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Diffstat (limited to 'target/linux/generic/backport-5.4/080-wireguard-0008-crypto-arm-chacha-remove-dependency-on-generic-ChaCh.patch')
-rw-r--r--target/linux/generic/backport-5.4/080-wireguard-0008-crypto-arm-chacha-remove-dependency-on-generic-ChaCh.patch691
1 files changed, 0 insertions, 691 deletions
diff --git a/target/linux/generic/backport-5.4/080-wireguard-0008-crypto-arm-chacha-remove-dependency-on-generic-ChaCh.patch b/target/linux/generic/backport-5.4/080-wireguard-0008-crypto-arm-chacha-remove-dependency-on-generic-ChaCh.patch
deleted file mode 100644
index 88c9738dbc..0000000000
--- a/target/linux/generic/backport-5.4/080-wireguard-0008-crypto-arm-chacha-remove-dependency-on-generic-ChaCh.patch
+++ /dev/null
@@ -1,691 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Ard Biesheuvel <ardb@kernel.org>
-Date: Fri, 8 Nov 2019 13:22:14 +0100
-Subject: [PATCH] crypto: arm/chacha - remove dependency on generic ChaCha
- driver
-
-commit b36d8c09e710c71f6a9690b6586fea2d1c9e1e27 upstream.
-
-Instead of falling back to the generic ChaCha skcipher driver for
-non-SIMD cases, use a fast scalar implementation for ARM authored
-by Eric Biggers. This removes the module dependency on chacha-generic
-altogether, which also simplifies things when we expose the ChaCha
-library interface from this module.
-
-Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
-Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
----
- arch/arm/crypto/Kconfig | 4 +-
- arch/arm/crypto/Makefile | 3 +-
- arch/arm/crypto/chacha-glue.c | 304 +++++++++++++++++++++++++++
- arch/arm/crypto/chacha-neon-glue.c | 202 ------------------
- arch/arm/crypto/chacha-scalar-core.S | 65 +++---
- arch/arm64/crypto/chacha-neon-glue.c | 2 +-
- 6 files changed, 340 insertions(+), 240 deletions(-)
- create mode 100644 arch/arm/crypto/chacha-glue.c
- delete mode 100644 arch/arm/crypto/chacha-neon-glue.c
-
---- a/arch/arm/crypto/Kconfig
-+++ b/arch/arm/crypto/Kconfig
-@@ -127,10 +127,8 @@ config CRYPTO_CRC32_ARM_CE
- select CRYPTO_HASH
-
- config CRYPTO_CHACHA20_NEON
-- tristate "NEON accelerated ChaCha stream cipher algorithms"
-- depends on KERNEL_MODE_NEON
-+ tristate "NEON and scalar accelerated ChaCha stream cipher algorithms"
- select CRYPTO_BLKCIPHER
-- select CRYPTO_CHACHA20
-
- config CRYPTO_NHPOLY1305_NEON
- tristate "NEON accelerated NHPoly1305 hash function (for Adiantum)"
---- a/arch/arm/crypto/Makefile
-+++ b/arch/arm/crypto/Makefile
-@@ -53,7 +53,8 @@ aes-arm-ce-y := aes-ce-core.o aes-ce-glu
- ghash-arm-ce-y := ghash-ce-core.o ghash-ce-glue.o
- crct10dif-arm-ce-y := crct10dif-ce-core.o crct10dif-ce-glue.o
- crc32-arm-ce-y:= crc32-ce-core.o crc32-ce-glue.o
--chacha-neon-y := chacha-neon-core.o chacha-neon-glue.o
-+chacha-neon-y := chacha-scalar-core.o chacha-glue.o
-+chacha-neon-$(CONFIG_KERNEL_MODE_NEON) += chacha-neon-core.o
- nhpoly1305-neon-y := nh-neon-core.o nhpoly1305-neon-glue.o
-
- ifdef REGENERATE_ARM_CRYPTO
---- /dev/null
-+++ b/arch/arm/crypto/chacha-glue.c
