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Diffstat (limited to 'arch/x86/lib/crypto/chacha_glue.c')
-rw-r--r--arch/x86/lib/crypto/chacha_glue.c196
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/x86/lib/crypto/chacha_glue.c b/arch/x86/lib/crypto/chacha_glue.c
deleted file mode 100644
index 10b2c945f541..000000000000
--- a/arch/x86/lib/crypto/chacha_glue.c
+++ /dev/null
@@ -1,196 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * ChaCha and HChaCha functions (x86_64 optimized)
- *
- * Copyright (C) 2015 Martin Willi
- */
-
-#include <asm/simd.h>
-#include <crypto/chacha.h>
-#include <linux/jump_label.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sizes.h>
-
-asmlinkage void chacha_block_xor_ssse3(const struct chacha_state *state,
- u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_4block_xor_ssse3(const struct chacha_state *state,
- u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void hchacha_block_ssse3(const struct chacha_state *state,
- u32 out[HCHACHA_OUT_WORDS], int nrounds);
-
-asmlinkage void chacha_2block_xor_avx2(const struct chacha_state *state,
- u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_4block_xor_avx2(const struct chacha_state *state,
- u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_8block_xor_avx2(const struct chacha_state *state,
- u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-
-asmlinkage void chacha_2block_xor_avx512vl(const struct chacha_state *state,
- u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_4block_xor_avx512vl(const struct chacha_state *state,
- u8 *dst, const u8 *src,
- unsigned int len, int nrounds);
-asmlinkage void chacha_8block_xor_avx512vl(const struct chacha_state *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(struct chacha_state *state, u8 *dst, const u8 *src,
- unsigned int bytes, int nrounds)
-{
- if (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->x[12] += 8;
- }
- if (bytes > CHACHA_BLOCK_SIZE * 4) {
- chacha_8block_xor_avx512vl(state, dst, src, bytes,
- nrounds);
- state->x[12] += chacha_advance(bytes, 8);
- return;
- }
- if (bytes > CHACHA_BLOCK_SIZE * 2) {
- chacha_4block_xor_avx512vl(state, dst, src, bytes,
- nrounds);
- state->x[12] += chacha_advance(bytes, 4);
- return;
- }
- if (bytes) {
- chacha_2block_xor_avx512vl(state, dst, src, bytes,
- nrounds);
- state->x[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->x[12] += 8;
- }
- if (bytes > CHACHA_BLOCK_SIZE * 4) {
- chacha_8block_xor_avx2(state, dst, src, bytes, nrounds);
- state->x[12] += chacha_advance(bytes, 8);
- return;
- }
- if (bytes > CHACHA_BLOCK_SIZE * 2) {
- chacha_4block_xor_avx2(state, dst, src, bytes, nrounds);
- state->x[12] += chacha_advance(bytes, 4);
- return;
- }
- if (bytes > CHACHA_BLOCK_SIZE) {
- chacha_2block_xor_avx2(state, dst, src, bytes, nrounds);
- state->x[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->x[12] += 4;
- }
- if (bytes > CHACHA_BLOCK_SIZE) {
- chacha_4block_xor_ssse3(state, dst, src, bytes, nrounds);
- state->x[12] += chacha_advance(bytes, 4);
- return;
- }
- if (bytes) {
- chacha_block_xor_ssse3(state, dst, src, bytes, nrounds);
- state->x[12]++;
- }
-}
-
-void hchacha_block_arch(const struct chacha_state *state,
- u32 out[HCHACHA_OUT_WORDS], int nrounds)
-{
- if (!static_branch_likely(&chacha_use_simd)) {
- hchacha_block_generic(state, out, nrounds);
- } else {
- kernel_fpu_begin();
- hchacha_block_ssse3(state, out, nrounds);
- kernel_fpu_end();
- }
-}
-EXPORT_SYMBOL(hchacha_block_arch);
-
-void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
- unsigned int bytes, int nrounds)
-{
- if (!static_branch_likely(&chacha_use_simd) ||
- 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);
-
-bool chacha_is_arch_optimized(void)
-{
- return static_key_enabled(&chacha_use_simd);
-}
-EXPORT_SYMBOL(chacha_is_arch_optimized);
-
-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 (boot_cpu_has(X86_FEATURE_AVX512VL) &&
- boot_cpu_has(X86_FEATURE_AVX512BW)) /* kmovq */
- static_branch_enable(&chacha_use_avx512vl);
- }
- return 0;
-}
-subsys_initcall(chacha_simd_mod_init);
-
-static void __exit chacha_simd_mod_exit(void)
-{
-}
-module_exit(chacha_simd_mod_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Martin Willi <martin@strongswan.org>");
-MODULE_DESCRIPTION("ChaCha and HChaCha functions (x86_64 optimized)");
generated by cgit (git 2.34.1) at 2025-07-29 18:32:03 +0000