summaryrefslogtreecommitdiff
path: root/arch/arm/lib
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/lib')
-rw-r--r--arch/arm/lib/.gitignore4
-rw-r--r--arch/arm/lib/Makefile6
-rw-r--r--arch/arm/lib/crc-t10dif-core.S468
-rw-r--r--arch/arm/lib/crc-t10dif-glue.c72
-rw-r--r--arch/arm/lib/crc32-core.S306
-rw-r--r--arch/arm/lib/crc32-glue.c123
6 files changed, 4 insertions, 975 deletions
diff --git a/arch/arm/lib/.gitignore b/arch/arm/lib/.gitignore
new file mode 100644
index 000000000000..647d7a922e68
--- /dev/null
+++ b/arch/arm/lib/.gitignore
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+# This now-removed directory used to contain generated files.
+/crypto/
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 007874320937..0ca5aae1bcc3 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -45,9 +45,3 @@ ifeq ($(CONFIG_KERNEL_MODE_NEON),y)
endif
obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o
-
-obj-$(CONFIG_CRC32_ARCH) += crc32-arm.o
-crc32-arm-y := crc32-glue.o crc32-core.o
-
-obj-$(CONFIG_CRC_T10DIF_ARCH) += crc-t10dif-arm.o
-crc-t10dif-arm-y := crc-t10dif-glue.o crc-t10dif-core.o
diff --git a/arch/arm/lib/crc-t10dif-core.S b/arch/arm/lib/crc-t10dif-core.S
deleted file mode 100644
index 2bbf2df9c1e2..000000000000
--- a/arch/arm/lib/crc-t10dif-core.S
+++ /dev/null
@@ -1,468 +0,0 @@
-//
-// Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions instructions
-//
-// Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org>
-// Copyright (C) 2019 Google LLC <ebiggers@google.com>
-//
-// 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.
-//
-
-// Derived from the x86 version:
-//
-// Implement fast CRC-T10DIF computation with SSE and PCLMULQDQ instructions
-//
-// Copyright (c) 2013, Intel Corporation
-//
-// Authors:
-// Erdinc Ozturk <erdinc.ozturk@intel.com>
-// Vinodh Gopal <vinodh.gopal@intel.com>
-// James Guilford <james.guilford@intel.com>
-// Tim Chen <tim.c.chen@linux.intel.com>
-//
-// This software is available to you under a choice of one of two
-// licenses. You may choose to be licensed under the terms of the GNU
-// General Public License (GPL) Version 2, available from the file
-// COPYING in the main directory of this source tree, or the
-// OpenIB.org BSD license below:
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//
-// * Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the
-// distribution.
-//
-// * Neither the name of the Intel Corporation nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-//
-// THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION ""AS IS"" AND ANY
-// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR
-// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Reference paper titled "Fast CRC Computation for Generic
-// Polynomials Using PCLMULQDQ Instruction"
-// URL: http://www.intel.com/content/dam/www/public/us/en/documents
-// /white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf
-//
-
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-
-#ifdef CONFIG_CPU_ENDIAN_BE8
-#define CPU_LE(code...)
-#else
-#define CPU_LE(code...) code
-#endif
-
- .text
- .arch armv8-a
- .fpu crypto-neon-fp-armv8
-
- init_crc .req r0
- buf .req r1
- len .req r2
-
- fold_consts_ptr .req ip
-
- q0l .req d0
- q0h .req d1
- q1l .req d2
- q1h .req d3
- q2l .req d4
- q2h .req d5
- q3l .req d6
- q3h .req d7
- q4l .req d8
- q4h .req d9
- q5l .req d10
- q5h .req d11
- q6l .req d12
- q6h .req d13
- q7l .req d14
- q7h .req d15
- q8l .req d16
- q8h .req d17
- q9l .req d18
- q9h .req d19
- q10l .req d20
- q10h .req d21
- q11l .req d22
- q11h .req d23
- q12l .req d24
- q12h .req d25
-
- FOLD_CONSTS .req q10
- FOLD_CONST_L .req q10l
- FOLD_CONST_H .req q10h
-
- /*
- * Pairwise long polynomial multiplication of two 16-bit values
- *
- * { w0, w1 }, { y0, y1 }
- *
- * by two 64-bit values
- *
- * { x0, x1, x2, x3, x4, x5, x6, x7 }, { z0, z1, z2, z3, z4, z5, z6, z7 }
- *
- * where each vector element is a byte, ordered from least to most
- * significant. The resulting 80-bit vectors are XOR'ed together.