-@@ -0,0 +1,304 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * ARM NEON accelerated ChaCha and XChaCha stream ciphers,
-+ * including ChaCha20 (RFC7539)
-+ *
-+ * Copyright (C) 2016-2019 Linaro, Ltd. <ard.biesheuvel@linaro.org>
-+ * Copyright (C) 2015 Martin Willi
-+ */
-+
-+#include <crypto/algapi.h>
-+#include <crypto/internal/chacha.h>
-+#include <crypto/internal/simd.h>
-+#include <crypto/internal/skcipher.h>
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+
-+#include <asm/cputype.h>
-+#include <asm/hwcap.h>
-+#include <asm/neon.h>
-+#include <asm/simd.h>
-+
-+asmlinkage void chacha_block_xor_neon(const u32 *state, u8 *dst, const u8 *src,
-+ int nrounds);
-+asmlinkage void chacha_4block_xor_neon(const u32 *state, u8 *dst, const u8 *src,
-+ int nrounds);
-+asmlinkage void hchacha_block_arm(const u32 *state, u32 *out, int nrounds);
-+asmlinkage void hchacha_block_neon(const u32 *state, u32 *out, int nrounds);
-+
-+asmlinkage void chacha_doarm(u8 *dst, const u8 *src, unsigned int bytes,
-+ const u32 *state, int nrounds);
-+
-+static inline bool neon_usable(void)
-+{
-+ return crypto_simd_usable();
-+}
-+
-+static void chacha_doneon(u32 *state, u8 *dst, const u8 *src,
-+ unsigned int bytes, int nrounds)
-+{
-+ u8 buf[CHACHA_BLOCK_SIZE];
-+
-+ while (bytes >= CHACHA_BLOCK_SIZE * 4) {
-+ chacha_4block_xor_neon(state, dst, src, nrounds);
-+ bytes -= CHACHA_BLOCK_SIZE * 4;
-+ src += CHACHA_BLOCK_SIZE * 4;
-+ dst += CHACHA_BLOCK_SIZE * 4;
-+ state[12] += 4;
-+ }
-+ while (bytes >= CHACHA_BLOCK_SIZE) {
-+ chacha_block_xor_neon(state, dst, src, nrounds);
-+ bytes -= CHACHA_BLOCK_SIZE;
-+ src += CHACHA_BLOCK_SIZE;
-+ dst += CHACHA_BLOCK_SIZE;
-+ state[12]++;
-+ }
-+ if (bytes) {
-+ memcpy(buf, src, bytes);
-+ chacha_block_xor_neon(state, buf, buf, nrounds);
-+ memcpy(dst, buf, bytes);
-+ }
-+}
-+
-+static int chacha_stream_xor(struct skcipher_request *req,
-+ const struct chacha_ctx *ctx, const u8 *iv,
-+ bool neon)
-+{
-+ struct skcipher_walk walk;
-+ u32 state[16];
-+ int err;
-+
-+ err = skcipher_walk_virt(&walk, req, false);
-+
-+ chacha_init_generic(state, ctx->key, iv);
-+
-+ while (walk.nbytes > 0) {
-+ unsigned int nbytes = walk.nbytes;
-+
-+ if (nbytes < walk.total)
-+ nbytes = round_down(nbytes, walk.stride);
-+
-+ if (!neon) {
-+ chacha_doarm(walk.dst.virt.addr, walk.src.virt.addr,
-+ nbytes, state, ctx->nrounds);
-+ state[12] += DIV_ROUND_UP(nbytes, CHACHA_BLOCK_SIZE);
-+ } else {
-+ kernel_neon_begin();
-+ chacha_doneon(state, walk.dst.virt.addr,
-+ walk.src.virt.addr, nbytes, ctx->nrounds);
-+ kernel_neon_end();
-+ }
-+ err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
-+ }
-+
-+ return err;
-+}
-+
-+static int do_chacha(struct skcipher_request *req, bool neon)
-+{
-+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
-+ struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
-+
-+ return chacha_stream_xor(req, ctx, req->iv, neon);
-+}
-+
-+static int chacha_arm(struct skcipher_request *req)
-+{
-+ return do_chacha(req, false);
-+}
-+
