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ef93f15628
This reverts commit c4741b2305.
Crypto API self-tests no longer run at registration time and now
occur either at late_initcall or upon the first use.
Therefore the premise of the above commit no longer exists. Revert
it and subsequent additions of subsys_initcall and arch_initcall.
Note that lib/crypto calls will stay at subsys_initcall (or rather
downgraded from arch_initcall) because they may need to occur
before Crypto API registration.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* SHA-256 optimized for ARM64
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*
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* Copyright 2025 Google LLC
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*/
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#include <asm/neon.h>
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#include <crypto/internal/sha2.h>
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#include <crypto/internal/simd.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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asmlinkage void sha256_block_data_order(u32 state[SHA256_STATE_WORDS],
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const u8 *data, size_t nblocks);
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asmlinkage void sha256_block_neon(u32 state[SHA256_STATE_WORDS],
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const u8 *data, size_t nblocks);
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asmlinkage size_t __sha256_ce_transform(u32 state[SHA256_STATE_WORDS],
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const u8 *data, size_t nblocks);
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_ce);
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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 (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
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static_branch_likely(&have_neon) && crypto_simd_usable()) {
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if (static_branch_likely(&have_ce)) {
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do {
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size_t rem;
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kernel_neon_begin();
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rem = __sha256_ce_transform(state,
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data, nblocks);
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kernel_neon_end();
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data += (nblocks - rem) * SHA256_BLOCK_SIZE;
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nblocks = rem;
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} while (nblocks);
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} else {
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kernel_neon_begin();
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sha256_block_neon(state, data, nblocks);
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kernel_neon_end();
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}
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} else {
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sha256_block_data_order(state, data, nblocks);
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}
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}
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EXPORT_SYMBOL(sha256_blocks_arch);
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bool sha256_is_arch_optimized(void)
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{
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/* We always can use at least the ARM64 scalar implementation. */
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return true;
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}
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EXPORT_SYMBOL(sha256_is_arch_optimized);
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static int __init sha256_arm64_mod_init(void)
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{
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if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
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cpu_have_named_feature(ASIMD)) {
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static_branch_enable(&have_neon);
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if (cpu_have_named_feature(SHA2))
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static_branch_enable(&have_ce);
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}
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return 0;
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}
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subsys_initcall(sha256_arm64_mod_init);
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static void __exit sha256_arm64_mod_exit(void)
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{
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}
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module_exit(sha256_arm64_mod_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA-256 optimized for ARM64");
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