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 "qemu-common.h" 25 #include "qapi/error.h" 26 #include "qemu/error-report.h" 27 #include "cpu.h" 28 #include "cpu-models.h" 29 #include "qemu/timer.h" 30 #include "sysemu/hw_accel.h" 31 #include "kvm_ppc.h" 32 #include "sysemu/cpus.h" 33 #include "sysemu/device_tree.h" 34 #include "mmu-hash64.h" 35 36 #include "hw/sysbus.h" 37 #include "hw/ppc/spapr.h" 38 #include "hw/ppc/spapr_cpu_core.h" 39 #include "hw/hw.h" 40 #include "hw/ppc/ppc.h" 41 #include "migration/qemu-file-types.h" 42 #include "sysemu/watchdog.h" 43 #include "trace.h" 44 #include "exec/gdbstub.h" 45 #include "exec/memattrs.h" 46 #include "exec/ram_addr.h" 47 #include "sysemu/hostmem.h" 48 #include "qemu/cutils.h" 49 #include "qemu/main-loop.h" 50 #include "qemu/mmap-alloc.h" 51 #include "elf.h" 52 #include "sysemu/kvm_int.h" 53 54 #define PROC_DEVTREE_CPU "/proc/device-tree/cpus/" 55 56 const KVMCapabilityInfo kvm_arch_required_capabilities[] = { 57 KVM_CAP_LAST_INFO 58 }; 59 60 static int cap_interrupt_unset; 61 static int cap_segstate; 62 static int cap_booke_sregs; 63 static int cap_ppc_smt; 64 static int cap_ppc_smt_possible; 65 static int cap_spapr_tce; 66 static int cap_spapr_tce_64; 67 static int cap_spapr_multitce; 68 static int cap_spapr_vfio; 69 static int cap_hior; 70 static int cap_one_reg; 71 static int cap_epr; 72 static int cap_ppc_watchdog; 73 static int cap_papr; 74 static int cap_htab_fd; 75 static int cap_fixup_hcalls; 76 static int cap_htm; /* Hardware transactional memory support */ 77 static int cap_mmu_radix; 78 static int cap_mmu_hash_v3; 79 static int cap_xive; 80 static int cap_resize_hpt; 81 static int cap_ppc_pvr_compat; 82 static int cap_ppc_safe_cache; 83 static int cap_ppc_safe_bounds_check; 84 static int cap_ppc_safe_indirect_branch; 85 static int cap_ppc_count_cache_flush_assist; 86 static int cap_ppc_nested_kvm_hv; 87 static int cap_large_decr; 88 89 static uint32_t debug_inst_opcode; 90 91 /* 92 * Check whether we are running with KVM-PR (instead of KVM-HV). This 93 * should only be used for fallback tests - generally we should use 94 * explicit capabilities for the features we want, rather than 95 * assuming what is/isn't available depending on the KVM variant. 96 */ 97 static bool kvmppc_is_pr(KVMState *ks) 98 { 99 /* Assume KVM-PR if the GET_PVINFO capability is available */ 100 return kvm_vm_check_extension(ks, KVM_CAP_PPC_GET_PVINFO) != 0; 101 } 102 103 static int kvm_ppc_register_host_cpu_type(void); 104 static void kvmppc_get_cpu_characteristics(KVMState *s); 105 static int kvmppc_get_dec_bits(void); 106 107 int kvm_arch_init(MachineState *ms, KVMState *s) 108 { 109 cap_interrupt_unset = kvm_check_extension(s, KVM_CAP_PPC_UNSET_IRQ); 110 cap_segstate = kvm_check_extension(s, KVM_CAP_PPC_SEGSTATE); 111 cap_booke_sregs = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_SREGS); 112 cap_ppc_smt_possible = kvm_vm_check_extension(s, KVM_CAP_PPC_SMT_POSSIBLE); 113 cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE); 114 cap_spapr_tce_64 = kvm_check_extension(s, KVM_CAP_SPAPR_TCE_64); 115 cap_spapr_multitce = kvm_check_extension(s, KVM_CAP_SPAPR_MULTITCE); 116 cap_spapr_vfio = kvm_vm_check_extension(s, KVM_CAP_SPAPR_TCE_VFIO); 117 cap_one_reg = kvm_check_extension(s, KVM_CAP_ONE_REG); 118 cap_hior = kvm_check_extension(s, KVM_CAP_PPC_HIOR); 119 cap_epr = kvm_check_extension(s, KVM_CAP_PPC_EPR); 120 cap_ppc_watchdog = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_WATCHDOG); 121 /* 122 * Note: we don't set cap_papr here, because this capability is 123 * only activated after this by kvmppc_set_papr() 124 */ 125 cap_htab_fd = kvm_vm_check_extension(s, KVM_CAP_PPC_HTAB_FD); 126 cap_fixup_hcalls = kvm_check_extension(s, KVM_CAP_PPC_FIXUP_HCALL); 127 cap_ppc_smt = kvm_vm_check_extension(s, KVM_CAP_PPC_SMT); 128 cap_htm = kvm_vm_check_extension(s, KVM_CAP_PPC_HTM); 129 cap_mmu_radix = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_RADIX); 130 cap_mmu_hash_v3 = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_HASH_V3); 131 cap_xive = kvm_vm_check_extension(s, KVM_CAP_PPC_IRQ_XIVE); 132 cap_resize_hpt = kvm_vm_check_extension(s, KVM_CAP_SPAPR_RESIZE_HPT); 133 kvmppc_get_cpu_characteristics(s); 134 cap_ppc_nested_kvm_hv = kvm_vm_check_extension(s, KVM_CAP_PPC_NESTED_HV); 135 cap_large_decr = kvmppc_get_dec_bits(); 136 /* 137 * Note: setting it to false because there is not such capability 138 * in KVM at this moment. 139 * 140 * TODO: call kvm_vm_check_extension() with the right capability 141 * after the kernel starts implementing it. 142 */ 143 cap_ppc_pvr_compat = false; 144 145 if (!kvm_check_extension(s, KVM_CAP_PPC_IRQ_LEVEL)) { 146 error_report("KVM: Host kernel doesn't have level irq capability"); 147 exit(1); 148 } 149 150 kvm_ppc_register_host_cpu_type(); 151 152 return 0; 153 } 154 155 int kvm_arch_irqchip_create(MachineState *ms, KVMState *s) 156 { 157 return 0; 158 } 159 160 static int kvm_arch_sync_sregs(PowerPCCPU *cpu) 161 { 162 CPUPPCState *cenv = &cpu->env; 163 CPUState *cs = CPU(cpu); 164 struct kvm_sregs sregs; 165 int ret; 166 167 if (cenv->excp_model == POWERPC_EXCP_BOOKE) { 168 /* 169 * What we're really trying to say is "if we're on BookE, we 170 * use the native PVR for now". This is the only sane way to 171 * check it though, so we potentially confuse users that they 172 * can run BookE guests on BookS. Let's hope nobody dares 173 * enough :) 174 */ 175 return 0; 176 } else { 177 if (!cap_segstate) { 178 fprintf(stderr, "kvm error: missing PVR setting capability\n"); 179 return -ENOSYS; 180 } 181 } 182 183 ret = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs); 184 if (ret) { 185 return ret; 186 } 187 188 sregs.pvr = cenv->spr[SPR_PVR]; 189 return kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs); 190 } 191 192 /* Set up a shared TLB array with KVM */ 193 static int kvm_booke206_tlb_init(PowerPCCPU *cpu) 194 { 195 CPUPPCState *env = &cpu->env; 196 CPUState *cs = CPU(cpu); 197 struct kvm_book3e_206_tlb_params params = {}; 198 struct kvm_config_tlb cfg = {}; 199 unsigned int entries = 0; 200 int ret, i; 201 202 if (!kvm_enabled() || 203 !kvm_check_extension(cs->kvm_state, KVM_CAP_SW_TLB)) { 204 return 0; 205 } 206 207 assert(ARRAY_SIZE(params.tlb_sizes) == BOOKE206_MAX_TLBN); 208 209 for (i = 0; i < BOOKE206_MAX_TLBN; i++) { 210 params.tlb_sizes[i] = booke206_tlb_size(env, i); 211 params.tlb_ways[i] = booke206_tlb_ways(env, i); 212 entries += params.tlb_sizes[i]; 213 } 214 215 assert(entries == env->nb_tlb); 216 assert(sizeof(struct kvm_book3e_206_tlb_entry) == sizeof(ppcmas_tlb_t)); 217 218 env->tlb_dirty = true; 219 220 cfg.array = (uintptr_t)env->tlb.tlbm; 221 cfg.array_len = sizeof(ppcmas_tlb_t) * entries; 222 cfg.params = (uintptr_t)¶ms; 223 cfg.mmu_type = KVM_MMU_FSL_BOOKE_NOHV; 224 225 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_SW_TLB, 0, (uintptr_t)&cfg); 226 if (ret < 0) { 227 fprintf(stderr, "%s: couldn't enable KVM_CAP_SW_TLB: %s\n", 228 __func__, strerror(-ret)); 229 return ret; 230 } 231 232 env->kvm_sw_tlb = true; 233 return 0; 234 } 235 236 237 #if defined(TARGET_PPC64) 238 static void kvm_get_smmu_info(struct kvm_ppc_smmu_info *info, Error **errp) 239 { 240 int ret; 241 242 assert(kvm_state != NULL); 243 244 if (!kvm_check_extension(kvm_state, KVM_CAP_PPC_GET_SMMU_INFO)) { 245 error_setg(errp, "KVM doesn't expose the MMU features it supports"); 246 error_append_hint(errp, "Consider switching to a newer KVM\n"); 247 return; 248 } 249 250 ret = kvm_vm_ioctl(kvm_state, KVM_PPC_GET_SMMU_INFO, info); 251 if (ret == 0) { 252 return; 253 } 254 255 error_setg_errno(errp, -ret, 256 "KVM failed to provide the MMU features it supports"); 257 } 258 259 struct ppc_radix_page_info *kvm_get_radix_page_info(void) 260 { 261 KVMState *s = KVM_STATE(current_machine->accelerator); 262 struct ppc_radix_page_info *radix_page_info; 263 struct kvm_ppc_rmmu_info rmmu_info; 264 int i; 265 266 if (!kvm_check_extension(s, KVM_CAP_PPC_MMU_RADIX)) { 267 return NULL; 268 } 269 if (kvm_vm_ioctl(s, KVM_PPC_GET_RMMU_INFO, &rmmu_info)) { 270 return NULL; 271 } 272 radix_page_info = g_malloc0(sizeof(*radix_page_info)); 273 radix_page_info->count = 0; 274 for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) { 275 if (rmmu_info.ap_encodings[i]) { 276 radix_page_info->entries[i] = rmmu_info.ap_encodings[i]; 277 radix_page_info->count++; 278 } 279 } 280 return radix_page_info; 281 } 282 283 target_ulong kvmppc_configure_v3_mmu(PowerPCCPU *cpu, 284 bool radix, bool gtse, 285 uint64_t proc_tbl) 286 { 287 CPUState *cs = CPU(cpu); 288 int ret; 289 uint64_t flags = 0; 290 struct kvm_ppc_mmuv3_cfg cfg = { 291 .process_table = proc_tbl, 292 }; 293 294 if (radix) { 295 flags |= KVM_PPC_MMUV3_RADIX; 296 } 297 if (gtse) { 298 flags |= KVM_PPC_MMUV3_GTSE; 299 } 300 cfg.flags = flags; 301 ret = kvm_vm_ioctl(cs->kvm_state, KVM_PPC_CONFIGURE_V3_MMU, &cfg); 302 switch (ret) { 303 case 0: 304 return H_SUCCESS; 305 case -EINVAL: 306 return H_PARAMETER; 307 case -ENODEV: 308 return H_NOT_AVAILABLE; 309 default: 310 return H_HARDWARE; 311 } 312 } 313 314 bool kvmppc_hpt_needs_host_contiguous_pages(void) 315 { 316 static struct kvm_ppc_smmu_info smmu_info; 317 318 if (!kvm_enabled()) { 319 return false; 320 } 321 322 kvm_get_smmu_info(&smmu_info, &error_fatal); 323 return !!(smmu_info.flags & KVM_PPC_PAGE_SIZES_REAL); 324 } 325 326 void kvm_check_mmu(PowerPCCPU *cpu, Error **errp) 327 { 328 struct kvm_ppc_smmu_info smmu_info; 329 int iq, ik, jq, jk; 330 Error *local_err = NULL; 331 332 /* For now, we only have anything to check on hash64 MMUs */ 333 if (!cpu->hash64_opts || !kvm_enabled()) { 334 return; 335 } 336 337 kvm_get_smmu_info(&smmu_info, &local_err); 338 if (local_err) { 339 error_propagate(errp, local_err); 340 return; 341 } 342 343 if (ppc_hash64_has(cpu, PPC_HASH64_1TSEG) 344 && !