-+static int chacha_neon(struct skcipher_request *req)
-+{
-+ return do_chacha(req, neon_usable());
-+}
-+
-+static int do_xchacha(struct skcipher_request *req, bool neon)
-+{
-+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
-+ struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
-+ struct chacha_ctx subctx;
-+ u32 state[16];
-+ u8 real_iv[16];
-+
-+ chacha_init_generic(state, ctx->key, req->iv);
-+
-+ if (!neon) {
-+ hchacha_block_arm(state, subctx.key, ctx->nrounds);
-+ } else {
-+ kernel_neon_begin();
-+ hchacha_block_neon(state, subctx.key, ctx->nrounds);
-+ kernel_neon_end();
-+ }
-+ subctx.nrounds = ctx->nrounds;
-+
-+ memcpy(&real_iv[0], req->iv + 24, 8);
-+ memcpy(&real_iv[8], req->iv + 16, 8);
-+ return chacha_stream_xor(req, &subctx, real_iv, neon);
-+}
-+
-+static int xchacha_arm(struct skcipher_request *req)
-+{
-+ return do_xchacha(req, false);
-+}
-+
-+static int xchacha_neon(struct skcipher_request *req)
-+{
-+ return do_xchacha(req, neon_usable());
-+}
-+
-+static struct skcipher_alg arm_algs[] = {
-+ {
-+ .base.cra_name = "chacha20",
-+ .base.cra_driver_name = "chacha20-arm",
-+ .base.cra_priority = 200,
-+ .base.cra_blocksize = 1,
-+ .base.cra_ctxsize = sizeof(struct chacha_ctx),
-+ .base.cra_module = THIS_MODULE,
-+
-+ .min_keysize = CHACHA_KEY_SIZE,
-+ .max_keysize = CHACHA_KEY_SIZE,
-+ .ivsize = CHACHA_IV_SIZE,
-+ .chunksize = CHACHA_BLOCK_SIZE,
-+ .setkey = chacha20_setkey,
-+ .encrypt = chacha_arm,
-+ .decrypt = chacha_arm,
-+ }, {
-+ .base.cra_name = "xchacha20",
-+ .base.cra_driver_name = "xchacha20-arm",
-+ .base.cra_priority = 200,
-+ .base.cra_blocksize = 1,
-+ .base.cra_ctxsize = sizeof(struct chacha_ctx),
-+ .base.cra_module = THIS_MODULE,
-+
-+ .min_keysize = CHACHA_KEY_SIZE,
-+ .max_keysize = CHACHA_KEY_SIZE,
-+ .ivsize = XCHACHA_IV_SIZE,
-+ .chunksize = CHACHA_BLOCK_SIZE,
-+ .setkey = chacha20_setkey,
-+ .encrypt = xchacha_arm,
-+ .decrypt = xchacha_arm,
-+ }, {
-+ .base.cra_name = "xchacha12",
-+ .base.cra_driver_name = "xchacha12-arm",
-+ .base.cra_priority = 200,
-+ .base.cra_blocksize = 1,
-+ .base.cra_ctxsize = sizeof(struct chacha_ctx),
-+ .base.cra_module = THIS_MODULE,
-+
-+ .min_keysize = CHACHA_KEY_SIZE,
-+ .max_keysize = CHACHA_KEY_SIZE,
-+ .ivsize = XCHACHA_IV_SIZE,
-+ .chunksize = CHACHA_BLOCK_SIZE,
-+ .setkey = chacha12_setkey,
-+ .encrypt = xchacha_arm,
-+ .decrypt = xchacha_arm,
-+ },
-+};
-+
-+static struct skcipher_alg neon_algs[] = {
-+ {
-+ .base.cra_name = "chacha20",
-+ .base.cra_driver_name = "chacha20-neon",
-+ .base.cra_priority = 300,
-+ .base.cra_blocksize = 1,
-+ .base.cra_ctxsize = sizeof(struct chacha_ctx),
-+ .base.cra_module = THIS_MODULE,
-+
-+ .min_keysize = CHACHA_KEY_SIZE,
-+ .max_keysize = CHACHA_KEY_SIZE,
-+ .ivsize = CHACHA_IV_SIZE,
-+ .chunksize = CHACHA_BLOCK_SIZE,
-+ .walksize = 4 * CHACHA_BLOCK_SIZE,
-+ .setkey = chacha20_setkey,
-+ .encrypt = chacha_neon,
-+ .decrypt = chacha_neon,
-+ }, {
-+ .base.cra_name = "xchacha20",
-+ .base.cra_driver_name = "xchacha20-neon",
-+ .base.cra_priority = 300,
