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/tcg.h" 37 38 #include "hw/ppc/spapr.h" 39 40 typedef struct SpaprCapPossible { 41 int num; /* size of vals array below */ 42 const char *help; /* help text for vals */ 43 /* 44 * Note: 45 * - because of the way compatibility is determined vals MUST be ordered 46 * such that later options are a superset of all preceding options. 47 * - the order of vals must be preserved, that is their index is important, 48 * however vals may be added to the end of the list so long as the above 49 * point is observed 50 */ 51 const char *vals[]; 52 } SpaprCapPossible; 53 54 typedef struct SpaprCapabilityInfo { 55 const char *name; 56 const char *description; 57 int index; 58 59 /* Getter and Setter Function Pointers */ 60 ObjectPropertyAccessor *get; 61 ObjectPropertyAccessor *set; 62 const char *type; 63 /* Possible values if this is a custom string type */ 64 SpaprCapPossible *possible; 65 /* Make sure the virtual hardware can support this capability */ 66 void (*apply)(SpaprMachineState *spapr, uint8_t val, Error **errp); 67 void (*cpu_apply)(SpaprMachineState *spapr, PowerPCCPU *cpu, 68 uint8_t val, Error **errp); 69 bool (*migrate_needed)(void *opaque); 70 } SpaprCapabilityInfo; 71 72 static void spapr_cap_get_bool(Object *obj, Visitor *v, const char *name, 73 void *opaque, Error **errp) 74 { 75 SpaprCapabilityInfo *cap = opaque; 76 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 77 bool value = spapr_get_cap(spapr, cap->index) == SPAPR_CAP_ON; 78 79 visit_type_bool(v, name, &value, errp); 80 } 81 82 static void spapr_cap_set_bool(Object *obj, Visitor *v, const char *name, 83 void *opaque, Error **errp) 84 { 85 SpaprCapabilityInfo *cap = opaque; 86 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 87 bool value; 88 89 if (!visit_type_bool(v, name, &value, errp)) { 90 return; 91 } 92 93 spapr->cmd_line_caps[cap->index] = true; 94 spapr->eff.caps[cap->index] = value ? SPAPR_CAP_ON : SPAPR_CAP_OFF; 95 } 96 97 98 static void spapr_cap_get_string(Object *obj, Visitor *v, const char *name, 99 void *opaque, Error **errp) 100 { 101 SpaprCapabilityInfo *cap = opaque; 102 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 103 g_autofree char *val = NULL; 104 uint8_t value = spapr_get_cap(spapr, cap->index); 105 106 if (value >= cap->possible->num) { 107 error_setg(errp, "Invalid value (%d) for cap-%s", value, cap->name); 108 return; 109 } 110 111 val = g_strdup(cap->possible->vals[value]); 112 113 visit_type_str(v, name, &val, errp); 114 } 115 116 static void spapr_cap_set_string(Object *obj, Visitor *v, const char *name, 117 void *opaque, Error **errp) 118 { 119 SpaprCapabilityInfo *cap = opaque; 120 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 121 uint8_t i; 122 g_autofree char *val = NULL; 123 124 if (!visit_type_str(v, name, &val, errp)) { 125 return; 126 } 127 128 if (!strcmp(val, "?")) { 129 error_setg(errp, "%s", cap->possible->help); 130 return; 131 } 132 for (i = 0; i < cap->possible->num; i++) { 133 if (!strcasecmp(val, cap->possible->vals[i])) { 134 spapr->cmd_line_caps[cap->index] = true; 135 spapr->eff.caps[cap->index] = i; 136 return; 137 } 138 } 139 140 error_setg(errp, "Invalid capability mode \"%s\" for cap-%s", val, 141 cap->name); 142 } 143 144 static void spapr_cap_get_pagesize(Object *obj, Visitor *v, const char *name, 145 void *opaque, Error **errp) 146 { 147 SpaprCapabilityInfo *cap = opaque; 148 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 149 uint8_t val = spapr_get_cap(spapr, cap->index); 150 uint64_t pagesize = (1ULL << val); 151 152 visit_type_size(v, name, &pagesize, errp); 153 } 