mirror of https://github.com/torvalds/linux.git
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* MD5 accelerated using the sparc64 crypto opcodes
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*
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* Copyright (c) Alan Smithee.
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
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* Copyright (c) Mathias Krause <minipli@googlemail.com>
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* Copyright (c) Cryptoapi developers.
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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*/
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#include <asm/elf.h>
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#include <asm/opcodes.h>
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#include <asm/pstate.h>
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_md5_opcodes);
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asmlinkage void md5_sparc64_transform(struct md5_block_state *state,
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const u8 *data, size_t nblocks);
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static void md5_blocks(struct md5_block_state *state,
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const u8 *data, size_t nblocks)
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{
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if (static_branch_likely(&have_md5_opcodes)) {
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cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
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md5_sparc64_transform(state, data, nblocks);
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le32_to_cpu_array(state->h, ARRAY_SIZE(state->h));
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} else {
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md5_blocks_generic(state, data, nblocks);
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}
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}
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#define md5_mod_init_arch md5_mod_init_arch
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static void md5_mod_init_arch(void)
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{
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unsigned long cfr;
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if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
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return;
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__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
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if (!(cfr & CFR_MD5))
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return;
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static_branch_enable(&have_md5_opcodes);
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pr_info("Using sparc64 md5 opcode optimized MD5 implementation\n");
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}
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