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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* SHA-512 and SHA-384 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 sha512_transform_zvknhb_zvkb(struct sha512_block_state *state,
const u8 *data, size_t nblocks);
static void sha512_blocks(struct sha512_block_state *state,
const u8 *data, size_t nblocks)
{
if (static_branch_likely(&have_extensions) && likely(may_use_simd())) {
kernel_vector_begin();
sha512_transform_zvknhb_zvkb(state, data, nblocks);
kernel_vector_end();
} else {
sha512_blocks_generic(state, data, nblocks);
}
}
#define sha512_mod_init_arch sha512_mod_init_arch
static void sha512_mod_init_arch(void)
{
if (riscv_isa_extension_available(NULL, ZVKNHB) &&
riscv_isa_extension_available(NULL, ZVKB) &&
riscv_vector_vlen() >= 128)
static_branch_enable(&have_extensions);
}
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