1 /* 2 * CPU models for s390x 3 * 4 * Copyright 2016 IBM Corp. 5 * 6 * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com> 7 * 8 * This work is licensed under the terms of the GNU GPL, version 2 or (at 9 * your option) any later version. See the COPYING file in the top-level 10 * directory. 11 */ 12 13 #include "qemu/osdep.h" 14 #include "cpu.h" 15 #include "s390x-internal.h" 16 #include "kvm/kvm_s390x.h" 17 #include "sysemu/kvm.h" 18 #include "sysemu/tcg.h" 19 #include "qapi/error.h" 20 #include "qapi/visitor.h" 21 #include "qemu/module.h" 22 #include "qemu/hw-version.h" 23 #include "qemu/qemu-print.h" 24 #ifndef CONFIG_USER_ONLY 25 #include "sysemu/sysemu.h" 26 #endif 27 #include "hw/s390x/pv.h" 28 29 #define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \ 30 { \ 31 .name = _name, \ 32 .type = _type, \ 33 .gen = _gen, \ 34 .ec_ga = _ec_ga, \ 35 .mha_pow = _mha_pow, \ 36 .hmfai = _hmfai, \ 37 .desc = _desc, \ 38 .base_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _BASE }, \ 39 .default_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _DEFAULT }, \ 40 .full_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _FULL }, \ 41 } 42 43 /* 44 * CPU definition list in order of release. Up to generation 14 base features 45 * of a following release have been a superset of the previous release. With 46 * generation 15 one base feature and one optional feature have been deprecated. 47 */ 48 static S390CPUDef s390_cpu_defs[] = { 49 CPUDEF_INIT(0x2064, 7, 1, 38, 0x00000000U, "z900", "IBM zSeries 900 GA1"), 50 CPUDEF_INIT(0x2064, 7, 2, 38, 0x00000000U, "z900.2", "IBM zSeries 900 GA2"), 51 CPUDEF_INIT(0x2064, 7, 3, 38, 0x00000000U, "z900.3", "IBM zSeries 900 GA3"), 52 CPUDEF_INIT(0x2066, 7, 3, 38, 0x00000000U, "z800", "IBM zSeries 800 GA1"), 53 CPUDEF_INIT(0x2084, 8, 1, 38, 0x00000000U, "z990", "IBM zSeries 990 GA1"), 54 CPUDEF_INIT(0x2084, 8, 2, 38, 0x00000000U, "z990.2", "IBM zSeries 990 GA2"), 55 CPUDEF_INIT(0x2084, 8, 3, 38, 0x00000000U, "z990.3", "IBM zSeries 990 GA3"), 56 CPUDEF_INIT(0x2086, 8, 3, 38, 0x00000000U, "z890", "IBM zSeries 880 GA1"), 57 CPUDEF_INIT(0x2084, 8, 4, 38, 0x00000000U, "z990.4", "IBM zSeries 990 GA4"), 58 CPUDEF_INIT(0x2086, 8, 4, 38, 0x00000000U, "z890.2", "IBM zSeries 880 GA2"), 59 CPUDEF_INIT(0x2084, 8, 5, 38, 0x00000000U, "z990.5", "IBM zSeries 990 GA5"), 60 CPUDEF_INIT(0x2086, 8, 5, 38, 0x00000000U, "z890.3", "IBM zSeries 880 GA3"), 61 CPUDEF_INIT(0x2094, 9, 1, 40, 0x00000000U, "z9EC", "IBM System z9 EC GA1"), 62 CPUDEF_INIT(0x2094, 9, 2, 40, 0x00000000U, "z9EC.2", "IBM System z9 EC GA2"), 63 CPUDEF_INIT(0x2096, 9, 2, 40, 0x00000000U, "z9BC", "IBM System z9 BC GA1"), 64 CPUDEF_INIT(0x2094, 9, 3, 40, 0x00000000U, "z9EC.3", "IBM System z9 EC GA3"), 65 CPUDEF_INIT(0x2096, 9, 3, 40, 0x00000000U, "z9BC.2", "IBM System z9 BC GA2"), 66 CPUDEF_INIT(0x2097, 10, 1, 43, 0x00000000U, "z10EC", "IBM System z10 EC GA1"), 67 CPUDEF_INIT(0x2097, 10, 2, 43, 0x00000000U, "z10EC.2", "IBM System z10 EC GA2"), 68 CPUDEF_INIT(0x2098, 10, 2, 43, 0x00000000U, "z10BC", "IBM System z10 BC GA1"), 69 CPUDEF_INIT(0x2097, 10, 3, 43, 0x00000000U, "z10EC.3", "IBM System z10 EC GA3"), 70 CPUDEF_INIT(0x2098, 10, 3, 43, 0x00000000U, "z10BC.2", "IBM System z10 BC GA2"), 71 CPUDEF_INIT(0x2817, 11, 1, 44, 0x08000000U, "z196", "IBM zEnterprise 196 GA1"), 72 CPUDEF_INIT(0x2817, 11, 2, 44, 0x08000000U, "z196.2", "IBM zEnterprise 196 GA2"), 73 CPUDEF_INIT(0x2818, 11, 2, 44, 0x08000000U, "z114", "IBM zEnterprise 114 GA1"), 74 CPUDEF_INIT(0x2827, 12, 1, 44, 0x08000000U, "zEC12", "IBM zEnterprise EC12 GA1"), 75 CPUDEF_INIT(0x2827, 12, 2, 44, 0x08000000U, "zEC12.2", "IBM zEnterprise EC12 GA2"), 76 CPUDEF_INIT(0x2828, 12, 2, 44, 0x08000000U, "zBC12", "IBM zEnterprise BC12 GA1"), 77 CPUDEF_INIT(0x2964, 13, 1, 47, 0x08000000U, "z13", "IBM z13 GA1"), 78 CPUDEF_INIT(0x2964, 13, 2, 47, 0x08000000U, "z13.2", "IBM z13 GA2"), 79 CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"), 80 CPUDEF_INIT(0x3906, 14, 1, 47, 0x08000000U, "z14", "IBM z14 GA1"), 81 CPUDEF_INIT(0x3906, 14, 2, 47, 