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  * Decryption modifier bit
  32  */
  33 #define CPACF_DECRYPT           0x80
  34
  35 /*
  36  * Function codes for the KM (CIPHER MESSAGE) instruction
  37  */
  38 #define CPACF_KM_QUERY          0x00
  39 #define CPACF_KM_DEA            0x01
  40 #define CPACF_KM_TDEA_128       0x02
  41 #define CPACF_KM_TDEA_192       0x03
  42 #define CPACF_KM_AES_128        0x12
  43 #define CPACF_KM_AES_192        0x13
  44 #define CPACF_KM_AES_256        0x14
  45 #define CPACF_KM_XTS_128        0x32
  46 #define CPACF_KM_XTS_256        0x34
  47
  48 /*
  49  * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
  50  * instruction
  51  */
  52 #define CPACF_KMC_QUERY         0x00
  53 #define CPACF_KMC_DEA           0x01
  54 #define CPACF_KMC_TDEA_128      0x02
  55 #define CPACF_KMC_TDEA_192      0x03
  56 #define CPACF_KMC_AES_128       0x12
  57 #define CPACF_KMC_AES_192       0x13
  58 #define CPACF_KMC_AES_256       0x14
  59 #define CPACF_KMC_PRNG          0x43
  60
  61 /*
  62  * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
  63  * instruction
  64  */
  65 #define CPACF_KMCTR_QUERY       0x00
  66 #define CPACF_KMCTR_DEA         0x01
  67 #define CPACF_KMCTR_TDEA_128    0x02
  68 #define CPACF_KMCTR_TDEA_192    0x03
  69 #define CPACF_KMCTR_AES_128     0x12
  70 #define CPACF_KMCTR_AES_192     0x13
  71 #define CPACF_KMCTR_AES_256     0x14
  72
  73 /*
  74  * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
  75  * instruction
  76  */
  77 #define CPACF_KIMD_QUERY        0x00
  78 #define CPACF_KIMD_SHA_1        0x01
  79 #define CPACF_KIMD_SHA_256      0x02
  80 #define CPACF_KIMD_SHA_512      0x03
  81 #define CPACF_KIMD_GHASH        0x41
  82
  83 /*
  84  * Function codes for the KLMD (COMPUTE LAST MESSAGE DIGEST)
  85  * instruction
  86  */
  87 #define CPACF_KLMD_QUERY        0x00
  88 #define CPACF_KLMD_SHA_1        0x01
  89 #define CPACF_KLMD_SHA_256      0x02
  90 #define CPACF_KLMD_SHA_512      0x03
  91
  92 /*
  93  * function codes for the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
  94  * instruction
  95  */
  96 #define CPACF_KMAC_QUERY        0x00
  97 #define CPACF_KMAC_DEA          0x01
  98 #define CPACF_KMAC_TDEA_128     0x02
  99 #define CPACF_KMAC_TDEA_192     0x03
 100
 101 /*
 102  * Function codes for the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
 103  * instruction
 104  */
 105 #define CPACF_PPNO_QUERY                0x00
 106 #define CPACF_PPNO_SHA512_DRNG_GEN      0x03
 107 #define CPACF_PPNO_SHA512_DRNG_SEED     0x83
 108
 109 typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
 110
 111 /**
 112  * cpacf_query() - check if a specific CPACF function is available
 113  * @opcode: the opcode of the crypto instruction
 114  * @func: the function code to test for
 115  *
 116  * Executes the query function for the given crypto instruction @opcode
 117  * and checks if @func is available
 118  *
 119  * Returns 1 if @func is available for @opcode, 0 otherwise
 120  */
 121 static inline void __cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 122 {
 123         register unsigned long r0 asm("0") = 0; /* query function */
 124         register unsigned long r1 asm("1") = (unsigned long) mask;
 125
 126         asm volatile(
 127                 "       spm 0\n" /* pckmo doesn't change the cc */
 128                 /* Parameter registers are ignored, but may not be 0 */
 129                 "0:     .insn   rrf,%[opc] << 16,2,2,2,0\n"
 130                 "       brc     1,0b\n" /* handle partial completion */
 131                 : "=m" (*mask)
 132                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
 133                 : "cc");
 134 }
 135
 136 static inline int __cpacf_check_opcode(unsigned int opcode)
 137 {
 138         switch (opcode) {
 139         case CPACF_KMAC:
 140         case CPACF_KM:
 141         case CPACF_KMC:
 142         case CPACF_KIMD:
 143         case CPACF_KLMD:
 144                 return test_facility(17);       /* check for MSA */
 145         case CPACF_PCKMO:
 146                 return test_facility(76);       /* check for MSA3 */
 147         case CPACF_KMF:
 148         case CPACF_KMO:
 149         case CPACF_PCC:
 150         case CPACF_KMCTR:
 151                 return test_facility(77);       /* check for MSA4 */
 152         case CPACF_PPNO:
 153                 return test_facility(57);       /* check for MSA5 */
 154         default:
 155                 BUG();
 156         }
 157 }
 158
 159 static inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 160 {
 161         if (__cpacf_check_opcode(opcode)) {
 162                 __cpacf_query(opcode, mask);
 163                 return 1;
 164         }
 165         memset(mask, 0, sizeof(*mask));
 166         return 0;
 167 }
 168
 169 static inline int cpacf_test_func(cpacf_mask_t *mask, unsigned int func)
 170 {
 171         return (mask->bytes[func >> 3] & (0x80 >> (func & 7))) != 0;
 172 }
 173
 174 static inline int cpacf_query_func(unsigned int opcode, unsigned int func)
 175 {
 176         cpacf_mask_t mask;
