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c5aac2df DM |
1 | /* Glue code for DES encryption optimized for sparc64 crypto opcodes. |
2 | * | |
3 | * Copyright (C) 2012 David S. Miller <davem@davemloft.net> | |
4 | */ | |
5 | ||
71741680 DM |
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
7 | ||
c5aac2df DM |
8 | #include <linux/crypto.h> |
9 | #include <linux/init.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/types.h> | |
13 | #include <crypto/algapi.h> | |
14 | #include <crypto/des.h> | |
15 | ||
16 | #include <asm/fpumacro.h> | |
17 | #include <asm/pstate.h> | |
18 | #include <asm/elf.h> | |
19 | ||
10803624 DM |
20 | #include "opcodes.h" |
21 | ||
c5aac2df DM |
22 | struct des_sparc64_ctx { |
23 | u64 encrypt_expkey[DES_EXPKEY_WORDS / 2]; | |
24 | u64 decrypt_expkey[DES_EXPKEY_WORDS / 2]; | |
25 | }; | |
26 | ||
27 | struct des3_ede_sparc64_ctx { | |
28 | u64 encrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2]; | |
29 | u64 decrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2]; | |
30 | }; | |
31 | ||
32 | static void encrypt_to_decrypt(u64 *d, const u64 *e) | |
33 | { | |
34 | const u64 *s = e + (DES_EXPKEY_WORDS / 2) - 1; | |
35 | int i; | |
36 | ||
37 | for (i = 0; i < DES_EXPKEY_WORDS / 2; i++) | |
38 | *d++ = *s--; | |
39 | } | |
40 | ||
41 | extern void des_sparc64_key_expand(const u32 *input_key, u64 *key); | |
42 | ||
43 | static int des_set_key(struct crypto_tfm *tfm, const u8 *key, | |
44 | unsigned int keylen) | |
45 | { | |
46 | struct des_sparc64_ctx *dctx = crypto_tfm_ctx(tfm); | |
47 | u32 *flags = &tfm->crt_flags; | |
48 | u32 tmp[DES_EXPKEY_WORDS]; | |
49 | int ret; | |
50 | ||
51 | /* Even though we have special instructions for key expansion, | |
52 | * we call des_ekey() so that we don't have to write our own | |
53 | * weak key detection code. | |
54 | */ | |
55 | ret = des_ekey(tmp, key); | |
56 | if (unlikely(ret == 0) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) { | |
57 | *flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
58 | return -EINVAL; | |
59 | } | |
60 | ||
61 | des_sparc64_key_expand((const u32 *) key, &dctx->encrypt_expkey[0]); | |
62 | encrypt_to_decrypt(&dctx->decrypt_expkey[0], &dctx->encrypt_expkey[0]); | |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
67 | extern void des_sparc64_crypt(const u64 *key, const u64 *input, | |
68 | u64 *output); | |
69 | ||
70 | static void des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
71 | { | |
72 | struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm); | |
73 | const u64 *K = ctx->encrypt_expkey; | |
74 | ||
75 | des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst); | |
76 | } | |
77 | ||
78 | static void des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
79 | { | |
80 | struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm); | |
81 | const u64 *K = ctx->decrypt_expkey; | |
82 | ||
83 | des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst); | |
84 | } | |
85 | ||
86 | extern void des_sparc64_load_keys(const u64 *key); | |
87 | ||
88 | extern void des_sparc64_ecb_crypt(const u64 *input, u64 *output, | |
89 | unsigned int len); | |
90 | ||
91 | #define DES_BLOCK_MASK (~(DES_BLOCK_SIZE - 1)) | |
92 | ||
93 | static int __ecb_crypt(struct blkcipher_desc *desc, | |
94 | struct scatterlist *dst, struct scatterlist *src, | |
95 | unsigned int nbytes, bool encrypt) | |
96 | { | |
97 | struct des_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
98 | struct blkcipher_walk walk; | |
99 | int err; | |
100 | ||
101 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
102 | err = blkcipher_walk_virt(desc, &walk); | |
103 | ||
104 | if (encrypt) | |
105 | des_sparc64_load_keys(&ctx->encrypt_expkey[0]); | |
106 | else | |
107 | des_sparc64_load_keys(&ctx->decrypt_expkey[0]); | |
