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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>
75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ChaCha stream cipher (RISC-V optimized)
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*
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* Copyright (C) 2023 SiFive, Inc.
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* Author: Jerry Shih <jerry.shih@sifive.com>
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*/
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#include <asm/simd.h>
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#include <asm/vector.h>
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#include <crypto/chacha.h>
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#include <crypto/internal/simd.h>
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#include <linux/linkage.h>
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#include <linux/module.h>
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(use_zvkb);
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asmlinkage void chacha_zvkb(u32 state[16], const u8 *in, u8 *out,
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size_t nblocks, int nrounds);
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void hchacha_block_arch(const u32 *state, u32 *out, int nrounds)
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{
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hchacha_block_generic(state, out, nrounds);
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}
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EXPORT_SYMBOL(hchacha_block_arch);
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void chacha_crypt_arch(u32 *state, u8 *dst, const u8 *src, unsigned int bytes,
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int nrounds)
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{
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u8 block_buffer[CHACHA_BLOCK_SIZE];
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unsigned int full_blocks = bytes / CHACHA_BLOCK_SIZE;
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unsigned int tail_bytes = bytes % CHACHA_BLOCK_SIZE;
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if (!static_branch_likely(&use_zvkb) || !crypto_simd_usable())
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return chacha_crypt_generic(state, dst, src, bytes, nrounds);
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kernel_vector_begin();
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if (full_blocks) {
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chacha_zvkb(state, src, dst, full_blocks, nrounds);
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src += full_blocks * CHACHA_BLOCK_SIZE;
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dst += full_blocks * CHACHA_BLOCK_SIZE;
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}
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if (tail_bytes) {
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memcpy(block_buffer, src, tail_bytes);
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chacha_zvkb(state, block_buffer, block_buffer, 1, nrounds);
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memcpy(dst, block_buffer, tail_bytes);
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}
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kernel_vector_end();
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}
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EXPORT_SYMBOL(chacha_crypt_arch);
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bool chacha_is_arch_optimized(void)
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{
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return static_key_enabled(&use_zvkb);
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}
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EXPORT_SYMBOL(chacha_is_arch_optimized);
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static int __init riscv64_chacha_mod_init(void)
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{
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if (riscv_isa_extension_available(NULL, ZVKB) &&
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riscv_vector_vlen() >= 128)
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static_branch_enable(&use_zvkb);
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return 0;
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}
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subsys_initcall(riscv64_chacha_mod_init);
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static void __exit riscv64_chacha_mod_exit(void)
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{
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}
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module_exit(riscv64_chacha_mod_exit);
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MODULE_DESCRIPTION("ChaCha stream cipher (RISC-V optimized)");
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MODULE_AUTHOR("Jerry Shih <jerry.shih@sifive.com>");
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MODULE_LICENSE("GPL");
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