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5f6cb2e617
Instead of calling into kernel_neon_end() and kernel_neon_begin() (and
potentially into schedule()) from the assembler code when running in
task mode and a reschedule is pending, perform only the preempt count
check in assembler, but simply return early in this case, and let the C
code deal with the consequences.
This reverts commit 6caf7adc5e.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
207 lines
6.5 KiB
ArmAsm
207 lines
6.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* sha512-ce-core.S - core SHA-384/SHA-512 transform using v8 Crypto Extensions
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*
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* Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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.irp b,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19
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.set .Lq\b, \b
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.set .Lv\b\().2d, \b
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.endr
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.macro sha512h, rd, rn, rm
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.inst 0xce608000 | .L\rd | (.L\rn << 5) | (.L\rm << 16)
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.endm
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.macro sha512h2, rd, rn, rm
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.inst 0xce608400 | .L\rd | (.L\rn << 5) | (.L\rm << 16)
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.endm
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.macro sha512su0, rd, rn
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.inst 0xcec08000 | .L\rd | (.L\rn << 5)
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.endm
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.macro sha512su1, rd, rn, rm
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.inst 0xce608800 | .L\rd | (.L\rn << 5) | (.L\rm << 16)
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.endm
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/*
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* The SHA-512 round constants
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*/
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.section ".rodata", "a"
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.align 4
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.Lsha512_rcon:
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.quad 0x428a2f98d728ae22, 0x7137449123ef65cd
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.quad 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc
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.quad 0x3956c25bf348b538, 0x59f111f1b605d019
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.quad 0x923f82a4af194f9b, 0xab1c5ed5da6d8118
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.quad 0xd807aa98a3030242, 0x12835b0145706fbe
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.quad 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2
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.quad 0x72be5d74f27b896f, 0x80deb1fe3b1696b1
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.quad 0x9bdc06a725c71235, 0xc19bf174cf692694
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.quad 0xe49b69c19ef14ad2, 0xefbe4786384f25e3
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.quad 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65
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.quad 0x2de92c6f592b0275, 0x4a7484aa6ea6e483
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.quad 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5
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.quad 0x983e5152ee66dfab, 0xa831c66d2db43210
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.quad 0xb00327c898fb213f, 0xbf597fc7beef0ee4
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.quad 0xc6e00bf33da88fc2, 0xd5a79147930aa725
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.quad 0x06ca6351e003826f, 0x142929670a0e6e70
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.quad 0x27b70a8546d22ffc, 0x2e1b21385c26c926
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.quad 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df
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.quad 0x650a73548baf63de, 0x766a0abb3c77b2a8
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.quad 0x81c2c92e47edaee6, 0x92722c851482353b
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.quad 0xa2bfe8a14cf10364, 0xa81a664bbc423001
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.quad 0xc24b8b70d0f89791, 0xc76c51a30654be30
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.quad 0xd192e819d6ef5218, 0xd69906245565a910
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.quad 0xf40e35855771202a, 0x106aa07032bbd1b8
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.quad 0x19a4c116b8d2d0c8, 0x1e376c085141ab53
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.quad 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8
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.quad 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb
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.quad 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3
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.quad 0x748f82ee5defb2fc, 0x78a5636f43172f60
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.quad 0x84c87814a1f0ab72, 0x8cc702081a6439ec
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.quad 0x90befffa23631e28, 0xa4506cebde82bde9
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.quad 0xbef9a3f7b2c67915, 0xc67178f2e372532b
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.quad 0xca273eceea26619c, 0xd186b8c721c0c207
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.quad 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178
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.quad 0x06f067aa72176fba, 0x0a637dc5a2c898a6
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.quad 0x113f9804bef90dae, 0x1b710b35131c471b
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.quad 0x28db77f523047d84, 0x32caab7b40c72493
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.quad 0x3c9ebe0a15c9bebc, 0x431d67c49c100d4c
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.quad 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a
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.quad 0x5fcb6fab3ad6faec, 0x6c44198c4a475817
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.macro dround, i0, i1, i2, i3, i4, rc0, rc1, in0, in1, in2, in3, in4
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.ifnb \rc1
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ld1 {v\rc1\().2d}, [x4], #16
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.endif
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add v5.2d, v\rc0\().2d, v\in0\().2d
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ext v6.16b, v\i2\().16b, v\i3\().16b, #8
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ext v5.16b, v5.16b, v5.16b, #8
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ext v7.16b, v\i1\().16b, v\i2\().16b, #8
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add v\i3\().2d, v\i3\().2d, v5.2d
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.ifnb \in1
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ext v5.16b, v\in3\().16b, v\in4\().16b, #8
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sha512su0 v\in0\().2d, v\in1\().2d
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.endif
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sha512h q\i3, q6, v7.2d
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.ifnb \in1
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sha512su1 v\in0\().2d, v\in2\().2d, v5.2d
