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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* SM3 optimized for ARM64
*
* Copyright 2026 Google LLC
*/
#include <asm/simd.h>
#include <linux/cpufeature.h>
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_ce);
asmlinkage void sm3_neon_transform(struct sm3_block_state *state,
const u8 *data, size_t nblocks);
asmlinkage void sm3_ce_transform(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_neon) && likely(may_use_simd())) {
scoped_ksimd() {
if (static_branch_likely(&have_ce))
sm3_ce_transform(state, data, nblocks);
else
sm3_neon_transform(state, data, nblocks);
}
} else {
sm3_blocks_generic(state, data, nblocks);
}
}
#define sm3_mod_init_arch sm3_mod_init_arch
static void sm3_mod_init_arch(void)
{
if (cpu_have_named_feature(ASIMD)) {
static_branch_enable(&have_neon);
if (cpu_have_named_feature(SM3))
static_branch_enable(&have_ce);
}
}
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