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, 2016
   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
  32 /*
  33  * En/decryption modifier bits
  34  */
  35 #define CPACF_ENCRYPT           0x00
  36 #define CPACF_DECRYPT           0x80
  37
  38 /*
  39  * Function codes for the KM (CIPHER MESSAGE) instruction
  40  */
  41 #define CPACF_KM_QUERY          0x00
  42 #define CPACF_KM_DEA            0x01
  43 #define CPACF_KM_TDEA_128       0x02
  44 #define CPACF_KM_TDEA_192       0x03
  45 #define CPACF_KM_AES_128        0x12
  46 #define CPACF_KM_AES_192        0x13
  47 #define CPACF_KM_AES_256        0x14
  48 #define CPACF_KM_PAES_128       0x1a
  49 #define CPACF_KM_PAES_192       0x1b
  50 #define CPACF_KM_PAES_256       0x1c
  51 #define CPACF_KM_XTS_128        0x32
  52 #define CPACF_KM_XTS_256        0x34
  53 #define CPACF_KM_PXTS_128       0x3a
  54 #define CPACF_KM_PXTS_256       0x3c
  55
  56 /*
  57  * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
  58  * instruction
  59  */
  60 #define CPACF_KMC_QUERY         0x00
  61 #define CPACF_KMC_DEA           0x01
  62 #define CPACF_KMC_TDEA_128      0x02
  63 #define CPACF_KMC_TDEA_192      0x03
  64 #define CPACF_KMC_AES_128       0x12
  65 #define CPACF_KMC_AES_192       0x13
  66 #define CPACF_KMC_AES_256       0x14
  67 #define CPACF_KMC_PAES_128      0x1a
  68 #define CPACF_KMC_PAES_192      0x1b
  69 #define CPACF_KMC_PAES_256      0x1c
  70 #define CPACF_KMC_PRNG          0x43
  71
  72 /*
  73  * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
  74  * instruction
  75  */
  76 #define CPACF_KMCTR_QUERY       0x00
  77 #define CPACF_KMCTR_DEA         0x01
  78 #define CPACF_KMCTR_TDEA_128    0x02
  79 #define CPACF_KMCTR_TDEA_192    0x03
  80 #define CPACF_KMCTR_AES_128     0x12
  81 #define CPACF_KMCTR_AES_192     0x13
  82 #define CPACF_KMCTR_AES_256     0x14
  83 #define CPACF_KMCTR_PAES_128    0x1a
  84 #define CPACF_KMCTR_PAES_192    0x1b
  85 #define CPACF_KMCTR_PAES_256    0x1c
  86
  87 /*
  88  * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
  89  * instruction
  90  */
  91 #define CPACF_KIMD_QUERY        0x00
  92 #define CPACF_KIMD_SHA_1        0x01
  93 #define CPACF_KIMD_SHA_256      0x02
  94 #define CPACF_KIMD_SHA_512      0x03
  95 #define CPACF_KIMD_GHASH        0x41
  96
  97 /*
  98  * Function codes for the KLMD (COMPUTE LAST MESSAGE DIGEST)
  99  * instruction
 100  */
 101 #define CPACF_KLMD_QUERY        0x00
 102 #define CPACF_KLMD_SHA_1        0x01
 103 #define CPACF_KLMD_SHA_256      0x02
 104 #define CPACF_KLMD_SHA_512      0x03
 105
 106 /*
 107  * function codes for the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 108  * instruction
 109  */
 110 #define CPACF_KMAC_QUERY        0x00
 111 #define CPACF_KMAC_DEA          0x01
 112 #define CPACF_KMAC_TDEA_128     0x02
 113 #define CPACF_KMAC_TDEA_192     0x03
 114
 115 /*
 116  * Function codes for the PCKMO (PERFORM CRYPTOGRAPHIC KEY MANAGEMENT)
 117  * instruction
 118  */
 119 #define CPACF_PCKMO_QUERY               0x00
 120 #define CPACF_PCKMO_ENC_DES_KEY         0x01
 121 #define CPACF_PCKMO_ENC_TDES_128_KEY    0x02
 122 #define CPACF_PCKMO_ENC_TDES_192_KEY    0x03
 123 #define CPACF_PCKMO_ENC_AES_128_KEY     0x12
 124 #define CPACF_PCKMO_ENC_AES_192_KEY     0x13
 125 #define CPACF_PCKMO_ENC_AES_256_KEY     0x14
 126
 127 /*
 128  * Function codes for the PRNO (PERFORM RANDOM NUMBER OPERATION)
 129  * instruction
 130  */
 131 #define CPACF_PRNO_QUERY                0x00
 132 #define CPACF_PRNO_SHA512_DRNG_GEN      0x03
 133 #define CPACF_PRNO_SHA512_DRNG_SEED     0x83
 134 #define CPACF_PRNO_TRNG_Q_R2C_RATIO     0x70
 135 #define CPACF_PRNO_TRNG                 0x72
 136
 137 typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
 138
 139 /**
 140  * cpacf_query() - check if a specific CPACF function is available
 141  * @opcode: the opcode of the crypto instruction
 142  * @func: the function code to test for
 143  *
 144  * Executes the query function for the given crypto instruction @opcode
 145  * and checks if @func is available
 146  *
 147  * Returns 1 if @func is available for @opcode, 0 otherwise
 148  */
 149 static inline void __cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 150 {
 151         register unsigned long r0 asm("0") = 0; /* query function */
 152         register unsigned long r1 asm("1") = (unsigned long) mask;
 153
 154         asm volatile(
 155                 "       spm 0\n" /* pckmo doesn't change the cc */
 156                 /* Parameter regs are ignored, but must be nonzero and unique */
 157                 "0:     .insn   rrf,%[opc] << 16,2,4,6,0\n"
