1, \i2, \i3
117 .macro decrypt_block, in, rounds, t0, t1, t2
118 do_block_Nx d, \rounds, \in
121 .macro decrypt_block2x, i0, i1, rounds, t0, t1, t2
122 do_block_Nx d, \rounds, \i0, \i1
125 .macro decrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2
126 do_block_Nx d, \rounds, \i0, \i1, \i2, \i3
129 #include "aes-modes.S"