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_PPNO              0xb93c          /* MSA5 */
  29
  30 /*
  31  * Function codes for the KM (CIPHER MESSAGE)
  32  * instruction (0x80 is the decipher modifier bit)
  33  */
  34 #define CPACF_KM_QUERY          0x00
  35 #define CPACF_KM_DEA_ENC        0x01
  36 #define CPACF_KM_DEA_DEC        0x81
  37 #define CPACF_KM_TDEA_128_ENC   0x02
  38 #define CPACF_KM_TDEA_128_DEC   0x82
  39 #define CPACF_KM_TDEA_192_ENC   0x03
  40 #define CPACF_KM_TDEA_192_DEC   0x83
  41 #define CPACF_KM_AES_128_ENC    0x12
  42 #define CPACF_KM_AES_128_DEC    0x92
  43 #define CPACF_KM_AES_192_ENC    0x13
  44 #define CPACF_KM_AES_192_DEC    0x93
  45 #define CPACF_KM_AES_256_ENC    0x14
  46 #define CPACF_KM_AES_256_DEC    0x94
  47 #define CPACF_KM_XTS_128_ENC    0x32
  48 #define CPACF_KM_XTS_128_DEC    0xb2
  49 #define CPACF_KM_XTS_256_ENC    0x34
  50 #define CPACF_KM_XTS_256_DEC    0xb4
  51
  52 /*
  53  * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
  54  * instruction (0x80 is the decipher modifier bit)
  55  */
  56 #define CPACF_KMC_QUERY         0x00
  57 #define CPACF_KMC_DEA_ENC       0x01
  58 #define CPACF_KMC_DEA_DEC       0x81
  59 #define CPACF_KMC_TDEA_128_ENC  0x02
  60 #define CPACF_KMC_TDEA_128_DEC  0x82
  61 #define CPACF_KMC_TDEA_192_ENC  0x03
  62 #define CPACF_KMC_TDEA_192_DEC  0x83
  63 #define CPACF_KMC_AES_128_ENC   0x12
  64 #define CPACF_KMC_AES_128_DEC   0x92
  65 #define CPACF_KMC_AES_192_ENC   0x13
  66 #define CPACF_KMC_AES_192_DEC   0x93
  67 #define CPACF_KMC_AES_256_ENC   0x14
  68 #define CPACF_KMC_AES_256_DEC   0x94
  69 #define CPACF_KMC_PRNG          0x43
  70
  71 /*
  72  * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
  73  * instruction (0x80 is the decipher modifier bit)
  74  */
  75 #define CPACF_KMCTR_QUERY        0x00
  76 #define CPACF_KMCTR_DEA_ENC      0x01
  77 #define CPACF_KMCTR_DEA_DEC      0x81
  78 #define CPACF_KMCTR_TDEA_128_ENC 0x02
  79 #define CPACF_KMCTR_TDEA_128_DEC 0x82
  80 #define CPACF_KMCTR_TDEA_192_ENC 0x03
  81 #define CPACF_KMCTR_TDEA_192_DEC 0x83
  82 #define CPACF_KMCTR_AES_128_ENC  0x12
  83 #define CPACF_KMCTR_AES_128_DEC  0x92
  84 #define CPACF_KMCTR_AES_192_ENC  0x13
  85 #define CPACF_KMCTR_AES_192_DEC  0x93
  86 #define CPACF_KMCTR_AES_256_ENC  0x14
  87 #define CPACF_KMCTR_AES_256_DEC  0x94
  88
  89 /*
  90  * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
  91  * instruction (0x80 is the decipher modifier bit)
  92  */
  93 #define CPACF_KIMD_QUERY        0x00
  94 #define CPACF_KIMD_SHA_1        0x01
  95 #define CPACF_KIMD_SHA_256      0x02
  96 #define CPACF_KIMD_SHA_512      0x03
  97 #define CPACF_KIMD_GHASH        0x41
  98
  99 /*
 100  * Function codes for the KLMD (COMPUTE LAST MESSAGE DIGEST)
 101  * instruction (0x80 is the decipher modifier bit)
 102  */
 103 #define CPACF_KLMD_QUERY        0x00
 104 #define CPACF_KLMD_SHA_1        0x01
 105 #define CPACF_KLMD_SHA_256      0x02
 106 #define CPACF_KLMD_SHA_512      0x03
 107
 108 /*
 109  * function codes for the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 110  * instruction (0x80 is the decipher modifier bit)
 111  */
 112 #define CPACF_KMAC_QUERY        0x00
 113 #define CPACF_KMAC_DEA          0x01
 114 #define CPACF_KMAC_TDEA_128     0x02
 115 #define CPACF_KMAC_TDEA_192     0x03
 116
 117 /*
 118  * Function codes for the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
 119  * instruction (0x80 is the decipher modifier bit)
 120  */
 121 #define CPACF_PPNO_QUERY                0x00
 122 #define CPACF_PPNO_SHA512_DRNG_GEN      0x03
 123 #define CPACF_PPNO_SHA512_DRNG_SEED     0x83
 124
 125 /**
 126  * cpacf_query() - check if a specific CPACF function is available
 127  * @opcode: the opcode of the crypto instruction
 128  * @func: the function code to test for
 129  *
 130  * Executes the query function for the given crypto instruction @opcode
 131  * and checks if @func is available
 132  *
 133  * Returns 1 if @func is available for @opcode, 0 otherwise
 134  */
 135 static inline void __cpacf_query(unsigned int opcode, unsigned char *status)
 136 {
 137         typedef struct { unsigned char _[16]; } status_type;
