1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * CP Assist for Cryptographic Functions (CPACF)
4 *
5 * Copyright IBM Corp. 2003, 2023
6 * Author(s): Thomas Spatzier
7 * Jan Glauber
8 * Harald Freudenberger (freude@de.ibm.com)
9 * Martin Schwidefsky <schwidefsky@de.ibm.com>
10 */
11 #ifndef _ASM_S390_CPACF_H
12 #define _ASM_S390_CPACF_H
13
14 #include <asm/facility.h>
15 #include <linux/kmsan-checks.h>
16
17 /*
18 * Instruction opcodes for the CPACF instructions
19 */
20 #define CPACF_KMAC 0xb91e /* MSA */
21 #define CPACF_KM 0xb92e /* MSA */
22 #define CPACF_KMC 0xb92f /* MSA */
23 #define CPACF_KIMD 0xb93e /* MSA */
24 #define CPACF_KLMD 0xb93f /* MSA */
25 #define CPACF_PCKMO 0xb928 /* MSA3 */
26 #define CPACF_KMF 0xb92a /* MSA4 */
27 #define CPACF_KMO 0xb92b /* MSA4 */
28 #define CPACF_PCC 0xb92c /* MSA4 */
29 #define CPACF_KMCTR 0xb92d /* MSA4 */
30 #define CPACF_PRNO 0xb93c /* MSA5 */
31 #define CPACF_KMA 0xb929 /* MSA8 */
32 #define CPACF_KDSA 0xb93a /* MSA9 */
33
34 /*
35 * En/decryption modifier bits
36 */
37 #define CPACF_ENCRYPT 0x00
38 #define CPACF_DECRYPT 0x80
39
40 /*
41 * Function codes for the KM (CIPHER MESSAGE) instruction
42 */
43 #define CPACF_KM_QUERY 0x00
44 #define CPACF_KM_DEA 0x01
45 #define CPACF_KM_TDEA_128 0x02
46 #define CPACF_KM_TDEA_192 0x03
47 #define CPACF_KM_AES_128 0x12
48 #define CPACF_KM_AES_192 0x13
49 #define CPACF_KM_AES_256 0x14
50 #define CPACF_KM_PAES_128 0x1a
51 #define CPACF_KM_PAES_192 0x1b
52 #define CPACF_KM_PAES_256 0x1c
53 #define CPACF_KM_XTS_128 0x32
54 #define CPACF_KM_XTS_256 0x34
55 #define CPACF_KM_PXTS_128 0x3a
56 #define CPACF_KM_PXTS_256 0x3c
57 #define CPACF_KM_XTS_128_FULL 0x52
58 #define CPACF_KM_XTS_256_FULL 0x54
59 #define CPACF_KM_PXTS_128_FULL 0x5a
60 #define CPACF_KM_PXTS_256_FULL 0x5c
61
62 /*
63 * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
64 * instruction
65 */
66 #define CPACF_KMC_QUERY 0x00
67 #define CPACF_KMC_DEA 0x01
68 #define CPACF_KMC_TDEA_128 0x02
69 #define CPACF_KMC_TDEA_192 0x03
70 #define CPACF_KMC_AES_128 0x12
71 #define CPACF_KMC_AES_192 0x13
72 #define CPACF_KMC_AES_256 0x14
73 #define CPACF_KMC_PAES_128 0x1a
74 #define CPACF_KMC_PAES_192 0x1b
75 #define CPACF_KMC_PAES_256 0x1c
76 #define CPACF_KMC_PRNG 0x43
77
78 /*
79 * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
80 * instruction
81 */
82 #define CPACF_KMCTR_QUERY 0x00
83 #define CPACF_KMCTR_DEA 0x01
84 #define CPACF_KMCTR_TDEA_128 0x02
85 #define CPACF_KMCTR_TDEA_192 0x03
86 #define CPACF_KMCTR_AES_128 0x12
87 #define CPACF_KMCTR_AES_192 0x13
88 #define CPACF_KMCTR_AES_256 0x14
89 #define CPACF_KMCTR_PAES_128 0x1a
90 #define CPACF_KMCTR_PAES_192 0x1b
91 #define CPACF_KMCTR_PAES_256 0x1c
92
93 /*