(smmu_info.flags & KVM_PPC_1T_SEGMENTS)) { 345 error_setg(errp, 346 "KVM does not support 1TiB segments which guest expects"); 347 return; 348 } 349 350 if (smmu_info.slb_size < cpu->hash64_opts->slb_size) { 351 error_setg(errp, "KVM only supports %u SLB entries, but guest needs %u", 352 smmu_info.slb_size, cpu->hash64_opts->slb_size); 353 return; 354 } 355 356 /* 357 * Verify that every pagesize supported by the cpu model is 358 * supported by KVM with the same encodings 359 */ 360 for (iq = 0; iq < ARRAY_SIZE(cpu->hash64_opts->sps); iq++) { 361 PPCHash64SegmentPageSizes *qsps = &cpu->hash64_opts->sps[iq]; 362 struct kvm_ppc_one_seg_page_size *ksps; 363 364 for (ik = 0; ik < ARRAY_SIZE(smmu_info.sps); ik++) { 365 if (qsps->page_shift == smmu_info.sps[ik].page_shift) { 366 break; 367 } 368 } 369 if (ik >= ARRAY_SIZE(smmu_info.sps)) { 370 error_setg(errp, "KVM doesn't support for base page shift %u", 371 qsps->page_shift); 372 return; 373 } 374 375 ksps = &smmu_info.sps[ik]; 376 if (ksps->slb_enc != qsps->slb_enc) { 377 error_setg(errp, 378 "KVM uses SLB encoding 0x%x for page shift %u, but guest expects 0x%x", 379 ksps->slb_enc, ksps->page_shift, qsps->slb_enc); 380 return; 381 } 382 383 for (jq = 0; jq < ARRAY_SIZE(qsps->enc); jq++) { 384 for (jk = 0; jk < ARRAY_SIZE(ksps->enc); jk++) { 385 if (qsps->enc[jq].page_shift == ksps->enc[jk].page_shift) { 386 break; 387 } 388 } 389 390 if (jk >= ARRAY_SIZE(ksps->enc)) { 391 error_setg(errp, "KVM doesn't support page shift %u/%u", 392 qsps->enc[jq].page_shift, qsps->page_shift); 393 return; 394 } 395 if (qsps->enc[jq].pte_enc != ksps->enc[jk].pte_enc) { 396 error_setg(errp, 397 "KVM uses PTE encoding 0x%x for page shift %u/%u, but guest expects 0x%x", 398 ksps->enc[jk].pte_enc, qsps->enc[jq].page_shift, 399 qsps->page_shift, qsps->enc[jq].pte_enc); 400 return; 401 } 402 } 403 } 404 405 if (ppc_hash64_has(cpu, PPC_HASH64_CI_LARGEPAGE)) { 406 /* 407 * Mostly what guest pagesizes we can use are related to the 408 * host pages used to map guest RAM, which is handled in the 409 * platform code. Cache-Inhibited largepages (64k) however are 410 * used for I/O, so if they're mapped to the host at all it 411 * will be a normal mapping, not a special hugepage one used 412 * for RAM. 413 */ 414 if (qemu_real_host_page_size < 0x10000) { 415 error_setg(errp, 416 "KVM can't supply 64kiB CI pages, which guest expects"); 417 } 418 } 419 } 420 #endif /* !defined (TARGET_PPC64) */ 421 422 unsigned long kvm_arch_vcpu_id(CPUState *cpu) 423 { 424 return POWERPC_CPU(cpu)->vcpu_id; 425 } 426 427 /* 428 * e500 supports 2 h/w breakpoint and 2 watchpoint. book3s supports 429 * only 1 watchpoint, so array size of 4 is sufficient for now. 430 */ 431 #define MAX_HW_BKPTS 4 432 433 static struct HWBreakpoint { 434 target_ulong addr; 435 int type; 436 } hw_debug_points[MAX_HW_BKPTS]; 437 438 static CPUWatchpoint hw_watchpoint; 439 440 /* Default there is no breakpoint and watchpoint supported */ 441 static int max_hw_breakpoint; 442 static int max_hw_watchpoint; 443 static int nb_hw_breakpoint; 444 static int nb_hw_watchpoint; 445 446 static void kvmppc_hw_debug_points_init(CPUPPCState *cenv) 447 { 448 if (cenv->excp_model == POWERPC_EXCP_BOOKE) { 449 max_hw_breakpoint = 2; 450 max_hw_watchpoint = 2; 451 } 452 453 if ((max_hw_breakpoint + max_hw_watchpoint) > MAX_HW_BKPTS) { 454 fprintf(stderr, "Error initializing h/w breakpoints\n"); 455 return; 456 } 457 } 458 459 int kvm_arch_init_vcpu(CPUState *cs) 460 { 461 PowerPCCPU *cpu = POWERPC_CPU(cs); 462 CPUPPCState *cenv = &cpu->env; 463 int ret; 464 465 /* Synchronize sregs with kvm */ 466 ret = kvm_arch_sync_sregs(cpu); 467 if (ret) { 468 if (ret == -EINVAL) { 469 error_report("Register sync failed... If you're using kvm-hv.ko," 470 " only \"-cpu host\" is possible"); 471 } 472 return ret; 473 } 474 475 switch (cenv->mmu_model) { 476 case POWERPC_MMU_BOOKE206: 477 /* This target supports access to KVM's guest TLB */ 478 ret = kvm_booke206_tlb_init(cpu); 479 break; 480 case POWERPC_MMU_2_07: 481 if (!cap_htm && !kvmppc_is_pr(cs->kvm_state)) { 482 /* 483 * KVM-HV has transactional memory on POWER8 also without 484 * the KVM_CAP_PPC_HTM extension, so enable it here 485 * instead as long as it's availble to userspace on the 486 * host. 487 */ 488 if (qemu_getauxval(AT_HWCAP2) & PPC_FEATURE2_HAS_HTM) { 489 cap_htm = true; 490 } 491 } 492 break; 493 default: 494 break; 495 } 496 497 kvm_get_one_reg(cs, KVM_REG_PPC_DEBUG_INST, &debug_inst_opcode); 498 kvmppc_hw_debug_points_init(cenv); 499 500 return ret; 501 } 502 503 int kvm_arch_destroy_vcpu(CPUState *cs) 504 { 505 return 0; 506 } 507 508 static void kvm_sw_tlb_put(PowerPCCPU *cpu) 509 { 510 CPUPPCState *env = &cpu->env; 511 CPUState *cs = CPU(cpu); 512 struct kvm_dirty_tlb dirty_tlb; 513 unsigned char *bitmap; 514 int ret; 515 516 if (!env->kvm_sw_tlb) { 517 return; 518 } 519 520 bitmap = g_malloc((env->nb_tlb + 7) / 8); 521 memset(bitmap, 0xFF, (env->nb_tlb + 7) / 8); 522 523 dirty_tlb.bitmap = (uintptr_t)bitmap; 524 dirty_tlb.num_dirty = env->nb_tlb; 525 526 ret = kvm_vcpu_ioctl(cs, KVM_DIRTY_TLB, &dirty_tlb); 527 if (ret) { 528 fprintf(stderr, "%s: KVM_DIRTY_TLB: %s\n", 529 __func__, strerror(-ret)); 530 } 531 532 g_free(bitmap); 533 } 534 535 static void kvm_get_one_spr(CPUState *cs, uint64_t id, int spr) 536 { 537 PowerPCCPU *cpu = POWERPC_CPU(cs); 538 CPUPPCState *env = &cpu->env; 539 union { 540 uint32_t u32; 541 uint64_t u64; 542 } val; 543 struct kvm_one_reg reg = { 544 .id = id, 545 .addr = (uintptr_t) &val, 546 }; 547 int ret; 548 549 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 550 if (ret != 0) { 551 trace_kvm_failed_spr_get(spr, strerror(errno)); 552 } else { 553 switch (id & KVM_REG_SIZE_MASK) { 554 case KVM_REG_SIZE_U32: 555 env->spr[spr] = val.u32; 556 break; 557 558 case KVM_REG_SIZE_U64: 559 env->spr[spr] = val.u64; 560 break; 561 562 default: 563 /* Don't handle this size yet */ 564 abort(); 565 } 566 } 567 } 568 569 static void kvm_put_one_spr(CPUState *cs, uint64_t id, int spr) 570 { 571 PowerPCCPU *cpu = POWERPC_CPU(cs); 572 CPUPPCState *env = &cpu->env; 573 union { 574 uint32_t u32; 575 uint64_t u64; 576 } val; 577 struct kvm_one_reg reg = { 578 .id = id, 579 .addr = (uintptr_t) &val, 580 }; 581 int ret; 582 583 switch (id & KVM_REG_SIZE_MASK) { 584 case KVM_REG_SIZE_U32: 585 val.u32 = env->spr[spr]; 586 break; 587 588 case KVM_REG_SIZE_U64: 589 val.u64 = env->spr[spr]; 590 break; 591 592 default: 593 /* Don't handle this size yet */ 594 abort(); 595 } 596 597 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 598 if (ret != 0) { 599 trace_kvm_failed_spr_set(spr, strerror(errno)); 600 } 601 } 602 603 static int kvm_put_fp(CPUState *cs) 604 { 605 PowerPCCPU *cpu = POWERPC_CPU(cs); 606 CPUPPCState *env = &cpu->env; 607 struct kvm_one_reg reg; 608 int i; 609 int ret; 610 611 if (env->insns_flags & PPC_FLOAT) { 612 uint64_t fpscr = env->fpscr; 613 bool vsx = !!(env->insns_flags2 & PPC2_VSX); 614 615 reg.id = KVM_REG_PPC_FPSCR; 616 reg.addr = (uintptr_t)&fpscr; 617 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 618 if (ret < 0) { 619 trace_kvm_failed_fpscr_set(strerror(errno)); 620 return ret; 621 } 622 623 for (i = 0; i < 32; i++) { 624 uint64_t vsr[2]; 625 uint64_t *fpr = cpu_fpr_ptr(&cpu->env, i); 626 uint64_t *vsrl = cpu_vsrl_ptr(&cpu->env, i); 627 628 #ifdef HOST_WORDS_BIGENDIAN 629 vsr[0] = float64_val(*fpr); 630 vsr[1] = *vsrl; 631 #else 632 vsr[0] = *vsrl; 633 vsr[1] = float64_val(*fpr); 634 #endif 635 reg.addr = (uintptr_t) &vsr; 636 reg.id = vsx ? KVM_REG_PPC_VSR(i) : KVM_REG_PPC_FPR(i); 637 638 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 639 if (ret < 0) { 640 trace_kvm_failed_fp_set(vsx ? "VSR" : "FPR", i, 641 strerror(errno)); 642 return ret; 643 } 644 } 645 } 646 647 if (env->insns_flags & PPC_ALTIVEC) { 648 reg.id = KVM_REG_PPC_VSCR; 649 reg.addr = (uintptr_t)&env->vscr; 650 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 651 if (ret < 0) { 652 trace_kvm_failed_vscr_set(strerror(errno)); 653 return ret; 654 } 655 656 for (i = 0; i < 32; i++) { 657 reg.id = KVM_REG_PPC_VR(i); 658 reg.addr = (uintptr_t)cpu_avr_ptr(env, i); 659 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 660 if (ret < 0) { 661 trace_kvm_failed_vr_set(i, strerror(errno)); 662 return ret; 663 } 664 } 665 } 666 667 return 0; 668 } 669 670 static int kvm_get_fp(CPUState *cs) 671 { 672 PowerPCCPU *cpu = POWERPC_CPU(cs); 673 CPUPPCState *env = &cpu->env; 674 struct kvm_one_reg reg; 675 int i; 676 int ret; 677 678 if (env->insns_flags & PPC_FLOAT) { 679 uint64_t fpscr; 680 bool vsx = !!