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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/crypto/aes-ce-core.S | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/crypto/aes-ce-core.S')
-rw-r--r-- | kernel/arch/arm/crypto/aes-ce-core.S | 518 |
1 files changed, 518 insertions, 0 deletions
diff --git a/kernel/arch/arm/crypto/aes-ce-core.S b/kernel/arch/arm/crypto/aes-ce-core.S new file mode 100644 index 000000000..8cfa468ee --- /dev/null +++ b/kernel/arch/arm/crypto/aes-ce-core.S @@ -0,0 +1,518 @@ +/* + * aes-ce-core.S - AES in CBC/CTR/XTS mode using ARMv8 Crypto Extensions + * + * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/linkage.h> +#include <asm/assembler.h> + + .text + .fpu crypto-neon-fp-armv8 + .align 3 + + .macro enc_round, state, key + aese.8 \state, \key + aesmc.8 \state, \state + .endm + + .macro dec_round, state, key + aesd.8 \state, \key + aesimc.8 \state, \state + .endm + + .macro enc_dround, key1, key2 + enc_round q0, \key1 + enc_round q0, \key2 + .endm + + .macro dec_dround, key1, key2 + dec_round q0, \key1 + dec_round q0, \key2 + .endm + + .macro enc_fround, key1, key2, key3 + enc_round q0, \key1 + aese.8 q0, \key2 + veor q0, q0, \key3 + .endm + + .macro dec_fround, key1, key2, key3 + dec_round q0, \key1 + aesd.8 q0, \key2 + veor q0, q0, \key3 + .endm + + .macro enc_dround_3x, key1, key2 + enc_round q0, \key1 + enc_round q1, \key1 + enc_round q2, \key1 + enc_round q0, \key2 + enc_round q1, \key2 + enc_round q2, \key2 + .endm + + .macro dec_dround_3x, key1, key2 + dec_round q0, \key1 + dec_round q1, \key1 + dec_round q2, \key1 + dec_round q0, \key2 + dec_round q1, \key2 + dec_round q2, \key2 + .endm + + .macro enc_fround_3x, key1, key2, key3 + enc_round q0, \key1 + enc_round q1, \key1 + enc_round q2, \key1 + aese.8 q0, \key2 + aese.8 q1, \key2 + aese.8 q2, \key2 + veor q0, q0, \key3 + veor q1, q1, \key3 + veor q2, q2, \key3 + .endm + + .macro dec_fround_3x, key1, key2, key3 + dec_round q0, \key1 + dec_round q1, \key1 + dec_round q2, \key1 + aesd.8 q0, \key2 + aesd.8 q1, \key2 + aesd.8 q2, \key2 + veor q0, q0, \key3 + veor q1, q1, \key3 + veor q2, q2, \key3 + .endm + + .macro do_block, dround, fround + cmp r3, #12 @ which key size? + vld1.8 {q10-q11}, [ip]! + \dround q8, q9 + vld1.8 {q12-q13}, [ip]! + \dround q10, q11 + vld1.8 {q10-q11}, [ip]! + \dround q12, q13 + vld1.8 {q12-q13}, [ip]! + \dround q10, q11 + blo 0f @ AES-128: 10 rounds + vld1.8 {q10-q11}, [ip]! + beq 1f @ AES-192: 12 rounds + \dround q12, q13 + vld1.8 {q12-q13}, [ip] + \dround q10, q11 +0: \fround q12, q13, q14 + bx lr + +1: \dround q12, q13 + \fround q10, q11, q14 + bx lr + .endm + + /* + * Internal, non-AAPCS compliant functions that implement the core AES + * transforms. These should preserve all registers except q0 - q2 and ip + * Arguments: + * q0 : first