1/* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License, version 2, as 4 * published by the Free Software Foundation. 5 * 6 * This program is distributed in the hope that it will be useful, 7 * but WITHOUT ANY WARRANTY; without even the implied warranty of 8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9 * GNU General Public License for more details. 10 * 11 * You should have received a copy of the GNU General Public License 12 * along with this program; if not, write to the Free Software 13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 14 * 15 * Copyright IBM Corp. 2007 16 * 17 * Authors: Hollis Blanchard <hollisb@us.ibm.com> 18 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> 19 */ 20 21#include <linux/errno.h> 22#include <linux/err.h> 23#include <linux/kvm_host.h> 24#include <linux/vmalloc.h> 25#include <linux/hrtimer.h> 26#include <linux/fs.h> 27#include <linux/slab.h> 28#include <linux/file.h> 29#include <linux/module.h> 30#include <asm/cputable.h> 31#include <asm/uaccess.h> 32#include <asm/kvm_ppc.h> 33#include <asm/tlbflush.h> 34#include <asm/cputhreads.h> 35#include <asm/irqflags.h> 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 43struct kvmppc_ops *kvmppc_hv_ops; 44EXPORT_SYMBOL_GPL(kvmppc_hv_ops); 45struct kvmppc_ops *kvmppc_pr_ops; 46EXPORT_SYMBOL_GPL(kvmppc_pr_ops); 47 48 49int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) 50{ 51 return !!(v->arch.pending_exceptions) || 52 v->requests; 53} 54 55int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) 56{ 57 return 1; 58} 59 60/* 61 * Common checks before entering the guest world. Call with interrupts 62 * disabled. 63 * 64 * returns: 65 * 66 * == 1 if we're ready to go into guest state 67 * <= 0 if we need to go back to the host with return value 68 */ 69int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) 70{ 71 int r; 72 73 WARN_ON(irqs_disabled()); 74 hard_irq_disable(); 75 76 while (true) { 77 if (need_resched()) { 78 local_irq_enable(); 79 cond_resched(); 80 hard_irq_disable(); 81 continue; 82 } 83 84 if (signal_pending(current)) { 85 kvmppc_account_exit(vcpu, SIGNAL_EXITS); 86 vcpu->run->exit_reason = KVM_EXIT_INTR; 87 r = -EINTR; 88 break; 89 } 90 91 vcpu->mode = IN_GUEST_MODE; 92 93 /* 94 * Reading vcpu->requests must happen after setting vcpu->mode, 95 * so we don't miss a request because the requester sees 96 * OUTSIDE_GUEST_MODE and assumes we'll be checking requests 97 * before next entering the guest (and thus doesn't IPI). 98 */ 99 smp_mb(); 100 101 if (vcpu->requests) { 102 /* Make sure we process requests preemptable */ 103 local_irq_enable(); 104 trace_kvm_check_requests(vcpu); 105 r = kvmppc_core_check_requests(vcpu); 106 hard_irq_disable(); 107 if (r > 0) 108 continue; 109 break; 110 } 111 112 if (kvmppc_core_prepare_to_enter(vcpu)) { 113 /* interrupts got enabled in between, so we 114 are back at square 1 */ 115 continue; 116 } 117 118 kvm_guest_enter(); 119 return 1; 120 } 121 122 /* return to host */ 123 local_irq_enable(); 124 return r; 125} 126EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter); 127 128#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE) 129static void kvmppc_swab_shared(struct kvm_vcpu *vcpu) 130{ 131 struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared; 132 int i; 133 134 shared->sprg0 = swab64(shared->sprg0); 135 shared->sprg1 = swab64(shared->sprg1); 136 shared->sprg2 = swab64(shared->sprg2); 137 shared->sprg3 = swab64(shared->sprg3); 138 shared->srr0 = swab64(shared->srr0); 139 shared->srr1 = swab64(shared->srr1); 140 shared->dar = swab64(shared->dar); 141 shared->msr = swab64(shared->msr); 142 shared->dsisr = swab32(shared->dsisr); 143 shared->int_pending = swab32(shared->int_pending); 144 for (i = 0; i < ARRAY_SIZE(shared->sr); i++) 145 shared->sr[i] = swab32(shared->sr[i]); 146} 147#endif 148 149int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) 150{ 151 int nr = kvmppc_get_gpr(vcpu, 11); 152 int r; 153 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3); 154 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4); 155 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5); 156 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6); 157 unsigned long r2 = 0; 158 159 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) { 160 /* 32 bit mode */ 161 param1 &= 0xffffffff; 162 param2 &= 0xffffffff; 163 param3 &= 0xffffffff; 