(env->insns_flags2 & PPC2_VSX); 681 682 reg.id = KVM_REG_PPC_FPSCR; 683 reg.addr = (uintptr_t)&fpscr; 684 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 685 if (ret < 0) { 686 trace_kvm_failed_fpscr_get(strerror(errno)); 687 return ret; 688 } else { 689 env->fpscr = fpscr; 690 } 691 692 for (i = 0; i < 32; i++) { 693 uint64_t vsr[2]; 694 uint64_t *fpr = cpu_fpr_ptr(&cpu->env, i); 695 uint64_t *vsrl = cpu_vsrl_ptr(&cpu->env, i); 696 697 reg.addr = (uintptr_t) &vsr; 698 reg.id = vsx ? KVM_REG_PPC_VSR(i) : KVM_REG_PPC_FPR(i); 699 700 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 701 if (ret < 0) { 702 trace_kvm_failed_fp_get(vsx ? "VSR" : "FPR", i, 703 strerror(errno)); 704 return ret; 705 } else { 706 #ifdef HOST_WORDS_BIGENDIAN 707 *fpr = vsr[0]; 708 if (vsx) { 709 *vsrl = vsr[1]; 710 } 711 #else 712 *fpr = vsr[1]; 713 if (vsx) { 714 *vsrl = vsr[0]; 715 } 716 #endif 717 } 718 } 719 } 720 721 if (env->insns_flags & PPC_ALTIVEC) { 722 reg.id = KVM_REG_PPC_VSCR; 723 reg.addr = (uintptr_t)&env->vscr; 724 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 725 if (ret < 0) { 726 trace_kvm_failed_vscr_get(strerror(errno)); 727 return ret; 728 } 729 730 for (i = 0; i < 32; i++) { 731 reg.id = KVM_REG_PPC_VR(i); 732 reg.addr = (uintptr_t)cpu_avr_ptr(env, i); 733 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 734 if (ret < 0) { 735 trace_kvm_failed_vr_get(i, strerror(errno)); 736 return ret; 737 } 738 } 739 } 740 741 return 0; 742 } 743 744 #if defined(TARGET_PPC64) 745 static int kvm_get_vpa(CPUState *cs) 746 { 747 PowerPCCPU *cpu = POWERPC_CPU(cs); 748 SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu); 749 struct kvm_one_reg reg; 750 int ret; 751 752 reg.id = KVM_REG_PPC_VPA_ADDR; 753 reg.addr = (uintptr_t)&spapr_cpu->vpa_addr; 754 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 755 if (ret < 0) { 756 trace_kvm_failed_vpa_addr_get(strerror(errno)); 757 return ret; 758 } 759 760 assert((uintptr_t)&spapr_cpu->slb_shadow_size 761 == ((uintptr_t)&spapr_cpu->slb_shadow_addr + 8)); 762 reg.id = KVM_REG_PPC_VPA_SLB; 763 reg.addr = (uintptr_t)&spapr_cpu->slb_shadow_addr; 764 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 765 if (ret < 0) { 766 trace_kvm_failed_slb_get(strerror(errno)); 767 return ret; 768 } 769 770 assert((uintptr_t)&spapr_cpu->dtl_size 771 == ((uintptr_t)&spapr_cpu->dtl_addr + 8)); 772 reg.id = KVM_REG_PPC_VPA_DTL; 773 reg.addr = (uintptr_t)&spapr_cpu->dtl_addr; 774 ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); 775 if (ret < 0) { 776 trace_kvm_failed_dtl_get(strerror(errno)); 777 return ret; 778 } 779 780 return 0; 781 } 782 783 static int kvm_put_vpa(CPUState *cs) 784 { 785 PowerPCCPU *cpu = POWERPC_CPU(cs); 786 SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu); 787 struct kvm_one_reg reg; 788 int ret; 789 790 /* 791 * SLB shadow or DTL can't be registered unless a master VPA is 792 * registered. That means when restoring state, if a VPA *is* 793 * registered, we need to set that up first. If not, we need to 794 * deregister the others before deregistering the master VPA 795 */ 796 assert(spapr_cpu->vpa_addr 797 || !(spapr_cpu->slb_shadow_addr || spapr_cpu->dtl_addr)); 798 799 if (spapr_cpu->vpa_addr) { 800 reg.id = KVM_REG_PPC_VPA_ADDR; 801 reg.addr = (uintptr_t)&spapr_cpu->vpa_addr; 802 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 803 if (ret < 0) { 804 trace_kvm_failed_vpa_addr_set(strerror(errno)); 805 return ret; 806 } 807 } 808 809 assert((uintptr_t)&spapr_cpu->slb_shadow_size 810 == ((uintptr_t)&spapr_cpu->slb_shadow_addr + 8)); 811 reg.id = KVM_REG_PPC_VPA_SLB; 812 reg.addr = (uintptr_t)&spapr_cpu->slb_shadow_addr; 813 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 814 if (ret < 0) { 815 trace_kvm_failed_slb_set(strerror(errno)); 816 return ret; 817 } 818 819 assert((uintptr_t)&spapr_cpu->dtl_size 820 == ((uintptr_t)&spapr_cpu->dtl_addr + 8)); 821 reg.id = KVM_REG_PPC_VPA_DTL; 822 reg.addr = (uintptr_t)&spapr_cpu->dtl_addr; 823 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 824 if (ret < 0) { 825 trace_kvm_failed_dtl_set(strerror(errno)); 826 return ret; 827 } 828 829 if (!spapr_cpu->vpa_addr) { 830 reg.id = KVM_REG_PPC_VPA_ADDR; 831 reg.addr = (uintptr_t)&spapr_cpu->vpa_addr; 832 ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 833 if (ret < 0) { 834 trace_kvm_failed_null_vpa_addr_set(strerror(errno)); 835 return ret; 836 } 837 } 838 839 return 0; 840 } 841 #endif /* TARGET_PPC64 */ 842 843 int kvmppc_put_books_sregs(PowerPCCPU *cpu) 844 { 845 CPUPPCState *env = &cpu->env; 846 struct kvm_sregs sregs; 847 int i; 848 849 sregs.pvr = env->spr[SPR_PVR]; 850 851 if (cpu->vhyp) { 852 PPCVirtualHypervisorClass *vhc = 853 PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp); 854 sregs.u.s.sdr1 = vhc->encode_hpt_for_kvm_pr(cpu->vhyp); 855 } else { 856 sregs.u.s.sdr1 = env->spr[SPR_SDR1]; 857 } 858 859 /* Sync SLB */ 860 #ifdef TARGET_PPC64 861 for (i = 0; i < ARRAY_SIZE(env->slb); i++) { 862 sregs.u.s.ppc64.slb[i].slbe = env->slb[i].esid; 863 if (env->slb[i].esid & SLB_ESID_V) { 864 sregs.u.s.ppc64.slb[i].slbe |= i; 865 } 866 sregs.u.s.ppc64.slb[i].slbv = env->slb[i].vsid; 867 } 868 #endif 869 870 /* Sync SRs */ 871 for (i = 0; i < 16; i++) { 872 sregs.u.s.ppc32.sr[i] = env->sr[i]; 873 } 874 875 /* Sync BATs */ 876 for (i = 0; i < 8; i++) { 877 /* Beware. We have to swap upper and lower bits here */ 878 sregs.u.s.ppc32.dbat[i] = ((uint64_t)env->DBAT[0][i] << 32) 879 | env->DBAT[1][i]; 880 sregs.u.s.ppc32.ibat[i] = ((uint64_t)env->IBAT[0][i] << 32) 881 | env->IBAT[1][i]; 882 } 883 884 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_SREGS, &sregs); 885 } 886 887 int kvm_arch_put_registers(CPUState *cs, int level) 888 { 889 PowerPCCPU *cpu = POWERPC_CPU(cs); 890 CPUPPCState *env = &cpu->env; 891 struct kvm_regs regs; 892 int ret; 893 int i; 894 895 ret = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s); 896 if (ret < 0) { 897 return ret; 898 } 899 900 regs.ctr = env->ctr; 901 regs.lr = env->lr; 902 regs.xer = cpu_read_xer(env); 903 regs.msr = env->msr; 904 regs.pc = env->nip; 905 906 regs.srr0 = env->spr[SPR_SRR0]; 907 regs.srr1 = env->spr[SPR_SRR1]; 908 909 regs.sprg0 = env->spr[SPR_SPRG0]; 910 regs.sprg1 = env->spr[SPR_SPRG1]; 911 regs.sprg2 = env->spr[SPR_SPRG2]; 912 regs.sprg3 = env->spr[SPR_SPRG3]; 913 regs.sprg4 = env->spr[SPR_SPRG4]; 914 regs.sprg5 = env->spr[SPR_SPRG5]; 915 regs.sprg6 = env->spr[SPR_SPRG6]; 916 regs.sprg7 = env->spr[SPR_SPRG7]; 917 918 regs.pid = env->spr[SPR_BOOKE_PID]; 919 920 for (i = 0; i < 32; i++) { 921 regs.gpr[i] = env->gpr[i]; 922 } 923 924 regs.cr = 0; 925 for (i = 0; i < 8; i++) { 926 regs.cr |= (env->crf[i] & 15) << (4 * (7 - i)); 927 } 928 929 ret = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s); 930 if (ret < 0) { 931 return ret; 932 } 933 934 kvm_put_fp(cs); 935 936 if (env->tlb_dirty) { 937 kvm_sw_tlb_put(cpu); 938 env->tlb_dirty = false; 939 } 940 941 if (cap_segstate && (level >= KVM_PUT_RESET_STATE)) { 942 ret = kvmppc_put_books_sregs(cpu); 943 if (ret < 0) { 944 return ret; 945 } 946 } 947 948 if (cap_hior && (level >= KVM_PUT_RESET_STATE)) { 949 kvm_put_one_spr(cs, KVM_REG_PPC_HIOR, SPR_HIOR); 950 } 951 952 if (cap_one_reg) { 953 int i; 954 955 /* 956 * We deliberately ignore errors here, for kernels which have 957 * the ONE_REG calls, but don't support the specific 958 * registers, there's a reasonable chance things will still 959 * work, at least until we try to migrate. 960 */ 961 for (i = 0; i < 1024; i++) { 962 uint64_t id = env->spr_cb[i].one_reg_id; 963 964 if (id != 0) { 965 kvm_put_one_spr(cs, id, i); 966 } 967 } 968 969 #ifdef TARGET_PPC64 970 if (msr_ts) { 971 for (i = 0; i < ARRAY_SIZE(env->tm_gpr); i++) { 972 kvm_set_one_reg(cs, KVM_REG_PPC_TM_GPR(i), &env->tm_gpr[i]); 973 } 974 for (i = 0; i < ARRAY_SIZE(env->tm_vsr); i++) { 975 kvm_set_one_reg(cs, KVM_REG_PPC_TM_VSR(i), &env->tm_vsr[i]); 976 } 977 kvm_set_one_reg(cs, KVM_REG_PPC_TM_CR, &env->tm_cr); 978 kvm_set_one_reg(cs, KVM_REG_PPC_TM_LR, &env->tm_lr); 979 kvm_set_one_reg(cs, KVM_REG_PPC_TM_CTR, &env->tm_ctr); 980 kvm_set_one_reg(cs, KVM_REG_PPC_TM_FPSCR, &env->tm_fpscr); 981 kvm_set_one_reg(cs, KVM_REG_PPC_TM_AMR, &env->tm_amr); 982 kvm_set_one_reg(cs, KVM_REG_PPC_TM_PPR, &env->tm_ppr); 983 kvm_set_one_reg(cs, KVM_REG_PPC_TM_VRSAVE, &env->tm_vrsave); 984 kvm_set_one_reg(cs, KVM_REG_PPC_TM_VSCR, &env->tm_vscr); 985 kvm_set_one_reg(cs, KVM_REG_PPC_TM_DSCR, &env->tm_dscr); 986 kvm_set_one_reg(cs, KVM_REG_PPC_TM_TAR, &env->tm_tar); 987 } 988 989 if (cap_papr) { 990 if (kvm_put_vpa(cs) < 0) { 991 trace_kvm_failed_put_vpa(); 992 } 993 } 994 995 kvm_set_one_reg(cs, KVM_REG_PPC_TB_OFFSET, &env->tb_env->tb_offset); 996 997 if (level > KVM_PUT_RUNTIME_STATE) { 998 kvm_put_one_spr(cs, KVM_REG_PPC_DPDES, SPR_DPDES); 999 } 1000 #endif /* TARGET_PPC64 */ 1001 } 1002 1003 return ret; 1004 } 1005 1006 static void kvm_sync_excp(CPUPPCState *env, int vector, int ivor) 1007 { 1008 env->excp_vectors[vector] = env->spr[ivor] + env->spr[SPR_BOOKE_IVPR]; 1009 } 1010 1011 static int kvmppc_get_booke_sregs(PowerPCCPU *cpu) 1012 { 1013 CPUPPCState *env = &cpu->env; 1014 struct kvm_sregs sregs; 1015 int ret; 1016 1017 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS, &sregs); 1018 if (ret < 0) { 1019 return ret; 1020 } 1021 1022 if (sregs.u.e.features & KVM_SREGS_E_BASE) { 1023 env->spr[SPR_BOOKE_CSRR0] = sregs.u.e.csrr0; 1024 env->spr[SPR_BOOKE_CSRR1] = sregs.u.e.csrr1; 1025 env->spr[SPR_BOOKE_ESR] = sregs.u.e.esr; 1026 env->spr[SPR_BOOKE_DEAR] = sregs.u.e.dear; 1027 env->spr[SPR_BOOKE_MCSR] = sregs.u.e.mcsr; 1028 env->spr[SPR_BOOKE_TSR] = sregs.u.e.tsr; 1029 env->spr[SPR_BOOKE_TCR] = sregs.u.e.tcr; 1030 env->spr[SPR_DECR] = sregs.u.e.dec; 1031 env->spr[SPR_TBL] = sregs.u.e.tb & 0xffffffff; 1032 env->spr[SPR_TBU] = sregs.u.e.tb >> 32; 1033 env->spr[SPR_VRSAVE] = sregs.u.e.vrsave; 1034 } 1035 1036 if (sregs.u.e.features & KVM_SREGS_E_ARCH206) { 1037 env->spr[SPR_BOOKE_PIR] = sregs.u.e.pir; 1038 env->spr[SPR_BOOKE_MCSRR0] = sregs.u.e.mcsrr0; 1039 env->spr[SPR_BOOKE_MCSRR1] = sregs.u.e.mcsrr1; 1040 env->spr[SPR_BOOKE_DECAR] = sregs.u.e.decar; 1041 env->spr[SPR_BOOKE_IVPR] = sregs.u.e.ivpr; 1042 } 1043 1044 if (sregs.u.e.features & KVM_SREGS_E_64) { 1045 env->spr[SPR_BOOKE_EPCR] = sregs.u.e.epcr; 1046 } 1047 1048 if (sregs.u.e.features & KVM_SREGS_E_SPRG8) { 1049 env->spr[SPR_BOOKE_SPRG8] = sregs.u.e.sprg8; 1050 } 1051 1052 if (sregs.u.e.features & KVM_SREGS_E_IVOR) { 1053 env->spr[SPR_BOOKE_IVOR0] = sregs.u.e.ivor_low[0]; 1054 kvm_sync_excp(env, POWERPC_EXCP_CRITICAL, SPR_BOOKE_IVOR0); 1055 env->spr[SPR_BOOKE_IVOR1] = sregs.u.e.ivor_low[1]; 1056 kvm_sync_excp(env, POWERPC_EXCP_MCHECK, SPR_BOOKE_IVOR1); 1057 env->spr[SPR_BOOKE_IVOR2] = sregs.u.e.ivor_low[2]; 1058 kvm_sync_excp(env, POWERPC_EXCP_DSI, SPR_BOOKE_IVOR2); 1059 env->spr[SPR_BOOKE_IVOR3] = sregs.u.e.ivor_low[3]; 1060 kvm_sync_excp(env, POWERPC_EXCP_ISI, SPR_BOOKE_IVOR3); 1061 env->spr[SPR_BOOKE_IVOR4] = sregs.u.e.ivor_low[4]; 