diff options
Diffstat (limited to 'lib/crypto/riscv/sm3.h')
| -rw-r--r-- | lib/crypto/riscv/sm3.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/crypto/riscv/sm3.h b/lib/crypto/riscv/sm3.h new file mode 100644 index 000000000..c1fbee709 --- /dev/null +++ b/lib/crypto/riscv/sm3.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * SM3 using the RISC-V vector crypto extensions + * + * Copyright (C) 2023 VRULL GmbH + * Author: Heiko Stuebner <heiko.stuebner@vrull.eu> + * + * Copyright (C) 2023 SiFive, Inc. + * Author: Jerry Shih <jerry.shih@sifive.com> + */ + +#include <asm/simd.h> +#include <asm/vector.h> + +static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_extensions); + +asmlinkage void sm3_transform_zvksh_zvkb(struct sm3_block_state *state, + const u8 *data, size_t nblocks); + +static void sm3_blocks(struct sm3_block_state *state, + const u8 *data, size_t nblocks) +{ + if (static_branch_likely(&have_extensions) && likely(may_use_simd())) { + kernel_vector_begin(); + sm3_transform_zvksh_zvkb(state, data, nblocks); + kernel_vector_end(); + } else { + sm3_blocks_generic(state, data, nblocks); + } +} + +#define sm3_mod_init_arch sm3_mod_init_arch +static void sm3_mod_init_arch(void) +{ + if (riscv_isa_extension_available(NULL, ZVKSH) && + riscv_isa_extension_available(NULL, ZVKB) && + riscv_vector_vlen() >= 128) + static_branch_enable(&have_extensions); +} |