- *
- * This can be implemented using 8x8 long polynomial multiplication, by
- * reorganizing the input so that each pairwise 8x8 multiplication
- * produces one of the terms from the decomposition below, and
- * combining the results of each rank and shifting them into place.
- *
- * Rank
- * 0 w0*x0 ^ | y0*z0 ^
- * 1 (w0*x1 ^ w1*x0) << 8 ^ | (y0*z1 ^ y1*z0) << 8 ^
- * 2 (w0*x2 ^ w1*x1) << 16 ^ | (y0*z2 ^ y1*z1) << 16 ^
- * 3 (w0*x3 ^ w1*x2) << 24 ^ | (y0*z3 ^ y1*z2) << 24 ^
- * 4 (w0*x4 ^ w1*x3) << 32 ^ | (y0*z4 ^ y1*z3) << 32 ^
- * 5 (w0*x5 ^ w1*x4) << 40 ^ | (y0*z5 ^ y1*z4) << 40 ^
- * 6 (w0*x6 ^ w1*x5) << 48 ^ | (y0*z6 ^ y1*z5) << 48 ^
- * 7 (w0*x7 ^ w1*x6) << 56 ^ | (y0*z7 ^ y1*z6) << 56 ^
- * 8 w1*x7 << 64 | y1*z7 << 64
- *
- * The inputs can be reorganized into
- *
- * { w0, w0, w0, w0, y0, y0, y0, y0 }, { w1, w1, w1, w1, y1, y1, y1, y1 }
- * { x0, x2, x4, x6, z0, z2, z4, z6 }, { x1, x3, x5, x7, z1, z3, z5, z7 }
- *
- * and after performing 8x8->16 bit long polynomial multiplication of
- * each of the halves of the first vector with those of the second one,
- * we obtain the following four vectors of 16-bit elements:
- *
- * a := { w0*x0, w0*x2, w0*x4, w0*x6 }, { y0*z0, y0*z2, y0*z4, y0*z6 }
- * b := { w0*x1, w0*x3, w0*x5, w0*x7 }, { y0*z1, y0*z3, y0*z5, y0*z7 }
- * c := { w1*x0, w1*x2, w1*x4, w1*x6 }, { y1*z0, y1*z2, y1*z4, y1*z6 }
- * d := { w1*x1, w1*x3, w1*x5, w1*x7 }, { y1*z1, y1*z3, y1*z5, y1*z7 }
- *
- * Results b and c can be XORed together, as the vector elements have
- * matching ranks. Then, the final XOR can be pulled forward, and
- * applied between the halves of each of the remaining three vectors,
- * which are then shifted into place, and XORed together to produce the
- * final 80-bit result.
- */
- .macro pmull16x64_p8, v16, v64
- vext.8 q11, \v64, \v64, #1
- vld1.64 {q12}, [r4, :128]
- vuzp.8 q11, \v64
- vtbl.8 d24, {\v16\()_L-\v16\()_H}, d24
- vtbl.8 d25, {\v16\()_L-\v16\()_H}, d25
- bl __pmull16x64_p8
- veor \v64, q12, q14
- .endm
-
-__pmull16x64_p8:
- vmull.p8 q13, d23, d24
- vmull.p8 q14, d23, d25
- vmull.p8 q15, d22, d24
- vmull.p8 q12, d22, d25
-
- veor q14, q14, q15
- veor d24, d24, d25
- veor d26, d26, d27
- veor d28, d28, d29
- vmov.i32 d25, #0
- vmov.i32 d29, #0
- vext.8 q12, q12, q12, #14
- vext.8 q14, q14, q14, #15
- veor d24, d24, d26
- bx lr
-ENDPROC(__pmull16x64_p8)
-
- .macro pmull16x64_p64, v16, v64
- vmull.p64 q11, \v64\()l, \v16\()_L
- vmull.p64 \v64, \v64\()h, \v16\()_H
- veor \v64, \v64, q11
- .endm
-
- // Fold reg1, reg2 into the next 32 data bytes, storing the result back
- // into reg1, reg2.
- .macro fold_32_bytes, reg1, reg2, p
- vld1.64 {q8-q9}, [buf]!
-
- pmull16x64_\p FOLD_CONST, \reg1
- pmull16x64_\p FOLD_CONST, \reg2
-
-CPU_LE( vrev64.8 q8, q8 )
-CPU_LE( vrev64.8 q9, q9 )
- vswp q8l, q8h
- vswp q9l, q9h
-
- veor.8 \reg1, \reg1, q8
- veor.8 \reg2, \reg2, q9
- .endm
-
- // Fold src_reg into dst_reg, optionally loading the next fold constants
- .macro fold_16_bytes, src_reg, dst_reg, p, load_next_consts
- pmull16x64_\p FOLD_CONST, \src_reg
- .ifnb \load_next_consts
- vld1.64 {FOLD_CONSTS}, [fold_consts_ptr, :128]!