94 * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
95 * instruction
96 */
97 #define CPACF_KIMD_QUERY 0x00
98 #define CPACF_KIMD_SHA_1 0x01
99 #define CPACF_KIMD_SHA_256 0x02
100 #define CPACF_KIMD_SHA_512 0x03
101 #define CPACF_KIMD_SHA3_224 0x20
102 #define CPACF_KIMD_SHA3_256 0x21
103 #define CPACF_KIMD_SHA3_384 0x22
104 #define CPACF_KIMD_SHA3_512 0x23
105 #define CPACF_KIMD_GHASH 0x41
106
107 /*
108 * Function codes for the KLMD (COMPUTE LAST MESSAGE DIGEST)
109 * instruction
110 */
111 #define CPACF_KLMD_QUERY 0x00
112 #define CPACF_KLMD_SHA_1 0x01
113 #define CPACF_KLMD_SHA_256 0x02
114 #define CPACF_KLMD_SHA_512 0x03
115 #define CPACF_KLMD_SHA3_224 0x20
116 #define CPACF_KLMD_SHA3_256 0x21
117 #define CPACF_KLMD_SHA3_384 0x22
118 #define CPACF_KLMD_SHA3_512 0x23
119
120 /*
121 * function codes for the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
122 * instruction
123 */
124 #define CPACF_KMAC_QUERY 0x00
125 #define CPACF_KMAC_DEA 0x01
126 #define CPACF_KMAC_TDEA_128 0x02
127 #define CPACF_KMAC_TDEA_192 0x03
128 #define CPACF_KMAC_HMAC_SHA_224 0x70
129 #define CPACF_KMAC_HMAC_SHA_256 0x71
130 #define CPACF_KMAC_HMAC_SHA_384 0x72
131 #define CPACF_KMAC_HMAC_SHA_512 0x73
132 #define CPACF_KMAC_PHMAC_SHA_224 0x78
133 #define CPACF_KMAC_PHMAC_SHA_256 0x79
134 #define CPACF_KMAC_PHMAC_SHA_384 0x7a
135 #define CPACF_KMAC_PHMAC_SHA_512 0x7b
136
137 /*
138 * Function codes for the PCKMO (PERFORM CRYPTOGRAPHIC KEY MANAGEMENT)
139 * instruction
140 */
141 #define CPACF_PCKMO_QUERY 0x00
142 #define CPACF_PCKMO_ENC_DES_KEY 0x01
143 #define CPACF_PCKMO_ENC_TDES_128_KEY 0x02
144 #define CPACF_PCKMO_ENC_TDES_192_KEY 0x03
145 #define CPACF_PCKMO_ENC_AES_128_KEY 0x12
146 #define CPACF_PCKMO_ENC_AES_192_KEY 0x13
147 #define CPACF_PCKMO_ENC_AES_256_KEY 0x14
148 #define CPACF_PCKMO_ENC_AES_XTS_128_DOUBLE_KEY 0x15
149 #define CPACF_PCKMO_ENC_AES_XTS_256_DOUBLE_KEY 0x16
150 #define CPACF_PCKMO_ENC_ECC_P256_KEY 0x20
151 #define CPACF_PCKMO_ENC_ECC_P384_KEY 0x21
152 #define CPACF_PCKMO_ENC_ECC_P521_KEY 0x22
153 #define CPACF_PCKMO_ENC_ECC_ED25519_KEY 0x28
154 #define CPACF_PCKMO_ENC_ECC_ED448_KEY 0x29
155 #define CPACF_PCKMO_ENC_HMAC_512_KEY 0x76
156 #define CPACF_PCKMO_ENC_HMAC_1024_KEY 0x7a
157
158 /*
159 * Function codes for the PRNO (PERFORM RANDOM NUMBER OPERATION)
160 * instruction
161 */
162 #define CPACF_PRNO_QUERY 0x00
163 #define CPACF_PRNO_SHA512_DRNG_GEN 0x03
164 #define CPACF_PRNO_SHA512_DRNG_SEED 0x83
165 #define CPACF_PRNO_TRNG_Q_R2C_RATIO 0x70
166 #define CPACF_PRNO_TRNG 0x72
167
168 /*
169 * Function codes for the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
170 * instruction
171 */
172 #define CPACF_KMA_QUERY 0x00
173 #define CPACF_KMA_GCM_AES_128 0x12
