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_PCC               0xb92c          /* MSA4 */
  24 #define CPACF_KMCTR             0xb92d          /* MSA4 */
  25 #define CPACF_PPNO              0xb93c          /* MSA5 */
  26
  27 /*
  28  * Function codes for the KM (CIPHER MESSAGE)
  29  * instruction (0x80 is the decipher modifier bit)
  30  */
  31 #define CPACF_KM_QUERY          0x00
  32 #define CPACF_KM_DEA_ENC        0x01
  33 #define CPACF_KM_DEA_DEC        0x81
  34 #define CPACF_KM_TDEA_128_ENC   0x02
  35 #define CPACF_KM_TDEA_128_DEC   0x82
  36 #define CPACF_KM_TDEA_192_ENC   0x03
  37 #define CPACF_KM_TDEA_192_DEC   0x83
  38 #define CPACF_KM_AES_128_ENC    0x12
  39 #define CPACF_KM_AES_128_DEC    0x92
  40 #define CPACF_KM_AES_192_ENC    0x13
  41 #define CPACF_KM_AES_192_DEC    0x93
  42 #define CPACF_KM_AES_256_ENC    0x14
  43 #define CPACF_KM_AES_256_DEC    0x94
  44 #define CPACF_KM_XTS_128_ENC    0x32
  45 #define CPACF_KM_XTS_128_DEC    0xb2
  46 #define CPACF_KM_XTS_256_ENC    0x34
  47 #define CPACF_KM_XTS_256_DEC    0xb4
  48
  49 /*
  50  * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
  51  * instruction (0x80 is the decipher modifier bit)
  52  */
  53 #define CPACF_KMC_QUERY         0x00
  54 #define CPACF_KMC_DEA_ENC       0x01
  55 #define CPACF_KMC_DEA_DEC       0x81
  56 #define CPACF_KMC_TDEA_128_ENC  0x02
  57 #define CPACF_KMC_TDEA_128_DEC  0x82
  58 #define CPACF_KMC_TDEA_192_ENC  0x03
  59 #define CPACF_KMC_TDEA_192_DEC  0x83
  60 #define CPACF_KMC_AES_128_ENC   0x12
  61 #define CPACF_KMC_AES_128_DEC   0x92
  62 #define CPACF_KMC_AES_192_ENC   0x13
  63 #define CPACF_KMC_AES_192_DEC   0x93
  64 #define CPACF_KMC_AES_256_ENC   0x14
  65 #define CPACF_KMC_AES_256_DEC   0x94
  66 #define CPACF_KMC_PRNG          0x43
  67
  68 /*
  69  * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
  70  * instruction (0x80 is the decipher modifier bit)
  71  */
  72 #define CPACF_KMCTR_QUERY        0x00
  73 #define CPACF_KMCTR_DEA_ENC      0x01
  74 #define CPACF_KMCTR_DEA_DEC      0x81
  75 #define CPACF_KMCTR_TDEA_128_ENC 0x02
  76 #define CPACF_KMCTR_TDEA_128_DEC 0x82
  77 #define CPACF_KMCTR_TDEA_192_ENC 0x03
  78 #define CPACF_KMCTR_TDEA_192_DEC 0x83
  79 #define CPACF_KMCTR_AES_128_ENC  0x12
  80 #define CPACF_KMCTR_AES_128_DEC  0x92
  81 #define CPACF_KMCTR_AES_192_ENC  0x13
  82 #define CPACF_KMCTR_AES_192_DEC  0x93
  83 #define CPACF_KMCTR_AES_256_ENC  0x14
  84 #define CPACF_KMCTR_AES_256_DEC  0x94
  85
  86 /*
  87  * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
  88  * instruction (0x80 is the decipher modifier bit)
  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 (0x80 is the decipher modifier bit)
  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 (0x80 is the decipher modifier bit)
 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 PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
 116  * instruction (0x80 is the decipher modifier bit)
 117  */
 118 #define CPACF_PPNO_QUERY                0x00
 119 #define CPACF_PPNO_SHA512_DRNG_GEN      0x03
 120 #define CPACF_PPNO_SHA512_DRNG_SEED     0x83
 121
 122 /**
 123  * cpacf_query() - check if a specific CPACF function is available
 124  * @opcode: the opcode of the crypto instruction
 125  * @func: the function code to test for
 126  *
 127  * Executes the query function for the given crypto instruction @opcode
 128  * and checks if @func is available
 129  *
 130  * Returns 1 if @func is available for @opcode, 0 otherwise
 131  */
 132 static inline void __cpacf_query(unsigned int opcode, unsigned char *status)
 133 {
 134         typedef struct { unsigned char _[16]; } status_type;
 135         register unsigned long r0 asm("0") = 0; /* query function */
 136         register unsigned long r1 asm("1") = (unsigned long) status;
 137
 138         asm volatile(
 139                 /* Parameter registers are ignored, but may not be 0 */
 140                 "0:     .insn   rrf,%[opc] << 16,2,2,2,0\n"
 141                 "       brc     1,0b\n" /* handle partial completion */
 142                 : "=m" (*(status_type *) status)
 143                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
 144                 : "cc");
 145 }
 146
 147 static inline int cpacf_query(unsigned int opcode, unsigned int func)
 148 {
 149         unsigned char status[16];
 150
 151         switch (opcode) {
 152         case CPACF_KMAC:
 153         case CPACF_KM:
 154         case CPACF_KMC:
 155         case CPACF_KIMD:
 156         case CPACF_KLMD:
 157                 if (!test_facility(17)) /* check for MSA */
 158                         return 0;
 159                 break;
 160         case CPACF_PCC:
 161         case CPACF_KMCTR:
 162                 if (!test_facility(77)) /* check for MSA4 */
 163                         return 0;
 164                 break;
 165         case CPACF_PPNO:
 166                 if (!test_facility(57)) /* check for MSA5 */
 167                         return 0;
 168                 break;
 169         default:
 170                 BUG();
 171         }
 172         __cpacf_query(opcode, status);
