spapr_caps.c (31538B)
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 } 477 } 478 479 static void cap_large_decr_apply(SpaprMachineState *spapr, 480 uint8_t val, Error **errp) 481 { 482 ERRP_GUARD(); 483 PowerPCCPU *cpu = POWERPC_CPU(first_cpu); 484 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 485 486 if (!val) { 487 return; /* Disabled by default */ 488 } 489 490 if (tcg_enabled()) { 491 if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_3_00, 0, 492 spapr->max_compat_pvr)) { 493 error_setg(errp, "Large decrementer only supported on POWER9"); 494 error_append_hint(errp, "Try -cpu POWER9\n"); 495 return; 496 } 497 } else if (kvm_enabled()) { 498 int kvm_nr_bits = kvmppc_get_cap_large_decr(); 499 500 if (!kvm_nr_bits) { 501 error_setg(errp, "No large decrementer support"); 502 error_append_hint(errp, 503 "Try appending -machine cap-large-decr=off\n"); 504 } else if (pcc->lrg_decr_bits != kvm_nr_bits) { 505 error_setg(errp, 506 "KVM large decrementer size (%d) differs to model (%d)", 507 kvm_nr_bits, pcc->lrg_decr_bits); 508 error_append_hint(errp, 509 "Try appending -machine cap-large-decr=off\n"); 510 } 511 } 512 } 513 514 static void cap_large_decr_cpu_apply(SpaprMachineState *spapr, 515 PowerPCCPU *cpu, 516 uint8_t val, Error **errp) 517 { 518 ERRP_GUARD(); 519 CPUPPCState *env = &cpu->env; 520 target_ulong lpcr = env->spr[SPR_LPCR]; 521 522 if (kvm_enabled()) { 523 if (kvmppc_enable_cap_large_decr(cpu, val)) { 524 error_setg(errp, "No large decrementer support"); 525 error_append_hint(errp, 526 "Try appending -machine cap-large-decr=off\n"); 527 } 528 } 529 530 if (val) { 531 lpcr |= LPCR_LD; 532 } else { 533 lpcr &= ~LPCR_LD; 534 } 535 ppc_store_lpcr(cpu, lpcr); 536 } 537 538 static void cap_ccf_assist_apply(SpaprMachineState *spapr, uint8_t val, 539 Error **errp) 540 { 541 ERRP_GUARD(); 542 uint8_t kvm_val = kvmppc_get_cap_count_cache_flush_assist(); 543 544 if (tcg_enabled() && val) { 545 /* TCG doesn't implement anything here, but allow with a warning */ 546 warn_report("TCG doesn't support requested feature, cap-ccf-assist=on"); 547 } else if (kvm_enabled() && (val > kvm_val)) { 548 uint8_t kvm_ibs = kvmppc_get_cap_safe_indirect_branch(); 549 550 if (kvm_ibs == SPAPR_CAP_FIXED_CCD) { 551 /* 552 * If we don't have CCF assist on the host, the assist 553 * instruction is a harmless no-op. It won't correctly 554 * implement the cache count flush *but* if we have 555 * count-cache-disabled in the host, that flush is 556 * unnecessary. So, specifically allow this case. This 557 * allows us to have better performance on POWER9 DD2.3, 558 * while still working on POWER9 DD2.2 and POWER8 host 559 * cpus. 560 */ 561 return; 562 } 563 error_setg(errp, 564 "Requested count cache flush assist capability level not supported by KVM"); 565 error_append_hint(errp, "Try appending -machine cap-ccf-assist=off\n"); 566 } 567 } 568 569 static void cap_fwnmi_apply(SpaprMachineState *spapr, uint8_t val, 570 Error **errp) 571 { 572 ERRP_GUARD(); 573 if (!val) { 574 return; /* Disabled by default */ 575 } 576 577 if (kvm_enabled()) { 578 if (!kvmppc_get_fwnmi()) { 579 error_setg(errp, 580 "Firmware Assisted Non-Maskable Interrupts(FWNMI) not supported by KVM."); 581 error_append_hint(errp, "Try appending -machine cap-fwnmi=off\n"); 582 } 583 } 584 } 585 586 static void cap_rpt_invalidate_apply(SpaprMachineState *spapr, 587 uint8_t val, Error **errp) 588 { 589 ERRP_GUARD(); 590 591 if (!val) { 592 /* capability disabled by default */ 593 return; 594 } 595 596 if (tcg_enabled()) { 597 