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 <asm/cputable.h> 29 #include <asm/uaccess.h> 30 #include <asm/kvm_ppc.h> 31 #include <asm/tlbflush.h> 32 #include <asm/cputhreads.h> 33 #include "timing.h" 34 #include "../mm/mmu_decl.h" 35 36 #define CREATE_TRACE_POINTS 37 #include "trace.h" 38 39 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) 40 { 41 return !(v->arch.shared->msr & MSR_WE) || 42 !!(v->arch.pending_exceptions) || 43 v->requests; 44 } 45 46 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) 47 { 48 int nr = kvmppc_get_gpr(vcpu, 11); 49 int r; 50 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3); 51 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4); 52 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5); 53 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6); 54 unsigned long r2 = 0; 55 56 if (!(vcpu->arch.shared->msr & MSR_SF)) { 57 /* 32 bit mode */ 58 param1 &= 0xffffffff; 59 param2 &= 0xffffffff; 60 param3 &= 0xffffffff; 61 param4 &= 0xffffffff; 62 } 63 64 switch (nr) { 65 case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE: 66 { 67 vcpu->arch.magic_page_pa = param1; 68 vcpu->arch.magic_page_ea = param2; 69 70 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7; 71 72 r = HC_EV_SUCCESS; 73 break; 74 } 75 case HC_VENDOR_KVM | KVM_HC_FEATURES: 76 r = HC_EV_SUCCESS; 77 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500) 78 /* XXX Missing magic page on 44x */ 79 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE); 80 #endif 81 82 /* Second return value is in r4 */ 83 break; 84 default: 85 r = HC_EV_UNIMPLEMENTED; 86 break; 87 } 88 89 kvmppc_set_gpr(vcpu, 4, r2); 90 91 return r; 92 } 93 94 int kvmppc_sanity_check(struct kvm_vcpu *vcpu) 95 { 96 int r = false; 97 98 /* We have to know what CPU to virtualize */ 99 if (!vcpu->arch.pvr) 100 goto out; 101 102 /* PAPR only works with book3s_64 */ 103 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled) 104 goto out; 105 106 #ifdef CONFIG_KVM_BOOK3S_64_HV 107 /* HV KVM can only do PAPR mode for now */ 108 if (!vcpu->arch.papr_enabled) 109 goto out; 110 #endif 111 112 r = true; 113 114 out: 115 vcpu->arch.sane = r; 116 return r ? 0 : -EINVAL; 117 } 118 119 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) 120 { 121 enum emulation_result er; 122 int r; 123 124 er = kvmppc_emulate_instruction(run, vcpu); 125 switch (er) { 126 case EMULATE_DONE: 127 /* Future optimization: only reload non-volatiles if they were 128 * actually modified. */ 129 r = RESUME_GUEST_NV; 130 break; 131 case EMULATE_DO_MMIO: 132 run->exit_reason = KVM_EXIT_MMIO; 133 /* We must reload nonvolatiles because "update" load/store 134 * instructions modify register state. */ 135 /* Future optimization: only reload non-volatiles if they were 136 * actually modified. */ 137 r = RESUME_HOST_NV; 138 break; 139 case EMULATE_FAIL: 140 /* XXX Deliver Program interrupt to guest. */ 141 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__, 142 kvmppc_get_last_inst(vcpu)); 143 r = RESUME_HOST; 144 break; 145 default: 146 BUG(); 147 } 148 149 return r; 150 } 151 152 int kvm_arch_hardware_enable(void *garbage) 153 { 154 return 0; 155 } 156 157 void kvm_arch_hardware_disable(void *garbage) 158 { 159 } 160 161 int kvm_arch_hardware_setup(void) 162 { 163 return 0; 164 } 165 166 void kvm_arch_hardware_unsetup(void) 167 { 168 } 169 170 void kvm_arch_check_processor_compat(void *rtn) 171 { 