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Diffstat (limited to 'arch/x86/crypto/chacha_glue.c')
-rw-r--r--arch/x86/crypto/chacha_glue.c311
1 files changed, 0 insertions, 311 deletions
diff --git a/arch/x86/crypto/chacha_glue.c b/arch/x86/crypto/chacha_glue.c
deleted file mode 100644
index 8bb74a272879..000000000000
--- a/arch/x86/crypto/chacha_glue.c
+++ /dev/null
@@ -1,311 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * x64 SIMD accelerated ChaCha and XChaCha stream ciphers,
- * including ChaCha20 (RFC7539)
- *
- * 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 <linux/sizes.h>
-#include <asm/simd.h>
-
-asmlinkage void chacha_block_xor_ssse3(u32 *state, u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_4block_xor_ssse3(u32 *state, u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void hchacha_block_ssse3(const u32 *state, u32 *out, int nrounds);
-
-asmlinkage void chacha_2block_xor_avx2(u32 *state, u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_4block_xor_avx2(u32 *state, u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_8block_xor_avx2(u32 *state, u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-
-asmlinkage void chacha_2block_xor_avx512vl(u32 *state, u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_4block_xor_avx512vl(u32 *state, u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_8block_xor_avx512vl(u32 *state, u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-
-static __ro_after_init DEFINE_STATIC_KEY_FALSE(chacha_use_simd);
-static __ro_after_init DEFINE_STATIC_KEY_FALSE(chacha_use_avx2);
-static __ro_after_init DEFINE_STATIC_KEY_FALSE(chacha_use_avx512vl);
-
-static unsigned int chacha_advance(unsigned int len, unsigned int maxblocks)
-{
- len = min(len, maxblocks * CHACHA_BLOCK_SIZE);
- return round_up(len, CHACHA_BLOCK_SIZE) / CHACHA_BLOCK_SIZE;
-}
-
-static void chacha_dosimd(u32 *state, u8 *dst, const u8 *src,
- unsigned int bytes, int nrounds)
-{
- if (IS_ENABLED(CONFIG_AS_AVX512) &&
- static_branch_likely(&chacha_use_avx512vl)) {
- while (bytes >= CHACHA_BLOCK_SIZE * 8) {
- chacha_8block_xor_avx512vl(state, dst, src, bytes,
- nrounds);
- bytes -= CHACHA_BLOCK_SIZE * 8;
- src += CHACHA_BLOCK_SIZE * 8;
- dst += CHACHA_BLOCK_SIZE * 8;
- state[12] += 8;
- }
- if (bytes > CHACHA_BLOCK_SIZE * 4) {
- chacha_8block_xor_avx512vl(state, dst, src, bytes,
- nrounds);
- state[12] += chacha_advance(bytes, 8);
- return;
- }
- if (bytes > CHACHA_BLOCK_SIZE * 2) {
- chacha_4block_xor_avx512vl(state, dst, src, bytes,
- nrounds);
- state[12] += chacha_advance(bytes, 4);
- return;
- }
- if (bytes) {
- chacha_2block_xor_avx512vl(state, dst, src, bytes,
- nrounds);
- state[12] += chacha_advance(bytes, 2);
- return;
- }
- }
-
- if (static_branch_likely(&chacha_use_avx2)) {
- while (bytes >= CHACHA_BLOCK_SIZE * 8) {
- chacha_8block_xor_avx2(state, dst, src, bytes, nrounds);
- bytes -= CHACHA_BLOCK_SIZE * 8;
- src += CHACHA_BLOCK_SIZE * 8;
- dst += CHACHA_BLOCK_SIZE * 8;
- state[12] += 8;
- }
- if (bytes > CHACHA_BLOCK_SIZE * 4) {
- chacha_8block_xor_avx2(state, dst, src, bytes, nrounds);
- state[12] += chacha_advance(bytes, 8);
- return;
- }
- if (bytes > CHACHA_BLOCK_SIZE * 2) {
- chacha_4block_xor_avx2(state, dst, src, bytes, nrounds);
- state[12] += chacha_advance(bytes, 4);
- return;
- }
- if (bytes > CHACHA_BLOCK_SIZE) {
- chacha_2block_xor_avx2(state, dst, src, bytes, nrounds);
- state[12] += chacha_advance(bytes, 2);
- return;
- }
- }
-
- while (bytes >= CHACHA_BLOCK_SIZE * 4) {
- chacha_4block_xor_ssse3(state, dst, src, bytes, nrounds);
- bytes -= CHACHA_BLOCK_SIZE * 4;
- src += CHACHA_BLOCK_SIZE * 4;
- dst += CHACHA_BLOCK_SIZE * 4;
- state[12] += 4;
- }
- if (bytes > CHACHA_BLOCK_SIZE) {
- chacha_4block_xor_ssse3(state, dst, src, bytes, nrounds);
- state[12] += chacha_advance(bytes, 4);
- return;
- }
- if (bytes) {
- chacha_block_xor_ssse3(state, dst, src, bytes, nrounds);
- state[12]++;
- }
-}
-
-void hchacha_block_arch(const u32 *state, u32 *stream, int nrounds)
-{
- if (!static_branch_likely(&chacha_use_simd) || !crypto_simd_usable()) {
- hchacha_block_generic(state, stream, nrounds);
- } else {
- kernel_fpu_begin();
- hchacha_block_ssse3(state, stream, nrounds);
- kernel_fpu_end();
- }
-}
-EXPORT_SYMBOL(hchacha_block_arch);