164 param4 &= 0xffffffff; 165 } 166 167 switch (nr) { 168 case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE): 169 { 170#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE) 171 /* Book3S can be little endian, find it out here */ 172 int shared_big_endian = true; 173 if (vcpu->arch.intr_msr & MSR_LE) 174 shared_big_endian = false; 175 if (shared_big_endian != vcpu->arch.shared_big_endian) 176 kvmppc_swab_shared(vcpu); 177 vcpu->arch.shared_big_endian = shared_big_endian; 178#endif 179 180 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) { 181 /* 182 * Older versions of the Linux magic page code had 183 * a bug where they would map their trampoline code 184 * NX. If that's the case, remove !PR NX capability. 185 */ 186 vcpu->arch.disable_kernel_nx = true; 187 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 188 } 189 190 vcpu->arch.magic_page_pa = param1 & ~0xfffULL; 191 vcpu->arch.magic_page_ea = param2 & ~0xfffULL; 192 193#ifdef CONFIG_PPC_64K_PAGES 194 /* 195 * Make sure our 4k magic page is in the same window of a 64k 196 * page within the guest and within the host's page. 197 */ 198 if ((vcpu->arch.magic_page_pa & 0xf000) != 199 ((ulong)vcpu->arch.shared & 0xf000)) { 200 void *old_shared = vcpu->arch.shared; 201 ulong shared = (ulong)vcpu->arch.shared; 202 void *new_shared; 203 204 shared &= PAGE_MASK; 205 shared |= vcpu->arch.magic_page_pa & 0xf000; 206 new_shared = (void*)shared; 207 memcpy(new_shared, old_shared, 0x1000); 208 vcpu->arch.shared = new_shared; 209 } 210#endif 211 212 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7; 213 214 r = EV_SUCCESS; 215 break; 216 } 217 case KVM_HCALL_TOKEN(KVM_HC_FEATURES): 218 r = EV_SUCCESS; 219#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2) 220 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE); 221#endif 222 223 /* Second return value is in r4 */ 224 break; 225 case EV_HCALL_TOKEN(EV_IDLE): 226 r = EV_SUCCESS; 227 kvm_vcpu_block(vcpu); 228 clear_bit(KVM_REQ_UNHALT, &vcpu->requests); 229 break; 230 default: 231 r = EV_UNIMPLEMENTED; 232 break; 233 } 234 235 kvmppc_set_gpr(vcpu, 4, r2); 236 237 return r; 238} 239EXPORT_SYMBOL_GPL(kvmppc_kvm_pv); 240 241int kvmppc_sanity_check(struct kvm_vcpu *vcpu) 242{ 243 int r = false; 244 245 /* We have to know what CPU to virtualize */ 246 if (!vcpu->arch.pvr) 247 goto out; 248 249 /* PAPR only works with book3s_64 */ 250 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled) 251 goto out; 252 253 /* HV KVM can only do PAPR mode for now */ 254 if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm)) 255 goto out; 256 257#ifdef CONFIG_KVM_BOOKE_HV 258 if (!cpu_has_feature(CPU_FTR_EMB_HV)) 259 goto out; 260#endif 261 262 r = true; 263 264out: 265 vcpu->arch.sane = r; 266 return r ? 0 : -EINVAL; 267} 268EXPORT_SYMBOL_GPL(kvmppc_sanity_check); 269 270int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) 271{ 272 enum emulation_result er; 273 int r; 274 275 er = kvmppc_emulate_loadstore(vcpu); 276 switch (er) { 277 case EMULATE_DONE: 278 /* Future optimization: only reload non-volatiles if they were 279 * actually modified. */ 280 r = RESUME_GUEST_NV; 281 break; 282 case EMULATE_AGAIN: 283 r = RESUME_GUEST; 284 break; 285 case EMULATE_DO_MMIO: 286 run->exit_reason = KVM_EXIT_MMIO; 287 /* We must reload nonvolatiles because "update" load/store 288 * instructions modify register state. */ 289 /* Future optimization: only reload non-volatiles if they were 290 * actually modified. */ 291 r = RESUME_HOST_NV; 292 break; 293 case EMULATE_FAIL: 294 { 295 u32 last_inst; 296 297 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); 298 /* XXX Deliver Program interrupt to guest. */ 299 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst); 300 r = RESUME_HOST; 301 break; 302 } 303 default: 304 WARN_ON(1); 305 r = RESUME_GUEST; 306 } 307 308 return r; 309} 310EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio); 311 312int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, 313 bool data) 314{ 315 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK; 316 struct kvmppc_pte pte; 317 int r; 318 319 vcpu->stat.st++; 320 321 r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST, 322 XLATE_WRITE, &pte); 323 if (r < 0) 324 return r; 325 326 *eaddr = pte.raddr; 327 328 if (!pte.may_write) 329 return -EPERM; 330 331 /* Magic page override */ 332 if (kvmppc_supports_magic_page(vcpu) && mp_pa && 333 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) && 334 !