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c751059985
Instead of exposing the sparc-optimized SHA-1 code via sparc-specific crypto_shash algorithms, instead just implement the sha1_blocks() library function. This is much simpler, it makes the SHA-1 library functions be sparc-optimized, and it fixes the longstanding issue where the sparc-optimized SHA-1 code was disabled by default. SHA-1 still remains available through crypto_shash, but individual architectures no longer need to handle it. Note: to see the diff from arch/sparc/crypto/sha1_glue.c to lib/crypto/sparc/sha1.h, view this commit with 'git show -M10'. Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20250712232329.818226-13-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* SHA-1 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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*/
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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_sha1_opcodes);
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asmlinkage void sha1_sparc64_transform(struct sha1_block_state *state,
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const u8 *data, size_t nblocks);
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static void sha1_blocks(struct sha1_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_sha1_opcodes))
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sha1_sparc64_transform(state, data, nblocks);
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else
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sha1_blocks_generic(state, data, nblocks);
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}
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#define sha1_mod_init_arch sha1_mod_init_arch
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static inline void sha1_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_SHA1))
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return;
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static_branch_enable(&have_sha1_opcodes);
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pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
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}
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