0x08000000U, "z14.2", "IBM z14 GA2"), 82 CPUDEF_INIT(0x3907, 14, 1, 47, 0x08000000U, "z14ZR1", "IBM z14 Model ZR1 GA1"), 83 CPUDEF_INIT(0x8561, 15, 1, 47, 0x08000000U, "gen15a", "IBM z15 T01 GA1"), 84 CPUDEF_INIT(0x8562, 15, 1, 47, 0x08000000U, "gen15b", "IBM z15 T02 GA1"), 85 CPUDEF_INIT(0x3931, 16, 1, 47, 0x08000000U, "gen16a", "IBM 3931 GA1"), 86 CPUDEF_INIT(0x3932, 16, 1, 47, 0x08000000U, "gen16b", "IBM 3932 GA1"), 87 }; 88 89 #define QEMU_MAX_CPU_TYPE 0x8561 90 #define QEMU_MAX_CPU_GEN 15 91 #define QEMU_MAX_CPU_EC_GA 1 92 static S390FeatBitmap qemu_max_cpu_feat; 93 94 /* features part of a base model but not relevant for finding a base model */ 95 S390FeatBitmap ignored_base_feat; 96 97 void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat) 98 { 99 const S390CPUDef *def; 100 101 def = s390_find_cpu_def(0, gen, ec_ga, NULL); 102 clear_bit(feat, (unsigned long *)&def->default_feat); 103 } 104 105 void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat) 106 { 107 int i; 108 109 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 110 const S390CPUDef *def = &s390_cpu_defs[i]; 111 112 if (def->gen < gen) { 113 continue; 114 } 115 if (def->gen == gen && def->ec_ga < ec_ga) { 116 continue; 117 } 118 119 clear_bit(feat, (unsigned long *)&def->default_feat); 120 } 121 } 122 123 void s390_cpudef_group_featoff_greater(uint8_t gen, uint8_t ec_ga, 124 S390FeatGroup group) 125 { 126 const S390FeatGroupDef *group_def = s390_feat_group_def(group); 127 S390FeatBitmap group_def_off; 128 int i; 129 130 bitmap_complement(group_def_off, group_def->feat, S390_FEAT_MAX); 131 132 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 133 const S390CPUDef *cpu_def = &s390_cpu_defs[i]; 134 135 if (cpu_def->gen < gen) { 136 continue; 137 } 138 if (cpu_def->gen == gen && cpu_def->ec_ga < ec_ga) { 139 continue; 140 } 141 142 bitmap_and((unsigned long *)&cpu_def->default_feat, 143 cpu_def->default_feat, group_def_off, S390_FEAT_MAX); 144 } 145 } 146 147 uint32_t s390_get_hmfai(void) 148 { 149 static S390CPU *cpu; 150 151 if (!cpu) { 152 cpu = S390_CPU(qemu_get_cpu(0)); 153 } 154 155 if (!cpu || !cpu->model) { 156 return 0; 157 } 158 return cpu->model->def->hmfai; 159 } 160 161 uint8_t s390_get_mha_pow(void) 162 { 163 static S390CPU *cpu; 164 165 if (!cpu) { 166 cpu = S390_CPU(qemu_get_cpu(0)); 167 } 168 169 if (!cpu || !cpu->model) { 170 return 0; 171 } 172 return cpu->model->def->mha_pow; 173 } 174 175 uint32_t s390_get_ibc_val(void) 176 { 177 uint16_t unblocked_ibc, lowest_ibc; 178 static S390CPU *cpu; 179 180 if (!cpu) { 181 cpu = S390_CPU(qemu_get_cpu(0)); 182 } 183 184 if (!cpu || !cpu->model) { 185 return 0; 186 } 187 unblocked_ibc = s390_ibc_from_cpu_model(cpu->model); 188 lowest_ibc = cpu->model->lowest_ibc; 189 /* the lowest_ibc always has to be <= unblocked_ibc */ 190 if (!lowest_ibc || lowest_ibc > unblocked_ibc) { 191 return 0; 192 } 193 return ((uint32_t) lowest_ibc << 16) | unblocked_ibc; 194 } 195 196 void s390_get_feat_block(S390FeatType type, uint8_t *data) 197 { 198 static S390CPU *cpu; 199 200 if (!cpu) { 201 cpu = S390_CPU(qemu_get_cpu(0)); 202 } 203 204 if (!cpu || !cpu->model) { 205 return; 206 } 207 s390_fill_feat_block(cpu->model->features, type, data); 208 } 209 210 bool s390_has_feat(S390Feat feat) 211 { 212 static S390CPU *cpu; 213 214 if (!cpu) { 215 cpu = S390_CPU(qemu_get_cpu(0)); 216 } 217 218 if (!cpu || !cpu->model) { 219 #ifdef CONFIG_KVM 220 if (kvm_enabled()) { 221 if (feat == S390_FEAT_VECTOR) { 222 return kvm_check_extension(kvm_state, 223 KVM_CAP_S390_VECTOR_REGISTERS); 224 } 225 if (feat == S390_FEAT_RUNTIME_INSTRUMENTATION) { 226 return kvm_s390_get_ri(); 227 } 228 if (feat == S390_FEAT_MSA_EXT_3) { 229 return true; 230 } 231 } 232 #endif 233 if (feat == S390_FEAT_ZPCI) { 234 return true; 235 } 236 return 0; 237 } 238 239 if (s390_is_pv()) { 240 switch (feat) { 241 case S390_FEAT_DIAG_318: 242 case S390_FEAT_HPMA2: 243 case S390_FEAT_SIE_F2: 244 case S390_FEAT_SIE_SKEY: 245 case S390_FEAT_SIE_GPERE: 246 case S390_FEAT_SIE_SIIF: 247 case S390_FEAT_SIE_SIGPIF: 