174 #define CPACF_KMA_GCM_AES_192 0x13
175 #define CPACF_KMA_GCM_AES_256 0x14
176
177 /*
178 * Flags for the KMA (CIPHER MESSAGE WITH AUTHENTICATION) instruction
179 */
180 #define CPACF_KMA_LPC 0x100 /* Last-Plaintext/Ciphertext */
181 #define CPACF_KMA_LAAD 0x200 /* Last-AAD */
182 #define CPACF_KMA_HS 0x400 /* Hash-subkey Supplied */
183
184 /*
185 * Flags for the KIMD/KLMD (COMPUTE INTERMEDIATE/LAST MESSAGE DIGEST)
186 * instructions
187 */
188 #define CPACF_KIMD_NIP 0x8000
189 #define CPACF_KLMD_DUFOP 0x4000
190 #define CPACF_KLMD_NIP 0x8000
191
192 /*
193 * Function codes for KDSA (COMPUTE DIGITAL SIGNATURE AUTHENTICATION)
194 * instruction
195 */
196 #define CPACF_KDSA_QUERY 0x00
197 #define CPACF_KDSA_ECDSA_VERIFY_P256 0x01
198 #define CPACF_KDSA_ECDSA_VERIFY_P384 0x02
199 #define CPACF_KDSA_ECDSA_VERIFY_P521 0x03
200 #define CPACF_KDSA_ECDSA_SIGN_P256 0x09
201 #define CPACF_KDSA_ECDSA_SIGN_P384 0x0a
202 #define CPACF_KDSA_ECDSA_SIGN_P521 0x0b
203 #define CPACF_KDSA_ENC_ECDSA_SIGN_P256 0x11
204 #define CPACF_KDSA_ENC_ECDSA_SIGN_P384 0x12
205 #define CPACF_KDSA_ENC_ECDSA_SIGN_P521 0x13
206 #define CPACF_KDSA_EDDSA_VERIFY_ED25519 0x20
207 #define CPACF_KDSA_EDDSA_VERIFY_ED448 0x24
208 #define CPACF_KDSA_EDDSA_SIGN_ED25519 0x28
209 #define CPACF_KDSA_EDDSA_SIGN_ED448 0x2c
210 #define CPACF_KDSA_ENC_EDDSA_SIGN_ED25519 0x30
211 #define CPACF_KDSA_ENC_EDDSA_SIGN_ED448 0x34
212
213 #define CPACF_FC_QUERY 0x00
214 #define CPACF_FC_QUERY_AUTH_INFO 0x7F
215
216 typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
217 typedef struct { unsigned char bytes[256]; } cpacf_qai_t;
218
219 /*
220 * Prototype for a not existing function to produce a link
221 * error if __cpacf_query() or __cpacf_check_opcode() is used
222 * with an invalid compile time const opcode.
223 */
224 void __cpacf_bad_opcode(void);
225
__cpacf_query_rre(u32 opc,u8 r1,u8 r2,u8 * pb,u8 fc)226 static __always_inline void __cpacf_query_rre(u32 opc, u8 r1, u8 r2,
227 u8 *pb, u8 fc)
228 {
229 asm volatile(
230 " la %%r1,%[pb]\n"
231 " lghi %%r0,%[fc]\n"
232 " .insn rre,%[opc] << 16,%[r1],%[r2]\n"
233 : [pb] "=R" (*pb)
234 : [opc] "i" (opc), [fc] "i" (fc),
235 [r1] "i" (r1), [r2] "i" (r2)
236 : "cc", "memory", "r0", "r1");
237 }
238
__cpacf_query_rrf(u32 opc,u8 r1,u8 r2,u8 r3,u8 m4,u8 * pb,u8 fc)239 static __always_inline void __cpacf_query_rrf(u32 opc, u8 r1, u8 r2, u8 r3,
240 u8 m4, u8 *pb, u8 fc)
241 {
242 asm volatile(
243 " la %%r1,%[pb]\n"
244 " lghi %%r0,%[fc]\n"
245 " .insn rrf,%[opc] << 16,%[r1],%[r2],%[r3],%[m4]\n"
246 : [pb] "=R" (*pb)
247 : [opc] "i" (opc), [fc] "i" (fc), [r1] "i" (r1),
248 [r2] "i" (r2), [r3] "i" (r3), [m4] "i" (m4)
249 : "cc", "memory", "r0", "r1");
250 }
251
