/* * ChaCha20 256-bit cipher algorithm, RFC7539 * * Copyright (C) 2015 Martin Willi * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include #include #include #include #include #include static inline u32 rotl32(u32 v, u8 n) { return (v << n) | (v >> (sizeof(v) * 8 - n)); } extern void chacha20_block(u32 *state, void *stream) { u32 x[16], *out = stream; int i; for (i = 0; i < ARRAY_SIZE(x); i++) x[i] = state[i]; for (i = 0; i < 20; i += 2) { x[0] += x[4]; x[12] = rotl32(x[12] ^ x[0], 16); x[1] += x[5]; x[13] = rotl32(x[13] ^ x[1], 16); x[2] += x[6]; x[14] = rotl32(x[14] ^ x[2], 16); x[3] += x[7]; x[15] = rotl32(x[15] ^ x[3], 16); x[8] += x[12]; x[4] = rotl32(x[4] ^ x[8], 12); x[9] += x[13]; x[5] = rotl32(x[5] ^ x[9], 12); x[10] += x[14]; x[6] = rotl32(x[6] ^ x[10], 12); x[11] += x[15]; x[7] = rotl32(x[7] ^ x[11], 12); x[0] += x[4]; x[12] = rotl32(x[12] ^ x[0], 8); x[1] += x[5]; x[13] = rotl32(x[13] ^ x[1], 8); x[2] += x[6]; x[14] = rotl32(x[14] ^ x[2], 8); x[3] += x[7]; x[15] = rotl32(x[15] ^ x[3], 8); x[8] += x[12]; x[4] = rotl32(x[4] ^ x[8], 7); x[9] += x[13]; x[5] = rotl32(x[5] ^ x[9], 7); x[10] += x[14]; x[6] = rotl32(x[6] ^ x[10], 7); x[11] += x[15]; x[7] = rotl32(x[7] ^ x[11], 7); x[0] += x[5]; x[15] = rotl32(x[15] ^ x[0], 16); x[1] += x[6]; x[12] = rotl32(x[12] ^ x[1], 16); x[2] += x[7]; x[13] = rotl32(x[13] ^ x[2], 16); x[3] += x[4]; x[14] = rotl32(x[14] ^ x[3], 16); x[10] += x[15]; x[5] = rotl32(x[5] ^ x[10], 12); x[11] += x[12]; x[6] = rotl32(x[6] ^ x[11], 12); x[8] += x[13]; x[7] = rotl32(x[7] ^ x[8], 12); x[9] += x[14]; x[4] = rotl32(x[4] ^ x[9], 12); x[0] += x[5]; x[15] = rotl32(x[15] ^ x[0], 8); x[1] += x[6]; x[12] = rotl32(x[12] ^ x[1], 8); x[2] += x[7]; x[13] = rotl32(x[13] ^ x[2], 8); x[3] += x[4]; x[14] = rotl32(x[14] ^ x[3], 8); x[10] += x[15]; x[5] = rotl32(x[5] ^ x[10], 7); x[11] += x[12]; x[6] = rotl32(x[6] ^ x[11], 7); x[8] += x[13]; x[7] = rotl32(x[7] ^ x[8], 7); x[9] += x[14]; x[4] = rotl32(x[4] ^ x[9], 7); } for (i = 0; i < ARRAY_SIZE(x); i++) out[i] = cpu_to_le32(x[i] + state[i]); state[12]++; } EXPORT_SYMBOL(chacha20_block); e
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authorRandy Dunlap <rdunlap@infradead.org>2017-01-24 15:18:49 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 16:26:14 -0800
commit3705ccfdd1e8b539225ce20e3925a945cc788d67 (patch)
tree99e56310f1dad0b63ac34307f4e2536a675972b6 /tools/perf/arch
parentf598f82e204ec0b17797caaf1b0311c52d43fb9a (diff)
mn10300: fix build error of missing fpu_save()
When CONFIG_FPU is not enabled on arch/mn10300, <asm/switch_to.h> causes a build error with a call to fpu_save(): kernel/built-in.o: In function `.L410': core.c:(.sched.text+0x28a): undefined reference to `fpu_save' Fix this by including <asm/fpu.h> in <asm/switch_to.h> so that an empty static inline fpu_save() is defined. Link: http://lkml.kernel.org/r/dc421c4f-4842-4429-1b99-92865c2f24b6@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kbuild test robot <fengguang.wu@intel.com> Reviewed-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/perf/arch')