248 case S390_FEAT_SIE_IB: 249 case S390_FEAT_SIE_CEI: 250 case S390_FEAT_SIE_KSS: 251 case S390_FEAT_SIE_GSLS: 252 case S390_FEAT_SIE_64BSCAO: 253 case S390_FEAT_SIE_CMMA: 254 case S390_FEAT_SIE_PFMFI: 255 case S390_FEAT_SIE_IBS: 256 return false; 257 break; 258 default: 259 break; 260 } 261 } 262 return test_bit(feat, cpu->model->features); 263 } 264 265 uint8_t s390_get_gen_for_cpu_type(uint16_t type) 266 { 267 int i; 268 269 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 270 if (s390_cpu_defs[i].type == type) { 271 return s390_cpu_defs[i].gen; 272 } 273 } 274 return 0; 275 } 276 277 const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga, 278 S390FeatBitmap features) 279 { 280 const S390CPUDef *last_compatible = NULL; 281 const S390CPUDef *matching_cpu_type = NULL; 282 int i; 283 284 if (!gen) { 285 ec_ga = 0; 286 } 287 if (!gen && type) { 288 gen = s390_get_gen_for_cpu_type(type); 289 } 290 291 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 292 const S390CPUDef *def = &s390_cpu_defs[i]; 293 S390FeatBitmap missing; 294 295 /* don't even try newer generations if we know the generation */ 296 if (gen) { 297 if (def->gen > gen) { 298 break; 299 } else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) { 300 break; 301 } 302 } 303 304 if (features) { 305 /* see if the model satisfies the minimum features */ 306 bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX); 307 /* 308 * Ignore certain features that are in the base model, but not 309 * relevant for the search (esp. MSA subfunctions). 310 */ 311 bitmap_andnot(missing, missing, ignored_base_feat, S390_FEAT_MAX); 312 if (!bitmap_empty(missing, S390_FEAT_MAX)) { 313 break; 314 } 315 } 316 317 /* stop the search if we found the exact model */ 318 if (def->type == type && def->ec_ga == ec_ga) { 319 return def; 320 } 321 /* remember if we've at least seen one with the same cpu type */ 322 if (def->type == type) { 323 matching_cpu_type = def; 324 } 325 last_compatible = def; 326 } 327 /* prefer the model with the same cpu type, esp. don't take the BC for EC */ 328 if (matching_cpu_type) { 329 return matching_cpu_type; 330 } 331 return last_compatible; 332 } 333 334 static void s390_print_cpu_model_list_entry(gpointer data, gpointer user_data) 335 { 336 const S390CPUClass *scc = S390_CPU_CLASS((ObjectClass *)data); 337 char *name = g_strdup(object_class_get_name((ObjectClass *)data)); 338 const char *details = ""; 339 340 if (scc->is_static) { 341 details = "(static, migration-safe)"; 342 } else if (scc->is_migration_safe) { 343 details = "(migration-safe)"; 344 } 345 346 /* strip off the -s390x-cpu */ 347 g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0; 348 qemu_printf("s390 %-15s %-35s %s\n", name, scc->desc, details); 349 g_free(name); 350 } 351 352 static gint s390_cpu_list_compare(gconstpointer a, gconstpointer b) 353 { 354 const S390CPUClass *cc_a = S390_CPU_CLASS((ObjectClass *)a); 355 const S390CPUClass *cc_b = S390_CPU_CLASS((ObjectClass *)b); 356 const char *name_a = object_class_get_name((ObjectClass *)a); 357 const char *name_b = object_class_get_name((ObjectClass *)b); 358 359 /* 360 * Move qemu, host and max to the top of the list, qemu first, host second, 361 * max third. 362 */ 363 if (name_a[0] == 'q') { 364 return -1; 365 } else if (name_b[0] == 'q') { 366 return 1; 367 } else if (name_a[0] == 'h') { 368 return -1; 369 } else if (name_b[0] == 'h') { 370 return 1; 371 } else if (name_a[0] == 'm') { 372 return -1; 373 } else if (name_b[0] == 'm') { 374 return 1; 375 } 376 377 /* keep the same order we have in our table (sorted by release date) */ 378 if (cc_a->cpu_def != cc_b->cpu_def) { 379 return cc_a->cpu_def - cc_b->cpu_def; 380 } 381 382 /* exact same definition - list base model first */ 383 return cc_a->is_static ? -1 : 1; 384 } 385 386 void s390_cpu_list(void) 387 { 388 S390FeatGroup group; 389 S390Feat feat; 390 GSList *list; 391 392 list = object_class_get_list(TYPE_S390_CPU, false); 393 list = g_slist_sort(list, s390_cpu_list_compare); 394 g_slist_foreach(list, s390_print_cpu_model_list_entry, NULL); 