 138         register unsigned long r0 asm("0") = 0; /* query function */
 139         register unsigned long r1 asm("1") = (unsigned long) status;
 140
 141         asm volatile(
 142                 "       spm 0\n" /* pckmo doesn't change the cc */
 143                 /* Parameter registers are ignored, but may not be 0 */
 144                 "0:     .insn   rrf,%[opc] << 16,2,2,2,0\n"
 145                 "       brc     1,0b\n" /* handle partial completion */
 146                 : "=m" (*(status_type *) status)
 147                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
 148                 : "cc");
 149 }
 150
 151 static inline int cpacf_query(unsigned int opcode, unsigned int func)
 152 {
 153         unsigned char status[16];
 154
 155         switch (opcode) {
 156         case CPACF_KMAC:
 157         case CPACF_KM:
 158         case CPACF_KMC:
 159         case CPACF_KIMD:
 160         case CPACF_KLMD:
 161                 if (!test_facility(17)) /* check for MSA */
 162                         return 0;
 163                 break;
 164         case CPACF_PCKMO:
 165                 if (!test_facility(76)) /* check for MSA3 */
 166                         return 0;
 167                 break;
 168         case CPACF_KMF:
 169         case CPACF_KMO:
 170         case CPACF_PCC:
 171         case CPACF_KMCTR:
 172                 if (!test_facility(77)) /* check for MSA4 */
 173                         return 0;
 174                 break;
 175         case CPACF_PPNO:
 176                 if (!test_facility(57)) /* check for MSA5 */
 177                         return 0;
 178                 break;
 179         default:
 180                 BUG();
 181         }
 182         __cpacf_query(opcode, status);
 183         return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
 184 }
 185
 186 /**
 187  * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
 188  * @func: the function code passed to KM; see CPACF_KM_xxx defines
 189  * @param: address of parameter block; see POP for details on each func
 190  * @dest: address of destination memory area
 191  * @src: address of source memory area
 192  * @src_len: length of src operand in bytes
 193  *
 194  * Returns 0 for the query func, number of processed bytes for
 195  * encryption/decryption funcs
 196  */
 197 static inline int cpacf_km(long func, void *param,
 198                            u8 *dest, const u8 *src, long src_len)
 199 {
 200         register unsigned long r0 asm("0") = (unsigned long) func;
 201         register unsigned long r1 asm("1") = (unsigned long) param;
 202         register unsigned long r2 asm("2") = (unsigned long) src;
 203         register unsigned long r3 asm("3") = (unsigned long) src_len;
 204         register unsigned long r4 asm("4") = (unsigned long) dest;
 205
 206         asm volatile(
 207                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 208                 "       brc     1,0b\n" /* handle partial completion */
 209                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 210                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KM)
 211                 : "cc", "memory");
 212
 213         return src_len - r3;
 214 }
 215
 216 /**
 217  * cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
 218  * @func: the function code passed to KM; see CPACF_KMC_xxx defines
 219  * @param: address of parameter block; see POP for details on each func
 220  * @dest: address of destination memory area
 221  * @src: address of source memory area
 222  * @src_len: length of src operand in bytes
 223  *
 224  * Returns 0 for the query func, number of processed bytes for
 225  * encryption/decryption funcs
 226  */
 227 static inline int cpacf_kmc(long func, void *param,
 228                             u8 *dest, const u8 *src, long src_len)
 229 {
 230         register unsigned long r0 asm("0") = (unsigned long) func;
 231         register unsigned long r1 asm("1") = (unsigned long) param;
 232         register unsigned long r2 asm("2") = (unsigned long) src;
 233         register unsigned long r3 asm("3") = (unsigned long) src_len;
 234         register unsigned long r4 asm("4") = (unsigned long) dest;
