Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*
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* Based on public domain code from Daniel J. Bernstein and Peter Schwabe. This
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* began from SUPERCOP's curve25519/neon2/scalarmult.s, but has subsequently been
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* manually reworked for use in kernel space.
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*/
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#include <asm/hwcap.h>
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#include <asm/neon.h>
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#include <asm/simd.h>
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#include <crypto/internal/simd.h>
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#include <linux/types.h>
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#include <linux/jump_label.h>
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asmlinkage void curve25519_neon(u8 mypublic[CURVE25519_KEY_SIZE],
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const u8 secret[CURVE25519_KEY_SIZE],
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const u8 basepoint[CURVE25519_KEY_SIZE]);
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
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static void curve25519_arch(u8 out[CURVE25519_KEY_SIZE],
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const u8 scalar[CURVE25519_KEY_SIZE],
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const u8 point[CURVE25519_KEY_SIZE])
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{
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if (static_branch_likely(&have_neon) && crypto_simd_usable()) {
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scoped_ksimd()
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curve25519_neon(out, scalar, point);
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} else {
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curve25519_generic(out, scalar, point);
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}
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}
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static void curve25519_base_arch(u8 pub[CURVE25519_KEY_SIZE],
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const u8 secret[CURVE25519_KEY_SIZE])
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{
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curve25519_arch(pub, secret, curve25519_base_point);
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}
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#define curve25519_mod_init_arch curve25519_mod_init_arch
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static void curve25519_mod_init_arch(void)
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{
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if (elf_hwcap & HWCAP_NEON)
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static_branch_enable(&have_neon);
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}
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