1 /* 2 * QEMU PowerPC pSeries Logical Partition capabilities handling 3 * 4 * Copyright (c) 2017 David Gibson, Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "qemu/osdep.h" 26 #include "qemu/error-report.h" 27 #include "qapi/error.h" 28 #include "qapi/visitor.h" 29 #include "sysemu/hw_accel.h" 30 #include "exec/ram_addr.h" 31 #include "target/ppc/cpu.h" 32 #include "target/ppc/mmu-hash64.h" 33 #include "cpu-models.h" 34 #include "kvm_ppc.h" 35 #include "migration/vmstate.h" 36 #include "sysemu/qtest.h" 37 #include "sysemu/tcg.h" 38 39 #include "hw/ppc/spapr.h" 40 41 typedef struct SpaprCapPossible { 42 int num; /* size of vals array below */ 43 const char *help; /* help text for vals */ 44 /* 45 * Note: 46 * - because of the way compatibility is determined vals MUST be ordered 47 * such that later options are a superset of all preceding options. 48 * - the order of vals must be preserved, that is their index is important, 49 * however vals may be added to the end of the list so long as the above 50 * point is observed 51 */ 52 const char *vals[]; 53 } SpaprCapPossible; 54 55 typedef struct SpaprCapabilityInfo { 56 const char *name; 57 const char *description; 58 int index; 59 60 /* Getter and Setter Function Pointers */ 61 ObjectPropertyAccessor *get; 62 ObjectPropertyAccessor *set; 63 const char *type; 64 /* Possible values if this is a custom string type */ 65 SpaprCapPossible *possible; 66 /* Make sure the virtual hardware can support this capability */ 67 void (*apply)(SpaprMachineState *spapr, uint8_t val, Error **errp); 68 void (*cpu_apply)(SpaprMachineState *spapr, PowerPCCPU *cpu, 69 uint8_t val, Error **errp); 70 bool (*migrate_needed)(void *opaque); 71 } SpaprCapabilityInfo; 72 73 static void spapr_cap_get_bool(Object *obj, Visitor *v, const char *name, 74 void *opaque, Error **errp) 75 { 76 SpaprCapabilityInfo *cap = opaque; 77 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 78 bool value = spapr_get_cap(spapr, cap->index) == SPAPR_CAP_ON; 79 80 visit_type_bool(v, name, &value, errp); 81 } 82 83 static void spapr_cap_set_bool(Object *obj, Visitor *v, const char *name, 84 void *opaque, Error **errp) 85 { 86 SpaprCapabilityInfo *cap = opaque; 87 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 88 bool value; 89 Error *local_err = NULL; 90 91 visit_type_bool(v, name, &value, &local_err); 92 if (local_err) { 93 error_propagate(errp, local_err); 94 return; 95 } 96 97 spapr->cmd_line_caps[cap->index] = true; 98 spapr->eff.caps[cap->index] = value ? SPAPR_CAP_ON : SPAPR_CAP_OFF; 99 } 100 101 102 static void spapr_cap_get_string(Object *obj, Visitor *v, const char *name, 103 void *opaque, Error **errp) 104 { 105 SpaprCapabilityInfo *cap = opaque; 106 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 107 char *val = NULL; 108 uint8_t value = spapr_get_cap(spapr, cap->index); 109 110 if (value >= cap->possible->num) { 111 error_setg(errp, "Invalid value (%d) for cap-%s", value, cap->name); 112 return; 113 } 114 115 val = g_strdup(cap->possible->vals[value]); 116 117 visit_type_str(v, name, &val, errp); 118 g_free(val); 119 } 120 121 static void spapr_cap_set_string(Object *obj, Visitor *v, const char *name, 122 void *opaque, Error **errp) 123 { 124 SpaprCapabilityInfo *cap = opaque; 125 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 126 Error *local_err = NULL; 127 uint8_t i; 128 char *val; 129 130 visit_type_str(v, name, &val, &local_err); 131 if (local_err) { 132 error_propagate(errp, local_err); 133 return; 134 } 135 136 if (!strcmp(val, "?")) { 137 error_setg(errp, "%s", cap->possible->help); 138 goto out; 139 } 140 for (i = 0; i < cap->possible->num; i++) { 141 if (!strcasecmp(val, cap->possible->vals[i])) { 142 spapr->cmd_line_caps[cap->index] = true; 143 spapr->eff.caps[cap->index] = i; 144 goto out; 145 } 146 } 147 148 error_setg(errp, "Invalid capability mode \"%s\" for cap-%s", val, 149 cap->name); 150 out: 151 g_free(val); 152 } 153 154 static void spapr_cap_get_pagesize(Object *obj, Visitor *v, const char *name, 155 void *opaque, Error **errp) 156 { 157 SpaprCapabilityInfo *cap = opaque; 158 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 159 uint8_t val = spapr_get_cap(spapr, cap->index); 160 uint64_t pagesize = (1ULL << val); 161 162 visit_type_size(v, name, &pagesize, errp); 163 } 164 165 static void spapr_cap_set_pagesize(Object *obj, Visitor *v, const char *name, 166 void *opaque, Error **errp) 167 { 168 SpaprCapabilityInfo *cap = opaque; 169 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 170 uint64_t pagesize; 171 uint8_t val; 172 Error *local_err = NULL; 173 174 visit_type_size(v, name, &pagesize, &local_err); 175 if (local_err) { 176 error_propagate(errp, local_err); 177 return; 178 } 179 180 if (!is_power_of_2(pagesize)) { 181 error_setg(errp, "cap-%s must be a power of 2", cap->name); 182 return; 183 } 184 185 val = ctz64(pagesize); 186 spapr->cmd_line_caps[cap->index] = true; 187 spapr->eff.caps[cap->index] = val; 188 } 189 190 static void cap_htm_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) 191 { 192 if (!val) { 193 /* TODO: We don't support disabling htm yet */ 194 return; 195 } 196 if (tcg_enabled()) { 197 error_setg(errp, 198 "No Transactional Memory support in TCG," 199 " try appending -machine cap-htm=off"); 200 } else if (kvm_enabled() && !kvmppc_has_cap_htm()) { 201 error_setg(errp, 202 "KVM implementation does not support Transactional Memory," 203 " try appending -machine cap-htm=off" 204 ); 205 } 206 } 207 208 static void cap_vsx_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) 209 { 210 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 211 CPUPPCState *env = &cpu->env; 212 213 if (!val) { 214 /* TODO: We don't support disabling vsx yet */ 215 return; 216 } 217 /* Allowable CPUs in spapr_cpu_core.c should already have gotten 218 * rid of anything that doesn't do VMX */ 219 g_assert(env->insns_flags & PPC_ALTIVEC); 220 if (!(env->insns_flags2 & PPC2_VSX)) { 221 error_setg(errp, "VSX support not available," 222 " try appending -machine cap-vsx=off"); 223 } 224 } 225 226 static void cap_dfp_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) 227 { 228 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 229 CPUPPCState *env = &cpu->env; 230 231 if (!val) { 232 /* TODO: We don't support disabling dfp yet */ 233 return; 234 } 235 if (!(env->insns_flags2 & PPC2_DFP)) { 236 error_setg(errp, "DFP support not available," 237 " try appending -machine cap-dfp=off"); 238 } 239 } 240 241 SpaprCapPossible cap_cfpc_possible = { 242 .num = 3, 243 .vals = {"broken", "workaround", "fixed"}, 244 .help = "broken - no protection, workaround - workaround available," 245 " fixed - fixed in hardware", 246 }; 247 248 static void cap_safe_cache_apply(SpaprMachineState *spapr, uint8_t val, 249 Error **errp) 250 { 251 Error *local_err = NULL; 252 uint8_t kvm_val = kvmppc_get_cap_safe_cache(); 