1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 4 * Copyright IBM Corp. 2007 5 * 6 * Authors: Hollis Blanchard <hollisb@us.ibm.com> 7 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> 8 */ 9 10 #include <linux/errno.h> 11 #include <linux/err.h> 12 #include <linux/kvm_host.h> 13 #include <linux/vmalloc.h> 14 #include <linux/hrtimer.h> 15 #include <linux/sched/signal.h> 16 #include <linux/fs.h> 17 #include <linux/slab.h> 18 #include <linux/file.h> 19 #include <linux/module.h> 20 #include <linux/irqbypass.h> 21 #include <linux/kvm_irqfd.h> 22 #include <asm/cputable.h> 23 #include <linux/uaccess.h> 24 #include <asm/kvm_ppc.h> 25 #include <asm/cputhreads.h> 26 #include <asm/irqflags.h> 27 #include <asm/iommu.h> 28 #include <asm/switch_to.h> 29 #include <asm/xive.h> 30 #ifdef CONFIG_PPC_PSERIES 31 #include <asm/hvcall.h> 32 #include <asm/plpar_wrappers.h> 33 #endif 34 #include <asm/ultravisor.h> 35 36 #include "timing.h" 37 #include "irq.h" 38 #include "../mm/mmu_decl.h" 39 40 #define CREATE_TRACE_POINTS 41 #include "trace.h" 42 43 struct kvmppc_ops *kvmppc_hv_ops; 44 EXPORT_SYMBOL_GPL(kvmppc_hv_ops); 45 struct kvmppc_ops *kvmppc_pr_ops; 46 EXPORT_SYMBOL_GPL(kvmppc_pr_ops); 47 48 49 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) 50 { 51 return !!(v->arch.pending_exceptions) || kvm_request_pending(v); 52 } 53 54 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu) 55 { 56 return kvm_arch_vcpu_runnable(vcpu); 57 } 58 59 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) 60 { 61 return false; 62 } 63 64 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) 65 { 66 return 1; 67 } 68 69 /* 70 * Common checks before entering the guest world. Call with interrupts 71 * disabled. 72 * 73 * returns: 74 * 75 * == 1 if we're ready to go into guest state 76 * <= 0 if we need to go back to the host with return value 77 */ 78 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) 79 { 80 int r; 81 82 WARN_ON(irqs_disabled()); 83 hard_irq_disable(); 84 85 while (true) { 86 if (need_resched()) { 87 local_irq_enable(); 88 cond_resched(); 89 hard_irq_disable(); 90 continue; 91 } 92 93 if (signal_pending(current)) { 94 kvmppc_account_exit(vcpu, SIGNAL_EXITS); 95 vcpu->run->exit_reason = KVM_EXIT_INTR; 96 r = -EINTR; 97 break; 98 } 99 100 vcpu->mode = IN_GUEST_MODE; 101 102 /* 103 * Reading vcpu->requests must happen after setting vcpu->mode, 104 * so we don't miss a request because the requester sees 105 * OUTSIDE_GUEST_MODE and assumes we'll be checking requests 106 * before next entering the guest (and thus doesn't IPI). 107 * This also orders the write to mode from any reads 108 * to the page tables done while the VCPU is running. 109 * Please see the comment in kvm_flush_remote_tlbs. 110 */ 111 smp_mb(); 112 113 if (kvm_request_pending(vcpu)) { 114 /* Make sure we process requests preemptable */ 115 local_irq_enable(); 116 trace_kvm_check_requests(vcpu); 117 r = kvmppc_core_check_requests(vcpu); 118 hard_irq_disable(); 119 if (r > 0) 120 continue; 121 break; 122 } 123 124 if (kvmppc_core_prepare_to_enter(vcpu)) { 125 /* interrupts got enabled in between, so we 126 are back at square 1 */ 127 continue; 128 } 129 130 guest_enter_irqoff(); 131 return 1; 132 } 133 134 /* return to host */ 135 local_irq_enable(); 136 return r; 137 } 138 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter); 139 140 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE) 141 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu) 142 { 143 struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared; 144 int i; 145 146 shared->sprg0 = swab64(shared->sprg0); 147 shared->sprg1 = swab64(shared->sprg1); 148 shared->sprg2 = swab64(shared->sprg2); 149 shared->sprg3 = swab64(shared->sprg3); 150 shared->srr0 = swab64(shared->srr0); 151 shared->srr1 = swab64(shared->srr1); 152 shared->dar = swab64(shared->dar); 153 shared->msr = swab64(shared->msr); 154 shared->dsisr = swab32(shared->dsisr); 155 shared->int_pending = swab32(shared->int_pending); 156 for (i = 0; i < ARRAY_SIZE(shared->sr); i++) 157 shared->sr[i] = swab32(shared->sr[i]); 158 } 159 #endif 160 161 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) 162 { 163 int nr = kvmppc_get_gpr(vcpu, 11); 164 int r; 165 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3); 166 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4); 167 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5); 168 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6); 169 unsigned long r2 = 0; 170 171 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) { 172 /* 32 bit mode */ 173 param1 &= 0xffffffff; 174 param2 &= 0xffffffff; 175 param3 &= 0xffffffff; 176 param4 &= 0xffffffff; 177 } 178 179 switch (nr) { 180 case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE): 181 { 182 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE) 183 /* Book3S can be little endian, find it out here */ 184 int shared_big_endian = true; 185 if (vcpu->arch.intr_msr & MSR_LE) 186 shared_big_endian = false; 187 if (shared_big_endian != vcpu->arch.shared_big_endian) 188 kvmppc_swab_shared(vcpu); 189 vcpu->arch.shared_big_endian = shared_big_endian; 190 #endif 191 192 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) { 193 /* 194 * Older versions of the Linux magic page code had 195 * a bug where they would map their trampoline code 196 * NX. If that's the case, remove !PR NX capability. 197 */ 198 vcpu->arch.disable_kernel_nx = true; 199 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 200 } 201 202 vcpu->arch.magic_page_pa = param1 & ~0xfffULL; 203 vcpu->arch.magic_page_ea = param2 & ~0xfffULL; 204 205 #ifdef CONFIG_PPC_64K_PAGES 206 /* 207 * Make sure our 4k magic page is in the same window of a 64k 208 * page within the guest and within the host's page. 209 */ 210 if ((vcpu->arch.magic_page_pa & 0xf000) != 211 ((ulong)vcpu->arch.shared & 0xf000)) { 212 void *old_shared = vcpu->arch.shared; 213 ulong shared = (ulong)vcpu->arch.shared; 214 void *new_shared; 215 216 shared &= PAGE_MASK; 217 shared |= vcpu->arch.magic_page_pa & 0xf000; 218 new_shared = (void*)shared; 219 memcpy(new_shared, old_shared, 0x1000); 220 vcpu->arch.shared = new_shared; 221 } 222 #endif 223 224 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7; 225 226 r = EV_SUCCESS; 227 break; 228 } 229 case KVM_HCALL_TOKEN(KVM_HC_FEATURES): 230 r = EV_SUCCESS; 231 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2) 232 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE); 233 #endif 234 235 /* Second return value is in r4 */ 236 break; 237 case EV_HCALL_TOKEN(EV_IDLE): 238 r = EV_SUCCESS; 239 kvm_vcpu_block(vcpu); 240 kvm_clear_request(KVM_REQ_UNHALT, vcpu); 241 break; 242 default: 243 r = EV_UNIMPLEMENTED; 244 break; 245 } 246 247 kvmppc_set_gpr(vcpu, 4, r2); 248 249 return r; 250 } 251 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv); 252 253 int kvmppc_sanity_check(struct kvm_vcpu *vcpu) 254 { 255 int r = false; 256 257 /* We have to know what CPU to virtualize */ 258 if (!vcpu->arch.pvr) 259 goto out; 260 261 /* PAPR only works with book3s_64 */ 262 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled) 263 goto out; 264 265 /* HV KVM can only do PAPR mode for now */ 266 if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm)) 267 goto out; 268 269 #ifdef CONFIG_KVM_BOOKE_HV 270 if (!cpu_has_feature(CPU_FTR_EMB_HV)) 271 goto out; 272 #endif 273 274 r = true; 275 276 out: 277 vcpu->arch.sane = r; 278 return r ? 