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29 lines
816 B
C
29 lines
816 B
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* SHA-512 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_sha512);
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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_cpacf_sha512))
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cpacf_kimd(CPACF_KIMD_SHA_512, state, data,
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nblocks * SHA512_BLOCK_SIZE);
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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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if (cpu_have_feature(S390_CPU_FEATURE_MSA) &&
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cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_512))
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static_branch_enable(&have_cpacf_sha512);
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}
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