| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * linux/arch/arm64/crypto/aes-ce.S - AES cipher for ARMv8 with |
| * Crypto Extensions |
| * |
| * Copyright (C) 2013 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org> |
| */ |
| |
| #include <linux/linkage.h> |
| #include <asm/assembler.h> |
| |
| #define AES_FUNC_START(func) SYM_FUNC_START(ce_ ## func) |
| #define AES_FUNC_END(func) SYM_FUNC_END(ce_ ## func) |
| |
| .arch armv8-a+crypto |
| |
| xtsmask .req v16 |
| cbciv .req v16 |
| vctr .req v16 |
| |
| .macro xts_reload_mask, tmp |
| .endm |
| |
| .macro xts_cts_skip_tw, reg, lbl |
| .endm |
| |
| /* preload all round keys */ |
| .macro load_round_keys, rk, nr, tmp |
| add \tmp, \rk, \nr, sxtw #4 |
| sub \tmp, \tmp, #160 |
| ld1 {v17.4s-v20.4s}, [\rk] |
| ld1 {v21.4s-v24.4s}, [\tmp], #64 |
| ld1 {v25.4s-v28.4s}, [\tmp], #64 |
| ld1 {v29.4s-v31.4s}, [\tmp] |
| .endm |
| |
| /* prepare for encryption with key in rk[] */ |
| .macro enc_prepare, rounds, rk, temp |
| load_round_keys \rk, \rounds, \temp |
| .endm |
| |
| /* prepare for encryption (again) but with new key in rk[] */ |
| .macro enc_switch_key, rounds, rk, temp |
| load_round_keys \rk, \rounds, \temp |
| .endm |
| |
| /* prepare for decryption with key in rk[] */ |
| .macro dec_prepare, rounds, rk, temp |
| load_round_keys \rk, \rounds, \temp |
| .endm |
| |
| .macro do_enc_Nx, de, mc, k, i0, i1, i2, i3, i4 |
| aes\de \i0\().16b, \k\().16b |
| aes\mc \i0\().16b, \i0\().16b |
| .ifnb \i1 |
| aes\de \i1\().16b, \k\().16b |
| aes\mc \i1\().16b, \i1\().16b |
| .ifnb \i3 |
| aes\de \i2\().16b, \k\().16b |
| aes\mc \i2\().16b, \i2\().16b |
| aes\de \i3\().16b, \k\().16b |
| aes\mc \i3\().16b, \i3\().16b |
| .ifnb \i4 |
| aes\de \i4\().16b, \k\().16b |
| aes\mc \i4\().16b, \i4\().16b |
| .endif |
| .endif |
| .endif |
| .endm |
| |
| /* up to 5 interleaved encryption rounds with the same round key */ |
| .macro round_Nx, enc, k, i0, i1, i2, i3, i4 |
| .ifc \enc, e |
| do_enc_Nx e, mc, \k, \i0, \i1, \i2, \i3, \i4 |
| .else |
| do_enc_Nx d, imc, \k, \i0, \i1, \i2, \i3, \i4 |
| .endif |
| .endm |
| |
| /* up to 5 interleaved final rounds */ |
| .macro fin_round_Nx, de, k, k2, i0, i1, i2, i3, i4 |
| aes\de \i0\().16b, \k\().16b |
| .ifnb \i1 |
| aes\de \i1\().16b, \k\().16b |
| .ifnb \i3 |
| aes\de \i2\().16b, \k\().16b |
| aes\de \i3\().16b, \k\().16b |
| .ifnb \i4 |
| aes\de \i4\().16b, \k\().16b |
| .endif |
| .endif |
| .endif |
| eor \i0\().16b, \i0\().16b, \k2\().16b |
| .ifnb \i1 |
| eor \i1\().16b, \i1\().16b, \k2\().16b |
| .ifnb \i3 |
| eor \i2\().16b, \i2\().16b, \k2\().16b |
| eor \i3\().16b, \i3\().16b, \k2\().16b |
| .ifnb \i4 |
| eor \i4\().16b, \i4\().16b, \k2\().16b |
| .endif |
| .endif |
| .endif |
| .endm |
| |
| /* up to 5 interleaved blocks */ |
| .macro do_block_Nx, enc, rounds, i0, i1, i2, i3, i4 |
| tbz \rounds, #2, .L\@ /* 128 bits */ |
| round_Nx \enc, v17, \i0, \i1, \i2, \i3, \i4 |
| round_Nx \enc, v18, \i0, \i1, \i2, \i3, \i4 |
| tbz \rounds, #1, .L\@ /* 192 bits */ |
| round_Nx \enc, v19, \i0, \i1, \i2, \i3, \i4 |
| round_Nx \enc, v20, \i0, \i1, \i2, \i3, \i4 |
| .L\@: .irp key, v21, v22, v23, v24, v25, v26, v27, v28, v29 |
| round_Nx \enc, \key, \i0, \i1, \i2, \i3, \i4 |
| .endr |
| fin_round_Nx \enc, v30, v31, \i0, \i1, \i2, \i3, \i4 |
| .endm |
| |
| .macro encrypt_block, in, rounds, t0, t1, t2 |
| do_block_Nx e, \rounds, \in |
| .endm |
| |
| .macro encrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2 |
| do_block_Nx e, \rounds, \i0, \i1, \i2, \i3 |
| .endm |
| |
| .macro encrypt_block5x, i0, i1, i2, i3, i4, rounds, t0, t1, t2 |
| do_block_Nx e, \rounds, \i0, \i1, \i2, \i3, \i4 |
| .endm |
| |
| .macro decrypt_block, in, rounds, t0, t1, t2 |
| do_block_Nx d, \rounds, \in |
| .endm |
| |
| .macro decrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2 |
| do_block_Nx d, \rounds, \i0, \i1, \i2, \i3 |
| .endm |
| |
| .macro decrypt_block5x, i0, i1, i2, i3, i4, rounds, t0, t1, t2 |
| do_block_Nx d, \rounds, \i0, \i1, \i2, \i3, \i4 |
| .endm |
| |
| #define MAX_STRIDE 5 |
| |
| #include "aes-modes.S" |