154 155 static void spapr_cap_set_pagesize(Object *obj, Visitor *v, const char *name, 156 void *opaque, Error **errp) 157 { 158 SpaprCapabilityInfo *cap = opaque; 159 SpaprMachineState *spapr = SPAPR_MACHINE(obj); 160 uint64_t pagesize; 161 uint8_t val; 162 163 if (!visit_type_size(v, name, &pagesize, errp)) { 164 return; 165 } 166 167 if (!is_power_of_2(pagesize)) { 168 error_setg(errp, "cap-%s must be a power of 2", cap->name); 169 return; 170 } 171 172 val = ctz64(pagesize); 173 spapr->cmd_line_caps[cap->index] = true; 174 spapr->eff.caps[cap->index] = val; 175 } 176 177 static void cap_htm_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) 178 { 179 ERRP_GUARD(); 180 if (!val) { 181 /* TODO: We don't support disabling htm yet */ 182 return; 183 } 184 if (tcg_enabled()) { 185 error_setg(errp, "No Transactional Memory support in TCG"); 186 error_append_hint(errp, "Try appending -machine cap-htm=off\n"); 187 } else if (kvm_enabled() && !kvmppc_has_cap_htm()) { 188 error_setg(errp, 189 "KVM implementation does not support Transactional Memory"); 190 error_append_hint(errp, "Try appending -machine cap-htm=off\n"); 191 } 192 } 193 194 static void cap_vsx_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) 195 { 196 ERRP_GUARD(); 197 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 198 CPUPPCState *env = &cpu->env; 199 200 if (!val) { 201 /* TODO: We don't support disabling vsx yet */ 202 return; 203 } 204 /* Allowable CPUs in spapr_cpu_core.c should already have gotten 205 * rid of anything that doesn't do VMX */ 206 g_assert(env->insns_flags & PPC_ALTIVEC); 207 if (!(env->insns_flags2 & PPC2_VSX)) { 208 error_setg(errp, "VSX support not available"); 209 error_append_hint(errp, "Try appending -machine cap-vsx=off\n"); 210 } 211 } 212 213 static void cap_dfp_apply(SpaprMachineState *spapr, uint8_t val, Error **errp) 214 { 215 ERRP_GUARD(); 216 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 217 CPUPPCState *env = &cpu->env; 218 219 if (!val) { 220 /* TODO: We don't support disabling dfp yet */ 221 return; 222 } 223 if (!(env->insns_flags2 & PPC2_DFP)) { 224 error_setg(errp, "DFP support not available"); 225 error_append_hint(errp, "Try appending -machine cap-dfp=off\n"); 226 } 227 } 228 229 SpaprCapPossible cap_cfpc_possible = { 230 .num = 3, 231 .vals = {"broken", "workaround", "fixed"}, 232 .help = "broken - no protection, workaround - workaround available," 233 " fixed - fixed in hardware", 234 }; 235 236 static void cap_safe_cache_apply(SpaprMachineState *spapr, uint8_t val, 237 Error **errp) 238 { 239 ERRP_GUARD(); 240 uint8_t kvm_val = kvmppc_get_cap_safe_cache(); 241 242 if (tcg_enabled() && val) { 243 /* TCG only supports broken, allow other values and print a warning */ 244 warn_report("TCG doesn't support requested feature, cap-cfpc=%s", 245 cap_cfpc_possible.vals[val]); 246 } else if (kvm_enabled() && (val > kvm_val)) { 247 error_setg(errp, 248 "Requested safe cache capability level not supported by KVM"); 249 error_append_hint(errp, "Try appending -machine cap-cfpc=%s\n", 250 cap_cfpc_possible.vals[kvm_val]); 251 } 252 } 253 254 SpaprCapPossible cap_sbbc_possible = { 255 .num = 3, 256 .vals = {"broken", "workaround", "fixed"}, 257 .help = "broken - no protection, workaround - workaround available," 258 " fixed - fixed in hardware", 259 }; 260 261 static void cap_safe_bounds_check_apply(SpaprMachineState *spapr, uint8_t val, 262 Error **errp) 263 { 264 ERRP_GUARD(); 265 uint8_t kvm_val = kvmppc_get_cap_safe_bounds_check(); 266 267 if (tcg_enabled() && val) { 268 /* TCG only supports broken, allow other values and print a warning */ 269 warn_report("TCG