253 254 if (tcg_enabled() && val) { 255 /* TCG only supports broken, allow other values and print a warning */ 256 error_setg(&local_err, 257 "TCG doesn't support requested feature, cap-cfpc=%s", 258 cap_cfpc_possible.vals[val]); 259 } else if (kvm_enabled() && (val > kvm_val)) { 260 error_setg(errp, 261 "Requested safe cache capability level not supported by kvm," 262 " try appending -machine cap-cfpc=%s", 263 cap_cfpc_possible.vals[kvm_val]); 264 } 265 266 if (local_err != NULL) 267 warn_report_err(local_err); 268 } 269 270 SpaprCapPossible cap_sbbc_possible = { 271 .num = 3, 272 .vals = {"broken", "workaround", "fixed"}, 273 .help = "broken - no protection, workaround - workaround available," 274 " fixed - fixed in hardware", 275 }; 276 277 static void cap_safe_bounds_check_apply(SpaprMachineState *spapr, uint8_t val, 278 Error **errp) 279 { 280 Error *local_err = NULL; 281 uint8_t kvm_val = kvmppc_get_cap_safe_bounds_check(); 282 283 if (tcg_enabled() && val) { 284 /* TCG only supports broken, allow other values and print a warning */ 285 error_setg(&local_err, 286 "TCG doesn't support requested feature, cap-sbbc=%s", 287 cap_sbbc_possible.vals[val]); 288 } else if (kvm_enabled() && (val > kvm_val)) { 289 error_setg(errp, 290 "Requested safe bounds check capability level not supported by kvm," 291 " try appending -machine cap-sbbc=%s", 292 cap_sbbc_possible.vals[kvm_val]); 293 } 294 295 if (local_err != NULL) 296 warn_report_err(local_err); 297 } 298 299 SpaprCapPossible cap_ibs_possible = { 300 .num = 5, 301 /* Note workaround only maintained for compatibility */ 302 .vals = {"broken", "workaround", "fixed-ibs", "fixed-ccd", "fixed-na"}, 303 .help = "broken - no protection, workaround - count cache flush" 304 ", fixed-ibs - indirect branch serialisation," 305 " fixed-ccd - cache count disabled," 306 " fixed-na - fixed in hardware (no longer applicable)", 307 }; 308 309 static void cap_safe_indirect_branch_apply(SpaprMachineState *spapr, 310 uint8_t val, Error **errp) 311 { 312 Error *local_err = NULL; 313 uint8_t kvm_val = kvmppc_get_cap_safe_indirect_branch(); 314 315 if (tcg_enabled() && val) { 316 /* TCG only supports broken, allow other values and print a warning */ 317 error_setg(&local_err, 318 "TCG doesn't support requested feature, cap-ibs=%s", 319 cap_ibs_possible.vals[val]); 320 } else if (kvm_enabled() && (val > kvm_val)) { 321 error_setg(errp, 322 "Requested safe indirect branch capability level not supported by kvm," 323 " try appending -machine cap-ibs=%s", 324 cap_ibs_possible.vals[kvm_val]); 325 } 326 327 if (local_err != NULL) { 328 warn_report_err(local_err); 329 } 330 } 331 332 #define VALUE_DESC_TRISTATE " (broken, workaround, fixed)" 333 334 void spapr_check_pagesize(SpaprMachineState *spapr, hwaddr pagesize, 335 Error **errp) 336 { 337 hwaddr maxpagesize = (1ULL << spapr->eff.caps[SPAPR_CAP_HPT_MAXPAGESIZE]); 338 339 if (!kvmppc_hpt_needs_host_contiguous_pages()) { 340 return; 341 } 342 343 if (maxpagesize > pagesize) { 344 error_setg(errp, 345 "Can't support %"HWADDR_PRIu" kiB guest pages with %" 346 HWADDR_PRIu" kiB host pages with this KVM implementation", 347 maxpagesize >> 10, pagesize >> 10); 348 } 349 } 350 351 static void cap_hpt_maxpagesize_apply(SpaprMachineState *spapr, 352 uint8_t val, Error **errp) 353 { 354 if (val < 12) { 355 error_setg(errp, "Require at least 4kiB hpt-max-page-size"); 356 return; 357 } else if (val < 16) { 