__cpacf_query_insn(unsigned int opcode,void * pb,u8 fc)252 static __always_inline void __cpacf_query_insn(unsigned int opcode, void *pb,
253 u8 fc)
254 {
255 switch (opcode) {
256 case CPACF_KDSA:
257 __cpacf_query_rre(CPACF_KDSA, 0, 2, pb, fc);
258 break;
259 case CPACF_KIMD:
260 __cpacf_query_rre(CPACF_KIMD, 0, 2, pb, fc);
261 break;
262 case CPACF_KLMD:
263 __cpacf_query_rre(CPACF_KLMD, 0, 2, pb, fc);
264 break;
265 case CPACF_KM:
266 __cpacf_query_rre(CPACF_KM, 2, 4, pb, fc);
267 break;
268 case CPACF_KMA:
269 __cpacf_query_rrf(CPACF_KMA, 2, 4, 6, 0, pb, fc);
270 break;
271 case CPACF_KMAC:
272 __cpacf_query_rre(CPACF_KMAC, 0, 2, pb, fc);
273 break;
274 case CPACF_KMC:
275 __cpacf_query_rre(CPACF_KMC, 2, 4, pb, fc);
276 break;
277 case CPACF_KMCTR:
278 __cpacf_query_rrf(CPACF_KMCTR, 2, 4, 6, 0, pb, fc);
279 break;
280 case CPACF_KMF:
281 __cpacf_query_rre(CPACF_KMF, 2, 4, pb, fc);
282 break;
283 case CPACF_KMO:
284 __cpacf_query_rre(CPACF_KMO, 2, 4, pb, fc);
285 break;
286 case CPACF_PCC:
287 __cpacf_query_rre(CPACF_PCC, 0, 0, pb, fc);
288 break;
289 case CPACF_PCKMO:
290 __cpacf_query_rre(CPACF_PCKMO, 0, 0, pb, fc);
291 break;
292 case CPACF_PRNO:
293 __cpacf_query_rre(CPACF_PRNO, 2, 4, pb, fc);
294 break;
295 default:
296 __cpacf_bad_opcode();
297 }
298 }
299
__cpacf_query(unsigned int opcode,cpacf_mask_t * mask)300 static __always_inline void __cpacf_query(unsigned int opcode,
301 cpacf_mask_t *mask)
302 {
303 __cpacf_query_insn(opcode, mask, CPACF_FC_QUERY);
304 }
305
__cpacf_check_opcode(unsigned int opcode)306 static __always_inline int __cpacf_check_opcode(unsigned int opcode)
307 {
308 switch (opcode) {
309 case CPACF_KMAC:
310 case CPACF_KM:
311 case CPACF_KMC:
312 case CPACF_KIMD:
313 case CPACF_KLMD:
314 return test_facility(17); /* check for MSA */
315 case CPACF_PCKMO:
316 return test_facility(76); /* check for MSA3 */
317 case CPACF_KMF:
318 case CPACF_KMO:
319 case CPACF_PCC:
320 case CPACF_KMCTR:
321 return test_facility(77); /* check for MSA4 */
322 case CPACF_PRNO:
323 return test_facility(57); /* check for MSA5 */
324 case CPACF_KMA:
325 return test_facility(146); /* check for MSA8 */
326 case CPACF_KDSA:
327 return test_facility(155); /* check for MSA9 */
328 default:
329 __cpacf_bad_opcode();
330 return 0;
331 }
332 }
333
334 /**
335 * cpacf_query() - Query the function code mask for this CPACF opcode
336 * @opcode: the opcode of the crypto instruction
337 * @mask: ptr to struct cpacf_mask_t
338 *
339 * Executes the query function for the given crypto instruction @opcode
340 * and checks if @func is available
341 *
342 * On success 1 is returned and the mask is filled with the function
343 * code mask for this CPACF opcode, otherwise 0 is returned.
