+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Cryptographic API.
- *
- * Glue code for the SHA1 Secure Hash Algorithm assembler implementations
- * using SSSE3, AVX, AVX2, and SHA-NI instructions.
- *
- * This file is based on sha1_generic.c
- *
- * Copyright (c) Alan Smithee.
- * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
- * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
- * Copyright (c) Mathias Krause <minipli@googlemail.com>
- * Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <asm/cpu_device_id.h>
-#include <asm/simd.h>
-#include <crypto/internal/hash.h>
-#include <crypto/sha1.h>
-#include <crypto/sha1_base.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-
-static const struct x86_cpu_id module_cpu_ids[] = {
- X86_MATCH_FEATURE(X86_FEATURE_SHA_NI, NULL),
- X86_MATCH_FEATURE(X86_FEATURE_AVX2, NULL),
- X86_MATCH_FEATURE(X86_FEATURE_AVX, NULL),
- X86_MATCH_FEATURE(X86_FEATURE_SSSE3, NULL),
- {}
-};
-MODULE_DEVICE_TABLE(x86cpu, module_cpu_ids);
-
-static inline int sha1_update_x86(struct shash_desc *desc, const u8 *data,
- unsigned int len, sha1_block_fn *sha1_xform)
-{
- int remain;
-
- /*
- * Make sure struct sha1_state begins directly with the SHA1
- * 160-bit internal state, as this is what the asm functions expect.
- */
- BUILD_BUG_ON(offsetof(struct sha1_state, state) != 0);
-
- kernel_fpu_begin();
- remain = sha1_base_do_update_blocks(desc, data, len, sha1_xform);
- kernel_fpu_end();
-
- return remain;
-}
-
-static inline int sha1_finup(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *out,
- sha1_block_fn *sha1_xform)
-{
- kernel_fpu_begin();
- sha1_base_do_finup(desc, data, len, sha1_xform);
- kernel_fpu_end();
-
- return sha1_base_finish(desc, out);
-}
-
-asmlinkage void sha1_transform_ssse3(struct sha1_state *state,
- const u8 *data, int blocks);
-
-static int sha1_ssse3_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
-{
- return sha1_update_x86(desc, data, len, sha1_transform_ssse3);
-}
-
-static int sha1_ssse3_finup(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *out)
-{
- return sha1_finup(desc, data, len, out, sha1_transform_ssse3);
-}
-
-static struct shash_alg sha1_ssse3_alg = {
- .digestsize = SHA1_DIGEST_SIZE,
- .init = sha1_base_init,
- .update = sha1_ssse3_update,
- .finup = sha1_ssse3_finup,
- .descsize = SHA1_STATE_SIZE,
- .base = {
- .cra_name = "sha1",
- .cra_driver_name = "sha1-ssse3",
- .cra_priority = 150,
- .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
- .cra_blocksize = SHA1_BLOCK_SIZE,
- .cra_module = THIS_MODULE,
- }
-};
-
-static int register_sha1_ssse3(void)
-{
- if (boot_cpu_has(X86_FEATURE_SSSE3))
- return crypto_register_shash(&sha1_ssse3_alg);
- return 0;
-}
-
-static void unregister_sha1_ssse3(void)
-{
- if (boot_cpu_has(X86_FEATURE_SSSE3))
- crypto_unregister_shash(&sha1_ssse3_alg);
-}
-
-asmlinkage void sha1_transform_avx(struct sha1_state *state,
- const u8 *data, int blocks);
-
-static int sha1_avx_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
-{
- return sha1_update_x86(desc, data, len, sha1_transform_avx);
-}
-
-static int sha1_avx_finup(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *out)
-{
- return sha1_finup(desc, data, len, out, sha1_transform_avx);
-}
-
-static struct shash_alg sha1_avx_alg = {
- .digestsize = SHA1_DIGEST_SIZE,
- .init = sha1_base_init,
- .update = sha1_avx_update,