- .endif
- veor.8 \dst_reg, \dst_reg, \src_reg
- .endm
-
- .macro crct10dif, p
- // For sizes less than 256 bytes, we can't fold 128 bytes at a time.
- cmp len, #256
- blt .Lless_than_256_bytes\@
-
- mov_l fold_consts_ptr, .Lfold_across_128_bytes_consts
-
- // Load the first 128 data bytes. Byte swapping is necessary to make
- // the bit order match the polynomial coefficient order.
- vld1.64 {q0-q1}, [buf]!
- vld1.64 {q2-q3}, [buf]!
- vld1.64 {q4-q5}, [buf]!
- vld1.64 {q6-q7}, [buf]!
-CPU_LE( vrev64.8 q0, q0 )
-CPU_LE( vrev64.8 q1, q1 )
-CPU_LE( vrev64.8 q2, q2 )
-CPU_LE( vrev64.8 q3, q3 )
-CPU_LE( vrev64.8 q4, q4 )
-CPU_LE( vrev64.8 q5, q5 )
-CPU_LE( vrev64.8 q6, q6 )
-CPU_LE( vrev64.8 q7, q7 )
- vswp q0l, q0h
- vswp q1l, q1h
- vswp q2l, q2h
- vswp q3l, q3h
- vswp q4l, q4h
- vswp q5l, q5h
- vswp q6l, q6h
- vswp q7l, q7h
-
- // XOR the first 16 data *bits* with the initial CRC value.
- vmov.i8 q8h, #0
- vmov.u16 q8h[3], init_crc
- veor q0h, q0h, q8h
-
- // Load the constants for folding across 128 bytes.
- vld1.64 {FOLD_CONSTS}, [fold_consts_ptr, :128]!
-
- // Subtract 128 for the 128 data bytes just consumed. Subtract another
- // 128 to simplify the termination condition of the following loop.
- sub len, len, #256
-
- // While >= 128 data bytes remain (not counting q0-q7), fold the 128
- // bytes q0-q7 into them, storing the result back into q0-q7.
-.Lfold_128_bytes_loop\@:
- fold_32_bytes q0, q1, \p
- fold_32_bytes q2, q3, \p
- fold_32_bytes q4, q5, \p
- fold_32_bytes q6, q7, \p
- subs len, len, #128
- bge .Lfold_128_bytes_loop\@
-
- // Now fold the 112 bytes in q0-q6 into the 16 bytes in q7.
-
- // Fold across 64 bytes.
- vld1.64 {FOLD_CONSTS}, [fold_consts_ptr, :128]!
- fold_16_bytes q0, q4, \p
- fold_16_bytes q1, q5, \p
- fold_16_bytes q2, q6, \p
- fold_16_bytes q3, q7, \p, 1
- // Fold across 32 bytes.
- fold_16_bytes q4, q6, \p
- fold_16_bytes q5, q7, \p, 1
- // Fold across 16 bytes.
- fold_16_bytes q6, q7, \p
-
- // Add 128 to get the correct number of data bytes remaining in 0...127
- // (not counting q7), following the previous extra subtraction by 128.
- // Then subtract 16 to simplify the termination condition of the
- // following loop.
- adds len, len, #(128-16)
-
- // While >= 16 data bytes remain (not counting q7), fold the 16 bytes q7
- // into them, storing the result back into q7.
- blt .Lfold_16_bytes_loop_done\@
-.Lfold_16_bytes_loop\@:
- pmull16x64_\p FOLD_CONST, q7
- vld1.64 {q0}, [buf]!
-CPU_LE( vrev64.8 q0, q0 )
- vswp q0l, q0h
- veor.8 q7, q7, q0
- subs len, len, #16
- bge .Lfold_16_bytes_loop\@
-
-.Lfold_16_bytes_loop_done\@:
- // Add 16 to get the correct number of data bytes remaining in 0...15
- // (not counting q7), following the previous extra subtraction by 16.
- adds len, len, #16
- beq .Lreduce_final_16_bytes\@
-
-.Lhandle_partial_segment\@:
- // Reduce the last '16 + len' bytes where 1 <= len <= 15 and the first
- // 16 bytes are in q7 and the rest are the remaining data in 'buf'. To
- // do this without needing a fold constant for each possible 'len',
- // redivide the bytes into a first chunk of 'len' bytes and a second
- // chunk of 16 bytes, then fold the first chunk into the second.