344 */
cpacf_query(unsigned int opcode,cpacf_mask_t * mask)345 static __always_inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
346 {
347 if (__cpacf_check_opcode(opcode)) {
348 __cpacf_query(opcode, mask);
349 return 1;
350 }
351 memset(mask, 0, sizeof(*mask));
352 return 0;
353 }
354
cpacf_test_func(cpacf_mask_t * mask,unsigned int func)355 static inline int cpacf_test_func(cpacf_mask_t *mask, unsigned int func)
356 {
357 return (mask->bytes[func >> 3] & (0x80 >> (func & 7))) != 0;
358 }
359
cpacf_query_func(unsigned int opcode,unsigned int func)360 static __always_inline int cpacf_query_func(unsigned int opcode,
361 unsigned int func)
362 {
363 cpacf_mask_t mask;
364
365 if (cpacf_query(opcode, &mask))
366 return cpacf_test_func(&mask, func);
367 return 0;
368 }
369
__cpacf_qai(unsigned int opcode,cpacf_qai_t * qai)370 static __always_inline void __cpacf_qai(unsigned int opcode, cpacf_qai_t *qai)
371 {
372 __cpacf_query_insn(opcode, qai, CPACF_FC_QUERY_AUTH_INFO);
373 }
374
375 /**
376 * cpacf_qai() - Get the query authentication information for a CPACF opcode
377 * @opcode: the opcode of the crypto instruction
378 * @mask: ptr to struct cpacf_qai_t
379 *
380 * Executes the query authentication information function for the given crypto
381 * instruction @opcode and checks if @func is available
382 *
383 * On success 1 is returned and the mask is filled with the query authentication
384 * information for this CPACF opcode, otherwise 0 is returned.
385 */
cpacf_qai(unsigned int opcode,cpacf_qai_t * qai)386 static __always_inline int cpacf_qai(unsigned int opcode, cpacf_qai_t *qai)
387 {
388 if (cpacf_query_func(opcode, CPACF_FC_QUERY_AUTH_INFO)) {
389 __cpacf_qai(opcode, qai);
390 return 1;
391 }
392 memset(qai, 0, sizeof(*qai));
393 return 0;
394 }
395
396 /**
397 * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
398 * @func: the function code passed to KM; see CPACF_KM_xxx defines
399 * @param: address of parameter block; see POP for details on each func
400 * @dest: address of destination memory area
401 * @src: address of source memory area
402 * @src_len: length of src operand in bytes
403 *
404 * Returns 0 for the query func, number of processed bytes for
405 * encryption/decryption funcs
406 */
cpacf_km(unsigned long func,void * param,u8 * dest,const u8 * src,long src_len)407 static inline int cpacf_km(unsigned long func, void *param,
408 u8 *dest, const u8 *src, long src_len)
409 {
410 union register_pair d, s;
411
412 d.even = (unsigned long)dest;
413 s.even = (unsigned long)src;
414 s.odd = (unsigned long)src_len;
415 asm volatile(
416 " lgr 0,%[fc]\n"
417 " lgr 1,%[pba]\n"
418 "0: .insn rre,%[opc] << 16,%[dst],%[src]\n"
419 " brc 1,0b\n" /* handle partial completion */
420 : [src] "+&d" (s.pair), [dst] "+&d" (d.pair)
421 : [fc] "d" (func), [pba] "d" ((unsigned long)param),
422 [opc] "i" (CPACF_KM)
423 : "cc", "memory", "0", "1");
424
425 return src_len - s.odd;
426 }
427
428 /**
429 * cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
430 * @func: the function code passed to KM; see CPACF_KMC_xxx defines
431 * @param: address of parameter block; see POP for details on each func
432 * @dest: address of destination memory area
433 * @src: address of source memory area
434 * @src_len: length of src operand in bytes
435 *
436 * Returns 0 for the query func, number of processed bytes for
437 * encryption/decryption funcs
438 */
cpacf_kmc(unsigned long func,void * param,u8 * dest,const u8 * src,long src_len)439 static inline int cpacf_kmc(unsigned long func, void *param,
440 u8 *dest, const u8 *src, long src_len)
441 {
442 union register_pair d, s;
443
444 d.even = (unsigned long)dest;
445 s.even = (unsigned long)src;
446 s.odd = (unsigned long)src_len;
447 asm volatile(
448 " lgr 0,%[fc]\n"
449 " lgr 1,%[pba]\n"
450 "0: .insn rre,%[opc] << 16,%[dst],%[src]\n"
451 " brc 1,0b\n" /* handle partial completion */
