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377982d561
Instead of exposing the s390-optimized SHA-1 code via s390-specific crypto_shash algorithms, instead just implement the sha1_blocks() library function. This is much simpler, it makes the SHA-1 library functions be s390-optimized, and it fixes the longstanding issue where the s390-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. Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20250712232329.818226-12-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
28 lines
788 B
C
28 lines
788 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* SHA-1 optimized using the CP Assist for Cryptographic Functions (CPACF)
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*
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* Copyright 2025 Google LLC
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*/
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#include <asm/cpacf.h>
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#include <linux/cpufeature.h>
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_cpacf_sha1);
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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_cpacf_sha1))
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cpacf_kimd(CPACF_KIMD_SHA_1, state, data,
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nblocks * SHA1_BLOCK_SIZE);
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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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if (cpu_have_feature(S390_CPU_FEATURE_MSA) &&
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cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_1))
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static_branch_enable(&have_cpacf_sha1);
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}
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