 235
 236         asm volatile(
 237                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 238                 "       brc     1,0b\n" /* handle partial completion */
 239                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 240                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMC)
 241                 : "cc", "memory");
 242
 243         return src_len - r3;
 244 }
 245
 246 /**
 247  * cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
 248  *                instruction
 249  * @func: the function code passed to KM; see CPACF_KIMD_xxx defines
 250  * @param: address of parameter block; see POP for details on each func
 251  * @src: address of source memory area
 252  * @src_len: length of src operand in bytes
 253  *
 254  * Returns 0 for the query func, number of processed bytes for digest funcs
 255  */
 256 static inline int cpacf_kimd(long func, void *param,
 257                              const u8 *src, long src_len)
 258 {
 259         register unsigned long r0 asm("0") = (unsigned long) func;
 260         register unsigned long r1 asm("1") = (unsigned long) param;
 261         register unsigned long r2 asm("2") = (unsigned long) src;
 262         register unsigned long r3 asm("3") = (unsigned long) src_len;
 263
 264         asm volatile(
 265                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 266                 "       brc     1,0b\n" /* handle partial completion */
 267                 : [src] "+a" (r2), [len] "+d" (r3)
 268                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KIMD)
 269                 : "cc", "memory");
 270
 271         return src_len - r3;
 272 }
 273
 274 /**
 275  * cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
 276  * @func: the function code passed to KM; see CPACF_KLMD_xxx defines
 277  * @param: address of parameter block; see POP for details on each func
 278  * @src: address of source memory area
 279  * @src_len: length of src operand in bytes
 280  *
 281  * Returns 0 for the query func, number of processed bytes for digest funcs
 282  */
 283 static inline int cpacf_klmd(long func, void *param,
 284                              const u8 *src, long src_len)
 285 {
 286         register unsigned long r0 asm("0") = (unsigned long) func;
 287         register unsigned long r1 asm("1") = (unsigned long) param;
 288         register unsigned long r2 asm("2") = (unsigned long) src;
 289         register unsigned long r3 asm("3") = (unsigned long) src_len;
 290
 291         asm volatile(
 292                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 293                 "       brc     1,0b\n" /* handle partial completion */
 294                 : [src] "+a" (r2), [len] "+d" (r3)
 295                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KLMD)
 296                 : "cc", "memory");
 297
 298         return src_len - r3;
 299 }
 300
 301 /**
 302  * cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 303  *                instruction
 304  * @func: the function code passed to KM; see CPACF_KMAC_xxx defines
 305  * @param: address of parameter block; see POP for details on each func
 306  * @src: address of source memory area
 307  * @src_len: length of src operand in bytes
 308  *
 309  * Returns 0 for the query func, number of processed bytes for digest funcs
 310  */
 311 static inline int cpacf_kmac(long func, void *param,
 312                              const u8 *src, long src_len)
 313 {
 314         register unsigned long r0 asm("0") = (unsigned long) func;
 315         register unsigned long r1 asm("1") = (unsigned long) param;
 316         register unsigned long r2 asm("2") = (unsigned long) src;
 317         register unsigned long r3 asm("3") = (unsigned long) src_len;
 318
 319         asm volatile(
 320                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 321                 "       brc     1,0b\n" /* handle partial completion */
 322                 : [src] "+a" (r2), [len] "+d" (r3)
 323                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMAC)
 324                 : "cc", "memory");
 325
 326         return src_len - r3;