395 g_slist_free(list); 396 397 qemu_printf("\nRecognized feature flags:\n"); 398 for (feat = 0; feat < S390_FEAT_MAX; feat++) { 399 const S390FeatDef *def = s390_feat_def(feat); 400 401 qemu_printf("%-20s %s\n", def->name, def->desc); 402 } 403 404 qemu_printf("\nRecognized feature groups:\n"); 405 for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { 406 const S390FeatGroupDef *def = s390_feat_group_def(group); 407 408 qemu_printf("%-20s %s\n", def->name, def->desc); 409 } 410 } 411 412 static void check_consistency(const S390CPUModel *model) 413 { 414 static int dep[][2] = { 415 { S390_FEAT_IPTE_RANGE, S390_FEAT_DAT_ENH }, 416 { S390_FEAT_IDTE_SEGMENT, S390_FEAT_DAT_ENH }, 417 { S390_FEAT_IDTE_REGION, S390_FEAT_DAT_ENH }, 418 { S390_FEAT_IDTE_REGION, S390_FEAT_IDTE_SEGMENT }, 419 { S390_FEAT_LOCAL_TLB_CLEARING, S390_FEAT_DAT_ENH}, 420 { S390_FEAT_LONG_DISPLACEMENT_FAST, S390_FEAT_LONG_DISPLACEMENT }, 421 { S390_FEAT_DFP_FAST, S390_FEAT_DFP }, 422 { S390_FEAT_TRANSACTIONAL_EXE, S390_FEAT_STFLE_49 }, 423 { S390_FEAT_EDAT_2, S390_FEAT_EDAT}, 424 { S390_FEAT_MSA_EXT_5, S390_FEAT_KIMD_SHA_512 }, 425 { S390_FEAT_MSA_EXT_5, S390_FEAT_KLMD_SHA_512 }, 426 { S390_FEAT_MSA_EXT_4, S390_FEAT_MSA_EXT_3 }, 427 { S390_FEAT_SIE_CMMA, S390_FEAT_CMM }, 428 { S390_FEAT_SIE_CMMA, S390_FEAT_SIE_GSLS }, 429 { S390_FEAT_SIE_PFMFI, S390_FEAT_EDAT }, 430 { S390_FEAT_MSA_EXT_8, S390_FEAT_MSA_EXT_3 }, 431 { S390_FEAT_MSA_EXT_9, S390_FEAT_MSA_EXT_3 }, 432 { S390_FEAT_MSA_EXT_9, S390_FEAT_MSA_EXT_4 }, 433 { S390_FEAT_MULTIPLE_EPOCH, S390_FEAT_TOD_CLOCK_STEERING }, 434 { S390_FEAT_VECTOR_PACKED_DECIMAL, S390_FEAT_VECTOR }, 435 { S390_FEAT_VECTOR_PACKED_DECIMAL_ENH, S390_FEAT_VECTOR_PACKED_DECIMAL }, 436 { S390_FEAT_VECTOR_PACKED_DECIMAL_ENH2, S390_FEAT_VECTOR_PACKED_DECIMAL_ENH }, 437 { S390_FEAT_VECTOR_ENH, S390_FEAT_VECTOR }, 438 { S390_FEAT_INSTRUCTION_EXEC_PROT, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2 }, 439 { S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2, S390_FEAT_ESOP }, 440 { S390_FEAT_CMM_NT, S390_FEAT_CMM }, 441 { S390_FEAT_GUARDED_STORAGE, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2 }, 442 { S390_FEAT_MULTIPLE_EPOCH, S390_FEAT_STORE_CLOCK_FAST }, 443 { S390_FEAT_MULTIPLE_EPOCH, S390_FEAT_TOD_CLOCK_STEERING }, 444 { S390_FEAT_SEMAPHORE_ASSIST, S390_FEAT_STFLE_49 }, 445 { S390_FEAT_KIMD_SHA3_224, S390_FEAT_MSA }, 446 { S390_FEAT_KIMD_SHA3_256, S390_FEAT_MSA }, 447 { S390_FEAT_KIMD_SHA3_384, S390_FEAT_MSA }, 448 { S390_FEAT_KIMD_SHA3_512, S390_FEAT_MSA }, 449 { S390_FEAT_KIMD_SHAKE_128, S390_FEAT_MSA }, 450 { S390_FEAT_KIMD_SHAKE_256, S390_FEAT_MSA }, 451 { S390_FEAT_KLMD_SHA3_224, S390_FEAT_MSA }, 452 { S390_FEAT_KLMD_SHA3_256, S390_FEAT_MSA }, 453 { S390_FEAT_KLMD_SHA3_384, S390_FEAT_MSA }, 454 { S390_FEAT_KLMD_SHA3_512, S390_FEAT_MSA }, 455 { S390_FEAT_KLMD_SHAKE_128, S390_FEAT_MSA }, 456 { S390_FEAT_KLMD_SHAKE_256, S390_FEAT_MSA }, 457 { S390_FEAT_PRNO_TRNG_QRTCR, S390_FEAT_MSA_EXT_5 }, 458 { S390_FEAT_PRNO_TRNG, S390_FEAT_MSA_EXT_5 }, 459 { S390_FEAT_SIE_KSS, S390_FEAT_SIE_F2 }, 460 { S390_FEAT_AP_QUERY_CONFIG_INFO, S390_FEAT_AP }, 461 { S390_FEAT_AP_FACILITIES_TEST, S390_FEAT_AP }, 462 { S390_FEAT_PTFF_QSIE, S390_FEAT_MULTIPLE_EPOCH }, 463 { S390_FEAT_PTFF_QTOUE, S390_FEAT_MULTIPLE_EPOCH }, 464 { S390_FEAT_PTFF_STOE, S390_FEAT_MULTIPLE_EPOCH }, 465 { S390_FEAT_PTFF_STOUE, S390_FEAT_MULTIPLE_EPOCH }, 466 { S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL, S390_FEAT_AP }, 467 { S390_FEAT_DIAG_318, S390_FEAT_EXTENDED_LENGTH_SCCB }, 468 { S390_FEAT_NNPA, S390_FEAT_VECTOR }, 469 { S390_FEAT_RDP, S390_FEAT_LOCAL_TLB_CLEARING }, 470 }; 471 int i; 472 473 for (i = 0; i < ARRAY_SIZE(dep); i++) { 474 if (test_bit(dep[i][0], model->features) && 475 !test_bit(dep[i][1], model->features)) { 476 warn_report("\'%s\' requires \'%s\'.", 477 s390_feat_def(dep[i][0])->name, 478 s390_feat_def(dep[i][1])->name); 479 } 480 } 481 } 482 483 static void error_prepend_missing_feat(const char *name, void *opaque) 484 { 485 error_prepend((Error **) opaque, "%s ", name); 486 } 487 488 static void check_compatibility(const S390CPUModel *max_model, 489 const S390CPUModel *model, Error **errp) 490 { 491 S390FeatBitmap missing; 492 493 if (model->def->gen > max_model->def->gen) { 494 error_setg(errp, "Selected CPU generation is too new. Maximum " 495 "supported model in the configuration: \'%s\'", 496 max_model->def->name); 497 return; 498 } else if (model->def->gen == max_model->def->gen && 499 model->def->ec_ga > max_model->def->ec_ga) { 500 error_setg(errp, "Selected CPU GA level is too new. Maximum " 501 "supported model in the configuration: \'%s\'", 502 max_model->def->name); 503 return; 504 } 505 506 #ifndef CONFIG_USER_ONLY 507 if (only_migratable && test_bit(S390_FEAT_UNPACK, model->features)) { 508 error_setg(errp, "The unpack facility is not compatible with " 509 "the --only-migratable option. You must remove either " 510 "the 'unpack' facility or the --only-migratable option"); 511 return; 512 } 513 #endif 514 515 /* detect the missing features to properly report them */ 516 bitmap_andnot(missing, model->features, max_model->features, S390_FEAT_MAX); 517 if (bitmap_empty(missing, S390_FEAT_MAX)) { 518 return; 519 } 520 521 error_setg(errp, " "); 522 s390_feat_bitmap_to_ascii(missing, errp, error_prepend_missing_feat); 523 error_prepend(errp, "Some features requested in the CPU model are not " 524 "available in the configuration: "); 525 } 526 527 S390CPUModel *get_max_cpu_model(Error **errp) 528 { 529 Error *err = NULL; 530 static S390CPUModel max_model; 531 static bool cached; 532 533 if (cached) { 534 return &max_model; 535 } 536 537 if (kvm_enabled()) { 538 kvm_s390_get_host_cpu_model(&max_model, &err); 539 } else { 540 max_model.def = s390_find_cpu_def(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN, 541 QEMU_MAX_CPU_EC_GA, NULL); 542 bitmap_copy(max_model.features, qemu_max_cpu_feat, S390_FEAT_MAX); 543 } 544 if (err) { 545 error_propagate(errp, err); 546 return NULL; 547 } 548 cached = true; 549 return &max_model; 550 } 551 552 void s390_realize_cpu_model(CPUState *cs, Error **errp) 553 { 554 Error *err = NULL; 555 S390CPUClass *xcc = S390_CPU_GET_CLASS(cs); 556 S390CPU *cpu = S390_CPU(cs); 557 const S390CPUModel *max_model; 558 559 if (xcc->kvm_required && !kvm_enabled()) { 560 error_setg(errp, "CPU definition requires KVM"); 561 return; 562 } 563 564 if (!cpu->model) { 565 /* no host model support -> perform compatibility stuff */ 566 apply_cpu_model(NULL, errp); 567 return; 568 } 569 570 max_model = get_max_cpu_model(errp); 571 if (!max_model) { 572 error_prepend(errp, "CPU models are not available: "); 573 return; 574 } 575 576 /* copy over properties that can vary */ 577 cpu->model->lowest_ibc = max_model->lowest_ibc; 578 cpu->model->cpu_id = max_model->cpu_id; 579 cpu->model->cpu_id_format = max_model->cpu_id_format; 580 cpu->model->cpu_ver = max_model->cpu_ver; 581 582 check_consistency(cpu->model); 583 check_compatibility(max_model, cpu->model, &err); 584 if (err) { 585 error_propagate(errp, err); 586 return; 587 } 588 589 apply_cpu_model(cpu->model, errp); 590 591 #if !defined(CONFIG_USER_ONLY) 592 cpu->env.cpuid = s390_cpuid_from_cpu_model(cpu->model); 593 if (tcg_enabled()) { 594 /* basic mode, write the cpu address into the first 4 bit of the ID */ 595 cpu->env.cpuid = deposit64(cpu->env.cpuid, 54, 4, cpu->env.core_id); 596 } 597 #endif 598 } 599 600 static void get_feature(Object *obj, Visitor *v, const char *name, 601 void *opaque, Error **errp) 602 { 603 S390Feat feat = (S390Feat) (uintptr_t) opaque; 604 S390CPU *cpu = S390_CPU(obj); 605 bool value; 606 607 if (!cpu->model) { 608 error_setg(errp, "Details about the host CPU model are not available, " 609 "features cannot be queried."); 610 return; 611 } 612 613 value = test_bit(feat, cpu->model->features); 614 visit_type_bool(v, name, &value, errp); 615 } 616 617 static void set_feature(Object *obj, Visitor *v, const char *name, 618 void *opaque, Error **errp) 619 { 620 S390Feat feat = (S390Feat) (uintptr_t) opaque; 621 DeviceState *dev = DEVICE(obj); 622 S390CPU *cpu = S390_CPU(obj); 623 bool value; 624 625 if (dev->realized) { 626 error_setg(errp, "Attempt to set property '%s' on '%s' after " 627 "it was realized", name, object_get_typename(obj)); 628 return; 629 } else if (!cpu->model) { 630 error_setg(errp, "Details about the host CPU model are not available, " 631 "features cannot be changed."); 632 return; 633 } 634 635 if (!visit_type_bool(v, name, &value, errp)) { 636 return; 637 } 638 if (value) { 639 if (!test_bit(feat, cpu->model->def->full_feat)) { 640 error_setg(errp, "Feature '%s' is not available for CPU model '%s'," 641 " it was introduced with later models.", 642 name, cpu->model->def->name); 643 return; 644 } 645 set_bit(feat, cpu->model->features); 646 } else { 647 clear_bit(feat, cpu->model->features); 648 } 649 } 650 651 static void get_feature_group(Object *obj, Visitor *v, const char *name, 652 void *opaque, Error **errp) 653 { 654 S390FeatGroup group = (S390FeatGroup) (uintptr_t) opaque; 655 const S390FeatGroupDef *def = s390_feat_group_def(group); 656 S390CPU *cpu = S390_CPU(obj); 657 S390FeatBitmap tmp; 658 bool value; 659 660 if (!cpu->model) { 661 error_setg(errp, "Details about the host CPU model are not available, " 662 "features cannot be queried."); 663 return; 664 } 665 666 /* a group is enabled if all features are enabled */ 667 bitmap_and(tmp, cpu->model->features, def->feat, S390_FEAT_MAX); 668 value = bitmap_equal(tmp, def->feat, S390_FEAT_MAX); 669 visit_type_bool(v, name, &value, errp); 670 } 671 672 static void set_feature_group(Object *obj, Visitor *v, const char *name, 673 void *opaque, Error **errp) 674 { 675 S390FeatGroup group = (S390FeatGroup) (uintptr_t) opaque; 676 const S390FeatGroupDef *def = s390_feat_group_def(group); 677 DeviceState *dev = DEVICE(obj); 678 S390CPU *cpu = S390_CPU(obj); 679 bool value; 680 681 if (dev->realized) { 682 error_setg(errp, "Attempt to set property '%s' on '%s' after " 683 "it was realized", name, object_get_typename(obj)); 684 return; 685 } else if (!cpu->model) { 686 error_setg(errp, "Details about the host CPU model are not available, " 687 "features cannot be changed."); 688 return; 689 } 690 691 if (!visit_type_bool(v, name, &value, errp)) { 692 return; 693 } 694 if (value) { 695 /* groups are added in one shot, so an intersect is sufficient */ 696 if (!bitmap_intersects(def->feat, cpu->model->def->full_feat, 697 S390_FEAT_MAX)) { 698 error_setg(errp, "Group '%s' is not available for CPU model '%s'," 699 " it was introduced with later models.", 700 name, cpu->model->def->name); 701 return; 702 } 703 bitmap_or(cpu->model->features, cpu->model->features, def->feat, 704 S390_FEAT_MAX); 705 } else { 706 bitmap_andnot(cpu->model->features, cpu->model->features, def->feat, 707 S390_FEAT_MAX); 708 } 709 } 710 711 static void s390_cpu_model_initfn(Object *obj) 712 { 713 S390CPU *cpu = S390_CPU(obj); 714 S390CPUClass *xcc = S390_CPU_GET_CLASS(cpu); 715 716 cpu->model = g_malloc0(sizeof(*cpu->model)); 717 /* copy the model, so we can modify it */ 718 cpu->model->def = xcc->cpu_def; 719 if (xcc->is_static) { 720 /* base model - features will never change */ 721 bitmap_copy(cpu->model->features, cpu->model->def->base_feat, 722 S390_FEAT_MAX); 723 } else { 724 /* latest model - features can change */ 725 bitmap_copy(cpu->model->features, 726 cpu->model->def->default_feat, S390_FEAT_MAX); 727 } 728 } 729 730 static S390CPUModel s390_qemu_cpu_model; 731 732 /* Set the qemu CPU model (on machine initialization). Must not be called 733 * once CPUs have been created. 