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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* SM3 optimized for x86_64
*
* Copyright 2026 Google LLC
*/
#include <asm/fpu/api.h>
#include <linux/static_call.h>
asmlinkage void sm3_transform_avx(struct sm3_block_state *state,
const u8 *data, size_t nblocks);
static void sm3_blocks_avx(struct sm3_block_state *state,
const u8 *data, size_t nblocks)
{
if (likely(irq_fpu_usable())) {
kernel_fpu_begin();
sm3_transform_avx(state, data, nblocks);
kernel_fpu_end();
} else {
sm3_blocks_generic(state, data, nblocks);
}
}
DEFINE_STATIC_CALL(sm3_blocks_x86, sm3_blocks_generic);
static void sm3_blocks(struct sm3_block_state *state,
const u8 *data, size_t nblocks)
{
static_call(sm3_blocks_x86)(state, data, nblocks);
}
#define sm3_mod_init_arch sm3_mod_init_arch
static void sm3_mod_init_arch(void)
{
if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_BMI2) &&
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
static_call_update(sm3_blocks_x86, sm3_blocks_avx);
}
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