arch/s390/include/asm/cpacf.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * CP Assist for Cryptographic Functions (CPACF)
   4  *
   5  * Copyright IBM Corp. 2003, 2017
   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
  16 /*
  17  * Instruction opcodes for the CPACF instructions
  18  */
  19 #define CPACF_KMAC              0xb91e          /* MSA  */
  20 #define CPACF_KM                0xb92e          /* MSA  */
  21 #define CPACF_KMC               0xb92f          /* MSA  */
  22 #define CPACF_KIMD              0xb93e          /* MSA  */
  23 #define CPACF_KLMD              0xb93f          /* MSA  */
  24 #define CPACF_PCKMO             0xb928          /* MSA3 */
  25 #define CPACF_KMF               0xb92a          /* MSA4 */
  26 #define CPACF_KMO               0xb92b          /* MSA4 */
  27 #define CPACF_PCC               0xb92c          /* MSA4 */
  28 #define CPACF_KMCTR             0xb92d          /* MSA4 */
  29 #define CPACF_PRNO              0xb93c          /* MSA5 */
  30 #define CPACF_KMA               0xb929          /* MSA8 */
  31 #define CPACF_KDSA              0xb93a          /* MSA9 */
  32
  33 /*
  34  * En/decryption modifier bits
  35  */
  36 #define CPACF_ENCRYPT           0x00
  37 #define CPACF_DECRYPT           0x80
  38
  39 /*
  40  * Function codes for the KM (CIPHER MESSAGE) instruction
  41  */
  42 #define CPACF_KM_QUERY          0x00
  43 #define CPACF_KM_DEA            0x01
  44 #define CPACF_KM_TDEA_128       0x02
  45 #define CPACF_KM_TDEA_192       0x03
  46 #define CPACF_KM_AES_128        0x12
  47 #define CPACF_KM_AES_192        0x13
  48 #define CPACF_KM_AES_256        0x14
  49 #define CPACF_KM_PAES_128       0x1a
  50 #define CPACF_KM_PAES_192       0x1b
  51 #define CPACF_KM_PAES_256       0x1c
  52 #define CPACF_KM_XTS_128        0x32
  53 #define CPACF_KM_XTS_256        0x34
  54 #define CPACF_KM_PXTS_128       0x3a
  55 #define CPACF_KM_PXTS_256       0x3c
  56
  57 /*
  58  * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
  59  * instruction
  60  */
  61 #define CPACF_KMC_QUERY         0x00
  62 #define CPACF_KMC_DEA           0x01
  63 #define CPACF_KMC_TDEA_128      0x02
  64 #define CPACF_KMC_TDEA_192      0x03
  65 #define CPACF_KMC_AES_128       0x12
  66 #define CPACF_KMC_AES_192       0x13
  67 #define CPACF_KMC_AES_256       0x14
  68 #define CPACF_KMC_PAES_128      0x1a
  69 #define CPACF_KMC_PAES_192      0x1b
  70 #define CPACF_KMC_PAES_256      0x1c
  71 #define CPACF_KMC_PRNG          0x43
  72
  73 /*
  74  * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
  75  * instruction
  76  */
  77 #define CPACF_KMCTR_QUERY       0x00
  78 #define CPACF_KMCTR_DEA         0x01
  79 #define CPACF_KMCTR_TDEA_128    0x02
  80 #define CPACF_KMCTR_TDEA_192    0x03
  81 #define CPACF_KMCTR_AES_128     0x12
  82 #define CPACF_KMCTR_AES_192     0x13
  83 #define CPACF_KMCTR_AES_256     0x14
  84 #define CPACF_KMCTR_PAES_128    0x1a
  85 #define CPACF_KMCTR_PAES_192    0x1b
  86 #define CPACF_KMCTR_PAES_256    0x1c
  87
  88 /*
  89  * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
  90  * instruction
  91  */
  92 #define CPACF_KIMD_QUERY        0x00
  93 #define CPACF_KIMD_SHA_1        0x01
  94 #define CPACF_KIMD_SHA_256      0x02
  95 #define CPACF_KIMD_SHA_512      0x03
  96 #define CPACF_KIMD_SHA3_224     0x20
  97 #define CPACF_KIMD_SHA3_256     0x21
  98 #define CPACF_KIMD_SHA3_384     0x22
  99 #define CPACF_KIMD_SHA3_512     0x23
 100 #define CPACF_KIMD_GHASH        0x41
 101
 102 /*
 103  * Function codes for the KLMD (COMPUTE LAST MESSAGE DIGEST)
 104  * instruction
 105  */
 106 #define CPACF_KLMD_QUERY        0x00
 107 #define CPACF_KLMD_SHA_1        0x01
 108 #define CPACF_KLMD_SHA_256      0x02
 109 #define CPACF_KLMD_SHA_512      0x03
