LXR linux/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 * En/decryption modifier bits
  32 */
  33#define CPACF_ENCRYPT           0x00
  34#define CPACF_DECRYPT           0x80
  35
  36/*
  37 * Function codes for the KM (CIPHER MESSAGE) instruction
  38 */
  39#define CPACF_KM_QUERY          0x00
  40#define CPACF_KM_DEA            0x01
  41#define CPACF_KM_TDEA_128       0x02
  42#define CPACF_KM_TDEA_192       0x03
  43#define CPACF_KM_AES_128        0x12
  44#define CPACF_KM_AES_192        0x13
  45#define CPACF_KM_AES_256        0x14
  46#define CPACF_KM_PAES_128       0x1a
  47#define CPACF_KM_PAES_192       0x1b
  48#define CPACF_KM_PAES_256       0x1c
  49#define CPACF_KM_XTS_128        0x32
  50#define CPACF_KM_XTS_256        0x34
  51#define CPACF_KM_PXTS_128       0x3a
  52#define CPACF_KM_PXTS_256       0x3c
  53
  54/*
  55 * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
  56 * instruction
  57 */
  58#define CPACF_KMC_QUERY         0x00
  59#define CPACF_KMC_DEA           0x01
  60#define CPACF_KMC_TDEA_128      0x02
  61#define CPACF_KMC_TDEA_192      0x03
  62#define CPACF_KMC_AES_128       0x12
  63#define CPACF_KMC_AES_192       0x13
  64#define CPACF_KMC_AES_256       0x14
  65#define CPACF_KMC_PAES_128      0x1a
  66#define CPACF_KMC_PAES_192      0x1b
  67#define CPACF_KMC_PAES_256      0x1c
  68#define CPACF_KMC_PRNG          0x43
  69
  70/*
  71 * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
  72 * instruction
  73 */
  74#define CPACF_KMCTR_QUERY       0x00
  75#define CPACF_KMCTR_DEA         0x01
  76#define CPACF_KMCTR_TDEA_128    0x02
  77#define CPACF_KMCTR_TDEA_192    0x03
  78#define CPACF_KMCTR_AES_128     0x12
  79#define CPACF_KMCTR_AES_192     0x13
  80#define CPACF_KMCTR_AES_256     0x14
  81#define CPACF_KMCTR_PAES_128    0x1a
  82#define CPACF_KMCTR_PAES_192    0x1b
  83#define CPACF_KMCTR_PAES_256    0x1c
  84
  85/*
  86 * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
  87 * instruction
  88 */
  89#define CPACF_KIMD_QUERY        0x00
  90#define CPACF_KIMD_SHA_1        0x01
  91#define CPACF_KIMD_SHA_256      0x02
  92#define CPACF_KIMD_SHA_512      0x03
  93#define CPACF_KIMD_GHASH        0x41
  94
  95/*
  96 * Function codes for the KLMD (COMPUTE LAST MESSAGE DIGEST)
  97 * instruction
  98 */
  99#define CPACF_KLMD_QUERY        0x00
 100#define CPACF_KLMD_SHA_1        0x01
 101#define CPACF_KLMD_SHA_256      0x02
 102#define CPACF_KLMD_SHA_512      0x03
 103
 104/*
 105 * function codes for the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 106 * instruction
 107 */
 108#define CPACF_KMAC_QUERY        0x00
 109#define CPACF_KMAC_DEA          0x01
 110#define CPACF_KMAC_TDEA_128     0x02
 111#define CPACF_KMAC_TDEA_192     0x03
 112
 113/*
 114 * Function codes for the PCKMO (PERFORM CRYPTOGRAPHIC KEY MANAGEMENT)
 115 * instruction
 116 */
 117#define CPACF_PCKMO_QUERY               0x00
 118#define CPACF_PCKMO_ENC_DES_KEY         0x01
 119#define CPACF_PCKMO_ENC_TDES_128_KEY    0x02
 120#define CPACF_PCKMO_ENC_TDES_192_KEY    0x03
 121#define CPACF_PCKMO_ENC_AES_128_KEY     0x12
 122#define CPACF_PCKMO_ENC_AES_192_KEY     0x13
 123#define CPACF_PCKMO_ENC_AES_256_KEY     0x14
 124
 125/*
 126 * Function codes for the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
 127 * instruction
 128 */
 129#define CPACF_PPNO_QUERY                0x00
 130#define CPACF_PPNO_SHA512_DRNG_GEN      0x03
 131#define CPACF_PPNO_SHA512_DRNG_SEED     0x83
 132
 133typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
 134
 135/**
 136 * cpacf_query() - check if a specific CPACF function is available
 137 * @opcode: the opcode of the crypto instruction
 138 * @func: the function code to test for
 139 *
 140 * Executes the query function for the given crypto instruction @opcode
 141 * and checks if @func is available
 142 *
 143 * Returns 1 if @func is available for @opcode, 0 otherwise
 144 */
 145static inline void __cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 146{
 147        register unsigned long r0 asm("0") = 0; /* query function */
 148        register unsigned long r1 asm("1") = (unsigned long) mask;
 149
 150        asm volatile(
 151                "       spm 0\n" /* pckmo doesn't change the cc */