358 warn_report("Many guests require at least 64kiB hpt-max-page-size"); 359 } 360 361 spapr_check_pagesize(spapr, qemu_minrampagesize(), errp); 362 } 363 364 static bool cap_hpt_maxpagesize_migrate_needed(void *opaque) 365 { 366 return !SPAPR_MACHINE_GET_CLASS(opaque)->pre_4_1_migration; 367 } 368 369 static bool spapr_pagesize_cb(void *opaque, uint32_t seg_pshift, 370 uint32_t pshift) 371 { 372 unsigned maxshift = *((unsigned *)opaque); 373 374 assert(pshift >= seg_pshift); 375 376 /* Don't allow the guest to use pages bigger than the configured 377 * maximum size */ 378 if (pshift > maxshift) { 379 return false; 380 } 381 382 /* For whatever reason, KVM doesn't allow multiple pagesizes 383 * within a segment, *except* for the case of 16M pages in a 4k or 384 * 64k segment. Always exclude other cases, so that TCG and KVM 385 * guests see a consistent environment */ 386 if ((pshift != seg_pshift) && (pshift != 24)) { 387 return false; 388 } 389 390 return true; 391 } 392 393 static void cap_hpt_maxpagesize_cpu_apply(SpaprMachineState *spapr, 394 PowerPCCPU *cpu, 395 uint8_t val, Error **errp) 396 { 397 unsigned maxshift = val; 398 399 ppc_hash64_filter_pagesizes(cpu, spapr_pagesize_cb, &maxshift); 400 } 401 402 static void cap_nested_kvm_hv_apply(SpaprMachineState *spapr, 403 uint8_t val, Error **errp) 404 { 405 if (!val) { 406 /* capability disabled by default */ 407 return; 408 } 409 410 if (tcg_enabled()) { 411 error_setg(errp, 412 "No Nested KVM-HV support in tcg," 413 " try appending -machine cap-nested-hv=off"); 414 } else if (kvm_enabled()) { 415 if (!kvmppc_has_cap_nested_kvm_hv()) { 416 error_setg(errp, 417 "KVM implementation does not support Nested KVM-HV," 418 " try appending -machine cap-nested-hv=off"); 419 } else if (kvmppc_set_cap_nested_kvm_hv(val) < 0) { 420 error_setg(errp, 421 "Error enabling cap-nested-hv with KVM, try cap-nested-hv=off"); 422 } 423 } 424 } 425 426 static void cap_large_decr_apply(SpaprMachineState *spapr, 427 uint8_t val, Error **errp) 428 { 429 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 430 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 431 432 if (!val) { 433 return; /* Disabled by default */ 434 } 435 436 if (tcg_enabled()) { 437 if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_3_00, 0, 438 spapr->max_compat_pvr)) { 439 error_setg(errp, 440 "Large decrementer only supported on POWER9, try -cpu POWER9"); 441 return; 442 } 443 } else if (kvm_enabled()) { 444 int kvm_nr_bits = kvmppc_get_cap_large_decr(); 445 446 if (!kvm_nr_bits) { 447 error_setg(errp, 448 "No large decrementer support," 449 " try appending -machine cap-large-decr=off"); 450 } else if (pcc->lrg_decr_bits != kvm_nr_bits) { 451 error_setg(errp, 452 "KVM large decrementer size (%d) differs to model (%d)," 453 " try appending -machine cap-large-decr=off", 454 kvm_nr_bits, pcc->lrg_decr_bits); 455 } 456 } 457 } 458 459 static void cap_large_decr_cpu_apply(SpaprMachineState *spapr, 460 PowerPCCPU *cpu, 461 uint8_t val, Error **errp) 462 { 463 CPUPPCState *env = &cpu->env; 464 target_ulong lpcr = env->spr[SPR_LPCR]; 465 466 if (kvm_enabled()) { 467 if (kvmppc_enable_cap_large_decr(cpu, val)) { 468 error_setg(errp, 469 "No large decrementer support," 470 " try appending -machine cap-large-decr=off"); 471 } 472 } 473 474 if (val) { 475 lpcr |= LPCR_LD; 476 } else { 477 lpcr &= ~LPCR_LD; 478 } 479 ppc_store_lpcr(cpu, lpcr); 480 } 481 482 static void