(kvmppc_get_msr(vcpu) & MSR_PR)) { 335 void *magic = vcpu->arch.shared; 336 magic += pte.eaddr & 0xfff; 337 memcpy(magic, ptr, size); 338 return EMULATE_DONE; 339 } 340 341 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size)) 342 return EMULATE_DO_MMIO; 343 344 return EMULATE_DONE; 345} 346EXPORT_SYMBOL_GPL(kvmppc_st); 347 348int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, 349 bool data) 350{ 351 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK; 352 struct kvmppc_pte pte; 353 int rc; 354 355 vcpu->stat.ld++; 356 357 rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST, 358 XLATE_READ, &pte); 359 if (rc) 360 return rc; 361 362 *eaddr = pte.raddr; 363 364 if (!pte.may_read) 365 return -EPERM; 366 367 if (!data && !pte.may_execute) 368 return -ENOEXEC; 369 370 /* Magic page override */ 371 if (kvmppc_supports_magic_page(vcpu) && mp_pa && 372 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) && 373 !(kvmppc_get_msr(vcpu) & MSR_PR)) { 374 void *magic = vcpu->arch.shared; 375 magic += pte.eaddr & 0xfff; 376 memcpy(ptr, magic, size); 377 return EMULATE_DONE; 378 } 379 380 if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size)) 381 return EMULATE_DO_MMIO; 382 383 return EMULATE_DONE; 384} 385EXPORT_SYMBOL_GPL(kvmppc_ld); 386 387int kvm_arch_hardware_enable(void) 388{ 389 return 0; 390} 391 392int kvm_arch_hardware_setup(void) 393{ 394 return 0; 395} 396 397void kvm_arch_check_processor_compat(void *rtn) 398{ 399 *(int *)rtn = kvmppc_core_check_processor_compat(); 400} 401 402int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) 403{ 404 struct kvmppc_ops *kvm_ops = NULL; 405 /* 406 * if we have both HV and PR enabled, default is HV 407 */ 408 if (type == 0) { 409 if (kvmppc_hv_ops) 410 kvm_ops = kvmppc_hv_ops; 411 else 412 kvm_ops = kvmppc_pr_ops; 413 if (!kvm_ops) 414 goto err_out; 415 } else if (type == KVM_VM_PPC_HV) { 416 if (!kvmppc_hv_ops) 417 goto err_out; 418 kvm_ops = kvmppc_hv_ops; 419 } else if (type == KVM_VM_PPC_PR) { 420 if (!kvmppc_pr_ops) 421 goto err_out; 422 kvm_ops = kvmppc_pr_ops; 423 } else 424 goto err_out; 425 426 if (kvm_ops->owner && !try_module_get(kvm_ops->owner)) 427 return -ENOENT; 428 429 kvm->arch.kvm_ops = kvm_ops; 430 return kvmppc_core_init_vm(kvm); 431err_out: 432 return -EINVAL; 433} 434 435void kvm_arch_destroy_vm(struct kvm *kvm) 436{ 437 unsigned int i; 438 struct kvm_vcpu *vcpu; 439 440 kvm_for_each_vcpu(i, vcpu, kvm) 441 kvm_arch_vcpu_free(vcpu); 442 443 mutex_lock(&kvm->lock); 444 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) 445 kvm->vcpus[i] = NULL; 446 447 atomic_set(&kvm->online_vcpus, 0); 448 449 kvmppc_core_destroy_vm(kvm); 450 451 mutex_unlock(&kvm->lock); 452 453 /* drop the module reference */ 454 module_put(kvm->arch.kvm_ops->owner); 455} 456 457int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) 458{ 459 int r; 460 /* Assume we're using HV mode when the HV module is loaded */ 461 int hv_enabled = kvmppc_hv_ops ? 1 : 0; 462 463 if (kvm) { 464 /* 465 * Hooray - we know which VM type we're running on. Depend on 466 * that rather than the guess above. 467 */ 468 hv_enabled = is_kvmppc_hv_enabled(kvm); 469 } 470 471 switch (ext) { 472#ifdef CONFIG_BOOKE 473 case KVM_CAP_PPC_BOOKE_SREGS: 474 case KVM_CAP_PPC_BOOKE_WATCHDOG: 475 case KVM_CAP_PPC_EPR: 476#else 477 case KVM_CAP_PPC_SEGSTATE: 478 case KVM_CAP_PPC_HIOR: 479 case KVM_CAP_PPC_PAPR: 480#endif 481 case KVM_CAP_PPC_UNSET_IRQ: 482 case KVM_CAP_PPC_IRQ_LEVEL: 483 case KVM_CAP_ENABLE_CAP: 484 case KVM_CAP_ENABLE_CAP_VM: 485 case KVM_CAP_ONE_REG: 486 case KVM_CAP_IOEVENTFD: 487 case KVM_CAP_DEVICE_CTRL: 488 r = 1; 489 break; 490 case KVM_CAP_PPC_PAIRED_SINGLES: 491 case KVM_CAP_PPC_OSI: 492 case KVM_CAP_PPC_GET_PVINFO: 493#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) 494 case KVM_CAP_SW_TLB: 495#endif 496 /* We support this only for PR */ 497 r = !hv_enabled; 498 break; 499#ifdef CONFIG_KVM_MMIO 500 case KVM_CAP_COALESCED_MMIO: 501 r = KVM_COALESCED_MMIO_PAGE_OFFSET; 502 break; 503#endif 504#ifdef CONFIG_KVM_MPIC 505 case KVM_CAP_IRQ_MPIC: 506 r = 1; 507 break; 508#endif 509 510#ifdef CONFIG_PPC_BOOK3S_64 511 case KVM_CAP_SPAPR_TCE: 512 case KVM_CAP_PPC_ALLOC_HTAB: 513 case KVM_CAP_PPC_RTAS: 514 case KVM_CAP_PPC_FIXUP_HCALL: 515 case KVM_CAP_PPC_ENABLE_HCALL: 