doesn't support requested feature, cap-sbbc=%s", 270 cap_sbbc_possible.vals[val]); 271 } else if (kvm_enabled() && (val > kvm_val)) { 272 error_setg(errp, 273 "Requested safe bounds check capability level not supported by KVM"); 274 error_append_hint(errp, "Try appending -machine cap-sbbc=%s\n", 275 cap_sbbc_possible.vals[kvm_val]); 276 } 277 } 278 279 SpaprCapPossible cap_ibs_possible = { 280 .num = 5, 281 /* Note workaround only maintained for compatibility */ 282 .vals = {"broken", "workaround", "fixed-ibs", "fixed-ccd", "fixed-na"}, 283 .help = "broken - no protection, workaround - count cache flush" 284 ", fixed-ibs - indirect branch serialisation," 285 " fixed-ccd - cache count disabled," 286 " fixed-na - fixed in hardware (no longer applicable)", 287 }; 288 289 static void cap_safe_indirect_branch_apply(SpaprMachineState *spapr, 290 uint8_t val, Error **errp) 291 { 292 ERRP_GUARD(); 293 uint8_t kvm_val = kvmppc_get_cap_safe_indirect_branch(); 294 295 if (tcg_enabled() && val) { 296 /* TCG only supports broken, allow other values and print a warning */ 297 warn_report("TCG doesn't support requested feature, cap-ibs=%s", 298 cap_ibs_possible.vals[val]); 299 } else if (kvm_enabled() && (val > kvm_val)) { 300 error_setg(errp, 301 "Requested safe indirect branch capability level not supported by KVM"); 302 error_append_hint(errp, "Try appending -machine cap-ibs=%s\n", 303 cap_ibs_possible.vals[kvm_val]); 304 } 305 } 306 307 #define VALUE_DESC_TRISTATE " (broken, workaround, fixed)" 308 309 bool spapr_check_pagesize(SpaprMachineState *spapr, hwaddr pagesize, 310 Error **errp) 311 { 312 hwaddr maxpagesize = (1ULL << spapr->eff.caps[SPAPR_CAP_HPT_MAXPAGESIZE]); 313 314 if (!kvmppc_hpt_needs_host_contiguous_pages()) { 315 return true; 316 } 317 318 if (maxpagesize > pagesize) { 319 error_setg(errp, 320 "Can't support %"HWADDR_PRIu" kiB guest pages with %" 321 HWADDR_PRIu" kiB host pages with this KVM implementation", 322 maxpagesize >> 10, pagesize >> 10); 323 return false; 324 } 325 326 return true; 327 } 328 329 static void cap_hpt_maxpagesize_apply(SpaprMachineState *spapr, 330 uint8_t val, Error **errp) 331 { 332 if (val < 12) { 333 error_setg(errp, "Require at least 4kiB hpt-max-page-size"); 334 return; 335 } else if (val < 16) { 336 warn_report("Many guests require at least 64kiB hpt-max-page-size"); 337 } 338 339 spapr_check_pagesize(spapr, qemu_minrampagesize(), errp); 340 } 341 342 static bool cap_hpt_maxpagesize_migrate_needed(void *opaque) 343 { 344 return !SPAPR_MACHINE_GET_CLASS(opaque)->pre_4_1_migration; 345 } 346 347 static bool spapr_pagesize_cb(void *opaque, uint32_t seg_pshift, 348 uint32_t pshift) 349 { 350 unsigned maxshift = *((unsigned *)opaque); 351 352 assert(pshift >= seg_pshift); 353 354 /* Don't allow the guest to use pages bigger than the configured 355 * maximum size */ 356 if (pshift > maxshift) { 357 return false; 358 } 359 360 /* For whatever reason, KVM doesn't allow multiple pagesizes 361 * within a segment, *except* for the case of 16M pages in a 4k or 362 * 64k segment. Always exclude other cases, so that TCG and KVM 363 * guests see a consistent environment */ 364 if ((pshift != seg_pshift) && (pshift != 24)) { 365 return false; 366 } 367 368 return true; 369 } 370 371 static void ppc_hash64_filter_pagesizes(PowerPCCPU *cpu, 372 bool (*cb)(void *, uint32_t, uint32_t), 373 void *opaque) 374 { 375 PPCHash64Options *opts = cpu->hash64_opts; 376 int i; 377 int n = 0; 378 bool ci_largepage = false; 379 380 assert(opts); 381 382 n = 0; 383 for (i = 0; i < ARRAY_SIZE(opts->sps); i++) { 384 PPCHash64SegmentPageSizes *sps = &opts->sps[i]; 