1 /* 2 * PowerPC implementation of KVM hooks 3 * 4 * Copyright IBM Corp. 2007 5 * Copyright (C) 2011 Freescale Semiconductor, Inc. 6 * 7 * Authors: 8 * Jerone Young <jyoung5@us.ibm.com> 9 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> 10 * Hollis Blanchard <hollisb@us.ibm.com> 11 * 12 * This work is licensed under the terms of the GNU GPL, version 2 or later. 13 * See the COPYING file in the top-level directory. 14 * 15 */ 16 17 #include "qemu/osdep.h" 18 #include <dirent.h> 19 #include <sys/ioctl.h> 20 #include <sys/vfs.h> 21 22 #include <linux/kvm.h> 23 24 #include "qapi/error.h" 25 #include "qemu/error-report.h" 26 #include "cpu.h" 27 #include "cpu-models.h" 28 #include "qemu/timer.h" 29 #include "sysemu/hw_accel.h" 30 #include "kvm_ppc.h" 31 #include "sysemu/cpus.h" 32 #include "sysemu/device_tree.h" 33 #include "mmu-hash64.h" 34 35 #include "hw/sysbus.h" 36 #include "hw/ppc/spapr.h" 37 #include "hw/ppc/spapr_cpu_core.h" 38 #include "hw/hw.h" 39 #include "hw/ppc/ppc.h" 40 #include "migration/qemu-file-types.h" 41 #include "sysemu/watchdog.h" 42 #include "trace.h" 43 #include "exec/gdbstub.h" 44 #include "exec/memattrs.h" 45 #include "exec/ram_addr.h" 46 #include "sysemu/hostmem.h" 47 #include "qemu/cutils.h" 48 #include "qemu/main-loop.h" 49 #include "qemu/mmap-alloc.h" 50 #include "elf.h" 51 #include "sysemu/kvm_int.h" 52 53 #define PROC_DEVTREE_CPU "/proc/device-tree/cpus/" 54 55 #define DEBUG_RETURN_GUEST 0 56 #define DEBUG_RETURN_GDB 1 57 58 const KVMCapabilityInfo kvm_arch_required_capabilities[] = { 59 KVM_CAP_LAST_INFO 60 }; 61 62 static int cap_interrupt_unset; 63 static int cap_segstate; 64 static int cap_booke_sregs; 65 static int cap_ppc_smt; 66 static int cap_ppc_smt_possible; 67 static int cap_spapr_tce; 68 static int cap_spapr_tce_64; 69 static int cap_spapr_multitce; 70 static int cap_spapr_vfio; 71 static int cap_hior; 72 static int cap_one_reg; 73 static int cap_epr; 74 static int cap_ppc_watchdog; 75 static int cap_papr; 76 static int cap_htab_fd; 77 static int cap_fixup_hcalls; 78 static int cap_htm; /* Hardware transactional memory support */ 79 static int cap_mmu_radix; 80 static int cap_mmu_hash_v3; 81 static int cap_xive; 82 static int cap_resize_hpt; 83 static int cap_ppc_pvr_compat; 84 static int cap_ppc_safe_cache; 85 static int cap_ppc_safe_bounds_check; 86 static int cap_ppc_safe_indirect_branch; 87 static int cap_ppc_count_cache_flush_assist; 88 static int cap_ppc_nested_kvm_hv; 89 static int cap_large_decr; 90 static int cap_fwnmi; 91 static int cap_rpt_invalidate; 92 93 static uint32_t debug_inst_opcode; 94 95 /* 96 * Check whether we are running with KVM-PR (instead of KVM-HV). This 97 * should only be used for fallback tests - generally we should use 98 * explicit capabilities for the features we want, rather than 99 * assuming what is/isn't available depending on the KVM variant. 100 */ 101 static bool kvmppc_is_pr(KVMState *ks) 102 { 103 /* Assume KVM-PR if the GET_PVINFO capability is available */ 104 return kvm_vm_check_extension(ks, KVM_CAP_PPC_GET_PVINFO) != 0; 105 } 106 107 static int kvm_ppc_register_host_cpu_type(void); 108 static void kvmppc_get_cpu_characteristics(KVMState *s); 109 static int kvmppc_get_dec_bits(void); 110 111 int kvm_arch_init(MachineState *ms, KVMState *s) 112 { 113 cap_interrupt_unset = kvm_check_extension(s, KVM_CAP_PPC_UNSET_IRQ); 114 cap_segstate = kvm_check_extension(s, KVM_CAP_PPC_SEGSTATE); 115 cap_booke_sregs = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_SREGS); 116 cap_ppc_smt_possible = kvm_vm_check_extension(s, KVM_CAP_PPC_SMT_POSSIBLE); 117 cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE); 118 cap_spapr_tce_64 = kvm_check_extension(s, KVM_CAP_SPAPR_TCE_64); 119 cap_spapr_multitce = kvm_check_extension(s, KVM_CAP_SPAPR_MULTITCE); 120 cap_spapr_vfio = kvm_vm_check_extension(s, KVM_CAP_SPAPR_TCE_VFIO); 121 cap_one_reg = kvm_check_extension(s, KVM_CAP_ONE_REG); 122 cap_hior = kvm_check_extension(s, KVM_CAP_PPC_HIOR); 123 cap_epr = kvm_check_extension(s, KVM_CAP_PPC_EPR); 124 cap_ppc_watchdog = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_WATCHDOG); 125 /* 126 * Note: we don't set cap_papr here, because this capability is 127 * only activated after this by kvmppc_set_papr() 128 */ 129 cap_htab_fd = kvm_vm_check_extension(s, KVM_CAP_PPC_HTAB_FD); 130 cap_fixup_hcalls = kvm_check_extension(s, KVM_CAP_PPC_FIXUP_HCALL); 131 cap_ppc_smt = kvm_vm_check_extension(s, KVM_CAP_PPC_SMT); 132 cap_htm = kvm_vm_check_extension(s, KVM_CAP_PPC_HTM); 133 cap_mmu_radix = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_RADIX); 134 cap_mmu_hash_v3 = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_HASH_V3); 135 cap_xive = kvm_vm_check_extension(s, KVM_CAP_PPC_IRQ_XIVE); 136 cap_resize_hpt = kvm_vm_check_extension(s, KVM_CAP_SPAPR_RESIZE_HPT); 137 kvmppc_get_cpu_characteristics(s); 138 cap_ppc_nested_kvm_hv = kvm_vm_check_extension(s, KVM_CAP_PPC_NESTED_HV); 139 cap_large_decr = kvmppc_get_dec_bits(); 140 cap_fwnmi = kvm_vm_check_extension(s, KVM_CAP_PPC_FWNMI); 141 /* 142 * Note: setting it to false because there is not such capability 143 * in KVM at this moment. 144 * 145 * TODO: call kvm_vm_check_extension() with the right capability 146 * after the kernel starts implementing it. 147 */ 148 cap_ppc_pvr_compat = false; 149 150 if (!kvm_check_extension(s, KVM_CAP_PPC_IRQ_LEVEL)) { 151 error_report("KVM: Host kernel doesn't have level irq capability"); 152 exit(1); 153 } 154 155 cap_rpt_invalidate = kvm_vm_check_extension(s, KVM_CAP_PPC_RPT_INVALIDATE); 156 kvm_ppc_register_host_cpu_type(); 157 158 return 0; 159 } 160 161 int kvm_arch_irqchip_create(KVMState *s) 162 { 163 return 0; 164 } 165 166 static int kvm_arch_sync_sregs(PowerPCCPU *cpu) 167 { 168 CPUPPCState *cenv = &cpu->env; 169 CPUState *cs = CPU(cpu); 170 struct kvm_sregs sregs; 171 int ret; 172 173 if (cenv->excp_model == POWERPC_EXCP_BOOKE) { 174 /* 175 * What we're really trying to say is "if we're on BookE, we 176 * use the native PVR for now". This is the only sane way to 177 * check it though, so we potentially confuse users that they 178 * can run BookE guests on BookS. Let's hope nobody dares 179 * enough :) 180 */ 181 return 0; 182 } else { 183 if (!cap_segstate) { 184 fprintf(stderr, "kvm error: missing PVR setting capability\n"); 185 return -ENOSYS; 186 } 187 } 188 189 ret = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs); 190 if (ret) { 191 return ret; 192 } 193 194 sregs.pvr = cenv->spr[SPR_PVR]; 195 return kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs); 196 } 197 198 /* Set up a shared TLB array with KVM */ 199 static int kvm_booke206_tlb_init(PowerPCCPU *cpu) 200 { 201 CPUPPCState *env = &cpu->env; 202 CPUState *cs = CPU(cpu); 203 struct kvm_book3e_206_tlb_params params = {}; 204 struct kvm_config_tlb cfg = {}; 205 unsigned int entries = 0; 206 int ret, i; 207 208 if (!kvm_enabled() || 209 !kvm_check_extension(cs->kvm_state, KVM_CAP_SW_TLB)) { 210 return 0; 211 } 212 213 assert(ARRAY_SIZE(params.tlb_sizes) == BOOKE206_MAX_TLBN); 214 215 for (i = 0; i < BOOKE206_MAX_TLBN; i++) { 216 params.tlb_sizes[i] = booke206_tlb_size(env, i); 217 params.tlb_ways[i] = booke206_tlb_ways(env, i); 218 entries += params.tlb_sizes[i]; 219 } 220 221 assert(entries == env->nb_tlb); 222 assert(sizeof(struct kvm_book3e_206_tlb_entry) == sizeof(ppcmas_tlb_t)); 223 224 env->tlb_dirty = true; 225 226 cfg.array = (uintptr_t)env->tlb.tlbm; 227 cfg.array_len = sizeof(ppcmas_tlb_t) * entries; 228 cfg.params = (uintptr_t)¶ms; 229 cfg.mmu_type = KVM_MMU_FSL_BOOKE_NOHV; 230 231 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_SW_TLB, 0, (uintptr_t)&cfg); 232 if (ret < 0) { 233 fprintf(stderr, "%s: couldn't enable KVM_CAP_SW_TLB: %s\n", 234 __func__, strerror(-ret)); 235 return ret; 236 } 237 238 env->kvm_sw_tlb = true; 239 return 0; 240 } 241 242 243 #if defined(TARGET_PPC64) 244 static void kvm_get_smmu_info(struct kvm_ppc_smmu_info *info, Error **errp) 245 { 246 int ret; 247 248 assert(kvm_state != NULL); 249 250 if (!kvm_check_extension(kvm_state, KVM_CAP_PPC_GET_SMMU_INFO)) { 251 error_setg(errp, "KVM doesn't expose the MMU features it supports"); 252 error_append_hint(errp, "Consider switching to a newer KVM\n"); 253 return; 254 } 255 256 ret = kvm_vm_ioctl(kvm_state, KVM_PPC_GET_SMMU_INFO, info); 257 if (ret == 0) { 258 return; 259 } 260 261 error_setg_errno(errp, -ret, 262 "KVM failed to provide the MMU features it supports"); 263 } 264 265 struct ppc_radix_page_info *kvm_get_radix_page_info(void) 266 { 267 KVMState *s = KVM_STATE(current_accel()); 268 struct ppc_radix_page_info *radix_page_info; 269 struct kvm_ppc_rmmu_info rmmu_info = { }; 270 int i; 271 272 if (!kvm_check_extension(s, KVM_CAP_PPC_MMU_RADIX)) { 273 return NULL; 274 } 275 if (kvm_vm_ioctl(s, KVM_PPC_GET_RMMU_INFO, &rmmu_info)) { 276 return NULL; 277 } 278 radix_page_info = g_malloc0(sizeof(*radix_page_info)); 279 radix_page_info->count = 0; 280 for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) { 281 if (rmmu_info.ap_encodings[i]) { 282 radix_page_info->entries[i] = rmmu_info.ap_encodings[i]; 283 radix_page_info->count++; 284 } 285 } 286 return radix_page_info; 287 } 288 289 target_ulong kvmppc_configure_v3_mmu(PowerPCCPU *cpu, 290 bool radix, bool gtse, 291 uint64_t proc_tbl) 292 { 293 CPUState *cs = CPU(cpu); 294 int ret; 295 uint64_t flags = 0; 296 struct kvm_ppc_mmuv3_cfg cfg = { 297 .process_table = proc_tbl, 298 }; 299 300 if (radix) { 301 flags |= KVM_PPC_MMUV3_RADIX; 302 } 303 if (gtse) { 304 flags |= KVM_PPC_MMUV3_GTSE; 305 } 306 cfg.flags = flags; 307 ret = kvm_vm_ioctl(cs->kvm_state, KVM_PPC_CONFIGURE_V3_MMU, &cfg); 308 switch (ret) { 309 case 0: 310 return H_SUCCESS; 311 case -EINVAL: 312 return H_PARAMETER; 313 case -ENODEV: 314 return H_NOT_AVAILABLE; 315 default: 316 return H_HARDWARE; 317 } 318 } 319 320 bool kvmppc_hpt_needs_host_contiguous_pages(void) 321 { 322 static struct kvm_ppc_smmu_info smmu_info; 323 324 if (!kvm_enabled()) { 325 return false; 326 } 327 328 kvm_get_smmu_info(&smmu_info, &error_fatal); 329 return !!