516#ifdef CONFIG_KVM_XICS 517 case KVM_CAP_IRQ_XICS: 518#endif 519 r = 1; 520 break; 521#endif /* CONFIG_PPC_BOOK3S_64 */ 522#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 523 case KVM_CAP_PPC_SMT: 524 if (hv_enabled) 525 r = threads_per_subcore; 526 else 527 r = 0; 528 break; 529 case KVM_CAP_PPC_RMA: 530 r = 0; 531 break; 532 case KVM_CAP_PPC_HWRNG: 533 r = kvmppc_hwrng_present(); 534 break; 535#endif 536 case KVM_CAP_SYNC_MMU: 537#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 538 r = hv_enabled; 539#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER) 540 r = 1; 541#else 542 r = 0; 543#endif 544 break; 545#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 546 case KVM_CAP_PPC_HTAB_FD: 547 r = hv_enabled; 548 break; 549#endif 550 case KVM_CAP_NR_VCPUS: 551 /* 552 * Recommending a number of CPUs is somewhat arbitrary; we 553 * return the number of present CPUs for -HV (since a host 554 * will have secondary threads "offline"), and for other KVM 555 * implementations just count online CPUs. 556 */ 557 if (hv_enabled) 558 r = num_present_cpus(); 559 else 560 r = num_online_cpus(); 561 break; 562 case KVM_CAP_MAX_VCPUS: 563 r = KVM_MAX_VCPUS; 564 break; 565#ifdef CONFIG_PPC_BOOK3S_64 566 case KVM_CAP_PPC_GET_SMMU_INFO: 567 r = 1; 568 break; 569#endif 570 default: 571 r = 0; 572 break; 573 } 574 return r; 575 576} 577 578long kvm_arch_dev_ioctl(struct file *filp, 579 unsigned int ioctl, unsigned long arg) 580{ 581 return -EINVAL; 582} 583 584void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, 585 struct kvm_memory_slot *dont) 586{ 587 kvmppc_core_free_memslot(kvm, free, dont); 588} 589 590int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, 591 unsigned long npages) 592{ 593 return kvmppc_core_create_memslot(kvm, slot, npages); 594} 595 596int kvm_arch_prepare_memory_region(struct kvm *kvm, 597 struct kvm_memory_slot *memslot, 598 struct kvm_userspace_memory_region *mem, 599 enum kvm_mr_change change) 600{ 601 return kvmppc_core_prepare_memory_region(kvm, memslot, mem); 602} 603 604void kvm_arch_commit_memory_region(struct kvm *kvm, 605 struct kvm_userspace_memory_region *mem, 606 const struct kvm_memory_slot *old, 607 enum kvm_mr_change change) 608{ 609 kvmppc_core_commit_memory_region(kvm, mem, old); 610} 611 612void kvm_arch_flush_shadow_memslot(struct kvm *kvm, 613 struct kvm_memory_slot *slot) 614{ 615 kvmppc_core_flush_memslot(kvm, slot); 616} 617 618struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) 619{ 620 struct kvm_vcpu *vcpu; 621 vcpu = kvmppc_core_vcpu_create(kvm, id); 622 if (!IS_ERR(vcpu)) { 623 vcpu->arch.wqp = &vcpu->wq; 624 kvmppc_create_vcpu_debugfs(vcpu, id); 625 } 626 return vcpu; 627} 628 629void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) 630{ 631} 632 633void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) 634{ 635 /* Make sure we're not using the vcpu anymore */ 636 hrtimer_cancel(&vcpu->arch.dec_timer); 637 638 kvmppc_remove_vcpu_debugfs(vcpu); 639 640 switch (vcpu->arch.irq_type) { 641 case KVMPPC_IRQ_MPIC: 642 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu); 643 break; 644 case KVMPPC_IRQ_XICS: 645 kvmppc_xics_free_icp(vcpu); 646 break; 647 } 648 649 kvmppc_core_vcpu_free(vcpu); 650} 651 652void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) 653{ 654 kvm_arch_vcpu_free(vcpu); 655} 656 657int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) 658{ 659 return kvmppc_core_pending_dec(vcpu); 660} 661 662enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer) 663{ 664 struct kvm_vcpu *vcpu; 665 666 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer); 667 kvmppc_decrementer_func(vcpu); 668 669 return HRTIMER_NORESTART; 670} 671 672int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) 673{ 674 int ret; 675 676 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); 677 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup; 678 vcpu->arch.dec_expires = ~(u64)0; 679 680#ifdef CONFIG_KVM_EXIT_TIMING 681 mutex_init(&vcpu->arch.exit_timing_lock); 682#endif 683 ret = kvmppc_subarch_vcpu_init(vcpu); 684 return ret; 685} 686 687void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) 688{ 689 kvmppc_mmu_destroy(vcpu); 690 kvmppc_subarch_vcpu_uninit(vcpu); 691} 692 693void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 694{ 695#ifdef CONFIG_BOOKE 696 /* 697 * vrsave (formerly usprg0) isn't used by Linux, but may 698 * be used by the guest. 