 110 #define CPACF_KLMD_SHA3_224     0x20
 111 #define CPACF_KLMD_SHA3_256     0x21
 112 #define CPACF_KLMD_SHA3_384     0x22
 113 #define CPACF_KLMD_SHA3_512     0x23
 114
 115 /*
 116  * function codes for the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 117  * instruction
 118  */
 119 #define CPACF_KMAC_QUERY        0x00
 120 #define CPACF_KMAC_DEA          0x01
 121 #define CPACF_KMAC_TDEA_128     0x02
 122 #define CPACF_KMAC_TDEA_192     0x03
 123
 124 /*
 125  * Function codes for the PCKMO (PERFORM CRYPTOGRAPHIC KEY MANAGEMENT)
 126  * instruction
 127  */
 128 #define CPACF_PCKMO_QUERY               0x00
 129 #define CPACF_PCKMO_ENC_DES_KEY         0x01
 130 #define CPACF_PCKMO_ENC_TDES_128_KEY    0x02
 131 #define CPACF_PCKMO_ENC_TDES_192_KEY    0x03
 132 #define CPACF_PCKMO_ENC_AES_128_KEY     0x12
 133 #define CPACF_PCKMO_ENC_AES_192_KEY     0x13
 134 #define CPACF_PCKMO_ENC_AES_256_KEY     0x14
 135
 136 /*
 137  * Function codes for the PRNO (PERFORM RANDOM NUMBER OPERATION)
 138  * instruction
 139  */
 140 #define CPACF_PRNO_QUERY                0x00
 141 #define CPACF_PRNO_SHA512_DRNG_GEN      0x03
 142 #define CPACF_PRNO_SHA512_DRNG_SEED     0x83
 143 #define CPACF_PRNO_TRNG_Q_R2C_RATIO     0x70
 144 #define CPACF_PRNO_TRNG                 0x72
 145
 146 /*
 147  * Function codes for the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
 148  * instruction
 149  */
 150 #define CPACF_KMA_QUERY         0x00
 151 #define CPACF_KMA_GCM_AES_128   0x12
 152 #define CPACF_KMA_GCM_AES_192   0x13
 153 #define CPACF_KMA_GCM_AES_256   0x14
 154
 155 /*
 156  * Flags for the KMA (CIPHER MESSAGE WITH AUTHENTICATION) instruction
 157  */
 158 #define CPACF_KMA_LPC   0x100   /* Last-Plaintext/Ciphertext */
 159 #define CPACF_KMA_LAAD  0x200   /* Last-AAD */
 160 #define CPACF_KMA_HS    0x400   /* Hash-subkey Supplied */
 161
 162 typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
 163
 164 /**
 165  * cpacf_query() - check if a specific CPACF function is available
 166  * @opcode: the opcode of the crypto instruction
 167  * @func: the function code to test for
 168  *
 169  * Executes the query function for the given crypto instruction @opcode
 170  * and checks if @func is available
 171  *
 172  * Returns 1 if @func is available for @opcode, 0 otherwise
 173  */
 174 static __always_inline void __cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 175 {
 176         register unsigned long r0 asm("0") = 0; /* query function */
 177         register unsigned long r1 asm("1") = (unsigned long) mask;
 178
 179         asm volatile(
 180                 "       spm 0\n" /* pckmo doesn't change the cc */
 181                 /* Parameter regs are ignored, but must be nonzero and unique */
 182                 "0:     .insn   rrf,%[opc] << 16,2,4,6,0\n"
 183                 "       brc     1,0b\n" /* handle partial completion */
 184                 : "=m" (*mask)
 185                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
 186                 : "cc");
 187 }
 188
 189 static __always_inline int __cpacf_check_opcode(unsigned int opcode)
 190 {
 191         switch (opcode) {
 192         case CPACF_KMAC:
 193         case CPACF_KM:
 194         case CPACF_KMC:
 195         case CPACF_KIMD:
 196         case CPACF_KLMD:
 197                 return test_facility(17);       /* check for MSA */
 198         case CPACF_PCKMO:
 199                 return test_facility(76);       /* check for MSA3 */
 200         case CPACF_KMF:
 201         case CPACF_KMO:
 202         case CPACF_PCC:
 203         case CPACF_KMCTR:
 204                 return test_facility(77);       /* check for MSA4 */
 205         case CPACF_PRNO:
 206                 return test_facility(57);       /* check for MSA5 */