385 int j; 386 int m = 0; 387 388 assert(n <= i); 389 390 if (!sps->page_shift) { 391 break; 392 } 393 394 for (j = 0; j < ARRAY_SIZE(sps->enc); j++) { 395 PPCHash64PageSize *ps = &sps->enc[j]; 396 397 assert(m <= j); 398 if (!ps->page_shift) { 399 break; 400 } 401 402 if (cb(opaque, sps->page_shift, ps->page_shift)) { 403 if (ps->page_shift >= 16) { 404 ci_largepage = true; 405 } 406 sps->enc[m++] = *ps; 407 } 408 } 409 410 /* Clear rest of the row */ 411 for (j = m; j < ARRAY_SIZE(sps->enc); j++) { 412 memset(&sps->enc[j], 0, sizeof(sps->enc[j])); 413 } 414 415 if (m) { 416 n++; 417 } 418 } 419 420 /* Clear the rest of the table */ 421 for (i = n; i < ARRAY_SIZE(opts->sps); i++) { 422 memset(&opts->sps[i], 0, sizeof(opts->sps[i])); 423 } 424 425 if (!ci_largepage) { 426 opts->flags &= ~PPC_HASH64_CI_LARGEPAGE; 427 } 428 } 429 430 static void cap_hpt_maxpagesize_cpu_apply(SpaprMachineState *spapr, 431 PowerPCCPU *cpu, 432 uint8_t val, Error **errp) 433 { 434 unsigned maxshift = val; 435 436 ppc_hash64_filter_pagesizes(cpu, spapr_pagesize_cb, &maxshift); 437 } 438 439 static void cap_nested_kvm_hv_apply(SpaprMachineState *spapr, 440 uint8_t val, Error **errp) 441 { 442 ERRP_GUARD(); 443 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 444 CPUPPCState *env = &cpu->env; 445 446 if (!val) { 447 /* capability disabled by default */ 448 return; 449 } 450 451 if (!(env->insns_flags2 & PPC2_ISA300)) { 452 error_setg(errp, "Nested-HV only supported on POWER9 and later"); 453 error_append_hint(errp, "Try appending -machine cap-nested-hv=off\n"); 454 return; 455 } 456 457 if (kvm_enabled()) { 458 if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_3_00, 0, 459 spapr->max_compat_pvr)) { 460 error_setg(errp, "Nested-HV only supported on POWER9 and later"); 461 error_append_hint(errp, 462 "Try appending -machine max-cpu-compat=power9\n"); 463 return; 464 } 465 466 if (!kvmppc_has_cap_nested_kvm_hv()) { 467 error_setg(errp, 468 "KVM implementation does not support Nested-HV"); 469 error_append_hint(errp, 470 "Try appending -machine cap-nested-hv=off\n"); 471 } else if (kvmppc_set_cap_nested_kvm_hv(val) < 0) { 472 error_setg(errp, "Error enabling cap-nested-hv with KVM"); 473 error_append_hint(errp, 474 "Try appending -machine cap-nested-hv=off\n"); 475 } 476 } else if (tcg_enabled()) { 477 MachineState *ms = MACHINE(spapr); 478 unsigned int smp_threads = ms->smp.threads; 479 480 /* 481 * Nested-HV vCPU env state to L2, so SMT-shared SPR updates, for 482 * example, do not necessarily update the correct SPR value on sibling 483 * threads that are in a different guest/host context. 484 */ 485 if (smp_threads > 1) { 486 error_setg(errp, "TCG does not support nested-HV with SMT"); 487 error_append_hint(errp, "Try appending -machine cap-nested-hv=off " 488 "or use threads=1 with -smp\n"); 489 } 490 } 491 } 492 493 static void cap_large_decr_apply(SpaprMachineState *spapr, 494 uint8_t val, Error **errp) 495 { 496 ERRP_GUARD(); 497 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 498 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 499 500 if (!val) { 501 return; /* Disabled by default */ 502 } 503 504 if (tcg_enabled()) { 505 if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_3_00, 0, 506 spapr->max_compat_pvr)) { 507 error_setg(errp, "Large decrementer only supported on POWER9"); 508 error_append_hint(errp, "Try -cpu POWER9\n"); 509 return; 510 } 511 } else if (kvm_enabled()) { 512 int kvm_nr_bits = kvmppc_get_cap_large_decr(); 513 514 if (!kvm_nr_bits) { 515 error_setg(errp, "No large decrementer support"); 516 error_append_hint(errp, 517 "Try appending -machine