 152                /* Parameter registers are ignored, but may not be 0 */
 153                "0:     .insn   rrf,%[opc] << 16,2,2,2,0\n"
 154                "       brc     1,0b\n" /* handle partial completion */
 155                : "=m" (*mask)
 156                : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
 157                : "cc");
 158}
 159
 160static inline int __cpacf_check_opcode(unsigned int opcode)
 161{
 162        switch (opcode) {
 163        case CPACF_KMAC:
 164        case CPACF_KM:
 165        case CPACF_KMC:
 166        case CPACF_KIMD:
 167        case CPACF_KLMD:
 168                return test_facility(17);       /* check for MSA */
 169        case CPACF_PCKMO:
 170                return test_facility(76);       /* check for MSA3 */
 171        case CPACF_KMF:
 172        case CPACF_KMO:
 173        case CPACF_PCC:
 174        case CPACF_KMCTR:
 175                return test_facility(77);       /* check for MSA4 */
 176        case CPACF_PPNO:
 177                return test_facility(57);       /* check for MSA5 */
 178        default:
 179                BUG();
 180        }
 181}
 182
 183static inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 184{
 185        if (__cpacf_check_opcode(opcode)) {
 186                __cpacf_query(opcode, mask);
 187                return 1;
 188        }
 189        memset(mask, 0, sizeof(*mask));
 190        return 0;
 191}
 192
 193static inline int cpacf_test_func(cpacf_mask_t *mask, unsigned int func)
 194{
 195        return (mask->bytes[func >> 3] & (0x80 >> (func & 7))) != 0;
 196}
 197
 198static inline int cpacf_query_func(unsigned int opcode, unsigned int func)
 199{
 200        cpacf_mask_t mask;
 201
 202        if (cpacf_query(opcode, &mask))
 203                return cpacf_test_func(&mask, func);
 204        return 0;
 205}
 206
 207/**
 208 * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
 209 * @func: the function code passed to KM; see CPACF_KM_xxx defines
 210 * @param: address of parameter block; see POP for details on each func
 211 * @dest: address of destination memory area
 212 * @src: address of source memory area
 213 * @src_len: length of src operand in bytes
 214 *
 215 * Returns 0 for the query func, number of processed bytes for
 216 * encryption/decryption funcs
 217 */
 218static inline int cpacf_km(unsigned long func, void *param,
 219                           u8 *dest, const u8 *src, long src_len)
 220{
 221        register unsigned long r0 asm("0") = (unsigned long) func;
 222        register unsigned long r1 asm("1") = (unsigned long) param;
 223        register unsigned long r2 asm("2") = (unsigned long) src;
 224        register unsigned long r3 asm("3") = (unsigned long) src_len;
 225        register unsigned long r4 asm("4") = (unsigned long) dest;
 226
 227        asm volatile(
 228                "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 229                "       brc     1,0b\n" /* handle partial completion */
 230                : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 231                : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KM)
 232                : "cc", "memory");
 233
 234        return src_len - r3;
 235}
 236
 237/**
 238 * cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
 239 * @func: the function code passed to KM; see CPACF_KMC_xxx defines
 240 * @param: address of parameter block; see POP for details on each func
 241 * @dest: address of destination memory area
 242 * @src: address of source memory area
 243 * @src_len: length of src operand in bytes
 244 *
 245 * Returns 0 for the query func, number of processed bytes for
 246 * encryption/decryption funcs
 247 */
 248static inline int cpacf_kmc(unsigned long func, void *param,
 249                            u8 *dest, const u8 *src, long src_len)
 250{
 251        register unsigned long r0 asm("0") = (unsigned long) func;
 252        register unsigned long r1 asm("1") = (unsigned long) param;
 253        register unsigned long r2 asm("2") = (unsigned long) src;
 254        register unsigned long r3 asm("3") = (unsigned long) src_len;
 255        register unsigned long r4 asm("4") = (unsigned long) dest;
 256
 257        asm volatile(