1062 kvm_sync_excp(env, POWERPC_EXCP_EXTERNAL, SPR_BOOKE_IVOR4); 1063 env->spr[SPR_BOOKE_IVOR5] = sregs.u.e.ivor_low[5]; 1064 kvm_sync_excp(env, POWERPC_EXCP_ALIGN, SPR_BOOKE_IVOR5); 1065 env->spr[SPR_BOOKE_IVOR6] = sregs.u.e.ivor_low[6]; 1066 kvm_sync_excp(env, POWERPC_EXCP_PROGRAM, SPR_BOOKE_IVOR6); 1067 env->spr[SPR_BOOKE_IVOR7] = sregs.u.e.ivor_low[7]; 1068 kvm_sync_excp(env, POWERPC_EXCP_FPU, SPR_BOOKE_IVOR7); 1069 env->spr[SPR_BOOKE_IVOR8] = sregs.u.e.ivor_low[8]; 1070 kvm_sync_excp(env, POWERPC_EXCP_SYSCALL, SPR_BOOKE_IVOR8); 1071 env->spr[SPR_BOOKE_IVOR9] = sregs.u.e.ivor_low[9]; 1072 kvm_sync_excp(env, POWERPC_EXCP_APU, SPR_BOOKE_IVOR9); 1073 env->spr[SPR_BOOKE_IVOR10] = sregs.u.e.ivor_low[10]; 1074 kvm_sync_excp(env, POWERPC_EXCP_DECR, SPR_BOOKE_IVOR10); 1075 env->spr[SPR_BOOKE_IVOR11] = sregs.u.e.ivor_low[11]; 1076 kvm_sync_excp(env, POWERPC_EXCP_FIT, SPR_BOOKE_IVOR11); 1077 env->spr[SPR_BOOKE_IVOR12] = sregs.u.e.ivor_low[12]; 1078 kvm_sync_excp(env, POWERPC_EXCP_WDT, SPR_BOOKE_IVOR12); 1079 env->spr[SPR_BOOKE_IVOR13] = sregs.u.e.ivor_low[13]; 1080 kvm_sync_excp(env, POWERPC_EXCP_DTLB, SPR_BOOKE_IVOR13); 1081 env->spr[SPR_BOOKE_IVOR14] = sregs.u.e.ivor_low[14]; 1082 kvm_sync_excp(env, POWERPC_EXCP_ITLB, SPR_BOOKE_IVOR14); 1083 env->spr[SPR_BOOKE_IVOR15] = sregs.u.e.ivor_low[15]; 1084 kvm_sync_excp(env, POWERPC_EXCP_DEBUG, SPR_BOOKE_IVOR15); 1085 1086 if (sregs.u.e.features & KVM_SREGS_E_SPE) { 1087 env->spr[SPR_BOOKE_IVOR32] = sregs.u.e.ivor_high[0]; 1088 kvm_sync_excp(env, POWERPC_EXCP_SPEU, SPR_BOOKE_IVOR32); 1089 env->spr[SPR_BOOKE_IVOR33] = sregs.u.e.ivor_high[1]; 1090 kvm_sync_excp(env, POWERPC_EXCP_EFPDI, SPR_BOOKE_IVOR33); 1091 env->spr[SPR_BOOKE_IVOR34] = sregs.u.e.ivor_high[2]; 1092 kvm_sync_excp(env, POWERPC_EXCP_EFPRI, SPR_BOOKE_IVOR34); 1093 } 1094 1095 if (sregs.u.e.features & KVM_SREGS_E_PM) { 1096 env->spr[SPR_BOOKE_IVOR35] = sregs.u.e.ivor_high[3]; 1097 kvm_sync_excp(env, POWERPC_EXCP_EPERFM, SPR_BOOKE_IVOR35); 1098 } 1099 1100 if (sregs.u.e.features & KVM_SREGS_E_PC) { 1101 env->spr[SPR_BOOKE_IVOR36] = sregs.u.e.ivor_high[4]; 1102 kvm_sync_excp(env, POWERPC_EXCP_DOORI, SPR_BOOKE_IVOR36); 1103 env->spr[SPR_BOOKE_IVOR37] = sregs.u.e.ivor_high[5]; 1104 kvm_sync_excp(env, POWERPC_EXCP_DOORCI, SPR_BOOKE_IVOR37); 1105 } 1106 } 1107 1108 if (sregs.u.e.features & KVM_SREGS_E_ARCH206_MMU) { 1109 env->spr[SPR_BOOKE_MAS0] = sregs.u.e.mas0; 1110 env->spr[SPR_BOOKE_MAS1] = sregs.u.e.mas1; 1111 env->spr[SPR_BOOKE_MAS2] = sregs.u.e.mas2; 1112 env->spr[SPR_BOOKE_MAS3] = sregs.u.e.mas7_3 & 0xffffffff; 1113 env->spr[SPR_BOOKE_MAS4] = sregs.u.e.mas4; 1114 env->spr[SPR_BOOKE_MAS6] = sregs.u.e.mas6; 1115 env->spr[SPR_BOOKE_MAS7] = sregs.u.e.mas7_3 >> 32; 1116 env->spr[SPR_MMUCFG] = sregs.u.e.mmucfg; 1117 env->spr[SPR_BOOKE_TLB0CFG] = sregs.u.e.tlbcfg[0]; 1118 env->spr[SPR_BOOKE_TLB1CFG] = sregs.u.e.tlbcfg[1]; 1119 } 1120 1121 if (sregs.u.e.features & KVM_SREGS_EXP) { 1122 env->spr[SPR_BOOKE_EPR] = sregs.u.e.epr; 1123 } 1124 1125 if (sregs.u.e.features & KVM_SREGS_E_PD) { 1126 env->spr[SPR_BOOKE_EPLC] = sregs.u.e.eplc; 1127 env->spr[SPR_BOOKE_EPSC] = sregs.u.e.epsc; 1128 } 1129 1130 if (sregs.u.e.impl_id == KVM_SREGS_E_IMPL_FSL) { 1131 env->spr[SPR_E500_SVR] = sregs.u.e.impl.fsl.svr; 1132 env->spr[SPR_Exxx_MCAR] = sregs.u.e.impl.fsl.mcar; 1133 env->spr[SPR_HID0] = sregs.u.e.impl.fsl.hid0; 1134 1135 if (sregs.u.e.impl.fsl.features & KVM_SREGS_E_FSL_PIDn) { 1136 env->spr[SPR_BOOKE_PID1] = sregs.u.e.impl.fsl.pid1; 1137 env->spr[SPR_BOOKE_PID2] = sregs.u.e.impl.fsl.pid2; 1138 } 1139 } 1140 1141 return 0; 1142 } 1143 1144 static int kvmppc_get_books_sregs(PowerPCCPU *cpu) 1145 { 1146 CPUPPCState *env = &cpu->env; 1147 struct kvm_sregs sregs; 1148 int ret; 1149 int i; 1150 1151 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS, &sregs); 1152 if (ret < 0) { 1153 return ret; 1154 } 1155 1156 if (!cpu->vhyp) { 1157 ppc_store_sdr1(env, sregs.u.s.sdr1); 1158 } 1159 1160 /* Sync SLB */ 1161 #ifdef TARGET_PPC64 1162 /* 1163 * The packed SLB array we get from KVM_GET_SREGS only contains 1164 * information about valid entries. So we flush our internal copy 1165 * to get rid of stale ones, then put all valid SLB entries back 1166 * in. 1167 */ 1168 memset(env->slb, 0, sizeof(env->slb)); 1169 for (i = 0; i < ARRAY_SIZE(env->slb); i++) { 1170 target_ulong rb = sregs.u.s.ppc64.slb[i].slbe; 1171 target_ulong rs = sregs.u.s.ppc64.slb[i].slbv; 1172 /* 1173 * Only restore valid entries 1174 */ 1175 if (rb & SLB_ESID_V) { 1176 ppc_store_slb(cpu, rb & 0xfff, rb & ~0xfffULL, rs); 1177 } 1178 } 1179 #endif 1180 1181 /* Sync SRs */ 1182 for (i = 0; i < 16; i++) { 1183 env->sr[i] = sregs.u.s.ppc32.sr[i]; 1184 } 1185 1186 /* Sync BATs */ 1187 for (i = 0; i < 8; i++) { 1188 env->DBAT[0][i] = sregs.u.s.ppc32.dbat[i] & 0xffffffff; 1189 env->DBAT[1][i] = sregs.u.s.ppc32.dbat[i] >> 32; 1190 env->IBAT[0][i] = sregs.u.s.ppc32.ibat[i] & 0xffffffff; 1191 env->IBAT[1][i] = sregs.u.s.ppc32.ibat[i] >> 32; 1192 } 1193 1194 return 0; 1195 } 1196 1197 int kvm_arch_get_registers(CPUState *cs) 1198 { 1199 PowerPCCPU *cpu = POWERPC_CPU(cs); 1200 CPUPPCState *env = &cpu->env; 1201 struct kvm_regs regs; 1202 uint32_t cr; 1203 int i, ret; 1204 1205 ret = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s); 1206 if (ret < 0) { 1207 return ret; 1208 } 1209 1210 cr = regs.cr; 1211 for (i = 7; i >= 0; i--) { 1212 env->crf[i] = cr & 15; 1213 cr >>= 4; 1214 } 1215 1216 env->ctr = regs.ctr; 1217 env->lr = regs.lr; 1218 cpu_write_xer(env, regs.xer); 1219 env->msr = regs.msr; 1220 env->nip = regs.pc; 1221 1222 env->spr[SPR_SRR0] = regs.srr0; 1223 env->spr[SPR_SRR1] = regs.srr1; 1224 1225 env->spr[SPR_SPRG0] = regs.sprg0; 1226 env->spr[SPR_SPRG1] = regs.sprg1; 1227 env->spr[SPR_SPRG2] = regs.sprg2; 1228 env->spr[SPR_SPRG3] = regs.sprg3; 1229 env->spr[SPR_SPRG4] = regs.sprg4; 1230 env->spr[SPR_SPRG5] = regs.sprg5; 1231 env->spr[SPR_SPRG6] = regs.sprg6; 1232 env->spr[SPR_SPRG7] = regs.sprg7; 1233 1234 env->spr[SPR_BOOKE_PID] = regs.pid; 1235 1236 for (i = 0; i < 32; i++) { 1237 env->gpr[i] = regs.gpr[i]; 1238 } 1239 1240 kvm_get_fp(cs); 1241 1242 if (cap_booke_sregs) { 1243 ret = kvmppc_get_booke_sregs(cpu); 1244 if (ret < 0) { 1245 return ret; 1246 } 1247 } 1248 1249 if (cap_segstate) { 1250 ret = kvmppc_get_books_sregs(cpu); 1251 if (ret < 0) { 1252 return ret; 1253 } 1254 } 1255 1256 if (cap_hior) { 1257 kvm_get_one_spr(cs, KVM_REG_PPC_HIOR, SPR_HIOR); 1258 } 1259 1260 if (cap_one_reg) { 1261 int i; 1262 1263 /* 1264 * We deliberately ignore errors here, for kernels which have 1265 * the ONE_REG calls, but don't support the specific 1266 * registers, there's a reasonable chance things will still 1267 * work, at least until we try to migrate. 1268 */ 1269 for (i = 0; i < 1024; i++) { 1270 uint64_t id = env->spr_cb[i].one_reg_id; 1271 1272 if (id != 0) { 1273 kvm_get_one_spr(cs, id, i); 1274 } 1275 } 1276 1277 #ifdef TARGET_PPC64 1278 if (msr_ts) { 1279 for (i = 0; i < ARRAY_SIZE(env->tm_gpr); i++) { 1280 kvm_get_one_reg(cs, KVM_REG_PPC_TM_GPR(i), &env->tm_gpr[i]); 1281 } 1282 for (i = 0; i < ARRAY_SIZE(env->tm_vsr); i++) { 1283 kvm_get_one_reg(cs, KVM_REG_PPC_TM_VSR(i), &env->tm_vsr[i]); 1284 } 1285 kvm_get_one_reg(cs, KVM_REG_PPC_TM_CR, &env->tm_cr); 1286 kvm_get_one_reg(cs, KVM_REG_PPC_TM_LR, &env->tm_lr); 1287 kvm_get_one_reg(cs, KVM_REG_PPC_TM_CTR, &env->tm_ctr); 1288 kvm_get_one_reg(cs, KVM_REG_PPC_TM_FPSCR, &env->tm_fpscr); 1289 kvm_get_one_reg(cs, KVM_REG_PPC_TM_AMR, &env->tm_amr); 1290 kvm_get_one_reg(cs, KVM_REG_PPC_TM_PPR, &env->tm_ppr); 1291 kvm_get_one_reg(cs, KVM_REG_PPC_TM_VRSAVE, &env->tm_vrsave); 1292 kvm_get_one_reg(cs, KVM_REG_PPC_TM_VSCR, &env->tm_vscr); 1293 kvm_get_one_reg(cs, KVM_REG_PPC_TM_DSCR, &env->tm_dscr); 1294 kvm_get_one_reg(cs, KVM_REG_PPC_TM_TAR, &env->tm_tar); 1295 } 1296 1297 if (cap_papr) { 1298 if (kvm_get_vpa(cs) < 0) { 1299 trace_kvm_failed_get_vpa(); 1300 } 1301 } 1302 1303 kvm_get_one_reg(cs, KVM_REG_PPC_TB_OFFSET, &env->tb_env->tb_offset); 1304 kvm_get_one_spr(cs, KVM_REG_PPC_DPDES, SPR_DPDES); 1305 #endif 1306 } 1307 1308 return 0; 1309 } 1310 1311 int kvmppc_set_interrupt(PowerPCCPU *cpu, int irq, int level) 1312 { 1313 unsigned virq = level ? KVM_INTERRUPT_SET_LEVEL : KVM_INTERRUPT_UNSET; 1314 1315 if (irq != PPC_INTERRUPT_EXT) { 1316 return 0; 1317 } 1318 1319 if (!kvm_enabled() || !cap_interrupt_unset) { 1320 return 0; 1321 } 1322 1323 kvm_vcpu_ioctl(CPU(cpu), KVM_INTERRUPT, &virq); 1324 1325 return 0; 1326 } 1327 1328 #if defined(TARGET_PPC64) 1329 #define PPC_INPUT_INT PPC970_INPUT_INT 1330 #else 1331 #define PPC_INPUT_INT PPC6xx_INPUT_INT 1332 #endif 1333 1334 void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run) 1335 { 1336 return; 1337 } 1338 1339 MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run) 1340 { 1341 return MEMTXATTRS_UNSPECIFIED; 1342 } 1343 1344 int kvm_arch_process_async_events(CPUState *cs) 1345 { 1346 return cs->halted; 1347 } 1348 1349 static int kvmppc_handle_halt(PowerPCCPU *cpu) 1350 { 1351 CPUState *cs = CPU(cpu); 1352 CPUPPCState *env = &cpu->env; 1353 1354 if (!