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.endif
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add v\i4\().2d, v\i1\().2d, v\i3\().2d
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sha512h2 q\i3, q\i1, v\i0\().2d
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.endm
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/*
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* void sha512_ce_transform(struct sha512_state *sst, u8 const *src,
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* int blocks)
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*/
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.text
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SYM_FUNC_START(sha512_ce_transform)
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/* load state */
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ld1 {v8.2d-v11.2d}, [x0]
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/* load first 4 round constants */
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adr_l x3, .Lsha512_rcon
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ld1 {v20.2d-v23.2d}, [x3], #64
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/* load input */
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0: ld1 {v12.2d-v15.2d}, [x1], #64
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ld1 {v16.2d-v19.2d}, [x1], #64
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sub w2, w2, #1
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CPU_LE( rev64 v12.16b, v12.16b )
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CPU_LE( rev64 v13.16b, v13.16b )
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CPU_LE( rev64 v14.16b, v14.16b )
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CPU_LE( rev64 v15.16b, v15.16b )
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CPU_LE( rev64 v16.16b, v16.16b )
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CPU_LE( rev64 v17.16b, v17.16b )
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CPU_LE( rev64 v18.16b, v18.16b )
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CPU_LE( rev64 v19.16b, v19.16b )
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mov x4, x3 // rc pointer
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mov v0.16b, v8.16b
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mov v1.16b, v9.16b
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mov v2.16b, v10.16b
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mov v3.16b, v11.16b
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// v0 ab cd -- ef gh ab
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// v1 cd -- ef gh ab cd
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// v2 ef gh ab cd -- ef
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// v3 gh ab cd -- ef gh
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// v4 -- ef gh ab cd --
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dround 0, 1, 2, 3, 4, 20, 24, 12, 13, 19, 16, 17
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dround 3, 0, 4, 2, 1, 21, 25, 13, 14, 12, 17, 18
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dround 2, 3, 1, 4, 0, 22, 26, 14, 15, 13, 18, 19
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dround 4, 2, 0, 1, 3, 23, 27, 15, 16, 14, 19, 12
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dround 1, 4, 3, 0, 2, 24, 28, 16, 17, 15, 12, 13
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dround 0, 1, 2, 3, 4, 25, 29, 17, 18, 16, 13, 14
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dround 3, 0, 4, 2, 1, 26, 30, 18, 19, 17, 14, 15
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dround 2, 3, 1, 4, 0, 27, 31, 19, 12, 18, 15, 16
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dround 4, 2, 0, 1, 3, 28, 24, 12, 13, 19, 16, 17
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dround 1, 4, 3, 0, 2, 29, 25, 13, 14, 12, 17, 18
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dround 0, 1, 2, 3, 4, 30, 26, 14, 15, 13, 18, 19
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dround 3, 0, 4, 2, 1, 31, 27, 15, 16, 14, 19, 12
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dround 2, 3, 1, 4, 0, 24, 28, 16, 17, 15, 12, 13
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dround 4, 2, 0, 1, 3, 25, 29, 17, 18, 16, 13, 14
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dround 1, 4, 3, 0, 2, 26, 30, 18, 19, 17, 14, 15
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dround 0, 1, 2, 3, 4, 27, 31, 19, 12, 18, 15, 16
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dround 3, 0, 4, 2, 1, 28, 24, 12, 13, 19, 16, 17
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dround 2, 3, 1, 4, 0, 29, 25, 13, 14, 12, 17, 18
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dround 4, 2, 0, 1, 3, 30, 26, 14, 15, 13, 18, 19
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dround 1, 4, 3, 0, 2, 31, 27, 15, 16, 14, 19, 12
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dround 0, 1, 2, 3, 4, 24, 28, 16, 17, 15, 12, 13
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dround 3, 0, 4, 2, 1, 25, 29, 17, 18, 16, 13, 14
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dround 2, 3, 1, 4, 0, 26, 30, 18, 19, 17, 14, 15
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dround 4, 2, 0, 1, 3, 27, 31, 19, 12, 18, 15, 16
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dround 1, 4, 3, 0, 2, 28, 24, 12, 13, 19, 16, 17
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dround 0, 1, 2, 3, 4, 29, 25, 13, 14, 12, 17, 18
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dround 3, 0, 4, 2, 1, 30, 26, 14, 15, 13, 18, 19
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dround 2, 3, 1, 4, 0, 31, 27, 15, 16, 14, 19, 12
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dround 4, 2, 0, 1, 3, 24, 28, 16, 17, 15, 12, 13
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dround 1, 4, 3, 0, 2, 25, 29, 17, 18, 16, 13, 14
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dround 0, 1, 2, 3, 4, 26, 30, 18, 19, 17, 14, 15
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dround 3, 0, 4, 2, 1, 27, 31, 19, 12, 18, 15, 16
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dround 2, 3, 1, 4, 0, 28, 24, 12
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dround 4, 2, 0, 1, 3, 29, 25, 13
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dround 1, 4, 3, 0, 2, 30, 26, 14
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dround 0, 1, 2, 3, 4, 31, 27, 15
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dround 3, 0, 4, 2, 1, 24, , 16
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dround 2, 3, 1, 4, 0, 25, , 17
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dround 4, 2, 0, 1, 3, 26, , 18
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dround 1, 4, 3, 0, 2, 27, , 19
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/* update state */
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add v8.2d, v8.2d, v0.2d
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add v9.2d, v9.2d, v1.2d
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add v10.2d, v10.2d, v2.2d
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add v11.2d, v11.2d, v3.2d
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cond_yield 3f, x4
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/* handled all input blocks? */
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cbnz w2, 0b
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/* store new state */
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3: st1 {v8.2d-v11.2d}, [x0]
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mov w0, w2
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ret
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SYM_FUNC_END(sha512_ce_transform)
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