 258                "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
 259                "       brc     1,0b\n" /* handle partial completion */
 260                : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
 261                : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMC)
 262                : "cc", "memory");
 263
 264        return src_len - r3;
 265}
 266
 267/**
 268 * cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
 269 *                instruction
 270 * @func: the function code passed to KM; see CPACF_KIMD_xxx defines
 271 * @param: address of parameter block; see POP for details on each func
 272 * @src: address of source memory area
 273 * @src_len: length of src operand in bytes
 274 */
 275static inline void cpacf_kimd(unsigned long func, void *param,
 276                              const u8 *src, long src_len)
 277{
 278        register unsigned long r0 asm("0") = (unsigned long) func;
 279        register unsigned long r1 asm("1") = (unsigned long) param;
 280        register unsigned long r2 asm("2") = (unsigned long) src;
 281        register unsigned long r3 asm("3") = (unsigned long) src_len;
 282
 283        asm volatile(
 284                "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 285                "       brc     1,0b\n" /* handle partial completion */
 286                : [src] "+a" (r2), [len] "+d" (r3)
 287                : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KIMD)
 288                : "cc", "memory");
 289}
 290
 291/**
 292 * cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
 293 * @func: the function code passed to KM; see CPACF_KLMD_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 */
 298static inline void cpacf_klmd(unsigned long func, void *param,
 299                              const u8 *src, long src_len)
 300{
 301        register unsigned long r0 asm("0") = (unsigned long) func;
 302        register unsigned long r1 asm("1") = (unsigned long) param;
 303        register unsigned long r2 asm("2") = (unsigned long) src;
 304        register unsigned long r3 asm("3") = (unsigned long) src_len;
 305
 306        asm volatile(
 307                "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 308                "       brc     1,0b\n" /* handle partial completion */
 309                : [src] "+a" (r2), [len] "+d" (r3)
 310                : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KLMD)
 311                : "cc", "memory");
 312}
 313
 314/**
 315 * cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
 316 *                instruction
 317 * @func: the function code passed to KM; see CPACF_KMAC_xxx defines
 318 * @param: address of parameter block; see POP for details on each func
 319 * @src: address of source memory area
 320 * @src_len: length of src operand in bytes
 321 *
 322 * Returns 0 for the query func, number of processed bytes for digest funcs
 323 */
 324static inline int cpacf_kmac(unsigned long func, void *param,
 325                             const u8 *src, long src_len)
 326{
 327        register unsigned long r0 asm("0") = (unsigned long) func;
 328        register unsigned long r1 asm("1") = (unsigned long) param;
 329        register unsigned long r2 asm("2") = (unsigned long) src;
 330        register unsigned long r3 asm("3") = (unsigned long) src_len;
 331
 332        asm volatile(
 333                "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
 334                "       brc     1,0b\n" /* handle partial completion */
 335                : [src] "+a" (r2), [len] "+d" (r3)
 336                : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMAC)
 337                : "cc", "memory");
 338
 339        return src_len - r3;
 340}
 341
 342/**
 343 * cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
 344 * @func: the function code passed to KMCTR; see CPACF_KMCTR_xxx defines
 345 * @param: address of parameter block; see POP for details on each func
 346 * @dest: address of destination memory area
 347 * @src: address of source memory area
 348 * @src_len: length of src operand in bytes
 349 * @counter: address of counter value
 350 *
 351 * Returns 0 for the query func, number of processed bytes for