(cs->interrupt_request & CPU_INTERRUPT_HARD) && (msr_ee)) { 1355 cs->halted = 1; 1356 cs->exception_index = EXCP_HLT; 1357 } 1358 1359 return 0; 1360 } 1361 1362 /* map dcr access to existing qemu dcr emulation */ 1363 static int kvmppc_handle_dcr_read(CPUPPCState *env, 1364 uint32_t dcrn, uint32_t *data) 1365 { 1366 if (ppc_dcr_read(env->dcr_env, dcrn, data) < 0) { 1367 fprintf(stderr, "Read to unhandled DCR (0x%x)\n", dcrn); 1368 } 1369 1370 return 0; 1371 } 1372 1373 static int kvmppc_handle_dcr_write(CPUPPCState *env, 1374 uint32_t dcrn, uint32_t data) 1375 { 1376 if (ppc_dcr_write(env->dcr_env, dcrn, data) < 0) { 1377 fprintf(stderr, "Write to unhandled DCR (0x%x)\n", dcrn); 1378 } 1379 1380 return 0; 1381 } 1382 1383 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 1384 { 1385 /* Mixed endian case is not handled */ 1386 uint32_t sc = debug_inst_opcode; 1387 1388 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1389 sizeof(sc), 0) || 1390 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&sc, sizeof(sc), 1)) { 1391 return -EINVAL; 1392 } 1393 1394 return 0; 1395 } 1396 1397 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 1398 { 1399 uint32_t sc; 1400 1401 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&sc, sizeof(sc), 0) || 1402 sc != debug_inst_opcode || 1403 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1404 sizeof(sc), 1)) { 1405 return -EINVAL; 1406 } 1407 1408 return 0; 1409 } 1410 1411 static int find_hw_breakpoint(target_ulong addr, int type) 1412 { 1413 int n; 1414 1415 assert((nb_hw_breakpoint + nb_hw_watchpoint) 1416 <= ARRAY_SIZE(hw_debug_points)); 1417 1418 for (n = 0; n < nb_hw_breakpoint + nb_hw_watchpoint; n++) { 1419 if (hw_debug_points[n].addr == addr && 1420 hw_debug_points[n].type == type) { 1421 return n; 1422 } 1423 } 1424 1425 return -1; 1426 } 1427 1428 static int find_hw_watchpoint(target_ulong addr, int *flag) 1429 { 1430 int n; 1431 1432 n = find_hw_breakpoint(addr, GDB_WATCHPOINT_ACCESS); 1433 if (n >= 0) { 1434 *flag = BP_MEM_ACCESS; 1435 return n; 1436 } 1437 1438 n = find_hw_breakpoint(addr, GDB_WATCHPOINT_WRITE); 1439 if (n >= 0) { 1440 *flag = BP_MEM_WRITE; 1441 return n; 1442 } 1443 1444 n = find_hw_breakpoint(addr, GDB_WATCHPOINT_READ); 1445 if (n >= 0) { 1446 *flag = BP_MEM_READ; 1447 return n; 1448 } 1449 1450 return -1; 1451 } 1452 1453 int kvm_arch_insert_hw_breakpoint(target_ulong addr, 1454 target_ulong len, int type) 1455 { 1456 if ((nb_hw_breakpoint + nb_hw_watchpoint) >= ARRAY_SIZE(hw_debug_points)) { 1457 return -ENOBUFS; 1458 } 1459 1460 hw_debug_points[nb_hw_breakpoint + nb_hw_watchpoint].addr = addr; 1461 hw_debug_points[nb_hw_breakpoint + nb_hw_watchpoint].type = type; 1462 1463 switch (type) { 1464 case GDB_BREAKPOINT_HW: 1465 if (nb_hw_breakpoint >= max_hw_breakpoint) { 1466 return -ENOBUFS; 1467 } 1468 1469 if (find_hw_breakpoint(addr, type) >= 0) { 1470 return -EEXIST; 1471 } 1472 1473 nb_hw_breakpoint++; 1474 break; 1475 1476 case GDB_WATCHPOINT_WRITE: 1477 case GDB_WATCHPOINT_READ: 1478 case GDB_WATCHPOINT_ACCESS: 1479 if (nb_hw_watchpoint >= max_hw_watchpoint) { 1480 return -ENOBUFS; 1481 } 1482 1483 if (find_hw_breakpoint(addr, type) >= 0) { 1484 return -EEXIST; 1485 } 1486 1487 nb_hw_watchpoint++; 1488 break; 1489 1490 default: 1491 return -ENOSYS; 1492 } 1493 1494 return 0; 1495 } 1496 1497 int kvm_arch_remove_hw_breakpoint(target_ulong addr, 1498 target_ulong len, int type) 1499 { 1500 int n; 1501 1502 n = find_hw_breakpoint(addr, type); 1503 if (n < 0) { 1504 return -ENOENT; 1505 } 1506 1507 switch (type) { 1508 case GDB_BREAKPOINT_HW: 1509 nb_hw_breakpoint--; 1510 break; 1511 1512 case GDB_WATCHPOINT_WRITE: 1513 case GDB_WATCHPOINT_READ: 1514 case GDB_WATCHPOINT_ACCESS: 1515 nb_hw_watchpoint--; 1516 break; 1517 1518 default: 1519 return -ENOSYS; 1520 } 1521 hw_debug_points[n] = hw_debug_points[nb_hw_breakpoint + nb_hw_watchpoint]; 1522 1523 return 0; 1524 } 1525 1526 void kvm_arch_remove_all_hw_breakpoints(void) 1527 { 1528 nb_hw_breakpoint = nb_hw_watchpoint = 0; 1529 } 1530 1531 void kvm_arch_update_guest_debug(CPUState *cs, struct kvm_guest_debug *dbg) 1532 { 1533 int n; 1534 1535 /* Software Breakpoint updates */ 1536 if (kvm_sw_breakpoints_active(cs)) { 1537 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; 1538 } 1539 1540 assert((nb_hw_breakpoint + nb_hw_watchpoint) 1541 <= ARRAY_SIZE(hw_debug_points)); 1542 assert((nb_hw_breakpoint + nb_hw_watchpoint) <= ARRAY_SIZE(dbg->arch.bp)); 1543 1544 if (nb_hw_breakpoint + nb_hw_watchpoint > 0) { 1545 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; 1546 memset(dbg->arch.bp, 0, sizeof(dbg->arch.bp)); 1547 for (n = 0; n < nb_hw_breakpoint + nb_hw_watchpoint; n++) { 1548 switch (hw_debug_points[n].type) { 1549 case GDB_BREAKPOINT_HW: 1550 dbg->arch.bp[n].type = KVMPPC_DEBUG_BREAKPOINT; 1551 break; 1552 case GDB_WATCHPOINT_WRITE: 1553 dbg->arch.bp[n].type = KVMPPC_DEBUG_WATCH_WRITE; 1554 break; 1555 case GDB_WATCHPOINT_READ: 1556 dbg->arch.bp[n].type = KVMPPC_DEBUG_WATCH_READ; 1557 break; 1558 case GDB_WATCHPOINT_ACCESS: 1559 dbg->arch.bp[n].type = KVMPPC_DEBUG_WATCH_WRITE | 1560 KVMPPC_DEBUG_WATCH_READ; 1561 break; 1562 default: 1563 cpu_abort(cs, "Unsupported breakpoint type\n"); 1564 } 1565 dbg->arch.bp[n].addr = hw_debug_points[n].addr; 1566 } 1567 } 1568 } 1569 1570 static int kvm_handle_hw_breakpoint(CPUState *cs, 1571 struct kvm_debug_exit_arch *arch_info) 1572 { 1573 int handle = 0; 1574 int n; 1575 int flag = 0; 1576 1577 if (nb_hw_breakpoint + nb_hw_watchpoint > 0) { 1578 if (arch_info->status & KVMPPC_DEBUG_BREAKPOINT) { 1579 n = find_hw_breakpoint(arch_info->address, GDB_BREAKPOINT_HW); 1580 if (n >= 0) { 1581 handle = 1; 1582 } 1583 } else if (arch_info->status & (KVMPPC_DEBUG_WATCH_READ | 1584 KVMPPC_DEBUG_WATCH_WRITE)) { 1585 n = find_hw_watchpoint(arch_info->address, &flag); 1586 if (n >= 0) { 1587 handle = 1; 1588 cs->watchpoint_hit = &hw_watchpoint; 1589 hw_watchpoint.vaddr = hw_debug_points[n].addr; 1590 hw_watchpoint.flags = flag; 1591 } 1592 } 1593 } 1594 return handle; 1595 } 1596 1597 static int kvm_handle_singlestep(void) 1598 { 1599 return 1; 1600 } 1601 1602 static int kvm_handle_sw_breakpoint(void) 1603 { 1604 return 1; 1605 } 1606 1607 static int kvm_handle_debug(PowerPCCPU *cpu, struct kvm_run *run) 1608 { 1609 CPUState *cs = CPU(cpu); 1610 CPUPPCState *env = &cpu->env; 1611 struct kvm_debug_exit_arch *arch_info = &run->debug.arch; 1612 1613 if (cs->singlestep_enabled) { 1614 return kvm_handle_singlestep(); 1615 } 1616 1617 if (arch_info->status) { 1618 return kvm_handle_hw_breakpoint(cs, arch_info); 1619 } 1620 1621 if (kvm_find_sw_breakpoint(cs, arch_info->address)) { 1622 return kvm_handle_sw_breakpoint(); 1623 } 1624 1625 /* 1626 * QEMU is not able to handle debug exception, so inject 1627 * program exception to guest; 1628 * Yes program exception NOT debug exception !! 1629 * When QEMU is using debug resources then debug exception must 1630 * be always set. To achieve this we set MSR_DE and also set 1631 * MSRP_DEP so guest cannot change MSR_DE. 1632 * When emulating debug resource for guest we want guest 1633 * to control MSR_DE (enable/disable debug interrupt on need). 1634 * Supporting both configurations are NOT possible. 1635 * So the result is that we cannot share debug resources 1636 * between QEMU and Guest on BOOKE architecture. 1637 * In the current design QEMU gets the priority over guest, 1638 * this means that if QEMU is using debug resources then guest 1639 * cannot use them; 1640 * For software breakpoint QEMU uses a privileged instruction; 1641 * So there cannot be any reason that we are here for guest 1642 * set debug exception, only possibility is guest executed a 1643 * privileged / illegal instruction and that's why we are 1644 * injecting a program interrupt. 1645 */ 1646 cpu_synchronize_state(cs); 1647 /* 1648 * env->nip is PC, so increment this by 4 to use 1649 * ppc_cpu_do_interrupt(), which set srr0 = env->nip - 4. 1650 */ 1651 env->nip += 4; 1652 cs->exception_index = POWERPC_EXCP_PROGRAM; 1653 env->error_code = POWERPC_EXCP_INVAL; 1654 ppc_cpu_do_interrupt(cs); 1655 1656 return 0; 1657 } 1658 1659 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) 1660 { 1661 PowerPCCPU *cpu = POWERPC_CPU(cs); 1662 CPUPPCState *env = &cpu->env; 1663 int ret; 1664 1665 qemu_mutex_lock_iothread(); 1666 1667 switch (run->exit_reason) { 1668 case KVM_EXIT_DCR: 1669 if (run->dcr.is_write) { 1670 trace_kvm_handle_dcr_write(); 1671 ret = kvmppc_handle_dcr_write(env, run->dcr.dcrn, run->dcr.data); 1672 } else { 1673 trace_kvm_handle_dcr_read(); 1674 ret = kvmppc_handle_dcr_read(env, run->dcr.dcrn, &run->dcr.data); 1675 } 1676 break; 1677 case KVM_EXIT_HLT: 1678 trace_kvm_handle_halt(); 1679 ret = kvmppc_handle_halt(cpu); 1680 break; 1681 #if defined(TARGET_PPC64) 1682 case KVM_EXIT_PAPR_HCALL: 1683 trace_kvm_handle_papr_hcall(); 1684 run->papr_hcall.ret = spapr_hypercall(cpu, 1685 run->papr_hcall.nr, 1686 run->papr_hcall.args); 1687 ret = 0; 1688 break; 1689 #endif 1690 case KVM_EXIT_EPR: 1691 trace_kvm_handle_epr(); 1692 run->epr.epr = ldl_phys(cs->as, env->mpic_iack); 1693 ret = 0; 1694 break; 1695 case KVM_EXIT_WATCHDOG: 1696 trace_kvm_handle_watchdog_expiry(); 1697 watchdog_perform_action(); 1698 ret = 0; 1699 break; 1700 1701 case KVM_EXIT_DEBUG: 1702 trace_kvm_handle_debug_exception(); 1703 if (kvm_handle_debug(cpu, run)) { 1704 ret = EXCP_DEBUG; 1705 break; 1706 } 1707 /* re-enter, this exception was guest-internal */ 1708 ret = 0; 1709 break; 1710 1711 default: 1712 fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); 1713 ret = -1; 1714 break; 1715 } 1716 1717 qemu_mutex_unlock_iothread(); 1718 return ret; 1719 } 1720 1721 int kvmppc_or_tsr_bits(PowerPCCPU *cpu, uint32_t tsr_bits) 1722 { 1723 CPUState *cs = CPU(cpu); 1724 uint32_t bits = tsr_bits; 1725 struct kvm_one_reg reg = { 1726 .id = KVM_REG_PPC_OR_TSR, 1727 .addr = (uintptr_t) &bits, 1728 }; 1729 1730 return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 1731 } 1732 1733 int kvmppc_clear_tsr_bits(PowerPCCPU *cpu, uint32_t tsr_bits) 1734 { 1735 1736 CPUState *cs = CPU(cpu); 1737 uint32_t bits = tsr_bits; 1738 struct kvm_one_reg reg = { 1739 .id = KVM_REG_PPC_CLEAR_TSR, 1740 .addr = (uintptr_t) &bits, 1741 }; 1742 1743 return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 1744 } 1745 1746 int kvmppc_set_tcr(PowerPCCPU *cpu) 1747 { 1748 CPUState *cs = CPU(cpu); 1749 CPUPPCState *env = &cpu->env; 1750 uint32_t tcr = env->spr[SPR_BOOKE_TCR]; 1751 1752 struct