| /* SPDX-License-Identifier: GPL-2.0-or-later */ | |
| /* | |
| * SHA-1 optimized for ARM | |
| * | |
| * Copyright 2025 Google LLC | |
| */ | |
| #include <asm/simd.h> | |
| static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon); | |
| static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_ce); | |
| asmlinkage void sha1_block_data_order(struct sha1_block_state *state, | |
| const u8 *data, size_t nblocks); | |
| asmlinkage void sha1_transform_neon(struct sha1_block_state *state, | |
| const u8 *data, size_t nblocks); | |
| asmlinkage void sha1_ce_transform(struct sha1_block_state *state, | |
| const u8 *data, size_t nblocks); | |
| static void sha1_blocks(struct sha1_block_state *state, | |
| const u8 *data, size_t nblocks) | |
| { | |
| if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && | |
| static_branch_likely(&have_neon) && likely(may_use_simd())) { | |
| scoped_ksimd() { | |
| if (static_branch_likely(&have_ce)) | |
| sha1_ce_transform(state, data, nblocks); | |
| else | |
| sha1_transform_neon(state, data, nblocks); | |
| } | |
| } else { | |
| sha1_block_data_order(state, data, nblocks); | |
| } | |
| } | |
| #ifdef CONFIG_KERNEL_MODE_NEON | |
| #define sha1_mod_init_arch sha1_mod_init_arch | |
| static void sha1_mod_init_arch(void) | |
| { | |
| if (elf_hwcap & HWCAP_NEON) { | |
| static_branch_enable(&have_neon); | |
| if (elf_hwcap2 & HWCAP2_SHA1) | |
| static_branch_enable(&have_ce); | |
| } | |
| } | |
| #endif /* CONFIG_KERNEL_MODE_NEON */ |