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-rw-r--r--arch/sparc/crypto/Makefile7
-rw-r--r--arch/sparc/crypto/sha1_asm.S72
-rw-r--r--arch/sparc/crypto/sha1_glue.c181
3 files changed, 260 insertions, 0 deletions
diff --git a/arch/sparc/crypto/Makefile b/arch/sparc/crypto/Makefile
new file mode 100644
index 000000000000..9760472fe32b
--- /dev/null
+++ b/arch/sparc/crypto/Makefile
@@ -0,0 +1,7 @@
1#
2# Arch-specific CryptoAPI modules.
3#
4
5obj-$(CONFIG_CRYPTO_SHA1_SPARC64) += sha1-sparc64.o
6
7sha1-sparc64-y := sha1_asm.o sha1_glue.o
diff --git a/arch/sparc/crypto/sha1_asm.S b/arch/sparc/crypto/sha1_asm.S
new file mode 100644
index 000000000000..d2147eb054c1
--- /dev/null
+++ b/arch/sparc/crypto/sha1_asm.S
@@ -0,0 +1,72 @@
1#include <linux/linkage.h>
2#include <asm/visasm.h>
3
4ENTRY(sha1_sparc64_transform)
5 /* %o0 = digest, %o1 = data, %o2 = rounds */
6 VISEntryHalf
7 ld [%o0 + 0x00], %f0
8 ld [%o0 + 0x04], %f1
9 ld [%o0 + 0x08], %f2
10 andcc %o1, 0x7, %g0
11 ld [%o0 + 0x0c], %f3
12 bne,pn %xcc, 10f
13 ld [%o0 + 0x10], %f4
14
151:
16 ldd [%o1 + 0x00], %f8
17 ldd [%o1 + 0x08], %f10
18 ldd [%o1 + 0x10], %f12
19 ldd [%o1 + 0x18], %f14
20 ldd [%o1 + 0x20], %f16
21 ldd [%o1 + 0x28], %f18
22 ldd [%o1 + 0x30], %f20
23 ldd [%o1 + 0x38], %f22
24
25 /* sha1 */
26 .word 0x81b02820
27
28 subcc %o2, 1, %o2
29 bne,pt %xcc, 1b
30 add %o1, 0x40, %o1
31
325:
33 st %f0, [%o0 + 0x00]
34 st %f1, [%o0 + 0x04]
35 st %f2, [%o0 + 0x08]
36 st %f3, [%o0 + 0x0c]
37 st %f4, [%o0 + 0x10]
38 retl
39 VISExitHalf
4010:
41 alignaddr %o1, %g0, %o1
42
43 ldd [%o1 + 0x00], %f10
441:
45 ldd [%o1 + 0x08], %f12
46 ldd [%o1 + 0x10], %f14
47 ldd [%o1 + 0x18], %f16
48 ldd [%o1 + 0x20], %f18
49 ldd [%o1 + 0x28], %f20
50 ldd [%o1 + 0x30], %f22
51 ldd [%o1 + 0x38], %f24
52 ldd [%o1 + 0x40], %f26
53
54 faligndata %f10, %f12, %f8
55 faligndata %f12, %f14, %f10
56 faligndata %f14, %f16, %f12
57 faligndata %f16, %f18, %f14
58 faligndata %f18, %f20, %f16
59 faligndata %f20, %f22, %f18
60 faligndata %f22, %f24, %f20
61 faligndata %f24, %f26, %f22
62
63 /* sha1 */
64 .word 0x81b02820
65
66 subcc %o2, 1, %o2
67 fsrc1 %f26, %f10
68 bne,pt %xcc, 1b
69 add %o1, 0x40, %o1
70
71 ba,a,pt %xcc, 5b
72ENDPROC(sha1_sparc64_transform)
diff --git a/arch/sparc/crypto/sha1_glue.c b/arch/sparc/crypto/sha1_glue.c
new file mode 100644
index 000000000000..6bd1abc5489d
--- /dev/null
+++ b/arch/sparc/crypto/sha1_glue.c
@@ -0,0 +1,181 @@
1/* Glue code for SHA1 hashing optimized for sparc64 crypto opcodes.
2 *
3 * This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
4 *
5 * Copyright (c) Alan Smithee.
