mirror of
https://github.com/torvalds/linux
synced 2024-09-21 19:47:35 +00:00
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>
241 lines
6 KiB
ArmAsm
241 lines
6 KiB
ArmAsm
/* GPL HEADER START
|
|
*
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 only,
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License version 2 for more details (a copy is included
|
|
* in the LICENSE file that accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* version 2 along with this program; If not, see http://www.gnu.org/licenses
|
|
*
|
|
* Please visit http://www.xyratex.com/contact if you need additional
|
|
* information or have any questions.
|
|
*
|
|
* GPL HEADER END
|
|
*/
|
|
|
|
/*
|
|
* Copyright 2012 Xyratex Technology Limited
|
|
*
|
|
* Using hardware provided PCLMULQDQ instruction to accelerate the CRC32
|
|
* calculation.
|
|
* CRC32 polynomial:0x04c11db7(BE)/0xEDB88320(LE)
|
|
* PCLMULQDQ is a new instruction in Intel SSE4.2, the reference can be found
|
|
* at:
|
|
* http://www.intel.com/products/processor/manuals/
|
|
* Intel(R) 64 and IA-32 Architectures Software Developer's Manual
|
|
* Volume 2B: Instruction Set Reference, N-Z
|
|
*
|
|
* Authors: Gregory Prestas <Gregory_Prestas@us.xyratex.com>
|
|
* Alexander Boyko <Alexander_Boyko@xyratex.com>
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
|
|
.section .rodata
|
|
.align 16
|
|
/*
|
|
* [x4*128+32 mod P(x) << 32)]' << 1 = 0x154442bd4
|
|
* #define CONSTANT_R1 0x154442bd4LL
|
|
*
|
|
* [(x4*128-32 mod P(x) << 32)]' << 1 = 0x1c6e41596
|
|
* #define CONSTANT_R2 0x1c6e41596LL
|
|
*/
|
|
.Lconstant_R2R1:
|
|
.octa 0x00000001c6e415960000000154442bd4
|
|
/*
|
|
* [(x128+32 mod P(x) << 32)]' << 1 = 0x1751997d0
|
|
* #define CONSTANT_R3 0x1751997d0LL
|
|
*
|
|
* [(x128-32 mod P(x) << 32)]' << 1 = 0x0ccaa009e
|
|
* #define CONSTANT_R4 0x0ccaa009eLL
|
|
*/
|
|
.Lconstant_R4R3:
|
|
.octa 0x00000000ccaa009e00000001751997d0
|
|
/*
|
|
* [(x64 mod P(x) << 32)]' << 1 = 0x163cd6124
|
|
* #define CONSTANT_R5 0x163cd6124LL
|
|
*/
|
|
.Lconstant_R5:
|
|
.octa 0x00000000000000000000000163cd6124
|
|
.Lconstant_mask32:
|
|
.octa 0x000000000000000000000000FFFFFFFF
|
|
/*
|
|
* #define CRCPOLY_TRUE_LE_FULL 0x1DB710641LL
|
|
*
|
|
* Barrett Reduction constant (u64`) = u` = (x**64 / P(x))` = 0x1F7011641LL
|
|
* #define CONSTANT_RU 0x1F7011641LL
|
|
*/
|
|
.Lconstant_RUpoly:
|
|
.octa 0x00000001F701164100000001DB710641
|
|
|
|
#define CONSTANT %xmm0
|
|
|
|
#ifdef __x86_64__
|
|
#define BUF %rdi
|
|
#define LEN %rsi
|
|
#define CRC %edx
|
|
#else
|
|
#define BUF %eax
|
|
#define LEN %edx
|
|
#define CRC %ecx
|
|
#endif
|
|
|
|
|
|
|
|
.text
|
|
/**
|
|
* Calculate crc32
|
|
* BUF - buffer (16 bytes aligned)
|
|
* LEN - sizeof buffer (16 bytes aligned), LEN should be grater than 63
|
|
* CRC - initial crc32
|
|
* return %eax crc32
|
|
* uint crc32_pclmul_le_16(unsigned char const *buffer,
|
|
* size_t len, uint crc32)
|
|
*/
|
|
|
|
SYM_FUNC_START(crc32_pclmul_le_16) /* buffer and buffer size are 16 bytes aligned */
|
|
movdqa (BUF), %xmm1
|
|
movdqa 0x10(BUF), %xmm2
|
|
movdqa 0x20(BUF), %xmm3
|
|
movdqa 0x30(BUF), %xmm4
|
|
movd CRC, CONSTANT
|
|
pxor CONSTANT, %xmm1
|
|