 207         case CPACF_KMA:
 208                 return test_facility(146);      /* check for MSA8 */
 209         default:
 210                 BUG();
 211         }
 212 }
 213
 214 static __always_inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 215 {
 216         if (__cpacf_check_opcode(opcode)) {
 217                 __cpacf_query(opcode, mask);
 218                 return 1;
 219         }
 220         memset(mask, 0, sizeof(*mask));
 221         return 0;
 222 }
 223
 224 static inline int cpacf_test_func(cpacf_mask_t *mask, unsigned int func)
 225 {
 226         return (mask->bytes[func >> 3] & (0x80 >> (func & 7))) != 0;
 227 }
 228
 229 static __always_inline int cpacf_query_func(unsigned int opcode, unsigned int func)
 230 {
 231         cpacf_mask_t mask;
 232
 233         if (cpacf_query(opcode, &mask))
 234                 return cpacf_test_func(&mask, func);
 235         return 0;
 236 }
 237
 238 /**
 239  * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
 240  * @func: the function code passed to KM; see CPACF_KM_xxx defines
 241  * @param: address of parameter block; see POP for details on each func
 242  * @dest: address of destination memory area
 243  * @src: address of source memory area
 244  * @src_len: length of src operand in bytes
 245  *
 246  * Returns 0 for the query func, number of processed bytes for
 247  * encryption/decryption funcs
 248  */
 249 static inline int cpacf_km(unsigned long func, void *param,
 250                            u8 *dest, const u8 *src, long src_len)
 251 {
 252         register unsigned long r0 asm("0") = (unsigned long) func;
 253         register unsigned long r1 asm("1") = (unsigned long) param;
 254         register unsigned long r2 asm("2") = (unsigned long) src;
 255         register unsigned long r3 asm("3") = (unsigned long) src_len;
 256         register unsigned long r4 asm("4") = (unsigned long) dest;
 257
 258         asm volatile(
 259                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 260                 "       brc     1,0b\n" /* handle partial completion */
 261                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 262                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KM)
 263                 : "cc", "memory");
 264
 265         return src_len - r3;
 266 }
 267
 268 /**
 269  * cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
 270  * @func: the function code passed to KM; see CPACF_KMC_xxx defines
 271  * @param: address of parameter block; see POP for details on each func
 272  * @dest: address of destination memory area
 273  * @src: address of source memory area
 274  * @src_len: length of src operand in bytes
 275  *
 276  * Returns 0 for the query func, number of processed bytes for
 277  * encryption/decryption funcs
 278  */
 279 static inline int cpacf_kmc(unsigned long func, void *param,
 280                             u8 *dest, const u8 *src, long src_len)
 281 {
 282         register unsigned long r0 asm("0") = (unsigned long) func;
 283         register unsigned long r1 asm("1") = (unsigned long) param;
 284         register unsigned long r2 asm("2") = (unsigned long) src;
 285         register unsigned long r3 asm("3") = (unsigned long) src_len;
 286         register unsigned long r4 asm("4") = (unsigned long) dest;
 287
 288         asm volatile(
 289                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 290                 "       brc     1,0b\n" /* handle partial completion */
 291                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 292                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMC)
 293                 : "cc", "memory");
 294
 295         return src_len - r3;
 296 }
 297
 298 /**