-
- // q0 = last 16 original data bytes
- add buf, buf, len
- sub buf, buf, #16
- vld1.64 {q0}, [buf]
-CPU_LE( vrev64.8 q0, q0 )
- vswp q0l, q0h
-
- // q1 = high order part of second chunk: q7 left-shifted by 'len' bytes.
- mov_l r1, .Lbyteshift_table + 16
- sub r1, r1, len
- vld1.8 {q2}, [r1]
- vtbl.8 q1l, {q7l-q7h}, q2l
- vtbl.8 q1h, {q7l-q7h}, q2h
-
- // q3 = first chunk: q7 right-shifted by '16-len' bytes.
- vmov.i8 q3, #0x80
- veor.8 q2, q2, q3
- vtbl.8 q3l, {q7l-q7h}, q2l
- vtbl.8 q3h, {q7l-q7h}, q2h
-
- // Convert to 8-bit masks: 'len' 0x00 bytes, then '16-len' 0xff bytes.
- vshr.s8 q2, q2, #7
-
- // q2 = second chunk: 'len' bytes from q0 (low-order bytes),
- // then '16-len' bytes from q1 (high-order bytes).
- vbsl.8 q2, q1, q0
-
- // Fold the first chunk into the second chunk, storing the result in q7.
- pmull16x64_\p FOLD_CONST, q3
- veor.8 q7, q3, q2
- b .Lreduce_final_16_bytes\@
-
-.Lless_than_256_bytes\@:
- // Checksumming a buffer of length 16...255 bytes
-
- mov_l fold_consts_ptr, .Lfold_across_16_bytes_consts
-
- // Load the first 16 data bytes.
- vld1.64 {q7}, [buf]!
-CPU_LE( vrev64.8 q7, q7 )
- vswp q7l, q7h
-
- // XOR the first 16 data *bits* with the initial CRC value.
- vmov.i8 q0h, #0
- vmov.u16 q0h[3], init_crc
- veor.8 q7h, q7h, q0h
-
- // Load the fold-across-16-bytes constants.
- vld1.64 {FOLD_CONSTS}, [fold_consts_ptr, :128]!
-
- cmp len, #16
- beq .Lreduce_final_16_bytes\@ // len == 16
- subs len, len, #32
- addlt len, len, #16
- blt .Lhandle_partial_segment\@ // 17 <= len <= 31
- b .Lfold_16_bytes_loop\@ // 32 <= len <= 255
-
-.Lreduce_final_16_bytes\@:
- .endm
-
-//
-// u16 crc_t10dif_pmull(u16 init_crc, const u8 *buf, size_t len);
-//
-// Assumes len >= 16.
-//
-ENTRY(crc_t10dif_pmull64)
- crct10dif p64
-
- // Reduce the 128-bit value M(x), stored in q7, to the final 16-bit CRC.
-
- // Load 'x^48 * (x^48 mod G(x))' and 'x^48 * (x^80 mod G(x))'.
- vld1.64 {FOLD_CONSTS}, [fold_consts_ptr, :128]!
-
- // Fold the high 64 bits into the low 64 bits, while also multiplying by
- // x^64. This produces a 128-bit value congruent to x^64 * M(x) and
- // whose low 48 bits are 0.
- vmull.p64 q0, q7h, FOLD_CONST_H // high bits * x^48 * (x^80 mod G(x))
- veor.8 q0h, q0h, q7l // + low bits * x^64
-
- // Fold the high 32 bits into the low 96 bits. This produces a 96-bit
- // value congruent to x^64 * M(x) and whose low 48 bits are 0.
- vmov.i8 q1, #0
- vmov s4, s3 // extract high 32 bits
- vmov s3, s5 // zero high 32 bits
- vmull.p64 q1, q1l, FOLD_CONST_L // high 32 bits * x^48 * (x^48 mod G(x))
- veor.8 q0, q0, q1 // + low bits
-
- // Load G(x) and floor(x^48 / G(x)).
- vld1.64 {FOLD_CONSTS}, [fold_consts_ptr, :128]
-
- // Use Barrett reduction to compute the final CRC value.
- vmull.p64 q1, q0h, FOLD_CONST_H // high 32 bits * floor(x^48 / G(x))
- vshr.u64 q1l, q1l, #32 // /= x^32
- vmull.p64 q1, q1l, FOLD_CONST_L // *= G(x)
- vshr.u64 q0l, q0l, #48
- veor.8 q0l, q0l, q1l // + low 16 nonzero bits
- // Final CRC value (x^16 * M(x)) mod G(x) is in low 16 bits of q0.