(smmu_info.flags & KVM_PPC_PAGE_SIZES_REAL); 330 } 331 332 void kvm_check_mmu(PowerPCCPU *cpu, Error **errp) 333 { 334 struct kvm_ppc_smmu_info smmu_info; 335 int iq, ik, jq, jk; 336 Error *local_err = NULL; 337 338 /* For now, we only have anything to check on hash64 MMUs */ 339 if (!cpu->hash64_opts || !kvm_enabled()) { 340 return; 341 } 342 343 kvm_get_smmu_info(&smmu_info, &local_err); 344 if (local_err) { 345 error_propagate(errp, local_err); 346 return; 347 } 348 349 if (ppc_hash64_has(cpu, PPC_HASH64_1TSEG) 350 && !(smmu_info.flags & KVM_PPC_1T_SEGMENTS)) { 351 error_setg(errp, 352 "KVM does not support 1TiB segments which guest expects"); 353 return; 354 } 355 356 if (smmu_info.slb_size < cpu->hash64_opts->slb_size) { 357 error_setg(errp, "KVM only supports %u SLB entries, but guest needs %u", 358 smmu_info.slb_size, cpu->hash64_opts->slb_size); 359 return; 360 } 361 362 /* 363 * Verify that every pagesize supported by the cpu model is 364 * supported by KVM with the same encodings 365 */ 366 for (iq = 0; iq < ARRAY_SIZE(cpu->hash64_opts->sps); iq++) { 367 PPCHash64SegmentPageSizes *qsps = &cpu->hash64_opts->sps[iq]; 368 struct kvm_ppc_one_seg_page_size *ksps; 369 370 for (ik = 0; ik < ARRAY_SIZE(smmu_info.sps); ik++) { 371 if (qsps->page_shift == smmu_info.sps[ik].page_shift) { 372 break; 373 } 374 } 375 if (ik >= ARRAY_SIZE(smmu_info.sps)) { 376 error_setg(errp, "KVM doesn't support for base page shift %u", 377 qsps->page_shift); 378 return; 379 } 380 381 ksps = &smmu_info.sps[ik]; 382 if (ksps->slb_enc != qsps->slb_enc) { 383 error_setg(errp, 384 "KVM uses SLB encoding 0x%x for page shift %u, but guest expects 0x%x", 385 ksps->slb_enc, ksps->page_shift, qsps->slb_enc); 386 return; 387 } 388 389 for (jq = 0; jq < ARRAY_SIZE(qsps->enc); jq++) { 390 for (jk = 0; jk < ARRAY_SIZE(ksps->enc); jk++) { 391 if (qsps->enc[jq].page_shift == ksps->enc[jk].page_shift) { 392 break; 393 } 394 } 395 396 if (jk >= ARRAY_SIZE(ksps->enc)) { 397 error_setg(errp, "KVM doesn't support page shift %u/%u", 398 qsps->enc[jq].page_shift, qsps->page_shift); 399 return; 400 } 401 if (qsps->enc[jq].pte_enc != ksps->enc[jk].pte_enc) { 402 error_setg(errp, 403 "KVM uses PTE encoding 0x%x for page shift %u/%u, but guest expects 0x%x", 404 ksps->enc[jk].pte_enc, qsps->enc[jq].page_shift, 405 qsps->page_shift, qsps->enc[jq].pte_enc); 406 return; 407 } 408 } 409 } 410 411 if (ppc_hash64_has(cpu, PPC_HASH64_CI_LARGEPAGE)) { 412 /* 413 * Mostly what guest pagesizes we can use are related to the 414 * host pages used to map guest RAM, which is handled in the 415 * platform code. Cache-Inhibited largepages (64k) however are 416 * used for I/O, so if they're mapped to the host at all it 417 * will be a normal mapping, not a special hugepage one used 418 * for RAM. 419 */ 420 if (qemu_real_host_page_size() < 0x10000) { 421 error_setg(errp, 422 "KVM can't supply 64kiB CI pages, which guest expects"); 423 } 424 } 425 } 426 #endif /* !defined (TARGET_PPC64) */ 427 428 unsigned long kvm_arch_vcpu_id(CPUState *cpu) 429 { 430 return POWERPC_CPU(cpu)->vcpu_id; 431 } 432 433 /* 434 * e500 supports 2 h/w breakpoint and 2 watchpoint. book3s supports 435 * only 1 watchpoint, so array size of 4 is sufficient for now. 436 */ 437 #define MAX_HW_BKPTS 4 438 439 static struct HWBreakpoint { 440 target_ulong addr; 441 int type; 442 } hw_debug_points[MAX_HW_BKPTS]; 443 444 static CPUWatchpoint hw_watchpoint; 445 446 /* Default there is no breakpoint and watchpoint supported */ 447 static int max_hw_breakpoint; 448 static int max_hw_watchpoint; 449 static int nb_hw_breakpoint; 450 static int nb_hw_watchpoint; 451 452 static void kvmppc_hw_debug_points_init(CPUPPCState *cenv) 453 { 454 if (cenv->excp_model == POWERPC_EXCP_BOOKE) { 455 max_hw_breakpoint = 2; 456 max_hw_watchpoint = 2; 457 } 458 459 if ((max_hw_breakpoint + max_hw_watchpoint) > MAX_HW_BKPTS) { 460 fprintf(stderr, "Error initializing h/w breakpoints\n"); 461 return; 462 } 463 } 464 465 int kvm_arch_init_vcpu(CPUState *cs) 466 { 467 PowerPCCPU *cpu = POWERPC_CPU(cs); 468 CPUPPCState *cenv = &cpu->env; 469 int ret; 470 471 /* Synchronize sregs with kvm */ 472 ret = kvm_arch_sync_sregs(cpu); 473 if (ret) { 474 if (ret == -EINVAL) { 475 error_report("Register sync failed... If you're using kvm-hv.ko," 476 " only \"-cpu host\" is possible"); 477 } 478 return ret; 479 } 480 481 switch (cenv->mmu_model) { 482 case POWERPC_MMU_BOOKE206: 483 /* This target supports access to KVM's guest TLB */ 484 ret = kvm_booke206_tlb_init(cpu); 485 break; 486 case POWERPC_MMU_2_07: 487 if (!cap_htm && !kvmppc_is_pr(cs->kvm_state)) { 488 /* 489 * KVM-HV has transactional memory on POWER8 also without 490 * the KVM_CAP_PPC_HTM extension, so enable it here 491 * instead as long as it's available to userspace on the 492 * host. 493 */ 494 if (qemu_getauxval(AT_HWCAP2) & PPC_FEATURE2_HAS_HTM) { 495 cap_htm = true; 496 } 497 } 498 break; 499 default: 500 break; 501 } 502 503 kvm_get_one_reg(cs, KVM_REG_PPC_DEBUG_INST, &debug_inst_opcode); 504 kvmppc_hw_debug_points_init(cenv); 505 506 return ret; 507 } 508 509 int kvm_arch_destroy_vcpu(CPUState *cs) 510 { 511 return 0; 512 } 513 514 static void kvm_sw_tlb_put(PowerPCCPU *cpu) 515 { 516 CPUPPCState *env = &cpu->env; 517 CPUState *cs = CPU(cpu); 518 struct kvm_dirty_tlb dirty_tlb; 519 unsigned char *bitmap; 520 int ret; 521 522 if (!env->kvm_sw_tlb) { 523 return; 524 } 525 526 bitmap = g_malloc((env->nb_tlb + 7) / 8); 527 memset(bitmap, 0xFF, (env->nb_tlb + 7) / 8); 528 529 dirty_tlb.bitmap = (uintptr_t)bitmap; 530 dirty_tlb.num_dirty = env->nb_tlb; 531 532 ret = kvm_vcpu_ioctl(cs, KVM_DIRTY_TLB, &dirty_tlb); 533 if (ret) { 534 fprintf(stderr, "%s: KVM_DIRTY_TLB: %s\n", 535 __func__, strerror(-ret)); 536 } 537 538 g_free(bitmap); 539 } 540 541 static void kvm_get_one_spr(CPUState *cs, uint64_t id, int spr) 542 { 543 PowerPCCPU *cpu = POWERPC_CPU(cs); 544 CPUPPCState *env = &cpu->env; 545 /* Init 'val' to avoid "uninitialised value" Valgrind warnings */ 546 union { 547 uint32_t u32; 548 uint64_t u64; 549 } val = { }; 550 struct kvm_one_reg reg = { 551 .id = id, 552 .addr = (uintptr_t) &val, 553 }; 554 int ret; 555 556 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 557 if (ret != 0) { 558 trace_kvm_failed_spr_get(spr, strerror(errno)); 559 } else { 560 switch (id & KVM_REG_SIZE_MASK) { 561 case KVM_REG_SIZE_U32: 562 env->spr[spr] = val.u32; 563 break; 564 565 case KVM_REG_SIZE_U64: 566 env->spr[spr] = val.u64; 567 break; 568 569 default: 570 /* Don't handle this size yet */ 571 abort(); 572 } 573 } 574 } 575 576 static void kvm_put_one_spr(CPUState *cs, uint64_t id, int spr) 577 { 578 PowerPCCPU *cpu = POWERPC_CPU(cs); 579 CPUPPCState *env = &cpu->env; 580 union { 581 uint32_t u32; 582 uint64_t u64; 583 } val; 584 struct kvm_one_reg reg = { 585 .id = id, 586 .addr = (uintptr_t) &val, 587 }; 588 int ret; 589 590 switch (id & KVM_REG_SIZE_MASK) { 591 case KVM_REG_SIZE_U32: 592 val.u32 = env->spr[spr]; 593 break; 594 595 case KVM_REG_SIZE_U64: 596 val.u64 = env->spr[spr]; 597 break; 598 599 default: 600 /* Don't handle this size yet */ 601 abort(); 602 } 603 604 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 605 if (ret != 0) { 606 trace_kvm_failed_spr_set(spr, strerror(errno)); 607 } 608 } 609 610 static int kvm_put_fp(CPUState *cs) 611 { 612 PowerPCCPU *cpu = POWERPC_CPU(cs); 613 CPUPPCState *env = &cpu->env; 614 struct kvm_one_reg reg; 615 int i; 616 int ret; 617 618 if (env->insns_flags & PPC_FLOAT) { 619 uint64_t fpscr = env->fpscr; 620 bool vsx = !!(env->insns_flags2 & PPC2_VSX); 621 622 reg.id = KVM_REG_PPC_FPSCR; 623 reg.addr = (uintptr_t)&fpscr; 624 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 625 if (ret < 0) { 626 trace_kvm_failed_fpscr_set(strerror(errno)); 627 return ret; 628 } 629 630 for (i = 0; i < 32; i++) { 631 uint64_t vsr[2]; 632 uint64_t *fpr = cpu_fpr_ptr(&cpu->env, i); 633 uint64_t *vsrl = cpu_vsrl_ptr(&cpu->env, i); 634 635 #if HOST_BIG_ENDIAN 636 vsr[0] = float64_val(*fpr); 637 vsr[1] = *vsrl; 638 #else 639 vsr[0] = *vsrl; 640 vsr[1] = float64_val(*fpr); 641 #endif 642 reg.addr = (uintptr_t) &vsr; 643 reg.id = vsx ? KVM_REG_PPC_VSR(i) : KVM_REG_PPC_FPR(i); 644 645 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 646 if (ret < 0) { 647 trace_kvm_failed_fp_set(vsx ? "VSR" : "FPR", i, 648 strerror(errno)); 649 return ret; 650 } 651 } 652 } 653 654 if (env->insns_flags & PPC_ALTIVEC) { 655 reg.id = KVM_REG_PPC_VSCR; 656 reg.addr = (uintptr_t)&env->vscr; 657 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 658 if (ret < 0) { 659 trace_kvm_failed_vscr_set(strerror(errno)); 660 return ret; 661 } 662 663 for (i = 0; i < 32; i++) { 664 reg.id = KVM_REG_PPC_VR(i); 665 reg.addr = (uintptr_t)cpu_avr_ptr(env, i); 666 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 667 if (ret < 0) { 668 trace_kvm_failed_vr_set(i, strerror(errno)); 669 return ret; 670 } 671 } 672 } 673 674 return 0; 675 } 676 677 static int kvm_get_fp(CPUState *cs) 678 { 679 PowerPCCPU *cpu = POWERPC_CPU(cs); 680 CPUPPCState *env = &cpu->env; 681 struct kvm_one_reg reg; 682 int i; 683 int ret; 684 685 if (env->insns_flags & PPC_FLOAT) { 686 uint64_t fpscr; 687 bool vsx = !!