0 : -EINVAL; 279 } 280 EXPORT_SYMBOL_GPL(kvmppc_sanity_check); 281 282 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) 283 { 284 enum emulation_result er; 285 int r; 286 287 er = kvmppc_emulate_loadstore(vcpu); 288 switch (er) { 289 case EMULATE_DONE: 290 /* Future optimization: only reload non-volatiles if they were 291 * actually modified. */ 292 r = RESUME_GUEST_NV; 293 break; 294 case EMULATE_AGAIN: 295 r = RESUME_GUEST; 296 break; 297 case EMULATE_DO_MMIO: 298 run->exit_reason = KVM_EXIT_MMIO; 299 /* We must reload nonvolatiles because "update" load/store 300 * instructions modify register state. */ 301 /* Future optimization: only reload non-volatiles if they were 302 * actually modified. */ 303 r = RESUME_HOST_NV; 304 break; 305 case EMULATE_FAIL: 306 { 307 u32 last_inst; 308 309 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); 310 /* XXX Deliver Program interrupt to guest. */ 311 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst); 312 r = RESUME_HOST; 313 break; 314 } 315 default: 316 WARN_ON(1); 317 r = RESUME_GUEST; 318 } 319 320 return r; 321 } 322 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio); 323 324 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, 325 bool data) 326 { 327 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK; 328 struct kvmppc_pte pte; 329 int r = -EINVAL; 330 331 vcpu->stat.st++; 332 333 if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr) 334 r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr, 335 size); 336 337 if ((!r) || (r == -EAGAIN)) 338 return r; 339 340 r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST, 341 XLATE_WRITE, &pte); 342 if (r < 0) 343 return r; 344 345 *eaddr = pte.raddr; 346 347 if (!pte.may_write) 348 return -EPERM; 349 350 /* Magic page override */ 351 if (kvmppc_supports_magic_page(vcpu) && mp_pa && 352 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) && 353 !(kvmppc_get_msr(vcpu) & MSR_PR)) { 354 void *magic = vcpu->arch.shared; 355 magic += pte.eaddr & 0xfff; 356 memcpy(magic, ptr, size); 357 return EMULATE_DONE; 358 } 359 360 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size)) 361 return EMULATE_DO_MMIO; 362 363 return EMULATE_DONE; 364 } 365 EXPORT_SYMBOL_GPL(kvmppc_st); 366 367 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, 368 bool data) 369 { 370 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK; 371 struct kvmppc_pte pte; 372 int rc = -EINVAL; 373 374 vcpu->stat.ld++; 375 376 if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr) 377 rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr, 378 size); 379 380 if ((!rc) || (rc == -EAGAIN)) 381 return rc; 382 383 rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST, 384 XLATE_READ, &pte); 385 if (rc) 386 return rc; 387 388 *eaddr = pte.raddr; 389 390 if (!pte.may_read) 391 return -EPERM; 392 393 if (!data && !pte.may_execute) 394 return -ENOEXEC; 395 396 /* Magic page override */ 397 if (kvmppc_supports_magic_page(vcpu) && mp_pa && 398 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) && 399 !(kvmppc_get_msr(vcpu) & MSR_PR)) { 400 void *magic = vcpu->arch.shared; 401 magic += pte.eaddr & 0xfff; 402 memcpy(ptr, magic, size); 403 return EMULATE_DONE; 404 } 405 406 if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size)) 407 return EMULATE_DO_MMIO; 408 409 return EMULATE_DONE; 410 } 411 EXPORT_SYMBOL_GPL(kvmppc_ld); 412 413 int kvm_arch_hardware_enable(void) 414 { 415 return 0; 416 } 417 418 int kvm_arch_hardware_setup(void *opaque) 419 { 420 return 0; 421 } 422 423 int kvm_arch_check_processor_compat(void *opaque) 424 { 425 return kvmppc_core_check_processor_compat(); 426 } 427 428 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) 429 { 430 struct kvmppc_ops *kvm_ops = NULL; 431 /* 432 * if we have both HV and PR enabled, default is HV 433 */ 434 if (type == 0) { 435 if (kvmppc_hv_ops) 436 kvm_ops = kvmppc_hv_ops; 437 else 438 kvm_ops = kvmppc_pr_ops; 439 if (!kvm_ops) 440 goto err_out; 441 } else if (type == KVM_VM_PPC_HV) { 442 if (!kvmppc_hv_ops) 443 goto err_out; 444 kvm_ops = kvmppc_hv_ops; 445 } else if (type == KVM_VM_PPC_PR) { 446 if (!kvmppc_pr_ops) 447 goto err_out; 448 kvm_ops = kvmppc_pr_ops; 449 } else 450 goto err_out; 451 452 if (kvm_ops->owner && !try_module_get(kvm_ops->owner)) 453 return -ENOENT; 454 455 kvm->arch.kvm_ops = kvm_ops; 456 return kvmppc_core_init_vm(kvm); 457 err_out: 458 return -EINVAL; 459 } 460 461 void kvm_arch_destroy_vm(struct kvm *kvm) 462 { 463 unsigned int i; 464 struct kvm_vcpu *vcpu; 465 466 #ifdef CONFIG_KVM_XICS 467 /* 468 * We call kick_all_cpus_sync() to ensure that all 469 * CPUs have executed any pending IPIs before we 470 * continue and free VCPUs structures below. 471 */ 472 if (is_kvmppc_hv_enabled(kvm)) 473 kick_all_cpus_sync(); 474 #endif 475 476 kvm_for_each_vcpu(i, vcpu, kvm) 477 kvm_vcpu_destroy(vcpu); 478 479 mutex_lock(&kvm->lock); 480 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) 481 kvm->vcpus[i] = NULL; 482 483 atomic_set(&kvm->online_vcpus, 0); 484 485 kvmppc_core_destroy_vm(kvm); 486 487 mutex_unlock(&kvm->lock); 488 489 /* drop the module reference */ 490 module_put(kvm->arch.kvm_ops->owner); 491 } 492 493 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) 494 { 495 int r; 496 /* Assume we're using HV mode when the HV module is loaded */ 497 int hv_enabled = kvmppc_hv_ops ? 1 : 0; 498 499 if (kvm) { 500 /* 501 * Hooray - we know which VM type we're running on. Depend on 502 * that rather than the guess above. 503 */ 504 hv_enabled = is_kvmppc_hv_enabled(kvm); 505 } 506 507 switch (ext) { 508 #ifdef CONFIG_BOOKE 509 case KVM_CAP_PPC_BOOKE_SREGS: 510 case KVM_CAP_PPC_BOOKE_WATCHDOG: 511 case KVM_CAP_PPC_EPR: 512 #else 513 case KVM_CAP_PPC_SEGSTATE: 514 case KVM_CAP_PPC_HIOR: 515 case KVM_CAP_PPC_PAPR: 516 #endif 517 case KVM_CAP_PPC_UNSET_IRQ: 518 case KVM_CAP_PPC_IRQ_LEVEL: 519 case KVM_CAP_ENABLE_CAP: 520 case KVM_CAP_ONE_REG: 521 case KVM_CAP_IOEVENTFD: 522 case KVM_CAP_DEVICE_CTRL: 523 case KVM_CAP_IMMEDIATE_EXIT: 524 case KVM_CAP_SET_GUEST_DEBUG: 525 r = 1; 526 break; 527 case KVM_CAP_PPC_GUEST_DEBUG_SSTEP: 528 case KVM_CAP_PPC_PAIRED_SINGLES: 529 case KVM_CAP_PPC_OSI: 530 case KVM_CAP_PPC_GET_PVINFO: 531 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) 532 case KVM_CAP_SW_TLB: 533 #endif 534 /* We support this only for PR */ 535 r = !hv_enabled; 536 break; 537 #ifdef CONFIG_KVM_MPIC 538 case KVM_CAP_IRQ_MPIC: 539 r = 1; 540 break; 541 #endif 542 543 #ifdef CONFIG_PPC_BOOK3S_64 544 case KVM_CAP_SPAPR_TCE: 545 case KVM_CAP_SPAPR_TCE_64: 546 r = 1; 547 break; 548 case KVM_CAP_SPAPR_TCE_VFIO: 549 r = !!cpu_has_feature(CPU_FTR_HVMODE); 550 break; 551 case KVM_CAP_PPC_RTAS: 552 case KVM_CAP_PPC_FIXUP_HCALL: 553 case KVM_CAP_PPC_ENABLE_HCALL: 554 #ifdef CONFIG_KVM_XICS 555 case KVM_CAP_IRQ_XICS: 556 #endif 557 case KVM_CAP_PPC_GET_CPU_CHAR: 558 r = 1; 559 break; 560 #ifdef CONFIG_KVM_XIVE 561 case KVM_CAP_PPC_IRQ_XIVE: 562 /* 563 * We need XIVE to be enabled on the platform (implies 564 * a POWER9 processor) and the PowerNV platform, as 565 * nested is not yet supported. 566 */ 567 r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE) && 568 kvmppc_xive_native_supported(); 569 break; 570 #endif 571 572 case KVM_CAP_PPC_ALLOC_HTAB: 573 r = hv_enabled; 574 break; 575 #endif /* CONFIG_PPC_BOOK3S_64 */ 576 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 577 case KVM_CAP_PPC_SMT: 578 r = 0; 579 if (kvm) { 580 if (kvm->arch.emul_smt_mode > 1) 581 r = kvm->arch.emul_smt_mode; 582 else 583 r = kvm->arch.smt_mode; 584 } else if (hv_enabled) { 585 if (cpu_has_feature(CPU_FTR_ARCH_300)) 586 r = 1; 587 else 588 r = threads_per_subcore; 589 } 590 break; 591 case KVM_CAP_PPC_SMT_POSSIBLE: 592 r = 1; 593 if (hv_enabled) { 594 if (!cpu_has_feature(CPU_FTR_ARCH_300)) 595 r = ((threads_per_subcore << 1) - 1); 596 else 597 /* P9 can emulate dbells, so allow any mode */ 598 r = 8 | 4 | 2 | 1; 599 } 600 break; 601 case KVM_CAP_PPC_RMA: 602 r = 0; 603 break; 604 case KVM_CAP_PPC_HWRNG: 605 r = kvmppc_hwrng_present(); 606 break; 607 case KVM_CAP_PPC_MMU_RADIX: 608 r = !!(hv_enabled && radix_enabled()); 609 break; 610 case KVM_CAP_PPC_MMU_HASH_V3: 611 r = !!