 158                 "       brc     1,0b\n" /* handle partial completion */
 159                 : "=m" (*mask)
 160                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
 161                 : "cc");
 162 }
 163
 164 static inline int __cpacf_check_opcode(unsigned int opcode)
 165 {
 166         switch (opcode) {
 167         case CPACF_KMAC:
 168         case CPACF_KM:
 169         case CPACF_KMC:
 170         case CPACF_KIMD:
 171         case CPACF_KLMD:
 172                 return test_facility(17);       /* check for MSA */
 173         case CPACF_PCKMO:
 174                 return test_facility(76);       /* check for MSA3 */
 175         case CPACF_KMF:
 176         case CPACF_KMO:
 177         case CPACF_PCC:
 178         case CPACF_KMCTR:
 179                 return test_facility(77);       /* check for MSA4 */
 180         case CPACF_PRNO:
 181                 return test_facility(57);       /* check for MSA5 */
 182         default:
 183                 BUG();
 184         }
 185 }
 186
 187 static inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 188 {
 189         if (__cpacf_check_opcode(opcode)) {
 190                 __cpacf_query(opcode, mask);
 191                 return 1;
 192         }
 193         memset(mask, 0, sizeof(*mask));
 194         return 0;
 195 }
 196
 197 static inline int cpacf_test_func(cpacf_mask_t *mask, unsigned int func)
 198 {
 199         return (mask->bytes[func >> 3] & (0x80 >> (func & 7))) != 0;
 200 }
 201
 202 static inline int cpacf_query_func(unsigned int opcode, unsigned int func)
 203 {
 204         cpacf_mask_t mask;
 205
 206         if (cpacf_query(opcode, &mask))
 207                 return cpacf_test_func(&mask, func);
 208         return 0;
 209 }
 210
 211 /**
 212  * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
 213  * @func: the function code passed to KM; see CPACF_KM_xxx defines
 214  * @param: address of parameter block; see POP for details on each func
 215  * @dest: address of destination memory area
 216  * @src: address of source memory area
 217  * @src_len: length of src operand in bytes
 218  *
 219  * Returns 0 for the query func, number of processed bytes for
 220  * encryption/decryption funcs
 221  */
 222 static inline int cpacf_km(unsigned long func, void *param,
 223                            u8 *dest, const u8 *src, long src_len)
 224 {
 225         register unsigned long r0 asm("0") = (unsigned long) func;
 226         register unsigned long r1 asm("1") = (unsigned long) param;
 227         register unsigned long r2 asm("2") = (unsigned long) src;
 228         register unsigned long r3 asm("3") = (unsigned long) src_len;
 229         register unsigned long r4 asm("4") = (unsigned long) dest;
 230
 231         asm volatile(
 232                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 233                 "       brc     1,0b\n" /* handle partial completion */
 234                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 235                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KM)
 236                 : "cc", "memory");
 237
 238         return src_len - r3;
 239 }
 240
 241 /**
 242  * cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
 243  * @func: the function code passed to KM; see CPACF_KMC_xxx defines
 244  * @param: address of parameter block; see POP for details on each func
 245  * @dest: address of destination memory area
 246  * @src: address of source memory area
 247  * @src_len: length of src operand in bytes
 248  *
 249  * Returns 0 for the query func, number of processed bytes for
 250  * encryption/decryption funcs
 251  */
 252 static inline int cpacf_kmc(unsigned long func, void *param,
 253                             u8 *dest, const u8 *src, long src_len)
 254 {
 255         register unsigned long r0 asm("0") = (unsigned long) func;
 256         register unsigned long r1 asm("1") = (unsigned long) param;
 257         register unsigned long r2 asm("2") = (unsigned long) src;
 258         register unsigned long r3 asm("3") = (unsigned long) src_len;
 259         register unsigned long r4 asm("4") = (unsigned long) dest;
 260
 261         asm volatile(
 262                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 263                 "       brc     1,0b\n" /* handle partial completion */
 264                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 265                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMC)
 266                 : "cc", "memory");
 267
 268         return src_len - r3;
 269 }
 270
 271 /**
 272  * cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
