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/* 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_ENTRY(func) ENTRY(ce_ ## func)
#define AES_ENDPROC(func) ENDPROC(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, rounds, rk
cmp \rounds, #12
blo 2222f /* 128 bits */
beq 1111f /* 192 bits */
ld1 {v17.4s-v18.4s}, [\rk], #32
1111: ld1 {v19.4s-v20.4s}, [\rk], #32
2222: ld1 {v21.4s-v24.4s}, [\rk], #64
ld1 {v25.4s-v28.4s}, [\rk], #64
ld1 {v29.4s-v31.4s}, [\rk]
.endm
/* prepare for encryption with key in rk[] */
.macro enc_prepare, rounds, rk, temp
mov \temp, \rk
load_round_keys \rounds, \temp
.endm
/* prepare for encryption (again) but with new key in rk[] */
.macro enc_switch_key, rounds, rk, temp
mov \temp, \rk
load_round_keys \rounds, \temp
.endm
/* prepare for decryption with key in rk[] */
.macro dec_prepare, rounds, rk, temp
mov \temp, \rk
load_round_keys \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
cmp \rounds, #12
blo 2222f /* 128 bits */
beq 1111f /* 192 bits */
round_Nx \enc, v17, \i0, \i1, \i2, \i3, \i4
round_Nx \enc, v18, \i0, \i1, \i2, \i3, \i4
1111: round_Nx \enc, v19, \i0, \i1, \i2, \i3, \i4
round_Nx \enc, v20, \i0, \i1, \i2, \i3, \i4
2222: .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"
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