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b8456f7aaf
Move the contents of arch/s390/lib/crypto/ into lib/crypto/s390/. The new code organization makes a lot more sense for how this code actually works and is developed. In particular, it makes it possible to build each algorithm as a single module, with better inlining and dead code elimination. For a more detailed explanation, see the patchset which did this for the CRC library code: https://lore.kernel.org/r/20250607200454.73587-1-ebiggers@kernel.org/. Also see the patchset which did this for SHA-512: https://lore.kernel.org/linux-crypto/20250616014019.415791-1-ebiggers@kernel.org/ This is just a preparatory commit, which does the move to get the files into their new location but keeps them building the same way as before. Later commits will make the actual improvements to the way the arch-optimized code is integrated for each algorithm. Acked-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Sohil Mehta <sohil.mehta@intel.com> Link: https://lore.kernel.org/r/20250619191908.134235-7-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* SHA-256 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 <crypto/internal/sha2.h>
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#include <linux/cpufeature.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_cpacf_sha256);
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void sha256_blocks_arch(u32 state[SHA256_STATE_WORDS],
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const u8 *data, size_t nblocks)
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{
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if (static_branch_likely(&have_cpacf_sha256))
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cpacf_kimd(CPACF_KIMD_SHA_256, state, data,
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nblocks * SHA256_BLOCK_SIZE);
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else
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sha256_blocks_generic(state, data, nblocks);
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}
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EXPORT_SYMBOL_GPL(sha256_blocks_arch);
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bool sha256_is_arch_optimized(void)
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{
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return static_key_enabled(&have_cpacf_sha256);
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}
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EXPORT_SYMBOL_GPL(sha256_is_arch_optimized);
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static int __init sha256_s390_mod_init(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_256))
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static_branch_enable(&have_cpacf_sha256);
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return 0;
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}
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subsys_initcall(sha256_s390_mod_init);
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static void __exit sha256_s390_mod_exit(void)
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{
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}
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module_exit(sha256_s390_mod_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA-256 using the CP Assist for Cryptographic Functions (CPACF)");
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