 173         return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
 174 }
 175
 176 /**
 177  * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
 178  * @func: the function code passed to KM; see CPACF_KM_xxx defines
 179  * @param: address of parameter block; see POP for details on each func
 180  * @dest: address of destination memory area
 181  * @src: address of source memory area
 182  * @src_len: length of src operand in bytes
 183  *
 184  * Returns 0 for the query func, number of processed bytes for
 185  * encryption/decryption funcs
 186  */
 187 static inline int cpacf_km(long func, void *param,
 188                            u8 *dest, const u8 *src, long src_len)
 189 {
 190         register unsigned long r0 asm("0") = (unsigned long) func;
 191         register unsigned long r1 asm("1") = (unsigned long) param;
 192         register unsigned long r2 asm("2") = (unsigned long) src;
 193         register unsigned long r3 asm("3") = (unsigned long) src_len;
 194         register unsigned long r4 asm("4") = (unsigned long) dest;
 195
 196         asm volatile(
 197                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 198                 "       brc     1,0b\n" /* handle partial completion */
 199                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 200                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KM)
 201                 : "cc", "memory");
 202
 203         return src_len - r3;
 204 }
 205
 206 /**
 207  * cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
 208  * @func: the function code passed to KM; see CPACF_KMC_xxx defines
 209  * @param: address of parameter block; see POP for details on each func
 210  * @dest: address of destination memory area
 211  * @src: address of source memory area
 212  * @src_len: length of src operand in bytes
 213  *
 214  * Returns 0 for the query func, number of processed bytes for
 215  * encryption/decryption funcs
 216  */
 217 static inline int cpacf_kmc(long func, void *param,
 218                             u8 *dest, const u8 *src, long src_len)
 219 {
 220         register unsigned long r0 asm("0") = (unsigned long) func;
 221         register unsigned long r1 asm("1") = (unsigned long) param;
 222         register unsigned long r2 asm("2") = (unsigned long) src;
 223         register unsigned long r3 asm("3") = (unsigned long) src_len;
 224         register unsigned long r4 asm("4") = (unsigned long) dest;
 225
 226         asm volatile(
 227                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 228                 "       brc     1,0b\n" /* handle partial completion */
 229                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 230                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMC)
 231                 : "cc", "memory");
 232
 233         return src_len - r3;
 234 }
 235
 236 /**
 237  * cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
 238  *                instruction
 239  * @func: the function code passed to KM; see CPACF_KIMD_xxx defines
 240  * @param: address of parameter block; see POP for details on each func
 241  * @src: address of source memory area
 242  * @src_len: length of src operand in bytes
 243  *
 244  * Returns 0 for the query func, number of processed bytes for digest funcs
 245  */
 246 static inline int cpacf_kimd(long func, void *param,
 247                              const u8 *src, long src_len)
 248 {
 249         register unsigned long r0 asm("0") = (unsigned long) func;
 250         register unsigned long r1 asm("1") = (unsigned long) param;
 251         register unsigned long r2 asm("2") = (unsigned long) src;
 252         register unsigned long r3 asm("3") = (unsigned long) src_len;
 253
 254         asm volatile(
 255                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 256                 "       brc     1,0b\n" /* handle partial completion */
 257                 : [src] "+a" (r2), [len] "+d" (r3)
 258                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KIMD)
 259                 : "cc", "memory");
 260
 261         return src_len - r3;
 262 }
 263
 264 /**
 265  * cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
 266  * @func: the function code passed to KM; see CPACF_KLMD_xxx defines
 267  * @param: address of parameter block; see POP for details on each func
 268  * @src: address of source memory area
 269  * @src_len: length of src operand in bytes
 270  *
 271  * Returns 0 for the query func, number of processed bytes for digest funcs
 272  */
 273 static inline int cpacf_klmd(long func, void *param,
 274                              const u8 *src, long src_len)
 275 {
 276         register unsigned long r0 asm("0") = (unsigned long) func;
 277         register unsigned long r1 asm("1") = (unsigned long) param;
 278         register unsigned long r2 asm("2") = (unsigned long) src;
 279         register unsigned long r3 asm("3") = (unsigned long) src_len;
 280
 281         asm volatile(
 282                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 283                 "       brc     1,0b\n" /* handle partial completion */