error_setg(errp, "No H_RPT_INVALIDATE support in TCG"); 598 error_append_hint(errp, 599 "Try appending -machine cap-rpt-invalidate=off\n"); 600 } else if (kvm_enabled()) { 601 if (!kvmppc_has_cap_mmu_radix()) { 602 error_setg(errp, "H_RPT_INVALIDATE only supported on Radix"); 603 return; 604 } 605 606 if (!kvmppc_has_cap_rpt_invalidate()) { 607 error_setg(errp, 608 "KVM implementation does not support H_RPT_INVALIDATE"); 609 error_append_hint(errp, 610 "Try appending -machine cap-rpt-invalidate=off\n"); 611 } else { 612 kvmppc_enable_h_rpt_invalidate(); 613 } 614 } 615 } 616 617 SpaprCapabilityInfo capability_table[SPAPR_CAP_NUM] = { 618 [SPAPR_CAP_HTM] = { 619 .name = "htm", 620 .description = "Allow Hardware Transactional Memory (HTM)", 621 .index = SPAPR_CAP_HTM, 622 .get = spapr_cap_get_bool, 623 .set = spapr_cap_set_bool, 624 .type = "bool", 625 .apply = cap_htm_apply, 626 }, 627 [SPAPR_CAP_VSX] = { 628 .name = "vsx", 629 .description = "Allow Vector Scalar Extensions (VSX)", 630 .index = SPAPR_CAP_VSX, 631 .get = spapr_cap_get_bool, 632 .set = spapr_cap_set_bool, 633 .type = "bool", 634 .apply = cap_vsx_apply, 635 }, 636 [SPAPR_CAP_DFP] = { 637 .name = "dfp", 638 .description = "Allow Decimal Floating Point (DFP)", 639 .index = SPAPR_CAP_DFP, 640 .get = spapr_cap_get_bool, 641 .set = spapr_cap_set_bool, 642 .type = "bool", 643 .apply = cap_dfp_apply, 644 }, 645 [SPAPR_CAP_CFPC] = { 646 .name = "cfpc", 647 .description = "Cache Flush on Privilege Change" VALUE_DESC_TRISTATE, 648 .index = SPAPR_CAP_CFPC, 649 .get = spapr_cap_get_string, 650 .set = spapr_cap_set_string, 651 .type = "string", 652 .possible = &cap_cfpc_possible, 653 .apply = cap_safe_cache_apply, 654 }, 655 [SPAPR_CAP_SBBC] = { 656 .name = "sbbc", 657 .description = "Speculation Barrier Bounds Checking" VALUE_DESC_TRISTATE, 658 .index = SPAPR_CAP_SBBC, 659 .get = spapr_cap_get_string, 660 .set = spapr_cap_set_string, 661 .type = "string", 662 .possible = &cap_sbbc_possible, 663 .apply = cap_safe_bounds_check_apply, 664 }, 665 [SPAPR_CAP_IBS] = { 666 .name = "ibs", 667 .description = 668 "Indirect Branch Speculation (broken, workaround, fixed-ibs," 669 "fixed-ccd, fixed-na)", 670 .index = SPAPR_CAP_IBS, 671 .get = spapr_cap_get_string, 672 .set = spapr_cap_set_string, 673 .type = "string", 674 .possible = &cap_ibs_possible, 675 .apply = cap_safe_indirect_branch_apply, 676 }, 677 [SPAPR_CAP_HPT_MAXPAGESIZE] = { 678 .name = "hpt-max-page-size", 679 .description = "Maximum page size for Hash Page Table guests", 680 .index = SPAPR_CAP_HPT_MAXPAGESIZE, 681 .get = spapr_cap_get_pagesize, 682 .set = spapr_cap_set_pagesize, 683 .type = "int", 684 .apply = cap_hpt_maxpagesize_apply, 685 .cpu_apply = cap_hpt_maxpagesize_cpu_apply, 686 .migrate_needed = cap_hpt_maxpagesize_migrate_needed, 687 }, 688 [SPAPR_CAP_NESTED_KVM_HV] = { 689 .name = "nested-hv", 690 .description = "Allow Nested KVM-HV", 691 .index = SPAPR_CAP_NESTED_KVM_HV, 692 .get = spapr_cap_get_bool, 693 .set = spapr_cap_set_bool, 694 .type = "bool", 695 .apply = cap_nested_kvm_hv_apply, 696 }, 697 [SPAPR_CAP_LARGE_DECREMENTER] = { 698 .name = "large-decr", 699 .description = "Allow Large Decrementer", 700 .index = SPAPR_CAP_LARGE_DECREMENTER, 701 .get = spapr_cap_get_bool, 702 .set = spapr_cap_set_bool, 703 .type = "bool", 704 .apply = cap_large_decr_apply, 705 .cpu_apply = cap_large_decr_cpu_apply, 706 }, 707 [SPAPR_CAP_CCF_ASSIST] = { 708 .name = "ccf-assist", 709 .description = "Count Cache Flush Assist via HW Instruction", 710 .index = SPAPR_CAP_CCF_ASSIST, 711 .get = spapr_cap_get_bool, 712 .set = spapr_cap_set_bool, 713 .type = "bool", 714 .apply = cap_ccf_assist_apply, 715 }, 716 [SPAPR_CAP_FWNMI] = { 717 .name = "fwnmi", 718 .description = "Implements PAPR FWNMI option", 719 .index = SPAPR_CAP_FWNMI, 720 .get = spapr_cap_get_bool, 721 .set = spapr_cap_set_bool, 722 .type = "bool", 723 .apply = cap_fwnmi_apply, 724 }, 725 [SPAPR_CAP_RPT_INVALIDATE] = { 726 .name = "rpt-invalidate", 727 .description = "Allow H_RPT_INVALIDATE", 728 .index = SPAPR_CAP_RPT_INVALIDATE, 729 .get = spapr_cap_get_bool, 730 .set = spapr_cap_set_bool, 731 .type = "bool", 732 .apply = cap_rpt_invalidate_apply, 733 }, 734 }; 735 736 static SpaprCapabilities default_caps_with_cpu(SpaprMachineState *spapr, 737 const char *cputype) 738 { 739 SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr); 740 SpaprCapabilities caps; 741 742 caps = smc->default_caps; 743 744 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_3_00, 745 0, spapr->max_compat_pvr)) { 746 caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = SPAPR_CAP_OFF; 747 } 748 749 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_07, 750 0, spapr->max_compat_pvr)) { 751 caps.caps[SPAPR_CAP_HTM] = SPAPR_CAP_OFF; 752 caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_BROKEN; 753 } 754 755 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06_PLUS, 756 0, spapr->max_compat_pvr)) { 757 caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN; 758 } 759 760 if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_06, 761 0, spapr->max_compat_pvr)) { 762 caps.caps[SPAPR_CAP_VSX] = SPAPR_CAP_OFF; 763 caps.caps[SPAPR_CAP_DFP] = SPAPR_CAP_OFF; 764 caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN; 765 } 766 767 /* This is for pseries-2.12 and older */ 768 if (smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] == 0) { 769 uint8_t mps; 770 771 if (kvmppc_hpt_needs_host_contiguous_pages()) { 772 mps = ctz64(qemu_minrampagesize()); 773 } else { 774 mps = 34; /* allow everything up to 16GiB, i.e. everything */ 775 } 776 777 caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = mps; 778 } 779 780 return caps; 781 } 782 783 int spapr_caps_pre_load(void *opaque) 784 { 785 SpaprMachineState *spapr = opaque; 786 787 /* Set to default so we can tell if this came in with the migration */ 788 spapr->mig = spapr->def; 789 return 0; 790 } 791 792 int spapr_caps_pre_save(void *opaque) 793 { 794 SpaprMachineState *spapr = opaque; 795 796 spapr->mig = spapr->eff; 797 return 0; 798 } 799 800 /* This has to be called from the top-level spapr post_load, not the 801 * caps specific one. Otherwise it wouldn't be called when the source 802 * caps are all defaults, which could still conflict with overridden 803 * caps on the destination */ 804 int spapr_caps_post_migration(SpaprMachineState *spapr) 805 { 806 int i; 807 bool ok = true; 808 SpaprCapabilities dstcaps = spapr->eff; 809 SpaprCapabilities srccaps; 810 811 srccaps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); 812 for (i = 0; i < SPAPR_CAP_NUM; i++) { 813 /* If not default value then assume came in with the migration */ 814 if (spapr->mig.caps[i] != spapr->def.caps[i]) { 815 srccaps.caps[i] = spapr->mig.caps[i]; 816 } 817 } 818 819 for (i = 0; i < SPAPR_CAP_NUM; i++) { 820 SpaprCapabilityInfo *info = &capability_table[i]; 821 822 if (srccaps.caps[i] > dstcaps.caps[i]) { 823 error_report("cap-%s higher level (%d) in incoming stream than on destination (%d)", 824 info->name, srccaps.caps[i], dstcaps.caps[i]); 825 ok = false; 826 } 827 828 if (srccaps.caps[i] < dstcaps.caps[i]) { 829 warn_report("cap-%s lower level (%d) in incoming stream than on destination (%d)", 830 info->name, srccaps.caps[i], dstcaps.caps[i]); 831 } 832 } 833 834 return ok ? 