(hv_enabled && cpu_has_feature(CPU_FTR_ARCH_300) && 612 cpu_has_feature(CPU_FTR_HVMODE)); 613 break; 614 case KVM_CAP_PPC_NESTED_HV: 615 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested && 616 !kvmppc_hv_ops->enable_nested(NULL)); 617 break; 618 #endif 619 case KVM_CAP_SYNC_MMU: 620 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 621 r = hv_enabled; 622 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER) 623 r = 1; 624 #else 625 r = 0; 626 #endif 627 break; 628 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 629 case KVM_CAP_PPC_HTAB_FD: 630 r = hv_enabled; 631 break; 632 #endif 633 case KVM_CAP_NR_VCPUS: 634 /* 635 * Recommending a number of CPUs is somewhat arbitrary; we 636 * return the number of present CPUs for -HV (since a host 637 * will have secondary threads "offline"), and for other KVM 638 * implementations just count online CPUs. 639 */ 640 if (hv_enabled) 641 r = num_present_cpus(); 642 else 643 r = num_online_cpus(); 644 break; 645 case KVM_CAP_MAX_VCPUS: 646 r = KVM_MAX_VCPUS; 647 break; 648 case KVM_CAP_MAX_VCPU_ID: 649 r = KVM_MAX_VCPU_ID; 650 break; 651 #ifdef CONFIG_PPC_BOOK3S_64 652 case KVM_CAP_PPC_GET_SMMU_INFO: 653 r = 1; 654 break; 655 case KVM_CAP_SPAPR_MULTITCE: 656 r = 1; 657 break; 658 case KVM_CAP_SPAPR_RESIZE_HPT: 659 r = !!hv_enabled; 660 break; 661 #endif 662 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 663 case KVM_CAP_PPC_FWNMI: 664 r = hv_enabled; 665 break; 666 #endif 667 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM 668 case KVM_CAP_PPC_HTM: 669 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) || 670 (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST)); 671 break; 672 #endif 673 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE) 674 case KVM_CAP_PPC_SECURE_GUEST: 675 r = hv_enabled && kvmppc_hv_ops->enable_svm && 676 !kvmppc_hv_ops->enable_svm(NULL); 677 break; 678 #endif 679 default: 680 r = 0; 681 break; 682 } 683 return r; 684 685 } 686 687 long kvm_arch_dev_ioctl(struct file *filp, 688 unsigned int ioctl, unsigned long arg) 689 { 690 return -EINVAL; 691 } 692 693 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) 694 { 695 kvmppc_core_free_memslot(kvm, slot); 696 } 697 698 int kvm_arch_prepare_memory_region(struct kvm *kvm, 699 struct kvm_memory_slot *memslot, 700 const struct kvm_userspace_memory_region *mem, 701 enum kvm_mr_change change) 702 { 703 return kvmppc_core_prepare_memory_region(kvm, memslot, mem, change); 704 } 705 706 void kvm_arch_commit_memory_region(struct kvm *kvm, 707 const struct kvm_userspace_memory_region *mem, 708 struct kvm_memory_slot *old, 709 const struct kvm_memory_slot *new, 710 enum kvm_mr_change change) 711 { 712 kvmppc_core_commit_memory_region(kvm, mem, old, new, change); 713 } 714 715 void kvm_arch_flush_shadow_memslot(struct kvm *kvm, 716 struct kvm_memory_slot *slot) 717 { 718 kvmppc_core_flush_memslot(kvm, slot); 719 } 720 721 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) 722 { 723 return 0; 724 } 725 726 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer) 727 { 728 struct kvm_vcpu *vcpu; 729 730 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer); 731 kvmppc_decrementer_func(vcpu); 732 733 return HRTIMER_NORESTART; 734 } 735 736 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) 737 { 738 int err; 739 740 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); 741 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup; 742 vcpu->arch.dec_expires = get_tb(); 743 744 #ifdef CONFIG_KVM_EXIT_TIMING 745 mutex_init(&vcpu->arch.exit_timing_lock); 746 #endif 747 err = kvmppc_subarch_vcpu_init(vcpu); 748 if (err) 749 return err; 750 751 err = kvmppc_core_vcpu_create(vcpu); 752 if (err) 753 goto out_vcpu_uninit; 754 755 vcpu->arch.waitp = &vcpu->wait; 756 kvmppc_create_vcpu_debugfs(vcpu, vcpu->vcpu_id); 757 return 0; 758 759 out_vcpu_uninit: 760 kvmppc_subarch_vcpu_uninit(vcpu); 761 return err; 762 } 763 764 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) 765 { 766 } 767 768 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) 769 { 770 /* Make sure we're not using the vcpu anymore */ 771 hrtimer_cancel(&vcpu->arch.dec_timer); 772 773 kvmppc_remove_vcpu_debugfs(vcpu); 774 775 switch (vcpu->arch.irq_type) { 776 case KVMPPC_IRQ_MPIC: 777 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu); 778 break; 779 case KVMPPC_IRQ_XICS: 780 if (xics_on_xive()) 781 kvmppc_xive_cleanup_vcpu(vcpu); 782 else 783 kvmppc_xics_free_icp(vcpu); 784 break; 785 case KVMPPC_IRQ_XIVE: 786 kvmppc_xive_native_cleanup_vcpu(vcpu); 787 break; 788 } 789 790 kvmppc_core_vcpu_free(vcpu); 791 792 kvmppc_subarch_vcpu_uninit(vcpu); 793 } 794 795 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) 796 { 797 return kvmppc_core_pending_dec(vcpu); 798 } 799 800 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 801 { 802 #ifdef CONFIG_BOOKE 803 /* 804 * vrsave (formerly usprg0) isn't used by Linux, but may 805 * be used by the guest. 806 * 807 * On non-booke this is associated with Altivec and 808 * is handled by code in book3s.c. 809 */ 810 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave); 811 #endif 812 kvmppc_core_vcpu_load(vcpu, cpu); 813 } 814 815 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) 816 { 817 kvmppc_core_vcpu_put(vcpu); 818 #ifdef CONFIG_BOOKE 819 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); 820 #endif 821 } 822 823 /* 824 * irq_bypass_add_producer and irq_bypass_del_producer are only 825 * useful if the architecture supports PCI passthrough. 826 * irq_bypass_stop and irq_bypass_start are not needed and so 827 * kvm_ops are not defined for them. 828 */ 829 bool kvm_arch_has_irq_bypass(void) 830 { 831 return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) || 832 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer)); 833 } 834 835 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, 836 struct irq_bypass_producer *prod) 837 { 838 struct kvm_kernel_irqfd *irqfd = 839 container_of(cons, struct kvm_kernel_irqfd, consumer); 840 struct kvm *kvm = irqfd->kvm; 841 842 if (kvm->arch.kvm_ops->irq_bypass_add_producer) 843 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod); 844 845 return 0; 846 } 847 848 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, 849 struct irq_bypass_producer *prod) 850 { 851 struct kvm_kernel_irqfd *irqfd = 852 container_of(cons, struct kvm_kernel_irqfd, consumer); 853 struct kvm *kvm = irqfd->kvm; 854 855 if (kvm->arch.kvm_ops->irq_bypass_del_producer) 856 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod); 857 } 858 859 #ifdef CONFIG_VSX 860 static inline int kvmppc_get_vsr_dword_offset(int index) 861 { 862 int offset; 863 864 if ((index != 0) && (index != 1)) 865 return -1; 866 867 #ifdef __BIG_ENDIAN 868 offset = index; 869 #else 870 offset = 1 - index; 871 #endif 872 873 return offset; 874 } 875 876 static inline int kvmppc_get_vsr_word_offset(int index) 877 { 878 int offset; 879 880 if ((index > 3) || (index < 0)) 881 return -1; 882 883 #ifdef __BIG_ENDIAN 884 offset = index; 885 #else 886 offset = 3 - index; 887 #endif 888 return offset; 889 } 890 891 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu, 892 u64 gpr) 893 { 894 union kvmppc_one_reg val; 895 int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset); 896 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK; 897 898 if (offset == -1) 899 return; 900 901 if (index >= 32) { 902 val.vval = VCPU_VSX_VR(vcpu, index - 32); 903 val.vsxval[offset] = gpr; 904 VCPU_VSX_VR(vcpu, index - 32) = val.vval; 905 } else { 906 VCPU_VSX_FPR(vcpu, index, offset) = gpr; 907 } 908 } 909 910 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu, 911 u64 gpr) 912 { 913 union kvmppc_one_reg val; 914 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK; 915 916 if (index >= 32) { 917 val.vval = VCPU_VSX_VR(vcpu, index - 32); 918 val.vsxval[0] = gpr; 919 val.vsxval[1] = gpr; 920 VCPU_VSX_VR(vcpu, index - 32) = val.vval; 921 } else { 922 VCPU_VSX_FPR(vcpu, index, 0) = gpr; 923 VCPU_VSX_FPR(vcpu, index, 1) = gpr; 924 } 925 } 926 927 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu, 928 u32 gpr) 929 { 930 union kvmppc_one_reg val; 931 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK; 932 933 if (index >= 32) { 934 val.vsx32val[0] = gpr; 935 val.vsx32val[1] = gpr; 936 val.vsx32val[2] = gpr; 937 val.vsx32val[3] = gpr; 938 VCPU_VSX_VR(vcpu, index - 32) = val.vval; 939 } else { 940 val.vsx32val[0] = gpr; 941 val.vsx32val[1] = gpr; 942 VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0]; 943 VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0]; 944 } 945 } 946 947 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu, 948 u32 gpr32) 949 { 950 union kvmppc_one_reg val; 951 int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset); 952 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK; 953 int dword_offset, word_offset; 954 955 if (offset == -1) 956 return; 957 958 if (index >= 32) { 959 val.vval = VCPU_VSX_VR(vcpu, index - 32); 