cap-large-decr=off\n"); 518 } else if (pcc->lrg_decr_bits != kvm_nr_bits) { 519 error_setg(errp, 520 "KVM large decrementer size (%d) differs to model (%d)", 521 kvm_nr_bits, pcc->lrg_decr_bits); 522 error_append_hint(errp, 523 "Try appending -machine cap-large-decr=off\n"); 524 } 525 } 526 } 527 528 static void cap_large_decr_cpu_apply(SpaprMachineState *spapr, 529 PowerPCCPU *cpu, 530 uint8_t val, Error **errp) 531 { 532 ERRP_GUARD(); 533 CPUPPCState *env = &cpu->env; 534 target_ulong lpcr = env->spr[SPR_LPCR]; 535 536 if (kvm_enabled()) { 537 if (kvmppc_enable_cap_large_decr(cpu, val)) { 538 error_setg(errp, "No large decrementer support"); 539 error_append_hint(errp, 540 "Try appending -machine cap-large-decr=off\n"); 541 } 542 } 543 544 if (val) { 545 lpcr |= LPCR_LD; 546 } else { 547 lpcr &= ~LPCR_LD; 548 } 549 ppc_store_lpcr(cpu, lpcr); 550 } 551 552 static void cap_ccf_assist_apply(SpaprMachineState *spapr, uint8_t val, 553 Error **errp) 554 { 555 ERRP_GUARD(); 556 uint8_t kvm_val = kvmppc_get_cap_count_cache_flush_assist(); 557 558 if (tcg_enabled() && val) { 559 /* TCG doesn't implement anything here, but allow with a warning */ 560 warn_report("TCG doesn't support requested feature, cap-ccf-assist=on"); 561 } else if (kvm_enabled() && (val > kvm_val)) { 562 uint8_t kvm_ibs = kvmppc_get_cap_safe_indirect_branch(); 563 564 if (kvm_ibs == SPAPR_CAP_FIXED_CCD) { 565 /* 566 * If we don't have CCF assist on the host, the assist 567 * instruction is a harmless no-op. It won't correctly 568 * implement the cache count flush *but* if we have 569 * count-cache-disabled in the host, that flush is 570 * unnecessary. So, specifically allow this case. This 571 * allows us to have better performance on POWER9 DD2.3, 572 * while still working on POWER9 DD2.2 and POWER8 host 573 * cpus. 574 */ 575 return; 576 } 577 error_setg(errp, 578 "Requested count cache flush assist capability level not supported by KVM"); 579 error_append_hint(errp, "Try appending -machine cap-ccf-assist=off\n"); 580 } 581 } 582 583 static void cap_fwnmi_apply(SpaprMachineState *spapr, uint8_t val, 584 Error **errp) 585 { 586 ERRP_GUARD(); 587 if (!val) { 588 return; /* Disabled by default */ 589 } 590 591 if (kvm_enabled()) { 592 if (!kvmppc_get_fwnmi()) { 593 error_setg(errp, 594 "Firmware Assisted Non-Maskable Interrupts(FWNMI) not supported by KVM."); 595 error_append_hint(errp, "Try appending -machine cap-fwnmi=off\n"); 596 } 597 } 598 } 599 600 static void cap_rpt_invalidate_apply(SpaprMachineState *spapr, 601 uint8_t val, Error **errp) 602 { 603 ERRP_GUARD(); 604 605 if (!val) { 606 /* capability disabled by default */ 607 return; 608 } 609 610 if (tcg_enabled()) { 611 error_setg(errp, "No H_RPT_INVALIDATE support in TCG"); 612 error_append_hint(errp, 613 "Try appending -machine cap-rpt-invalidate=off\n"); 614 } else if (kvm_enabled()) { 615 if (!kvmppc_has_cap_mmu_radix()) { 616 error_setg(errp, "H_RPT_INVALIDATE only supported on Radix"); 617 return; 618 } 619 620 if (!kvmppc_has_cap_rpt_invalidate()) { 621 error_setg(errp, 622 "KVM implementation does not support H_RPT_INVALIDATE"); 623 error_append_hint(errp, 624 "Try appending -machine cap-rpt-invalidate=off\n"); 625 } else { 626 kvmppc_enable_h_rpt_invalidate(); 627 } 628 } 629 } 630 631 static void cap_ail_mode_3_apply(SpaprMachineState *spapr, 632 uint8_t val, Error **errp) 633 { 634 ERRP_GUARD(); 635 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 636 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 637 638 if (!val) { 639 return; 640 } 641 642 if (tcg_enabled()) { 643 /* AIL-3 is only supported on POWER8 and above CPUs. */ 644 if (!