 273  *                instruction
 274  * @func: the function code passed to KM; see CPACF_KIMD_xxx defines
 275  * @param: address of parameter block; see POP for details on each func
 276  * @src: address of source memory area
 277  * @src_len: length of src operand in bytes
 278  */
 279 static inline void cpacf_kimd(unsigned long func, void *param,
 280                               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
 287         asm volatile(
 288                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 289                 "       brc     1,0b\n" /* handle partial completion */
 290                 : [src] "+a" (r2), [len] "+d" (r3)
 291                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KIMD)
 292                 : "cc", "memory");
 293 }
 294
 295 /**
 296  * cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
 297  * @func: the function code passed to KM; see CPACF_KLMD_xxx defines
 298  * @param: address of parameter block; see POP for details on each func
 299  * @src: address of source memory area
 300  * @src_len: length of src operand in bytes
 301  */
 302 static inline void cpacf_klmd(unsigned long func, void *param,
 303                               const u8 *src, long src_len)
 304 {
 305         register unsigned long r0 asm("0") = (unsigned long) func;
 306         register unsigned long r1 asm("1") = (unsigned long) param;
 307         register unsigned long r2 asm("2") = (unsigned long) src;
 308         register unsigned long r3 asm("3") = (unsigned long) src_len;
 309
 310         asm volatile(
 311                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 312                 "       brc     1,0b\n" /* handle partial completion */
 313                 : [src] "+a" (r2), [len] "+d" (r3)
 314                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KLMD)
 315                 : "cc", "memory");
 316 }
 317
 318 /**
 319  * cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 320  *                instruction
 321  * @func: the function code passed to KM; see CPACF_KMAC_xxx defines
 322  * @param: address of parameter block; see POP for details on each func
 323  * @src: address of source memory area
 324  * @src_len: length of src operand in bytes
 325  *
 326  * Returns 0 for the query func, number of processed bytes for digest funcs
 327  */
 328 static inline int cpacf_kmac(unsigned long func, void *param,
 329                              const u8 *src, long src_len)
 330 {
 331         register unsigned long r0 asm("0") = (unsigned long) func;
 332         register unsigned long r1 asm("1") = (unsigned long) param;
 333         register unsigned long r2 asm("2") = (unsigned long) src;
 334         register unsigned long r3 asm("3") = (unsigned long) src_len;
 335
 336         asm volatile(
 337                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 338                 "       brc     1,0b\n" /* handle partial completion */
 339                 : [src] "+a" (r2), [len] "+d" (r3)
 340                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMAC)
 341                 : "cc", "memory");
 342
 343         return src_len - r3;
 344 }
 345
 346 /**
 347  * cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
 348  * @func: the function code passed to KMCTR; see CPACF_KMCTR_xxx defines
 349  * @param: address of parameter block; see POP for details on each func
 350  * @dest: address of destination memory area
 351  * @src: address of source memory area
 352  * @src_len: length of src operand in bytes
 353  * @counter: address of counter value
 354  *
 355  * Returns 0 for the query func, number of processed bytes for
 356  * encryption/decryption funcs
 357  */
 358 static inline int cpacf_kmctr(unsigned long func, void *param, u8 *dest,
 359                               const u8 *src, long src_len, u8 *counter)
 360 {
 361         register unsigned long r0 asm("0") = (unsigned long) func;
 362         register unsigned long r1 asm("1") = (unsigned long) param;
 363         register unsigned long r2 asm("2") = (unsigned long) src;
 364         register unsigned long r3 asm("3") = (unsigned long) src_len;
 365         register unsigned long r4 asm("4") = (unsigned long) dest;
 366         register unsigned long r6 asm("6") = (unsigned long) counter;
 367
 368         asm volatile(
 369                 "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
 370                 "       brc     1,0b\n" /* handle partial completion */
 371                 : [src] "+a" (r2), [len] "+d" (r3),
 372                   [dst] "+a" (r4), [ctr] "+a" (r6)