- .finup = sha1_avx_finup,
- .descsize = SHA1_STATE_SIZE,
- .base = {
- .cra_name = "sha1",
- .cra_driver_name = "sha1-avx",
- .cra_priority = 160,
- .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
- .cra_blocksize = SHA1_BLOCK_SIZE,
- .cra_module = THIS_MODULE,
- }
-};
-
-static bool avx_usable(void)
-{
- if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
- if (boot_cpu_has(X86_FEATURE_AVX))
- pr_info("AVX detected but unusable.\n");
- return false;
- }
-
- return true;
-}
-
-static int register_sha1_avx(void)
-{
- if (avx_usable())
- return crypto_register_shash(&sha1_avx_alg);
- return 0;
-}
-
-static void unregister_sha1_avx(void)
-{
- if (avx_usable())
- crypto_unregister_shash(&sha1_avx_alg);
-}
-
-#define SHA1_AVX2_BLOCK_OPTSIZE 4 /* optimal 4*64 bytes of SHA1 blocks */
-
-asmlinkage void sha1_transform_avx2(struct sha1_state *state,
- const u8 *data, int blocks);
-
-static bool avx2_usable(void)
-{
- if (avx_usable() && boot_cpu_has(X86_FEATURE_AVX2)
- && boot_cpu_has(X86_FEATURE_BMI1)
- && boot_cpu_has(X86_FEATURE_BMI2))
- return true;
-
- return false;
-}
-
-static inline void sha1_apply_transform_avx2(struct sha1_state *state,
- const u8 *data, int blocks)
-{
- /* Select the optimal transform based on data block size */
- if (blocks >= SHA1_AVX2_BLOCK_OPTSIZE)
- sha1_transform_avx2(state, data, blocks);
- else
- sha1_transform_avx(state, data, blocks);
-}
-
-static int sha1_avx2_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
-{
- return sha1_update_x86(desc, data, len, sha1_apply_transform_avx2);
-}
-
-static int sha1_avx2_finup(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *out)
-{
- return sha1_finup(desc, data, len, out, sha1_apply_transform_avx2);
-}
-
-static struct shash_alg sha1_avx2_alg = {
- .digestsize = SHA1_DIGEST_SIZE,
- .init = sha1_base_init,
- .update = sha1_avx2_update,
- .finup = sha1_avx2_finup,
- .descsize = SHA1_STATE_SIZE,
- .base = {
- .cra_name = "sha1",
- .cra_driver_name = "sha1-avx2",
- .cra_priority = 170,
- .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
- .cra_blocksize = SHA1_BLOCK_SIZE,
- .cra_module = THIS_MODULE,
- }
-};
-
-static int register_sha1_avx2(void)
-{
- if (avx2_usable())
- return crypto_register_shash(&sha1_avx2_alg);
- return 0;
-}
-
-static void unregister_sha1_avx2(void)
-{
- if (avx2_usable())
- crypto_unregister_shash(&sha1_avx2_alg);
-}
-
-asmlinkage void sha1_ni_transform(struct sha1_state *digest, const u8 *data,
- int rounds);
-
-static int sha1_ni_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
-{
- return sha1_update_x86(desc, data, len, sha1_ni_transform);
-}
-
-static int sha1_ni_finup(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *out)
-{
- return sha1_finup(desc, data, len, out, sha1_ni_transform);
-}
-
-static struct shash_alg sha1_ni_alg = {
- .digestsize = SHA1_DIGEST_SIZE,
- .init = sha1_base_init,
- .update = sha1_ni_update,
- .finup = sha1_ni_finup,
- .descsize = SHA1_STATE_SIZE,
- .base = {
- .cra_name = "sha1",
- .cra_driver_name = "sha1-ni",
- .cra_priority = 250,
- .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
- .cra_blocksize = SHA1_BLOCK_SIZE,
- .cra_module = THIS_MODULE,
- }
-};
-
-static int register_sha1_ni(void)
-{
- if (boot_cpu_has(X86_FEATURE_SHA_NI))
- return crypto_register_shash(&sha1_ni_alg);
- return 0;
-}
-
-static void unregister_sha1_ni(void)
-{