452 : [src] "+&d" (s.pair), [dst] "+&d" (d.pair)
453 : [fc] "d" (func), [pba] "d" ((unsigned long)param),
454 [opc] "i" (CPACF_KMC)
455 : "cc", "memory", "0", "1");
456
457 return src_len - s.odd;
458 }
459
460 /**
461 * cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
462 * instruction
463 * @func: the function code passed to KM; see CPACF_KIMD_xxx defines
464 * @param: address of parameter block; see POP for details on each func
465 * @src: address of source memory area
466 * @src_len: length of src operand in bytes
467 */
cpacf_kimd(unsigned long func,void * param,const u8 * src,long src_len)468 static inline void cpacf_kimd(unsigned long func, void *param,
469 const u8 *src, long src_len)
470 {
471 union register_pair s;
472
473 s.even = (unsigned long)src;
474 s.odd = (unsigned long)src_len;
475 asm volatile(
476 " lgr 0,%[fc]\n"
477 " lgr 1,%[pba]\n"
478 "0: .insn rrf,%[opc] << 16,0,%[src],8,0\n"
479 " brc 1,0b\n" /* handle partial completion */
480 : [src] "+&d" (s.pair)
481 : [fc] "d" (func), [pba] "d" ((unsigned long)(param)),
482 [opc] "i" (CPACF_KIMD)
483 : "cc", "memory", "0", "1");
484 }
485
486 /**
487 * cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
488 * @func: the function code passed to KM; see CPACF_KLMD_xxx defines
489 * @param: address of parameter block; see POP for details on each func
490 * @src: address of source memory area
491 * @src_len: length of src operand in bytes
492 */
cpacf_klmd(unsigned long func,void * param,const u8 * src,long src_len)493 static inline void cpacf_klmd(unsigned long func, void *param,
494 const u8 *src, long src_len)
495 {
496 union register_pair s;
497
498 s.even = (unsigned long)src;
499 s.odd = (unsigned long)src_len;
500 asm volatile(
501 " lgr 0,%[fc]\n"
502 " lgr 1,%[pba]\n"
503 "0: .insn rrf,%[opc] << 16,0,%[src],8,0\n"
504 " brc 1,0b\n" /* handle partial completion */
505 : [src] "+&d" (s.pair)
506 : [fc] "d" (func), [pba] "d" ((unsigned long)param),
507 [opc] "i" (CPACF_KLMD)
508 : "cc", "memory", "0", "1");
509 }
510
511 /**
512 * _cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
513 * instruction and updates flags in gr0
514 * @gr0: pointer to gr0 (fc and flags) passed to KMAC; see CPACF_KMAC_xxx defines
515 * @param: address of parameter block; see POP for details on each func
516 * @src: address of source memory area
517 * @src_len: length of src operand in bytes
518 *
519 * Returns 0 for the query func, number of processed bytes for digest funcs
520 */
_cpacf_kmac(unsigned long * gr0,void * param,const u8 * src,long src_len)521 static inline int _cpacf_kmac(unsigned long *gr0, void *param,
522 const u8 *src, long src_len)
523 {
524 union register_pair s;
525
526 s.even = (unsigned long)src;
527 s.odd = (unsigned long)src_len;
528 asm volatile(
529 " lgr 0,%[r0]\n"
530 " lgr 1,%[pba]\n"
531 "0: .insn rre,%[opc] << 16,0,%[src]\n"
532 " brc 1,0b\n" /* handle partial completion */
533 " lgr %[r0],0\n"
534 : [r0] "+d" (*gr0), [src] "+&d" (s.pair)
535 : [pba] "d" ((unsigned long)param),
536 [opc] "i" (CPACF_KMAC)
537 : "cc", "memory", "0", "1");
538
539 return src_len - s.odd;
540 }
541
542 /**
543 * cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
544 * instruction
545 * @func: function code passed to KMAC; see CPACF_KMAC_xxx defines
546 * @param: address of parameter block; see POP for details on each func
547 * @src: address of source memory area
548 * @src_len: length of src operand in bytes
549 *
550 * Returns 0 for the query func, number of processed bytes for digest funcs
551 */
cpacf_kmac(unsigned long func,void * param,const u8 * src,long src_len)552 static inline int cpacf_kmac(unsigned long func, void *param,
553 const u8 *src, long src_len)
554 {
555 return _cpacf_kmac(&func, param, src, src_len);
556 }
557
558 /**
559 * cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
560 * @func: the function code passed to KMCTR; see CPACF_KMCTR_xxx defines
