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5
6#include <crypto/internal/blake2s.h>
7#include <crypto/internal/simd.h>
8#include <crypto/internal/hash.h>
9
10#include <linux/types.h>
11#include <linux/jump_label.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/sizes.h>
15
16#include <asm/cpufeature.h>
17#include <asm/fpu/api.h>
18#include <asm/processor.h>
19#include <asm/simd.h>
20
21asmlinkage void blake2s_compress_ssse3(struct blake2s_state *state,
22 const u8 *block, const size_t nblocks,
23 const u32 inc);
24asmlinkage void blake2s_compress_avx512(struct blake2s_state *state,
25 const u8 *block, const size_t nblocks,
26 const u32 inc);
27
28static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3);
29static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512);
30
31void blake2s_compress_arch(struct blake2s_state *state,
32 const u8 *block, size_t nblocks,
33 const u32 inc)
34{
35
36 BUILD_BUG_ON(SZ_4K / BLAKE2S_BLOCK_SIZE < 8);
37
38 if (!static_branch_likely(&blake2s_use_ssse3) || !crypto_simd_usable()) {
39 blake2s_compress_generic(state, block, nblocks, inc);
40 return;
41 }
42
43 do {
44 const size_t blocks = min_t(size_t, nblocks,
45 SZ_4K / BLAKE2S_BLOCK_SIZE);
46
47 kernel_fpu_begin();
48 if (IS_ENABLED(CONFIG_AS_AVX512) &&
49 static_branch_likely(&blake2s_use_avx512))
50 blake2s_compress_avx512(state, block, blocks, inc);
51 else
52 blake2s_compress_ssse3(state, block, blocks, inc);
53 kernel_fpu_end();
54
55 nblocks -= blocks;
56 block += blocks * BLAKE2S_BLOCK_SIZE;
57 } while (nblocks);
58}
59EXPORT_SYMBOL(blake2s_compress_arch);
60
61static int crypto_blake2s_update_x86(struct shash_desc *desc,
62 const u8 *in, unsigned int inlen)
63{
64 return crypto_blake2s_update(desc, in, inlen, blake2s_compress_arch);
65}
66
67static int crypto_blake2s_final_x86(struct shash_desc *desc, u8 *out)
68{
69 return crypto_blake2s_final(desc, out, blake2s_compress_arch);
70}
71
72#define BLAKE2S_ALG(name, driver_name, digest_size) \
73 { \
74 .base.cra_name = name, \
75 .base.cra_driver_name = driver_name, \
76 .base.cra_priority = 200, \
77 .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, \
78 .base.cra_blocksize = BLAKE2S_BLOCK_SIZE, \
79 .base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx), \
80 .base.cra_module = THIS_MODULE, \
81 .digestsize = digest_size, \
82 .setkey = crypto_blake2s_setkey, \
83 .init = crypto_blake2s_init, \
84 .update = crypto_blake2s_update_x86, \
85 .final = crypto_blake2s_final_x86, \
86 .descsize = sizeof(struct blake2s_state), \
87 }
88
89static struct shash_alg blake2s_algs[] = {
90 BLAKE2S_ALG("blake2s-128", "blake2s-128-x86", BLAKE2S_128_HASH_SIZE),
91 BLAKE2S_ALG("blake2s-160", "blake2s-160-x86", BLAKE2S_160_HASH_SIZE),
92 BLAKE2S_ALG("blake2s-224", "blake2s-224-x86", BLAKE2S_224_HASH_SIZE),
93 BLAKE2S_ALG("blake2s-256", "blake2s-256-x86", BLAKE2S_256_HASH_SIZE),
94};
95
96static int __init blake2s_mod_init(void)
97{
98 if (!boot_cpu_has(X86_FEATURE_SSSE3))
99 return 0;
100
101 static_branch_enable(&blake2s_use_ssse3);
102
103 if (IS_ENABLED(CONFIG_AS_AVX512) &&
104 boot_cpu_has(X86_FEATURE_AVX) &&
105 boot_cpu_has(X86_FEATURE_AVX2) &&
106 boot_cpu_has(X86_FEATURE_AVX512F) &&
107 boot_cpu_has(X86_FEATURE_AVX512VL) &&
108 cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
109 XFEATURE_MASK_AVX512, NULL))
110 static_branch_enable(&blake2s_use_avx512);
111
112 return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
113 crypto_register_shashes(blake2s_algs,
114 ARRAY_SIZE(blake2s_algs)) : 0;
115}
116
117static void __exit blake2s_mod_exit(void)
118{
119 if (IS_REACHABLE(CONFIG_CRYPTO_HASH) && boot_cpu_has(X86_FEATURE_SSSE3))
120 crypto_unregister_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
121}
122
123module_init(blake2s_mod_init);
124module_exit(blake2s_mod_exit);
125
126MODULE_ALIAS_CRYPTO("blake2s-128");
127MODULE_ALIAS_CRYPTO("blake2s-128-x86");
128MODULE_ALIAS_CRYPTO("blake2s-160");
129MODULE_ALIAS_CRYPTO("blake2s-160-x86");
130MODULE_ALIAS_CRYPTO("blake2s-224");
131MODULE_ALIAS_CRYPTO("blake2s-224-x86");
132MODULE_ALIAS_CRYPTO("blake2s-256");
133MODULE_ALIAS_CRYPTO("blake2s-256-x86");
134MODULE_LICENSE("GPL v2");
135