(pcc->insns_flags2 & PPC2_ISA207S)) { 645 error_setg(errp, "TCG only supports cap-ail-mode-3 on POWER8 and later CPUs"); 646 error_append_hint(errp, "Try appending -machine cap-ail-mode-3=off\n"); 647 return; 648 } 649 } else if (kvm_enabled()) { 650 if (!kvmppc_supports_ail_3()) { 651 error_setg(errp, "KVM implementation does not support cap-ail-mode-3"); 652 error_append_hint(errp, "Try appending -machine cap-ail-mode-3=off\n"); 653 return; 654 } 655 } 656 } 657 658 SpaprCapabilityInfo capability_table[SPAPR_CAP_NUM] = { 659 [SPAPR_CAP_HTM] = { 660 .name = "htm", 661 .description = "Allow Hardware Transactional Memory (HTM)", 662 .index = SPAPR_CAP_HTM, 663 .get = spapr_cap_get_bool, 664 .set = spapr_cap_set_bool, 665 .type = "bool", 666 .apply = cap_htm_apply, 667 }, 668 [SPAPR_CAP_VSX] = { 669 .name = "vsx", 670 .description = "Allow Vector Scalar Extensions (VSX)", 671 .index = SPAPR_CAP_VSX, 672 .get = spapr_cap_get_bool, 673 .set = spapr_cap_set_bool, 674 .type = "bool", 675 .apply = cap_vsx_apply, 676 }, 677 [SPAPR_CAP_DFP] = { 678 .name = "dfp", 679 .description = "Allow Decimal Floating Point (DFP)", 680 .index = SPAPR_CAP_DFP, 681 .get = spapr_cap_get_bool, 682 .set = spapr_cap_set_bool, 683 .type = "bool", 684 .apply = cap_dfp_apply, 685 }, 686 [SPAPR_CAP_CFPC] = { 687 .name = "cfpc", 688 .description = "Cache Flush on Privilege Change" VALUE_DESC_TRISTATE, 689 .index = SPAPR_CAP_CFPC, 690 .get = spapr_cap_get_string, 691 .set = spapr_cap_set_string, 692 .type = "string", 693 .possible = &cap_cfpc_possible, 694 .apply = cap_safe_cache_apply, 695 }, 696 [SPAPR_CAP_SBBC] = { 697 .name = "sbbc", 698 .description = "Speculation Barrier Bounds Checking" VALUE_DESC_TRISTATE, 699 .index = SPAPR_CAP_SBBC, 700 .get = spapr_cap_get_string, 701 .set = spapr_cap_set_string, 702 .type = "string", 703 .possible = &cap_sbbc_possible, 704 .apply = cap_safe_bounds_check_apply, 705 }, 706 [SPAPR_CAP_IBS] = { 707 .name = "ibs", 708 .description = 709 "Indirect Branch Speculation (broken, workaround, fixed-ibs," 710 "fixed-ccd, fixed-na)", 711 .index = SPAPR_CAP_IBS, 712 .get = spapr_cap_get_string, 713 .set = spapr_cap_set_string, 714 .type = "string", 715 .possible = &cap_ibs_possible, 716 .apply = cap_safe_indirect_branch_apply, 717 }, 718 [SPAPR_CAP_HPT_MAXPAGESIZE] = { 719 .name = "hpt-max-page-size", 720 .description = "Maximum page size for Hash Page Table guests", 721 .index = SPAPR_CAP_HPT_MAXPAGESIZE, 722 .get = spapr_cap_get_pagesize, 723 .set = spapr_cap_set_pagesize, 724 .type = "int", 725 .apply = cap_hpt_maxpagesize_apply, 726 .cpu_apply = cap_hpt_maxpagesize_cpu_apply, 727 .migrate_needed = cap_hpt_maxpagesize_migrate_needed, 728 }, 729 [SPAPR_CAP_NESTED_KVM_HV] = { 730 .name = "nested-hv", 731 .description = "Allow Nested KVM-HV", 732 .index = SPAPR_CAP_NESTED_KVM_HV, 733 .get = spapr_cap_get_bool, 734 .set = spapr_cap_set_bool, 735 .type = "bool", 736 .apply = cap_nested_kvm_hv_apply, 737 }, 738 [SPAPR_CAP_LARGE_DECREMENTER] = { 739 .name = "large-decr", 740 .description = "Allow Large Decrementer", 741 .index = SPAPR_CAP_LARGE_DECREMENTER, 742 .get = spapr_cap_get_bool, 743 .set = spapr_cap_set_bool, 744 .type = "bool", 745 .apply = cap_large_decr_apply, 746 .cpu_apply = cap_large_decr_cpu_apply, 747 }, 748 [SPAPR_CAP_CCF_ASSIST] = { 749 .name = "ccf-assist", 750 .description = "Count Cache Flush Assist via HW Instruction", 751 .index = SPAPR_CAP_CCF_ASSIST, 752 .get = spapr_cap_get_bool, 753 .set = spapr_cap_set_bool, 754 .type = "bool", 755 .apply = cap_ccf_assist_apply, 756 }, 757 [SPAPR_CAP_FWNMI] = { 758 .name = "fwnmi", 759 .description = "Implements