6 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
7 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
8 * Copyright (c) Mathias Krause <minipli@googlemail.com>
9 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <crypto/internal/hash.h>
14#include <linux/init.h>
15#include <linux/module.h>
16#include <linux/mm.h>
17#include <linux/cryptohash.h>
18#include <linux/types.h>
19#include <crypto/sha.h>
20
21#include <asm/pstate.h>
22#include <asm/elf.h>
23
24asmlinkage void sha1_sparc64_transform(u32 *digest, const char *data,
25 unsigned int rounds);
26
27static int sha1_sparc64_init(struct shash_desc *desc)
28{
29 struct sha1_state *sctx = shash_desc_ctx(desc);
30
31 *sctx = (struct sha1_state){
32 .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
33 };
34
35 return 0;
36}
37
38static void __sha1_sparc64_update(struct sha1_state *sctx, const u8 *data,
39 unsigned int len, unsigned int partial)
40{
41 unsigned int done = 0;
42
43 sctx->count += len;
44 if (partial) {
45 done = SHA1_BLOCK_SIZE - partial;
46 memcpy(sctx->buffer + partial, data, done);
47 sha1_sparc64_transform(sctx->state, sctx->buffer, 1);
48 }
49 if (len - done >= SHA1_BLOCK_SIZE) {
50 const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
51
52 sha1_sparc64_transform(sctx->state, data + done, rounds);
53 done += rounds * SHA1_BLOCK_SIZE;
54 }
55
56 memcpy(sctx->buffer, data + done, len - done);
57}
58
59static int sha1_sparc64_update(struct shash_desc *desc, const u8 *data,
60 unsigned int len)
61{
62 struct sha1_state *sctx = shash_desc_ctx(desc);
63 unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
64
65 /* Handle the fast case right here */
66 if (partial + len < SHA1_BLOCK_SIZE) {
67 sctx->count += len;
68 memcpy(sctx->buffer + partial, data, len);
69 } else
70 __sha1_sparc64_update(sctx, data, len, partial);
71
72 return 0;
73}
74
75/* Add padding and return the message digest. */
76static int sha1_sparc64_final(struct shash_desc *desc, u8 *out)
77{
78 struct sha1_state *sctx = shash_desc_ctx(desc);
79 unsigned int i, index, padlen;
80 __be32 *dst = (__be32 *)out;
81 __be64 bits;
82 static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
83
84 bits = cpu_to_be64(sctx->count << 3);
85
86 /* Pad out to 56 mod 64 and append length */
87 index = sctx->count % SHA1_BLOCK_SIZE;
88 padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);
89
90 /* We need to fill a whole block for __sha1_sparc64_update() */
91 if (padlen <= 56) {
92 sctx->count += padlen;
93 memcpy(sctx->buffer + index, padding, padlen);
94 } else {
95 __sha1_sparc64_update(sctx, padding, padlen, index);
96 }
97 __sha1_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
98
99 /* Store state in digest */
100 for (i = 0; i < 5; i++)
101 dst[i] = cpu_to_be32(sctx->state[i]);
102
103 /* Wipe context */
104 memset(sctx, 0, sizeof(*sctx));
105
106 return 0;
107}
108
109static int sha1_sparc64_export(struct shash_desc *desc, void *out)
110{
111 struct sha1_state *sctx = shash_desc_ctx(desc);
112
113 memcpy(out, sctx, sizeof(*sctx));
114
115 return 0;
116}
117
118static int sha1_sparc64_import(struct shash_desc *desc, const void *in)
119{
120 struct sha1_state *sctx = shash_desc_ctx(desc);
121
122 memcpy(sctx, in, sizeof(*sctx));
123
124 return 0;
125}
126
127static struct shash_alg alg = {
128 .digestsize = SHA1_DIGEST_SIZE,
129 .init = sha1_sparc64_init,
130 .update = sha1_sparc64_update,
131 .final = sha1_sparc64_final,
132 .export = sha1_sparc64_export,
133 .import = sha1_sparc64_import,
134 .descsize = sizeof(struct sha1_state),
135 .statesize = sizeof(struct sha1_state),
136 .base = {
137 .cra_name = "sha1",
138 .cra_driver_name= "sha1-sparc64",
139 .cra_priority = 150,
140 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
141 .cra_blocksize = SHA1_BLOCK_SIZE,
142 .cra_module = THIS_MODULE,
143 }
144};
145
146static bool __init sparc64_has_sha1_opcode(void)
147{
148 unsigned long cfr;
149
150 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
151 return false;
152
153 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
154 if (!(cfr & CFR_SHA1))
155 return false;
156
157 return true;
158}
159
160static int __init sha1_sparc64_mod_init(void)
161{
162 if (sparc64_has_sha1_opcode()) {
163 pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
164 return crypto_register_shash(&alg);
165 }
166 pr_info("sparc64 sha1 opcode not available.\n");
167 return -ENODEV;
168}
169
170static void __exit sha1_sparc64_mod_fini(void)
171{
172 crypto_unregister_shash(&alg);
173}
174
175module_init(sha1_sparc64_mod_init);
176module_exit(sha1_sparc64_mod_fini);
177
178MODULE_LICENSE("GPL");
179MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, sparc64 sha1 opcode accelerated");
180
181MODULE_ALIAS("sha1");
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-28 15:53:49 -0500