-
- vmov.u16 r0, q0l[0]
- bx lr
-ENDPROC(crc_t10dif_pmull64)
-
-ENTRY(crc_t10dif_pmull8)
- push {r4, lr}
- mov_l r4, .L16x64perm
-
- crct10dif p8
-
-CPU_LE( vrev64.8 q7, q7 )
- vswp q7l, q7h
- vst1.64 {q7}, [r3, :128]
- pop {r4, pc}
-ENDPROC(crc_t10dif_pmull8)
-
- .section ".rodata", "a"
- .align 4
-
-// Fold constants precomputed from the polynomial 0x18bb7
-// G(x) = x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x^1 + x^0
-.Lfold_across_128_bytes_consts:
- .quad 0x0000000000006123 // x^(8*128) mod G(x)
- .quad 0x0000000000002295 // x^(8*128+64) mod G(x)
-// .Lfold_across_64_bytes_consts:
- .quad 0x0000000000001069 // x^(4*128) mod G(x)
- .quad 0x000000000000dd31 // x^(4*128+64) mod G(x)
-// .Lfold_across_32_bytes_consts:
- .quad 0x000000000000857d // x^(2*128) mod G(x)
- .quad 0x0000000000007acc // x^(2*128+64) mod G(x)
-.Lfold_across_16_bytes_consts:
- .quad 0x000000000000a010 // x^(1*128) mod G(x)
- .quad 0x0000000000001faa // x^(1*128+64) mod G(x)
-// .Lfinal_fold_consts:
- .quad 0x1368000000000000 // x^48 * (x^48 mod G(x))
- .quad 0x2d56000000000000 // x^48 * (x^80 mod G(x))
-// .Lbarrett_reduction_consts:
- .quad 0x0000000000018bb7 // G(x)
- .quad 0x00000001f65a57f8 // floor(x^48 / G(x))
-
-// For 1 <= len <= 15, the 16-byte vector beginning at &byteshift_table[16 -
-// len] is the index vector to shift left by 'len' bytes, and is also {0x80,
-// ..., 0x80} XOR the index vector to shift right by '16 - len' bytes.
-.Lbyteshift_table:
- .byte 0x0, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87
- .byte 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f
- .byte 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7
- .byte 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe , 0x0
-
-.L16x64perm:
- .quad 0x808080800000000, 0x909090901010101
diff --git a/arch/arm/lib/crc-t10dif-glue.c b/arch/arm/lib/crc-t10dif-glue.c
deleted file mode 100644
index 6efad3d78284..000000000000
--- a/arch/arm/lib/crc-t10dif-glue.c
+++ /dev/null
@@ -1,72 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions instructions
- *
- * Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org>
- */
-
-#include <linux/crc-t10dif.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/string.h>
-
-#include <crypto/internal/simd.h>
-
-#include <asm/neon.h>
-#include <asm/simd.h>
-
-static DEFINE_STATIC_KEY_FALSE(have_neon);
-static DEFINE_STATIC_KEY_FALSE(have_pmull);
-
-#define CRC_T10DIF_PMULL_CHUNK_SIZE 16U
-
-asmlinkage u16 crc_t10dif_pmull64(u16 init_crc, const u8 *buf, size_t len);
-asmlinkage void crc_t10dif_pmull8(u16 init_crc, const u8 *buf, size_t len,
- u8 out[16]);
-
-u16 crc_t10dif_arch(u16 crc, const u8 *data, size_t length)
-{
- if (length >= CRC_T10DIF_PMULL_CHUNK_SIZE) {
- if (static_branch_likely(&have_pmull)) {
- if (crypto_simd_usable()) {
- kernel_neon_begin();
- crc = crc_t10dif_pmull64(crc, data, length);
- kernel_neon_end();
- return crc;
- }
- } else if (length > CRC_T10DIF_PMULL_CHUNK_SIZE &&
- static_branch_likely(&have_neon) &&
- crypto_simd_usable()) {
- u8 buf[16] __aligned(16);
-
- kernel_neon_begin();
- crc_t10dif_pmull8(crc, data, length, buf);
- kernel_neon_end();
-
- return crc_t10dif_generic(0, buf, sizeof(buf));
- }
- }
- return crc_t10dif_generic(crc, data, length);
-}
-EXPORT_SYMBOL(crc_t10dif_arch);
-
-static int __init crc_t10dif_arm_init(void)
-{
- if (elf_hwcap & HWCAP_NEON) {
- static_branch_enable(&have_neon);
- if (elf_hwcap2 & HWCAP2_PMULL)
- static_branch_enable(&have_pmull);
- }
- return 0;
-}
-arch_initcall(crc_t10dif_arm_init);
-
-static void __exit crc_t10dif_arm_exit(void)
-{
-}
-module_exit(crc_t10dif_arm_exit);
-
-MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
-MODULE_DESCRIPTION("Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions");
-MODULE_LICENSE("GPL v2");
diff --git a/arch/arm/lib/crc32-core.S b/arch/arm/lib/crc32-core.S
deleted file mode 100644
index 6f674f30c70b..000000000000
--- a/arch/arm/lib/crc32-core.S
+++ /dev/null
@@ -1,306 +0,0 @@
-/*
- * Accelerated CRC32(C) using ARM CRC, NEON and Crypto Extensions instructions
- *
- * Copyright (C) 2016 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.