0 : -EINVAL; 835 } 836 837 /* Used to generate the migration field and needed function for a spapr cap */ 838 #define SPAPR_CAP_MIG_STATE(sname, cap) \ 839 static bool spapr_cap_##sname##_needed(void *opaque) \ 840 { \ 841 SpaprMachineState *spapr = opaque; \ 842 bool (*needed)(void *opaque) = \ 843 capability_table[cap].migrate_needed; \ 844 \ 845 return needed ? needed(opaque) : true && \ 846 spapr->cmd_line_caps[cap] && \ 847 (spapr->eff.caps[cap] != \ 848 spapr->def.caps[cap]); \ 849 } \ 850 \ 851 const VMStateDescription vmstate_spapr_cap_##sname = { \ 852 .name = "spapr/cap/" #sname, \ 853 .version_id = 1, \ 854 .minimum_version_id = 1, \ 855 .needed = spapr_cap_##sname##_needed, \ 856 .fields = (VMStateField[]) { \ 857 VMSTATE_UINT8(mig.caps[cap], \ 858 SpaprMachineState), \ 859 VMSTATE_END_OF_LIST() \ 860 }, \ 861 } 862 863 SPAPR_CAP_MIG_STATE(htm, SPAPR_CAP_HTM); 864 SPAPR_CAP_MIG_STATE(vsx, SPAPR_CAP_VSX); 865 SPAPR_CAP_MIG_STATE(dfp, SPAPR_CAP_DFP); 866 SPAPR_CAP_MIG_STATE(cfpc, SPAPR_CAP_CFPC); 867 SPAPR_CAP_MIG_STATE(sbbc, SPAPR_CAP_SBBC); 868 SPAPR_CAP_MIG_STATE(ibs, SPAPR_CAP_IBS); 869 SPAPR_CAP_MIG_STATE(hpt_maxpagesize, SPAPR_CAP_HPT_MAXPAGESIZE); 870 SPAPR_CAP_MIG_STATE(nested_kvm_hv, SPAPR_CAP_NESTED_KVM_HV); 871 SPAPR_CAP_MIG_STATE(large_decr, SPAPR_CAP_LARGE_DECREMENTER); 872 SPAPR_CAP_MIG_STATE(ccf_assist, SPAPR_CAP_CCF_ASSIST); 873 SPAPR_CAP_MIG_STATE(fwnmi, SPAPR_CAP_FWNMI); 874 SPAPR_CAP_MIG_STATE(rpt_invalidate, SPAPR_CAP_RPT_INVALIDATE); 875 876 void spapr_caps_init(SpaprMachineState *spapr) 877 { 878 SpaprCapabilities default_caps; 879 int i; 880 881 /* Compute the actual set of caps we should run with */ 882 default_caps = default_caps_with_cpu(spapr, MACHINE(spapr)->cpu_type); 883 884 for (i = 0; i < SPAPR_CAP_NUM; i++) { 885 /* Store the defaults */ 886 spapr->def.caps[i] = default_caps.caps[i]; 887 /* If not set on the command line then apply the default value */ 888 if (!spapr->cmd_line_caps[i]) { 889 spapr->eff.caps[i] = default_caps.caps[i]; 890 } 891 } 892 } 893 894 void spapr_caps_apply(SpaprMachineState *spapr) 895 { 896 int i; 897 898 for (i = 0; i < SPAPR_CAP_NUM; i++) { 899 SpaprCapabilityInfo *info = &capability_table[i]; 900 901 /* 902 * If the apply function can't set the desired level and thinks it's 903 * fatal, it should cause that. 904 */ 905 info->apply(spapr, spapr->eff.caps[i], &error_fatal); 906 } 907 } 908 909 void spapr_caps_cpu_apply(SpaprMachineState *spapr, PowerPCCPU *cpu) 910 { 911 int i; 912 913 for (i = 0; i < SPAPR_CAP_NUM; i++) { 914 SpaprCapabilityInfo *info = &capability_table[i]; 915 916 /* 917 * If the apply function can't set the desired level and thinks it's 918 * fatal, it should cause that. 919 */ 920 if (info->cpu_apply) { 921 info->cpu_apply(spapr, cpu, spapr->eff.caps[i], &error_fatal); 922 } 923 } 924 } 925 926 void spapr_caps_add_properties(SpaprMachineClass *smc) 927 { 928 ObjectClass *klass = OBJECT_CLASS(smc); 929 int i; 930 931 for (i = 0; i < ARRAY_SIZE(capability_table); i++) { 932 SpaprCapabilityInfo *cap = &capability_table[i]; 933 g_autofree char *name = g_strdup_printf("cap-%s", cap->name); 934 g_autofree char *desc = g_strdup_printf("%s", cap->description); 935 936 object_class_property_add(klass, name, cap->type, 937 cap->get, cap->set, 938 NULL, cap); 939 940 object_class_property_set_description(klass, name, desc); 941 } 942 }