(env->insns_flags2 & PPC2_VSX); 688 689 reg.id = KVM_REG_PPC_FPSCR; 690 reg.addr = (uintptr_t)&fpscr; 691 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 692 if (ret < 0) { 693 trace_kvm_failed_fpscr_get(strerror(errno)); 694 return ret; 695 } else { 696 env->fpscr = fpscr; 697 } 698 699 for (i = 0; i < 32; i++) { 700 uint64_t vsr[2]; 701 uint64_t *fpr = cpu_fpr_ptr(&cpu->env, i); 702 uint64_t *vsrl = cpu_vsrl_ptr(&cpu->env, i); 703 704 reg.addr = (uintptr_t) &vsr; 705 reg.id = vsx ? KVM_REG_PPC_VSR(i) : KVM_REG_PPC_FPR(i); 706 707 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 708 if (ret < 0) { 709 trace_kvm_failed_fp_get(vsx ? "VSR" : "FPR", i, 710 strerror(errno)); 711 return ret; 712 } else { 713 #if HOST_BIG_ENDIAN 714 *fpr = vsr[0]; 715 if (vsx) { 716 *vsrl = vsr[1]; 717 } 718 #else 719 *fpr = vsr[1]; 720 if (vsx) { 721 *vsrl = vsr[0]; 722 } 723 #endif 724 } 725 } 726 } 727 728 if (env->insns_flags & PPC_ALTIVEC) { 729 reg.id = KVM_REG_PPC_VSCR; 730 reg.addr = (uintptr_t)&env->vscr; 731 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 732 if (ret < 0) { 733 trace_kvm_failed_vscr_get(strerror(errno)); 734 return ret; 735 } 736 737 for (i = 0; i < 32; i++) { 738 reg.id = KVM_REG_PPC_VR(i); 739 reg.addr = (uintptr_t)cpu_avr_ptr(env, i); 740 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 741 if (ret < 0) { 742 trace_kvm_failed_vr_get(i, strerror(errno)); 743 return ret; 744 } 745 } 746 } 747 748 return 0; 749 } 750 751 #if defined(TARGET_PPC64) 752 static int kvm_get_vpa(CPUState *cs) 753 { 754 PowerPCCPU *cpu = POWERPC_CPU(cs); 755 SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu); 756 struct kvm_one_reg reg; 757 int ret; 758 759 reg.id = KVM_REG_PPC_VPA_ADDR; 760 reg.addr = (uintptr_t)&spapr_cpu->vpa_addr; 761 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 762 if (ret < 0) { 763 trace_kvm_failed_vpa_addr_get(strerror(errno)); 764 return ret; 765 } 766 767 assert((uintptr_t)&spapr_cpu->slb_shadow_size 768 == ((uintptr_t)&spapr_cpu->slb_shadow_addr + 8)); 769 reg.id = KVM_REG_PPC_VPA_SLB; 770 reg.addr = (uintptr_t)&spapr_cpu->slb_shadow_addr; 771 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 772 if (ret < 0) { 773 trace_kvm_failed_slb_get(strerror(errno)); 774 return ret; 775 } 776 777 assert((uintptr_t)&spapr_cpu->dtl_size 778 == ((uintptr_t)&spapr_cpu->dtl_addr + 8)); 779 reg.id = KVM_REG_PPC_VPA_DTL; 780 reg.addr = (uintptr_t)&spapr_cpu->dtl_addr; 781 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 782 if (ret < 0) { 783 trace_kvm_failed_dtl_get(strerror(errno)); 784 return ret; 785 } 786 787 return 0; 788 } 789 790 static int kvm_put_vpa(CPUState *cs) 791 { 792 PowerPCCPU *cpu = POWERPC_CPU(cs); 793 SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu); 794 struct kvm_one_reg reg; 795 int ret; 796 797 /* 798 * SLB shadow or DTL can't be registered unless a master VPA is 799 * registered. That means when restoring state, if a VPA *is* 800 * registered, we need to set that up first. If not, we need to 801 * deregister the others before deregistering the master VPA 802 */ 803 assert(spapr_cpu->vpa_addr 804 || !(spapr_cpu->slb_shadow_addr || spapr_cpu->dtl_addr)); 805 806 if (spapr_cpu->vpa_addr) { 807 reg.id = KVM_REG_PPC_VPA_ADDR; 808 reg.addr = (uintptr_t)&spapr_cpu->vpa_addr; 809 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 810 if (ret < 0) { 811 trace_kvm_failed_vpa_addr_set(strerror(errno)); 812 return ret; 813 } 814 } 815 816 assert((uintptr_t)&spapr_cpu->slb_shadow_size 817 == ((uintptr_t)&spapr_cpu->slb_shadow_addr + 8)); 818 reg.id = KVM_REG_PPC_VPA_SLB; 819 reg.addr = (uintptr_t)&spapr_cpu->slb_shadow_addr; 820 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 821 if (ret < 0) { 822 trace_kvm_failed_slb_set(strerror(errno)); 823 return ret; 824 } 825 826 assert((uintptr_t)&spapr_cpu->dtl_size 827 == ((uintptr_t)&spapr_cpu->dtl_addr + 8)); 828 reg.id = KVM_REG_PPC_VPA_DTL; 829 reg.addr = (uintptr_t)&spapr_cpu->dtl_addr; 830 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 831 if (ret < 0) { 832 trace_kvm_failed_dtl_set(strerror(errno)); 833 return ret; 834 } 835 836 if (!spapr_cpu->vpa_addr) { 837 reg.id = KVM_REG_PPC_VPA_ADDR; 838 reg.addr = (uintptr_t)&spapr_cpu->vpa_addr; 839 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 840 if (ret < 0) { 841 trace_kvm_failed_null_vpa_addr_set(strerror(errno)); 842 return ret; 843 } 844 } 845 846 return 0; 847 } 848 #endif /* TARGET_PPC64 */ 849 850 int kvmppc_put_books_sregs(PowerPCCPU *cpu) 851 { 852 CPUPPCState *env = &cpu->env; 853 struct kvm_sregs sregs = { }; 854 int i; 855 856 sregs.pvr = env->spr[SPR_PVR]; 857 858 if (cpu->vhyp) { 859 PPCVirtualHypervisorClass *vhc = 860 PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp); 861 sregs.u.s.sdr1 = vhc->encode_hpt_for_kvm_pr(cpu->vhyp); 862 } else { 863 sregs.u.s.sdr1 = env->spr[SPR_SDR1]; 864 } 865 866 /* Sync SLB */ 867 #ifdef TARGET_PPC64 868 for (i = 0; i < ARRAY_SIZE(env->slb); i++) { 869 sregs.u.s.ppc64.slb[i].slbe = env->slb[i].esid; 870 if (env->slb[i].esid & SLB_ESID_V) { 871 sregs.u.s.ppc64.slb[i].slbe |= i; 872 } 873 sregs.u.s.ppc64.slb[i].slbv = env->slb[i].vsid; 874 } 875 #endif 876 877 /* Sync SRs */ 878 for (i = 0; i < 16; i++) { 879 sregs.u.s.ppc32.sr[i] = env->sr[i]; 880 } 881 882 /* Sync BATs */ 883 for (i = 0; i < 8; i++) { 884 /* Beware. We have to swap upper and lower bits here */ 885 sregs.u.s.ppc32.dbat[i] = ((uint64_t)env->DBAT[0][i] << 32) 886 | env->DBAT[1][i]; 887 sregs.u.s.ppc32.ibat[i] = ((uint64_t)env->IBAT[0][i] << 32) 888 | env->IBAT[1][i]; 889 } 890 891 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_SREGS, &sregs); 892 } 893 894 int kvm_arch_put_registers(CPUState *cs, int level) 895 { 896 PowerPCCPU *cpu = POWERPC_CPU(cs); 897 CPUPPCState *env = &cpu->env; 898 struct kvm_regs regs; 899 int ret; 900 int i; 901 902 ret = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s); 903 if (ret < 0) { 904 return ret; 905 } 906 907 regs.ctr = env->ctr; 908 regs.lr = env->lr; 909 regs.xer = cpu_read_xer(env); 910 regs.msr = env->msr; 911 regs.pc = env->nip; 912 913 regs.srr0 = env->spr[SPR_SRR0]; 914 regs.srr1 = env->spr[SPR_SRR1]; 915 916 regs.sprg0 = env->spr[SPR_SPRG0]; 917 regs.sprg1 = env->spr[SPR_SPRG1]; 918 regs.sprg2 = env->spr[SPR_SPRG2]; 919 regs.sprg3 = env->spr[SPR_SPRG3]; 920 regs.sprg4 = env->spr[SPR_SPRG4]; 921 regs.sprg5 = env->spr[SPR_SPRG5]; 922 regs.sprg6 = env->spr[SPR_SPRG6]; 923 regs.sprg7 = env->spr[SPR_SPRG7]; 924 925 regs.pid = env->spr[SPR_BOOKE_PID]; 926 927 for (i = 0; i < 32; i++) { 928 regs.gpr[i] = env->gpr[i]; 929 } 930 931 regs.cr = 0; 932 for (i = 0; i < 8; i++) { 933 regs.cr |= (env->crf[i] & 15) << (4 * (7 - i)); 934 } 935 936 ret = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s); 937 if (ret < 0) { 938 return ret; 939 } 940 941 kvm_put_fp(cs); 942 943 if (env->tlb_dirty) { 944 kvm_sw_tlb_put(cpu); 945 env->tlb_dirty = false; 946 } 947 948 if (cap_segstate && (level >= KVM_PUT_RESET_STATE)) { 949 ret = kvmppc_put_books_sregs(cpu); 950 if (ret < 0) { 951 return ret; 952 } 953 } 954 955 if (cap_hior && (level >= KVM_PUT_RESET_STATE)) { 956 kvm_put_one_spr(cs, KVM_REG_PPC_HIOR, SPR_HIOR); 957 } 958 959 if (cap_one_reg) { 960 int i; 961 962 /* 963 * We deliberately ignore errors here, for kernels which have 964 * the ONE_REG calls, but don't support the specific 965 * registers, there's a reasonable chance things will still 966 * work, at least until we try to migrate. 967 */ 968 for (i = 0; i < 1024; i++) { 969 uint64_t id = env->spr_cb[i].one_reg_id; 970 971 if (id != 0) { 972 kvm_put_one_spr(cs, id, i); 973 } 974 } 975 976 #ifdef TARGET_PPC64 977 if (FIELD_EX64(env->msr, MSR, TS)) { 978 for (i = 0; i < ARRAY_SIZE(env->tm_gpr); i++) { 979 kvm_set_one_reg(cs, KVM_REG_PPC_TM_GPR(i), &env->tm_gpr[i]); 980 } 981 for (i = 0; i < ARRAY_SIZE(env->tm_vsr); i++) { 982 kvm_set_one_reg(cs, KVM_REG_PPC_TM_VSR(i), &env->tm_vsr[i]); 983 } 984 kvm_set_one_reg(cs, KVM_REG_PPC_TM_CR, &env->tm_cr); 985 kvm_set_one_reg(cs, KVM_REG_PPC_TM_LR, &env->tm_lr); 986 kvm_set_one_reg(cs, KVM_REG_PPC_TM_CTR, &env->tm_ctr); 987 kvm_set_one_reg(cs, KVM_REG_PPC_TM_FPSCR, &env->tm_fpscr); 988 kvm_set_one_reg(cs, KVM_REG_PPC_TM_AMR, &env->tm_amr); 989 kvm_set_one_reg(cs, KVM_REG_PPC_TM_PPR, &env->tm_ppr); 990 kvm_set_one_reg(cs, KVM_REG_PPC_TM_VRSAVE, &env->tm_vrsave); 991 kvm_set_one_reg(cs, KVM_REG_PPC_TM_VSCR, &env->tm_vscr); 992 kvm_set_one_reg(cs, KVM_REG_PPC_TM_DSCR, &env->tm_dscr); 993 kvm_set_one_reg(cs, KVM_REG_PPC_TM_TAR, &env->tm_tar); 994 } 995 996 if (cap_papr) { 997 if (kvm_put_vpa(cs) < 0) { 998 trace_kvm_failed_put_vpa(); 999 } 1000 } 1001 1002 kvm_set_one_reg(cs, KVM_REG_PPC_TB_OFFSET, &env->tb_env->tb_offset); 1003 1004 if (level > KVM_PUT_RUNTIME_STATE) { 1005 kvm_put_one_spr(cs, KVM_REG_PPC_DPDES, SPR_DPDES); 1006 } 1007 #endif /* TARGET_PPC64 */ 1008 } 1009 1010 return ret; 1011 } 1012 1013 static void kvm_sync_excp(CPUPPCState *env, int vector, int ivor) 1014 { 1015 env->excp_vectors[vector] = env->spr[ivor] + env->spr[SPR_BOOKE_IVPR]; 1016 } 1017 1018 static int kvmppc_get_booke_sregs(PowerPCCPU *cpu) 1019 { 1020 CPUPPCState *env = &cpu->env; 1021 struct kvm_sregs sregs; 1022 int ret; 1023 1024 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS, &sregs); 1025 if (ret < 0) { 1026 return ret; 1027 } 1028 1029 if (sregs.u.e.features & KVM_SREGS_E_BASE) { 1030 env->spr[SPR_BOOKE_CSRR0] = sregs.u.e.csrr0; 1031 env->spr[SPR_BOOKE_CSRR1] = sregs.u.e.csrr1; 1032 env->spr[SPR_BOOKE_ESR] = sregs.u.e.esr; 1033 env->spr[SPR_BOOKE_DEAR] = sregs.u.e.dear; 1034 env->spr[SPR_BOOKE_MCSR] = sregs.u.e.mcsr; 1035 env->spr[SPR_BOOKE_TSR] = sregs.u.e.tsr; 1036 env->spr[SPR_BOOKE_TCR] = sregs.u.e.tcr; 1037 env->spr[SPR_DECR] = sregs.u.e.dec; 1038 env->spr[SPR_TBL] = sregs.u.e.tb & 0xffffffff; 1039 env->spr[SPR_TBU] = sregs.u.e.tb >> 32; 1040 env->spr[SPR_VRSAVE] = sregs.u.e.vrsave; 1041 } 1042 1043 if (sregs.u.e.features & KVM_SREGS_E_ARCH206) { 1044 env->spr[SPR_BOOKE_PIR] = sregs.u.e.pir; 1045 env->spr[SPR_BOOKE_MCSRR0] = sregs.u.e.mcsrr0; 1046 env->spr[SPR_BOOKE_MCSRR1] = sregs.u.e.mcsrr1; 1047 env->spr[SPR_BOOKE_DECAR] = sregs.u.e.decar; 1048 env->spr[SPR_BOOKE_IVPR] = sregs.u.e.ivpr; 1049 } 1050 1051 if (sregs.u.e.features & KVM_SREGS_E_64) { 1052 env->spr[SPR_BOOKE_EPCR] = sregs.u.e.epcr; 1053 } 1054 1055 if (sregs.u.e.features & KVM_SREGS_E_SPRG8) { 1056 env->spr[SPR_BOOKE_SPRG8] = sregs.u.e.sprg8; 1057 } 1058 1059 if (sregs.u.e.features & KVM_SREGS_E_IVOR) { 1060 env->spr[SPR_BOOKE_IVOR0] = sregs.u.e.ivor_low[0]; 1061 kvm_sync_excp(env, POWERPC_EXCP_CRITICAL, SPR_BOOKE_IVOR0); 1062 env->spr[SPR_BOOKE_IVOR1] = sregs.u.e.ivor_low[1]; 1063 kvm_sync_excp(env, POWERPC_EXCP_MCHECK, SPR_BOOKE_IVOR1); 1064 env->spr[SPR_BOOKE_IVOR2] = sregs.u.e.ivor_low[2]; 1065 kvm_sync_excp(env, POWERPC_EXCP_DSI, SPR_BOOKE_IVOR2); 1066 env->spr[SPR_BOOKE_IVOR3] = sregs.u.e.ivor_low[3]; 1067 kvm_sync_excp(env, POWERPC_EXCP_ISI, SPR_BOOKE_IVOR3); 1068 env->spr[SPR_BOOKE_IVOR4] = sregs.u.e.ivor_low[4]; 