108 | while ((nbytes = walk.nbytes)) { | |
109 | unsigned int block_len = nbytes & DES_BLOCK_MASK; | |
110 | ||
111 | if (likely(block_len)) { | |
112 | des_sparc64_ecb_crypt((const u64 *)walk.src.virt.addr, | |
113 | (u64 *) walk.dst.virt.addr, | |
114 | block_len); | |
115 | } | |
116 | nbytes &= DES_BLOCK_SIZE - 1; | |
117 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
118 | } | |
119 | fprs_write(0); | |
120 | return err; | |
121 | } | |
122 | ||
123 | static int ecb_encrypt(struct blkcipher_desc *desc, | |
124 | struct scatterlist *dst, struct scatterlist *src, | |
125 | unsigned int nbytes) | |
126 | { | |
127 | return __ecb_crypt(desc, dst, src, nbytes, true); | |
128 | } | |
129 | ||
130 | static int ecb_decrypt(struct blkcipher_desc *desc, | |
131 | struct scatterlist *dst, struct scatterlist *src, | |
132 | unsigned int nbytes) | |
133 | { | |
134 | return __ecb_crypt(desc, dst, src, nbytes, false); | |
135 | } | |
136 | ||
137 | extern void des_sparc64_cbc_encrypt(const u64 *input, u64 *output, | |
138 | unsigned int len, u64 *iv); | |
139 | ||
140 | static int cbc_encrypt(struct blkcipher_desc *desc, | |
141 | struct scatterlist *dst, struct scatterlist *src, | |
142 | unsigned int nbytes) | |
143 | { | |
144 | struct des_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
145 | struct blkcipher_walk walk; | |
146 | int err; | |
147 | ||
148 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
149 | err = blkcipher_walk_virt(desc, &walk); | |
150 | ||
151 | des_sparc64_load_keys(&ctx->encrypt_expkey[0]); | |
152 | while ((nbytes = walk.nbytes)) { | |
153 | unsigned int block_len = nbytes & DES_BLOCK_MASK; | |
154 | ||
155 | if (likely(block_len)) { | |
156 | des_sparc64_cbc_encrypt((const u64 *)walk.src.virt.addr, | |
157 | (u64 *) walk.dst.virt.addr, | |
158 | block_len, (u64 *) walk.iv); | |
159 | } | |
160 | nbytes &= DES_BLOCK_SIZE - 1; | |
161 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
162 | } | |
163 | fprs_write(0); | |
164 | return err; | |
165 | } | |
166 | ||
167 | extern void des_sparc64_cbc_decrypt(const u64 *input, u64 *output, | |
168 | unsigned int len, u64 *iv); | |
169 | ||
170 | static int cbc_decrypt(struct blkcipher_desc *desc, | |
171 | struct scatterlist *dst, struct scatterlist *src, | |
172 | unsigned int nbytes) | |
173 | { | |
174 | struct des_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
175 | struct blkcipher_walk walk; | |
176 | int err; | |
177 | ||
178 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
179 | err = blkcipher_walk_virt(desc, &walk); | |
180 | ||
181 | des_sparc64_load_keys(&ctx->decrypt_expkey[0]); | |
182 | while ((nbytes = walk.nbytes)) { | |
183 | unsigned int block_len = nbytes & DES_BLOCK_MASK; | |
184 | ||
185 | if (likely(block_len)) { | |
186 | des_sparc64_cbc_decrypt((const u64 *)walk.src.virt.addr, | |
187 | (u64 *) walk.dst.virt.addr, | |
188 | block_len, (u64 *) walk.iv); | |
189 | } | |
190 | nbytes &= DES_BLOCK_SIZE - 1; | |
191 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
192 | } | |
193 | fprs_write(0); | |
194 | return err; | |
195 | } | |
196 | ||
197 | static int des3_ede_set_key(struct crypto_tfm *tfm, const u8 *key, | |
198 | unsigned int keylen) | |
199 | { | |
200 | struct des3_ede_sparc64_ctx *dctx = crypto_tfm_ctx(tfm); | |
201 | const u32 *K = (const u32 *)key; | |
202 | u32 *flags = &tfm->crt_flags; | |
203 | u64 k1[DES_EXPKEY_WORDS / 2]; | |
204 | u64 k2[DES_EXPKEY_WORDS / 2]; | |
205 | u64 k3[DES_EXPKEY_WORDS / 2]; | |
206 | ||
207 | if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) || | |
208 | !((K[2] ^ K[4]) | (K[3] ^ K[5]))) && | |
209 | (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) { | |
210 | *flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
211 | return -EINVAL; | |
212 | } | |
213 | ||