-+ .base.cra_blocksize = 1,
-+ .base.cra_ctxsize = sizeof(struct chacha_ctx),
-+ .base.cra_module = THIS_MODULE,
-+
-+ .min_keysize = CHACHA_KEY_SIZE,
-+ .max_keysize = CHACHA_KEY_SIZE,
-+ .ivsize = XCHACHA_IV_SIZE,
-+ .chunksize = CHACHA_BLOCK_SIZE,
-+ .walksize = 4 * CHACHA_BLOCK_SIZE,
-+ .setkey = chacha20_setkey,
-+ .encrypt = xchacha_neon,
-+ .decrypt = xchacha_neon,
-+ }, {
-+ .base.cra_name = "xchacha12",
-+ .base.cra_driver_name = "xchacha12-neon",
-+ .base.cra_priority = 300,
-+ .base.cra_blocksize = 1,
-+ .base.cra_ctxsize = sizeof(struct chacha_ctx),
-+ .base.cra_module = THIS_MODULE,
-+
-+ .min_keysize = CHACHA_KEY_SIZE,
-+ .max_keysize = CHACHA_KEY_SIZE,
-+ .ivsize = XCHACHA_IV_SIZE,
-+ .chunksize = CHACHA_BLOCK_SIZE,
-+ .walksize = 4 * CHACHA_BLOCK_SIZE,
-+ .setkey = chacha12_setkey,
-+ .encrypt = xchacha_neon,
-+ .decrypt = xchacha_neon,
-+ }
-+};
-+
-+static int __init chacha_simd_mod_init(void)
-+{
-+ int err;
-+
-+ err = crypto_register_skciphers(arm_algs, ARRAY_SIZE(arm_algs));
-+ if (err)
-+ return err;
-+
-+ if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && (elf_hwcap & HWCAP_NEON)) {
-+ int i;
-+
-+ switch (read_cpuid_part()) {
-+ case ARM_CPU_PART_CORTEX_A7:
-+ case ARM_CPU_PART_CORTEX_A5:
-+ /*
-+ * The Cortex-A7 and Cortex-A5 do not perform well with
-+ * the NEON implementation but do incredibly with the
-+ * scalar one and use less power.
-+ */
-+ for (i = 0; i < ARRAY_SIZE(neon_algs); i++)
-+ neon_algs[i].base.cra_priority = 0;
-+ break;
-+ }
-+
-+ err = crypto_register_skciphers(neon_algs, ARRAY_SIZE(neon_algs));
-+ if (err)
-+ crypto_unregister_skciphers(arm_algs, ARRAY_SIZE(arm_algs));
-+ }
-+ return err;
-+}
-+
-+static void __exit chacha_simd_mod_fini(void)
-+{
-+ crypto_unregister_skciphers(arm_algs, ARRAY_SIZE(arm_algs));
-+ if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && (elf_hwcap & HWCAP_NEON))
-+ crypto_unregister_skciphers(neon_algs, ARRAY_SIZE(neon_algs));
-+}
-+
-+module_init(chacha_simd_mod_init);
-+module_exit(chacha_simd_mod_fini);
-+
-+MODULE_DESCRIPTION("ChaCha and XChaCha stream ciphers (scalar and NEON accelerated)");
-+MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
-+MODULE_LICENSE("GPL v2");
-+MODULE_ALIAS_CRYPTO("chacha20");
-+MODULE_ALIAS_CRYPTO("chacha20-arm");
-+MODULE_ALIAS_CRYPTO("xchacha20");
-+MODULE_ALIAS_CRYPTO("xchacha20-arm");
-+MODULE_ALIAS_CRYPTO("xchacha12");
-+MODULE_ALIAS_CRYPTO("xchacha12-arm");
-+#ifdef CONFIG_KERNEL_MODE_NEON
-+MODULE_ALIAS_CRYPTO("chacha20-neon");
-+MODULE_ALIAS_CRYPTO("xchacha20-neon");
-+MODULE_ALIAS_CRYPTO("xchacha12-neon");
-+#endif
---- a/arch/arm/crypto/chacha-neon-glue.c
-+++ /dev/null
-@@ -1,202 +0,0 @@
--/*
-- * ARM NEON accelerated ChaCha and XChaCha stream ciphers,
-- * including ChaCha20 (RFC7539)
-- *
-- * Copyright (C) 2016 Linaro, Ltd. <ard.biesheuvel@linaro.org>
-- *
-- * This program is free software; you can redistribute it and/or modify
-- * it under the terms of the GNU General Public License version 2 as
-- * published by the Free Software Foundation.