734 */ 735 void s390_set_qemu_cpu_model(uint16_t type, uint8_t gen, uint8_t ec_ga, 736 const S390FeatInit feat_init) 737 { 738 const S390CPUDef *def = s390_find_cpu_def(type, gen, ec_ga, NULL); 739 740 g_assert(def); 741 g_assert(QTAILQ_EMPTY_RCU(&cpus)); 742 743 /* build the CPU model */ 744 s390_qemu_cpu_model.def = def; 745 bitmap_zero(s390_qemu_cpu_model.features, S390_FEAT_MAX); 746 s390_init_feat_bitmap(feat_init, s390_qemu_cpu_model.features); 747 } 748 749 static void s390_qemu_cpu_model_initfn(Object *obj) 750 { 751 S390CPU *cpu = S390_CPU(obj); 752 753 cpu->model = g_malloc0(sizeof(*cpu->model)); 754 /* copy the CPU model so we can modify it */ 755 memcpy(cpu->model, &s390_qemu_cpu_model, sizeof(*cpu->model)); 756 } 757 758 static void s390_max_cpu_model_initfn(Object *obj) 759 { 760 const S390CPUModel *max_model; 761 S390CPU *cpu = S390_CPU(obj); 762 Error *local_err = NULL; 763 764 if (kvm_enabled() && !kvm_s390_cpu_models_supported()) { 765 /* "max" and "host" always work, even without CPU model support */ 766 return; 767 } 768 769 max_model = get_max_cpu_model(&local_err); 770 if (local_err) { 771 /* we expect errors only under KVM, when actually querying the kernel */ 772 g_assert(kvm_enabled()); 773 error_report_err(local_err); 774 /* fallback to unsupported CPU models */ 775 return; 776 } 777 778 cpu->model = g_new(S390CPUModel, 1); 779 /* copy the CPU model so we can modify it */ 780 memcpy(cpu->model, max_model, sizeof(*cpu->model)); 781 } 782 783 static void s390_cpu_model_finalize(Object *obj) 784 { 785 S390CPU *cpu = S390_CPU(obj); 786 787 g_free(cpu->model); 788 cpu->model = NULL; 789 } 790 791 static bool get_is_migration_safe(Object *obj, Error **errp) 792 { 793 return S390_CPU_GET_CLASS(obj)->is_migration_safe; 794 } 795 796 static bool get_is_static(Object *obj, Error **errp) 797 { 798 return S390_CPU_GET_CLASS(obj)->is_static; 799 } 800 801 static char *get_description(Object *obj, Error **errp) 802 { 803 return g_strdup(S390_CPU_GET_CLASS(obj)->desc); 804 } 805 806 void s390_cpu_model_class_register_props(ObjectClass *oc) 807 { 808 S390FeatGroup group; 809 S390Feat feat; 810 811 object_class_property_add_bool(oc, "migration-safe", get_is_migration_safe, 812 NULL); 813 object_class_property_add_bool(oc, "static", get_is_static, 814 NULL); 815 object_class_property_add_str(oc, "description", get_description, NULL); 816 817 for (feat = 0; feat < S390_FEAT_MAX; feat++) { 818 const S390FeatDef *def = s390_feat_def(feat); 819 object_class_property_add(oc, def->name, "bool", get_feature, 820 set_feature, NULL, (void *) feat); 821 object_class_property_set_description(oc, def->name, def->desc); 822 } 823 for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { 824 const S390FeatGroupDef *def = s390_feat_group_def(group); 825 object_class_property_add(oc, def->name, "bool", get_feature_group, 826 set_feature_group, NULL, (void *) group); 827 object_class_property_set_description(oc, def->name, def->desc); 828 } 829 } 830 831 #ifdef CONFIG_KVM 832 static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data) 833 { 834 S390CPUClass *xcc = S390_CPU_CLASS(oc); 835 836 xcc->kvm_required = true; 837 xcc->desc = "KVM only: All recognized features"; 838 } 839 #endif 840 841 static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data) 842 { 843 S390CPUClass *xcc = S390_CPU_CLASS(oc); 844 845 /* all base models are migration safe */ 846 xcc->cpu_def = (const S390CPUDef *) data; 847 xcc->is_migration_safe = true; 848 xcc->is_static = true; 849 xcc->desc = xcc->cpu_def->desc; 850 } 851 852 static void s390_cpu_model_class_init(ObjectClass *oc, void *data) 853 { 854 S390CPUClass *xcc = S390_CPU_CLASS(oc); 855 856 /* model that can change between QEMU versions */ 857 xcc->cpu_def = (const S390CPUDef *) data; 858 xcc->is_migration_safe = true; 859 xcc->desc = xcc->cpu_def->desc; 860 } 861 862 static void s390_qemu_cpu_model_class_init(ObjectClass *oc, void *data) 863 { 864 S390CPUClass *xcc = S390_CPU_CLASS(oc); 865 866 xcc->is_migration_safe = true; 867 xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s", 868 qemu_hw_version()); 869 } 870 871 static void s390_max_cpu_model_class_init(ObjectClass *oc, void *data) 872 { 873 S390CPUClass *xcc = S390_CPU_CLASS(oc); 874 875 /* 876 * The "max" model is neither static nor migration safe. Under KVM 877 * it represents the "host" model. Under TCG it represents the "qemu" CPU 878 * model of the latest QEMU machine. 