 373                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMCTR)
 374                 : "cc", "memory");
 375
 376         return src_len - r3;
 377 }
 378
 379 /**
 380  * cpacf_prno() - executes the PRNO (PERFORM RANDOM NUMBER OPERATION)
 381  *                instruction
 382  * @func: the function code passed to PRNO; see CPACF_PRNO_xxx defines
 383  * @param: address of parameter block; see POP for details on each func
 384  * @dest: address of destination memory area
 385  * @dest_len: size of destination memory area in bytes
 386  * @seed: address of seed data
 387  * @seed_len: size of seed data in bytes
 388  */
 389 static inline void cpacf_prno(unsigned long func, void *param,
 390                               u8 *dest, unsigned long dest_len,
 391                               const u8 *seed, unsigned long seed_len)
 392 {
 393         register unsigned long r0 asm("0") = (unsigned long) func;
 394         register unsigned long r1 asm("1") = (unsigned long) param;
 395         register unsigned long r2 asm("2") = (unsigned long) dest;
 396         register unsigned long r3 asm("3") = (unsigned long) dest_len;
 397         register unsigned long r4 asm("4") = (unsigned long) seed;
 398         register unsigned long r5 asm("5") = (unsigned long) seed_len;
 399
 400         asm volatile (
 401                 "0:     .insn   rre,%[opc] << 16,%[dst],%[seed]\n"
 402                 "       brc     1,0b\n"   /* handle partial completion */
 403                 : [dst] "+a" (r2), [dlen] "+d" (r3)
 404                 : [fc] "d" (r0), [pba] "a" (r1),
 405                   [seed] "a" (r4), [slen] "d" (r5), [opc] "i" (CPACF_PRNO)
 406                 : "cc", "memory");
 407 }
 408
 409 /**
 410  * cpacf_trng() - executes the TRNG subfunction of the PRNO instruction
 411  * @ucbuf: buffer for unconditioned data
 412  * @ucbuf_len: amount of unconditioned data to fetch in bytes
 413  * @cbuf: buffer for conditioned data
 414  * @cbuf_len: amount of conditioned data to fetch in bytes
 415  */
 416 static inline void cpacf_trng(u8 *ucbuf, unsigned long ucbuf_len,
 417                               u8 *cbuf, unsigned long cbuf_len)
 418 {
 419         register unsigned long r0 asm("0") = (unsigned long) CPACF_PRNO_TRNG;
 420         register unsigned long r2 asm("2") = (unsigned long) ucbuf;
 421         register unsigned long r3 asm("3") = (unsigned long) ucbuf_len;
 422         register unsigned long r4 asm("4") = (unsigned long) cbuf;
 423         register unsigned long r5 asm("5") = (unsigned long) cbuf_len;
 424
 425         asm volatile (
 426                 "0:     .insn   rre,%[opc] << 16,%[ucbuf],%[cbuf]\n"
 427                 "       brc     1,0b\n"   /* handle partial completion */
 428                 : [ucbuf] "+a" (r2), [ucbuflen] "+d" (r3),
 429                   [cbuf] "+a" (r4), [cbuflen] "+d" (r5)
 430                 : [fc] "d" (r0), [opc] "i" (CPACF_PRNO)
 431                 : "cc", "memory");
 432 }
 433
 434 /**
 435  * cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
 436  *               instruction
 437  * @func: the function code passed to PCC; see CPACF_KM_xxx defines
 438  * @param: address of parameter block; see POP for details on each func
 439  */
 440 static inline void cpacf_pcc(unsigned long func, void *param)
 441 {
 442         register unsigned long r0 asm("0") = (unsigned long) func;
 443         register unsigned long r1 asm("1") = (unsigned long) param;
 444
 445         asm volatile(
 446                 "0:     .insn   rre,%[opc] << 16,0,0\n" /* PCC opcode */
 447                 "       brc     1,0b\n" /* handle partial completion */
 448                 :
 449                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCC)
 450                 : "cc", "memory");
 451 }
 452
 453 /**
 454  * cpacf_pckmo() - executes the PCKMO (PERFORM CRYPTOGRAPHIC KEY
 455  *                MANAGEMENT) instruction
 456  * @func: the function code passed to PCKMO; see CPACF_PCKMO_xxx defines
 457  * @param: address of parameter block; see POP for details on each func
 458  *
 459  * Returns 0.
 460  */
 461 static inline void cpacf_pckmo(long func, void *param)
 462 {
 463         register unsigned long r0 asm("0") = (unsigned long) func;
 464         register unsigned long r1 asm("1") = (unsigned long) param;
 465
 466         asm volatile(
 467                 "       .insn   rre,%[opc] << 16,0,0\n" /* PCKMO opcode */
 468                 :
 469                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCKMO)
 470                 : "cc", "memory");
 471 }
 472
 473 #endif  /* _ASM_S390_CPACF_H */