-- *
-- * Based on:
-- * ChaCha20 256-bit cipher algorithm, RFC7539, SIMD glue code
-- *
-- * Copyright (C) 2015 Martin Willi
-- *
-- * This program is free software; you can redistribute it and/or modify
-- * it under the terms of the GNU General Public License as published by
-- * the Free Software Foundation; either version 2 of the License, or
-- * (at your option) any later version.
-- */
--
--#include <crypto/algapi.h>
--#include <crypto/internal/chacha.h>
--#include <crypto/internal/simd.h>
--#include <crypto/internal/skcipher.h>
--#include <linux/kernel.h>
--#include <linux/module.h>
--
--#include <asm/hwcap.h>
--#include <asm/neon.h>
--#include <asm/simd.h>
--
--asmlinkage void chacha_block_xor_neon(const u32 *state, u8 *dst, const u8 *src,
-- int nrounds);
--asmlinkage void chacha_4block_xor_neon(const u32 *state, u8 *dst, const u8 *src,
-- int nrounds);
--asmlinkage void hchacha_block_neon(const u32 *state, u32 *out, int nrounds);
--
--static void chacha_doneon(u32 *state, u8 *dst, const u8 *src,
-- unsigned int bytes, int nrounds)
--{
-- u8 buf[CHACHA_BLOCK_SIZE];
--
-- while (bytes >= CHACHA_BLOCK_SIZE * 4) {
-- chacha_4block_xor_neon(state, dst, src, nrounds);
-- bytes -= CHACHA_BLOCK_SIZE * 4;
-- src += CHACHA_BLOCK_SIZE * 4;
-- dst += CHACHA_BLOCK_SIZE * 4;
-- state[12] += 4;
-- }
-- while (bytes >= CHACHA_BLOCK_SIZE) {
-- chacha_block_xor_neon(state, dst, src, nrounds);
-- bytes -= CHACHA_BLOCK_SIZE;
-- src += CHACHA_BLOCK_SIZE;
-- dst += CHACHA_BLOCK_SIZE;
-- state[12]++;
-- }
-- if (bytes) {
-- memcpy(buf, src, bytes);
-- chacha_block_xor_neon(state, buf, buf, nrounds);
-- memcpy(dst, buf, bytes);
-- }
--}
--
--static int chacha_neon_stream_xor(struct skcipher_request *req,
-- const struct chacha_ctx *ctx, const u8 *iv)
--{
-- struct skcipher_walk walk;
-- u32 state[16];
-- int err;
--
-- err = skcipher_walk_virt(&walk, req, false);
--
-- crypto_chacha_init(state, ctx, iv);
--
-- while (walk.nbytes > 0) {
-- unsigned int nbytes = walk.nbytes;
--
-- if (nbytes < walk.total)
-- nbytes = round_down(nbytes, walk.stride);
--
-- kernel_neon_begin();
-- chacha_doneon(state, walk.dst.virt.addr, walk.src.virt.addr,
-- nbytes, ctx->nrounds);
-- kernel_neon_end();
-- err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
-- }
--
-- return err;
--}
--
--static int chacha_neon(struct skcipher_request *req)
--{
-- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
-- struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
--
-- if (req->cryptlen <= CHACHA_BLOCK_SIZE || !crypto_simd_usable())
-- return crypto_chacha_crypt(req);
--
-- return chacha_neon_stream_xor(req, ctx, req->iv);
--}
--
--static int xchacha_neon(struct skcipher_request *req)
--{
-- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
-- struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
-- struct chacha_ctx subctx;
-- u32 state[16];
-- u8 real_iv[16];
--
-- if (req->cryptlen <= CHACHA_BLOCK_SIZE || !crypto_simd_usable())
-- return crypto_xchacha_crypt(req);
--
-- crypto_chacha_init(state, ctx, req->iv);
--
-- kernel_neon_begin();
-- hchacha_block_neon(state, subctx.key, ctx->nrounds);
-- kernel_neon_end();
-- subctx.nrounds = ctx->nrounds;