sub $0x40, LEN
|
|
add $0x40, BUF
|
|
cmp $0x40, LEN
|
|
jb less_64
|
|
|
|
#ifdef __x86_64__
|
|
movdqa .Lconstant_R2R1(%rip), CONSTANT
|
|
#else
|
|
movdqa .Lconstant_R2R1, CONSTANT
|
|
#endif
|
|
|
|
loop_64:/* 64 bytes Full cache line folding */
|
|
prefetchnta 0x40(BUF)
|
|
movdqa %xmm1, %xmm5
|
|
movdqa %xmm2, %xmm6
|
|
movdqa %xmm3, %xmm7
|
|
#ifdef __x86_64__
|
|
movdqa %xmm4, %xmm8
|
|
#endif
|
|
pclmulqdq $0x00, CONSTANT, %xmm1
|
|
pclmulqdq $0x00, CONSTANT, %xmm2
|
|
pclmulqdq $0x00, CONSTANT, %xmm3
|
|
#ifdef __x86_64__
|
|
pclmulqdq $0x00, CONSTANT, %xmm4
|
|
#endif
|
|
pclmulqdq $0x11, CONSTANT, %xmm5
|
|
pclmulqdq $0x11, CONSTANT, %xmm6
|
|
pclmulqdq $0x11, CONSTANT, %xmm7
|
|
#ifdef __x86_64__
|
|
pclmulqdq $0x11, CONSTANT, %xmm8
|
|
#endif
|
|
pxor %xmm5, %xmm1
|
|
pxor %xmm6, %xmm2
|
|
pxor %xmm7, %xmm3
|
|
#ifdef __x86_64__
|
|
pxor %xmm8, %xmm4
|
|
#else
|
|
/* xmm8 unsupported for x32 */
|
|
movdqa %xmm4, %xmm5
|
|
pclmulqdq $0x00, CONSTANT, %xmm4
|
|
pclmulqdq $0x11, CONSTANT, %xmm5
|
|
pxor %xmm5, %xmm4
|
|
#endif
|
|
|
|
pxor (BUF), %xmm1
|
|
pxor 0x10(BUF), %xmm2
|
|
pxor 0x20(BUF), %xmm3
|
|
pxor 0x30(BUF), %xmm4
|
|
|
|
sub $0x40, LEN
|
|
add $0x40, BUF
|
|
cmp $0x40, LEN
|
|
jge loop_64
|
|
less_64:/* Folding cache line into 128bit */
|
|
#ifdef __x86_64__
|
|
movdqa .Lconstant_R4R3(%rip), CONSTANT
|
|
#else
|
|
movdqa .Lconstant_R4R3, CONSTANT
|
|
#endif
|
|
prefetchnta (BUF)
|
|
|
|
movdqa %xmm1, %xmm5
|
|
pclmulqdq $0x00, CONSTANT, %xmm1
|
|
pclmulqdq $0x11, CONSTANT, %xmm5
|
|
pxor %xmm5, %xmm1
|
|
pxor %xmm2, %xmm1
|
|
|
|
movdqa %xmm1, %xmm5
|
|
pclmulqdq $0x00, CONSTANT, %xmm1
|
|
pclmulqdq $0x11, CONSTANT, %xmm5
|
|
pxor %xmm5, %xmm1
|
|
pxor %xmm3, %xmm1
|
|
|
|
movdqa %xmm1, %xmm5
|
|
pclmulqdq $0x00, CONSTANT, %xmm1
|
|
pclmulqdq $0x11, CONSTANT, %xmm5
|
|
pxor %xmm5, %xmm1
|
|
pxor %xmm4, %xmm1
|
|
|
|
cmp $0x10, LEN
|
|
jb fold_64
|
|
loop_16:/* Folding rest buffer into 128bit */
|
|
movdqa %xmm1, %xmm5
|
|
pclmulqdq $0x00, CONSTANT, %xmm1
|
|
pclmulqdq $0x11, CONSTANT, %xmm5
|
|
pxor %xmm5, %xmm1
|
|
pxor (BUF), %xmm1
|
|
sub $0x10, LEN
|
|
add $0x10, BUF
|
|
cmp $0x10, LEN
|
|
jge loop_16
|
|
|
|
fold_64:
|
|
/* perform the last 64 bit fold, also adds 32 zeroes
|
|
* to the input stream */
|
|
pclmulqdq $0x01, %xmm1, CONSTANT /* R4 * xmm1.low */
|
|
psrldq $0x08, %xmm1
|
|
pxor CONSTANT, %xmm1
|
|
|
|
/* final 32-bit fold */
|
|
movdqa %xmm1, %xmm2
|
|
#ifdef __x86_64__
|
|
movdqa .Lconstant_R5(%rip), CONSTANT
|
|
movdqa .Lconstant_mask32(%rip), %xmm3
|
|
#else
|
|
movdqa .Lconstant_R5, CONSTANT
|
|
movdqa .Lconstant_mask32, %xmm3
|
|
#endif
|
|
psrldq $0x04, %xmm2
|
|
pand %xmm3, %xmm1
|
|
pclmulqdq $0x00, CONSTANT, %xmm1
|
|
pxor %xmm2, %xmm1
|
|
|
|
/* Finish up with the bit-reversed barrett reduction 64 ==> 32 bits */
|
|
#ifdef __x86_64__
|
|
movdqa .Lconstant_RUpoly(%rip), CONSTANT
|
|
#else
|
|
movdqa .Lconstant_RUpoly, CONSTANT
|
|
#endif
|
|
movdqa %xmm1, %xmm2
|
|
pand %xmm3, %xmm1
|
|
pclmulqdq $0x10, CONSTANT, %xmm1
|
|
pand %xmm3, %xmm1
|
|
pclmulqdq $0x00, CONSTANT, %xmm1
|
|
pxor %xmm2, %xmm1
|
|
pextrd $0x01, %xmm1, %eax
|
|
|
|
ret
|
|
SYM_FUNC_END(crc32_pclmul_le_16)
|