 177
 178         if (cpacf_query(opcode, &mask))
 179                 return cpacf_test_func(&mask, func);
 180         return 0;
 181 }
 182
 183 /**
 184  * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
 185  * @func: the function code passed to KM; see CPACF_KM_xxx defines
 186  * @param: address of parameter block; see POP for details on each func
 187  * @dest: address of destination memory area
 188  * @src: address of source memory area
 189  * @src_len: length of src operand in bytes
 190  *
 191  * Returns 0 for the query func, number of processed bytes for
 192  * encryption/decryption funcs
 193  */
 194 static inline int cpacf_km(unsigned long func, void *param,
 195                            u8 *dest, const u8 *src, long src_len)
 196 {
 197         register unsigned long r0 asm("0") = (unsigned long) func;
 198         register unsigned long r1 asm("1") = (unsigned long) param;
 199         register unsigned long r2 asm("2") = (unsigned long) src;
 200         register unsigned long r3 asm("3") = (unsigned long) src_len;
 201         register unsigned long r4 asm("4") = (unsigned long) dest;
 202
 203         asm volatile(
 204                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 205                 "       brc     1,0b\n" /* handle partial completion */
 206                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 207                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KM)
 208                 : "cc", "memory");
 209
 210         return src_len - r3;
 211 }
 212
 213 /**
 214  * cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
 215  * @func: the function code passed to KM; see CPACF_KMC_xxx defines
 216  * @param: address of parameter block; see POP for details on each func
 217  * @dest: address of destination memory area
 218  * @src: address of source memory area
 219  * @src_len: length of src operand in bytes
 220  *
 221  * Returns 0 for the query func, number of processed bytes for
 222  * encryption/decryption funcs
 223  */
 224 static inline int cpacf_kmc(unsigned long func, void *param,
 225                             u8 *dest, const u8 *src, long src_len)
 226 {
 227         register unsigned long r0 asm("0") = (unsigned long) func;
 228         register unsigned long r1 asm("1") = (unsigned long) param;
 229         register unsigned long r2 asm("2") = (unsigned long) src;
 230         register unsigned long r3 asm("3") = (unsigned long) src_len;
 231         register unsigned long r4 asm("4") = (unsigned long) dest;
 232
 233         asm volatile(
 234                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 235                 "       brc     1,0b\n" /* handle partial completion */
 236                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 237                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMC)
 238                 : "cc", "memory");
 239
 240         return src_len - r3;
 241 }
 242
 243 /**
 244  * cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
 245  *                instruction
 246  * @func: the function code passed to KM; see CPACF_KIMD_xxx defines
 247  * @param: address of parameter block; see POP for details on each func
 248  * @src: address of source memory area
 249  * @src_len: length of src operand in bytes
 250  */
 251 static inline void cpacf_kimd(unsigned long func, void *param,
 252                               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
 259         asm volatile(
 260                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 261                 "       brc     1,0b\n" /* handle partial completion */
 262                 : [src] "+a" (r2), [len] "+d" (r3)
 263                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KIMD)
 264                 : "cc", "memory");
 265 }
 266
 267 /**
 268  * cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
 269  * @func: the function code passed to KM; see CPACF_KLMD_xxx defines
 270  * @param: address of parameter block; see POP for details on each func
 271  * @src: address of source memory area
 272  * @src_len: length of src operand in bytes
 273  */
 274 static inline void cpacf_klmd(unsigned long func, void *param,
 275                               const u8 *src, long src_len)
 276 {
 277         register unsigned long r0 asm("0") = (unsigned long) func;
 278         register unsigned long r1 asm("1") = (unsigned long) param;
 279         register unsigned long r2 asm("2") = (unsigned long) src;
 280         register unsigned long r3 asm("3") = (unsigned long) src_len;
 281
 282         asm volatile(
 283                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 284                 "       brc     1,0b\n" /* handle partial completion */
 285                 : [src] "+a" (r2), [len] "+d" (r3)
 286                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KLMD)
 287                 : "cc", "memory");
 288 }
 289
 290 /**
 291  * cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 292  *                instruction
 293  * @func: the function code passed to KM; see CPACF_KMAC_xxx defines