--
-- memcpy(&real_iv[0], req->iv + 24, 8);
-- memcpy(&real_iv[8], req->iv + 16, 8);
-- return chacha_neon_stream_xor(req, &subctx, real_iv);
--}
--
--static struct skcipher_alg algs[] = {
-- {
-- .base.cra_name = "chacha20",
-- .base.cra_driver_name = "chacha20-neon",
-- .base.cra_priority = 300,
-- .base.cra_blocksize = 1,
-- .base.cra_ctxsize = sizeof(struct chacha_ctx),
-- .base.cra_module = THIS_MODULE,
--
-- .min_keysize = CHACHA_KEY_SIZE,
-- .max_keysize = CHACHA_KEY_SIZE,
-- .ivsize = CHACHA_IV_SIZE,
-- .chunksize = CHACHA_BLOCK_SIZE,
-- .walksize = 4 * CHACHA_BLOCK_SIZE,
-- .setkey = crypto_chacha20_setkey,
-- .encrypt = chacha_neon,
-- .decrypt = chacha_neon,
-- }, {
-- .base.cra_name = "xchacha20",
-- .base.cra_driver_name = "xchacha20-neon",
-- .base.cra_priority = 300,
-- .base.cra_blocksize = 1,
-- .base.cra_ctxsize = sizeof(struct chacha_ctx),
-- .base.cra_module = THIS_MODULE,
--
-- .min_keysize = CHACHA_KEY_SIZE,
-- .max_keysize = CHACHA_KEY_SIZE,
-- .ivsize = XCHACHA_IV_SIZE,
-- .chunksize = CHACHA_BLOCK_SIZE,
-- .walksize = 4 * CHACHA_BLOCK_SIZE,
-- .setkey = crypto_chacha20_setkey,
-- .encrypt = xchacha_neon,
-- .decrypt = xchacha_neon,
-- }, {
-- .base.cra_name = "xchacha12",
-- .base.cra_driver_name = "xchacha12-neon",
-- .base.cra_priority = 300,
-- .base.cra_blocksize = 1,
-- .base.cra_ctxsize = sizeof(struct chacha_ctx),
-- .base.cra_module = THIS_MODULE,
--
-- .min_keysize = CHACHA_KEY_SIZE,
-- .max_keysize = CHACHA_KEY_SIZE,
-- .ivsize = XCHACHA_IV_SIZE,
-- .chunksize = CHACHA_BLOCK_SIZE,
-- .walksize = 4 * CHACHA_BLOCK_SIZE,
-- .setkey = crypto_chacha12_setkey,
-- .encrypt = xchacha_neon,
-- .decrypt = xchacha_neon,
-- }
--};
--
--static int __init chacha_simd_mod_init(void)
--{
-- if (!(elf_hwcap & HWCAP_NEON))
-- return -ENODEV;
--
-- return crypto_register_skciphers(algs, ARRAY_SIZE(algs));
--}
--
--static void __exit chacha_simd_mod_fini(void)
--{
-- crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
--}
--
--module_init(chacha_simd_mod_init);
--module_exit(chacha_simd_mod_fini);
--
--MODULE_DESCRIPTION("ChaCha and XChaCha stream ciphers (NEON accelerated)");
--MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
--MODULE_LICENSE("GPL v2");
--MODULE_ALIAS_CRYPTO("chacha20");
--MODULE_ALIAS_CRYPTO("chacha20-neon");
--MODULE_ALIAS_CRYPTO("xchacha20");
--MODULE_ALIAS_CRYPTO("xchacha20-neon");
--MODULE_ALIAS_CRYPTO("xchacha12");
--MODULE_ALIAS_CRYPTO("xchacha12-neon");
---- a/arch/arm/crypto/chacha-scalar-core.S
-+++ b/arch/arm/crypto/chacha-scalar-core.S
-@@ -41,14 +41,6 @@
- X14 .req r12
- X15 .req r14
-
--.Lexpand_32byte_k:
-- // "expand 32-byte k"
-- .word 0x61707865, 0x3320646e, 0x79622d32, 0x6b206574
--
--#ifdef __thumb2__
--# define adrl adr
--#endif
--
- .macro __rev out, in, t0, t1, t2
- .if __LINUX_ARM_ARCH__ >= 6
- rev \out, \in
-@@ -391,61 +383,65 @@
- .endm // _chacha
-
- /*
-- * void chacha20_arm(u8 *out, const u8 *in, size_t len, const u32 key[8],
-- * const u32 iv[4]);
-+ * void chacha_doarm(u8 *dst, const u8 *src, unsigned int bytes,
-+ * const u32 *state, int nrounds);
- */
--ENTRY(chacha20_arm)
-+ENTRY(chacha_doarm)
- cmp r2, #0 // len == 0?