 299  * cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
 300  *                instruction
 301  * @func: the function code passed to KM; see CPACF_KIMD_xxx defines
 302  * @param: address of parameter block; see POP for details on each func
 303  * @src: address of source memory area
 304  * @src_len: length of src operand in bytes
 305  */
 306 static inline void cpacf_kimd(unsigned long func, void *param,
 307                               const u8 *src, long src_len)
 308 {
 309         register unsigned long r0 asm("0") = (unsigned long) func;
 310         register unsigned long r1 asm("1") = (unsigned long) param;
 311         register unsigned long r2 asm("2") = (unsigned long) src;
 312         register unsigned long r3 asm("3") = (unsigned long) src_len;
 313
 314         asm volatile(
 315                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 316                 "       brc     1,0b\n" /* handle partial completion */
 317                 : [src] "+a" (r2), [len] "+d" (r3)
 318                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KIMD)
 319                 : "cc", "memory");
 320 }
 321
 322 /**
 323  * cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
 324  * @func: the function code passed to KM; see CPACF_KLMD_xxx defines
 325  * @param: address of parameter block; see POP for details on each func
 326  * @src: address of source memory area
 327  * @src_len: length of src operand in bytes
 328  */
 329 static inline void cpacf_klmd(unsigned long func, void *param,
 330                               const u8 *src, long src_len)
 331 {
 332         register unsigned long r0 asm("0") = (unsigned long) func;
 333         register unsigned long r1 asm("1") = (unsigned long) param;
 334         register unsigned long r2 asm("2") = (unsigned long) src;
 335         register unsigned long r3 asm("3") = (unsigned long) src_len;
 336
 337         asm volatile(
 338                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 339                 "       brc     1,0b\n" /* handle partial completion */
 340                 : [src] "+a" (r2), [len] "+d" (r3)
 341                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KLMD)
 342                 : "cc", "memory");
 343 }
 344
 345 /**
 346  * cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 347  *                instruction
 348  * @func: the function code passed to KM; see CPACF_KMAC_xxx defines
 349  * @param: address of parameter block; see POP for details on each func
 350  * @src: address of source memory area
 351  * @src_len: length of src operand in bytes
 352  *
 353  * Returns 0 for the query func, number of processed bytes for digest funcs
 354  */
 355 static inline int cpacf_kmac(unsigned long func, void *param,
 356                              const u8 *src, long src_len)
 357 {
 358         register unsigned long r0 asm("0") = (unsigned long) func;
 359         register unsigned long r1 asm("1") = (unsigned long) param;
 360         register unsigned long r2 asm("2") = (unsigned long) src;
 361         register unsigned long r3 asm("3") = (unsigned long) src_len;
 362
 363         asm volatile(
 364                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 365                 "       brc     1,0b\n" /* handle partial completion */
 366                 : [src] "+a" (r2), [len] "+d" (r3)
 367                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMAC)
 368                 : "cc", "memory");
 369
 370         return src_len - r3;
 371 }
 372
 373 /**
 374  * cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
 375  * @func: the function code passed to KMCTR; see CPACF_KMCTR_xxx defines
 376  * @param: address of parameter block; see POP for details on each func
