arch/s390/include/asm/cpacf.h

   1 /*
   2  * CP Assist for Cryptographic Functions (CPACF)
   3  *
   4  * Copyright IBM Corp. 2003, 2016
   5  * Author(s): Thomas Spatzier
   6  *            Jan Glauber
   7  *            Harald Freudenberger (freude@de.ibm.com)
   8  *            Martin Schwidefsky <schwidefsky@de.ibm.com>
   9  */
  10 #ifndef _ASM_S390_CPACF_H
  11 #define _ASM_S390_CPACF_H
  12
  13 #include <asm/facility.h>
  14
  15 /*
  16  * Instruction opcodes for the CPACF instructions
  17  */
  18 #define CPACF_KMAC              0xb91e          /* MSA  */
  19 #define CPACF_KM                0xb92e          /* MSA  */
  20 #define CPACF_KMC               0xb92f          /* MSA  */
  21 #define CPACF_KIMD              0xb93e          /* MSA  */
  22 #define CPACF_KLMD              0xb93f          /* MSA  */
  23 #define CPACF_PCKMO             0xb928          /* MSA3 */
  24 #define CPACF_KMF               0xb92a          /* MSA4 */
  25 #define CPACF_KMO               0xb92b          /* MSA4 */
  26 #define CPACF_PCC               0xb92c          /* MSA4 */
  27 #define CPACF_KMCTR             0xb92d          /* MSA4 */
  28 #define CPACF_PRNO              0xb93c          /* MSA5 */
  29 #define CPACF_KMA               0xb929          /* MSA8 */
  30
  31 /*
  32  * En/decryption modifier bits
  33  */
  34 #define CPACF_ENCRYPT           0x00
  35 #define CPACF_DECRYPT           0x80
  36
  37 /*
  38  * Function codes for the KM (CIPHER MESSAGE) instruction
  39  */
  40 #define CPACF_KM_QUERY          0x00
  41 #define CPACF_KM_DEA            0x01
  42 #define CPACF_KM_TDEA_128       0x02
  43 #define CPACF_KM_TDEA_192       0x03
  44 #define CPACF_KM_AES_128        0x12
  45 #define CPACF_KM_AES_192        0x13
  46 #define CPACF_KM_AES_256        0x14
  47 #define CPACF_KM_PAES_128       0x1a
  48 #define CPACF_KM_PAES_192       0x1b
  49 #define CPACF_KM_PAES_256       0x1c
  50 #define CPACF_KM_XTS_128        0x32
  51 #define CPACF_KM_XTS_256        0x34
  52 #define CPACF_KM_PXTS_128       0x3a
  53 #define CPACF_KM_PXTS_256       0x3c
  54
  55 /*
  56  * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
  57  * instruction
  58  */
  59 #define CPACF_KMC_QUERY         0x00
  60 #define CPACF_KMC_DEA           0x01
  61 #define CPACF_KMC_TDEA_128      0x02
  62 #define CPACF_KMC_TDEA_192      0x03
  63 #define CPACF_KMC_AES_128       0x12
  64 #define CPACF_KMC_AES_192       0x13
  65 #define CPACF_KMC_AES_256       0x14
  66 #define CPACF_KMC_PAES_128      0x1a
  67 #define CPACF_KMC_PAES_192      0x1b
  68 #define CPACF_KMC_PAES_256      0x1c
  69 #define CPACF_KMC_PRNG          0x43
  70
  71 /*
  72  * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
  73  * instruction
  74  */
  75 #define CPACF_KMCTR_QUERY       0x00
  76 #define CPACF_KMCTR_DEA         0x01
  77 #define CPACF_KMCTR_TDEA_128    0x02
  78 #define CPACF_KMCTR_TDEA_192    0x03
  79 #define CPACF_KMCTR_AES_128     0x12
  80 #define CPACF_KMCTR_AES_192     0x13
  81 #define CPACF_KMCTR_AES_256     0x14
  82 #define CPACF_KMCTR_PAES_128    0x1a
  83 #define CPACF_KMCTR_PAES_192    0x1b
  84 #define CPACF_KMCTR_PAES_256    0x1c
  85
  86 /*
  87  * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
  88  * instruction
  89  */
  90 #define CPACF_KIMD_QUERY        0x00
  91 #define CPACF_KIMD_SHA_1        0x01
  92 #define CPACF_KIMD_SHA_256      0x02
  93 #define CPACF_KIMD_SHA_512      0x03
  94 #define CPACF_KIMD_GHASH        0x41
  95
  96 /*
  97  * Function codes for the KLMD (COMPUTE LAST MESSAGE DIGEST)
  98  * instruction
  99  */
 100 #define CPACF_KLMD_QUERY        0x00
 101 #define CPACF_KLMD_SHA_1        0x01
 102 #define CPACF_KLMD_SHA_256      0x02
 103 #define CPACF_KLMD_SHA_512      0x03
 104
 105 /*
 106  * function codes for the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 107  * instruction
 108  */
 109 #define CPACF_KMAC_QUERY        0x00
 110 #define CPACF_KMAC_DEA          0x01
 111 #define CPACF_KMAC_TDEA_128     0x02