960 val.vsx32val[offset] = gpr32; 961 VCPU_VSX_VR(vcpu, index - 32) = val.vval; 962 } else { 963 dword_offset = offset / 2; 964 word_offset = offset % 2; 965 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset); 966 val.vsx32val[word_offset] = gpr32; 967 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0]; 968 } 969 } 970 #endif /* CONFIG_VSX */ 971 972 #ifdef CONFIG_ALTIVEC 973 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu, 974 int index, int element_size) 975 { 976 int offset; 977 int elts = sizeof(vector128)/element_size; 978 979 if ((index < 0) || (index >= elts)) 980 return -1; 981 982 if (kvmppc_need_byteswap(vcpu)) 983 offset = elts - index - 1; 984 else 985 offset = index; 986 987 return offset; 988 } 989 990 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu, 991 int index) 992 { 993 return kvmppc_get_vmx_offset_generic(vcpu, index, 8); 994 } 995 996 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu, 997 int index) 998 { 999 return kvmppc_get_vmx_offset_generic(vcpu, index, 4); 1000 } 1001 1002 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu, 1003 int index) 1004 { 1005 return kvmppc_get_vmx_offset_generic(vcpu, index, 2); 1006 } 1007 1008 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu, 1009 int index) 1010 { 1011 return kvmppc_get_vmx_offset_generic(vcpu, index, 1); 1012 } 1013 1014 1015 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu, 1016 u64 gpr) 1017 { 1018 union kvmppc_one_reg val; 1019 int offset = kvmppc_get_vmx_dword_offset(vcpu, 1020 vcpu->arch.mmio_vmx_offset); 1021 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK; 1022 1023 if (offset == -1) 1024 return; 1025 1026 val.vval = VCPU_VSX_VR(vcpu, index); 1027 val.vsxval[offset] = gpr; 1028 VCPU_VSX_VR(vcpu, index) = val.vval; 1029 } 1030 1031 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu, 1032 u32 gpr32) 1033 { 1034 union kvmppc_one_reg val; 1035 int offset = kvmppc_get_vmx_word_offset(vcpu, 1036 vcpu->arch.mmio_vmx_offset); 1037 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK; 1038 1039 if (offset == -1) 1040 return; 1041 1042 val.vval = VCPU_VSX_VR(vcpu, index); 1043 val.vsx32val[offset] = gpr32; 1044 VCPU_VSX_VR(vcpu, index) = val.vval; 1045 } 1046 1047 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu, 1048 u16 gpr16) 1049 { 1050 union kvmppc_one_reg val; 1051 int offset = kvmppc_get_vmx_hword_offset(vcpu, 1052 vcpu->arch.mmio_vmx_offset); 1053 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK; 1054 1055 if (offset == -1) 1056 return; 1057 1058 val.vval = VCPU_VSX_VR(vcpu, index); 1059 val.vsx16val[offset] = gpr16; 1060 VCPU_VSX_VR(vcpu, index) = val.vval; 1061 } 1062 1063 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu, 1064 u8 gpr8) 1065 { 1066 union kvmppc_one_reg val; 1067 int offset = kvmppc_get_vmx_byte_offset(vcpu, 1068 vcpu->arch.mmio_vmx_offset); 1069 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK; 1070 1071 if (offset == -1) 1072 return; 1073 1074 val.vval = VCPU_VSX_VR(vcpu, index); 1075 val.vsx8val[offset] = gpr8; 1076 VCPU_VSX_VR(vcpu, index) = val.vval; 1077 } 1078 #endif /* CONFIG_ALTIVEC */ 1079 1080 #ifdef CONFIG_PPC_FPU 1081 static inline u64 sp_to_dp(u32 fprs) 1082 { 1083 u64 fprd; 1084 1085 preempt_disable(); 1086 enable_kernel_fp(); 1087 asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs) 1088 : "fr0"); 1089 preempt_enable(); 1090 return fprd; 1091 } 1092 1093 static inline u32 dp_to_sp(u64 fprd) 1094 { 1095 u32 fprs; 1096 1097 preempt_disable(); 1098 enable_kernel_fp(); 1099 asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd) 1100 : "fr0"); 1101 preempt_enable(); 1102 return fprs; 1103 } 1104 1105 #else 1106 #define sp_to_dp(x) (x) 1107 #define dp_to_sp(x) (x) 1108 #endif /* CONFIG_PPC_FPU */ 1109 1110 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, 1111 struct kvm_run *run) 1112 { 1113 u64 uninitialized_var(gpr); 1114 1115 if (run->mmio.len > sizeof(gpr)) { 1116 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len); 1117 return; 1118 } 1119 1120 if (!vcpu->arch.mmio_host_swabbed) { 1121 switch (run->mmio.len) { 1122 case 8: gpr = *(u64 *)run->mmio.data; break; 1123 case 4: gpr = *(u32 *)run->mmio.data; break; 1124 case 2: gpr = *(u16 *)run->mmio.data; break; 1125 case 1: gpr = *(u8 *)run->mmio.data; break; 1126 } 1127 } else { 1128 switch (run->mmio.len) { 1129 case 8: gpr = swab64(*(u64 *)run->mmio.data); break; 1130 case 4: gpr = swab32(*(u32 *)run->mmio.data); break; 1131 case 2: gpr = swab16(*(u16 *)run->mmio.data); break; 1132 case 1: gpr = *(u8 *)run->mmio.data; break; 1133 } 1134 } 1135 1136 /* conversion between single and double precision */ 1137 if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4)) 1138 gpr = sp_to_dp(gpr); 1139 1140 if (vcpu->arch.mmio_sign_extend) { 1141 switch (run->mmio.len) { 1142 #ifdef CONFIG_PPC64 1143 case 4: 1144 gpr = (s64)(s32)gpr; 1145 break; 1146 #endif 1147 case 2: 1148 gpr = (s64)(s16)gpr; 1149 break; 1150 case 1: 1151 gpr = (s64)(s8)gpr; 1152 break; 1153 } 1154 } 1155 1156 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) { 1157 case KVM_MMIO_REG_GPR: 1158 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); 1159 break; 1160 case KVM_MMIO_REG_FPR: 1161 if (vcpu->kvm->arch.kvm_ops->giveup_ext) 1162 vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP); 1163 1164 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr; 1165 break; 1166 #ifdef CONFIG_PPC_BOOK3S 1167 case KVM_MMIO_REG_QPR: 1168 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; 1169 break; 1170 case KVM_MMIO_REG_FQPR: 1171 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr; 1172 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; 1173 break; 1174 #endif 1175 #ifdef CONFIG_VSX 1176 case KVM_MMIO_REG_VSX: 1177 if (vcpu->kvm->arch.kvm_ops->giveup_ext) 1178 vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX); 1179 1180 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD) 1181 kvmppc_set_vsr_dword(vcpu, gpr); 1182 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD) 1183 kvmppc_set_vsr_word(vcpu, gpr); 1184 else if (vcpu->arch.mmio_copy_type == 1185 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP) 1186 kvmppc_set_vsr_dword_dump(vcpu, gpr); 1187 else if (vcpu->arch.mmio_copy_type == 1188 KVMPPC_VSX_COPY_WORD_LOAD_DUMP) 1189 kvmppc_set_vsr_word_dump(vcpu, gpr); 1190 break; 1191 #endif 1192 #ifdef CONFIG_ALTIVEC 1193 case KVM_MMIO_REG_VMX: 1194 if (vcpu->kvm->arch.kvm_ops->giveup_ext) 1195 vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC); 1196 1197 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD) 1198 kvmppc_set_vmx_dword(vcpu, gpr); 1199 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD) 1200 kvmppc_set_vmx_word(vcpu, gpr); 1201 else if (vcpu->arch.mmio_copy_type == 1202 KVMPPC_VMX_COPY_HWORD) 1203 kvmppc_set_vmx_hword(vcpu, gpr); 1204 else if (vcpu->arch.mmio_copy_type == 1205 KVMPPC_VMX_COPY_BYTE) 1206 kvmppc_set_vmx_byte(vcpu, gpr); 1207 break; 1208 #endif 1209 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 1210 case KVM_MMIO_REG_NESTED_GPR: 1211 if (kvmppc_need_byteswap(vcpu)) 1212 gpr = swab64(gpr); 1213 kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr, 1214 sizeof(gpr)); 1215 break; 1216 #endif 1217 default: 1218 BUG(); 1219 } 1220 } 1221 1222 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, 1223 unsigned int rt, unsigned int bytes, 1224 int is_default_endian, int sign_extend) 1225 { 1226 int idx, ret; 1227 bool host_swabbed; 1228 1229 /* Pity C doesn't have a logical XOR operator */ 1230 if (kvmppc_need_byteswap(vcpu)) { 1231 host_swabbed = is_default_endian; 1232 } else { 1233 host_swabbed = !is_default_endian; 1234 } 1235 1236 if (bytes > sizeof(run->mmio.data)) { 1237 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, 1238 run->mmio.len); 1239 } 1240 1241 run->mmio.phys_addr = vcpu->arch.paddr_accessed; 1242 run->mmio.len = bytes; 1243 run->mmio.is_write = 0; 1244 1245 vcpu->arch.io_gpr = rt; 1246 vcpu->arch.mmio_host_swabbed = host_swabbed; 1247 vcpu->mmio_needed = 1; 1248 vcpu->mmio_is_write = 0; 1249 vcpu->arch.mmio_sign_extend = sign_extend; 1250 1251 idx = srcu_read_lock(&vcpu->kvm->srcu); 1252 1253 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr, 