kvm_one_reg reg = { 1753 .id = KVM_REG_PPC_TCR, 1754 .addr = (uintptr_t) &tcr, 1755 }; 1756 1757 return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); 1758 } 1759 1760 int kvmppc_booke_watchdog_enable(PowerPCCPU *cpu) 1761 { 1762 CPUState *cs = CPU(cpu); 1763 int ret; 1764 1765 if (!kvm_enabled()) { 1766 return -1; 1767 } 1768 1769 if (!cap_ppc_watchdog) { 1770 printf("warning: KVM does not support watchdog"); 1771 return -1; 1772 } 1773 1774 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_PPC_BOOKE_WATCHDOG, 0); 1775 if (ret < 0) { 1776 fprintf(stderr, "%s: couldn't enable KVM_CAP_PPC_BOOKE_WATCHDOG: %s\n", 1777 __func__, strerror(-ret)); 1778 return ret; 1779 } 1780 1781 return ret; 1782 } 1783 1784 static int read_cpuinfo(const char *field, char *value, int len) 1785 { 1786 FILE *f; 1787 int ret = -1; 1788 int field_len = strlen(field); 1789 char line[512]; 1790 1791 f = fopen("/proc/cpuinfo", "r"); 1792 if (!f) { 1793 return -1; 1794 } 1795 1796 do { 1797 if (!fgets(line, sizeof(line), f)) { 1798 break; 1799 } 1800 if (!strncmp(line, field, field_len)) { 1801 pstrcpy(value, len, line); 1802 ret = 0; 1803 break; 1804 } 1805 } while (*line); 1806 1807 fclose(f); 1808 1809 return ret; 1810 } 1811 1812 uint32_t kvmppc_get_tbfreq(void) 1813 { 1814 char line[512]; 1815 char *ns; 1816 uint32_t retval = NANOSECONDS_PER_SECOND; 1817 1818 if (read_cpuinfo("timebase", line, sizeof(line))) { 1819 return retval; 1820 } 1821 1822 ns = strchr(line, ':'); 1823 if (!ns) { 1824 return retval; 1825 } 1826 1827 ns++; 1828 1829 return atoi(ns); 1830 } 1831 1832 bool kvmppc_get_host_serial(char **value) 1833 { 1834 return g_file_get_contents("/proc/device-tree/system-id", value, NULL, 1835 NULL); 1836 } 1837 1838 bool kvmppc_get_host_model(char **value) 1839 { 1840 return g_file_get_contents("/proc/device-tree/model", value, NULL, NULL); 1841 } 1842 1843 /* Try to find a device tree node for a CPU with clock-frequency property */ 1844 static int kvmppc_find_cpu_dt(char *buf, int buf_len) 1845 { 1846 struct dirent *dirp; 1847 DIR *dp; 1848 1849 dp = opendir(PROC_DEVTREE_CPU); 1850 if (!dp) { 1851 printf("Can't open directory " PROC_DEVTREE_CPU "\n"); 1852 return -1; 1853 } 1854 1855 buf[0] = '\0'; 1856 while ((dirp = readdir(dp)) != NULL) { 1857 FILE *f; 1858 snprintf(buf, buf_len, "%s%s/clock-frequency", PROC_DEVTREE_CPU, 1859 dirp->d_name); 1860 f = fopen(buf, "r"); 1861 if (f) { 1862 snprintf(buf, buf_len, "%s%s", PROC_DEVTREE_CPU, dirp->d_name); 1863 fclose(f); 1864 break; 1865 } 1866 buf[0] = '\0'; 1867 } 1868 closedir(dp); 1869 if (buf[0] == '\0') { 1870 printf("Unknown host!\n"); 1871 return -1; 1872 } 1873 1874 return 0; 1875 } 1876 1877 static uint64_t kvmppc_read_int_dt(const char *filename) 1878 { 1879 union { 1880 uint32_t v32; 1881 uint64_t v64; 1882 } u; 1883 FILE *f; 1884 int len; 1885 1886 f = fopen(filename, "rb"); 1887 if (!f) { 1888 return -1; 1889 } 1890 1891 len = fread(&u, 1, sizeof(u), f); 1892 fclose(f); 1893 switch (len) { 1894 case 4: 1895 /* property is a 32-bit quantity */ 1896 return be32_to_cpu(u.v32); 1897 case 8: 1898 return be64_to_cpu(u.v64); 1899 } 1900 1901 return 0; 1902 } 1903 1904 /* 1905 * Read a CPU node property from the host device tree that's a single 1906 * integer (32-bit or 64-bit). Returns 0 if anything goes wrong 1907 * (can't find or open the property, or doesn't understand the format) 1908 */ 1909 static uint64_t kvmppc_read_int_cpu_dt(const char *propname) 1910 { 1911 char buf[PATH_MAX], *tmp; 1912 uint64_t val; 1913 1914 if (kvmppc_find_cpu_dt(buf, sizeof(buf))) { 1915 return -1; 1916 } 1917 1918 tmp = g_strdup_printf("%s/%s", buf, propname); 1919 val = kvmppc_read_int_dt(tmp); 1920 g_free(tmp); 1921 1922 return val; 1923 } 1924 1925 uint64_t kvmppc_get_clockfreq(void) 1926 { 1927 return kvmppc_read_int_cpu_dt("clock-frequency"); 1928 } 1929 1930 static int kvmppc_get_dec_bits(void) 1931 { 1932 int nr_bits = kvmppc_read_int_cpu_dt("ibm,dec-bits"); 1933 1934 if (nr_bits > 0) { 1935 return nr_bits; 1936 } 1937 return 0; 1938 } 1939 1940 static int kvmppc_get_pvinfo(CPUPPCState *env, struct kvm_ppc_pvinfo *pvinfo) 1941 { 1942 CPUState *cs = env_cpu(env); 1943 1944 if (kvm_vm_check_extension(cs->kvm_state, KVM_CAP_PPC_GET_PVINFO) && 1945 !kvm_vm_ioctl(cs->kvm_state, KVM_PPC_GET_PVINFO, pvinfo)) { 1946 return 0; 1947 } 1948 1949 return 1; 1950 } 1951 1952 int kvmppc_get_hasidle(CPUPPCState *env) 1953 { 1954 struct kvm_ppc_pvinfo pvinfo; 1955 1956 if (!kvmppc_get_pvinfo(env, &pvinfo) && 1957 (pvinfo.flags & KVM_PPC_PVINFO_FLAGS_EV_IDLE)) { 1958 return 1; 1959 } 1960 1961 return 0; 1962 } 1963 1964 int kvmppc_get_hypercall(CPUPPCState *env, uint8_t *buf, int buf_len) 1965 { 1966 uint32_t *hc = (uint32_t *)buf; 1967 struct kvm_ppc_pvinfo pvinfo; 1968 1969 if (!kvmppc_get_pvinfo(env, &pvinfo)) { 1970 memcpy(buf, pvinfo.hcall, buf_len); 1971 return 0; 1972 } 1973 1974 /* 1975 * Fallback to always fail hypercalls regardless of endianness: 1976 * 1977 * tdi 0,r0,72 (becomes b .+8 in wrong endian, nop in good endian) 1978 * li r3, -1 1979 * b .+8 (becomes nop in wrong endian) 1980 * bswap32(li r3, -1) 1981 */ 1982 1983 hc[0] = cpu_to_be32(0x08000048); 1984 hc[1] = cpu_to_be32(0x3860ffff); 1985 hc[2] = cpu_to_be32(0x48000008); 1986 hc[3] = cpu_to_be32(bswap32(0x3860ffff)); 1987 1988 return 1; 1989 } 1990 1991 static inline int kvmppc_enable_hcall(KVMState *s, target_ulong hcall) 1992 { 1993 return kvm_vm_enable_cap(s, KVM_CAP_PPC_ENABLE_HCALL, 0, hcall, 1); 1994 } 1995 1996 void kvmppc_enable_logical_ci_hcalls(void) 1997 { 1998 /* 1999 * FIXME: it would be nice if we could detect the cases where 2000 * we're using a device which requires the in kernel 2001 * implementation of these hcalls, but the kernel lacks them and 2002 * produce a warning. 2003 */ 2004 kvmppc_enable_hcall(kvm_state, H_LOGICAL_CI_LOAD); 2005 kvmppc_enable_hcall(kvm_state, H_LOGICAL_CI_STORE); 2006 } 2007 2008 void kvmppc_enable_set_mode_hcall(void) 2009 { 2010 kvmppc_enable_hcall(kvm_state, H_SET_MODE); 2011 } 2012 2013 void kvmppc_enable_clear_ref_mod_hcalls(void) 2014 { 2015 kvmppc_enable_hcall(kvm_state, H_CLEAR_REF); 2016 kvmppc_enable_hcall(kvm_state, H_CLEAR_MOD); 2017 } 2018 2019 void kvmppc_enable_h_page_init(void) 2020 { 2021 kvmppc_enable_hcall(kvm_state, H_PAGE_INIT); 2022 } 2023 2024 void kvmppc_set_papr(PowerPCCPU *cpu) 2025 { 2026 CPUState *cs = CPU(cpu); 2027 int ret; 2028 2029 if (!kvm_enabled()) { 2030 return; 2031 } 2032 2033 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_PPC_PAPR, 0); 2034 if (ret) { 2035 error_report("This vCPU type or KVM version does not support PAPR"); 2036 exit(1); 2037 } 2038 2039 /* 2040 * Update the capability flag so we sync the right information 2041 * with kvm 2042 */ 2043 cap_papr = 1; 2044 } 2045 2046 int kvmppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr) 2047 { 2048 return kvm_set_one_reg(CPU(cpu), KVM_REG_PPC_ARCH_COMPAT, &compat_pvr); 2049 } 2050 2051 void kvmppc_set_mpic_proxy(PowerPCCPU *cpu, int mpic_proxy) 2052 { 2053 CPUState *cs = CPU(cpu); 2054 int ret; 2055 2056 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_PPC_EPR, 0, mpic_proxy); 2057 if (ret && mpic_proxy) { 2058 error_report("This KVM version does not support EPR"); 2059 exit(1); 2060 } 2061 } 2062 2063 int kvmppc_smt_threads(void) 2064 { 2065 return cap_ppc_smt ? cap_ppc_smt : 1; 2066 } 2067 2068 int kvmppc_set_smt_threads(int smt) 2069 { 2070 int ret; 2071 2072 ret = kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_SMT, 0, smt, 0); 2073 if (!ret) { 2074 cap_ppc_smt = smt; 2075 } 2076 return ret; 2077 } 2078 2079 void kvmppc_error_append_smt_possible_hint(Error **errp_in) 2080 { 2081 int i; 2082 GString *g; 2083 char *s; 2084 2085 assert(kvm_enabled()); 2086 if (cap_ppc_smt_possible) { 2087 g = g_string_new("Available VSMT modes:"); 2088 for (i = 63; i >= 0; i--) { 2089 if ((1UL << i) & cap_ppc_smt_possible) { 2090 g_string_append_printf(g, " %lu", (1UL << i)); 2091 } 2092 } 2093 s = g_string_free(g, false); 2094 error_append_hint(errp_in, "%s.\n", s); 2095 g_free(s); 2096 } else { 2097 error_append_hint(errp_in, 2098 "This KVM seems to be too old to support VSMT.\n"); 2099 } 2100 } 2101 2102 2103 #ifdef TARGET_PPC64 2104 uint64_t kvmppc_rma_size(uint64_t current_size, unsigned int hash_shift) 2105 { 2106 struct kvm_ppc_smmu_info info; 2107 long rampagesize, best_page_shift; 2108 int i; 2109 2110 /* 2111 * Find the largest hardware supported page size that's less than 2112 * or equal to the (logical) backing page size of guest RAM 2113 */ 2114 kvm_get_smmu_info(&info, &error_fatal); 2115 rampagesize = qemu_minrampagesize(); 2116 best_page_shift = 0; 2117 2118 for (i = 0; i < KVM_PPC_PAGE_SIZES_MAX_SZ; i++) { 2119 struct kvm_ppc_one_seg_page_size *sps = &info.sps[i]; 2120 2121 if (!sps->page_shift) { 2122 continue; 2123 } 2124 2125 if ((sps->page_shift > best_page_shift) 2126 && ((1UL << sps->page_shift) <= rampagesize)) { 2127 best_page_shift = sps->page_shift; 2128 } 2129 } 2130 2131 return MIN(current_size, 2132 1ULL << (best_page_shift + hash_shift - 7)); 2133 } 2134 #endif 2135 2136 bool kvmppc_spapr_use_multitce(void) 2137 { 2138 return cap_spapr_multitce; 2139 } 2140 2141 int kvmppc_spapr_enable_inkernel_multitce(void) 2142 { 2143 int ret; 2144 2145 ret = kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_ENABLE_HCALL, 0, 2146 H_PUT_TCE_INDIRECT, 1); 2147 if (!ret) { 2148 ret = kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_ENABLE_HCALL, 0, 2149 H_STUFF_TCE, 1); 2150 } 2151 2152 return ret; 2153 } 2154 2155 void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t page_shift, 2156 uint64_t bus_offset, uint32_t nb_table, 2157 int *pfd, bool need_vfio) 2158 { 2159 long len; 2160 int fd; 2161 void *table; 2162 2163 /* 2164 * Must set fd to -1 so we don't try to