 112 #define CPACF_KMAC_TDEA_192     0x03
 113
 114 /*
 115  * Function codes for the PCKMO (PERFORM CRYPTOGRAPHIC KEY MANAGEMENT)
 116  * instruction
 117  */
 118 #define CPACF_PCKMO_QUERY               0x00
 119 #define CPACF_PCKMO_ENC_DES_KEY         0x01
 120 #define CPACF_PCKMO_ENC_TDES_128_KEY    0x02
 121 #define CPACF_PCKMO_ENC_TDES_192_KEY    0x03
 122 #define CPACF_PCKMO_ENC_AES_128_KEY     0x12
 123 #define CPACF_PCKMO_ENC_AES_192_KEY     0x13
 124 #define CPACF_PCKMO_ENC_AES_256_KEY     0x14
 125
 126 /*
 127  * Function codes for the PRNO (PERFORM RANDOM NUMBER OPERATION)
 128  * instruction
 129  */
 130 #define CPACF_PRNO_QUERY                0x00
 131 #define CPACF_PRNO_SHA512_DRNG_GEN      0x03
 132 #define CPACF_PRNO_SHA512_DRNG_SEED     0x83
 133 #define CPACF_PRNO_TRNG_Q_R2C_RATIO     0x70
 134 #define CPACF_PRNO_TRNG                 0x72
 135
 136 typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
 137
 138 /**
 139  * cpacf_query() - check if a specific CPACF function is available
 140  * @opcode: the opcode of the crypto instruction
 141  * @func: the function code to test for
 142  *
 143  * Executes the query function for the given crypto instruction @opcode
 144  * and checks if @func is available
 145  *
 146  * Returns 1 if @func is available for @opcode, 0 otherwise
 147  */
 148 static inline void __cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 149 {
 150         register unsigned long r0 asm("0") = 0; /* query function */
 151         register unsigned long r1 asm("1") = (unsigned long) mask;
 152
 153         asm volatile(
 154                 "       spm 0\n" /* pckmo doesn't change the cc */
 155                 /* Parameter regs are ignored, but must be nonzero and unique */
 156                 "0:     .insn   rrf,%[opc] << 16,2,4,6,0\n"
 157                 "       brc     1,0b\n" /* handle partial completion */
 158                 : "=m" (*mask)
 159                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
 160                 : "cc");
 161 }
 162
 163 static inline int __cpacf_check_opcode(unsigned int opcode)
 164 {
 165         switch (opcode) {
 166         case CPACF_KMAC:
 167         case CPACF_KM:
 168         case CPACF_KMC:
 169         case CPACF_KIMD:
 170         case CPACF_KLMD:
 171                 return test_facility(17);       /* check for MSA */
 172         case CPACF_PCKMO:
 173                 return test_facility(76);       /* check for MSA3 */
 174         case CPACF_KMF:
 175         case CPACF_KMO:
 176         case CPACF_PCC:
 177         case CPACF_KMCTR:
 178                 return test_facility(77);       /* check for MSA4 */
 179         case CPACF_PRNO:
 180                 return test_facility(57);       /* check for MSA5 */
 181         default:
 182                 BUG();
 183         }
 184 }
 185
 186 static inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 187 {
 188         if (__cpacf_check_opcode(opcode)) {
 189                 __cpacf_query(opcode, mask);
 190                 return 1;
 191         }
 192         memset(mask, 0, sizeof(*mask));
 193         return 0;
 194 }
 195
 196 static inline int cpacf_test_func(cpacf_mask_t *mask, unsigned int func)
 197 {
 198         return (mask->bytes[func >> 3] & (0x80 >> (func & 7))) != 0;
 199 }
 200
 201 static inline int cpacf_query_func(unsigned int opcode, unsigned int func)
 202 {
 203         cpacf_mask_t mask;
 204
 205         if (cpacf_query(opcode, &mask))
 206                 return cpacf_test_func(&mask, func);
 207         return 0;
 208 }
 209
 210 /**
 211  * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
 212  * @func: the function code passed to KM; see CPACF_KM_xxx defines
 213  * @param: address of parameter block; see POP for details on each func
 214  * @dest: address of destination memory area
 215  * @src: address of source memory area
 216  * @src_len: length of src operand in bytes
 217  *
 218  * Returns 0 for the query func, number of processed bytes for