561 * @param: address of parameter block; see POP for details on each func
562 * @dest: address of destination memory area
563 * @src: address of source memory area
564 * @src_len: length of src operand in bytes
565 * @counter: address of counter value
566 *
567 * Returns 0 for the query func, number of processed bytes for
568 * encryption/decryption funcs
569 */
cpacf_kmctr(unsigned long func,void * param,u8 * dest,const u8 * src,long src_len,u8 * counter)570 static inline int cpacf_kmctr(unsigned long func, void *param, u8 *dest,
571 const u8 *src, long src_len, u8 *counter)
572 {
573 union register_pair d, s, c;
574
575 d.even = (unsigned long)dest;
576 s.even = (unsigned long)src;
577 s.odd = (unsigned long)src_len;
578 c.even = (unsigned long)counter;
579 asm volatile(
580 " lgr 0,%[fc]\n"
581 " lgr 1,%[pba]\n"
582 "0: .insn rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
583 " brc 1,0b\n" /* handle partial completion */
584 : [src] "+&d" (s.pair), [dst] "+&d" (d.pair),
585 [ctr] "+&d" (c.pair)
586 : [fc] "d" (func), [pba] "d" ((unsigned long)param),
587 [opc] "i" (CPACF_KMCTR)
588 : "cc", "memory", "0", "1");
589
590 return src_len - s.odd;
591 }
592
593 /**
594 * cpacf_prno() - executes the PRNO (PERFORM RANDOM NUMBER OPERATION)
595 * instruction
596 * @func: the function code passed to PRNO; see CPACF_PRNO_xxx defines
597 * @param: address of parameter block; see POP for details on each func
598 * @dest: address of destination memory area
599 * @dest_len: size of destination memory area in bytes
600 * @seed: address of seed data
601 * @seed_len: size of seed data in bytes
602 */
cpacf_prno(unsigned long func,void * param,u8 * dest,unsigned long dest_len,const u8 * seed,unsigned long seed_len)603 static inline void cpacf_prno(unsigned long func, void *param,
604 u8 *dest, unsigned long dest_len,
605 const u8 *seed, unsigned long seed_len)
606 {
607 union register_pair d, s;
608
609 d.even = (unsigned long)dest;
610 d.odd = (unsigned long)dest_len;
611 s.even = (unsigned long)seed;
612 s.odd = (unsigned long)seed_len;
613 asm volatile (
614 " lgr 0,%[fc]\n"
615 " lgr 1,%[pba]\n"
616 "0: .insn rre,%[opc] << 16,%[dst],%[seed]\n"
617 " brc 1,0b\n" /* handle partial completion */
618 : [dst] "+&d" (d.pair)
619 : [fc] "d" (func), [pba] "d" ((unsigned long)param),
620 [seed] "d" (s.pair), [opc] "i" (CPACF_PRNO)
621 : "cc", "memory", "0", "1");
622 }
623
624 /**
625 * cpacf_trng() - executes the TRNG subfunction of the PRNO instruction
626 * @ucbuf: buffer for unconditioned data
627 * @ucbuf_len: amount of unconditioned data to fetch in bytes
628 * @cbuf: buffer for conditioned data
629 * @cbuf_len: amount of conditioned data to fetch in bytes
630 */
cpacf_trng(u8 * ucbuf,unsigned long ucbuf_len,u8 * cbuf,unsigned long cbuf_len)631 static inline void cpacf_trng(u8 *ucbuf, unsigned long ucbuf_len,
632 u8 *cbuf, unsigned long cbuf_len)
633 {
634 union register_pair u, c;
635
636 u.even = (unsigned long)ucbuf;
637 u.odd = (unsigned long)ucbuf_len;
638 c.even = (unsigned long)cbuf;
639 c.odd = (unsigned long)cbuf_len;
640 asm volatile (
641 " lghi 0,%[fc]\n"
642 "0: .insn rre,%[opc] << 16,%[ucbuf],%[cbuf]\n"
643 " brc 1,0b\n" /* handle partial completion */
644 : [ucbuf] "+&d" (u.pair), [cbuf] "+&d" (c.pair)
645 : [fc] "K" (CPACF_PRNO_TRNG), [opc] "i" (CPACF_PRNO)
646 : "cc", "memory", "0");
647 kmsan_unpoison_memory(ucbuf, ucbuf_len);
648 kmsan_unpoison_memory(cbuf, cbuf_len);
649 }
650
651 /**
652 * cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
653 * instruction
654 * @func: the function code passed to PCC; see CPACF_KM_xxx defines
655 * @param: address of parameter block; see POP for details on each func
656 *
657 * Returns the condition code, this is
658 * 0 - cc code 0 (normal completion)
659 * 1 - cc code 1 (protected key wkvp mismatch or src operand out of range)
660 * 2 - cc code 2 (something invalid, scalar multiply infinity, ...)