 352 * encryption/decryption funcs
 353 */
 354static inline int cpacf_kmctr(unsigned long func, void *param, u8 *dest,
 355                              const u8 *src, long src_len, u8 *counter)
 356{
 357        register unsigned long r0 asm("0") = (unsigned long) func;
 358        register unsigned long r1 asm("1") = (unsigned long) param;
 359        register unsigned long r2 asm("2") = (unsigned long) src;
 360        register unsigned long r3 asm("3") = (unsigned long) src_len;
 361        register unsigned long r4 asm("4") = (unsigned long) dest;
 362        register unsigned long r6 asm("6") = (unsigned long) counter;
 363
 364        asm volatile(
 365                "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
 366                "       brc     1,0b\n" /* handle partial completion */
 367                : [src] "+a" (r2), [len] "+d" (r3),
 368                  [dst] "+a" (r4), [ctr] "+a" (r6)
 369                : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMCTR)
 370                : "cc", "memory");
 371
 372        return src_len - r3;
 373}
 374
 375/**
 376 * cpacf_ppno() - executes the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
 377 *                instruction
 378 * @func: the function code passed to PPNO; see CPACF_PPNO_xxx defines
 379 * @param: address of parameter block; see POP for details on each func
 380 * @dest: address of destination memory area
 381 * @dest_len: size of destination memory area in bytes
 382 * @seed: address of seed data
 383 * @seed_len: size of seed data in bytes
 384 */
 385static inline void cpacf_ppno(unsigned long func, void *param,
 386                              u8 *dest, long dest_len,
 387                              const u8 *seed, long seed_len)
 388{
 389        register unsigned long r0 asm("0") = (unsigned long) func;
 390        register unsigned long r1 asm("1") = (unsigned long) param;
 391        register unsigned long r2 asm("2") = (unsigned long) dest;
 392        register unsigned long r3 asm("3") = (unsigned long) dest_len;
 393        register unsigned long r4 asm("4") = (unsigned long) seed;
 394        register unsigned long r5 asm("5") = (unsigned long) seed_len;
 395
 396        asm volatile (
 397                "0:     .insn   rre,%[opc] << 16,%[dst],%[seed]\n"
 398                "       brc     1,0b\n"   /* handle partial completion */
 399                : [dst] "+a" (r2), [dlen] "+d" (r3)
 400                : [fc] "d" (r0), [pba] "a" (r1),
 401                  [seed] "a" (r4), [slen] "d" (r5), [opc] "i" (CPACF_PPNO)
 402                : "cc", "memory");
 403}
 404
 405/**
 406 * cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
 407 *               instruction
 408 * @func: the function code passed to PCC; see CPACF_KM_xxx defines
 409 * @param: address of parameter block; see POP for details on each func
 410 */
 411static inline void cpacf_pcc(unsigned long func, void *param)
 412{
 413        register unsigned long r0 asm("0") = (unsigned long) func;
 414        register unsigned long r1 asm("1") = (unsigned long) param;
 415
 416        asm volatile(
 417                "0:     .insn   rre,%[opc] << 16,0,0\n" /* PCC opcode */
 418                "       brc     1,0b\n" /* handle partial completion */
 419                :
 420                : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCC)
 421                : "cc", "memory");
 422}
 423
 424/**
 425 * cpacf_pckmo() - executes the PCKMO (PERFORM CRYPTOGRAPHIC KEY
 426 *                MANAGEMENT) instruction
 427 * @func: the function code passed to PCKMO; see CPACF_PCKMO_xxx defines
 428 * @param: address of parameter block; see POP for details on each func
 429 *
 430 * Returns 0.
 431 */
 432static inline void cpacf_pckmo(long func, void *param)
 433{
 434        register unsigned long r0 asm("0") = (unsigned long) func;
 435        register unsigned long r1 asm("1") = (unsigned long) param;
 436
 437        asm volatile(
 438                "       .insn   rre,%[opc] << 16,0,0\n" /* PCKMO opcode */
 439                :
 440                : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCKMO)
 441                : "cc", "memory");
 442}
 443
 444#endif  /* _ASM_S390_CPACF_H */
 445