172 *(int *)rtn = kvmppc_core_check_processor_compat(); 173 } 174 175 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) 176 { 177 if (type) 178 return -EINVAL; 179 180 return kvmppc_core_init_vm(kvm); 181 } 182 183 void kvm_arch_destroy_vm(struct kvm *kvm) 184 { 185 unsigned int i; 186 struct kvm_vcpu *vcpu; 187 188 kvm_for_each_vcpu(i, vcpu, kvm) 189 kvm_arch_vcpu_free(vcpu); 190 191 mutex_lock(&kvm->lock); 192 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) 193 kvm->vcpus[i] = NULL; 194 195 atomic_set(&kvm->online_vcpus, 0); 196 197 kvmppc_core_destroy_vm(kvm); 198 199 mutex_unlock(&kvm->lock); 200 } 201 202 void kvm_arch_sync_events(struct kvm *kvm) 203 { 204 } 205 206 int kvm_dev_ioctl_check_extension(long ext) 207 { 208 int r; 209 210 switch (ext) { 211 #ifdef CONFIG_BOOKE 212 case KVM_CAP_PPC_BOOKE_SREGS: 213 #else 214 case KVM_CAP_PPC_SEGSTATE: 215 case KVM_CAP_PPC_HIOR: 216 case KVM_CAP_PPC_PAPR: 217 #endif 218 case KVM_CAP_PPC_UNSET_IRQ: 219 case KVM_CAP_PPC_IRQ_LEVEL: 220 case KVM_CAP_ENABLE_CAP: 221 case KVM_CAP_ONE_REG: 222 r = 1; 223 break; 224 #ifndef CONFIG_KVM_BOOK3S_64_HV 225 case KVM_CAP_PPC_PAIRED_SINGLES: 226 case KVM_CAP_PPC_OSI: 227 case KVM_CAP_PPC_GET_PVINFO: 228 #ifdef CONFIG_KVM_E500 229 case KVM_CAP_SW_TLB: 230 #endif 231 r = 1; 232 break; 233 case KVM_CAP_COALESCED_MMIO: 234 r = KVM_COALESCED_MMIO_PAGE_OFFSET; 235 break; 236 #endif 237 #ifdef CONFIG_KVM_BOOK3S_64_HV 238 case KVM_CAP_SPAPR_TCE: 239 r = 1; 240 break; 241 case KVM_CAP_PPC_SMT: 242 r = threads_per_core; 243 break; 244 case KVM_CAP_PPC_RMA: 245 r = 1; 246 /* PPC970 requires an RMA */ 247 if (cpu_has_feature(CPU_FTR_ARCH_201)) 248 r = 2; 249 break; 250 case KVM_CAP_SYNC_MMU: 251 r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0; 252 break; 253 #endif 254 case KVM_CAP_NR_VCPUS: 255 /* 256 * Recommending a number of CPUs is somewhat arbitrary; we 257 * return the number of present CPUs for -HV (since a host 258 * will have secondary threads "offline"), and for other KVM 259 * implementations just count online CPUs. 260 */ 261 #ifdef CONFIG_KVM_BOOK3S_64_HV 262 r = num_present_cpus(); 263 #else 264 r = num_online_cpus(); 265 #endif 266 break; 267 case KVM_CAP_MAX_VCPUS: 268 r = KVM_MAX_VCPUS; 269 break; 270 default: 271 r = 0; 272 break; 273 } 274 return r; 275 276 } 277 278 long kvm_arch_dev_ioctl(struct file *filp, 279 unsigned int ioctl, unsigned long arg) 280 { 281 return -EINVAL; 282 } 283 284 void kvm_arch_free_memslot(struct kvm_memory_slot *free, 285 struct kvm_memory_slot *dont) 286 { 287 } 288 289 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) 290 { 291 return 0; 292 } 293 294 int kvm_arch_prepare_memory_region(struct kvm *kvm, 295 struct kvm_memory_slot *memslot, 296 struct kvm_memory_slot old, 297 struct kvm_userspace_memory_region *mem, 298 int user_alloc) 299 { 300 return kvmppc_core_prepare_memory_region(kvm, mem); 301 } 302 303 void kvm_arch_commit_memory_region(struct kvm *kvm, 304 struct kvm_userspace_memory_region *mem, 305 struct kvm_memory_slot old, 306 int user_alloc) 307 { 308 kvmppc_core_commit_memory_region(kvm, mem); 309 } 310 311 312 void kvm_arch_flush_shadow(struct kvm *kvm) 313 { 314 } 315 316 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) 317 { 318 struct kvm_vcpu *vcpu; 319 vcpu = kvmppc_core_vcpu_create(kvm, id); 320 if (!IS_ERR(vcpu)) { 321 vcpu->arch.wqp = &vcpu->wq; 322 kvmppc_create_vcpu_debugfs(vcpu, id); 