- */
-
-/* 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:
- * https://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>
-#include <asm/assembler.h>
-
- .text
- .align 6
- .arch armv8-a
- .arch_extension crc
- .fpu crypto-neon-fp-armv8
-
-.Lcrc32_constants:
- /*
- * [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
- */
- .quad 0x0000000154442bd4
- .quad 0x00000001c6e41596
-
- /*
- * [(x128+32 mod P(x) << 32)]' << 1 = 0x1751997d0
- * #define CONSTANT_R3 0x1751997d0LL
- *
- * [(x128-32 mod P(x) << 32)]' << 1 = 0x0ccaa009e
- * #define CONSTANT_R4 0x0ccaa009eLL
- */
- .quad 0x00000001751997d0
- .quad 0x00000000ccaa009e
-
- /*
- * [(x64 mod P(x) << 32)]' << 1 = 0x163cd6124
- * #define CONSTANT_R5 0x163cd6124LL
- */
- .quad 0x0000000163cd6124
- .quad 0x00000000FFFFFFFF
-
- /*
- * #define CRCPOLY_TRUE_LE_FULL 0x1DB710641LL
- *
- * Barrett Reduction constant (u64`) = u` = (x**64 / P(x))`
- * = 0x1F7011641LL
- * #define CONSTANT_RU 0x1F7011641LL
- */
- .quad 0x00000001DB710641
- .quad 0x00000001F7011641
-
-.Lcrc32c_constants:
- .quad 0x00000000740eef02
- .quad 0x000000009e4addf8
- .quad 0x00000000f20c0dfe
- .quad 0x000000014cd00bd6
- .quad 0x00000000dd45aab8
- .quad 0x00000000FFFFFFFF
- .quad 0x0000000105ec76f0
- .quad 0x00000000dea713f1
-
- dCONSTANTl .req d0
- dCONSTANTh .req d1
- qCONSTANT .req q0
-
- BUF .req r0
- LEN .req r1
- CRC .req r2
-
- qzr .req q9
-
- /**
- * Calculate crc32
- * BUF - buffer
- * LEN - sizeof buffer (multiple of 16 bytes), LEN should be > 63
- * CRC - initial crc32
- * return %eax crc32
- * uint crc32_pmull_le(unsigned char const *buffer,
- * size_t len, uint crc32)
- */
-SYM_FUNC_START(crc32_pmull_le)
- adr r3, .Lcrc32_constants
- b 0f
-SYM_FUNC_END(crc32_pmull_le)
-
-SYM_FUNC_START(crc32c_pmull_le)
- adr r3, .Lcrc32c_constants
-
-0: bic LEN, LEN, #15
- vld1.8 {q1-q2}, [BUF, :128]!
- vld1.8 {q3-q4}, [BUF, :128]!
- vmov.i8 qzr, #0
- vmov.i8 qCONSTANT, #0
- vmov.32 dCONSTANTl[0], CRC
- veor.8 d2, d2, dCONSTANTl
- sub LEN, LEN, #0x40
- cmp LEN, #0x40
- blt less_64
-
- vld1.64 {qCONSTANT}, [r3]
-
-loop_64: /* 64 bytes Full cache line folding */
- sub LEN, LEN, #0x40
-
- vmull.p64 q5, d3, dCONSTANTh
- vmull.p64 q6, d5, dCONSTANTh
- vmull.p64 q7, d7, dCONSTANTh
- vmull.p64 q8, d9, dCONSTANTh
-
- vmull.p64 q1, d2, dCONSTANTl
- vmull.p64 q2, d4, dCONSTANTl
- vmull.p64 q3, d6, dCONSTANTl
- vmull.p64 q4, d8, dCONSTANTl
-
- veor.8 q1, q1, q5
- vld1.8 {q5}, [BUF, :128]!
- veor.8 q2, q2, q6
- vld1.8 {q6}, [BUF, :128]!