in/output block + * q1 : second in/output block (_3x version only) + * q2 : third in/output block (_3x version only) + * q8 : first round key + * q9 : secound round key + * ip : address of 3rd round key + * q14 : final round key + * r3 : number of rounds + */ + .align 6 +aes_encrypt: + add ip, r2, #32 @ 3rd round key +.Laes_encrypt_tweak: + do_block enc_dround, enc_fround +ENDPROC(aes_encrypt) + + .align 6 +aes_decrypt: + add ip, r2, #32 @ 3rd round key + do_block dec_dround, dec_fround +ENDPROC(aes_decrypt) + + .align 6 +aes_encrypt_3x: + add ip, r2, #32 @ 3rd round key + do_block enc_dround_3x, enc_fround_3x +ENDPROC(aes_encrypt_3x) + + .align 6 +aes_decrypt_3x: + add ip, r2, #32 @ 3rd round key + do_block dec_dround_3x, dec_fround_3x +ENDPROC(aes_decrypt_3x) + + .macro prepare_key, rk, rounds + add ip, \rk, \rounds, lsl #4 + vld1.8 {q8-q9}, [\rk] @ load first 2 round keys + vld1.8 {q14}, [ip] @ load last round key + .endm + + /* + * aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, + * int blocks) + * aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, + * int blocks) + */ +ENTRY(ce_aes_ecb_encrypt) + push {r4, lr} + ldr r4, [sp, #8] + prepare_key r2, r3 +.Lecbencloop3x: + subs r4, r4, #3 + bmi .Lecbenc1x + vld1.8 {q0-q1}, [r1, :64]! + vld1.8 {q2}, [r1, :64]! + bl aes_encrypt_3x + vst1.8 {q0-q1}, [r0, :64]! + vst1.8 {q2}, [r0, :64]! + b .Lecbencloop3x +.Lecbenc1x: + adds r4, r4, #3 + beq .Lecbencout +.Lecbencloop: + vld1.8 {q0}, [r1, :64]! + bl aes_encrypt + vst1.8 {q0}, [r0, :64]! + subs r4, r4, #1 + bne .Lecbencloop +.Lecbencout: + pop {r4, pc} +ENDPROC(ce_aes_ecb_encrypt) + +ENTRY(ce_aes_ecb_decrypt) + push {r4, lr} + ldr r4, [sp, #8] + prepare_key r2, r3 +.Lecbdecloop3x: + subs r4, r4, #3 + bmi .Lecbdec1x + vld1.8 {q0-q1}, [r1, :64]! + vld1.8 {q2}, [r1, :64]! + bl aes_decrypt_3x + vst1.8 {q0-q1}, [r0, :64]! + vst1.8 {q2}, [r0, :64]! + b .Lecbdecloop3x +.Lecbdec1x: + adds r4, r4, #3 + beq .Lecbdecout +.Lecbdecloop: + vld1.8 {q0}, [r1, :64]! + bl aes_decrypt + vst1.8 {q0}, [r0, :64]! + subs r4, r4, #1 + bne .Lecbdecloop +.Lecbdecout: + pop {r4, pc} +ENDPROC(ce_aes_ecb_decrypt) + + /* + * aes_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, + * int blocks, u8 iv[]) + * aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, + * int blocks, u8 iv[]) + */ +ENTRY(ce_aes_cbc_encrypt) + push {r4-r6, lr} + ldrd r4, r5, [sp, #16] + vld1.8 {q0}, [r5] + prepare_key r2, r3 +.Lcbcencloop: + vld1.8 {q1}, [r1, :64]! @ get next pt block + veor q0, q0, q1 @ ..and xor with iv + bl aes_encrypt + vst1.8 {q0}, [r0, :64]! + subs r4, r4, #1 + bne .Lcbcencloop + vst1.8 {q0}, [r5] + pop {r4-r6, pc} +ENDPROC(ce_aes_cbc_encrypt) + +ENTRY(ce_aes_cbc_decrypt) + push {r4-r6, lr} + ldrd r4, r5, [sp, #16] + vld1.8 {q6}, [r5] @ keep iv in q6 + prepare_key r2, r3 +.Lcbcdecloop3x: + subs