323 } 324 return vcpu; 325 } 326 327 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) 328 { 329 /* Make sure we're not using the vcpu anymore */ 330 hrtimer_cancel(&vcpu->arch.dec_timer); 331 tasklet_kill(&vcpu->arch.tasklet); 332 333 kvmppc_remove_vcpu_debugfs(vcpu); 334 kvmppc_core_vcpu_free(vcpu); 335 } 336 337 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) 338 { 339 kvm_arch_vcpu_free(vcpu); 340 } 341 342 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) 343 { 344 return kvmppc_core_pending_dec(vcpu); 345 } 346 347 /* 348 * low level hrtimer wake routine. Because this runs in hardirq context 349 * we schedule a tasklet to do the real work. 350 */ 351 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer) 352 { 353 struct kvm_vcpu *vcpu; 354 355 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer); 356 tasklet_schedule(&vcpu->arch.tasklet); 357 358 return HRTIMER_NORESTART; 359 } 360 361 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) 362 { 363 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); 364 tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu); 365 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup; 366 vcpu->arch.dec_expires = ~(u64)0; 367 368 #ifdef CONFIG_KVM_EXIT_TIMING 369 mutex_init(&vcpu->arch.exit_timing_lock); 370 #endif 371 372 return 0; 373 } 374 375 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) 376 { 377 kvmppc_mmu_destroy(vcpu); 378 } 379 380 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 381 { 382 #ifdef CONFIG_BOOKE 383 /* 384 * vrsave (formerly usprg0) isn't used by Linux, but may 385 * be used by the guest. 386 * 387 * On non-booke this is associated with Altivec and 388 * is handled by code in book3s.c. 389 */ 390 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave); 391 #endif 392 kvmppc_core_vcpu_load(vcpu, cpu); 393 vcpu->cpu = smp_processor_id(); 394 } 395 396 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) 397 { 398 kvmppc_core_vcpu_put(vcpu); 399 #ifdef CONFIG_BOOKE 400 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); 401 #endif 402 vcpu->cpu = -1; 403 } 404 405 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 406 struct kvm_guest_debug *dbg) 407 { 408 return -EINVAL; 409 } 410 411 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu, 412 struct kvm_run *run) 413 { 414 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data); 415 } 416 417 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, 418 struct kvm_run *run) 419 { 420 u64 uninitialized_var(gpr); 421 422 if (run->mmio.len > sizeof(gpr)) { 423 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len); 424 return; 425 } 426 427 if (vcpu->arch.mmio_is_bigendian) { 428 switch (run->mmio.len) { 429 case 8: gpr = *(u64 *)run->mmio.data; break; 430 case 4: gpr = *(u32 *)run->mmio.data; break; 431 case 2: gpr = *(u16 *)run->mmio.data; break; 432 case 1: gpr = *(u8 *)run->mmio.data; break; 433 } 434 } else { 435 /* Convert BE data from userland back to LE. */ 436 switch (run->mmio.len) { 437 case 4: gpr = ld_le32((u32 *)run->mmio.data); break; 438 case 2: gpr = ld_le16((u16 *)run->mmio.data); break; 439 case 1: gpr = *(u8 *)run->mmio.data; break; 440 } 441 } 442 443 if (vcpu->arch.mmio_sign_extend) { 444 switch (run->mmio.len) { 445 #ifdef CONFIG_PPC64 446 case 4: 447 gpr = (s64)(s32)gpr; 448 break; 449 #endif 450 case 2: 451 gpr = (s64)(s16)gpr; 452 break; 453 case 1: 454 gpr = (s64)(s8)gpr; 