 294  * @param: address of parameter block; see POP for details on each func
 295  * @src: address of source memory area
 296  * @src_len: length of src operand in bytes
 297  *
 298  * Returns 0 for the query func, number of processed bytes for digest funcs
 299  */
 300 static inline int cpacf_kmac(unsigned long func, void *param,
 301                              const u8 *src, long src_len)
 302 {
 303         register unsigned long r0 asm("0") = (unsigned long) func;
 304         register unsigned long r1 asm("1") = (unsigned long) param;
 305         register unsigned long r2 asm("2") = (unsigned long) src;
 306         register unsigned long r3 asm("3") = (unsigned long) src_len;
 307
 308         asm volatile(
 309                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 310                 "       brc     1,0b\n" /* handle partial completion */
 311                 : [src] "+a" (r2), [len] "+d" (r3)
 312                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMAC)
 313                 : "cc", "memory");
 314
 315         return src_len - r3;
 316 }
 317
 318 /**
 319  * cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
 320  * @func: the function code passed to KMCTR; see CPACF_KMCTR_xxx defines
 321  * @param: address of parameter block; see POP for details on each func
 322  * @dest: address of destination memory area
 323  * @src: address of source memory area
 324  * @src_len: length of src operand in bytes
 325  * @counter: address of counter value
 326  *
 327  * Returns 0 for the query func, number of processed bytes for
 328  * encryption/decryption funcs
 329  */
 330 static inline int cpacf_kmctr(unsigned long func, void *param, u8 *dest,
 331                               const u8 *src, long src_len, u8 *counter)
 332 {
 333         register unsigned long r0 asm("0") = (unsigned long) func;
 334         register unsigned long r1 asm("1") = (unsigned long) param;
 335         register unsigned long r2 asm("2") = (unsigned long) src;
 336         register unsigned long r3 asm("3") = (unsigned long) src_len;
 337         register unsigned long r4 asm("4") = (unsigned long) dest;
 338         register unsigned long r6 asm("6") = (unsigned long) counter;
 339
 340         asm volatile(
 341                 "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
 342                 "       brc     1,0b\n" /* handle partial completion */
 343                 : [src] "+a" (r2), [len] "+d" (r3),
 344                   [dst] "+a" (r4), [ctr] "+a" (r6)
 345                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMCTR)
 346                 : "cc", "memory");
 347
 348         return src_len - r3;
 349 }
 350
 351 /**
 352  * cpacf_ppno() - executes the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
 353  *                instruction
 354  * @func: the function code passed to PPNO; see CPACF_PPNO_xxx defines
 355  * @param: address of parameter block; see POP for details on each func
 356  * @dest: address of destination memory area
 357  * @dest_len: size of destination memory area in bytes
 358  * @seed: address of seed data
 359  * @seed_len: size of seed data in bytes
 360  */
 361 static inline void cpacf_ppno(unsigned long func, void *param,
 362                               u8 *dest, long dest_len,
 363                               const u8 *seed, long seed_len)
 364 {
 365         register unsigned long r0 asm("0") = (unsigned long) func;
 366         register unsigned long r1 asm("1") = (unsigned long) param;
 367         register unsigned long r2 asm("2") = (unsigned long) dest;
 368         register unsigned long r3 asm("3") = (unsigned long) dest_len;
 369         register unsigned long r4 asm("4") = (unsigned long) seed;
 370         register unsigned long r5 asm("5") = (unsigned long) seed_len;
 371
 372         asm volatile (
 373                 "0:     .insn   rre,%[opc] << 16,%[dst],%[seed]\n"
 374                 "       brc     1,0b\n"   /* handle partial completion */
 375                 : [dst] "+a" (r2), [dlen] "+d" (r3)
 376                 : [fc] "d" (r0), [pba] "a" (r1),
 377                   [seed] "a" (r4), [slen] "d" (r5), [opc] "i" (CPACF_PPNO)
 378                 : "cc", "memory");
 379 }
 380
 381 /**
 382  * cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
 383  *               instruction
 384  * @func: the function code passed to PCC; see CPACF_KM_xxx defines
 385  * @param: address of parameter block; see POP for details on each func
 386  */
 387 static inline void cpacf_pcc(unsigned long func, void *param)
 388 {
 389         register unsigned long r0 asm("0") = (unsigned long) func;
 390         register unsigned long r1 asm("1") = (unsigned long) param;
 391
 392         asm volatile(
 393                 "0:     .insn   rre,%[opc] << 16,0,0\n" /* PCC opcode */
 394                 "       brc     1,0b\n" /* handle partial completion */
 395                 :
 396                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCC)
 397                 : "cc", "memory");
 398 }
 399
 400 #endif  /* _ASM_S390_CPACF_H */