1254 bytes, &run->mmio.data); 1255 1256 srcu_read_unlock(&vcpu->kvm->srcu, idx); 1257 1258 if (!ret) { 1259 kvmppc_complete_mmio_load(vcpu, run); 1260 vcpu->mmio_needed = 0; 1261 return EMULATE_DONE; 1262 } 1263 1264 return EMULATE_DO_MMIO; 1265 } 1266 1267 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, 1268 unsigned int rt, unsigned int bytes, 1269 int is_default_endian) 1270 { 1271 return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0); 1272 } 1273 EXPORT_SYMBOL_GPL(kvmppc_handle_load); 1274 1275 /* Same as above, but sign extends */ 1276 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu, 1277 unsigned int rt, unsigned int bytes, 1278 int is_default_endian) 1279 { 1280 return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1); 1281 } 1282 1283 #ifdef CONFIG_VSX 1284 int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu, 1285 unsigned int rt, unsigned int bytes, 1286 int is_default_endian, int mmio_sign_extend) 1287 { 1288 enum emulation_result emulated = EMULATE_DONE; 1289 1290 /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */ 1291 if (vcpu->arch.mmio_vsx_copy_nums > 4) 1292 return EMULATE_FAIL; 1293 1294 while (vcpu->arch.mmio_vsx_copy_nums) { 1295 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes, 1296 is_default_endian, mmio_sign_extend); 1297 1298 if (emulated != EMULATE_DONE) 1299 break; 1300 1301 vcpu->arch.paddr_accessed += run->mmio.len; 1302 1303 vcpu->arch.mmio_vsx_copy_nums--; 1304 vcpu->arch.mmio_vsx_offset++; 1305 } 1306 return emulated; 1307 } 1308 #endif /* CONFIG_VSX */ 1309 1310 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, 1311 u64 val, unsigned int bytes, int is_default_endian) 1312 { 1313 void *data = run->mmio.data; 1314 int idx, ret; 1315 bool host_swabbed; 1316 1317 /* Pity C doesn't have a logical XOR operator */ 1318 if (kvmppc_need_byteswap(vcpu)) { 1319 host_swabbed = is_default_endian; 1320 } else { 1321 host_swabbed = !is_default_endian; 1322 } 1323 1324 if (bytes > sizeof(run->mmio.data)) { 1325 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, 1326 run->mmio.len); 1327 } 1328 1329 run->mmio.phys_addr = vcpu->arch.paddr_accessed; 1330 run->mmio.len = bytes; 1331 run->mmio.is_write = 1; 1332 vcpu->mmio_needed = 1; 1333 vcpu->mmio_is_write = 1; 1334 1335 if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4)) 1336 val = dp_to_sp(val); 1337 1338 /* Store the value at the lowest bytes in 'data'. */ 1339 if (!host_swabbed) { 1340 switch (bytes) { 1341 case 8: *(u64 *)data = val; break; 1342 case 4: *(u32 *)data = val; break; 1343 case 2: *(u16 *)data = val; break; 1344 case 1: *(u8 *)data = val; break; 1345 } 1346 } else { 1347 switch (bytes) { 1348 case 8: *(u64 *)data = swab64(val); break; 1349 case 4: *(u32 *)data = swab32(val); break; 1350 case 2: *(u16 *)data = swab16(val); break; 1351 case 1: *(u8 *)data = val; break; 1352 } 1353 } 1354 1355 idx = srcu_read_lock(&vcpu->kvm->srcu); 1356 1357 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr, 1358 bytes, &run->mmio.data); 1359 1360 srcu_read_unlock(&vcpu->kvm->srcu, idx); 1361 1362 if (!ret) { 1363 vcpu->mmio_needed = 0; 1364 return EMULATE_DONE; 1365 } 1366 1367 return EMULATE_DO_MMIO; 1368 } 1369 EXPORT_SYMBOL_GPL(kvmppc_handle_store); 1370 1371 #ifdef CONFIG_VSX 1372 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val) 1373 { 1374 u32 dword_offset, word_offset; 1375 union kvmppc_one_reg reg; 1376 int vsx_offset = 0; 1377 int copy_type = vcpu->arch.mmio_copy_type; 1378 int result = 0; 1379 1380 switch (copy_type) { 1381 case KVMPPC_VSX_COPY_DWORD: 1382 vsx_offset = 1383 kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset); 1384 1385 if (vsx_offset == -1) { 1386 result = -1; 1387 break; 1388 } 1389 1390 if (rs < 32) { 1391 *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset); 1392 } else { 1393 reg.vval = VCPU_VSX_VR(vcpu, rs - 32); 1394 *val = reg.vsxval[vsx_offset]; 1395 } 1396 break; 1397 1398 case KVMPPC_VSX_COPY_WORD: 1399 vsx_offset = 1400 kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset); 1401 1402 if (vsx_offset == -1) { 1403 result = -1; 1404 break; 1405 } 1406 1407 if (rs < 32) { 1408 dword_offset = vsx_offset / 2; 1409 word_offset = vsx_offset % 2; 1410 reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset); 1411 *val = reg.vsx32val[word_offset]; 1412 } else { 1413 reg.vval = VCPU_VSX_VR(vcpu, rs - 32); 1414 *val = reg.vsx32val[vsx_offset]; 1415 } 1416 break; 1417 1418 default: 1419 result = -1; 1420 break; 1421 } 1422 1423 return result; 1424 } 1425 1426 int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu, 1427 int rs, unsigned int bytes, int is_default_endian) 1428 { 1429 u64 val; 1430 enum emulation_result emulated = EMULATE_DONE; 1431 1432 vcpu->arch.io_gpr = rs; 1433 1434 /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */ 1435 if (vcpu->arch.mmio_vsx_copy_nums > 4) 1436 return EMULATE_FAIL; 1437 1438 while (vcpu->arch.mmio_vsx_copy_nums) { 1439 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1) 1440 return EMULATE_FAIL; 1441 1442 emulated = kvmppc_handle_store(run, vcpu, 1443 val, bytes, is_default_endian); 1444 1445 if (emulated != EMULATE_DONE) 1446 break; 1447 1448 vcpu->arch.paddr_accessed += run->mmio.len; 1449 1450 vcpu->arch.mmio_vsx_copy_nums--; 1451 vcpu->arch.mmio_vsx_offset++; 1452 } 1453 1454 return emulated; 1455 } 1456 1457 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu, 1458 struct kvm_run *run) 1459 { 1460 enum emulation_result emulated = EMULATE_FAIL; 1461 int r; 1462 1463 vcpu->arch.paddr_accessed += run->mmio.len; 1464 1465 if (!vcpu->mmio_is_write) { 1466 emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr, 1467 run->mmio.len, 1, vcpu->arch.mmio_sign_extend); 1468 } else { 1469 emulated = kvmppc_handle_vsx_store(run, vcpu, 1470 vcpu->arch.io_gpr, run->mmio.len, 1); 1471 } 1472 1473 switch (emulated) { 1474 case EMULATE_DO_MMIO: 1475 run->exit_reason = KVM_EXIT_MMIO; 1476 r = RESUME_HOST; 1477 break; 1478 case EMULATE_FAIL: 1479 pr_info("KVM: MMIO emulation failed (VSX repeat)\n"); 1480 run->exit_reason = KVM_EXIT_INTERNAL_ERROR; 1481 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; 1482 r = RESUME_HOST; 1483 break; 1484 default: 1485 r = RESUME_GUEST; 1486 break; 1487 } 1488 return r; 1489 } 1490 #endif /* CONFIG_VSX */ 1491 1492 #ifdef CONFIG_ALTIVEC 1493 int kvmppc_handle_vmx_load(struct kvm_run *run, struct kvm_vcpu *vcpu, 1494 unsigned int rt, unsigned int bytes, int is_default_endian) 1495 { 1496 enum emulation_result emulated = EMULATE_DONE; 1497 1498 if (vcpu->arch.mmio_vsx_copy_nums > 2) 1499 return EMULATE_FAIL; 1500 1501 while (vcpu->arch.mmio_vmx_copy_nums) { 1502 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes, 1503 is_default_endian, 0); 1504 1505 if (emulated != EMULATE_DONE) 1506 break; 1507 1508 vcpu->arch.paddr_accessed += run->mmio.len; 1509 vcpu->arch.mmio_vmx_copy_nums--; 1510 vcpu->arch.mmio_vmx_offset++; 1511 } 1512 1513 return emulated; 1514 } 1515 1516 int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val) 1517 { 1518 union kvmppc_one_reg reg; 1519 int vmx_offset = 0; 1520 int result = 0; 1521 1522 vmx_offset = 1523 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset); 1524 1525 if (vmx_offset == -1) 1526 return -1; 1527 1528 reg.vval = VCPU_VSX_VR(vcpu, index); 1529 *val = reg.vsxval[vmx_offset]; 1530 1531 return result; 1532 } 1533 1534 int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val) 1535 { 1536 union kvmppc_one_reg reg; 1537 int vmx_offset = 0; 1538 int result = 0; 1539 1540 vmx_offset = 1541 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset); 1542 1543 if (vmx_offset == -1) 1544 return -1; 1545 1546 reg.vval = VCPU_VSX_VR(vcpu, index); 1547 *val = reg.vsx32val[vmx_offset]; 1548 1549 return result; 1550 } 1551 1552 int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val) 1553 { 1554 union kvmppc_one_reg reg; 1555 int vmx_offset = 0; 1556 int result = 0; 1557 1558 vmx_offset = 1559 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset); 1560 1561 if (vmx_offset == -1) 1562 return -1; 1563 1564 reg.vval = VCPU_VSX_VR(vcpu, index); 1565 *val = reg.vsx16val[vmx_offset]; 1566 1567 return result; 1568 } 1569 1570 