214 | des_sparc64_key_expand((const u32 *)key, k1); | |
215 | key += DES_KEY_SIZE; | |
216 | des_sparc64_key_expand((const u32 *)key, k2); | |
217 | key += DES_KEY_SIZE; | |
218 | des_sparc64_key_expand((const u32 *)key, k3); | |
219 | ||
220 | memcpy(&dctx->encrypt_expkey[0], &k1[0], sizeof(k1)); | |
221 | encrypt_to_decrypt(&dctx->encrypt_expkey[DES_EXPKEY_WORDS / 2], &k2[0]); | |
222 | memcpy(&dctx->encrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2], | |
223 | &k3[0], sizeof(k3)); | |
224 | ||
225 | encrypt_to_decrypt(&dctx->decrypt_expkey[0], &k3[0]); | |
226 | memcpy(&dctx->decrypt_expkey[DES_EXPKEY_WORDS / 2], | |
227 | &k2[0], sizeof(k2)); | |
228 | encrypt_to_decrypt(&dctx->decrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2], | |
229 | &k1[0]); | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | extern void des3_ede_sparc64_crypt(const u64 *key, const u64 *input, | |
235 | u64 *output); | |
236 | ||
237 | static void des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
238 | { | |
239 | struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm); | |
240 | const u64 *K = ctx->encrypt_expkey; | |
241 | ||
242 | des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst); | |
243 | } | |
244 | ||
245 | static void des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
246 | { | |
247 | struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm); | |
248 | const u64 *K = ctx->decrypt_expkey; | |
249 | ||
250 | des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst); | |
251 | } | |
252 | ||
253 | extern void des3_ede_sparc64_load_keys(const u64 *key); | |
254 | ||
255 | extern void des3_ede_sparc64_ecb_crypt(const u64 *expkey, const u64 *input, | |
256 | u64 *output, unsigned int len); | |
257 | ||
258 | static int __ecb3_crypt(struct blkcipher_desc *desc, | |
259 | struct scatterlist *dst, struct scatterlist *src, | |
260 | unsigned int nbytes, bool encrypt) | |
261 | { | |
262 | struct des3_ede_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
263 | struct blkcipher_walk walk; | |
264 | const u64 *K; | |
265 | int err; | |
266 | ||
267 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
268 | err = blkcipher_walk_virt(desc, &walk); | |
269 | ||
270 | if (encrypt) | |
271 | K = &ctx->encrypt_expkey[0]; | |
272 | else | |
273 | K = &ctx->decrypt_expkey[0]; | |
274 | des3_ede_sparc64_load_keys(K); | |
275 | while ((nbytes = walk.nbytes)) { | |
276 | unsigned int block_len = nbytes & DES_BLOCK_MASK; | |
277 | ||
278 | if (likely(block_len)) { | |
279 | const u64 *src64 = (const u64 *)walk.src.virt.addr; | |
280 | des3_ede_sparc64_ecb_crypt(K, src64, | |
281 | (u64 *) walk.dst.virt.addr, | |
282 | block_len); | |
283 | } | |
284 | nbytes &= DES_BLOCK_SIZE - 1; | |
285 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
286 | } | |
287 | fprs_write(0); | |
288 | return err; | |
289 | } | |
290 | ||
291 | static int ecb3_encrypt(struct blkcipher_desc *desc, | |
292 | struct scatterlist *dst, struct scatterlist *src, | |
293 | unsigned int nbytes) | |
294 | { | |
295 | return __ecb3_crypt(desc, dst, src, nbytes, true); | |
296 | } | |
297 | ||
298 | static int ecb3_decrypt(struct blkcipher_desc *desc, | |
299 | struct scatterlist *dst, struct scatterlist *src, | |
300 | unsigned int nbytes) | |
301 | { | |
302 | return __ecb3_crypt(desc, dst, src, nbytes, false); | |
303 | } | |
304 | ||
305 | extern void des3_ede_sparc64_cbc_encrypt(const u64 *expkey, const u64 *input, | |
306 | u64 *output, unsigned int len, | |
307 | u64 *iv); | |
308 | ||
309 | static int cbc3_encrypt(struct blkcipher_desc *desc, | |
310 | struct scatterlist *dst, struct scatterlist *src, | |
311 | unsigned int nbytes) | |
312 | { | |
313 | struct des3_ede_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
314 | struct blkcipher_walk walk; | |
315 | const u64 *K; | |
