| 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 */ |