 284                 : [src] "+a" (r2), [len] "+d" (r3)
 285                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KLMD)
 286                 : "cc", "memory");
 287
 288         return src_len - r3;
 289 }
 290
 291 /**
 292  * cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 293  *                instruction
 294  * @func: the function code passed to KM; see CPACF_KMAC_xxx defines
 295  * @param: address of parameter block; see POP for details on each func
 296  * @src: address of source memory area
 297  * @src_len: length of src operand in bytes
 298  *
 299  * Returns 0 for the query func, number of processed bytes for digest funcs
 300  */
 301 static inline int cpacf_kmac(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_KMAC)
 314                 : "cc", "memory");
 315
 316         return src_len - r3;
 317 }
 318
 319 /**
 320  * cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
 321  * @func: the function code passed to KMCTR; see CPACF_KMCTR_xxx defines
 322  * @param: address of parameter block; see POP for details on each func
 323  * @dest: address of destination memory area
 324  * @src: address of source memory area
 325  * @src_len: length of src operand in bytes
 326  * @counter: address of counter value
 327  *
 328  * Returns 0 for the query func, number of processed bytes for
 329  * encryption/decryption funcs
 330  */
 331 static inline int cpacf_kmctr(long func, void *param, u8 *dest,
 332                               const u8 *src, long src_len, u8 *counter)
 333 {
 334         register unsigned long r0 asm("0") = (unsigned long) func;
 335         register unsigned long r1 asm("1") = (unsigned long) param;
 336         register unsigned long r2 asm("2") = (unsigned long) src;
 337         register unsigned long r3 asm("3") = (unsigned long) src_len;
 338         register unsigned long r4 asm("4") = (unsigned long) dest;
 339         register unsigned long r6 asm("6") = (unsigned long) counter;
 340
 341         asm volatile(
 342                 "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
 343                 "       brc     1,0b\n" /* handle partial completion */
 344                 : [src] "+a" (r2), [len] "+d" (r3),
 345                   [dst] "+a" (r4), [ctr] "+a" (r6)
 346                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMCTR)
 347                 : "cc", "memory");
 348
 349         return src_len - r3;
 350 }
 351
 352 /**
 353  * cpacf_ppno() - executes the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
 354  *                instruction
 355  * @func: the function code passed to PPNO; see CPACF_PPNO_xxx defines
 356  * @param: address of parameter block; see POP for details on each func
 357  * @dest: address of destination memory area
 358  * @dest_len: size of destination memory area in bytes
 359  * @seed: address of seed data
 360  * @seed_len: size of seed data in bytes
 361  *
 362  * Returns 0 for the query func, number of random bytes stored in
 363  * dest buffer for generate function
 364  */
 365 static inline int cpacf_ppno(long func, void *param,
 366                              u8 *dest, long dest_len,
 367                              const u8 *seed, long seed_len)
 368 {
 369         register unsigned long r0 asm("0") = (unsigned long) func;
 370         register unsigned long r1 asm("1") = (unsigned long) param;
 371         register unsigned long r2 asm("2") = (unsigned long) dest;
 372         register unsigned long r3 asm("3") = (unsigned long) dest_len;
 373         register unsigned long r4 asm("4") = (unsigned long) seed;
 374         register unsigned long r5 asm("5") = (unsigned long) seed_len;
 375
 376         asm volatile (
 377                 "0:     .insn   rre,%[opc] << 16,%[dst],%[seed]\n"
 378                 "       brc     1,0b\n"   /* handle partial completion */
 379                 : [dst] "+a" (r2), [dlen] "+d" (r3)
 380                 : [fc] "d" (r0), [pba] "a" (r1),
 381                   [seed] "a" (r4), [slen] "d" (r5), [opc] "i" (CPACF_PPNO)
 382                 : "cc", "memory");
 383
 384         return dest_len - r3;
 385 }
 386
 387 /**
 388  * cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
 389  *               instruction
 390  * @func: the function code passed to PCC; see CPACF_KM_xxx defines
 391  * @param: address of parameter block; see POP for details on each func
 392  *
 393  * Returns 0.
 394  */
 395 static inline int cpacf_pcc(long func, void *param)
 396 {
 397         register unsigned long r0 asm("0") = (unsigned long) func;
 398         register unsigned long r1 asm("1") = (unsigned long) param;
 399
 400         asm volatile(
 401                 "0:     .insn   rre,%[opc] << 16,0,0\n" /* PCC opcode */
 402                 "       brc     1,0b\n" /* handle partial completion */
 403                 :
 404                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCC)
 405                 : "cc", "memory");
 406
 407         return 0;
 408 }
 409
 410 #endif  /* _ASM_S390_CPACF_H */