Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
|---|---|
| 2 | /* |
| 3 | * SHA-256 optimized for ARM |
| 4 | * |
| 5 | * Copyright 2025 Google LLC |
| 6 | */ |
| 7 | #include <asm/neon.h> |
| 8 | #include <asm/simd.h> |
| 9 | |
| 10 | static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon); |
| 11 | static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_ce); |
| 12 | |
| 13 | asmlinkage void sha256_block_data_order(struct sha256_block_state *state, |
| 14 | const u8 *data, size_t nblocks); |
| 15 | asmlinkage void sha256_block_data_order_neon(struct sha256_block_state *state, |
| 16 | const u8 *data, size_t nblocks); |
| 17 | asmlinkage void sha256_ce_transform(struct sha256_block_state *state, |
| 18 | const u8 *data, size_t nblocks); |
| 19 | |
| 20 | static void sha256_blocks(struct sha256_block_state *state, |
| 21 | const u8 *data, size_t nblocks) |
| 22 | { |
| 23 | if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && |
| 24 | static_branch_likely(&have_neon) && likely(may_use_simd())) { |
| 25 | scoped_ksimd() { |
| 26 | if (static_branch_likely(&have_ce)) |
| 27 | sha256_ce_transform(state, data, nblocks); |
| 28 | else |
| 29 | sha256_block_data_order_neon(state, data, nblocks); |
| 30 | } |
| 31 | } else { |
| 32 | sha256_block_data_order(state, data, nblocks); |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | #ifdef CONFIG_KERNEL_MODE_NEON |
| 37 | #define sha256_mod_init_arch sha256_mod_init_arch |
| 38 | static void sha256_mod_init_arch(void) |
| 39 | { |
| 40 | if (elf_hwcap & HWCAP_NEON) { |
| 41 | static_branch_enable(&have_neon); |
| 42 | if (elf_hwcap2 & HWCAP2_SHA2) |
| 43 | static_branch_enable(&have_ce); |
| 44 | } |
| 45 | } |
| 46 | #endif /* CONFIG_KERNEL_MODE_NEON */ |
| 47 |
Warning: This file is not a C or C++ file. It does not have highlighting.