munmap when called for 2165 * destroying the table, which the upper layers -will- do 2166 */ 2167 *pfd = -1; 2168 if (!cap_spapr_tce || (need_vfio && !cap_spapr_vfio)) { 2169 return NULL; 2170 } 2171 2172 if (cap_spapr_tce_64) { 2173 struct kvm_create_spapr_tce_64 args = { 2174 .liobn = liobn, 2175 .page_shift = page_shift, 2176 .offset = bus_offset >> page_shift, 2177 .size = nb_table, 2178 .flags = 0 2179 }; 2180 fd = kvm_vm_ioctl(kvm_state, KVM_CREATE_SPAPR_TCE_64, &args); 2181 if (fd < 0) { 2182 fprintf(stderr, 2183 "KVM: Failed to create TCE64 table for liobn 0x%x\n", 2184 liobn); 2185 return NULL; 2186 } 2187 } else if (cap_spapr_tce) { 2188 uint64_t window_size = (uint64_t) nb_table << page_shift; 2189 struct kvm_create_spapr_tce args = { 2190 .liobn = liobn, 2191 .window_size = window_size, 2192 }; 2193 if ((window_size != args.window_size) || bus_offset) { 2194 return NULL; 2195 } 2196 fd = kvm_vm_ioctl(kvm_state, KVM_CREATE_SPAPR_TCE, &args); 2197 if (fd < 0) { 2198 fprintf(stderr, "KVM: Failed to create TCE table for liobn 0x%x\n", 2199 liobn); 2200 return NULL; 2201 } 2202 } else { 2203 return NULL; 2204 } 2205 2206 len = nb_table * sizeof(uint64_t); 2207 /* FIXME: round this up to page size */ 2208 2209 table = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 2210 if (table == MAP_FAILED) { 2211 fprintf(stderr, "KVM: Failed to map TCE table for liobn 0x%x\n", 2212 liobn); 2213 close(fd); 2214 return NULL; 2215 } 2216 2217 *pfd = fd; 2218 return table; 2219 } 2220 2221 int kvmppc_remove_spapr_tce(void *table, int fd, uint32_t nb_table) 2222 { 2223 long len; 2224 2225 if (fd < 0) { 2226 return -1; 2227 } 2228 2229 len = nb_table * sizeof(uint64_t); 2230 if ((munmap(table, len) < 0) || 2231 (close(fd) < 0)) { 2232 fprintf(stderr, "KVM: Unexpected error removing TCE table: %s", 2233 strerror(errno)); 2234 /* Leak the table */ 2235 } 2236 2237 return 0; 2238 } 2239 2240 int kvmppc_reset_htab(int shift_hint) 2241 { 2242 uint32_t shift = shift_hint; 2243 2244 if (!kvm_enabled()) { 2245 /* Full emulation, tell caller to allocate htab itself */ 2246 return 0; 2247 } 2248 if (kvm_vm_check_extension(kvm_state, KVM_CAP_PPC_ALLOC_HTAB)) { 2249 int ret; 2250 ret = kvm_vm_ioctl(kvm_state, KVM_PPC_ALLOCATE_HTAB, &shift); 2251 if (ret == -ENOTTY) { 2252 /* 2253 * At least some versions of PR KVM advertise the 2254 * capability, but don't implement the ioctl(). Oops. 2255 * Return 0 so that we allocate the htab in qemu, as is 2256 * correct for PR. 2257 */ 2258 return 0; 2259 } else if (ret < 0) { 2260 return ret; 2261 } 2262 return shift; 2263 } 2264 2265 /* 2266 * We have a kernel that predates the htab reset calls. For PR 2267 * KVM, we need to allocate the htab ourselves, for an HV KVM of 2268 * this era, it has allocated a 16MB fixed size hash table 2269 * already. 2270 */ 2271 if (kvmppc_is_pr(kvm_state)) { 2272 /* PR - tell caller to allocate htab */ 2273 return 0; 2274 } else { 2275 /* HV - assume 16MB kernel allocated htab */ 2276 return 24; 2277 } 2278 } 2279 2280 static inline uint32_t mfpvr(void) 2281 { 2282 uint32_t pvr; 2283 2284 asm ("mfpvr %0" 2285 : "=r"(pvr)); 2286 return pvr; 2287 } 2288 2289 static void alter_insns(uint64_t *word, uint64_t flags, bool on) 2290 { 2291 if (on) { 2292 *word |= flags; 2293 } else { 2294 *word &= ~flags; 2295 } 2296 } 2297 2298 static void kvmppc_host_cpu_class_init(ObjectClass *oc, void *data) 2299 { 2300 PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc); 2301 uint32_t dcache_size = kvmppc_read_int_cpu_dt("d-cache-size"); 2302 uint32_t icache_size = kvmppc_read_int_cpu_dt("i-cache-size"); 2303 2304 /* Now fix up the class with information we can query from the host */ 2305 pcc->pvr = mfpvr(); 2306 2307 alter_insns(&pcc->insns_flags, PPC_ALTIVEC, 2308 qemu_getauxval(AT_HWCAP) & PPC_FEATURE_HAS_ALTIVEC); 2309 alter_insns(&pcc->insns_flags2, PPC2_VSX, 2310 qemu_getauxval(AT_HWCAP) & PPC_FEATURE_HAS_VSX); 2311 alter_insns(&pcc->insns_flags2, PPC2_DFP, 2312 qemu_getauxval(AT_HWCAP) & PPC_FEATURE_HAS_DFP); 2313 2314 if (dcache_size != -1) { 2315 pcc->l1_dcache_size = dcache_size; 2316 } 2317 2318 if (icache_size != -1) { 2319 pcc->l1_icache_size = icache_size; 2320 } 2321 2322 #if defined(TARGET_PPC64) 2323 pcc->radix_page_info = kvm_get_radix_page_info(); 2324 2325 if ((pcc->pvr & 0xffffff00) == CPU_POWERPC_POWER9_DD1) { 2326 /* 2327 * POWER9 DD1 has some bugs which make it not really ISA 3.00 2328 * compliant. More importantly, advertising ISA 3.00 2329 * architected mode may prevent guests from activating 2330 * necessary DD1 workarounds. 2331 */ 2332 pcc->pcr_supported &= ~(PCR_COMPAT_3_00 | PCR_COMPAT_2_07 2333 | PCR_COMPAT_2_06 | PCR_COMPAT_2_05); 2334 } 2335 #endif /* defined(TARGET_PPC64) */ 2336 } 2337 2338 bool kvmppc_has_cap_epr(void) 2339 { 2340 return cap_epr; 2341 } 2342 2343 bool kvmppc_has_cap_fixup_hcalls(void) 2344 { 2345 return cap_fixup_hcalls; 2346 } 2347 2348 bool kvmppc_has_cap_htm(void) 2349 { 2350 return cap_htm; 2351 } 2352 2353 bool kvmppc_has_cap_mmu_radix(void) 2354 { 2355 return cap_mmu_radix; 2356 } 2357 2358 bool kvmppc_has_cap_mmu_hash_v3(void) 2359 { 2360 return cap_mmu_hash_v3; 2361 } 2362 2363 static bool kvmppc_power8_host(void) 2364 { 2365 bool ret = false; 2366 #ifdef TARGET_PPC64 2367 { 2368 uint32_t base_pvr = CPU_POWERPC_POWER_SERVER_MASK & mfpvr(); 2369 ret = (base_pvr == CPU_POWERPC_POWER8E_BASE) || 2370 (base_pvr == CPU_POWERPC_POWER8NVL_BASE) || 2371 (base_pvr == CPU_POWERPC_POWER8_BASE); 2372 } 2373 #endif /* TARGET_PPC64 */ 2374 return ret; 2375 } 2376 2377 static int parse_cap_ppc_safe_cache(struct kvm_ppc_cpu_char c) 2378 { 2379 bool l1d_thread_priv_req = !kvmppc_power8_host(); 2380 2381 if (~c.behaviour & c.behaviour_mask & H_CPU_BEHAV_L1D_FLUSH_PR) { 2382 return 2; 2383 } else if ((!l1d_thread_priv_req || 2384 c.character & c.character_mask & H_CPU_CHAR_L1D_THREAD_PRIV) && 2385 (c.character & c.character_mask 2386 & (H_CPU_CHAR_L1D_FLUSH_ORI30 | H_CPU_CHAR_L1D_FLUSH_TRIG2))) { 2387 return 1; 2388 } 2389 2390 return 0; 2391 } 2392 2393 static int parse_cap_ppc_safe_bounds_check(struct kvm_ppc_cpu_char c) 2394 { 2395 if (~c.behaviour & c.behaviour_mask & H_CPU_BEHAV_BNDS_CHK_SPEC_BAR) { 2396 return 2; 2397 } else if (c.character & c.character_mask & H_CPU_CHAR_SPEC_BAR_ORI31) { 2398 return 1; 2399 } 2400 2401 return 0; 2402 } 2403 2404 static int parse_cap_ppc_safe_indirect_branch(struct kvm_ppc_cpu_char c) 2405 { 2406 if ((~c.behaviour & c.behaviour_mask & H_CPU_BEHAV_FLUSH_COUNT_CACHE) && 2407 (~c.character & c.character_mask & H_CPU_CHAR_CACHE_COUNT_DIS) && 2408 (~c.character & c.character_mask & H_CPU_CHAR_BCCTRL_SERIALISED)) { 2409 return SPAPR_CAP_FIXED_NA; 2410 } else if (c.behaviour & c.behaviour_mask & H_CPU_BEHAV_FLUSH_COUNT_CACHE) { 2411 return SPAPR_CAP_WORKAROUND; 2412 } else if (c.character & c.character_mask & H_CPU_CHAR_CACHE_COUNT_DIS) { 2413 return SPAPR_CAP_FIXED_CCD; 2414 } else if (c.character & c.character_mask & H_CPU_CHAR_BCCTRL_SERIALISED) { 2415 return SPAPR_CAP_FIXED_IBS; 2416 } 2417 2418 return 0; 2419 } 2420 2421 static int parse_cap_ppc_count_cache_flush_assist(struct kvm_ppc_cpu_char c) 2422 { 2423 if (c.character & c.character_mask & H_CPU_CHAR_BCCTR_FLUSH_ASSIST) { 2424 return 1; 2425 } 2426 return 0; 2427 } 2428 2429 bool kvmppc_has_cap_xive(void) 2430 { 2431 return cap_xive; 2432 } 2433 2434 static void kvmppc_get_cpu_characteristics(KVMState *s) 2435 { 2436 struct kvm_ppc_cpu_char c; 2437 int ret; 2438 2439 /* Assume broken */ 2440 cap_ppc_safe_cache = 0; 2441 cap_ppc_safe_bounds_check = 0; 2442 cap_ppc_safe_indirect_branch = 0; 2443 2444 ret = kvm_vm_check_extension(s, KVM_CAP_PPC_GET_CPU_CHAR); 2445 if (!ret) { 2446 return; 2447 } 2448 ret = kvm_vm_ioctl(s, KVM_PPC_GET_CPU_CHAR, &c); 2449 if (ret < 0) { 2450 return; 2451 } 2452 2453 cap_ppc_safe_cache = parse_cap_ppc_safe_cache(c); 2454 cap_ppc_safe_bounds_check = parse_cap_ppc_safe_bounds_check(c); 2455 cap_ppc_safe_indirect_branch = parse_cap_ppc_safe_indirect_branch(c); 2456 cap_ppc_count_cache_flush_assist = 2457 parse_cap_ppc_count_cache_flush_assist(c); 2458 } 2459 2460 int kvmppc_get_cap_safe_cache(void) 2461 { 2462 return cap_ppc_safe_cache; 2463 } 2464 2465 int kvmppc_get_cap_safe_bounds_check(void) 2466 { 2467 return cap_ppc_safe_bounds_check; 2468 } 2469 2470 int kvmppc_get_cap_safe_indirect_branch(void) 2471 { 2472 return cap_ppc_safe_indirect_branch; 2473 } 2474 2475 int kvmppc_get_cap_count_cache_flush_assist(void) 2476 { 2477 return cap_ppc_count_cache_flush_assist; 2478 } 2479 2480 bool kvmppc_has_cap_nested_kvm_hv(void) 2481 { 2482 return !!cap_ppc_nested_kvm_hv; 2483 } 2484 2485 int kvmppc_set_cap_nested_kvm_hv(int enable) 2486 { 2487 return kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_NESTED_HV, 0, enable); 2488 } 2489 2490 bool kvmppc_has_cap_spapr_vfio(void) 2491 { 2492 return cap_spapr_vfio; 2493 } 2494 2495 int kvmppc_get_cap_large_decr(void) 2496 { 2497 return cap_large_decr; 2498 } 2499 2500 int kvmppc_enable_cap_large_decr(PowerPCCPU *cpu, int enable) 2501 { 2502 CPUState *cs = CPU(cpu); 2503 uint64_t lpcr; 2504 2505 kvm_get_one_reg(cs, KVM_REG_PPC_LPCR_64, &lpcr); 2506 /* Do we need to modify the LPCR? */ 2507 if (!!(lpcr & LPCR_LD) != !!enable) { 2508 if (enable) { 2509 lpcr |= LPCR_LD; 2510 } else { 2511 lpcr &= ~LPCR_LD; 2512 } 2513 kvm_set_one_reg(cs, KVM_REG_PPC_LPCR_64, &lpcr); 2514 kvm_get_one_reg(cs, KVM_REG_PPC_LPCR_64, &lpcr); 2515 2516 if (!!