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e99ce921c4
Add support for the SM4 symmetric cipher implemented using the special SM4 instructions introduced in ARM architecture revision 8.2. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
37 lines
743 B
ArmAsm
37 lines
743 B
ArmAsm
// SPDX-License-Identifier: GPL-2.0
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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
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.set .Lv\b\().4s, \b
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.endr
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.macro sm4e, rd, rn
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.inst 0xcec08400 | .L\rd | (.L\rn << 5)
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.endm
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/*
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* void sm4_ce_do_crypt(const u32 *rk, u32 *out, const u32 *in);
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*/
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.text
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ENTRY(sm4_ce_do_crypt)
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ld1 {v8.4s}, [x2]
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ld1 {v0.4s-v3.4s}, [x0], #64
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CPU_LE( rev32 v8.16b, v8.16b )
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ld1 {v4.4s-v7.4s}, [x0]
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sm4e v8.4s, v0.4s
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sm4e v8.4s, v1.4s
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sm4e v8.4s, v2.4s
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sm4e v8.4s, v3.4s
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sm4e v8.4s, v4.4s
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sm4e v8.4s, v5.4s
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sm4e v8.4s, v6.4s
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sm4e v8.4s, v7.4s
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rev64 v8.4s, v8.4s
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ext v8.16b, v8.16b, v8.16b, #8
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CPU_LE( rev32 v8.16b, v8.16b )
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st1 {v8.4s}, [x1]
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ret
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ENDPROC(sm4_ce_do_crypt)
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