- veor.8 q3, q3, q7
- vld1.8 {q7}, [BUF, :128]!
- veor.8 q4, q4, q8
- vld1.8 {q8}, [BUF, :128]!
-
- veor.8 q1, q1, q5
- veor.8 q2, q2, q6
- veor.8 q3, q3, q7
- veor.8 q4, q4, q8
-
- cmp LEN, #0x40
- bge loop_64
-
-less_64: /* Folding cache line into 128bit */
- vldr dCONSTANTl, [r3, #16]
- vldr dCONSTANTh, [r3, #24]
-
- vmull.p64 q5, d3, dCONSTANTh
- vmull.p64 q1, d2, dCONSTANTl
- veor.8 q1, q1, q5
- veor.8 q1, q1, q2
-
- vmull.p64 q5, d3, dCONSTANTh
- vmull.p64 q1, d2, dCONSTANTl
- veor.8 q1, q1, q5
- veor.8 q1, q1, q3
-
- vmull.p64 q5, d3, dCONSTANTh
- vmull.p64 q1, d2, dCONSTANTl
- veor.8 q1, q1, q5
- veor.8 q1, q1, q4
-
- teq LEN, #0
- beq fold_64
-
-loop_16: /* Folding rest buffer into 128bit */
- subs LEN, LEN, #0x10
-
- vld1.8 {q2}, [BUF, :128]!
- vmull.p64 q5, d3, dCONSTANTh
- vmull.p64 q1, d2, dCONSTANTl
- veor.8 q1, q1, q5
- veor.8 q1, q1, q2
-
- bne loop_16
-
-fold_64:
- /* perform the last 64 bit fold, also adds 32 zeroes
- * to the input stream */
- vmull.p64 q2, d2, dCONSTANTh
- vext.8 q1, q1, qzr, #8
- veor.8 q1, q1, q2
-
- /* final 32-bit fold */
- vldr dCONSTANTl, [r3, #32]
- vldr d6, [r3, #40]
- vmov.i8 d7, #0
-
- vext.8 q2, q1, qzr, #4
- vand.8 d2, d2, d6
- vmull.p64 q1, d2, dCONSTANTl
- veor.8 q1, q1, q2
-
- /* Finish up with the bit-reversed barrett reduction 64 ==> 32 bits */
- vldr dCONSTANTl, [r3, #48]
- vldr dCONSTANTh, [r3, #56]
-
- vand.8 q2, q1, q3
- vext.8 q2, qzr, q2, #8
- vmull.p64 q2, d5, dCONSTANTh
- vand.8 q2, q2, q3
- vmull.p64 q2, d4, dCONSTANTl
- veor.8 q1, q1, q2
- vmov r0, s5
-
- bx lr
-SYM_FUNC_END(crc32c_pmull_le)
-
- .macro __crc32, c
- subs ip, r2, #8
- bmi .Ltail\c
-
- tst r1, #3
- bne .Lunaligned\c
-
- teq ip, #0
-.Laligned8\c:
- ldrd r2, r3, [r1], #8
-ARM_BE8(rev r2, r2 )
-ARM_BE8(rev r3, r3 )
- crc32\c\()w r0, r0, r2
- crc32\c\()w r0, r0, r3
- bxeq lr
- subs ip, ip, #8
- bpl .Laligned8\c
-
-.Ltail\c:
- tst ip, #4
- beq 2f
- ldr r3, [r1], #4
-ARM_BE8(rev r3, r3 )
- crc32\c\()w r0, r0, r3
-
-2: tst ip, #2
- beq 1f
- ldrh r3, [r1], #2
-ARM_BE8(rev16 r3, r3 )
- crc32\c\()h r0, r0, r3
-
-1: tst ip, #1
- bxeq lr
- ldrb r3, [r1]
- crc32\c\()b r0, r0, r3
- bx lr
-
-.Lunaligned\c:
- tst r1, #1
- beq 2f
- ldrb r3, [r1], #1
- subs r2, r2, #1
- crc32\c\()b r0, r0, r3
-
- tst r1, #2
- beq 0f
-2: ldrh r3, [r1], #2
- subs r2, r2, #2
-ARM_BE8(rev16 r3, r3 )
- crc32\c\()h r0, r0, r3
-
-0: subs ip, r2, #8
- bpl .Laligned8\c
- b .Ltail\c
- .endm
-
- .align 5
-SYM_FUNC_START(crc32_armv8_le)
- __crc32
-SYM_FUNC_END(crc32_armv8_le)
-
- .align 5
-SYM_FUNC_START(crc32c_armv8_le)
- __crc32 c
-SYM_FUNC_END(crc32c_armv8_le)
diff --git a/arch/arm/lib/crc32-glue.c b/arch/arm/lib/crc32-glue.c
deleted file mode 100644
index 4340351dbde8..000000000000
--- a/arch/arm/lib/crc32-glue.c
+++ /dev/null
@@ -1,123 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Accelerated CRC32(C) using ARM CRC, NEON and Crypto Extensions instructions
- *
- * Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org>