cap_ccf_assist_apply(SpaprMachineState *spapr, uint8_t val, 483 Error **errp) 484 { 485 uint8_t kvm_val = kvmppc_get_cap_count_cache_flush_assist(); 486 487 if (tcg_enabled() && val) { 488 /* TODO - for now only allow broken for TCG */ 489 error_setg(errp, 490 "Requested count cache flush assist capability level not supported by tcg," 491 " try appending -machine cap-ccf-assist=off"); 492 } else if (kvm_enabled() && (val > kvm_val)) { 493 error_setg(errp, 494 "Requested count cache flush assist capability level not supported by kvm," 495 " try appending -machine cap-ccf-assist=off"); 496 } 497 } 498 499 SpaprCapabilityInfo capability_table[SPAPR_CAP_NUM] = { 500 [SPAPR_CAP_HTM] = { 501 .name = "htm", 502 .description = "Allow Hardware Transactional Memory (HTM)", 503 .index = SPAPR_CAP_HTM, 504 .get = spapr_cap_get_bool, 505 .set = spapr_cap_set_bool, 506 .type = "bool", 507 .apply = cap_htm_apply, 508 }, 509 [SPAPR_CAP_VSX] = { 510 .name = "vsx", 511 .description = "Allow Vector Scalar Extensions (VSX)", 512 .index = SPAPR_CAP_VSX, 513 .get = spapr_cap_get_bool, 514 .set = spapr_cap_set_bool, 515 .type = "bool", 516 .apply = cap_vsx_apply, 517 }, 518 [SPAPR_CAP_DFP] = { 519 .name = "dfp", 520 .description = "Allow Decimal Floating Point (DFP)", 521 .index = SPAPR_CAP_DFP, 522 .get = spapr_cap_get_bool, 523 .set = spapr_cap_set_bool, 524 .type = "bool", 525 .apply = cap_dfp_apply, 526 }, 527 [SPAPR_CAP_CFPC] = { 528 .name = "cfpc", 529 .description = "Cache Flush on Privilege Change" VALUE_DESC_TRISTATE, 530 .index = SPAPR_CAP_CFPC, 531 .get = spapr_cap_get_string, 532 .set = spapr_cap_set_string, 533 .type = "string", 534 .possible = &cap_cfpc_possible, 535 .apply = cap_safe_cache_apply, 536 }, 537 [SPAPR_CAP_SBBC] = { 538 .name = "sbbc", 539 .description = "Speculation Barrier Bounds Checking" VALUE_DESC_TRISTATE, 540 .index = SPAPR_CAP_SBBC, 541 .get = spapr_cap_get_string, 542 .set = spapr_cap_set_string, 543 .type = "string", 544 .possible = &cap_sbbc_possible, 545 .apply = cap_safe_bounds_check_apply, 546 }, 547 [SPAPR_CAP_IBS] = { 548 .name = "ibs", 549 .description = 550 "Indirect Branch Speculation (broken, workaround, fixed-ibs," 551 "fixed-ccd, fixed-na)", 552 .index = SPAPR_CAP_IBS, 553 .get = spapr_cap_get_string, 554 .set = spapr_cap_set_string, 555 .type = "string", 556 .possible = &cap_ibs_possible, 557 .apply = cap_safe_indirect_branch_apply, 558 }, 559 [SPAPR_CAP_HPT_MAXPAGESIZE] = { 560 .name = "hpt-max-page-size", 561 .description = "Maximum page size for Hash Page Table guests", 562 .index = SPAPR_CAP_HPT_MAXPAGESIZE, 563 .get = spapr_cap_get_pagesize, 564 .set = spapr_cap_set_pagesize, 565 .type = "int", 566 .apply = cap_hpt_maxpagesize_apply, 567 .cpu_apply = cap_hpt_maxpagesize_cpu_apply, 568 .migrate_needed = cap_hpt_maxpagesize_migrate_needed, 569 }, 570 [SPAPR_CAP_NESTED_KVM_HV] = { 571 .name = "nested-hv", 572 .description = "Allow Nested KVM-HV", 573 .index = SPAPR_CAP_NESTED_KVM_HV, 574 .get = spapr_cap_get_bool, 575 .set = spapr_cap_set_bool, 576 .type = "bool", 577 .apply = cap_nested_kvm_hv_apply, 578 }, 579 [SPAPR_CAP_LARGE_DECREMENTER] = { 580 .name = "large-decr", 581 .description = "Allow Large Decrementer", 582 .index = SPAPR_CAP_LARGE_DECREMENTER, 583 .get = spapr_cap_get_bool, 584 .set = spapr_cap_set_bool, 585 .type = "bool", 586 .apply = cap_large_decr_apply, 587 .cpu_apply = cap_large_decr_cpu_apply, 588 }, 589 [SPAPR_CAP_CCF_ASSIST] = { 