1069 kvm_sync_excp(env, POWERPC_EXCP_EXTERNAL, SPR_BOOKE_IVOR4); 1070 env->spr[SPR_BOOKE_IVOR5] = sregs.u.e.ivor_low[5]; 1071 kvm_sync_excp(env, POWERPC_EXCP_ALIGN, SPR_BOOKE_IVOR5); 1072 env->spr[SPR_BOOKE_IVOR6] = sregs.u.e.ivor_low[6]; 1073 kvm_sync_excp(env, POWERPC_EXCP_PROGRAM, SPR_BOOKE_IVOR6); 1074 env->spr[SPR_BOOKE_IVOR7] = sregs.u.e.ivor_low[7]; 1075 kvm_sync_excp(env, POWERPC_EXCP_FPU, SPR_BOOKE_IVOR7); 1076 env->spr[SPR_BOOKE_IVOR8] = sregs.u.e.ivor_low[8]; 1077 kvm_sync_excp(env, POWERPC_EXCP_SYSCALL, SPR_BOOKE_IVOR8); 1078 env->spr[SPR_BOOKE_IVOR9] = sregs.u.e.ivor_low[9]; 1079 kvm_sync_excp(env, POWERPC_EXCP_APU, SPR_BOOKE_IVOR9); 1080 env->spr[SPR_BOOKE_IVOR10] = sregs.u.e.ivor_low[10]; 1081 kvm_sync_excp(env, POWERPC_EXCP_DECR, SPR_BOOKE_IVOR10); 1082 env->spr[SPR_BOOKE_IVOR11] = sregs.u.e.ivor_low[11]; 1083 kvm_sync_excp(env, POWERPC_EXCP_FIT, SPR_BOOKE_IVOR11); 1084 env->spr[SPR_BOOKE_IVOR12] = sregs.u.e.ivor_low[12]; 1085 kvm_sync_excp(env, POWERPC_EXCP_WDT, SPR_BOOKE_IVOR12); 1086 env->spr[SPR_BOOKE_IVOR13] = sregs.u.e.ivor_low[13]; 1087 kvm_sync_excp(env, POWERPC_EXCP_DTLB, SPR_BOOKE_IVOR13); 1088 env->spr[SPR_BOOKE_IVOR14] = sregs.u.e.ivor_low[14]; 1089 kvm_sync_excp(env, POWERPC_EXCP_ITLB, SPR_BOOKE_IVOR14); 1090 env->spr[SPR_BOOKE_IVOR15] = sregs.u.e.ivor_low[15]; 1091 kvm_sync_excp(env, POWERPC_EXCP_DEBUG, SPR_BOOKE_IVOR15); 1092 1093 if (sregs.u.e.features & KVM_SREGS_E_SPE) { 1094 env->spr[SPR_BOOKE_IVOR32] = sregs.u.e.ivor_high[0]; 1095 kvm_sync_excp(env, POWERPC_EXCP_SPEU, SPR_BOOKE_IVOR32); 1096 env->spr[SPR_BOOKE_IVOR33] = sregs.u.e.ivor_high[1]; 1097 kvm_sync_excp(env, POWERPC_EXCP_EFPDI, SPR_BOOKE_IVOR33); 1098 env->spr[SPR_BOOKE_IVOR34] = sregs.u.e.ivor_high[2]; 1099 kvm_sync_excp(env, POWERPC_EXCP_EFPRI, SPR_BOOKE_IVOR34); 1100 } 1101 1102 if (sregs.u.e.features & KVM_SREGS_E_PM) { 1103 env->spr[SPR_BOOKE_IVOR35] = sregs.u.e.ivor_high[3]; 1104 kvm_sync_excp(env, POWERPC_EXCP_EPERFM, SPR_BOOKE_IVOR35); 1105 } 1106 1107 if (sregs.u.e.features & KVM_SREGS_E_PC) { 1108 env->spr[SPR_BOOKE_IVOR36] = sregs.u.e.ivor_high[4]; 1109 kvm_sync_excp(env, POWERPC_EXCP_DOORI, SPR_BOOKE_IVOR36); 1110 env->spr[SPR_BOOKE_IVOR37] = sregs.u.e.ivor_high[5]; 1111 kvm_sync_excp(env, POWERPC_EXCP_DOORCI, SPR_BOOKE_IVOR37); 1112 } 1113 } 1114 1115 if (sregs.u.e.features & KVM_SREGS_E_ARCH206_MMU) { 1116 env->spr[SPR_BOOKE_MAS0] = sregs.u.e.mas0; 1117 env->spr[SPR_BOOKE_MAS1] = sregs.u.e.mas1; 1118 env->spr[SPR_BOOKE_MAS2] = sregs.u.e.mas2; 1119 env->spr[SPR_BOOKE_MAS3] = sregs.u.e.mas7_3 & 0xffffffff; 1120 env->spr[SPR_BOOKE_MAS4] = sregs.u.e.mas4; 1121 env->spr[SPR_BOOKE_MAS6] = sregs.u.e.mas6; 1122 env->spr[SPR_BOOKE_MAS7] = sregs.u.e.mas7_3 >> 32; 1123 env->spr[SPR_MMUCFG] = sregs.u.e.mmucfg; 1124 env->spr[SPR_BOOKE_TLB0CFG] = sregs.u.e.tlbcfg[0]; 1125 env->spr[SPR_BOOKE_TLB1CFG] = sregs.u.e.tlbcfg[1]; 1126 } 1127 1128 if (sregs.u.e.features & KVM_SREGS_EXP) { 1129 env->spr[SPR_BOOKE_EPR] = sregs.u.e.epr; 1130 } 1131 1132 if (sregs.u.e.features & KVM_SREGS_E_PD) { 1133 env->spr[SPR_BOOKE_EPLC] = sregs.u.e.eplc; 1134 env->spr[SPR_BOOKE_EPSC] = sregs.u.e.epsc; 1135 } 1136 1137 if (sregs.u.e.impl_id == KVM_SREGS_E_IMPL_FSL) { 1138 env->spr[SPR_E500_SVR] = sregs.u.e.impl.fsl.svr; 1139 env->spr[SPR_Exxx_MCAR] = sregs.u.e.impl.fsl.mcar; 1140 env->spr[SPR_HID0] = sregs.u.e.impl.fsl.hid0; 1141 1142 if (sregs.u.e.impl.fsl.features & KVM_SREGS_E_FSL_PIDn) { 1143 env->spr[SPR_BOOKE_PID1] = sregs.u.e.impl.fsl.pid1; 1144 env->spr[SPR_BOOKE_PID2] = sregs.u.e.impl.fsl.pid2; 1145 } 1146 } 1147 1148 return 0; 1149 } 1150 1151 static int kvmppc_get_books_sregs(PowerPCCPU *cpu) 1152 { 1153 CPUPPCState *env = &cpu->env; 1154 struct kvm_sregs sregs; 1155 int ret; 1156 int i; 1157 1158 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS, &sregs); 1159 if (ret < 0) { 1160 return ret; 1161 } 1162 1163 if (!cpu->vhyp) { 1164 ppc_store_sdr1(env, sregs.u.s.sdr1); 1165 } 1166 1167 /* Sync SLB */ 1168 #ifdef TARGET_PPC64 1169 /* 1170 * The packed SLB array we get from KVM_GET_SREGS only contains 1171 * information about valid entries. So we flush our internal copy 1172 * to get rid of stale ones, then put all valid SLB entries back 1173 * in. 1174 */ 1175 memset(env->slb, 0, sizeof(env->slb)); 1176 for (i = 0; i < ARRAY_SIZE(env->slb); i++) { 1177 target_ulong rb = sregs.u.s.ppc64.slb[i].slbe; 1178 target_ulong rs = sregs.u.s.ppc64.slb[i].slbv; 1179 /* 1180 * Only restore valid entries 1181 */ 1182 if (rb & SLB_ESID_V) { 1183 ppc_store_slb(cpu, rb & 0xfff, rb & ~0xfffULL, rs); 1184 } 1185 } 1186 #endif 1187 1188 /* Sync SRs */ 1189 for (i = 0; i < 16; i++) { 1190 env->sr[i] = sregs.u.s.ppc32.sr[i]; 1191 } 1192 1193 /* Sync BATs */ 1194 for (i = 0; i < 8; i++) { 1195 env->DBAT[0][i] = sregs.u.s.ppc32.dbat[i] & 0xffffffff; 1196 env->DBAT[1][i] = sregs.u.s.ppc32.dbat[i] >> 32; 1197 env->IBAT[0][i] = sregs.u.s.ppc32.ibat[i] & 0xffffffff; 1198 env->IBAT[1][i] = sregs.u.s.ppc32.ibat[i] >> 32; 1199 } 1200 1201 return 0; 1202 } 1203 1204 int kvm_arch_get_registers(CPUState *cs) 1205 { 1206 PowerPCCPU *cpu = POWERPC_CPU(cs); 1207 CPUPPCState *env = &cpu->env; 1208 struct kvm_regs regs; 1209 uint32_t cr; 1210 int i, ret; 1211 1212 ret = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s); 1213 if (ret < 0) { 1214 return ret; 1215 } 1216 1217 cr = regs.cr; 1218 for (i = 7; i >= 0; i--) { 1219 env->crf[i] = cr & 15; 1220 cr >>= 4; 1221 } 1222 1223 env->ctr = regs.ctr; 1224 env->lr = regs.lr; 1225 cpu_write_xer(env, regs.xer); 1226 env->msr = regs.msr; 1227 env->nip = regs.pc; 1228 1229 env->spr[SPR_SRR0] = regs.srr0; 1230 env->spr[SPR_SRR1] = regs.srr1; 1231 1232 env->spr[SPR_SPRG0] = regs.sprg0; 1233 env->spr[SPR_SPRG1] = regs.sprg1; 1234 env->spr[SPR_SPRG2] = regs.sprg2; 1235 env->spr[SPR_SPRG3] = regs.sprg3; 1236 env->spr[SPR_SPRG4] = regs.sprg4; 1237 env->spr[SPR_SPRG5] = regs.sprg5; 1238 env->spr[SPR_SPRG6] = regs.sprg6; 1239 env->spr[SPR_SPRG7] = regs.sprg7; 1240 1241 env->spr[SPR_BOOKE_PID] = regs.pid; 1242 1243 for (i = 0; i < 32; i++) { 1244 env->gpr[i] = regs.gpr[i]; 1245 } 1246 1247 kvm_get_fp(cs); 1248 1249 if (cap_booke_sregs) { 1250 ret = kvmppc_get_booke_sregs(cpu); 1251 if (ret < 0) { 1252 return ret; 1253 } 1254 } 1255 1256 if (cap_segstate) { 1257 ret = kvmppc_get_books_sregs(cpu); 1258 if (ret < 0) { 1259 return ret; 1260 } 1261 } 1262 1263 if (cap_hior) { 1264 kvm_get_one_spr(cs, KVM_REG_PPC_HIOR, SPR_HIOR); 1265 } 1266 1267 if (cap_one_reg) { 1268 int i; 1269 1270 /* 1271 * We deliberately ignore errors here, for kernels which have 1272 * the ONE_REG calls, but don't support the specific 1273 * registers, there's a reasonable chance things will still 1274 * work, at least until we try to migrate. 1275 */ 1276 for (i = 0; i < 1024; i++) { 1277 uint64_t id = env->spr_cb[i].one_reg_id; 1278 1279 if (id != 0) { 1280 kvm_get_one_spr(cs, id, i); 1281 } 1282 } 1283 1284 #ifdef TARGET_PPC64 1285 if (FIELD_EX64(env->msr, MSR, TS)) { 1286 for (i = 0; i < ARRAY_SIZE(env->tm_gpr); i++) { 1287 kvm_get_one_reg(cs, KVM_REG_PPC_TM_GPR(i), &env->tm_gpr[i]); 1288 } 1289 for (i = 0; i < ARRAY_SIZE(env->tm_vsr); i++) { 1290 kvm_get_one_reg(cs, KVM_REG_PPC_TM_VSR(i), &env->tm_vsr[i]); 1291 } 1292 kvm_get_one_reg(cs, KVM_REG_PPC_TM_CR, &env->tm_cr); 1293 kvm_get_one_reg(cs, KVM_REG_PPC_TM_LR, &env->tm_lr); 1294 kvm_get_one_reg(cs, KVM_REG_PPC_TM_CTR, &env->tm_ctr); 1295 kvm_get_one_reg(cs, KVM_REG_PPC_TM_FPSCR, &env->tm_fpscr); 1296 kvm_get_one_reg(cs, KVM_REG_PPC_TM_AMR, &env->tm_amr); 1297 kvm_get_one_reg(cs, KVM_REG_PPC_TM_PPR, &env->tm_ppr); 1298 kvm_get_one_reg(cs, KVM_REG_PPC_TM_VRSAVE, &env->tm_vrsave); 1299 kvm_get_one_reg(cs, KVM_REG_PPC_TM_VSCR, &env->tm_vscr); 1300 kvm_get_one_reg(cs, KVM_REG_PPC_TM_DSCR, &env->tm_dscr); 1301 kvm_get_one_reg(cs, KVM_REG_PPC_TM_TAR, &env->tm_tar); 1302 } 1303 1304 if (cap_papr) { 1305 if (kvm_get_vpa(cs) < 0) { 1306 trace_kvm_failed_get_vpa(); 1307 } 1308 } 1309 1310 kvm_get_one_reg(cs, KVM_REG_PPC_TB_OFFSET, &env->tb_env->tb_offset); 1311 kvm_get_one_spr(cs, KVM_REG_PPC_DPDES, SPR_DPDES); 1312 #endif 1313 } 1314 1315 return 0; 1316 } 1317 1318 int kvmppc_set_interrupt(PowerPCCPU *cpu, int irq, int level) 1319 { 1320 unsigned virq = level ? KVM_INTERRUPT_SET_LEVEL : KVM_INTERRUPT_UNSET; 1321 1322 if (irq != PPC_INTERRUPT_EXT) { 1323 return 0; 1324 } 1325 1326 if (!kvm_enabled() || !cap_interrupt_unset) { 1327 return 0; 1328 } 1329 1330 kvm_vcpu_ioctl(CPU(cpu), KVM_INTERRUPT, &virq); 1331 1332 return 0; 1333 } 1334 1335 void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run) 1336 { 1337 return; 1338 } 1339 1340 MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run) 1341 { 1342 return MEMTXATTRS_UNSPECIFIED; 1343 } 1344 1345 int kvm_arch_process_async_events(CPUState *cs) 1346 { 1347 return cs->halted; 1348 } 1349 1350 static int kvmppc_handle_halt(PowerPCCPU *cpu) 1351 { 1352 CPUState *cs = CPU(cpu); 1353 CPUPPCState *env = &cpu->env; 1354 1355 if (!