316 | int err; | |
317 | ||
318 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
319 | err = blkcipher_walk_virt(desc, &walk); | |
320 | ||
321 | K = &ctx->encrypt_expkey[0]; | |
322 | des3_ede_sparc64_load_keys(K); | |
323 | while ((nbytes = walk.nbytes)) { | |
324 | unsigned int block_len = nbytes & DES_BLOCK_MASK; | |
325 | ||
326 | if (likely(block_len)) { | |
327 | const u64 *src64 = (const u64 *)walk.src.virt.addr; | |
328 | des3_ede_sparc64_cbc_encrypt(K, src64, | |
329 | (u64 *) walk.dst.virt.addr, | |
330 | block_len, | |
331 | (u64 *) walk.iv); | |
332 | } | |
333 | nbytes &= DES_BLOCK_SIZE - 1; | |
334 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
335 | } | |
336 | fprs_write(0); | |
337 | return err; | |
338 | } | |
339 | ||
340 | extern void des3_ede_sparc64_cbc_decrypt(const u64 *expkey, const u64 *input, | |
341 | u64 *output, unsigned int len, | |
342 | u64 *iv); | |
343 | ||
344 | static int cbc3_decrypt(struct blkcipher_desc *desc, | |
345 | struct scatterlist *dst, struct scatterlist *src, | |
346 | unsigned int nbytes) | |
347 | { | |
348 | struct des3_ede_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
349 | struct blkcipher_walk walk; | |
350 | const u64 *K; | |
351 | int err; | |
352 | ||
353 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
354 | err = blkcipher_walk_virt(desc, &walk); | |
355 | ||
356 | K = &ctx->decrypt_expkey[0]; | |
357 | des3_ede_sparc64_load_keys(K); | |
358 | while ((nbytes = walk.nbytes)) { | |
359 | unsigned int block_len = nbytes & DES_BLOCK_MASK; | |
360 | ||
361 | if (likely(block_len)) { | |
362 | const u64 *src64 = (const u64 *)walk.src.virt.addr; | |
363 | des3_ede_sparc64_cbc_decrypt(K, src64, | |
364 | (u64 *) walk.dst.virt.addr, | |
365 | block_len, | |
366 | (u64 *) walk.iv); | |
367 | } | |
368 | nbytes &= DES_BLOCK_SIZE - 1; | |
369 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
370 | } | |
371 | fprs_write(0); | |
372 | return err; | |
373 | } | |
374 | ||
375 | static struct crypto_alg algs[] = { { | |
376 | .cra_name = "des", | |
377 | .cra_driver_name = "des-sparc64", | |
10803624 | 378 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
c5aac2df DM |
379 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
380 | .cra_blocksize = DES_BLOCK_SIZE, | |
381 | .cra_ctxsize = sizeof(struct des_sparc64_ctx), | |
382 | .cra_alignmask = 7, | |
383 | .cra_module = THIS_MODULE, | |
384 | .cra_u = { | |
385 | .cipher = { | |
386 | .cia_min_keysize = DES_KEY_SIZE, | |
387 | .cia_max_keysize = DES_KEY_SIZE, | |
388 | .cia_setkey = des_set_key, | |
389 | .cia_encrypt = des_encrypt, | |
390 | .cia_decrypt = des_decrypt | |
391 | } | |
392 | } | |
393 | }, { | |
394 | .cra_name = "ecb(des)", | |
395 | .cra_driver_name = "ecb-des-sparc64", | |
10803624 | 396 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
c5aac2df DM |
397 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
398 | .cra_blocksize = DES_BLOCK_SIZE, | |
399 | .cra_ctxsize = sizeof(struct des_sparc64_ctx), | |
400 | .cra_alignmask = 7, | |
401 | .cra_type = &crypto_blkcipher_type, | |
402 | .cra_module = THIS_MODULE, | |
403 | .cra_u = { | |
404 | .blkcipher = { | |
405 | .min_keysize = DES_KEY_SIZE, | |
406 | .max_keysize = DES_KEY_SIZE, | |
407 | .setkey = des_set_key, | |
408 | .encrypt = ecb_encrypt, | |
409 | .decrypt = ecb_decrypt, | |
410 | }, | |
411 | }, | |
412 | }, { | |
413 | .cra_name = "cbc(des)", | |
414 | .cra_driver_name = "cbc-des-sparc64", | |
10803624 | 415 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
c5aac2df DM |
416 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
417 | .cra_blocksize = DES_BLOCK_SIZE, | |
418 | .cra_ctxsize = sizeof(struct des_sparc64_ctx), | |
419 | .cra_alignmask = 7, | |
420 | .cra_type = &crypto_blkcipher_type, | |
421 | .cra_module = THIS_MODULE, | |