590 .name = "ccf-assist", 591 .description = "Count Cache Flush Assist via HW Instruction", 592 .index = SPAPR_CAP_CCF_ASSIST, 593 .get = spapr_cap_get_bool, 594 .set = spapr_cap_set_bool, 595 .type = "bool", 596 .apply = cap_ccf_assist_apply, 597 }, 598 }; 599 600 static SpaprCapabilities default_caps_with_cpu(SpaprMachineState *spapr, 601 const char *cputype) 602 { 603 SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr); 604 SpaprCapabilities caps; 605 606 caps = smc->default_caps; 607 608 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_3_00, 609 0, spapr->max_compat_pvr)) { 610 caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = SPAPR_CAP_OFF; 611 } 612 613 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_07, 614 0, spapr->max_compat_pvr)) { 615 caps.caps[SPAPR_CAP_HTM] = SPAPR_CAP_OFF; 616 caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_BROKEN; 617 } 618 619 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06_PLUS, 620 0, spapr->max_compat_pvr)) { 621 caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN; 622 } 623 624 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06, 625 0, spapr->max_compat_pvr)) { 626 caps.caps[SPAPR_CAP_VSX] = SPAPR_CAP_OFF; 627 caps.caps[SPAPR_CAP_DFP] = SPAPR_CAP_OFF; 628 caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN; 629 } 630 631 /* This is for pseries-2.12 and older */ 632 if (smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] == 0) { 633 uint8_t mps; 634 635 if (kvmppc_hpt_needs_host_contiguous_pages()) { 636 mps = ctz64(qemu_minrampagesize()); 637 } else { 638 mps = 34; /* allow everything up to 16GiB, i.e. everything */ 639 } 640 641 caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = mps; 642 } 643 644 return caps; 645 } 646 647 int spapr_caps_pre_load(void *opaque) 648 { 649 SpaprMachineState *spapr = opaque; 650 651 /* Set to default so we can tell if this came in with the migration */ 652 spapr->mig = spapr->def; 653 return 0; 654 } 655 656 int spapr_caps_pre_save(void *opaque) 657 { 658 SpaprMachineState *spapr = opaque; 659 660 spapr->mig = spapr->eff; 661 return 0; 662 } 663 664 /* This has to be called from the top-level spapr post_load, not the 665 * caps specific one. Otherwise it wouldn't be called when the source 666 * caps are all defaults, which could still conflict with overridden 667 * caps on the destination */ 668 int spapr_caps_post_migration(SpaprMachineState *spapr) 669 { 670 int i; 671 bool ok = true; 672 SpaprCapabilities dstcaps = spapr->eff; 673 SpaprCapabilities srccaps; 674 675 srccaps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); 676 for (i = 0; i < SPAPR_CAP_NUM; i++) { 677 /* If not default value then assume came in with the migration */ 678 if (spapr->mig.caps[i] != spapr->def.caps[i]) { 679 srccaps.caps[i] = spapr->mig.caps[i]; 680 } 681 } 682 683 for (i = 0; i < SPAPR_CAP_NUM; i++) { 684 SpaprCapabilityInfo *info = &capability_table[i]; 685 686 if (srccaps.caps[i] > dstcaps.caps[i]) { 687 error_report("cap-%s higher level (%d) in incoming stream than on destination (%d)", 688 info->name, srccaps.caps[i], dstcaps.caps[i]); 689 ok = false; 690 } 691 692 if (srccaps.caps[i] < dstcaps.caps[i]) { 693 warn_report("cap-%s lower level (%d) in incoming stream than on destination (%d)", 694 info->name, srccaps.caps[i], dstcaps.caps[i]); 695 } 696 } 697 698 return ok ? 