PAPR FWNMI option", 760 .index = SPAPR_CAP_FWNMI, 761 .get = spapr_cap_get_bool, 762 .set = spapr_cap_set_bool, 763 .type = "bool", 764 .apply = cap_fwnmi_apply, 765 }, 766 [SPAPR_CAP_RPT_INVALIDATE] = { 767 .name = "rpt-invalidate", 768 .description = "Allow H_RPT_INVALIDATE", 769 .index = SPAPR_CAP_RPT_INVALIDATE, 770 .get = spapr_cap_get_bool, 771 .set = spapr_cap_set_bool, 772 .type = "bool", 773 .apply = cap_rpt_invalidate_apply, 774 }, 775 [SPAPR_CAP_AIL_MODE_3] = { 776 .name = "ail-mode-3", 777 .description = "Alternate Interrupt Location (AIL) mode 3 support", 778 .index = SPAPR_CAP_AIL_MODE_3, 779 .get = spapr_cap_get_bool, 780 .set = spapr_cap_set_bool, 781 .type = "bool", 782 .apply = cap_ail_mode_3_apply, 783 }, 784 }; 785 786 static SpaprCapabilities default_caps_with_cpu(SpaprMachineState *spapr, 787 const char *cputype) 788 { 789 SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr); 790 SpaprCapabilities caps; 791 792 caps = smc->default_caps; 793 794 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_3_00, 795 0, spapr->max_compat_pvr)) { 796 caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = SPAPR_CAP_OFF; 797 } 798 799 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_07, 800 0, spapr->max_compat_pvr)) { 801 caps.caps[SPAPR_CAP_HTM] = SPAPR_CAP_OFF; 802 caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_BROKEN; 803 caps.caps[SPAPR_CAP_AIL_MODE_3] = SPAPR_CAP_OFF; 804 } 805 806 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06_PLUS, 807 0, spapr->max_compat_pvr)) { 808 caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN; 809 } 810 811 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06, 812 0, spapr->max_compat_pvr)) { 813 caps.caps[SPAPR_CAP_VSX] = SPAPR_CAP_OFF; 814 caps.caps[SPAPR_CAP_DFP] = SPAPR_CAP_OFF; 815 caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN; 816 } 817 818 /* This is for pseries-2.12 and older */ 819 if (smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] == 0) { 820 uint8_t mps; 821 822 if (kvmppc_hpt_needs_host_contiguous_pages()) { 823 mps = ctz64(qemu_minrampagesize()); 824 } else { 825 mps = 34; /* allow everything up to 16GiB, i.e. everything */ 826 } 827 828 caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = mps; 829 } 830 831 return caps; 832 } 833 834 int spapr_caps_pre_load(void *opaque) 835 { 836 SpaprMachineState *spapr = opaque; 837 838 /* Set to default so we can tell if this came in with the migration */ 839 spapr->mig = spapr->def; 840 return 0; 841 } 842 843 int spapr_caps_pre_save(void *opaque) 844 { 845 SpaprMachineState *spapr = opaque; 846 847 spapr->mig = spapr->eff; 848 return 0; 849 } 850 851 /* This has to be called from the top-level spapr post_load, not the 852 * caps specific one. Otherwise it wouldn't be called when the source 853 * caps are all defaults, which could still conflict with overridden 854 * caps on the destination */ 855 int spapr_caps_post_migration(SpaprMachineState *spapr) 856 { 857 int i; 858 bool ok = true; 859 SpaprCapabilities dstcaps = spapr->eff; 860 SpaprCapabilities srccaps; 861 862 srccaps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); 863 for (i = 0; i < SPAPR_CAP_NUM; i++) { 864 /* If not default value then assume came in with the migration */ 865 if (spapr->mig.caps[i] != spapr->def.caps[i]) { 866 srccaps.caps[i] = spapr->mig.caps[i]; 867 } 868 } 869 870 for (i = 0; i < SPAPR_CAP_NUM; i++) { 871 SpaprCapabilityInfo *info = &capability_table[i]; 872 873 if (srccaps.caps[i] > dstcaps.caps[i]) { 874 error_report("cap-%s higher level (%d) in incoming stream than on destination (%d)", 875 info->name, srccaps.caps[i], dstcaps.caps[i]); 876 ok = false; 877 } 878 879 if (srccaps.caps[i] < dstcaps.caps[i]) { 880 warn_report("cap-%s lower level (%d) in incoming stream than on destination (%d)", 881 info->name, srccaps.caps[i], dstcaps.caps[i]); 882 } 883 } 884 885 return ok ? 