 219  * encryption/decryption funcs
 220  */
 221 static inline int cpacf_km(unsigned long func, void *param,
 222                            u8 *dest, const u8 *src, long src_len)
 223 {
 224         register unsigned long r0 asm("0") = (unsigned long) func;
 225         register unsigned long r1 asm("1") = (unsigned long) param;
 226         register unsigned long r2 asm("2") = (unsigned long) src;
 227         register unsigned long r3 asm("3") = (unsigned long) src_len;
 228         register unsigned long r4 asm("4") = (unsigned long) dest;
 229
 230         asm volatile(
 231                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 232                 "       brc     1,0b\n" /* handle partial completion */
 233                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 234                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KM)
 235                 : "cc", "memory");
 236
 237         return src_len - r3;
 238 }
 239
 240 /**
 241  * cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
 242  * @func: the function code passed to KM; see CPACF_KMC_xxx defines
 243  * @param: address of parameter block; see POP for details on each func
 244  * @dest: address of destination memory area
 245  * @src: address of source memory area
 246  * @src_len: length of src operand in bytes
 247  *
 248  * Returns 0 for the query func, number of processed bytes for
 249  * encryption/decryption funcs
 250  */
 251 static inline int cpacf_kmc(unsigned long func, void *param,
 252                             u8 *dest, const u8 *src, long src_len)
 253 {
 254         register unsigned long r0 asm("0") = (unsigned long) func;
 255         register unsigned long r1 asm("1") = (unsigned long) param;
 256         register unsigned long r2 asm("2") = (unsigned long) src;
 257         register unsigned long r3 asm("3") = (unsigned long) src_len;
 258         register unsigned long r4 asm("4") = (unsigned long) dest;
 259
 260         asm volatile(
 261                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 262                 "       brc     1,0b\n" /* handle partial completion */
 263                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 264                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMC)
 265                 : "cc", "memory");
 266
 267         return src_len - r3;
 268 }
 269
 270 /**
 271  * cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
 272  *                instruction
 273  * @func: the function code passed to KM; see CPACF_KIMD_xxx defines
 274  * @param: address of parameter block; see POP for details on each func
 275  * @src: address of source memory area
 276  * @src_len: length of src operand in bytes
 277  */
 278 static inline void cpacf_kimd(unsigned long func, void *param,
 279                               const u8 *src, long src_len)
 280 {
 281         register unsigned long r0 asm("0") = (unsigned long) func;
 282         register unsigned long r1 asm("1") = (unsigned long) param;
 283         register unsigned long r2 asm("2") = (unsigned long) src;
 284         register unsigned long r3 asm("3") = (unsigned long) src_len;
 285
 286         asm volatile(
 287                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 288                 "       brc     1,0b\n" /* handle partial completion */
 289                 : [src] "+a" (r2), [len] "+d" (r3)
 290                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KIMD)
 291                 : "cc", "memory");
 292 }
 293
 294 /**
 295  * cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
 296  * @func: the function code passed to KM; see CPACF_KLMD_xxx defines
 297  * @param: address of parameter block; see POP for details on each func
 298  * @src: address of source memory area
 299  * @src_len: length of src operand in bytes
 300  */
 301 static inline void cpacf_klmd(unsigned long func, void *param,
 302                               const u8 *src, long src_len)