- */
-
-#include <linux/cpufeature.h>
-#include <linux/crc32.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/string.h>
-
-#include <crypto/internal/simd.h>
-
-#include <asm/hwcap.h>
-#include <asm/neon.h>
-#include <asm/simd.h>
-
-static DEFINE_STATIC_KEY_FALSE(have_crc32);
-static DEFINE_STATIC_KEY_FALSE(have_pmull);
-
-#define PMULL_MIN_LEN 64 /* min size of buffer for pmull functions */
-
-asmlinkage u32 crc32_pmull_le(const u8 buf[], u32 len, u32 init_crc);
-asmlinkage u32 crc32_armv8_le(u32 init_crc, const u8 buf[], u32 len);
-
-asmlinkage u32 crc32c_pmull_le(const u8 buf[], u32 len, u32 init_crc);
-asmlinkage u32 crc32c_armv8_le(u32 init_crc, const u8 buf[], u32 len);
-
-static u32 crc32_le_scalar(u32 crc, const u8 *p, size_t len)
-{
- if (static_branch_likely(&have_crc32))
- return crc32_armv8_le(crc, p, len);
- return crc32_le_base(crc, p, len);
-}
-
-u32 crc32_le_arch(u32 crc, const u8 *p, size_t len)
-{
- if (len >= PMULL_MIN_LEN + 15 &&
- static_branch_likely(&have_pmull) && crypto_simd_usable()) {
- size_t n = -(uintptr_t)p & 15;
-
- /* align p to 16-byte boundary */
- if (n) {
- crc = crc32_le_scalar(crc, p, n);
- p += n;
- len -= n;
- }
- n = round_down(len, 16);
- kernel_neon_begin();
- crc = crc32_pmull_le(p, n, crc);
- kernel_neon_end();
- p += n;
- len -= n;
- }
- return crc32_le_scalar(crc, p, len);
-}
-EXPORT_SYMBOL(crc32_le_arch);
-
-static u32 crc32c_scalar(u32 crc, const u8 *p, size_t len)
-{
- if (static_branch_likely(&have_crc32))
- return crc32c_armv8_le(crc, p, len);
- return crc32c_base(crc, p, len);
-}
-
-u32 crc32c_arch(u32 crc, const u8 *p, size_t len)
-{
- if (len >= PMULL_MIN_LEN + 15 &&
- static_branch_likely(&have_pmull) && crypto_simd_usable()) {
- size_t n = -(uintptr_t)p & 15;
-
- /* align p to 16-byte boundary */
- if (n) {
- crc = crc32c_scalar(crc, p, n);
- p += n;
- len -= n;
- }
- n = round_down(len, 16);
- kernel_neon_begin();
- crc = crc32c_pmull_le(p, n, crc);
- kernel_neon_end();
- p += n;
- len -= n;
- }
- return crc32c_scalar(crc, p, len);
-}
-EXPORT_SYMBOL(crc32c_arch);
-
-u32 crc32_be_arch(u32 crc, const u8 *p, size_t len)
-{
- return crc32_be_base(crc, p, len);
-}
-EXPORT_SYMBOL(crc32_be_arch);
-
-static int __init crc32_arm_init(void)
-{
- if (elf_hwcap2 & HWCAP2_CRC32)
- static_branch_enable(&have_crc32);
- if (elf_hwcap2 & HWCAP2_PMULL)
- static_branch_enable(&have_pmull);
- return 0;
-}
-arch_initcall(crc32_arm_init);
-
-static void __exit crc32_arm_exit(void)
-{
-}
-module_exit(crc32_arm_exit);
-
-u32 crc32_optimizations(void)
-{
- if (elf_hwcap2 & (HWCAP2_CRC32 | HWCAP2_PMULL))
- return CRC32_LE_OPTIMIZATION | CRC32C_OPTIMIZATION;
- return 0;
-}
-EXPORT_SYMBOL(crc32_optimizations);
-
-MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
-MODULE_DESCRIPTION("Accelerated CRC32(C) using ARM CRC, NEON and Crypto Extensions");
-MODULE_LICENSE("GPL v2");
generated by cgit (git 2.34.1) at 2025-08-06 07:55:55 +0000