699 * 700 * On non-booke this is associated with Altivec and 701 * is handled by code in book3s.c. 702 */ 703 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave); 704#endif 705 kvmppc_core_vcpu_load(vcpu, cpu); 706} 707 708void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) 709{ 710 kvmppc_core_vcpu_put(vcpu); 711#ifdef CONFIG_BOOKE 712 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); 713#endif 714} 715 716static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, 717 struct kvm_run *run) 718{ 719 u64 uninitialized_var(gpr); 720 721 if (run->mmio.len > sizeof(gpr)) { 722 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len); 723 return; 724 } 725 726 if (!vcpu->arch.mmio_host_swabbed) { 727 switch (run->mmio.len) { 728 case 8: gpr = *(u64 *)run->mmio.data; break; 729 case 4: gpr = *(u32 *)run->mmio.data; break; 730 case 2: gpr = *(u16 *)run->mmio.data; break; 731 case 1: gpr = *(u8 *)run->mmio.data; break; 732 } 733 } else { 734 switch (run->mmio.len) { 735 case 8: gpr = swab64(*(u64 *)run->mmio.data); break; 736 case 4: gpr = swab32(*(u32 *)run->mmio.data); break; 737 case 2: gpr = swab16(*(u16 *)run->mmio.data); break; 738 case 1: gpr = *(u8 *)run->mmio.data; break; 739 } 740 } 741 742 if (vcpu->arch.mmio_sign_extend) { 743 switch (run->mmio.len) { 744#ifdef CONFIG_PPC64 745 case 4: 746 gpr = (s64)(s32)gpr; 747 break; 748#endif 749 case 2: 750 gpr = (s64)(s16)gpr; 751 break; 752 case 1: 753 gpr = (s64)(s8)gpr; 754 break; 755 } 756 } 757 758 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); 759 760 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) { 761 case KVM_MMIO_REG_GPR: 762 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); 763 break; 764 case KVM_MMIO_REG_FPR: 765 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr; 766 break; 767#ifdef CONFIG_PPC_BOOK3S 768 case KVM_MMIO_REG_QPR: 769 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; 770 break; 771 case KVM_MMIO_REG_FQPR: 772 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr; 773 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; 774 break; 775#endif 776 default: 777 BUG(); 778 } 779} 780 781int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, 782 unsigned int rt, unsigned int bytes, 783 int is_default_endian) 784{ 785 int idx, ret; 786 bool host_swabbed; 787 788 /* Pity C doesn't have a logical XOR operator */ 789 if (kvmppc_need_byteswap(vcpu)) { 790 host_swabbed = is_default_endian; 791 } else { 792 host_swabbed = !is_default_endian; 793 } 794 795 if (bytes > sizeof(run->mmio.data)) { 796 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, 797 run->mmio.len); 798 } 799 800 run->mmio.phys_addr = vcpu->arch.paddr_accessed; 801 run->mmio.len = bytes; 802 run->mmio.is_write = 0; 803 804 vcpu->arch.io_gpr = rt; 805 vcpu->arch.mmio_host_swabbed = host_swabbed; 806 vcpu->mmio_needed = 1; 807 vcpu->mmio_is_write = 0; 808 vcpu->arch.mmio_sign_extend = 0; 809 810 idx = srcu_read_lock(&vcpu->kvm->srcu); 811 812 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr, 813 bytes, &run->mmio.data); 814 815 srcu_read_unlock(&vcpu->kvm->srcu, idx); 816 817 if (!ret) { 818 kvmppc_complete_mmio_load(vcpu, run); 819 vcpu->mmio_needed = 0; 820 return EMULATE_DONE; 821 } 822 823 return EMULATE_DO_MMIO; 824} 825EXPORT_SYMBOL_GPL(kvmppc_handle_load); 826 827/* Same as above, but sign extends */ 828int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu, 829 unsigned int rt, unsigned int bytes, 830 int is_default_endian) 831{ 832 int r; 833 834 vcpu->arch.mmio_sign_extend = 1; 835 r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian); 836 837 return r; 838} 839 840int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, 841 u64 val, unsigned int bytes, int is_default_endian) 842{ 843 void *data = run->mmio.data; 844 int idx, ret; 845 bool host_swabbed; 846 847 /* Pity C doesn't have a logical XOR operator */ 848 if (kvmppc_need_byteswap(vcpu)) { 849 host_swabbed = is_default_endian; 850 } else { 851 host_swabbed = !is_default_endian; 852 } 853 854 if (bytes > sizeof(run->mmio.data)) { 855 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, 856 run->mmio.len); 857 } 858 859 run->mmio.phys_addr = vcpu->arch.paddr_accessed; 860 run->mmio.len = bytes; 861 run->mmio.is_write = 1; 862 vcpu->mmio_needed = 1; 863 vcpu->mmio_is_write = 1; 864 865 /* Store the value