 303 {
 304         register unsigned long r0 asm("0") = (unsigned long) func;
 305         register unsigned long r1 asm("1") = (unsigned long) param;
 306         register unsigned long r2 asm("2") = (unsigned long) src;
 307         register unsigned long r3 asm("3") = (unsigned long) src_len;
 308
 309         asm volatile(
 310                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 311                 "       brc     1,0b\n" /* handle partial completion */
 312                 : [src] "+a" (r2), [len] "+d" (r3)
 313                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KLMD)
 314                 : "cc", "memory");
 315 }
 316
 317 /**
 318  * cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 319  *                instruction
 320  * @func: the function code passed to KM; see CPACF_KMAC_xxx defines
 321  * @param: address of parameter block; see POP for details on each func
 322  * @src: address of source memory area
 323  * @src_len: length of src operand in bytes
 324  *
 325  * Returns 0 for the query func, number of processed bytes for digest funcs
 326  */
 327 static inline int cpacf_kmac(unsigned long func, void *param,
 328                              const u8 *src, long src_len)
 329 {
 330         register unsigned long r0 asm("0") = (unsigned long) func;
 331         register unsigned long r1 asm("1") = (unsigned long) param;
 332         register unsigned long r2 asm("2") = (unsigned long) src;
 333         register unsigned long r3 asm("3") = (unsigned long) src_len;
 334
 335         asm volatile(
 336                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 337                 "       brc     1,0b\n" /* handle partial completion */
 338                 : [src] "+a" (r2), [len] "+d" (r3)
 339                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMAC)
 340                 : "cc", "memory");
 341
 342         return src_len - r3;
 343 }
 344
 345 /**
 346  * cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
 347  * @func: the function code passed to KMCTR; see CPACF_KMCTR_xxx defines
 348  * @param: address of parameter block; see POP for details on each func
 349  * @dest: address of destination memory area
 350  * @src: address of source memory area
 351  * @src_len: length of src operand in bytes
 352  * @counter: address of counter value
 353  *
 354  * Returns 0 for the query func, number of processed bytes for
 355  * encryption/decryption funcs
 356  */
 357 static inline int cpacf_kmctr(unsigned long func, void *param, u8 *dest,
 358                               const u8 *src, long src_len, u8 *counter)
 359 {
 360         register unsigned long r0 asm("0") = (unsigned long) func;
 361         register unsigned long r1 asm("1") = (unsigned long) param;
 362         register unsigned long r2 asm("2") = (unsigned long) src;
 363         register unsigned long r3 asm("3") = (unsigned long) src_len;
 364         register unsigned long r4 asm("4") = (unsigned long) dest;
 365         register unsigned long r6 asm("6") = (unsigned long) counter;
 366
 367         asm volatile(
 368                 "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
 369                 "       brc     1,0b\n" /* handle partial completion */
 370                 : [src] "+a" (r2), [len] "+d" (r3),
 371                   [dst] "+a" (r4), [ctr] "+a" (r6)
 372                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMCTR)
 373                 : "cc", "memory");
 374
 375         return src_len - r3;
 376 }
 377
 378 /**
 379  * cpacf_prno() - executes the PRNO (PERFORM RANDOM NUMBER OPERATION)
 380  *                instruction
 381  * @func: the function code passed to PRNO; see CPACF_PRNO_xxx defines
 382  * @param: address of parameter block; see POP for details on each func
 383  * @dest: address of destination memory area
 384  * @dest_len: size of destination memory area in bytes
 385  * @seed: address of seed data
 386  * @seed_len: size of seed data in bytes