int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val) 1571 { 1572 union kvmppc_one_reg reg; 1573 int vmx_offset = 0; 1574 int result = 0; 1575 1576 vmx_offset = 1577 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset); 1578 1579 if (vmx_offset == -1) 1580 return -1; 1581 1582 reg.vval = VCPU_VSX_VR(vcpu, index); 1583 *val = reg.vsx8val[vmx_offset]; 1584 1585 return result; 1586 } 1587 1588 int kvmppc_handle_vmx_store(struct kvm_run *run, struct kvm_vcpu *vcpu, 1589 unsigned int rs, unsigned int bytes, int is_default_endian) 1590 { 1591 u64 val = 0; 1592 unsigned int index = rs & KVM_MMIO_REG_MASK; 1593 enum emulation_result emulated = EMULATE_DONE; 1594 1595 if (vcpu->arch.mmio_vsx_copy_nums > 2) 1596 return EMULATE_FAIL; 1597 1598 vcpu->arch.io_gpr = rs; 1599 1600 while (vcpu->arch.mmio_vmx_copy_nums) { 1601 switch (vcpu->arch.mmio_copy_type) { 1602 case KVMPPC_VMX_COPY_DWORD: 1603 if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1) 1604 return EMULATE_FAIL; 1605 1606 break; 1607 case KVMPPC_VMX_COPY_WORD: 1608 if (kvmppc_get_vmx_word(vcpu, index, &val) == -1) 1609 return EMULATE_FAIL; 1610 break; 1611 case KVMPPC_VMX_COPY_HWORD: 1612 if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1) 1613 return EMULATE_FAIL; 1614 break; 1615 case KVMPPC_VMX_COPY_BYTE: 1616 if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1) 1617 return EMULATE_FAIL; 1618 break; 1619 default: 1620 return EMULATE_FAIL; 1621 } 1622 1623 emulated = kvmppc_handle_store(run, vcpu, val, bytes, 1624 is_default_endian); 1625 if (emulated != EMULATE_DONE) 1626 break; 1627 1628 vcpu->arch.paddr_accessed += run->mmio.len; 1629 vcpu->arch.mmio_vmx_copy_nums--; 1630 vcpu->arch.mmio_vmx_offset++; 1631 } 1632 1633 return emulated; 1634 } 1635 1636 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu, 1637 struct kvm_run *run) 1638 { 1639 enum emulation_result emulated = EMULATE_FAIL; 1640 int r; 1641 1642 vcpu->arch.paddr_accessed += run->mmio.len; 1643 1644 if (!vcpu->mmio_is_write) { 1645 emulated = kvmppc_handle_vmx_load(run, vcpu, 1646 vcpu->arch.io_gpr, run->mmio.len, 1); 1647 } else { 1648 emulated = kvmppc_handle_vmx_store(run, vcpu, 1649 vcpu->arch.io_gpr, run->mmio.len, 1); 1650 } 1651 1652 switch (emulated) { 1653 case EMULATE_DO_MMIO: 1654 run->exit_reason = KVM_EXIT_MMIO; 1655 r = RESUME_HOST; 1656 break; 1657 case EMULATE_FAIL: 1658 pr_info("KVM: MMIO emulation failed (VMX repeat)\n"); 1659 run->exit_reason = KVM_EXIT_INTERNAL_ERROR; 1660 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; 1661 r = RESUME_HOST; 1662 break; 1663 default: 1664 r = RESUME_GUEST; 1665 break; 1666 } 1667 return r; 1668 } 1669 #endif /* CONFIG_ALTIVEC */ 1670 1671 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 1672 { 1673 int r = 0; 1674 union kvmppc_one_reg val; 1675 int size; 1676 1677 size = one_reg_size(reg->id); 1678 if (size > sizeof(val)) 1679 return -EINVAL; 1680 1681 r = kvmppc_get_one_reg(vcpu, reg->id, &val); 1682 if (r == -EINVAL) { 1683 r = 0; 1684 switch (reg->id) { 1685 #ifdef CONFIG_ALTIVEC 1686 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31: 1687 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 1688 r = -ENXIO; 1689 break; 1690 } 1691 val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0]; 1692 break; 1693 case KVM_REG_PPC_VSCR: 1694 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 1695 r = -ENXIO; 1696 break; 1697 } 1698 val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]); 1699 break; 1700 case KVM_REG_PPC_VRSAVE: 1701 val = get_reg_val(reg->id, vcpu->arch.vrsave); 1702 break; 1703 #endif /* CONFIG_ALTIVEC */ 1704 default: 1705 r = -EINVAL; 1706 break; 1707 } 1708 } 1709 1710 if (r) 1711 return r; 1712 1713 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size)) 1714 r = -EFAULT; 1715 1716 return r; 1717 } 1718 1719 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 1720 { 1721 int r; 1722 union kvmppc_one_reg val; 1723 int size; 1724 1725 size = one_reg_size(reg->id); 1726 if (size > sizeof(val)) 1727 return -EINVAL; 1728 1729 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size)) 1730 return -EFAULT; 1731 1732 r = kvmppc_set_one_reg(vcpu, reg->id, &val); 1733 if (r == -EINVAL) { 1734 r = 0; 1735 switch (reg->id) { 1736 #ifdef CONFIG_ALTIVEC 1737 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31: 1738 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 1739 r = -ENXIO; 1740 break; 1741 } 1742 vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval; 1743 break; 1744 case KVM_REG_PPC_VSCR: 1745 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 1746 r = -ENXIO; 1747 break; 1748 } 1749 vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val); 1750 break; 1751 case KVM_REG_PPC_VRSAVE: 1752 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 1753 r = -ENXIO; 1754 break; 1755 } 1756 vcpu->arch.vrsave = set_reg_val(reg->id, val); 1757 break; 1758 #endif /* CONFIG_ALTIVEC */ 1759 default: 1760 r = -EINVAL; 1761 break; 1762 } 1763 } 1764 1765 return r; 1766 } 1767 1768 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) 1769 { 1770 struct kvm_run *run = vcpu->run; 1771 int r; 1772 1773 vcpu_load(vcpu); 1774 1775 if (vcpu->mmio_needed) { 1776 vcpu->mmio_needed = 0; 1777 if (!vcpu->mmio_is_write) 1778 kvmppc_complete_mmio_load(vcpu, run); 1779 #ifdef CONFIG_VSX 1780 if (vcpu->arch.mmio_vsx_copy_nums > 0) { 1781 vcpu->arch.mmio_vsx_copy_nums--; 1782 vcpu->arch.mmio_vsx_offset++; 1783 } 1784 1785 if (vcpu->arch.mmio_vsx_copy_nums > 0) { 1786 r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run); 1787 if (r == RESUME_HOST) { 1788 vcpu->mmio_needed = 1; 1789 goto out; 1790 } 1791 } 1792 #endif 1793 #ifdef CONFIG_ALTIVEC 1794 if (vcpu->arch.mmio_vmx_copy_nums > 0) { 1795 vcpu->arch.mmio_vmx_copy_nums--; 1796 vcpu->arch.mmio_vmx_offset++; 1797 } 1798 1799 if (vcpu->arch.mmio_vmx_copy_nums > 0) { 1800 r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run); 1801 if (r == RESUME_HOST) { 1802 vcpu->mmio_needed = 1; 1803 goto out; 1804 } 1805 } 1806 #endif 1807 } else if (vcpu->arch.osi_needed) { 1808 u64 *gprs = run->osi.gprs; 1809 int i; 1810 1811 for (i = 0; i < 32; i++) 1812 kvmppc_set_gpr(vcpu, i, gprs[i]); 1813 vcpu->arch.osi_needed = 0; 1814 } else if (vcpu->arch.hcall_needed) { 1815 int i; 1816 1817 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret); 1818 for (i = 0; i < 9; ++i) 1819 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]); 1820 vcpu->arch.hcall_needed = 0; 1821 #ifdef CONFIG_BOOKE 1822 } else if (vcpu->arch.epr_needed) { 1823 kvmppc_set_epr(vcpu, run->epr.epr); 1824 vcpu->arch.epr_needed = 0; 1825 #endif 1826 } 1827 1828 kvm_sigset_activate(vcpu); 1829 1830 if (run->immediate_exit) 1831 r = -EINTR; 1832 else 1833 r = kvmppc_vcpu_run(run, vcpu); 1834 1835 kvm_sigset_deactivate(vcpu); 1836 1837 #ifdef CONFIG_ALTIVEC 1838 out: 1839 #endif 1840 vcpu_put(vcpu); 1841 return r; 1842 } 1843 1844 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) 1845 { 1846 if (irq->irq == KVM_INTERRUPT_UNSET) { 1847 kvmppc_core_dequeue_external(vcpu); 1848 return 0; 1849 } 1850 1851 kvmppc_core_queue_external(vcpu, irq); 1852 1853 kvm_vcpu_kick(vcpu); 1854 1855 return 0; 1856 } 1857 1858 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, 1859 struct kvm_enable_cap *cap) 1860 { 1861 int r; 1862 1863 if (cap->flags) 1864 return -EINVAL; 1865 1866 switch (cap->cap) { 1867 case KVM_CAP_PPC_OSI: 1868 r = 0; 1869 vcpu->arch.osi_enabled = true; 1870 break; 1871 case KVM_CAP_PPC_PAPR: 1872 r = 0; 1873 vcpu->arch.papr_enabled = true; 1874 break; 1875 case KVM_CAP_PPC_EPR: 1876 r = 0; 1877 if (cap->args[0]) 1878 vcpu->arch.epr_flags |= KVMPPC_EPR_USER; 1879 else 1880 vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER; 1881 break; 1882 #ifdef CONFIG_BOOKE 1883 case KVM_CAP_PPC_BOOKE_WATCHDOG: 1884 r = 0; 1885 vcpu->arch.watchdog_enabled = true; 1886 break; 1887 #endif 1888 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) 1889 case KVM_CAP_SW_TLB: { 1890 struct kvm_config_tlb cfg; 1891 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0]; 1892 1893 r = -EFAULT; 1894 if (copy_from_user(&cfg, user_ptr, sizeof(cfg))) 1895 break; 1896 1897 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg); 1898 break; 1899 } 1900 #endif 1901 #ifdef CONFIG_KVM_MPIC 1902 case KVM_CAP_IRQ_MPIC: { 1903 struct fd f; 1904 struct kvm_device *dev; 1905 1906 r = -EBADF; 1907 f = fdget(cap->args[0]); 1908 if (!f.file) 1909 break; 1910 1911 r = -EPERM; 1912 dev = kvm_device_from_filp(f.file); 1913 if (dev) 1914 r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]); 1915 1916 fdput(f); 1917 break; 1918 } 1919 #endif 1920 #ifdef CONFIG_KVM_XICS 1921 case KVM_CAP_IRQ_XICS: { 1922 struct fd f; 1923 struct kvm_device *dev; 1924 1925 r = -EBADF; 1926 f = fdget(cap->args[0]); 1927 if (!f.file) 1928 break; 1929 1930 r = -EPERM; 1931 dev = kvm_device_from_filp(f.file); 1932 if (dev) { 1933 if (xics_on_xive()) 1934 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]); 1935 else 1936 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]); 1937 } 1938 1939 fdput(f); 1940 break; 1941 } 1942 #endif /* CONFIG_KVM_XICS */ 1943 #ifdef CONFIG_KVM_XIVE 1944 case KVM_CAP_PPC_IRQ_XIVE: { 1945 struct fd f; 1946 struct kvm_device *dev; 1947 1948 r = -EBADF; 1949 f = fdget(cap->args[0]); 1950 if (!f.file) 1951 break; 1952 1953 r = -ENXIO; 1954 if (!xive_enabled()) 1955 break; 1956 1957 r = -EPERM; 1958 dev = kvm_device_from_filp(f.file); 1959 if (dev) 1960 r = kvmppc_xive_native_connect_vcpu(dev, vcpu, 1961 cap->args[1]); 1962 1963 fdput(f); 1964 break; 1965 } 1966 #endif /* CONFIG_KVM_XIVE */ 1967 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 1968 case KVM_CAP_PPC_FWNMI: 1969 r = -EINVAL; 1970 if (!is_kvmppc_hv_enabled(vcpu->kvm)) 1971 break; 1972 r = 0; 1973 vcpu->kvm->arch.fwnmi_enabled = true; 1974 break; 1975 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ 1976 default: 1977 r = -EINVAL; 1978 break; 1979 } 1980 1981 if (!r) 1982 r = kvmppc_sanity_check(vcpu); 1983 1984 return r; 1985 } 1986 1987 bool kvm_arch_intc_initialized(struct kvm *kvm) 1988 { 1989 #ifdef CONFIG_KVM_MPIC 1990 if (kvm->arch.mpic) 1991 return true; 1992 #endif 1993 #ifdef CONFIG_KVM_XICS 1994 if (kvm->arch.xics || kvm->arch.xive) 1995 return true; 1996 #endif 1997 return false; 1998 } 1999 2000 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 2001 struct kvm_mp_state *mp_state) 2002 { 2003 return -EINVAL; 2004 } 2005 2006 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 2007 struct kvm_mp_state *mp_state) 2008 { 2009 return -EINVAL; 2010 } 2011 2012 long kvm_arch_vcpu_async_ioctl(struct file *filp, 2013 unsigned int ioctl, unsigned long arg) 2014 { 2015 struct kvm_vcpu *vcpu = filp->private_data; 2016 void __user *argp = (void __user *)arg; 2017 2018 if (ioctl == KVM_INTERRUPT) { 2019 struct kvm_interrupt irq; 2020 if (copy_from_user(&irq, argp, sizeof(irq))) 2021 return -EFAULT; 2022 return kvm_vcpu_ioctl_interrupt(vcpu, &irq); 2023 } 2024 return -ENOIOCTLCMD; 2025 } 2026 2027 long kvm_arch_vcpu_ioctl(struct file *filp, 2028 unsigned int ioctl, unsigned long arg) 2029 { 2030 struct kvm_vcpu *vcpu = filp->private_data; 2031 void __user *argp = (void __user *)arg; 2032 long r; 2033 2034 switch (ioctl) { 2035 case KVM_ENABLE_CAP: 2036 { 2037 struct kvm_enable_cap cap; 2038 r = -EFAULT; 2039 vcpu_load(vcpu); 2040 if (copy_from_user(&cap, argp, sizeof(cap))) 2041 goto out; 2042 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); 2043 vcpu_put(vcpu); 2044 break; 2045 } 2046 2047 case KVM_SET_ONE_REG: 2048 case KVM_GET_ONE_REG: 2049 { 2050 struct kvm_one_reg reg; 2051 r = -EFAULT; 2052 if (copy_from_user(®, argp, sizeof(reg))) 2053 goto out; 2054 if (ioctl == KVM_SET_ONE_REG) 2055 r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®); 2056 else 2057 r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®); 2058 break; 2059 } 2060 2061 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) 2062 case KVM_DIRTY_TLB: { 2063 struct kvm_dirty_tlb dirty; 2064 r = -EFAULT; 2065 vcpu_load(vcpu); 2066 if (copy_from_user(&dirty, argp, sizeof(dirty))) 2067 goto out; 2068 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty); 2069 vcpu_put(vcpu); 2070 break; 2071 } 2072 #endif 2073 default: 2074 r = -EINVAL; 2075 } 2076 2077 out: 2078 return r; 2079 } 2080 2081 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) 2082 { 2083 return VM_FAULT_SIGBUS; 2084 } 2085 2086 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) 2087 { 2088 u32 inst_nop = 0x60000000; 2089 #ifdef CONFIG_KVM_BOOKE_HV 2090 u32 inst_sc1 = 0x44000022; 2091 pvinfo->hcall[0] = cpu_to_be32(inst_sc1); 2092 pvinfo->hcall[1] = cpu_to_be32(inst_nop); 2093 pvinfo->hcall[2] = cpu_to_be32(inst_nop); 2094 pvinfo->hcall[3] = cpu_to_be32(inst_nop); 2095 #else 2096 u32 inst_lis = 0x3c000000; 2097 u32 inst_ori = 0x60000000; 2098 u32 inst_sc = 0x44000002; 2099 u32 inst_imm_mask = 0xffff; 2100 2101 /* 2102 * The hypercall to get into KVM from within guest context is as 2103 * follows: 2104 * 2105 * lis r0, r0, KVM_SC_MAGIC_R0@h 2106 * ori r0, KVM_SC_MAGIC_R0@l 2107 * sc 2108 * nop 2109 */ 2110 pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask)); 2111 pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask)); 2112 pvinfo->hcall[2] = cpu_to_be32(inst_sc); 2113 pvinfo->hcall[3] = cpu_to_be32(inst_nop); 2114 #endif 2115 2116 pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE; 2117 2118 return 0; 2119 } 2120 2121 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, 2122 bool line_status) 2123 { 2124 if (!irqchip_in_kernel(kvm)) 2125 return -ENXIO; 2126 2127 irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 2128 irq_event->irq, irq_event->level, 2129 line_status); 2130 return 0; 2131 } 2132 2133 2134 int kvm_vm_ioctl_enable_cap(struct kvm *kvm, 2135 struct kvm_enable_cap *cap) 2136 { 2137 int r; 2138 2139 if (cap->flags) 2140 return -EINVAL; 2141 2142 switch (cap->cap) { 2143 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 2144 case KVM_CAP_PPC_ENABLE_HCALL: { 2145 unsigned long hcall = cap->args[0]; 2146 2147 r = -EINVAL; 2148 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) || 2149 cap->args[1] > 1) 2150 break; 2151 if (!kvmppc_book3s_hcall_implemented(kvm, hcall)) 2152 break; 2153 if (cap->args[1]) 2154 set_bit(hcall / 4, kvm->arch.enabled_hcalls); 2155 else 2156 clear_bit(hcall / 4, kvm->arch.enabled_hcalls); 2157 r = 0; 2158 break; 2159 } 2160 case KVM_CAP_PPC_SMT: { 2161 unsigned long mode = cap->args[0]; 2162 unsigned long flags = cap->args[1]; 2163 2164 r = -EINVAL; 2165 if (kvm->arch.kvm_ops->set_smt_mode) 2166 r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags); 2167 break; 2168 } 2169 2170 case KVM_CAP_PPC_NESTED_HV: 2171 r = -EINVAL; 2172 if (!is_kvmppc_hv_enabled(kvm) || 2173 !kvm->arch.kvm_ops->enable_nested) 2174 break; 2175 r = kvm->arch.kvm_ops->enable_nested(kvm); 2176 break; 2177 #endif 2178 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE) 2179 case KVM_CAP_PPC_SECURE_GUEST: 2180 r = -EINVAL; 2181 if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_svm) 2182 break; 2183 r = kvm->arch.kvm_ops->enable_svm(kvm); 2184 break; 2185 #endif 2186 default: 2187 r = -EINVAL; 2188 break; 2189 } 2190 2191 return r; 2192 } 2193 2194 #ifdef CONFIG_PPC_BOOK3S_64 2195 /* 2196 * These functions check whether the underlying hardware is safe 2197 * against attacks based on observing the effects of speculatively 2198 * executed instructions, and whether it supplies instructions for 2199 * use in workarounds. The information comes from firmware, either 2200 * via the device tree on powernv platforms or from an hcall on 2201 * pseries platforms. 