(cs->interrupt_request & CPU_INTERRUPT_HARD) && 1356 FIELD_EX64(env->msr, MSR, EE)) { 1357 cs->halted = 1; 1358 cs->exception_index = EXCP_HLT; 1359 } 1360 1361 return 0; 1362 } 1363 1364 /* map dcr access to existing qemu dcr emulation */ 1365 static int kvmppc_handle_dcr_read(CPUPPCState *env, 1366 uint32_t dcrn, uint32_t *data) 1367 { 1368 if (ppc_dcr_read(env->dcr_env, dcrn, data) < 0) { 1369 fprintf(stderr, "Read to unhandled DCR (0x%x)\n", dcrn); 1370 } 1371 1372 return 0; 1373 } 1374 1375 static int kvmppc_handle_dcr_write(CPUPPCState *env, 1376 uint32_t dcrn, uint32_t data) 1377 { 1378 if (ppc_dcr_write(env->dcr_env, dcrn, data) < 0) { 1379 fprintf(stderr, "Write to unhandled DCR (0x%x)\n", dcrn); 1380 } 1381 1382 return 0; 1383 } 1384 1385 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 1386 { 1387 /* Mixed endian case is not handled */ 1388 uint32_t sc = debug_inst_opcode; 1389 1390 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1391 sizeof(sc), 0) || 1392 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&sc, sizeof(sc), 1)) { 1393 return -EINVAL; 1394 } 1395 1396 return 0; 1397 } 1398 1399 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 1400 { 1401 uint32_t sc; 1402 1403 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&sc, sizeof(sc), 0) || 1404 sc != debug_inst_opcode || 1405 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1406 sizeof(sc), 1)) { 1407 return -EINVAL; 1408 } 1409 1410 return 0; 1411 } 1412 1413 static int find_hw_breakpoint(target_ulong addr, int type) 1414 { 1415 int n; 1416 1417 assert((nb_hw_breakpoint + nb_hw_watchpoint) 1418 <= ARRAY_SIZE(hw_debug_points)); 1419 1420 for (n = 0; n < nb_hw_breakpoint + nb_hw_watchpoint; n++) { 1421 if (hw_debug_points[n].addr == addr && 1422 hw_debug_points[n].type == type) { 1423 return n; 1424 } 1425 } 1426 1427 return -1; 1428 } 1429 1430 static int find_hw_watchpoint(target_ulong addr, int *flag) 1431 { 1432 int n; 1433 1434 n = find_hw_breakpoint(addr, GDB_WATCHPOINT_ACCESS); 1435 if (n >= 0) { 1436 *flag = BP_MEM_ACCESS; 1437 return n; 1438 } 1439 1440 n = find_hw_breakpoint(addr, GDB_WATCHPOINT_WRITE); 1441 if (n >= 0) { 1442 *flag = BP_MEM_WRITE; 1443 return n; 1444 } 1445 1446 n = find_hw_breakpoint(addr, GDB_WATCHPOINT_READ); 1447 if (n >= 0) { 1448 *flag = BP_MEM_READ; 1449 return n; 1450 } 1451 1452 return -1; 1453 } 1454 1455 int kvm_arch_insert_hw_breakpoint(target_ulong addr, 1456 target_ulong len, int type) 1457 { 1458 if ((nb_hw_breakpoint + nb_hw_watchpoint) >= ARRAY_SIZE(hw_debug_points)) { 1459 return -ENOBUFS; 1460 } 1461 1462 hw_debug_points[nb_hw_breakpoint + nb_hw_watchpoint].addr = addr; 1463 hw_debug_points[nb_hw_breakpoint + nb_hw_watchpoint].type = type; 1464 1465 switch (type) { 1466 case GDB_BREAKPOINT_HW: 1467 if (nb_hw_breakpoint >= max_hw_breakpoint) { 1468 return -ENOBUFS; 1469 } 1470 1471 if (find_hw_breakpoint(addr, type) >= 0) { 1472 return -EEXIST; 1473 } 1474 1475 nb_hw_breakpoint++; 1476 break; 1477 1478 case GDB_WATCHPOINT_WRITE: 1479 case GDB_WATCHPOINT_READ: 1480 case GDB_WATCHPOINT_ACCESS: 1481 if (nb_hw_watchpoint >= max_hw_watchpoint) { 1482 return -ENOBUFS; 1483 } 1484 1485 if (find_hw_breakpoint(addr, type) >= 0) { 1486 return -EEXIST; 1487 } 1488 1489 nb_hw_watchpoint++; 1490 break; 1491 1492 default: 1493 return -ENOSYS; 1494 } 1495 1496 return 0; 1497 } 1498 1499 int kvm_arch_remove_hw_breakpoint(target_ulong addr, 1500 target_ulong len, int type) 1501 { 1502 int n; 1503 1504 n = find_hw_breakpoint(addr, type); 1505 if (n < 0) { 1506 return -ENOENT; 1507 } 1508 1509 switch (type) { 1510 case GDB_BREAKPOINT_HW: 1511 nb_hw_breakpoint--; 1512 break; 1513 1514 case GDB_WATCHPOINT_WRITE: 1515 case GDB_WATCHPOINT_READ: 1516 case GDB_WATCHPOINT_ACCESS: 1517 nb_hw_watchpoint--; 1518 break; 1519 1520 default: 1521 return -ENOSYS; 1522 } 1523 hw_debug_points[n] = hw_debug_points[nb_hw_breakpoint + nb_hw_watchpoint]; 1524 1525 return 0; 1526 } 1527 1528 void kvm_arch_remove_all_hw_breakpoints(void) 1529 { 1530 nb_hw_breakpoint = nb_hw_watchpoint = 0; 1531 } 1532 1533 void kvm_arch_update_guest_debug(CPUState *cs, struct kvm_guest_debug *dbg) 1534 { 1535 int n; 1536 1537 /* Software Breakpoint updates */ 1538 if (kvm_sw_breakpoints_active(cs)) { 1539 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; 1540 } 1541 1542 assert((nb_hw_breakpoint + nb_hw_watchpoint) 1543 <= ARRAY_SIZE(hw_debug_points)); 1544 assert((nb_hw_breakpoint + nb_hw_watchpoint) <= ARRAY_SIZE(dbg->arch.bp)); 1545 1546 if (nb_hw_breakpoint + nb_hw_watchpoint > 0) { 1547 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; 1548 memset(dbg->arch.bp, 0, sizeof(dbg->arch.bp)); 1549 for (n = 0; n < nb_hw_breakpoint + nb_hw_watchpoint; n++) { 1550 switch (hw_debug_points[n].type) { 1551 case GDB_BREAKPOINT_HW: 1552 dbg->arch.bp[n].type = KVMPPC_DEBUG_BREAKPOINT; 1553 break; 1554 case GDB_WATCHPOINT_WRITE: 1555 dbg->arch.bp[n].type = KVMPPC_DEBUG_WATCH_WRITE; 1556 break; 1557 case GDB_WATCHPOINT_READ: 1558 dbg->arch.bp[n].type = KVMPPC_DEBUG_WATCH_READ; 1559 break; 1560 case GDB_WATCHPOINT_ACCESS: 1561 dbg->arch.bp[n].type = KVMPPC_DEBUG_WATCH_WRITE | 1562 KVMPPC_DEBUG_WATCH_READ; 1563 break; 1564 default: 1565 cpu_abort(cs, "Unsupported breakpoint type\n"); 1566 } 1567 dbg->arch.bp[n].addr = hw_debug_points[n].addr; 1568 } 1569 } 1570 } 1571 1572 static int kvm_handle_hw_breakpoint(CPUState *cs, 1573 struct kvm_debug_exit_arch *arch_info) 1574 { 1575 int handle = DEBUG_RETURN_GUEST; 1576 int n; 1577 int flag = 0; 1578 1579 if (nb_hw_breakpoint + nb_hw_watchpoint > 0) { 1580 if (arch_info->status & KVMPPC_DEBUG_BREAKPOINT) { 1581 n = find_hw_breakpoint(arch_info->address, GDB_BREAKPOINT_HW); 1582 if (n >= 0) { 1583 handle = DEBUG_RETURN_GDB; 1584 } 1585 } else if (arch_info->status & (KVMPPC_DEBUG_WATCH_READ | 1586 KVMPPC_DEBUG_WATCH_WRITE)) { 1587 n = find_hw_watchpoint(arch_info->address, &flag); 1588 if (n >= 0) { 1589 handle = DEBUG_RETURN_GDB; 1590 cs->watchpoint_hit = &hw_watchpoint; 1591 hw_watchpoint.vaddr = hw_debug_points[n].addr; 1592 hw_watchpoint.flags = flag; 1593 } 1594 } 1595 } 1596 return handle; 1597 } 1598 1599 static int kvm_handle_singlestep(void) 1600 { 1601 return DEBUG_RETURN_GDB; 1602 } 1603 1604 static int kvm_handle_sw_breakpoint(void) 1605 { 1606 return DEBUG_RETURN_GDB; 1607 } 1608 1609 static int kvm_handle_debug(PowerPCCPU *cpu, struct kvm_run *run) 1610 { 1611 CPUState *cs = CPU(cpu); 1612 CPUPPCState *env = &cpu->env; 1613 struct kvm_debug_exit_arch *arch_info = &run->debug.arch; 1614 1615 if (cs->singlestep_enabled) { 1616 return kvm_handle_singlestep(); 1617 } 1618 1619 if (arch_info->status) { 1620 return kvm_handle_hw_breakpoint(cs, arch_info); 1621 } 1622 1623 if (kvm_find_sw_breakpoint(cs, arch_info->address)) { 1624 return kvm_handle_sw_breakpoint(); 1625 } 1626 1627 /* 1628 * QEMU is not able to handle debug exception, so inject 1629 * program exception to guest; 1630 * Yes program exception NOT debug exception !! 1631 * When QEMU is using debug resources then debug exception must 1632 * be always set. To achieve this we set MSR_DE and also set 1633 * MSRP_DEP so guest cannot change MSR_DE. 1634 * When emulating debug resource for guest we want guest 1635 * to control MSR_DE (enable/disable debug interrupt on need). 1636 * Supporting both configurations are NOT possible. 1637 * So the result is that we cannot share debug resources 1638 * between QEMU and Guest on BOOKE architecture. 1639 * In the current design QEMU gets the priority over guest, 1640 * this means that if QEMU is using debug resources then guest 1641 * cannot use them; 1642 * For software breakpoint QEMU uses a privileged instruction; 1643 * So there cannot be any reason that we are here for guest 1644 * set debug exception, only possibility is guest executed a 1645 * privileged / illegal instruction and that's why we are 1646 * injecting a program interrupt. 1647 */ 1648 cpu_synchronize_state(cs); 1649 /* 1650 * env->nip is PC, so increment this by 4 to use 1651 * ppc_cpu_do_interrupt(), which set srr0 = env->nip - 4. 1652 */ 1653 env->nip += 4; 1654 cs->exception_index = POWERPC_EXCP_PROGRAM; 1655 env->error_code = POWERPC_EXCP_INVAL; 1656 ppc_cpu_do_interrupt(cs); 1657 1658 return DEBUG_RETURN_GUEST; 1659 } 1660 1661 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) 1662 { 1663 PowerPCCPU *cpu = POWERPC_CPU(cs); 1664 CPUPPCState *env = &cpu->env; 1665 int ret; 1666 1667 qemu_mutex_lock_iothread(); 1668 1669 switch (run->exit_reason) { 1670 case KVM_EXIT_DCR: 1671 if (run->dcr.is_write) { 1672 trace_kvm_handle_dcr_write(); 1673 ret = kvmppc_handle_dcr_write(env, run->dcr.dcrn, run->dcr.data); 1674 } else { 1675 trace_kvm_handle_dcr_read(); 1676 ret = kvmppc_handle_dcr_read(env, run->dcr.dcrn, &run->dcr.data); 1677 } 1678 break; 1679 case KVM_EXIT_HLT: 1680 trace_kvm_handle_halt(); 1681 ret = kvmppc_handle_halt(cpu); 1682 break; 1683 #if defined(TARGET_PPC64) 1684 case KVM_EXIT_PAPR_HCALL: 1685 trace_kvm_handle_papr_hcall(run->papr_hcall.nr); 1686 run->papr_hcall.ret = spapr_hypercall(cpu, 1687 run->papr_hcall.nr, 1688 run->papr_hcall.args); 1689 ret = 0; 1690 break; 1691 #endif 1692 case KVM_EXIT_EPR: 1693 trace_kvm_handle_epr(); 1694 run->epr.epr = ldl_phys(cs->as, env->mpic_iack); 1695 ret = 0; 1696 break; 1697 case KVM_EXIT_WATCHDOG: 1698 trace_kvm_handle_watchdog_expiry(); 1699 watchdog_perform_action(); 1700 ret = 0; 1701 break; 1702 1703 case KVM_EXIT_DEBUG: 1704 trace_kvm_handle_debug_exception(); 1705 if (kvm_handle_debug(cpu, run)) { 1706 ret = EXCP_DEBUG; 1707 break; 1708 } 1709 /* re-enter, this exception was guest-internal */ 1710 ret = 0; 1711 break; 1712 1713 #if defined(TARGET_PPC64) 1714 case KVM_EXIT_NMI: 1715 trace_kvm_handle_nmi_exception(); 1716 ret = kvm_handle_nmi(cpu, run); 1717 break; 1718 #endif 1719 1720 default: 1721 fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); 1722 ret = -1; 1723 break; 1724 } 1725 1726 qemu_mutex_unlock_iothread(); 1727 return ret; 1728 } 1729 1730 int kvmppc_or_tsr_bits(PowerPCCPU *cpu, uint32_t tsr_bits) 1731 { 1732 CPUState *cs = CPU(cpu); 1733 uint32_t bits = tsr_bits; 1734 struct kvm_one_reg reg = { 1735 .id = KVM_REG_PPC_OR_TSR, 1736 .addr = (uintptr_t) &bits, 1737 }; 1738 1739 return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 1740 } 1741 1742 int kvmppc_clear_tsr_bits(PowerPCCPU *cpu, uint32_t tsr_bits) 1743 { 1744 1745 CPUState *cs = CPU(cpu); 1746 uint32_t bits = tsr_bits; 1747 struct kvm_one_reg reg = { 1748 .id = KVM_REG_PPC_CLEAR_TSR, 1749 .addr = (uintptr_t) &bits, 1750 }; 1751 1752 return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 1753 } 1754 1755 int kvmppc_set_tcr(PowerPCCPU *cpu) 1756 { 1757 CPUState *cs = CPU(cpu); 1758 CPUPPCState *env = &cpu->env; 1759 uint32_t tcr = env->spr[SPR_BOOKE_TCR]; 1760 1761 struct kvm_one_reg reg = { 1762 .id = KVM_REG_PPC_TCR, 1763 .addr = (uintptr_t) &tcr, 1764 }; 1765 1766 return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 1767 } 1768 1769 int kvmppc_booke_watchdog_enable(PowerPCCPU *cpu) 1770 { 1771 CPUState *cs = CPU(cpu); 1772 int ret; 1773 1774 if (!kvm_enabled()) { 1775 return -1; 1776 } 1777 1778 if (!cap_ppc_watchdog) { 1779 printf("warning: KVM does not support