879 */ 880 xcc->desc = 881 "Enables all features supported by the accelerator in the current host"; 882 } 883 884 /* Generate type name for a cpu model. Caller has to free the string. */ 885 static char *s390_cpu_type_name(const char *model_name) 886 { 887 return g_strdup_printf(S390_CPU_TYPE_NAME("%s"), model_name); 888 } 889 890 /* Generate type name for a base cpu model. Caller has to free the string. */ 891 static char *s390_base_cpu_type_name(const char *model_name) 892 { 893 return g_strdup_printf(S390_CPU_TYPE_NAME("%s-base"), model_name); 894 } 895 896 ObjectClass *s390_cpu_class_by_name(const char *name) 897 { 898 char *typename = s390_cpu_type_name(name); 899 ObjectClass *oc; 900 901 oc = object_class_by_name(typename); 902 g_free(typename); 903 return oc; 904 } 905 906 static const TypeInfo qemu_s390_cpu_type_info = { 907 .name = S390_CPU_TYPE_NAME("qemu"), 908 .parent = TYPE_S390_CPU, 909 .instance_init = s390_qemu_cpu_model_initfn, 910 .instance_finalize = s390_cpu_model_finalize, 911 .class_init = s390_qemu_cpu_model_class_init, 912 }; 913 914 static const TypeInfo max_s390_cpu_type_info = { 915 .name = S390_CPU_TYPE_NAME("max"), 916 .parent = TYPE_S390_CPU, 917 .instance_init = s390_max_cpu_model_initfn, 918 .instance_finalize = s390_cpu_model_finalize, 919 .class_init = s390_max_cpu_model_class_init, 920 }; 921 922 #ifdef CONFIG_KVM 923 static const TypeInfo host_s390_cpu_type_info = { 924 .name = S390_CPU_TYPE_NAME("host"), 925 .parent = S390_CPU_TYPE_NAME("max"), 926 .class_init = s390_host_cpu_model_class_init, 927 }; 928 #endif 929 930 static void init_ignored_base_feat(void) 931 { 932 static const int feats[] = { 933 /* MSA subfunctions that could not be available on certain machines */ 934 S390_FEAT_KMAC_DEA, 935 S390_FEAT_KMAC_TDEA_128, 936 S390_FEAT_KMAC_TDEA_192, 937 S390_FEAT_KMC_DEA, 938 S390_FEAT_KMC_TDEA_128, 939 S390_FEAT_KMC_TDEA_192, 940 S390_FEAT_KM_DEA, 941 S390_FEAT_KM_TDEA_128, 942 S390_FEAT_KM_TDEA_192, 943 S390_FEAT_KIMD_SHA_1, 944 S390_FEAT_KLMD_SHA_1, 945 /* CSSKE is deprecated on newer generations */ 946 S390_FEAT_CONDITIONAL_SSKE, 947 }; 948 int i; 949 950 for (i = 0; i < ARRAY_SIZE(feats); i++) { 951 set_bit(feats[i], ignored_base_feat); 952 } 953 } 954 955 static void register_types(void) 956 { 957 static const S390FeatInit qemu_max_init = { S390_FEAT_LIST_QEMU_MAX }; 958 int i; 959 960 init_ignored_base_feat(); 961 962 /* init all bitmaps from gnerated data initially */ 963 s390_init_feat_bitmap(qemu_max_init, qemu_max_cpu_feat); 964 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 965 s390_init_feat_bitmap(s390_cpu_defs[i].base_init, 966 s390_cpu_defs[i].base_feat); 967 s390_init_feat_bitmap(s390_cpu_defs[i].default_init, 968 s390_cpu_defs[i].default_feat); 969 s390_init_feat_bitmap(s390_cpu_defs[i].full_init, 970 s390_cpu_defs[i].full_feat); 971 } 972 973 /* initialize the qemu model with the maximum definition ("max" model) */ 974 s390_set_qemu_cpu_model(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN, 975 QEMU_MAX_CPU_EC_GA, qemu_max_init); 976 977 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 978 char *base_name = s390_base_cpu_type_name(s390_cpu_defs[i].name); 979 TypeInfo ti_base = { 980 .name = base_name, 981 .parent = TYPE_S390_CPU, 982 .instance_init = s390_cpu_model_initfn, 983 .instance_finalize = s390_cpu_model_finalize, 984 .class_init = s390_base_cpu_model_class_init, 985 .class_data = (void *) &s390_cpu_defs[i], 986 }; 987 char *name = s390_cpu_type_name(s390_cpu_defs[i].name); 988 TypeInfo ti = { 989 .name = name, 990 .parent = TYPE_S390_CPU, 991 .instance_init = s390_cpu_model_initfn, 992 .instance_finalize = s390_cpu_model_finalize, 993 .class_init = s390_cpu_model_class_init, 994 .class_data = (void *) &s390_cpu_defs[i], 995 }; 996 997 type_register_static(&ti_base); 998 type_register_static(&ti); 999 g_free(base_name); 1000 g_free(name); 1001 } 1002 1003 type_register_static(&qemu_s390_cpu_type_info); 1004 type_register_static(&max_s390_cpu_type_info); 1005 #ifdef CONFIG_KVM 1006 type_register_static(&host_s390_cpu_type_info); 1007 #endif 1008 } 1009 1010 type_init(register_types) 1011