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43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* SHA-512 accelerated using the sparc64 sha512 opcodes
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*
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* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
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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_sha512_opcodes);
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asmlinkage void sha512_sparc64_transform(struct sha512_block_state *state,
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const u8 *data, size_t nblocks);
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static void sha512_blocks(struct sha512_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_sha512_opcodes))
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sha512_sparc64_transform(state, data, nblocks);
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else
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sha512_blocks_generic(state, data, nblocks);
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}
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#define sha512_mod_init_arch sha512_mod_init_arch
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static inline void sha512_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_SHA512))
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return;
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static_branch_enable(&have_sha512_opcodes);
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pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n");
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}
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