at the lowest bytes in 'data'. */ 866 if (!host_swabbed) { 867 switch (bytes) { 868 case 8: *(u64 *)data = val; break; 869 case 4: *(u32 *)data = val; break; 870 case 2: *(u16 *)data = val; break; 871 case 1: *(u8 *)data = val; break; 872 } 873 } else { 874 switch (bytes) { 875 case 8: *(u64 *)data = swab64(val); break; 876 case 4: *(u32 *)data = swab32(val); break; 877 case 2: *(u16 *)data = swab16(val); break; 878 case 1: *(u8 *)data = val; break; 879 } 880 } 881 882 idx = srcu_read_lock(&vcpu->kvm->srcu); 883 884 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr, 885 bytes, &run->mmio.data); 886 887 srcu_read_unlock(&vcpu->kvm->srcu, idx); 888 889 if (!ret) { 890 vcpu->mmio_needed = 0; 891 return EMULATE_DONE; 892 } 893 894 return EMULATE_DO_MMIO; 895} 896EXPORT_SYMBOL_GPL(kvmppc_handle_store); 897 898int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 899{ 900 int r = 0; 901 union kvmppc_one_reg val; 902 int size; 903 904 size = one_reg_size(reg->id); 905 if (size > sizeof(val)) 906 return -EINVAL; 907 908 r = kvmppc_get_one_reg(vcpu, reg->id, &val); 909 if (r == -EINVAL) { 910 r = 0; 911 switch (reg->id) { 912#ifdef CONFIG_ALTIVEC 913 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31: 914 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 915 r = -ENXIO; 916 break; 917 } 918 val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0]; 919 break; 920 case KVM_REG_PPC_VSCR: 921 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 922 r = -ENXIO; 923 break; 924 } 925 val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]); 926 break; 927 case KVM_REG_PPC_VRSAVE: 928 val = get_reg_val(reg->id, vcpu->arch.vrsave); 929 break; 930#endif /* CONFIG_ALTIVEC */ 931 default: 932 r = -EINVAL; 933 break; 934 } 935 } 936 937 if (r) 938 return r; 939 940 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size)) 941 r = -EFAULT; 942 943 return r; 944} 945 946int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 947{ 948 int r; 949 union kvmppc_one_reg val; 950 int size; 951 952 size = one_reg_size(reg->id); 953 if (size > sizeof(val)) 954 return -EINVAL; 955 956 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size)) 957 return -EFAULT; 958 959 r = kvmppc_set_one_reg(vcpu, reg->id, &val); 960 if (r == -EINVAL) { 961 r = 0; 962 switch (reg->id) { 963#ifdef CONFIG_ALTIVEC 964 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31: 965 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 966 r = -ENXIO; 967 break; 968 } 969 vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval; 970 break; 971 case KVM_REG_PPC_VSCR: 972 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 973 r = -ENXIO; 974 break; 975 } 976 vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val); 977 break; 978 case KVM_REG_PPC_VRSAVE: 979 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 980 r = -ENXIO; 981 break; 982 } 983 vcpu->arch.vrsave = set_reg_val(reg->id, val); 984 break; 985#endif /* CONFIG_ALTIVEC */ 986 default: 987 r = -EINVAL; 988 break; 989 } 990 } 991 992 return r; 993} 994 995int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) 996{ 997 int r; 998 sigset_t sigsaved; 999 1000 if (vcpu->sigset_active) 1001 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); 1002 1003 if (vcpu->mmio_needed) { 1004 if (!vcpu->mmio_is_write) 1005 kvmppc_complete_mmio_load(vcpu, run); 1006 vcpu->mmio_needed = 0; 1007 } else if (vcpu->arch.osi_needed) { 1008 u64 *gprs = run->osi.gprs; 1009 int i; 1010 1011 for (i = 0; i < 32; i++) 1012 kvmppc_set_gpr(vcpu, i, gprs[i]); 1013 vcpu->arch.osi_needed = 0; 1014 } else if (vcpu->arch.hcall_needed) { 1015 int i; 1016 1017 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret); 1018 for (i = 0; i < 9; ++i) 1019 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]); 1020 vcpu->arch.hcall_needed = 0; 1021#ifdef CONFIG_BOOKE 1022 } else if (vcpu->arch.epr_needed) { 1023 kvmppc_set_epr(vcpu, run->epr.epr); 1024 vcpu->arch.epr_needed = 0; 1025#endif 1026 } 1027 1028 r = kvmppc_vcpu_run(run, vcpu); 1029 1030 if (vcpu->sigset_active) 1031 sigprocmask(SIG_SETMASK, &sigsaved, NULL); 1032 1033 return r; 1034} 1035 1036int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) 1037{ 1038 if (irq->irq == KVM_INTERRUPT_UNSET) { 1039 kvmppc_core_dequeue_external(vcpu); 1040 return 0; 1041 } 1042 1043 kvmppc_core_queue_external(vcpu, irq); 1044 1045 kvm_vcpu_kick(vcpu); 1046 