watchdog"); 1780 return -1; 1781 } 1782 1783 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_PPC_BOOKE_WATCHDOG, 0); 1784 if (ret < 0) { 1785 fprintf(stderr, "%s: couldn't enable KVM_CAP_PPC_BOOKE_WATCHDOG: %s\n", 1786 __func__, strerror(-ret)); 1787 return ret; 1788 } 1789 1790 return ret; 1791 } 1792 1793 static int read_cpuinfo(const char *field, char *value, int len) 1794 { 1795 FILE *f; 1796 int ret = -1; 1797 int field_len = strlen(field); 1798 char line[512]; 1799 1800 f = fopen("/proc/cpuinfo", "r"); 1801 if (!f) { 1802 return -1; 1803 } 1804 1805 do { 1806 if (!fgets(line, sizeof(line), f)) { 1807 break; 1808 } 1809 if (!strncmp(line, field, field_len)) { 1810 pstrcpy(value, len, line); 1811 ret = 0; 1812 break; 1813 } 1814 } while (*line); 1815 1816 fclose(f); 1817 1818 return ret; 1819 } 1820 1821 static uint32_t kvmppc_get_tbfreq_procfs(void) 1822 { 1823 char line[512]; 1824 char *ns; 1825 uint32_t tbfreq_fallback = NANOSECONDS_PER_SECOND; 1826 uint32_t tbfreq_procfs; 1827 1828 if (read_cpuinfo("timebase", line, sizeof(line))) { 1829 return tbfreq_fallback; 1830 } 1831 1832 ns = strchr(line, ':'); 1833 if (!ns) { 1834 return tbfreq_fallback; 1835 } 1836 1837 tbfreq_procfs = atoi(++ns); 1838 1839 /* 0 is certainly not acceptable by the guest, return fallback value */ 1840 return tbfreq_procfs ? tbfreq_procfs : tbfreq_fallback; 1841 } 1842 1843 uint32_t kvmppc_get_tbfreq(void) 1844 { 1845 static uint32_t cached_tbfreq; 1846 1847 if (!cached_tbfreq) { 1848 cached_tbfreq = kvmppc_get_tbfreq_procfs(); 1849 } 1850 1851 return cached_tbfreq; 1852 } 1853 1854 bool kvmppc_get_host_serial(char **value) 1855 { 1856 return g_file_get_contents("/proc/device-tree/system-id", value, NULL, 1857 NULL); 1858 } 1859 1860 bool kvmppc_get_host_model(char **value) 1861 { 1862 return g_file_get_contents("/proc/device-tree/model", value, NULL, NULL); 1863 } 1864 1865 /* Try to find a device tree node for a CPU with clock-frequency property */ 1866 static int kvmppc_find_cpu_dt(char *buf, int buf_len) 1867 { 1868 struct dirent *dirp; 1869 DIR *dp; 1870 1871 dp = opendir(PROC_DEVTREE_CPU); 1872 if (!dp) { 1873 printf("Can't open directory " PROC_DEVTREE_CPU "\n"); 1874 return -1; 1875 } 1876 1877 buf[0] = '\0'; 1878 while ((dirp = readdir(dp)) != NULL) { 1879 FILE *f; 1880 snprintf(buf, buf_len, "%s%s/clock-frequency", PROC_DEVTREE_CPU, 1881 dirp->d_name); 1882 f = fopen(buf, "r"); 1883 if (f) { 1884 snprintf(buf, buf_len, "%s%s", PROC_DEVTREE_CPU, dirp->d_name); 1885 fclose(f); 1886 break; 1887 } 1888 buf[0] = '\0'; 1889 } 1890 closedir(dp); 1891 if (buf[0] == '\0') { 1892 printf("Unknown host!\n"); 1893 return -1; 1894 } 1895 1896 return 0; 1897 } 1898 1899 static uint64_t kvmppc_read_int_dt(const char *filename) 1900 { 1901 union { 1902 uint32_t v32; 1903 uint64_t v64; 1904 } u; 1905 FILE *f; 1906 int len; 1907 1908 f = fopen(filename, "rb"); 1909 if (!f) { 1910 return -1; 1911 } 1912 1913 len = fread(&u, 1, sizeof(u), f); 1914 fclose(f); 1915 switch (len) { 1916 case 4: 1917 /* property is a 32-bit quantity */ 1918 return be32_to_cpu(u.v32); 1919 case 8: 1920 return be64_to_cpu(u.v64); 1921 } 1922 1923 return 0; 1924 } 1925 1926 /* 1927 * Read a CPU node property from the host device tree that's a single 1928 * integer (32-bit or 64-bit). Returns 0 if anything goes wrong 1929 * (can't find or open the property, or doesn't understand the format) 1930 */ 1931 static uint64_t kvmppc_read_int_cpu_dt(const char *propname) 1932 { 1933 char buf[PATH_MAX], *tmp; 1934 uint64_t val; 1935 1936 if (kvmppc_find_cpu_dt(buf, sizeof(buf))) { 1937 return -1; 1938 } 1939 1940 tmp = g_strdup_printf("%s/%s", buf, propname); 1941 val = kvmppc_read_int_dt(tmp); 1942 g_free(tmp); 1943 1944 return val; 1945 } 1946 1947 uint64_t kvmppc_get_clockfreq(void) 1948 { 1949 return kvmppc_read_int_cpu_dt("clock-frequency"); 1950 } 1951 1952 static int kvmppc_get_dec_bits(void) 1953 { 1954 int nr_bits = kvmppc_read_int_cpu_dt("ibm,dec-bits"); 1955 1956 if (nr_bits > 0) { 1957 return nr_bits; 1958 } 1959 return 0; 1960 } 1961 1962 static int kvmppc_get_pvinfo(CPUPPCState *env, struct kvm_ppc_pvinfo *pvinfo) 1963 { 1964 CPUState *cs = env_cpu(env); 1965 1966 if (kvm_vm_check_extension(cs->kvm_state, KVM_CAP_PPC_GET_PVINFO) && 1967 !kvm_vm_ioctl(cs->kvm_state, KVM_PPC_GET_PVINFO, pvinfo)) { 1968 return 0; 1969 } 1970 1971 return 1; 1972 } 1973 1974 int kvmppc_get_hasidle(CPUPPCState *env) 1975 { 1976 struct kvm_ppc_pvinfo pvinfo; 1977 1978 if (!kvmppc_get_pvinfo(env, &pvinfo) && 1979 (pvinfo.flags & KVM_PPC_PVINFO_FLAGS_EV_IDLE)) { 1980 return 1; 1981 } 1982 1983 return 0; 1984 } 1985 1986 int kvmppc_get_hypercall(CPUPPCState *env, uint8_t *buf, int buf_len) 1987 { 1988 uint32_t *hc = (uint32_t *)buf; 1989 struct kvm_ppc_pvinfo pvinfo; 1990 1991 if (!kvmppc_get_pvinfo(env, &pvinfo)) { 1992 memcpy(buf, pvinfo.hcall, buf_len); 1993 return 0; 1994 } 1995 1996 /* 1997 * Fallback to always fail hypercalls regardless of endianness: 1998 * 1999 * tdi 0,r0,72 (becomes b .+8 in wrong endian, nop in good endian) 2000 * li r3, -1 2001 * b .+8 (becomes nop in wrong endian) 2002 * bswap32(li r3, -1) 2003 */ 2004 2005 hc[0] = cpu_to_be32(0x08000048); 2006 hc[1] = cpu_to_be32(0x3860ffff); 2007 hc[2] = cpu_to_be32(0x48000008); 2008 hc[3] = cpu_to_be32(bswap32(0x3860ffff)); 2009 2010 return 1; 2011 } 2012 2013 static inline int kvmppc_enable_hcall(KVMState *s, target_ulong hcall) 2014 { 2015 return kvm_vm_enable_cap(s, KVM_CAP_PPC_ENABLE_HCALL, 0, hcall, 1); 2016 } 2017 2018 void kvmppc_enable_logical_ci_hcalls(void) 2019 { 2020 /* 2021 * FIXME: it would be nice if we could detect the cases where 2022 * we're using a device which requires the in kernel 2023 * implementation of these hcalls, but the kernel lacks them and 2024 * produce a warning. 2025 */ 2026 kvmppc_enable_hcall(kvm_state, H_LOGICAL_CI_LOAD); 2027 kvmppc_enable_hcall(kvm_state, H_LOGICAL_CI_STORE); 2028 } 2029 2030 void kvmppc_enable_set_mode_hcall(void) 2031 { 2032 kvmppc_enable_hcall(kvm_state, H_SET_MODE); 2033 } 2034 2035 void kvmppc_enable_clear_ref_mod_hcalls(void) 2036 { 2037 kvmppc_enable_hcall(kvm_state, H_CLEAR_REF); 2038 kvmppc_enable_hcall(kvm_state, H_CLEAR_MOD); 2039 } 2040 2041 void kvmppc_enable_h_page_init(void) 2042 { 2043 kvmppc_enable_hcall(kvm_state, H_PAGE_INIT); 2044 } 2045 2046 void kvmppc_enable_h_rpt_invalidate(void) 2047 { 2048 kvmppc_enable_hcall(kvm_state, H_RPT_INVALIDATE); 2049 } 2050 2051 void kvmppc_set_papr(PowerPCCPU *cpu) 2052 { 2053 CPUState *cs = CPU(cpu); 2054 int ret; 2055 2056 if (!kvm_enabled()) { 2057 return; 2058 } 2059 2060 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_PPC_PAPR, 0); 2061 if (ret) { 2062 error_report("This vCPU type or KVM version does not support PAPR"); 2063 exit(1); 2064 } 2065 2066 /* 2067 * Update the capability flag so we sync the right information 2068 * with kvm 2069 */ 2070 cap_papr = 1; 2071 } 2072 2073 int kvmppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr) 2074 { 2075 return kvm_set_one_reg(CPU(cpu), KVM_REG_PPC_ARCH_COMPAT, &compat_pvr); 2076 } 2077 2078 void kvmppc_set_mpic_proxy(PowerPCCPU *cpu, int mpic_proxy) 2079 { 2080 CPUState *cs = CPU(cpu); 2081 int ret; 2082 2083 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_PPC_EPR, 0, mpic_proxy); 2084 if (ret && mpic_proxy) { 2085 error_report("This KVM version does not support EPR"); 2086 exit(1); 2087 } 2088 } 2089 2090 bool kvmppc_get_fwnmi(void) 2091 { 2092 return cap_fwnmi; 2093 } 2094 2095 int kvmppc_set_fwnmi(PowerPCCPU *cpu) 2096 { 2097 CPUState *cs = CPU(cpu); 2098 2099 return kvm_vcpu_enable_cap(cs, KVM_CAP_PPC_FWNMI, 0); 2100 } 2101 2102 int kvmppc_smt_threads(void) 2103 { 2104 return cap_ppc_smt ? cap_ppc_smt : 1; 2105 } 2106 2107 int kvmppc_set_smt_threads(int smt) 2108 { 2109 int ret; 2110 2111 ret = kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_SMT, 0, smt, 0); 2112 if (!ret) { 2113 cap_ppc_smt = smt; 2114 } 2115 return ret; 2116 } 2117 2118 void kvmppc_error_append_smt_possible_hint(Error *const *errp) 2119 { 2120 int i; 2121 GString *g; 2122 char *s; 2123 2124 assert(kvm_enabled()); 2125 if (cap_ppc_smt_possible) { 2126 g = g_string_new("Available VSMT modes:"); 2127 for (i = 63; i >= 0; i--) { 2128 if ((1UL << i) & cap_ppc_smt_possible) { 2129 g_string_append_printf(g, " %lu", (1UL << i)); 2130 } 2131 } 2132 s = g_string_free(g, false); 2133 error_append_hint(errp, "%s.\n", s); 2134 g_free(s); 2135 } else { 2136 error_append_hint(errp, 2137 "This KVM seems to be too old to support VSMT.\n"); 2138 } 2139 } 2140 2141 2142 #ifdef TARGET_PPC64 2143 uint64_t kvmppc_vrma_limit(unsigned int hash_shift) 2144 { 2145 struct kvm_ppc_smmu_info info; 2146 long rampagesize, best_page_shift; 2147 int i; 2148 2149 /* 2150 * Find the largest hardware supported page size that's less than 2151 * or equal to the (logical) backing page size of guest RAM 2152 */ 2153 kvm_get_smmu_info(&info, &error_fatal); 2154 rampagesize = qemu_minrampagesize(); 2155 best_page_shift = 0; 2156 2157 for (i = 0; i < KVM_PPC_PAGE_SIZES_MAX_SZ; i++) { 2158 struct kvm_ppc_one_seg_page_size *sps = &info.sps[i]; 2159 2160 if (!sps->page_shift) { 2161 continue; 2162 } 2163 2164 if ((sps->page_shift > best_page_shift) 2165 && ((1UL << sps->page_shift) <= rampagesize)) { 2166 best_page_shift = sps->page_shift; 2167 } 2168 } 2169 2170 return 1ULL << (best_page_shift + hash_shift - 7); 2171 } 2172 #endif 2173 2174 bool kvmppc_spapr_use_multitce(void) 2175 { 2176 return cap_spapr_multitce; 2177 } 2178 2179 int kvmppc_spapr_enable_inkernel_multitce(void) 2180 { 2181 int ret; 2182 2183 ret = kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_ENABLE_HCALL, 0, 2184 H_PUT_TCE_INDIRECT, 1); 2185 if (!ret) { 2186 ret = kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_ENABLE_HCALL, 0, 2187 H_STUFF_TCE, 1); 2188 } 2189 2190 return ret; 2191 } 2192 2193 void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t page_shift, 2194 uint64_t bus_offset, uint32_t nb_table, 2195 int *pfd, bool need_vfio) 2196 { 2197 long len; 2198 int fd; 2199 void *table; 2200 2201 /* 2202 * Must