-
-void chacha_crypt_arch(u32 *state, u8 *dst, const u8 *src, unsigned int bytes,
- int nrounds)
-{
- if (!static_branch_likely(&chacha_use_simd) || !crypto_simd_usable() ||
- bytes <= CHACHA_BLOCK_SIZE)
- return chacha_crypt_generic(state, dst, src, bytes, nrounds);
-
- do {
- unsigned int todo = min_t(unsigned int, bytes, SZ_4K);
-
- kernel_fpu_begin();
- chacha_dosimd(state, dst, src, todo, nrounds);
- kernel_fpu_end();
-
- bytes -= todo;
- src += todo;
- dst += todo;
- } while (bytes);
-}
-EXPORT_SYMBOL(chacha_crypt_arch);
-
-static int chacha_simd_stream_xor(struct skcipher_request *req,
- const struct chacha_ctx *ctx, const u8 *iv)
-{
- u32 state[CHACHA_STATE_WORDS] __aligned(8);
- struct skcipher_walk walk;
- int err;
-
- err = skcipher_walk_virt(&walk, req, false);
-
- chacha_init(state, ctx->key, iv);
-
- while (walk.nbytes > 0) {
- unsigned int nbytes = walk.nbytes;
-
- if (nbytes < walk.total)
- nbytes = round_down(nbytes, walk.stride);
-
- if (!static_branch_likely(&chacha_use_simd) ||
- !crypto_simd_usable()) {
- chacha_crypt_generic(state, walk.dst.virt.addr,
- walk.src.virt.addr, nbytes,
- ctx->nrounds);
- } else {
- kernel_fpu_begin();
- chacha_dosimd(state, walk.dst.virt.addr,
- walk.src.virt.addr, nbytes,
- ctx->nrounds);
- kernel_fpu_end();
- }
- err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
- }
-
- return err;
-}
-
-static int chacha_simd(struct skcipher_request *req)
-{
- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
-
- return chacha_simd_stream_xor(req, ctx, req->iv);
-}
-
-static int xchacha_simd(struct skcipher_request *req)
-{
- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
- u32 state[CHACHA_STATE_WORDS] __aligned(8);
- struct chacha_ctx subctx;
- u8 real_iv[16];
-
- chacha_init(state, ctx->key, req->iv);
-
- if (req->cryptlen > CHACHA_BLOCK_SIZE && crypto_simd_usable()) {
- kernel_fpu_begin();
- hchacha_block_ssse3(state, subctx.key, ctx->nrounds);
- kernel_fpu_end();
- } else {
- hchacha_block_generic(state, subctx.key, ctx->nrounds);
- }
- subctx.nrounds = ctx->nrounds;
-
- memcpy(&real_iv[0], req->iv + 24, 8);
- memcpy(&real_iv[8], req->iv + 16, 8);
- return chacha_simd_stream_xor(req, &subctx, real_iv);
-}
-
-static struct skcipher_alg algs[] = {
- {
- .base.cra_name = "chacha20",
- .base.cra_driver_name = "chacha20-simd",
- .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,
- .setkey = chacha20_setkey,
- .encrypt = chacha_simd,
- .decrypt = chacha_simd,
- }, {
- .base.cra_name = "xchacha20",
- .base.cra_driver_name = "xchacha20-simd",
- .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,
- .setkey = chacha20_setkey,
- .encrypt = xchacha_simd,
- .decrypt = xchacha_simd,
- }, {
- .base.cra_name = "xchacha12",
- .base.cra_driver_name = "xchacha12-simd",
- .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,
- .setkey = chacha12_setkey,
- .encrypt = xchacha_simd,
- .decrypt = xchacha_simd,
- },
-};
-
-static int __init chacha_simd_mod_init(void)
-{
- if (!boot_cpu_has(X86_FEATURE_SSSE3))
- return 0;
-
- static_branch_enable(&chacha_use_simd);
-
- if (boot_cpu_has(X86_FEATURE_AVX) &&
- boot_cpu_has(X86_FEATURE_AVX2) &&
- cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
- static_branch_enable(&chacha_use_avx2);
-
- if (IS_ENABLED(CONFIG_AS_AVX512) &&
- boot_cpu_has(X86_FEATURE_AVX512VL) &&
- boot_cpu_has(X86_FEATURE_AVX512BW)) /* kmovq */
- static_branch_enable(&chacha_use_avx512vl);
- }
- return IS_REACHABLE(CONFIG_CRYPTO_SKCIPHER) ?
- crypto_register_skciphers(algs, ARRAY_SIZE(algs)) : 0;
-}
-
-static void __exit chacha_simd_mod_fini(void)
-{
- if (IS_REACHABLE(CONFIG_CRYPTO_SKCIPHER) && boot_cpu_has(X86_FEATURE_SSSE3))
- crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
-}
-
-module_init(chacha_simd_mod_init);
-module_exit(chacha_simd_mod_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Martin Willi <martin@strongswan.org>");
-MODULE_DESCRIPTION("ChaCha and XChaCha stream ciphers (x64 SIMD accelerated)");
-MODULE_ALIAS_CRYPTO("chacha20");
-MODULE_ALIAS_CRYPTO("chacha20-simd");
-MODULE_ALIAS_CRYPTO("xchacha20");
-MODULE_ALIAS_CRYPTO("xchacha20-simd");
-MODULE_ALIAS_CRYPTO("xchacha12");
-MODULE_ALIAS_CRYPTO("xchacha12-simd");
generated by cgit (git 2.34.1) at 2025-05-29 21:15:27 +0000