 377  * @dest: address of destination memory area
 378  * @src: address of source memory area
 379  * @src_len: length of src operand in bytes
 380  * @counter: address of counter value
 381  *
 382  * Returns 0 for the query func, number of processed bytes for
 383  * encryption/decryption funcs
 384  */
 385 static inline int cpacf_kmctr(unsigned long func, void *param, u8 *dest,
 386                               const u8 *src, long src_len, u8 *counter)
 387 {
 388         register unsigned long r0 asm("0") = (unsigned long) func;
 389         register unsigned long r1 asm("1") = (unsigned long) param;
 390         register unsigned long r2 asm("2") = (unsigned long) src;
 391         register unsigned long r3 asm("3") = (unsigned long) src_len;
 392         register unsigned long r4 asm("4") = (unsigned long) dest;
 393         register unsigned long r6 asm("6") = (unsigned long) counter;
 394
 395         asm volatile(
 396                 "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
 397                 "       brc     1,0b\n" /* handle partial completion */
 398                 : [src] "+a" (r2), [len] "+d" (r3),
 399                   [dst] "+a" (r4), [ctr] "+a" (r6)
 400                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMCTR)
 401                 : "cc", "memory");
 402
 403         return src_len - r3;
 404 }
 405
 406 /**
 407  * cpacf_prno() - executes the PRNO (PERFORM RANDOM NUMBER OPERATION)
 408  *                instruction
 409  * @func: the function code passed to PRNO; see CPACF_PRNO_xxx defines
 410  * @param: address of parameter block; see POP for details on each func
 411  * @dest: address of destination memory area
 412  * @dest_len: size of destination memory area in bytes
 413  * @seed: address of seed data
 414  * @seed_len: size of seed data in bytes
 415  */
 416 static inline void cpacf_prno(unsigned long func, void *param,
 417                               u8 *dest, unsigned long dest_len,
 418                               const u8 *seed, unsigned long seed_len)
 419 {
 420         register unsigned long r0 asm("0") = (unsigned long) func;
 421         register unsigned long r1 asm("1") = (unsigned long) param;
 422         register unsigned long r2 asm("2") = (unsigned long) dest;
 423         register unsigned long r3 asm("3") = (unsigned long) dest_len;
 424         register unsigned long r4 asm("4") = (unsigned long) seed;
 425         register unsigned long r5 asm("5") = (unsigned long) seed_len;
 426
 427         asm volatile (
 428                 "0:     .insn   rre,%[opc] << 16,%[dst],%[seed]\n"
 429                 "       brc     1,0b\n"   /* handle partial completion */
 430                 : [dst] "+a" (r2), [dlen] "+d" (r3)
 431                 : [fc] "d" (r0), [pba] "a" (r1),
 432                   [seed] "a" (r4), [slen] "d" (r5), [opc] "i" (CPACF_PRNO)
 433                 : "cc", "memory");
 434 }
 435
 436 /**
 437  * cpacf_trng() - executes the TRNG subfunction of the PRNO instruction
 438  * @ucbuf: buffer for unconditioned data
 439  * @ucbuf_len: amount of unconditioned data to fetch in bytes
 440  * @cbuf: buffer for conditioned data
 441  * @cbuf_len: amount of conditioned data to fetch in bytes
 442  */
 443 static inline void cpacf_trng(u8 *ucbuf, unsigned long ucbuf_len,
 444                               u8 *cbuf, unsigned long cbuf_len)
 445 {
 446         register unsigned long r0 asm("0") = (unsigned long) CPACF_PRNO_TRNG;
 447         register unsigned long r2 asm("2") = (unsigned long) ucbuf;
 448         register unsigned long r3 asm("3") = (unsigned long) ucbuf_len;
 449         register unsigned long r4 asm("4") = (unsigned long) cbuf;
 450         register unsigned long r5 asm("5") = (unsigned long) cbuf_len;
 451
 452         asm volatile (