set fd to -1 so we don't try to munmap when called for 2203 * destroying the table, which the upper layers -will- do 2204 */ 2205 *pfd = -1; 2206 if (!cap_spapr_tce || (need_vfio && !cap_spapr_vfio)) { 2207 return NULL; 2208 } 2209 2210 if (cap_spapr_tce_64) { 2211 struct kvm_create_spapr_tce_64 args = { 2212 .liobn = liobn, 2213 .page_shift = page_shift, 2214 .offset = bus_offset >> page_shift, 2215 .size = nb_table, 2216 .flags = 0 2217 }; 2218 fd = kvm_vm_ioctl(kvm_state, KVM_CREATE_SPAPR_TCE_64, &args); 2219 if (fd < 0) { 2220 fprintf(stderr, 2221 "KVM: Failed to create TCE64 table for liobn 0x%x\n", 2222 liobn); 2223 return NULL; 2224 } 2225 } else if (cap_spapr_tce) { 2226 uint64_t window_size = (uint64_t) nb_table << page_shift; 2227 struct kvm_create_spapr_tce args = { 2228 .liobn = liobn, 2229 .window_size = window_size, 2230 }; 2231 if ((window_size != args.window_size) || bus_offset) { 2232 return NULL; 2233 } 2234 fd = kvm_vm_ioctl(kvm_state, KVM_CREATE_SPAPR_TCE, &args); 2235 if (fd < 0) { 2236 fprintf(stderr, "KVM: Failed to create TCE table for liobn 0x%x\n", 2237 liobn); 2238 return NULL; 2239 } 2240 } else { 2241 return NULL; 2242 } 2243 2244 len = nb_table * sizeof(uint64_t); 2245 /* FIXME: round this up to page size */ 2246 2247 table = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 2248 if (table == MAP_FAILED) { 2249 fprintf(stderr, "KVM: Failed to map TCE table for liobn 0x%x\n", 2250 liobn); 2251 close(fd); 2252 return NULL; 2253 } 2254 2255 *pfd = fd; 2256 return table; 2257 } 2258 2259 int kvmppc_remove_spapr_tce(void *table, int fd, uint32_t nb_table) 2260 { 2261 long len; 2262 2263 if (fd < 0) { 2264 return -1; 2265 } 2266 2267 len = nb_table * sizeof(uint64_t); 2268 if ((munmap(table, len) < 0) || 2269 (close(fd) < 0)) { 2270 fprintf(stderr, "KVM: Unexpected error removing TCE table: %s", 2271 strerror(errno)); 2272 /* Leak the table */ 2273 } 2274 2275 return 0; 2276 } 2277 2278 int kvmppc_reset_htab(int shift_hint) 2279 { 2280 uint32_t shift = shift_hint; 2281 2282 if (!kvm_enabled()) { 2283 /* Full emulation, tell caller to allocate htab itself */ 2284 return 0; 2285 } 2286 if (kvm_vm_check_extension(kvm_state, KVM_CAP_PPC_ALLOC_HTAB)) { 2287 int ret; 2288 ret = kvm_vm_ioctl(kvm_state, KVM_PPC_ALLOCATE_HTAB, &shift); 2289 if (ret == -ENOTTY) { 2290 /* 2291 * At least some versions of PR KVM advertise the 2292 * capability, but don't implement the ioctl(). Oops. 2293 * Return 0 so that we allocate the htab in qemu, as is 2294 * correct for PR. 2295 */ 2296 return 0; 2297 } else if (ret < 0) { 2298 return ret; 2299 } 2300 return shift; 2301 } 2302 2303 /* 2304 * We have a kernel that predates the htab reset calls. For PR 2305 * KVM, we need to allocate the htab ourselves, for an HV KVM of 2306 * this era, it has allocated a 16MB fixed size hash table 2307 * already. 2308 */ 2309 if (kvmppc_is_pr(kvm_state)) { 2310 /* PR - tell caller to allocate htab */ 2311 return 0; 2312 } else { 2313 /* HV - assume 16MB kernel allocated htab */ 2314 return 24; 2315 } 2316 } 2317 2318 static inline uint32_t mfpvr(void) 2319 { 2320 uint32_t pvr; 2321 2322 asm ("mfpvr %0" 2323 : "=r"(pvr)); 2324 return pvr; 2325 } 2326 2327 static void alter_insns(uint64_t *word, uint64_t flags, bool on) 2328 { 2329 if (on) { 2330 *word |= flags; 2331 } else { 2332 *word &= ~flags; 2333 } 2334 } 2335 2336 static void kvmppc_host_cpu_class_init(ObjectClass *oc, void *data) 2337 { 2338 PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc); 2339 uint32_t dcache_size = kvmppc_read_int_cpu_dt("d-cache-size"); 2340 uint32_t icache_size = kvmppc_read_int_cpu_dt("i-cache-size"); 2341 2342 /* Now fix up the class with information we can query from the host */ 2343 pcc->pvr = mfpvr(); 2344 2345 alter_insns(&pcc->insns_flags, PPC_ALTIVEC, 2346 qemu_getauxval(AT_HWCAP) & PPC_FEATURE_HAS_ALTIVEC); 2347 alter_insns(&pcc->insns_flags2, PPC2_VSX, 2348 qemu_getauxval(AT_HWCAP) & PPC_FEATURE_HAS_VSX); 2349 alter_insns(&pcc->insns_flags2, PPC2_DFP, 2350 qemu_getauxval(AT_HWCAP) & PPC_FEATURE_HAS_DFP); 2351 2352 if (dcache_size != -1) { 2353 pcc->l1_dcache_size = dcache_size; 2354 } 2355 2356 if (icache_size != -1) { 2357 pcc->l1_icache_size = icache_size; 2358 } 2359 2360 #if defined(TARGET_PPC64) 2361 pcc->radix_page_info = kvm_get_radix_page_info(); 2362 2363 if ((pcc->pvr & 0xffffff00) == CPU_POWERPC_POWER9_DD1) { 2364 /* 2365 * POWER9 DD1 has some bugs which make it not really ISA 3.00 2366 * compliant. More importantly, advertising ISA 3.00 2367 * architected mode may prevent guests from activating 2368 * necessary DD1 workarounds. 2369 */ 2370 pcc->pcr_supported &= ~(PCR_COMPAT_3_00 | PCR_COMPAT_2_07 2371 | PCR_COMPAT_2_06 | PCR_COMPAT_2_05); 2372 } 2373 #endif /* defined(TARGET_PPC64) */ 2374 } 2375 2376 bool kvmppc_has_cap_epr(void) 2377 { 2378 return cap_epr; 2379 } 2380 2381 bool kvmppc_has_cap_fixup_hcalls(void) 2382 { 2383 return cap_fixup_hcalls; 2384 } 2385 2386 bool kvmppc_has_cap_htm(void) 2387 { 2388 return cap_htm; 2389 } 2390 2391 bool kvmppc_has_cap_mmu_radix(void) 2392 { 2393 return cap_mmu_radix; 2394 } 2395 2396 bool kvmppc_has_cap_mmu_hash_v3(void) 2397 { 2398 return cap_mmu_hash_v3; 2399 } 2400 2401 static bool kvmppc_power8_host(void) 2402 { 2403 bool ret = false; 2404 #ifdef TARGET_PPC64 2405 { 2406 uint32_t base_pvr = CPU_POWERPC_POWER_SERVER_MASK & mfpvr(); 2407 ret = (base_pvr == CPU_POWERPC_POWER8E_BASE) || 2408 (base_pvr == CPU_POWERPC_POWER8NVL_BASE) || 2409 (base_pvr == CPU_POWERPC_POWER8_BASE); 2410 } 2411 #endif /* TARGET_PPC64 */ 2412 return ret; 2413 } 2414 2415 static int parse_cap_ppc_safe_cache(struct kvm_ppc_cpu_char c) 2416 { 2417 bool l1d_thread_priv_req = !kvmppc_power8_host(); 2418 2419 if (~c.behaviour & c.behaviour_mask & H_CPU_BEHAV_L1D_FLUSH_PR) { 2420 return 2; 2421 } else if ((!l1d_thread_priv_req || 2422 c.character & c.character_mask & H_CPU_CHAR_L1D_THREAD_PRIV) && 2423 (c.character & c.character_mask 2424 & (H_CPU_CHAR_L1D_FLUSH_ORI30 | H_CPU_CHAR_L1D_FLUSH_TRIG2))) { 2425 return 1; 2426 } 2427 2428 return 0; 2429 } 2430 2431 static int parse_cap_ppc_safe_bounds_check(struct kvm_ppc_cpu_char c) 2432 { 2433 if (~c.behaviour & c.behaviour_mask & H_CPU_BEHAV_BNDS_CHK_SPEC_BAR) { 2434 return 2; 2435 } else if (c.character & c.character_mask & H_CPU_CHAR_SPEC_BAR_ORI31) { 2436 return 1; 2437 } 2438 2439 return 0; 2440 } 2441 2442 static int parse_cap_ppc_safe_indirect_branch(struct kvm_ppc_cpu_char c) 2443 { 2444 if ((~c.behaviour & c.behaviour_mask & H_CPU_BEHAV_FLUSH_COUNT_CACHE) && 2445 (~c.character & c.character_mask & H_CPU_CHAR_CACHE_COUNT_DIS) && 2446 (~c.character & c.character_mask & H_CPU_CHAR_BCCTRL_SERIALISED)) { 2447 return SPAPR_CAP_FIXED_NA; 2448 } else if (c.behaviour & c.behaviour_mask & H_CPU_BEHAV_FLUSH_COUNT_CACHE) { 2449 return SPAPR_CAP_WORKAROUND; 2450 } else if (c.character & c.character_mask & H_CPU_CHAR_CACHE_COUNT_DIS) { 2451 return SPAPR_CAP_FIXED_CCD; 2452 } else if (c.character & c.character_mask & H_CPU_CHAR_BCCTRL_SERIALISED) { 2453 return SPAPR_CAP_FIXED_IBS; 2454 } 2455 2456 return 0; 2457 } 2458 2459 static int parse_cap_ppc_count_cache_flush_assist(struct kvm_ppc_cpu_char c) 2460 { 2461 if (c.character & c.character_mask & H_CPU_CHAR_BCCTR_FLUSH_ASSIST) { 2462 return 1; 2463 } 2464 return 0; 2465 } 2466 2467 bool kvmppc_has_cap_xive(void) 2468 { 2469 return cap_xive; 2470 } 2471 2472 static void kvmppc_get_cpu_characteristics(KVMState *s) 2473 { 2474 struct kvm_ppc_cpu_char c; 2475 int ret; 2476 2477 /* Assume broken */ 2478 cap_ppc_safe_cache = 0; 2479 cap_ppc_safe_bounds_check = 0; 2480 cap_ppc_safe_indirect_branch = 0; 2481 2482 ret = kvm_vm_check_extension(s, KVM_CAP_PPC_GET_CPU_CHAR); 2483 if (!ret) { 2484 return; 2485 } 2486 ret = kvm_vm_ioctl(s, KVM_PPC_GET_CPU_CHAR, &c); 2487 if (ret < 0) { 2488 return; 2489 } 2490 2491 cap_ppc_safe_cache = parse_cap_ppc_safe_cache(c); 2492 cap_ppc_safe_bounds_check = parse_cap_ppc_safe_bounds_check(c); 2493 cap_ppc_safe_indirect_branch = parse_cap_ppc_safe_indirect_branch(c); 2494 cap_ppc_count_cache_flush_assist = 2495 parse_cap_ppc_count_cache_flush_assist(c); 2496 } 2497 2498 int kvmppc_get_cap_safe_cache(void) 2499 { 2500 return cap_ppc_safe_cache; 2501 } 2502 2503 int kvmppc_get_cap_safe_bounds_check(void) 2504 { 2505 return cap_ppc_safe_bounds_check; 2506 } 2507 2508 int kvmppc_get_cap_safe_indirect_branch(void) 2509 { 2510 return cap_ppc_safe_indirect_branch; 2511 } 2512 2513 int kvmppc_get_cap_count_cache_flush_assist(void) 2514 { 2515 return cap_ppc_count_cache_flush_assist; 2516 } 2517 2518 bool kvmppc_has_cap_nested_kvm_hv(void) 2519 { 2520 return !!cap_ppc_nested_kvm_hv; 2521 } 2522 2523 int kvmppc_set_cap_nested_kvm_hv(int enable) 2524 { 2525 return kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_NESTED_HV, 0, enable); 2526 } 2527 2528 bool kvmppc_has_cap_spapr_vfio(void) 2529 { 2530 return cap_spapr_vfio; 2531 } 2532 2533 int kvmppc_get_cap_large_decr(void) 2534 { 2535 return cap_large_decr; 2536 } 2537 2538 int kvmppc_enable_cap_large_decr(PowerPCCPU *cpu, int enable) 2539 { 2540 CPUState *cs = CPU(cpu); 2541 uint64_t lpcr = 0; 2542 2543 kvm_get_one_reg(cs, KVM_REG_PPC_LPCR_64, &lpcr); 2544 /* Do we need to modify the LPCR? */ 2545 if (!!(lpcr & LPCR_LD) != !!enable) { 2546 if (enable) { 2547 lpcr |= LPCR_LD; 2548 } else { 2549 lpcr &= ~LPCR_LD; 2550 } 2551 kvm_set_one_reg(cs, KVM_REG_PPC_LPCR_64, &lpcr); 2552 kvm_get_one_reg(cs, KVM_REG_PPC_LPCR_64, &lpcr); 2553 2554 if (!!