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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#include <asm/hwcap.h>
#include <asm/neon.h>
#include <asm/simd.h>
#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && __LINUX_ARM_ARCH__ == 7
#define ARM_USE_NEON
asmlinkage void curve25519_neon(u8 mypublic[CURVE25519_POINT_SIZE],
const u8 secret[CURVE25519_POINT_SIZE],
const u8 basepoint[CURVE25519_POINT_SIZE]);
#endif
static bool curve25519_use_neon __ro_after_init;
static void __init curve25519_fpu_init(void)
{
curve25519_use_neon = elf_hwcap & HWCAP_NEON;
}
static inline bool curve25519_arch(u8 mypublic[CURVE25519_POINT_SIZE],
const u8 secret[CURVE25519_POINT_SIZE],
const u8 basepoint[CURVE25519_POINT_SIZE])
{
#ifdef ARM_USE_NEON
if (curve25519_use_neon && may_use_simd()) {
kernel_neon_begin();
curve25519_neon(mypublic, secret, basepoint);
kernel_neon_end();
return true;
}
#endif
return false;
}
static inline bool curve25519_base_arch(u8 pub[CURVE25519_POINT_SIZE],
const u8 secret[CURVE25519_POINT_SIZE])
{
return false;
}
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