661 * Condition code 3 (partial completion) is handled within the asm code
662 * and never returned.
663 */
cpacf_pcc(unsigned long func,void * param)664 static inline int cpacf_pcc(unsigned long func, void *param)
665 {
666 int cc;
667
668 asm volatile(
669 " lgr 0,%[fc]\n"
670 " lgr 1,%[pba]\n"
671 "0: .insn rre,%[opc] << 16,0,0\n" /* PCC opcode */
672 " brc 1,0b\n" /* handle partial completion */
673 CC_IPM(cc)
674 : CC_OUT(cc, cc)
675 : [fc] "d" (func), [pba] "d" ((unsigned long)param),
676 [opc] "i" (CPACF_PCC)
677 : CC_CLOBBER_LIST("memory", "0", "1"));
678
679 return CC_TRANSFORM(cc);
680 }
681
682 /**
683 * cpacf_pckmo() - executes the PCKMO (PERFORM CRYPTOGRAPHIC KEY
684 * MANAGEMENT) instruction
685 * @func: the function code passed to PCKMO; see CPACF_PCKMO_xxx defines
686 * @param: address of parameter block; see POP for details on each func
687 *
688 * Returns 0.
689 */
cpacf_pckmo(long func,void * param)690 static inline void cpacf_pckmo(long func, void *param)
691 {
692 asm volatile(
693 " lgr 0,%[fc]\n"
694 " lgr 1,%[pba]\n"
695 " .insn rre,%[opc] << 16,0,0\n" /* PCKMO opcode */
696 :
697 : [fc] "d" (func), [pba] "d" ((unsigned long)param),
698 [opc] "i" (CPACF_PCKMO)
699 : "cc", "memory", "0", "1");
700 }
701
702 /**
703 * cpacf_kma() - executes the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
704 * instruction
705 * @func: the function code passed to KMA; see CPACF_KMA_xxx defines
706 * @param: address of parameter block; see POP for details on each func
707 * @dest: address of destination memory area
708 * @src: address of source memory area
709 * @src_len: length of src operand in bytes
710 * @aad: address of additional authenticated data memory area
711 * @aad_len: length of aad operand in bytes
712 */
cpacf_kma(unsigned long func,void * param,u8 * dest,const u8 * src,unsigned long src_len,const u8 * aad,unsigned long aad_len)713 static inline void cpacf_kma(unsigned long func, void *param, u8 *dest,
714 const u8 *src, unsigned long src_len,
715 const u8 *aad, unsigned long aad_len)
716 {
717 union register_pair d, s, a;
718
719 d.even = (unsigned long)dest;
720 s.even = (unsigned long)src;
721 s.odd = (unsigned long)src_len;
722 a.even = (unsigned long)aad;
723 a.odd = (unsigned long)aad_len;
724 asm volatile(
725 " lgr 0,%[fc]\n"
726 " lgr 1,%[pba]\n"
727 "0: .insn rrf,%[opc] << 16,%[dst],%[src],%[aad],0\n"
728 " brc 1,0b\n" /* handle partial completion */
729 : [dst] "+&d" (d.pair), [src] "+&d" (s.pair),
730 [aad] "+&d" (a.pair)
731 : [fc] "d" (func), [pba] "d" ((unsigned long)param),
732 [opc] "i" (CPACF_KMA)
733 : "cc", "memory", "0", "1");
734 }
735
736 #endif /* _ASM_S390_CPACF_H */
737