(lpcr & LPCR_LD) != !!enable) { 2517 return -1; 2518 } 2519 } 2520 2521 return 0; 2522 } 2523 2524 PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void) 2525 { 2526 uint32_t host_pvr = mfpvr(); 2527 PowerPCCPUClass *pvr_pcc; 2528 2529 pvr_pcc = ppc_cpu_class_by_pvr(host_pvr); 2530 if (pvr_pcc == NULL) { 2531 pvr_pcc = ppc_cpu_class_by_pvr_mask(host_pvr); 2532 } 2533 2534 return pvr_pcc; 2535 } 2536 2537 static void pseries_machine_class_fixup(ObjectClass *oc, void *opaque) 2538 { 2539 MachineClass *mc = MACHINE_CLASS(oc); 2540 2541 mc->default_cpu_type = TYPE_HOST_POWERPC_CPU; 2542 } 2543 2544 static int kvm_ppc_register_host_cpu_type(void) 2545 { 2546 TypeInfo type_info = { 2547 .name = TYPE_HOST_POWERPC_CPU, 2548 .class_init = kvmppc_host_cpu_class_init, 2549 }; 2550 PowerPCCPUClass *pvr_pcc; 2551 ObjectClass *oc; 2552 DeviceClass *dc; 2553 int i; 2554 2555 pvr_pcc = kvm_ppc_get_host_cpu_class(); 2556 if (pvr_pcc == NULL) { 2557 return -1; 2558 } 2559 type_info.parent = object_class_get_name(OBJECT_CLASS(pvr_pcc)); 2560 type_register(&type_info); 2561 /* override TCG default cpu type with 'host' cpu model */ 2562 object_class_foreach(pseries_machine_class_fixup, TYPE_SPAPR_MACHINE, 2563 false, NULL); 2564 2565 oc = object_class_by_name(type_info.name); 2566 g_assert(oc); 2567 2568 /* 2569 * Update generic CPU family class alias (e.g. on a POWER8NVL host, 2570 * we want "POWER8" to be a "family" alias that points to the current 2571 * host CPU type, too) 2572 */ 2573 dc = DEVICE_CLASS(ppc_cpu_get_family_class(pvr_pcc)); 2574 for (i = 0; ppc_cpu_aliases[i].alias != NULL; i++) { 2575 if (strcasecmp(ppc_cpu_aliases[i].alias, dc->desc) == 0) { 2576 char *suffix; 2577 2578 ppc_cpu_aliases[i].model = g_strdup(object_class_get_name(oc)); 2579 suffix = strstr(ppc_cpu_aliases[i].model, POWERPC_CPU_TYPE_SUFFIX); 2580 if (suffix) { 2581 *suffix = 0; 2582 } 2583 break; 2584 } 2585 } 2586 2587 return 0; 2588 } 2589 2590 int kvmppc_define_rtas_kernel_token(uint32_t token, const char *function) 2591 { 2592 struct kvm_rtas_token_args args = { 2593 .token = token, 2594 }; 2595 2596 if (!kvm_check_extension(kvm_state, KVM_CAP_PPC_RTAS)) { 2597 return -ENOENT; 2598 } 2599 2600 strncpy(args.name, function, sizeof(args.name) - 1); 2601 2602 return kvm_vm_ioctl(kvm_state, KVM_PPC_RTAS_DEFINE_TOKEN, &args); 2603 } 2604 2605 int kvmppc_get_htab_fd(bool write, uint64_t index, Error **errp) 2606 { 2607 struct kvm_get_htab_fd s = { 2608 .flags = write ? KVM_GET_HTAB_WRITE : 0, 2609 .start_index = index, 2610 }; 2611 int ret; 2612 2613 if (!cap_htab_fd) { 2614 error_setg(errp, "KVM version doesn't support %s the HPT", 2615 write ? "writing" : "reading"); 2616 return -ENOTSUP; 2617 } 2618 2619 ret = kvm_vm_ioctl(kvm_state, KVM_PPC_GET_HTAB_FD, &s); 2620 if (ret < 0) { 2621 error_setg(errp, "Unable to open fd for %s HPT %s KVM: %s", 2622 write ? "writing" : "reading", write ? "to" : "from", 2623 strerror(errno)); 2624 return -errno; 2625 } 2626 2627 return ret; 2628 } 2629 2630 int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, int64_t max_ns) 2631 { 2632 int64_t starttime = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); 2633 uint8_t buf[bufsize]; 2634 ssize_t rc; 2635 2636 do { 2637 rc = read(fd, buf, bufsize); 2638 if (rc < 0) { 2639 fprintf(stderr, "Error reading data from KVM HTAB fd: %s\n", 2640 strerror(errno)); 2641 return rc; 2642 } else if (rc) { 2643 uint8_t *buffer = buf; 2644 ssize_t n = rc; 2645 while (n) { 2646 struct kvm_get_htab_header *head = 2647 (struct kvm_get_htab_header *) buffer; 2648 size_t chunksize = sizeof(*head) + 2649 HASH_PTE_SIZE_64 * head->n_valid; 2650 2651 qemu_put_be32(f, head->index); 2652 qemu_put_be16(f, head->n_valid); 2653 qemu_put_be16(f, head->n_invalid); 2654 qemu_put_buffer(f, (void *)(head + 1), 2655 HASH_PTE_SIZE_64 * head->n_valid); 2656 2657 buffer += chunksize; 2658 n -= chunksize; 2659 } 2660 } 2661 } while ((rc != 0) 2662 && ((max_ns < 0) || 2663 ((qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - starttime) < max_ns))); 2664 2665 return (rc == 0) ? 1 : 0; 2666 } 2667 2668 int kvmppc_load_htab_chunk(QEMUFile *f, int fd, uint32_t index, 2669 uint16_t n_valid, uint16_t n_invalid) 2670 { 2671 struct kvm_get_htab_header *buf; 2672 size_t chunksize = sizeof(*buf) + n_valid * HASH_PTE_SIZE_64; 2673 ssize_t rc; 2674 2675 buf = alloca(chunksize); 2676 buf->index = index; 2677 buf->n_valid = n_valid; 2678 buf->n_invalid = n_invalid; 2679 2680 qemu_get_buffer(f, (void *)(buf + 1), HASH_PTE_SIZE_64 * n_valid); 2681 2682 rc = write(fd, buf, chunksize); 2683 if (rc < 0) { 2684 fprintf(stderr, "Error writing KVM hash table: %s\n", 2685 strerror(errno)); 2686 return rc; 2687 } 2688 if (rc != chunksize) { 2689 /* We should never get a short write on a single chunk */ 2690 fprintf(stderr, "Short write, restoring KVM hash table\n"); 2691 return -1; 2692 } 2693 return 0; 2694 } 2695 2696 bool kvm_arch_stop_on_emulation_error(CPUState *cpu) 2697 { 2698 return true; 2699 } 2700 2701 void kvm_arch_init_irq_routing(KVMState *s) 2702 { 2703 } 2704 2705 void kvmppc_read_hptes(ppc_hash_pte64_t *hptes, hwaddr ptex, int n) 2706 { 2707 int fd, rc; 2708 int i; 2709 2710 fd = kvmppc_get_htab_fd(false, ptex, &error_abort); 2711 2712 i = 0; 2713 while (i < n) { 2714 struct kvm_get_htab_header *hdr; 2715 int m = n < HPTES_PER_GROUP ? n : HPTES_PER_GROUP; 2716 char buf[sizeof(*hdr) + m * HASH_PTE_SIZE_64]; 2717 2718 rc = read(fd, buf, sizeof(buf)); 2719 if (rc < 0) { 2720 hw_error("kvmppc_read_hptes: Unable to read HPTEs"); 2721 } 2722 2723 hdr = (struct kvm_get_htab_header *)buf; 2724 while ((i < n) && ((char *)hdr < (buf + rc))) { 2725 int invalid = hdr->n_invalid, valid = hdr->n_valid; 2726 2727 if (hdr->index != (ptex + i)) { 2728 hw_error("kvmppc_read_hptes: Unexpected HPTE index %"PRIu32 2729 " != (%"HWADDR_PRIu" + %d", hdr->index, ptex, i); 2730 } 2731 2732 if (n - i < valid) { 2733 valid = n - i; 2734 } 2735 memcpy(hptes + i, hdr + 1, HASH_PTE_SIZE_64 * valid); 2736 i += valid; 2737 2738 if ((n - i) < invalid) { 2739 invalid = n - i; 2740 } 2741 memset(hptes + i, 0, invalid * HASH_PTE_SIZE_64); 2742 i += invalid; 2743 2744 hdr = (struct kvm_get_htab_header *) 2745 ((char *)(hdr + 1) + HASH_PTE_SIZE_64 * hdr->n_valid); 2746 } 2747 } 2748 2749 close(fd); 2750 } 2751 2752 void kvmppc_write_hpte(hwaddr ptex, uint64_t pte0, uint64_t pte1) 2753 { 2754 int fd, rc; 2755 struct { 2756 struct kvm_get_htab_header hdr; 2757 uint64_t pte0; 2758 uint64_t pte1; 2759 } buf; 2760 2761 fd = kvmppc_get_htab_fd(true, 0 /* Ignored */, &error_abort); 2762 2763 buf.hdr.n_valid = 1; 2764 buf.hdr.n_invalid = 0; 2765 buf.hdr.index = ptex; 2766 buf.pte0 = cpu_to_be64(pte0); 2767 buf.pte1 = cpu_to_be64(pte1); 2768 2769 rc = write(fd, &buf, sizeof(buf)); 2770 if (rc != sizeof(buf)) { 2771 hw_error("kvmppc_write_hpte: Unable to update KVM HPT"); 2772 } 2773 close(fd); 2774 } 2775 2776 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, 2777 uint64_t address, uint32_t data, PCIDevice *dev) 2778 { 2779 return 0; 2780 } 2781 2782 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, 2783 int vector, PCIDevice *dev) 2784 { 2785 return 0; 2786 } 2787 2788 int kvm_arch_release_virq_post(int virq) 2789 { 2790 return 0; 2791 } 2792 2793 int kvm_arch_msi_data_to_gsi(uint32_t data) 2794 { 2795 return data & 0xffff; 2796 } 2797 2798 int kvmppc_enable_hwrng(void) 2799 { 2800 if (!kvm_enabled() || !kvm_check_extension(kvm_state, KVM_CAP_PPC_HWRNG)) { 2801 return -1; 2802 } 2803 2804 return kvmppc_enable_hcall(kvm_state, H_RANDOM); 2805 } 2806 2807 void kvmppc_check_papr_resize_hpt(Error **errp) 2808 { 2809 if (!kvm_enabled()) { 2810 return; /* No KVM, we're good */ 2811 } 2812 2813 if (cap_resize_hpt) { 2814 return; /* Kernel has explicit support, we're good */ 2815 } 2816 2817 /* Otherwise fallback on looking for PR KVM */ 2818 if (kvmppc_is_pr(kvm_state)) { 2819 return; 2820 } 2821 2822 error_setg(errp, 2823 "Hash page table resizing not available with this KVM version"); 2824 } 2825 2826 int kvmppc_resize_hpt_prepare(PowerPCCPU *cpu, target_ulong flags, int shift) 2827 { 2828 CPUState *cs = CPU(cpu); 2829 struct kvm_ppc_resize_hpt rhpt = { 2830 .flags = flags, 2831 .shift = shift, 2832 }; 2833 2834 if (!cap_resize_hpt) { 2835 return -ENOSYS; 2836 } 2837 2838 return kvm_vm_ioctl(cs->kvm_state, KVM_PPC_RESIZE_HPT_PREPARE, &rhpt); 2839 } 2840 2841 int kvmppc_resize_hpt_commit(PowerPCCPU *cpu, target_ulong flags, int shift) 2842 { 2843 CPUState *cs = CPU(cpu); 2844 struct kvm_ppc_resize_hpt rhpt = { 2845 .flags = flags, 2846 .shift = shift, 2847 }; 2848 2849 if (!cap_resize_hpt) { 2850 return -ENOSYS; 2851 } 2852 2853 return kvm_vm_ioctl(cs->kvm_state, KVM_PPC_RESIZE_HPT_COMMIT, &rhpt); 2854 } 2855 2856 /* 2857 * This is a helper function to detect a post migration scenario 2858 * in which a guest, running as KVM-HV, freezes in cpu_post_load because 2859 * the guest kernel can't handle a PVR value other than the actual host 2860 * PVR in KVM_SET_SREGS, even if pvr_match() returns true. 2861 * 2862 * If we don't have cap_ppc_pvr_compat and we're not running in PR 2863 * (so, we're HV), return true. The workaround itself is done in 2864 * cpu_post_load. 2865 * 2866 * The order here is important: we'll only check for KVM PR as a 2867 * fallback if the guest kernel can't handle the situation itself. 2868 * We need to avoid as much as possible querying the running KVM type 2869 * in QEMU level. 2870 */ 2871 bool kvmppc_pvr_workaround_required(PowerPCCPU *cpu) 2872 { 2873 CPUState *cs = CPU(cpu); 2874 2875 if (!kvm_enabled()) { 2876 return false; 2877 } 2878 2879 if (cap_ppc_pvr_compat) { 2880 return false; 2881 } 2882 2883 return !kvmppc_is_pr(cs->kvm_state); 2884 } 2885 2886 void kvmppc_set_reg_ppc_online(PowerPCCPU *cpu, unsigned int online) 2887 { 2888 CPUState *cs = CPU(cpu); 2889 2890 if (kvm_enabled()) { 2891 kvm_set_one_reg(cs, KVM_REG_PPC_ONLINE, &online); 2892 } 2893 } 2894 2895 void kvmppc_set_reg_tb_offset(PowerPCCPU *cpu, int64_t tb_offset) 2896 { 2897 CPUState *cs = CPU(cpu); 2898 2899 if (kvm_enabled()) { 2900 kvm_set_one_reg(cs, KVM_REG_PPC_TB_OFFSET, &tb_offset); 2901 } 2902 } 2903