r4, r4, #3 + bmi .Lcbcdec1x + vld1.8 {q0-q1}, [r1, :64]! + vld1.8 {q2}, [r1, :64]! + vmov q3, q0 + vmov q4, q1 + vmov q5, q2 + bl aes_decrypt_3x + veor q0, q0, q6 + veor q1, q1, q3 + veor q2, q2, q4 + vmov q6, q5 + vst1.8 {q0-q1}, [r0, :64]! + vst1.8 {q2}, [r0, :64]! + b .Lcbcdecloop3x +.Lcbcdec1x: + adds r4, r4, #3 + beq .Lcbcdecout + vmov q15, q14 @ preserve last round key +.Lcbcdecloop: + vld1.8 {q0}, [r1, :64]! @ get next ct block + veor q14, q15, q6 @ combine prev ct with last key + vmov q6, q0 + bl aes_decrypt + vst1.8 {q0}, [r0, :64]! + subs r4, r4, #1 + bne .Lcbcdecloop +.Lcbcdecout: + vst1.8 {q6}, [r5] @ keep iv in q6 + pop {r4-r6, pc} +ENDPROC(ce_aes_cbc_decrypt) + + /* + * aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, + * int blocks, u8 ctr[]) + */ +ENTRY(ce_aes_ctr_encrypt) + push {r4-r6, lr} + ldrd r4, r5, [sp, #16] + vld1.8 {q6}, [r5] @ load ctr + prepare_key r2, r3 + vmov r6, s27 @ keep swabbed ctr in r6 + rev r6, r6 + cmn r6, r4 @ 32 bit overflow? + bcs .Lctrloop +.Lctrloop3x: + subs r4, r4, #3 + bmi .Lctr1x + add r6, r6, #1 + vmov q0, q6 + vmov q1, q6 + rev ip, r6 + add r6, r6, #1 + vmov q2, q6 + vmov s7, ip + rev ip, r6 + add r6, r6, #1 + vmov s11, ip + vld1.8 {q3-q4}, [r1, :64]! + vld1.8 {q5}, [r1, :64]! + bl aes_encrypt_3x + veor q0, q0, q3 + veor q1, q1, q4 + veor q2, q2, q5 + rev ip, r6 + vst1.8 {q0-q1}, [r0, :64]! + vst1.8 {q2}, [r0, :64]! + vmov s27, ip + b .Lctrloop3x +.Lctr1x: + adds r4, r4, #3 + beq .Lctrout +.Lctrloop: + vmov q0, q6 + bl aes_encrypt + subs r4, r4, #1 + bmi .Lctrhalfblock @ blocks < 0 means 1/2 block + vld1.8 {q3}, [r1, :64]! + veor q3, q0, q3 + vst1.8 {q3}, [r0, :64]! + + adds r6, r6, #1 @ increment BE ctr + rev ip, r6 + vmov s27, ip + bcs .Lctrcarry + teq r4, #0 + bne .Lctrloop +.Lctrout: + vst1.8 {q6}, [r5] + pop {r4-r6, pc} + +.Lctrhalfblock: + vld1.8 {d1}, [r1, :64] + veor d0, d0, d1 + vst1.8 {d0}, [r0, :64] + pop {r4-r6, pc} + +.Lctrcarry: + .irp sreg, s26, s25, s24 + vmov ip, \sreg @ load next word of ctr + rev ip, ip @ ... to handle the carry + adds ip, ip, #1 + rev ip, ip + vmov \sreg, ip + bcc 0f + .endr +0: teq r4, #0 + beq .Lctrout + b .Lctrloop +ENDPROC(ce_aes_ctr_encrypt) + + /* + * aes_xts_encrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds, + * int blocks, u8 iv[], u8 const rk2[], int first) + * aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds, + * int blocks, u8 iv[], u8 const rk2[], int first) + */ + + .macro next_tweak, out, in, const, tmp + vshr.s64 \tmp, \in, #63 + vand \tmp, \tmp, \const + vadd.u64 \out, \in, \in + vext.8 \tmp, \tmp, \tmp, #8 + veor \out, \out, \tmp + .endm + + .align 3 +.Lxts_mul_x: + .quad 1, 0x87 + +ce_aes_xts_init: + vldr d14, .Lxts_mul_x + vldr d15, .Lxts_mul_x + 8 + + ldrd r4, r5, [sp, #16] @ load args + ldr r6, [sp, #28] + vld1.8 {q0}, [r5] @ load iv + teq r6, #1 @ start of a block? + bxne lr + + @ Encrypt the IV in q0 with the second AES key. This should only + @ be done at the start of a block. + ldr r6, [sp, #24] @ load AES key 2 + prepare_key r6, r3 + add ip, r6, #32 @ 3rd round key of key 2 + b .Laes_encrypt_tweak @ tail call +ENDPROC(ce_aes_xts_init) + +ENTRY(ce_aes_xts_encrypt) + push {r4-r6, lr} + + bl ce_aes_xts_init @ run shared prologue + prepare_key r2, r3 + vmov q3, q0 + + teq r6, #0 @ start of a block? + bne .Lxtsenc3x + +.Lxtsencloop3x: + next_tweak q3, q3, q7, q6 +.Lxtsenc3x: + subs r4, r4, #3 + bmi .Lxtsenc1x + vld1.8 {q0-q1}, [r1, :64]! @ get 3 pt blocks + vld1.8 {q2}, [r1, :64]! + next_tweak q4, q3, q7, q6 + veor q0, q0, q3 + next_tweak q5, q4, q7, q6 + veor q1, q1, q4 + veor q2, q2, q5 + bl aes_encrypt_3x + veor q0, q0, q3 + veor q1, q1, q4 + veor q2, q2, q5 + vst1.8 {q0-q1}, [r0, :64]! @ write 3 ct blocks + vst1.8 {q2}, [r0, :64]! + vmov q3, q5 + teq r4, #0 + beq .Lxtsencout + b .Lxtsencloop3x +.Lxtsenc1x: + adds r4, r4, #3 + beq .Lxtsencout +.Lxtsencloop: + vld1.8 {q0}, [r1, :64]! + veor q0, q0, q3 + bl aes_encrypt + veor q0, q0, q3 + vst1.8 {q0}, [r0, :64]! + subs r4, r4, #1 + beq .Lxtsencout + next_tweak q3, q3, q7, q6 + b .Lxtsencloop +.Lxtsencout: + vst1.8 {q3}, [r5] + pop {r4-r6, pc} +ENDPROC(ce_aes_xts_encrypt) + + +ENTRY(ce_aes_xts_decrypt) + push {r4-r6, lr} + + bl ce_aes_xts_init @ run shared prologue + prepare_key r2, r3 + vmov q3, q0 + + teq r6, #0 @ start of a block? + bne .Lxtsdec3x + +.Lxtsdecloop3x: + next_tweak q3, q3, q7, q6 +.Lxtsdec3x: + subs r4, r4, #3 + bmi .Lxtsdec1x + vld1.8 {q0-q1}, [r1, :64]! @ get 3 ct blocks + vld1.8 {q2}, [r1, :64]! + next_tweak q4, q3, q7, q6 + veor q0, q0, q3 + next_tweak q5, q4, q7, q6 + veor q1, q1, q4 + veor q2, q2, q5 + bl aes_decrypt_3x + veor q0, q0, q3 + veor q1, q1, q4 + veor q2, q2, q5 + vst1.8 {q0-q1}, [r0, :64]! @ write 3 pt blocks + vst1.8 {q2}, [r0, :64]! + vmov q3, q5 + teq r4, #0 + beq .Lxtsdecout + b .Lxtsdecloop3x +.Lxtsdec1x: + adds r4, r4, #3 + beq .Lxtsdecout +.Lxtsdecloop: + vld1.8 {q0}, [r1, :64]! + veor q0, q0, q3 + add ip, r2, #32 @ 3rd round key + bl aes_decrypt + veor q0, q0, q3 + vst1.8 {q0}, [r0, :64]! + subs r4, r4, #1 + beq .Lxtsdecout + next_tweak q3, q3, q7, q6 + b .Lxtsdecloop +.Lxtsdecout: + vst1.8 {q3}, [r5] + pop {r4-r6, pc} +ENDPROC(ce_aes_xts_decrypt) + + /* + * u32 ce_aes_sub(u32 input) - use the aese instruction to perform the + * AES sbox substitution on each byte in + * 'input' + */ +ENTRY(ce_aes_sub) + vdup.32 q1, r0 + veor q0, q0, q0 + aese.8 q0, q1 + vmov r0, s0 + bx lr +ENDPROC(ce_aes_sub) + + /* + * void ce_aes_invert(u8 *dst, u8 *src) - perform the Inverse MixColumns + * operation on round key *src + */ +ENTRY(ce_aes_invert) + vld1.8 {q0}, [r1] + aesimc.8 q0, q0 + vst1.8 {q0}, [r0] + bx lr +ENDPROC(ce_aes_invert) |