 327 }
 328
 329 /**
 330  * cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
 331  * @func: the function code passed to KMCTR; see CPACF_KMCTR_xxx defines
 332  * @param: address of parameter block; see POP for details on each func
 333  * @dest: address of destination memory area
 334  * @src: address of source memory area
 335  * @src_len: length of src operand in bytes
 336  * @counter: address of counter value
 337  *
 338  * Returns 0 for the query func, number of processed bytes for
 339  * encryption/decryption funcs
 340  */
 341 static inline int cpacf_kmctr(long func, void *param, u8 *dest,
 342                               const u8 *src, long src_len, u8 *counter)
 343 {
 344         register unsigned long r0 asm("0") = (unsigned long) func;
 345         register unsigned long r1 asm("1") = (unsigned long) param;
 346         register unsigned long r2 asm("2") = (unsigned long) src;
 347         register unsigned long r3 asm("3") = (unsigned long) src_len;
 348         register unsigned long r4 asm("4") = (unsigned long) dest;
 349         register unsigned long r6 asm("6") = (unsigned long) counter;
 350
 351         asm volatile(
 352                 "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
 353                 "       brc     1,0b\n" /* handle partial completion */
 354                 : [src] "+a" (r2), [len] "+d" (r3),
 355                   [dst] "+a" (r4), [ctr] "+a" (r6)
 356                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMCTR)
 357                 : "cc", "memory");
 358
 359         return src_len - r3;
 360 }
 361
 362 /**
 363  * cpacf_ppno() - executes the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
 364  *                instruction
 365  * @func: the function code passed to PPNO; see CPACF_PPNO_xxx defines
 366  * @param: address of parameter block; see POP for details on each func
 367  * @dest: address of destination memory area
 368  * @dest_len: size of destination memory area in bytes
 369  * @seed: address of seed data
 370  * @seed_len: size of seed data in bytes
 371  *
 372  * Returns 0 for the query func, number of random bytes stored in
 373  * dest buffer for generate function
 374  */
 375 static inline int cpacf_ppno(long func, void *param,
 376                              u8 *dest, long dest_len,
 377                              const u8 *seed, long seed_len)
 378 {
 379         register unsigned long r0 asm("0") = (unsigned long) func;
 380         register unsigned long r1 asm("1") = (unsigned long) param;
 381         register unsigned long r2 asm("2") = (unsigned long) dest;
 382         register unsigned long r3 asm("3") = (unsigned long) dest_len;
 383         register unsigned long r4 asm("4") = (unsigned long) seed;
 384         register unsigned long r5 asm("5") = (unsigned long) seed_len;
 385
 386         asm volatile (
 387                 "0:     .insn   rre,%[opc] << 16,%[dst],%[seed]\n"
 388                 "       brc     1,0b\n"   /* handle partial completion */
 389                 : [dst] "+a" (r2), [dlen] "+d" (r3)
 390                 : [fc] "d" (r0), [pba] "a" (r1),
 391                   [seed] "a" (r4), [slen] "d" (r5), [opc] "i" (CPACF_PPNO)
 392                 : "cc", "memory");
 393
 394         return dest_len - r3;
 395 }
 396
 397 /**
 398  * cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
 399  *               instruction
 400  * @func: the function code passed to PCC; see CPACF_KM_xxx defines
 401  * @param: address of parameter block; see POP for details on each func
 402  *
 403  * Returns 0.
 404  */
 405 static inline int cpacf_pcc(long func, void *param)
 406 {
 407         register unsigned long r0 asm("0") = (unsigned long) func;
 408         register unsigned long r1 asm("1") = (unsigned long) param;
 409
 410         asm volatile(
 411                 "0:     .insn   rre,%[opc] << 16,0,0\n" /* PCC opcode */
 412                 "       brc     1,0b\n" /* handle partial completion */
 413                 :
 414                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCC)
 415                 : "cc", "memory");
 416
 417         return 0;
 418 }
 419
 420 #endif  /* _ASM_S390_CPACF_H */