- reteq lr
-
-+ ldr ip, [sp]
-+ cmp ip, #12
-+
- push {r0-r2,r4-r11,lr}
-
- // Push state x0-x15 onto stack.
- // Also store an extra copy of x10-x11 just before the state.
-
-- ldr r4, [sp, #48] // iv
-- mov r0, sp
-- sub sp, #80
--
-- // iv: x12-x15
-- ldm r4, {X12,X13,X14,X15}
-- stmdb r0!, {X12,X13,X14,X15}
-+ add X12, r3, #48
-+ ldm X12, {X12,X13,X14,X15}
-+ push {X12,X13,X14,X15}
-+ sub sp, sp, #64
-
-- // key: x4-x11
-- __ldrd X8_X10, X9_X11, r3, 24
-+ __ldrd X8_X10, X9_X11, r3, 40
- __strd X8_X10, X9_X11, sp, 8
-- stmdb r0!, {X8_X10, X9_X11}
-- ldm r3, {X4-X9_X11}
-- stmdb r0!, {X4-X9_X11}
--
-- // constants: x0-x3
-- adrl X3, .Lexpand_32byte_k
-- ldm X3, {X0-X3}
-+ __strd X8_X10, X9_X11, sp, 56
-+ ldm r3, {X0-X9_X11}
- __strd X0, X1, sp, 16
- __strd X2, X3, sp, 24
-+ __strd X4, X5, sp, 32
-+ __strd X6, X7, sp, 40
-+ __strd X8_X10, X9_X11, sp, 48
-
-+ beq 1f
- _chacha 20
-
-- add sp, #76
-+0: add sp, #76
- pop {r4-r11, pc}
--ENDPROC(chacha20_arm)
-+
-+1: _chacha 12
-+ b 0b
-+ENDPROC(chacha_doarm)
-
- /*
-- * void hchacha20_arm(const u32 state[16], u32 out[8]);
-+ * void hchacha_block_arm(const u32 state[16], u32 out[8], int nrounds);
- */
--ENTRY(hchacha20_arm)
-+ENTRY(hchacha_block_arm)
- push {r1,r4-r11,lr}
-
-+ cmp r2, #12 // ChaCha12 ?
-+
- mov r14, r0
- ldmia r14!, {r0-r11} // load x0-x11
- push {r10-r11} // store x10-x11 to stack
- ldm r14, {r10-r12,r14} // load x12-x15
- sub sp, #8
-
-+ beq 1f
- _chacha_permute 20
-
- // Skip over (unused0-unused1, x10-x11)
-- add sp, #16
-+0: add sp, #16
-
- // Fix up rotations of x12-x15
- ror X12, X12, #drot
-@@ -458,4 +454,7 @@ ENTRY(hchacha20_arm)
- stm r4, {X0,X1,X2,X3,X12,X13,X14,X15}
-
- pop {r4-r11,pc}
--ENDPROC(hchacha20_arm)
-+
-+1: _chacha_permute 12
-+ b 0b
-+ENDPROC(hchacha_block_arm)
---- a/arch/arm64/crypto/chacha-neon-glue.c
-+++ b/arch/arm64/crypto/chacha-neon-glue.c
-@@ -1,5 +1,5 @@
- /*
-- * ARM NEON accelerated ChaCha and XChaCha stream ciphers,
-+ * ARM NEON and scalar accelerated ChaCha and XChaCha stream ciphers,
- * including ChaCha20 (RFC7539)
- *
- * Copyright (C) 2016 - 2017 Linaro, Ltd. <ard.biesheuvel@linaro.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 08:11:06 +0000