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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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d7866e503b
Current minimum required version of binutils is 2.23, which supports PSHUFB, PCLMULQDQ, PEXTRD, AESKEYGENASSIST, AESIMC, AESENC, AESENCLAST, AESDEC, AESDECLAST and MOVQ instruction mnemonics. Substitute macros from include/asm/inst.h with a proper instruction mnemonics in various assmbly files from x86/crypto directory, and remove now unneeded file. The patch was tested by calculating and comparing sha256sum hashes of stripped object files before and after the patch, to be sure that executable code didn't change. Signed-off-by: Uros Bizjak <ubizjak@gmail.com> CC: Herbert Xu <herbert@gondor.apana.org.au> CC: "David S. Miller" <davem@davemloft.net> CC: Thomas Gleixner <tglx@linutronix.de> CC: Ingo Molnar <mingo@redhat.com> CC: Borislav Petkov <bp@alien8.de> CC: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
132 lines
2.7 KiB
ArmAsm
132 lines
2.7 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Accelerated GHASH implementation with Intel PCLMULQDQ-NI
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* instructions. This file contains accelerated part of ghash
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* implementation. More information about PCLMULQDQ can be found at:
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*
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* http://software.intel.com/en-us/articles/carry-less-multiplication-and-its-usage-for-computing-the-gcm-mode/
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*
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* Copyright (c) 2009 Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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* Vinodh Gopal
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* Erdinc Ozturk
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* Deniz Karakoyunlu
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*/
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#include <linux/linkage.h>
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#include <asm/frame.h>
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.section .rodata.cst16.bswap_mask, "aM", @progbits, 16
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.align 16
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.Lbswap_mask:
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.octa 0x000102030405060708090a0b0c0d0e0f
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#define DATA %xmm0
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#define SHASH %xmm1
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#define T1 %xmm2
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#define T2 %xmm3
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#define T3 %xmm4
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#define BSWAP %xmm5
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#define IN1 %xmm6
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.text
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/*
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* __clmul_gf128mul_ble: internal ABI
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* input:
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* DATA: operand1
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* SHASH: operand2, hash_key << 1 mod poly
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* output:
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* DATA: operand1 * operand2 mod poly
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* changed:
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* T1
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* T2
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* T3
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*/
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SYM_FUNC_START_LOCAL(__clmul_gf128mul_ble)
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movaps DATA, T1
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pshufd $0b01001110, DATA, T2
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pshufd $0b01001110, SHASH, T3
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pxor DATA, T2
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pxor SHASH, T3
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pclmulqdq $0x00, SHASH, DATA # DATA = a0 * b0
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pclmulqdq $0x11, SHASH, T1 # T1 = a1 * b1
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pclmulqdq $0x00, T3, T2 # T2 = (a1 + a0) * (b1 + b0)
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pxor DATA, T2
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pxor T1, T2 # T2 = a0 * b1 + a1 * b0
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movaps T2, T3
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pslldq $8, T3
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psrldq $8, T2
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pxor T3, DATA
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pxor T2, T1 # <T1:DATA> is result of
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# carry-less multiplication
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# first phase of the reduction
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movaps DATA, T3
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psllq $1, T3
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pxor DATA, T3
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psllq $5, T3
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pxor DATA, T3
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psllq $57, T3
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movaps T3, T2
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pslldq $8, T2
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psrldq $8, T3
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pxor T2, DATA
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pxor T3, T1
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# second phase of the reduction
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movaps DATA, T2
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psrlq $5, T2
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pxor DATA, T2
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psrlq $1, T2
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pxor DATA, T2
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psrlq $1, T2
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pxor T2, T1
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pxor T1, DATA
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ret
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SYM_FUNC_END(__clmul_gf128mul_ble)
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/* void clmul_ghash_mul(char *dst, const u128 *shash) */
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SYM_FUNC_START(clmul_ghash_mul)
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FRAME_BEGIN
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movups (%rdi), DATA
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movups (%rsi), SHASH
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movaps .Lbswap_mask, BSWAP
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pshufb BSWAP, DATA
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call __clmul_gf128mul_ble
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pshufb BSWAP, DATA
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movups DATA, (%rdi)
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FRAME_END
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ret
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SYM_FUNC_END(clmul_ghash_mul)
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/*
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* void clmul_ghash_update(char *dst, const char *src, unsigned int srclen,
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* const u128 *shash);
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*/
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SYM_FUNC_START(clmul_ghash_update)
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FRAME_BEGIN
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cmp $16, %rdx
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jb .Lupdate_just_ret # check length
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movaps .Lbswap_mask, BSWAP
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movups (%rdi), DATA
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movups (%rcx), SHASH
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pshufb BSWAP, DATA
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.align 4
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.Lupdate_loop:
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movups (%rsi), IN1
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pshufb BSWAP, IN1
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pxor IN1, DATA
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call __clmul_gf128mul_ble
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sub $16, %rdx
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add $16, %rsi
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cmp $16, %rdx
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jge .Lupdate_loop
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pshufb BSWAP, DATA
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movups DATA, (%rdi)
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.Lupdate_just_ret:
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FRAME_END
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ret
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SYM_FUNC_END(clmul_ghash_update)
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