1047 return 0; 1048} 1049 1050static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, 1051 struct kvm_enable_cap *cap) 1052{ 1053 int r; 1054 1055 if (cap->flags) 1056 return -EINVAL; 1057 1058 switch (cap->cap) { 1059 case KVM_CAP_PPC_OSI: 1060 r = 0; 1061 vcpu->arch.osi_enabled = true; 1062 break; 1063 case KVM_CAP_PPC_PAPR: 1064 r = 0; 1065 vcpu->arch.papr_enabled = true; 1066 break; 1067 case KVM_CAP_PPC_EPR: 1068 r = 0; 1069 if (cap->args[0]) 1070 vcpu->arch.epr_flags |= KVMPPC_EPR_USER; 1071 else 1072 vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER; 1073 break; 1074#ifdef CONFIG_BOOKE 1075 case KVM_CAP_PPC_BOOKE_WATCHDOG: 1076 r = 0; 1077 vcpu->arch.watchdog_enabled = true; 1078 break; 1079#endif 1080#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) 1081 case KVM_CAP_SW_TLB: { 1082 struct kvm_config_tlb cfg; 1083 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0]; 1084 1085 r = -EFAULT; 1086 if (copy_from_user(&cfg, user_ptr, sizeof(cfg))) 1087 break; 1088 1089 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg); 1090 break; 1091 } 1092#endif 1093#ifdef CONFIG_KVM_MPIC 1094 case KVM_CAP_IRQ_MPIC: { 1095 struct fd f; 1096 struct kvm_device *dev; 1097 1098 r = -EBADF; 1099 f = fdget(cap->args[0]); 1100 if (!f.file) 1101 break; 1102 1103 r = -EPERM; 1104 dev = kvm_device_from_filp(f.file); 1105 if (dev) 1106 r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]); 1107 1108 fdput(f); 1109 break; 1110 } 1111#endif 1112#ifdef CONFIG_KVM_XICS 1113 case KVM_CAP_IRQ_XICS: { 1114 struct fd f; 1115 struct kvm_device *dev; 1116 1117 r = -EBADF; 1118 f = fdget(cap->args[0]); 1119 if (!f.file) 1120 break; 1121 1122 r = -EPERM; 1123 dev = kvm_device_from_filp(f.file); 1124 if (dev) 1125 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]); 1126 1127 fdput(f); 1128 break; 1129 } 1130#endif /* CONFIG_KVM_XICS */ 1131 default: 1132 r = -EINVAL; 1133 break; 1134 } 1135 1136 if (!r) 1137 r = kvmppc_sanity_check(vcpu); 1138 1139 return r; 1140} 1141 1142int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 1143 struct kvm_mp_state *mp_state) 1144{ 1145 return -EINVAL; 1146} 1147 1148int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 1149 struct kvm_mp_state *mp_state) 1150{ 1151 return -EINVAL; 1152} 1153 1154long kvm_arch_vcpu_ioctl(struct file *filp, 1155 unsigned int ioctl, unsigned long arg) 1156{ 1157 struct kvm_vcpu *vcpu = filp->private_data; 1158 void __user *argp = (void __user *)arg; 1159 long r; 1160 1161 switch (ioctl) { 1162 case KVM_INTERRUPT: { 1163 struct kvm_interrupt irq; 1164 r = -EFAULT; 1165 if (copy_from_user(&irq, argp, sizeof(irq))) 1166 goto out; 1167 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); 1168 goto out; 1169 } 1170 1171 case KVM_ENABLE_CAP: 1172 { 1173 struct kvm_enable_cap cap; 1174 r = -EFAULT; 1175 if (copy_from_user(&cap, argp, sizeof(cap))) 1176 goto out; 1177 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); 1178 break; 1179 } 1180 1181 case KVM_SET_ONE_REG: 1182 case KVM_GET_ONE_REG: 1183 { 1184 struct kvm_one_reg reg; 1185 r = -EFAULT; 1186 if (copy_from_user(®, argp, sizeof(reg))) 1187 goto out; 1188 if (ioctl == KVM_SET_ONE_REG) 1189 r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®); 1190 else 1191 r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®); 1192 break; 1193 } 1194 1195#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) 1196 case KVM_DIRTY_TLB: { 1197 struct kvm_dirty_tlb dirty; 1198 r = -EFAULT; 1199 if (copy_from_user(&dirty, argp, sizeof(dirty))) 1200 goto out; 1201 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty); 1202 break; 1203 } 1204#endif 1205 default: 1206 r = -EINVAL; 1207 } 1208 1209out: 1210 return r; 1211} 1212 1213int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) 1214{ 1215 return VM_FAULT_SIGBUS; 1216} 1217 1218static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) 1219{ 1220 u32 inst_nop = 0x60000000; 1221#ifdef CONFIG_KVM_BOOKE_HV 1222 u32 inst_sc1 = 0x44000022; 1223 pvinfo->hcall[0] = cpu_to_be32(inst_sc1); 1224 pvinfo->hcall[1] = cpu_to_be32(inst_nop); 1225 pvinfo->hcall[2] = cpu_to_be32(inst_nop); 1226 pvinfo->hcall[3] = cpu_to_be32(inst_nop); 1227#else 1228 u32 inst_lis = 0x3c000000; 1229 u32 inst_ori = 0x60000000; 1230 u32 inst_sc = 0x44000002; 1231 u32 inst_imm_mask = 0xffff; 1232 1233 /* 1234 * The hypercall to get into KVM from within guest context