422 | .cra_u = { | |
423 | .blkcipher = { | |
424 | .min_keysize = DES_KEY_SIZE, | |
425 | .max_keysize = DES_KEY_SIZE, | |
426 | .setkey = des_set_key, | |
427 | .encrypt = cbc_encrypt, | |
428 | .decrypt = cbc_decrypt, | |
429 | }, | |
430 | }, | |
431 | }, { | |
432 | .cra_name = "des3_ede", | |
433 | .cra_driver_name = "des3_ede-sparc64", | |
10803624 | 434 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
c5aac2df DM |
435 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
436 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
437 | .cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx), | |
438 | .cra_alignmask = 7, | |
439 | .cra_module = THIS_MODULE, | |
440 | .cra_u = { | |
441 | .cipher = { | |
442 | .cia_min_keysize = DES3_EDE_KEY_SIZE, | |
443 | .cia_max_keysize = DES3_EDE_KEY_SIZE, | |
444 | .cia_setkey = des3_ede_set_key, | |
445 | .cia_encrypt = des3_ede_encrypt, | |
446 | .cia_decrypt = des3_ede_decrypt | |
447 | } | |
448 | } | |
449 | }, { | |
450 | .cra_name = "ecb(des3_ede)", | |
451 | .cra_driver_name = "ecb-des3_ede-sparc64", | |
10803624 | 452 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
c5aac2df DM |
453 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
454 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
455 | .cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx), | |
456 | .cra_alignmask = 7, | |
457 | .cra_type = &crypto_blkcipher_type, | |
458 | .cra_module = THIS_MODULE, | |
459 | .cra_u = { | |
460 | .blkcipher = { | |
461 | .min_keysize = DES3_EDE_KEY_SIZE, | |
462 | .max_keysize = DES3_EDE_KEY_SIZE, | |
463 | .setkey = des3_ede_set_key, | |
464 | .encrypt = ecb3_encrypt, | |
465 | .decrypt = ecb3_decrypt, | |
466 | }, | |
467 | }, | |
468 | }, { | |
469 | .cra_name = "cbc(des3_ede)", | |
470 | .cra_driver_name = "cbc-des3_ede-sparc64", | |
10803624 | 471 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
c5aac2df DM |
472 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
473 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
474 | .cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx), | |
475 | .cra_alignmask = 7, | |
476 | .cra_type = &crypto_blkcipher_type, | |
477 | .cra_module = THIS_MODULE, | |
478 | .cra_u = { | |
479 | .blkcipher = { | |
480 | .min_keysize = DES3_EDE_KEY_SIZE, | |
481 | .max_keysize = DES3_EDE_KEY_SIZE, | |
482 | .setkey = des3_ede_set_key, | |
483 | .encrypt = cbc3_encrypt, | |
484 | .decrypt = cbc3_decrypt, | |
485 | }, | |
486 | }, | |
487 | } }; | |
488 | ||
489 | static bool __init sparc64_has_des_opcode(void) | |
490 | { | |
491 | unsigned long cfr; | |
492 | ||
493 | if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO)) | |
494 | return false; | |
495 | ||
496 | __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); | |
497 | if (!(cfr & CFR_DES)) | |
498 | return false; | |
499 | ||
500 | return true; | |
501 | } | |
502 | ||
503 | static int __init des_sparc64_mod_init(void) | |
504 | { | |
505 | int i; | |
506 | ||
507 | for (i = 0; i < ARRAY_SIZE(algs); i++) | |
508 | INIT_LIST_HEAD(&algs[i].cra_list); | |
509 | ||
510 | if (sparc64_has_des_opcode()) { | |
511 | pr_info("Using sparc64 des opcodes optimized DES implementation\n"); | |
512 | return crypto_register_algs(algs, ARRAY_SIZE(algs)); | |
513 | } | |
514 | pr_info("sparc64 des opcodes not available.\n"); | |
515 | return -ENODEV; | |
516 | } | |
517 | ||
518 | static void __exit des_sparc64_mod_fini(void) | |
519 | { | |
520 | crypto_unregister_algs(algs, ARRAY_SIZE(algs)); | |
521 | } | |
522 | ||
523 | module_init(des_sparc64_mod_init); | |
524 | module_exit(des_sparc64_mod_fini); | |
525 | ||
526 | MODULE_LICENSE("GPL"); | |
527 | MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms, sparc64 des opcode accelerated"); | |
528 | ||
529 | MODULE_ALIAS("des"); |