0 : -EINVAL; 886 } 887 888 /* Used to generate the migration field and needed function for a spapr cap */ 889 #define SPAPR_CAP_MIG_STATE(sname, cap) \ 890 static bool spapr_cap_##sname##_needed(void *opaque) \ 891 { \ 892 SpaprMachineState *spapr = opaque; \ 893 bool (*needed)(void *opaque) = \ 894 capability_table[cap].migrate_needed; \ 895 \ 896 return needed ? needed(opaque) : true && \ 897 spapr->cmd_line_caps[cap] && \ 898 (spapr->eff.caps[cap] != \ 899 spapr->def.caps[cap]); \ 900 } \ 901 \ 902 const VMStateDescription vmstate_spapr_cap_##sname = { \ 903 .name = "spapr/cap/" #sname, \ 904 .version_id = 1, \ 905 .minimum_version_id = 1, \ 906 .needed = spapr_cap_##sname##_needed, \ 907 .fields = (VMStateField[]) { \ 908 VMSTATE_UINT8(mig.caps[cap], \ 909 SpaprMachineState), \ 910 VMSTATE_END_OF_LIST() \ 911 }, \ 912 } 913 914 SPAPR_CAP_MIG_STATE(htm, SPAPR_CAP_HTM); 915 SPAPR_CAP_MIG_STATE(vsx, SPAPR_CAP_VSX); 916 SPAPR_CAP_MIG_STATE(dfp, SPAPR_CAP_DFP); 917 SPAPR_CAP_MIG_STATE(cfpc, SPAPR_CAP_CFPC); 918 SPAPR_CAP_MIG_STATE(sbbc, SPAPR_CAP_SBBC); 919 SPAPR_CAP_MIG_STATE(ibs, SPAPR_CAP_IBS); 920 SPAPR_CAP_MIG_STATE(hpt_maxpagesize, SPAPR_CAP_HPT_MAXPAGESIZE); 921 SPAPR_CAP_MIG_STATE(nested_kvm_hv, SPAPR_CAP_NESTED_KVM_HV); 922 SPAPR_CAP_MIG_STATE(large_decr, SPAPR_CAP_LARGE_DECREMENTER); 923 SPAPR_CAP_MIG_STATE(ccf_assist, SPAPR_CAP_CCF_ASSIST); 924 SPAPR_CAP_MIG_STATE(fwnmi, SPAPR_CAP_FWNMI); 925 SPAPR_CAP_MIG_STATE(rpt_invalidate, SPAPR_CAP_RPT_INVALIDATE); 926 927 void spapr_caps_init(SpaprMachineState *spapr) 928 { 929 SpaprCapabilities default_caps; 930 int i; 931 932 /* Compute the actual set of caps we should run with */ 933 default_caps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); 934 935 for (i = 0; i < SPAPR_CAP_NUM; i++) { 936 /* Store the defaults */ 937 spapr->def.caps[i] = default_caps.caps[i]; 938 /* If not set on the command line then apply the default value */ 939 if (!spapr->cmd_line_caps[i]) { 940 spapr->eff.caps[i] = default_caps.caps[i]; 941 } 942 } 943 } 944 945 void spapr_caps_apply(SpaprMachineState *spapr) 946 { 947 int i; 948 949 for (i = 0; i < SPAPR_CAP_NUM; i++) { 950 SpaprCapabilityInfo *info = &capability_table[i]; 951 952 /* 953 * If the apply function can't set the desired level and thinks it's 954 * fatal, it should cause that. 955 */ 956 info->apply(spapr, spapr->eff.caps[i], &error_fatal); 957 } 958 } 959 960 void spapr_caps_cpu_apply(SpaprMachineState *spapr, PowerPCCPU *cpu) 961 { 962 int i; 963 964 for (i = 0; i < SPAPR_CAP_NUM; i++) { 965 SpaprCapabilityInfo *info = &capability_table[i]; 966 967 /* 968 * If the apply function can't set the desired level and thinks it's 969 * fatal, it should cause that. 970 */ 971 if (info->cpu_apply) { 972 info->cpu_apply(spapr, cpu, spapr->eff.caps[i], &error_fatal); 973 } 974 } 975 } 976 977 void spapr_caps_add_properties(SpaprMachineClass *smc) 978 { 979 ObjectClass *klass = OBJECT_CLASS(smc); 980 int i; 981 982 for (i = 0; i < ARRAY_SIZE(capability_table); i++) { 983 SpaprCapabilityInfo *cap = &capability_table[i]; 984 g_autofree char *name = g_strdup_printf("cap-%s", cap->name); 985 g_autofree char *desc = g_strdup_printf("%s", cap->description); 986 987 object_class_property_add(klass, name, cap->type, 988 cap->get, cap->set, 989 NULL, cap); 990 991 object_class_property_set_description(klass, name, desc); 992 } 993 } 994