- if (boot_cpu_has(X86_FEATURE_SHA_NI))
- crypto_unregister_shash(&sha1_ni_alg);
-}
-
-static int __init sha1_ssse3_mod_init(void)
-{
- if (!x86_match_cpu(module_cpu_ids))
- return -ENODEV;
-
- if (register_sha1_ssse3())
- goto fail;
-
- if (register_sha1_avx()) {
- unregister_sha1_ssse3();
- goto fail;
- }
-
- if (register_sha1_avx2()) {
- unregister_sha1_avx();
- unregister_sha1_ssse3();
- goto fail;
- }
-
- if (register_sha1_ni()) {
- unregister_sha1_avx2();
- unregister_sha1_avx();
- unregister_sha1_ssse3();
- goto fail;
- }
-
- return 0;
-fail:
- return -ENODEV;
-}
-
-static void __exit sha1_ssse3_mod_fini(void)
-{
- unregister_sha1_ni();
- unregister_sha1_avx2();
- unregister_sha1_avx();
- unregister_sha1_ssse3();
-}
-
-module_init(sha1_ssse3_mod_init);
-module_exit(sha1_ssse3_mod_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, Supplemental SSE3 accelerated");
-
-MODULE_ALIAS_CRYPTO("sha1");
-MODULE_ALIAS_CRYPTO("sha1-ssse3");
-MODULE_ALIAS_CRYPTO("sha1-avx");
-MODULE_ALIAS_CRYPTO("sha1-avx2");
-MODULE_ALIAS_CRYPTO("sha1-ni");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * SHA-1 optimized for x86_64
+ *
+ * Copyright 2025 Google LLC
+ */
+#include <asm/fpu/api.h>
+#include <linux/static_call.h>
+
+DEFINE_STATIC_CALL(sha1_blocks_x86, sha1_blocks_generic);
+
+#define DEFINE_X86_SHA1_FN(c_fn, asm_fn) \
+ asmlinkage void asm_fn(struct sha1_block_state *state, \
+ const u8 *data, size_t nblocks); \
+ static void c_fn(struct sha1_block_state *state, \
+ const u8 *data, size_t nblocks) \
+ { \
+ if (likely(irq_fpu_usable())) { \
+ kernel_fpu_begin(); \
+ asm_fn(state, data, nblocks); \
+ kernel_fpu_end(); \
+ } else { \
+ sha1_blocks_generic(state, data, nblocks); \
+ } \
+ }
+
+DEFINE_X86_SHA1_FN(sha1_blocks_ssse3, sha1_transform_ssse3);
+DEFINE_X86_SHA1_FN(sha1_blocks_avx, sha1_transform_avx);
+DEFINE_X86_SHA1_FN(sha1_blocks_ni, sha1_ni_transform);
+
+#define SHA1_AVX2_BLOCK_OPTSIZE 4 /* optimal 4*64 bytes of SHA1 blocks */
+
+asmlinkage void sha1_transform_avx2(struct sha1_block_state *state,
+ const u8 *data, size_t nblocks);
+static void sha1_blocks_avx2(struct sha1_block_state *state,
+ const u8 *data, size_t nblocks)
+{
+ if (likely(irq_fpu_usable())) {
+ kernel_fpu_begin();
+ /* Select the optimal transform based on the number of blocks */
+ if (nblocks >= SHA1_AVX2_BLOCK_OPTSIZE)
+ sha1_transform_avx2(state, data, nblocks);
+ else
+ sha1_transform_avx(state, data, nblocks);
+ kernel_fpu_end();
+ } else {
+ sha1_blocks_generic(state, data, nblocks);
+ }
+}
+
+static void sha1_blocks(struct sha1_block_state *state,
+ const u8 *data, size_t nblocks)
+{
+ static_call(sha1_blocks_x86)(state, data, nblocks);
+}
+
+#define sha1_mod_init_arch sha1_mod_init_arch
+static inline void sha1_mod_init_arch(void)
+{
+ if (boot_cpu_has(X86_FEATURE_SHA_NI)) {
+ static_call_update(sha1_blocks_x86, sha1_blocks_ni);
+ } else if (cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
+ NULL) &&
+ boot_cpu_has(X86_FEATURE_AVX)) {
+ if (boot_cpu_has(X86_FEATURE_AVX2) &&
+ boot_cpu_has(X86_FEATURE_BMI1) &&
+ boot_cpu_has(X86_FEATURE_BMI2))
+ static_call_update(sha1_blocks_x86, sha1_blocks_avx2);
+ else
+ static_call_update(sha1_blocks_x86, sha1_blocks_avx);
+ } else if (boot_cpu_has(X86_FEATURE_SSSE3)) {
+ static_call_update(sha1_blocks_x86, sha1_blocks_ssse3);
+ }
+}
projects / thirdparty / linux.git / commitdiff