 387  */
 388 static inline void cpacf_prno(unsigned long func, void *param,
 389                               u8 *dest, unsigned long dest_len,
 390                               const u8 *seed, unsigned long seed_len)
 391 {
 392         register unsigned long r0 asm("0") = (unsigned long) func;
 393         register unsigned long r1 asm("1") = (unsigned long) param;
 394         register unsigned long r2 asm("2") = (unsigned long) dest;
 395         register unsigned long r3 asm("3") = (unsigned long) dest_len;
 396         register unsigned long r4 asm("4") = (unsigned long) seed;
 397         register unsigned long r5 asm("5") = (unsigned long) seed_len;
 398
 399         asm volatile (
 400                 "0:     .insn   rre,%[opc] << 16,%[dst],%[seed]\n"
 401                 "       brc     1,0b\n"   /* handle partial completion */
 402                 : [dst] "+a" (r2), [dlen] "+d" (r3)
 403                 : [fc] "d" (r0), [pba] "a" (r1),
 404                   [seed] "a" (r4), [slen] "d" (r5), [opc] "i" (CPACF_PRNO)
 405                 : "cc", "memory");
 406 }
 407
 408 /**
 409  * cpacf_trng() - executes the TRNG subfunction of the PRNO instruction
 410  * @ucbuf: buffer for unconditioned data
 411  * @ucbuf_len: amount of unconditioned data to fetch in bytes
 412  * @cbuf: buffer for conditioned data
 413  * @cbuf_len: amount of conditioned data to fetch in bytes
 414  */
 415 static inline void cpacf_trng(u8 *ucbuf, unsigned long ucbuf_len,
 416                               u8 *cbuf, unsigned long cbuf_len)
 417 {
 418         register unsigned long r0 asm("0") = (unsigned long) CPACF_PRNO_TRNG;
 419         register unsigned long r2 asm("2") = (unsigned long) ucbuf;
 420         register unsigned long r3 asm("3") = (unsigned long) ucbuf_len;
 421         register unsigned long r4 asm("4") = (unsigned long) cbuf;
 422         register unsigned long r5 asm("5") = (unsigned long) cbuf_len;
 423
 424         asm volatile (
 425                 "0:     .insn   rre,%[opc] << 16,%[ucbuf],%[cbuf]\n"
 426                 "       brc     1,0b\n"   /* handle partial completion */
 427                 : [ucbuf] "+a" (r2), [ucbuflen] "+d" (r3),
 428                   [cbuf] "+a" (r4), [cbuflen] "+d" (r5)
 429                 : [fc] "d" (r0), [opc] "i" (CPACF_PRNO)
 430                 : "cc", "memory");
 431 }
 432
 433 /**
 434  * cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
 435  *               instruction
 436  * @func: the function code passed to PCC; see CPACF_KM_xxx defines
 437  * @param: address of parameter block; see POP for details on each func
 438  */
 439 static inline void cpacf_pcc(unsigned long func, void *param)
 440 {
 441         register unsigned long r0 asm("0") = (unsigned long) func;
 442         register unsigned long r1 asm("1") = (unsigned long) param;
 443
 444         asm volatile(
 445                 "0:     .insn   rre,%[opc] << 16,0,0\n" /* PCC opcode */
 446                 "       brc     1,0b\n" /* handle partial completion */
 447                 :
 448                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCC)
 449                 : "cc", "memory");
 450 }
 451
 452 /**
 453  * cpacf_pckmo() - executes the PCKMO (PERFORM CRYPTOGRAPHIC KEY
 454  *                MANAGEMENT) instruction
 455  * @func: the function code passed to PCKMO; see CPACF_PCKMO_xxx defines
 456  * @param: address of parameter block; see POP for details on each func
 457  *
 458  * Returns 0.
 459  */
 460 static inline void cpacf_pckmo(long func, void *param)
 461 {
 462         register unsigned long r0 asm("0") = (unsigned long) func;
 463         register unsigned long r1 asm("1") = (unsigned long) param;
 464
 465         asm volatile(
 466                 "       .insn   rre,%[opc] << 16,0,0\n" /* PCKMO opcode */
 467                 :
 468                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCKMO)
 469                 : "cc", "memory");
 470 }
 471
 472 #endif  /* _ASM_S390_CPACF_H */