(lpcr & LPCR_LD) != !!enable) { 2555 return -1; 2556 } 2557 } 2558 2559 return 0; 2560 } 2561 2562 int kvmppc_has_cap_rpt_invalidate(void) 2563 { 2564 return cap_rpt_invalidate; 2565 } 2566 2567 PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void) 2568 { 2569 uint32_t host_pvr = mfpvr(); 2570 PowerPCCPUClass *pvr_pcc; 2571 2572 pvr_pcc = ppc_cpu_class_by_pvr(host_pvr); 2573 if (pvr_pcc == NULL) { 2574 pvr_pcc = ppc_cpu_class_by_pvr_mask(host_pvr); 2575 } 2576 2577 return pvr_pcc; 2578 } 2579 2580 static void pseries_machine_class_fixup(ObjectClass *oc, void *opaque) 2581 { 2582 MachineClass *mc = MACHINE_CLASS(oc); 2583 2584 mc->default_cpu_type = TYPE_HOST_POWERPC_CPU; 2585 } 2586 2587 static int kvm_ppc_register_host_cpu_type(void) 2588 { 2589 TypeInfo type_info = { 2590 .name = TYPE_HOST_POWERPC_CPU, 2591 .class_init = kvmppc_host_cpu_class_init, 2592 }; 2593 PowerPCCPUClass *pvr_pcc; 2594 ObjectClass *oc; 2595 DeviceClass *dc; 2596 int i; 2597 2598 pvr_pcc = kvm_ppc_get_host_cpu_class(); 2599 if (pvr_pcc == NULL) { 2600 return -1; 2601 } 2602 type_info.parent = object_class_get_name(OBJECT_CLASS(pvr_pcc)); 2603 type_register(&type_info); 2604 /* override TCG default cpu type with 'host' cpu model */ 2605 object_class_foreach(pseries_machine_class_fixup, TYPE_SPAPR_MACHINE, 2606 false, NULL); 2607 2608 oc = object_class_by_name(type_info.name); 2609 g_assert(oc); 2610 2611 /* 2612 * Update generic CPU family class alias (e.g. on a POWER8NVL host, 2613 * we want "POWER8" to be a "family" alias that points to the current 2614 * host CPU type, too) 2615 */ 2616 dc = DEVICE_CLASS(ppc_cpu_get_family_class(pvr_pcc)); 2617 for (i = 0; ppc_cpu_aliases[i].alias != NULL; i++) { 2618 if (strcasecmp(ppc_cpu_aliases[i].alias, dc->desc) == 0) { 2619 char *suffix; 2620 2621 ppc_cpu_aliases[i].model = g_strdup(object_class_get_name(oc)); 2622 suffix = strstr(ppc_cpu_aliases[i].model, POWERPC_CPU_TYPE_SUFFIX); 2623 if (suffix) { 2624 *suffix = 0; 2625 } 2626 break; 2627 } 2628 } 2629 2630 return 0; 2631 } 2632 2633 int kvmppc_define_rtas_kernel_token(uint32_t token, const char *function) 2634 { 2635 struct kvm_rtas_token_args args = { 2636 .token = token, 2637 }; 2638 2639 if (!kvm_check_extension(kvm_state, KVM_CAP_PPC_RTAS)) { 2640 return -ENOENT; 2641 } 2642 2643 strncpy(args.name, function, sizeof(args.name) - 1); 2644 2645 return kvm_vm_ioctl(kvm_state, KVM_PPC_RTAS_DEFINE_TOKEN, &args); 2646 } 2647 2648 int kvmppc_get_htab_fd(bool write, uint64_t index, Error **errp) 2649 { 2650 struct kvm_get_htab_fd s = { 2651 .flags = write ? KVM_GET_HTAB_WRITE : 0, 2652 .start_index = index, 2653 }; 2654 int ret; 2655 2656 if (!cap_htab_fd) { 2657 error_setg(errp, "KVM version doesn't support %s the HPT", 2658 write ? "writing" : "reading"); 2659 return -ENOTSUP; 2660 } 2661 2662 ret = kvm_vm_ioctl(kvm_state, KVM_PPC_GET_HTAB_FD, &s); 2663 if (ret < 0) { 2664 error_setg(errp, "Unable to open fd for %s HPT %s KVM: %s", 2665 write ? "writing" : "reading", write ? "to" : "from", 2666 strerror(errno)); 2667 return -errno; 2668 } 2669 2670 return ret; 2671 } 2672 2673 int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, int64_t max_ns) 2674 { 2675 int64_t starttime = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); 2676 uint8_t buf[bufsize]; 2677 ssize_t rc; 2678 2679 do { 2680 rc = read(fd, buf, bufsize); 2681 if (rc < 0) { 2682 fprintf(stderr, "Error reading data from KVM HTAB fd: %s\n", 2683 strerror(errno)); 2684 return rc; 2685 } else if (rc) { 2686 uint8_t *buffer = buf; 2687 ssize_t n = rc; 2688 while (n) { 2689 struct kvm_get_htab_header *head = 2690 (struct kvm_get_htab_header *) buffer; 2691 size_t chunksize = sizeof(*head) + 2692 HASH_PTE_SIZE_64 * head->n_valid; 2693 2694 qemu_put_be32(f, head->index); 2695 qemu_put_be16(f, head->n_valid); 2696 qemu_put_be16(f, head->n_invalid); 2697 qemu_put_buffer(f, (void *)(head + 1), 2698 HASH_PTE_SIZE_64 * head->n_valid); 2699 2700 buffer += chunksize; 2701 n -= chunksize; 2702 } 2703 } 2704 } while ((rc != 0) 2705 && ((max_ns < 0) || 2706 ((qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - starttime) < max_ns))); 2707 2708 return (rc == 0) ? 1 : 0; 2709 } 2710 2711 int kvmppc_load_htab_chunk(QEMUFile *f, int fd, uint32_t index, 2712 uint16_t n_valid, uint16_t n_invalid, Error **errp) 2713 { 2714 struct kvm_get_htab_header *buf; 2715 size_t chunksize = sizeof(*buf) + n_valid * HASH_PTE_SIZE_64; 2716 ssize_t rc; 2717 2718 buf = alloca(chunksize); 2719 buf->index = index; 2720 buf->n_valid = n_valid; 2721 buf->n_invalid = n_invalid; 2722 2723 qemu_get_buffer(f, (void *)(buf + 1), HASH_PTE_SIZE_64 * n_valid); 2724 2725 rc = write(fd, buf, chunksize); 2726 if (rc < 0) { 2727 error_setg_errno(errp, errno, "Error writing the KVM hash table"); 2728 return -errno; 2729 } 2730 if (rc != chunksize) { 2731 /* We should never get a short write on a single chunk */ 2732 error_setg(errp, "Short write while restoring the KVM hash table"); 2733 return -ENOSPC; 2734 } 2735 return 0; 2736 } 2737 2738 bool kvm_arch_stop_on_emulation_error(CPUState *cpu) 2739 { 2740 return true; 2741 } 2742 2743 void kvm_arch_init_irq_routing(KVMState *s) 2744 { 2745 } 2746 2747 void kvmppc_read_hptes(ppc_hash_pte64_t *hptes, hwaddr ptex, int n) 2748 { 2749 int fd, rc; 2750 int i; 2751 2752 fd = kvmppc_get_htab_fd(false, ptex, &error_abort); 2753 2754 i = 0; 2755 while (i < n) { 2756 struct kvm_get_htab_header *hdr; 2757 int m = n < HPTES_PER_GROUP ? n : HPTES_PER_GROUP; 2758 char buf[sizeof(*hdr) + m * HASH_PTE_SIZE_64]; 2759 2760 rc = read(fd, buf, sizeof(buf)); 2761 if (rc < 0) { 2762 hw_error("kvmppc_read_hptes: Unable to read HPTEs"); 2763 } 2764 2765 hdr = (struct kvm_get_htab_header *)buf; 2766 while ((i < n) && ((char *)hdr < (buf + rc))) { 2767 int invalid = hdr->n_invalid, valid = hdr->n_valid; 2768 2769 if (hdr->index != (ptex + i)) { 2770 hw_error("kvmppc_read_hptes: Unexpected HPTE index %"PRIu32 2771 " != (%"HWADDR_PRIu" + %d", hdr->index, ptex, i); 2772 } 2773 2774 if (n - i < valid) { 2775 valid = n - i; 2776 } 2777 memcpy(hptes + i, hdr + 1, HASH_PTE_SIZE_64 * valid); 2778 i += valid; 2779 2780 if ((n - i) < invalid) { 2781 invalid = n - i; 2782 } 2783 memset(hptes + i, 0, invalid * HASH_PTE_SIZE_64); 2784 i += invalid; 2785 2786 hdr = (struct kvm_get_htab_header *) 2787 ((char *)(hdr + 1) + HASH_PTE_SIZE_64 * hdr->n_valid); 2788 } 2789 } 2790 2791 close(fd); 2792 } 2793 2794 void kvmppc_write_hpte(hwaddr ptex, uint64_t pte0, uint64_t pte1) 2795 { 2796 int fd, rc; 2797 struct { 2798 struct kvm_get_htab_header hdr; 2799 uint64_t pte0; 2800 uint64_t pte1; 2801 } buf; 2802 2803 fd = kvmppc_get_htab_fd(true, 0 /* Ignored */, &error_abort); 2804 2805 buf.hdr.n_valid = 1; 2806 buf.hdr.n_invalid = 0; 2807 buf.hdr.index = ptex; 2808 buf.pte0 = cpu_to_be64(pte0); 2809 buf.pte1 = cpu_to_be64(pte1); 2810 2811 rc = write(fd, &buf, sizeof(buf)); 2812 if (rc != sizeof(buf)) { 2813 hw_error("kvmppc_write_hpte: Unable to update KVM HPT"); 2814 } 2815 close(fd); 2816 } 2817 2818 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, 2819 uint64_t address, uint32_t data, PCIDevice *dev) 2820 { 2821 return 0; 2822 } 2823 2824 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, 2825 int vector, PCIDevice *dev) 2826 { 2827 return 0; 2828 } 2829 2830 int kvm_arch_release_virq_post(int virq) 2831 { 2832 return 0; 2833 } 2834 2835 int kvm_arch_msi_data_to_gsi(uint32_t data) 2836 { 2837 return data & 0xffff; 2838 } 2839 2840 #if defined(TARGET_PPC64) 2841 int kvm_handle_nmi(PowerPCCPU *cpu, struct kvm_run *run) 2842 { 2843 uint16_t flags = run->flags & KVM_RUN_PPC_NMI_DISP_MASK; 2844 2845 cpu_synchronize_state(CPU(cpu)); 2846 2847 spapr_mce_req_event(cpu, flags == KVM_RUN_PPC_NMI_DISP_FULLY_RECOV); 2848 2849 return 0; 2850 } 2851 #endif 2852 2853 int kvmppc_enable_hwrng(void) 2854 { 2855 if (!kvm_enabled() || !kvm_check_extension(kvm_state, KVM_CAP_PPC_HWRNG)) { 2856 return -1; 2857 } 2858 2859 return kvmppc_enable_hcall(kvm_state, H_RANDOM); 2860 } 2861 2862 void kvmppc_check_papr_resize_hpt(Error **errp) 2863 { 2864 if (!kvm_enabled()) { 2865 return; /* No KVM, we're good */ 2866 } 2867 2868 if (cap_resize_hpt) { 2869 return; /* Kernel has explicit support, we're good */ 2870 } 2871 2872 /* Otherwise fallback on looking for PR KVM */ 2873 if (kvmppc_is_pr(kvm_state)) { 2874 return; 2875 } 2876 2877 error_setg(errp, 2878 "Hash page table resizing not available with this KVM version"); 2879 } 2880 2881 int kvmppc_resize_hpt_prepare(PowerPCCPU *cpu, target_ulong flags, int shift) 2882 { 2883 CPUState *cs = CPU(cpu); 2884 struct kvm_ppc_resize_hpt rhpt = { 2885 .flags = flags, 2886 .shift = shift, 2887 }; 2888 2889 if (!cap_resize_hpt) { 2890 return -ENOSYS; 2891 } 2892 2893 return kvm_vm_ioctl(cs->kvm_state, KVM_PPC_RESIZE_HPT_PREPARE, &rhpt); 2894 } 2895 2896 int kvmppc_resize_hpt_commit(PowerPCCPU *cpu, target_ulong flags, int shift) 2897 { 2898 CPUState *cs = CPU(cpu); 2899 struct kvm_ppc_resize_hpt rhpt = { 2900 .flags = flags, 2901 .shift = shift, 2902 }; 2903 2904 if (!cap_resize_hpt) { 2905 return -ENOSYS; 2906 } 2907 2908 return kvm_vm_ioctl(cs->kvm_state, KVM_PPC_RESIZE_HPT_COMMIT, &rhpt); 2909 } 2910 2911 /* 2912 * This is a helper function to detect a post migration scenario 2913 * in which a guest, running as KVM-HV, freezes in cpu_post_load because 2914 * the guest kernel can't handle a PVR value other than the actual host 2915 * PVR in KVM_SET_SREGS, even if pvr_match() returns true. 2916 * 2917 * If we don't have cap_ppc_pvr_compat and we're not running in PR 2918 * (so, we're HV), return true. The workaround itself is done in 2919 * cpu_post_load. 2920 * 2921 * The order here is important: we'll only check for KVM PR as a 2922 * fallback if the guest kernel can't handle the situation itself. 2923 * We need to avoid as much as possible querying the running KVM type 2924 * in QEMU level. 2925 */ 2926 bool kvmppc_pvr_workaround_required(PowerPCCPU *cpu) 2927 { 2928 CPUState *cs = CPU(cpu); 2929 2930 if (!kvm_enabled()) { 2931 return false; 2932 } 2933 2934 if (cap_ppc_pvr_compat) { 2935 return false; 2936 } 2937 2938 return !kvmppc_is_pr(cs->kvm_state); 2939 } 2940 2941 void kvmppc_set_reg_ppc_online(PowerPCCPU *cpu, unsigned int online) 2942 { 2943 CPUState *cs = CPU(cpu); 2944 2945 if (kvm_enabled()) { 2946 kvm_set_one_reg(cs, KVM_REG_PPC_ONLINE, &online); 2947 } 2948 } 2949 2950 void kvmppc_set_reg_tb_offset(PowerPCCPU *cpu, int64_t tb_offset) 2951 { 2952 CPUState *cs = CPU(cpu); 2953 2954 if (kvm_enabled()) { 2955 kvm_set_one_reg(cs, KVM_REG_PPC_TB_OFFSET, &tb_offset); 2956 } 2957 } 2958 2959 bool kvm_arch_cpu_check_are_resettable(void) 2960 { 2961 return true; 2962 } 2963