0 : -EINVAL; 699 } 700 701 /* Used to generate the migration field and needed function for a spapr cap */ 702 #define SPAPR_CAP_MIG_STATE(sname, cap) \ 703 static bool spapr_cap_##sname##_needed(void *opaque) \ 704 { \ 705 SpaprMachineState *spapr = opaque; \ 706 bool (*needed)(void *opaque) = \ 707 capability_table[cap].migrate_needed; \ 708 \ 709 return needed ? needed(opaque) : true && \ 710 spapr->cmd_line_caps[cap] && \ 711 (spapr->eff.caps[cap] != \ 712 spapr->def.caps[cap]); \ 713 } \ 714 \ 715 const VMStateDescription vmstate_spapr_cap_##sname = { \ 716 .name = "spapr/cap/" #sname, \ 717 .version_id = 1, \ 718 .minimum_version_id = 1, \ 719 .needed = spapr_cap_##sname##_needed, \ 720 .fields = (VMStateField[]) { \ 721 VMSTATE_UINT8(mig.caps[cap], \ 722 SpaprMachineState), \ 723 VMSTATE_END_OF_LIST() \ 724 }, \ 725 } 726 727 SPAPR_CAP_MIG_STATE(htm, SPAPR_CAP_HTM); 728 SPAPR_CAP_MIG_STATE(vsx, SPAPR_CAP_VSX); 729 SPAPR_CAP_MIG_STATE(dfp, SPAPR_CAP_DFP); 730 SPAPR_CAP_MIG_STATE(cfpc, SPAPR_CAP_CFPC); 731 SPAPR_CAP_MIG_STATE(sbbc, SPAPR_CAP_SBBC); 732 SPAPR_CAP_MIG_STATE(ibs, SPAPR_CAP_IBS); 733 SPAPR_CAP_MIG_STATE(hpt_maxpagesize, SPAPR_CAP_HPT_MAXPAGESIZE); 734 SPAPR_CAP_MIG_STATE(nested_kvm_hv, SPAPR_CAP_NESTED_KVM_HV); 735 SPAPR_CAP_MIG_STATE(large_decr, SPAPR_CAP_LARGE_DECREMENTER); 736 SPAPR_CAP_MIG_STATE(ccf_assist, SPAPR_CAP_CCF_ASSIST); 737 738 void spapr_caps_init(SpaprMachineState *spapr) 739 { 740 SpaprCapabilities default_caps; 741 int i; 742 743 /* Compute the actual set of caps we should run with */ 744 default_caps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); 745 746 for (i = 0; i < SPAPR_CAP_NUM; i++) { 747 /* Store the defaults */ 748 spapr->def.caps[i] = default_caps.caps[i]; 749 /* If not set on the command line then apply the default value */ 750 if (!spapr->cmd_line_caps[i]) { 751 spapr->eff.caps[i] = default_caps.caps[i]; 752 } 753 } 754 } 755 756 void spapr_caps_apply(SpaprMachineState *spapr) 757 { 758 int i; 759 760 for (i = 0; i < SPAPR_CAP_NUM; i++) { 761 SpaprCapabilityInfo *info = &capability_table[i]; 762 763 /* 764 * If the apply function can't set the desired level and thinks it's 765 * fatal, it should cause that. 766 */ 767 info->apply(spapr, spapr->eff.caps[i], &error_fatal); 768 } 769 } 770 771 void spapr_caps_cpu_apply(SpaprMachineState *spapr, PowerPCCPU *cpu) 772 { 773 int i; 774 775 for (i = 0; i < SPAPR_CAP_NUM; i++) { 776 SpaprCapabilityInfo *info = &capability_table[i]; 777 778 /* 779 * If the apply function can't set the desired level and thinks it's 780 * fatal, it should cause that. 781 */ 782 if (info->cpu_apply) { 783 info->cpu_apply(spapr, cpu, spapr->eff.caps[i], &error_fatal); 784 } 785 } 786 } 787 788 void spapr_caps_add_properties(SpaprMachineClass *smc, Error **errp) 789 { 790 Error *local_err = NULL; 791 ObjectClass *klass = OBJECT_CLASS(smc); 792 int i; 793 794 for (i = 0; i < ARRAY_SIZE(capability_table); i++) { 795 SpaprCapabilityInfo *cap = &capability_table[i]; 796 char *name = g_strdup_printf("cap-%s", cap->name); 797 char *desc; 798 799 object_class_property_add(klass, name, cap->type, 800 cap->get, cap->set, 801 NULL, cap, &local_err); 802 if (local_err) { 803 error_propagate(errp, local_err); 804 g_free(name); 805 return; 806 } 807 808 desc = g_strdup_printf("%s", cap->description); 809 object_class_property_set_description(klass, name, desc, &local_err); 810 g_free(name); 811 g_free(desc); 812 if (local_err) { 813 error_propagate(errp, local_err); 814 return; 815 } 816 } 817 } 818