 453                 "0:     .insn   rre,%[opc] << 16,%[ucbuf],%[cbuf]\n"
 454                 "       brc     1,0b\n"   /* handle partial completion */
 455                 : [ucbuf] "+a" (r2), [ucbuflen] "+d" (r3),
 456                   [cbuf] "+a" (r4), [cbuflen] "+d" (r5)
 457                 : [fc] "d" (r0), [opc] "i" (CPACF_PRNO)
 458                 : "cc", "memory");
 459 }
 460
 461 /**
 462  * cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
 463  *               instruction
 464  * @func: the function code passed to PCC; see CPACF_KM_xxx defines
 465  * @param: address of parameter block; see POP for details on each func
 466  */
 467 static inline void cpacf_pcc(unsigned long func, void *param)
 468 {
 469         register unsigned long r0 asm("0") = (unsigned long) func;
 470         register unsigned long r1 asm("1") = (unsigned long) param;
 471
 472         asm volatile(
 473                 "0:     .insn   rre,%[opc] << 16,0,0\n" /* PCC opcode */
 474                 "       brc     1,0b\n" /* handle partial completion */
 475                 :
 476                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCC)
 477                 : "cc", "memory");
 478 }
 479
 480 /**
 481  * cpacf_pckmo() - executes the PCKMO (PERFORM CRYPTOGRAPHIC KEY
 482  *                MANAGEMENT) instruction
 483  * @func: the function code passed to PCKMO; see CPACF_PCKMO_xxx defines
 484  * @param: address of parameter block; see POP for details on each func
 485  *
 486  * Returns 0.
 487  */
 488 static inline void cpacf_pckmo(long func, void *param)
 489 {
 490         register unsigned long r0 asm("0") = (unsigned long) func;
 491         register unsigned long r1 asm("1") = (unsigned long) param;
 492
 493         asm volatile(
 494                 "       .insn   rre,%[opc] << 16,0,0\n" /* PCKMO opcode */
 495                 :
 496                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCKMO)
 497                 : "cc", "memory");
 498 }
 499
 500 /**
 501  * cpacf_kma() - executes the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
 502  *               instruction
 503  * @func: the function code passed to KMA; see CPACF_KMA_xxx defines
 504  * @param: address of parameter block; see POP for details on each func
 505  * @dest: address of destination memory area
 506  * @src: address of source memory area
 507  * @src_len: length of src operand in bytes
 508  * @aad: address of additional authenticated data memory area
 509  * @aad_len: length of aad operand in bytes
 510  */
 511 static inline void cpacf_kma(unsigned long func, void *param, u8 *dest,
 512                              const u8 *src, unsigned long src_len,
 513                              const u8 *aad, unsigned long aad_len)
 514 {
 515         register unsigned long r0 asm("0") = (unsigned long) func;
 516         register unsigned long r1 asm("1") = (unsigned long) param;
 517         register unsigned long r2 asm("2") = (unsigned long) src;
 518         register unsigned long r3 asm("3") = (unsigned long) src_len;
 519         register unsigned long r4 asm("4") = (unsigned long) aad;
 520         register unsigned long r5 asm("5") = (unsigned long) aad_len;
 521         register unsigned long r6 asm("6") = (unsigned long) dest;
 522
 523         asm volatile(
 524                 "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[aad],0\n"
 525                 "       brc     1,0b\n" /* handle partial completion */
 526                 : [dst] "+a" (r6), [src] "+a" (r2), [slen] "+d" (r3),
 527                   [aad] "+a" (r4), [alen] "+d" (r5)
 528                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMA)
 529                 : "cc", "memory");
 530 }
 531
 532 #endif  /* _ASM_S390_CPACF_H */