2202 */ 2203 #ifdef CONFIG_PPC_PSERIES 2204 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp) 2205 { 2206 struct h_cpu_char_result c; 2207 unsigned long rc; 2208 2209 if (!machine_is(pseries)) 2210 return -ENOTTY; 2211 2212 rc = plpar_get_cpu_characteristics(&c); 2213 if (rc == H_SUCCESS) { 2214 cp->character = c.character; 2215 cp->behaviour = c.behaviour; 2216 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 | 2217 KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED | 2218 KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 | 2219 KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 | 2220 KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV | 2221 KVM_PPC_CPU_CHAR_BR_HINT_HONOURED | 2222 KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF | 2223 KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS | 2224 KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST; 2225 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY | 2226 KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR | 2227 KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR | 2228 KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE; 2229 } 2230 return 0; 2231 } 2232 #else 2233 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp) 2234 { 2235 return -ENOTTY; 2236 } 2237 #endif 2238 2239 static inline bool have_fw_feat(struct device_node *fw_features, 2240 const char *state, const char *name) 2241 { 2242 struct device_node *np; 2243 bool r = false; 2244 2245 np = of_get_child_by_name(fw_features, name); 2246 if (np) { 2247 r = of_property_read_bool(np, state); 2248 of_node_put(np); 2249 } 2250 return r; 2251 } 2252 2253 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp) 2254 { 2255 struct device_node *np, *fw_features; 2256 int r; 2257 2258 memset(cp, 0, sizeof(*cp)); 2259 r = pseries_get_cpu_char(cp); 2260 if (r != -ENOTTY) 2261 return r; 2262 2263 np = of_find_node_by_name(NULL, "ibm,opal"); 2264 if (np) { 2265 fw_features = of_get_child_by_name(np, "fw-features"); 2266 of_node_put(np); 2267 if (!fw_features) 2268 return 0; 2269 if (have_fw_feat(fw_features, "enabled", 2270 "inst-spec-barrier-ori31,31,0")) 2271 cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31; 2272 if (have_fw_feat(fw_features, "enabled", 2273 "fw-bcctrl-serialized")) 2274 cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED; 2275 if (have_fw_feat(fw_features, "enabled", 2276 "inst-l1d-flush-ori30,30,0")) 2277 cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30; 2278 if (have_fw_feat(fw_features, "enabled", 2279 "inst-l1d-flush-trig2")) 2280 cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2; 2281 if (have_fw_feat(fw_features, "enabled", 2282 "fw-l1d-thread-split")) 2283 cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV; 2284 if (have_fw_feat(fw_features, "enabled", 2285 "fw-count-cache-disabled")) 2286 cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS; 2287 if (have_fw_feat(fw_features, "enabled", 2288 "fw-count-cache-flush-bcctr2,0,0")) 2289 cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST; 2290 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 | 2291 KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED | 2292 KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 | 2293 KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 | 2294 KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV | 2295 KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS | 2296 KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST; 2297 2298 if (have_fw_feat(fw_features, "enabled", 2299 "speculation-policy-favor-security")) 2300 cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY; 2301 if (!have_fw_feat(fw_features, "disabled", 2302 "needs-l1d-flush-msr-pr-0-to-1")) 2303 cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR; 2304 if (!have_fw_feat(fw_features, "disabled", 2305 "needs-spec-barrier-for-bound-checks")) 2306 cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR; 2307 if (have_fw_feat(fw_features, "enabled", 2308 "needs-count-cache-flush-on-context-switch")) 2309 cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE; 2310 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY | 2311 KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR | 2312 KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR | 2313 KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE; 2314 2315 of_node_put(fw_features); 2316 } 2317 2318 return 0; 2319 } 2320 #endif 2321 2322 long kvm_arch_vm_ioctl(struct file *filp, 2323 unsigned int ioctl, unsigned long arg) 2324 { 2325 struct kvm *kvm __maybe_unused = filp->private_data; 2326 void __user *argp = (void __user *)arg; 2327 long r; 2328 2329 switch (ioctl) { 2330 case KVM_PPC_GET_PVINFO: { 2331 struct kvm_ppc_pvinfo pvinfo; 2332 memset(&pvinfo, 0, sizeof(pvinfo)); 2333 r = kvm_vm_ioctl_get_pvinfo(&pvinfo); 2334 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) { 2335 r = -EFAULT; 2336 goto out; 2337 } 2338 2339 break; 2340 } 2341 #ifdef CONFIG_SPAPR_TCE_IOMMU 2342 case KVM_CREATE_SPAPR_TCE_64: { 2343 struct kvm_create_spapr_tce_64 create_tce_64; 2344 2345 r = -EFAULT; 2346 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64))) 2347 goto out; 2348 if (create_tce_64.flags) { 2349 r = -EINVAL; 2350 goto out; 2351 } 2352 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64); 2353 goto out; 2354 } 2355 case KVM_CREATE_SPAPR_TCE: { 2356 struct kvm_create_spapr_tce create_tce; 2357 struct kvm_create_spapr_tce_64 create_tce_64; 2358 2359 r = -EFAULT; 2360 if (copy_from_user(&create_tce, argp, sizeof(create_tce))) 2361 goto out; 2362 2363 create_tce_64.liobn = create_tce.liobn; 2364 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K; 2365 create_tce_64.offset = 0; 2366 create_tce_64.size = create_tce.window_size >> 2367 IOMMU_PAGE_SHIFT_4K; 2368 create_tce_64.flags = 0; 2369 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64); 2370 goto out; 2371 } 2372 #endif 2373 #ifdef CONFIG_PPC_BOOK3S_64 2374 case KVM_PPC_GET_SMMU_INFO: { 2375 struct kvm_ppc_smmu_info info; 2376 struct kvm *kvm = filp->private_data; 2377 2378 memset(&info, 0, sizeof(info)); 2379 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info); 2380 if (r >= 0 && copy_to_user(argp, &info, sizeof(info))) 2381 r = -EFAULT; 2382 break; 2383 } 2384 case KVM_PPC_RTAS_DEFINE_TOKEN: { 2385 struct kvm *kvm = filp->private_data; 2386 2387 r = kvm_vm_ioctl_rtas_define_token(kvm, argp); 2388 break; 2389 } 2390 case KVM_PPC_CONFIGURE_V3_MMU: { 2391 struct kvm *kvm = filp->private_data; 2392 struct kvm_ppc_mmuv3_cfg cfg; 2393 2394 r = -EINVAL; 2395 if (!kvm->arch.kvm_ops->configure_mmu) 2396 goto out; 2397 r = -EFAULT; 2398 if (copy_from_user(&cfg, argp, sizeof(cfg))) 2399 goto out; 2400 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg); 2401 break; 2402 } 2403 case KVM_PPC_GET_RMMU_INFO: { 2404 struct kvm *kvm = filp->private_data; 2405 struct kvm_ppc_rmmu_info info; 2406 2407 r = -EINVAL; 2408 if (!kvm->arch.kvm_ops->get_rmmu_info) 2409 goto out; 2410 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info); 2411 if (r >= 0 && copy_to_user(argp, &info, sizeof(info))) 2412 r = -EFAULT; 2413 break; 2414 } 2415 case KVM_PPC_GET_CPU_CHAR: { 2416 struct kvm_ppc_cpu_char cpuchar; 2417 2418 r = kvmppc_get_cpu_char(&cpuchar); 2419 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar))) 2420 r = -EFAULT; 2421 break; 2422 } 2423 case KVM_PPC_SVM_OFF: { 2424 struct kvm *kvm = filp->private_data; 2425 2426 r = 0; 2427 if (!kvm->arch.kvm_ops->svm_off) 2428 goto out; 2429 2430 r = kvm->arch.kvm_ops->svm_off(kvm); 2431 break; 2432 } 2433 default: { 2434 struct kvm *kvm = filp->private_data; 2435 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg); 2436 } 2437 #else /* CONFIG_PPC_BOOK3S_64 */ 2438 default: 2439 r = -ENOTTY; 2440 #endif 2441 } 2442 out: 2443 return r; 2444 } 2445 2446 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)]; 2447 static unsigned long nr_lpids; 2448 2449 long kvmppc_alloc_lpid(void) 2450 { 2451 long lpid; 2452 2453 do { 2454 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS); 2455 if (lpid >= nr_lpids) { 2456 pr_err("%s: No LPIDs free\n", __func__); 2457 return -ENOMEM; 2458 } 2459 } while (test_and_set_bit(lpid, lpid_inuse)); 2460 2461 return lpid; 2462 } 2463 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid); 2464 2465 void kvmppc_claim_lpid(long lpid) 2466 { 2467 set_bit(lpid, lpid_inuse); 2468 } 2469 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid); 2470 2471 void kvmppc_free_lpid(long lpid) 2472 { 2473 clear_bit(lpid, lpid_inuse); 2474 } 2475 EXPORT_SYMBOL_GPL(kvmppc_free_lpid); 2476 2477 void kvmppc_init_lpid(unsigned long nr_lpids_param) 2478 { 2479 nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param); 2480 memset(lpid_inuse, 0, sizeof(lpid_inuse)); 2481 } 2482 EXPORT_SYMBOL_GPL(kvmppc_init_lpid); 2483 2484 int kvm_arch_init(void *opaque) 2485 { 2486 return 0; 2487 } 2488 2489 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr); 2490