is as 1235 * follows: 1236 * 1237 * lis r0, r0, KVM_SC_MAGIC_R0@h 1238 * ori r0, KVM_SC_MAGIC_R0@l 1239 * sc 1240 * nop 1241 */ 1242 pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask)); 1243 pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask)); 1244 pvinfo->hcall[2] = cpu_to_be32(inst_sc); 1245 pvinfo->hcall[3] = cpu_to_be32(inst_nop); 1246#endif 1247 1248 pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE; 1249 1250 return 0; 1251} 1252 1253int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, 1254 bool line_status) 1255{ 1256 if (!irqchip_in_kernel(kvm)) 1257 return -ENXIO; 1258 1259 irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1260 irq_event->irq, irq_event->level, 1261 line_status); 1262 return 0; 1263} 1264 1265 1266static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, 1267 struct kvm_enable_cap *cap) 1268{ 1269 int r; 1270 1271 if (cap->flags) 1272 return -EINVAL; 1273 1274 switch (cap->cap) { 1275#ifdef CONFIG_KVM_BOOK3S_64_HANDLER 1276 case KVM_CAP_PPC_ENABLE_HCALL: { 1277 unsigned long hcall = cap->args[0]; 1278 1279 r = -EINVAL; 1280 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) || 1281 cap->args[1] > 1) 1282 break; 1283 if (!kvmppc_book3s_hcall_implemented(kvm, hcall)) 1284 break; 1285 if (cap->args[1]) 1286 set_bit(hcall / 4, kvm->arch.enabled_hcalls); 1287 else 1288 clear_bit(hcall / 4, kvm->arch.enabled_hcalls); 1289 r = 0; 1290 break; 1291 } 1292#endif 1293 default: 1294 r = -EINVAL; 1295 break; 1296 } 1297 1298 return r; 1299} 1300 1301long kvm_arch_vm_ioctl(struct file *filp, 1302 unsigned int ioctl, unsigned long arg) 1303{ 1304 struct kvm *kvm __maybe_unused = filp->private_data; 1305 void __user *argp = (void __user *)arg; 1306 long r; 1307 1308 switch (ioctl) { 1309 case KVM_PPC_GET_PVINFO: { 1310 struct kvm_ppc_pvinfo pvinfo; 1311 memset(&pvinfo, 0, sizeof(pvinfo)); 1312 r = kvm_vm_ioctl_get_pvinfo(&pvinfo); 1313 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) { 1314 r = -EFAULT; 1315 goto out; 1316 } 1317 1318 break; 1319 } 1320 case KVM_ENABLE_CAP: 1321 { 1322 struct kvm_enable_cap cap; 1323 r = -EFAULT; 1324 if (copy_from_user(&cap, argp, sizeof(cap))) 1325 goto out; 1326 r = kvm_vm_ioctl_enable_cap(kvm, &cap); 1327 break; 1328 } 1329#ifdef CONFIG_PPC_BOOK3S_64 1330 case KVM_CREATE_SPAPR_TCE: { 1331 struct kvm_create_spapr_tce create_tce; 1332 1333 r = -EFAULT; 1334 if (copy_from_user(&create_tce, argp, sizeof(create_tce))) 1335 goto out; 1336 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce); 1337 goto out; 1338 } 1339 case KVM_PPC_GET_SMMU_INFO: { 1340 struct kvm_ppc_smmu_info info; 1341 struct kvm *kvm = filp->private_data; 1342 1343 memset(&info, 0, sizeof(info)); 1344 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info); 1345 if (r >= 0 && copy_to_user(argp, &info, sizeof(info))) 1346 r = -EFAULT; 1347 break; 1348 } 1349 case KVM_PPC_RTAS_DEFINE_TOKEN: { 1350 struct kvm *kvm = filp->private_data; 1351 1352 r = kvm_vm_ioctl_rtas_define_token(kvm, argp); 1353 break; 1354 } 1355 default: { 1356 struct kvm *kvm = filp->private_data; 1357 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg); 1358 } 1359#else /* CONFIG_PPC_BOOK3S_64 */ 1360 default: 1361 r = -ENOTTY; 1362#endif 1363 } 1364out: 1365 return r; 1366} 1367 1368static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)]; 1369static unsigned long nr_lpids; 1370 1371long kvmppc_alloc_lpid(void) 1372{ 1373 long lpid; 1374 1375 do { 1376 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS); 1377 if (lpid >= nr_lpids) { 1378 pr_err("%s: No LPIDs free\n", __func__); 1379 return -ENOMEM; 1380 } 1381 } while (test_and_set_bit(lpid, lpid_inuse)); 1382 1383 return lpid; 1384} 1385EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid); 1386 1387void kvmppc_claim_lpid(long lpid) 1388{ 1389 set_bit(lpid, lpid_inuse); 1390} 1391EXPORT_SYMBOL_GPL(kvmppc_claim_lpid); 1392 1393void kvmppc_free_lpid(long lpid) 1394{ 1395 clear_bit(lpid, lpid_inuse); 1396} 1397EXPORT_SYMBOL_GPL(kvmppc_free_lpid); 1398 1399void kvmppc_init_lpid(unsigned long nr_lpids_param) 1400{ 1401 nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param); 1402 memset(lpid_inuse, 0, sizeof(lpid_inuse)); 1403} 1404EXPORT_SYMBOL_GPL(kvmppc_init_lpid); 1405 1406int kvm_arch_init(void *opaque) 1407{ 1408 return 0; 1409} 1410 1411EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr); 1412