455 break; 456 } 457 } 458 459 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); 460 461 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) { 462 case KVM_MMIO_REG_GPR: 463 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); 464 break; 465 case KVM_MMIO_REG_FPR: 466 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; 467 break; 468 #ifdef CONFIG_PPC_BOOK3S 469 case KVM_MMIO_REG_QPR: 470 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; 471 break; 472 case KVM_MMIO_REG_FQPR: 473 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; 474 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; 475 break; 476 #endif 477 default: 478 BUG(); 479 } 480 } 481 482 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, 483 unsigned int rt, unsigned int bytes, int is_bigendian) 484 { 485 if (bytes > sizeof(run->mmio.data)) { 486 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, 487 run->mmio.len); 488 } 489 490 run->mmio.phys_addr = vcpu->arch.paddr_accessed; 491 run->mmio.len = bytes; 492 run->mmio.is_write = 0; 493 494 vcpu->arch.io_gpr = rt; 495 vcpu->arch.mmio_is_bigendian = is_bigendian; 496 vcpu->mmio_needed = 1; 497 vcpu->mmio_is_write = 0; 498 vcpu->arch.mmio_sign_extend = 0; 499 500 return EMULATE_DO_MMIO; 501 } 502 503 /* Same as above, but sign extends */ 504 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu, 505 unsigned int rt, unsigned int bytes, int is_bigendian) 506 { 507 int r; 508 509 r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian); 510 vcpu->arch.mmio_sign_extend = 1; 511 512 return r; 513 } 514 515 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, 516 u64 val, unsigned int bytes, int is_bigendian) 517 { 518 void *data = run->mmio.data; 519 520 if (bytes > sizeof(run->mmio.data)) { 521 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, 522 run->mmio.len); 523 } 524 525 run->mmio.phys_addr = vcpu->arch.paddr_accessed; 526 run->mmio.len = bytes; 527 run->mmio.is_write = 1; 528 vcpu->mmio_needed = 1; 529 vcpu->mmio_is_write = 1; 530 531 /* Store the value at the lowest bytes in 'data'. */ 532 if (is_bigendian) { 533 switch (bytes) { 534 case 8: *(u64 *)data = val; break; 535 case 4: *(u32 *)data = val; break; 536 case 2: *(u16 *)data = val; break; 537 case 1: *(u8 *)data = val; break; 538 } 539 } else { 540 /* Store LE value into 'data'. */ 541 switch (bytes) { 542 case 4: st_le32(data, val); break; 543 case 2: st_le16(data, val); break; 544 case 1: *(u8 *)data = val; break; 545 } 546 } 547 548 return EMULATE_DO_MMIO; 549 } 550 551 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) 552 { 553 int r; 554 sigset_t sigsaved; 555 556 if (vcpu->sigset_active) 557 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); 558 559 if (vcpu->mmio_needed) { 560 if (!vcpu->mmio_is_write) 561 kvmppc_complete_mmio_load(vcpu, run); 562 vcpu->mmio_needed = 0; 563 } else if (vcpu->arch.dcr_needed) { 564 if (!vcpu->arch.dcr_is_write) 565 kvmppc_complete_dcr_load(vcpu, run); 566 vcpu->arch.dcr_needed = 0; 567 } else if (vcpu->arch.osi_needed) { 568 u64 *gprs = run->osi.gprs; 569 int i; 570 571 for (i = 0; i < 32; i++) 572 kvmppc_set_gpr(vcpu, i, gprs[i]); 573 vcpu->arch.osi_needed = 0; 574 } else if (vcpu->arch.hcall_needed) { 575 int i; 576 577 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret); 578 for (i = 0; i < 9; ++i) 579 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]); 580 vcpu->arch.hcall_needed = 0; 581 } 582 583 r = kvmppc_vcpu_run(run, vcpu); 584 585 if (vcpu->sigset_active) 586 sigprocmask(SIG_SETMASK, &sigsaved, NULL); 587 588 return r; 589 } 590 591 void kvm_vcpu_kick(struct kvm_vcpu *vcpu) 592 { 593 int me; 594 int cpu = vcpu->cpu; 595 596 me = get_cpu(); 597 if (waitqueue_active(vcpu->arch.wqp)) { 598 wake_up_interruptible(vcpu->arch.wqp); 599 vcpu->stat.halt_wakeup++; 600 } else if (cpu != me && cpu != -1) { 601 smp_send_reschedule(vcpu->cpu); 602 } 603 put_cpu(); 604 } 605 606 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) 607 { 608 if (irq->irq == KVM_INTERRUPT_UNSET) { 609 kvmppc_core_dequeue_external(vcpu, irq); 610 return 0; 611 } 612 613 kvmppc_core_queue_external(vcpu, irq); 614 kvm_vcpu_kick(vcpu); 615 616 return 0; 617 } 618 619 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, 620 struct kvm_enable_cap *cap) 621 { 622 int r; 623 624 if (cap->flags) 625 return -EINVAL; 626 627 switch (cap->cap) { 628 case KVM_CAP_PPC_OSI: 629 r = 0; 630 vcpu->arch.osi_enabled = true; 631 break; 632 case KVM_CAP_PPC_PAPR: 633 r = 0; 634 vcpu->arch.papr_enabled = true; 635 break; 636 #ifdef CONFIG_KVM_E500 637 case KVM_CAP_SW_TLB: { 638 struct kvm_config_tlb cfg; 639 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0]; 640 641 r = -EFAULT; 642 if (copy_from_user(&cfg, user_ptr, sizeof(cfg))) 643 break; 644 645 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg); 646 break; 647 } 648 #endif 649 default: 650 r = -EINVAL; 651 break; 652 } 653 654 if (!r) 655 r = kvmppc_sanity_check(vcpu); 656 657 return r; 658 } 659 660 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 661 struct kvm_mp_state *mp_state) 662 { 663 return -EINVAL; 664 } 665 666 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 667 struct kvm_mp_state *mp_state) 668 { 669 return -EINVAL; 670 } 671 672 long kvm_arch_vcpu_ioctl(struct file *filp, 673 unsigned int ioctl, unsigned long arg) 674 { 675 struct kvm_vcpu *vcpu = filp->private_data; 676 void __user *argp = (void __user *)arg; 677 long r; 678 679 switch (ioctl) { 680 case KVM_INTERRUPT: { 681 struct kvm_interrupt irq; 682 r = -EFAULT; 683 if (copy_from_user(&irq, argp, sizeof(irq))) 684 goto out; 685 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); 686 goto out; 687 } 688 689 case KVM_ENABLE_CAP: 690 { 691 struct kvm_enable_cap cap; 692 r = -EFAULT; 693 if (copy_from_user(&cap, argp, sizeof(cap))) 694 goto out; 695 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); 696 break; 697 } 698 699 case KVM_SET_ONE_REG: 700 case KVM_GET_ONE_REG: 701 { 702 struct kvm_one_reg reg; 703 r = -EFAULT; 704 if (copy_from_user(®, argp, sizeof(reg))) 705 goto out; 706 if (ioctl == KVM_SET_ONE_REG) 707 r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®); 708 else 709 r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®); 710 break; 711 } 712 713 #ifdef CONFIG_KVM_E500 714 case KVM_DIRTY_TLB: { 715 struct kvm_dirty_tlb dirty; 716 r = -EFAULT; 717 if (copy_from_user(&dirty, argp, sizeof(dirty))) 718 goto out; 719 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty); 720 break; 721 } 722 #endif 723 724 default: 725 r = -EINVAL; 726 } 727 728 out: 729 return r; 730 } 731 732 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) 733 { 734 return VM_FAULT_SIGBUS; 735 } 736 737 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) 738 { 739 u32 inst_lis = 0x3c000000; 740 u32 inst_ori = 0x60000000; 741 u32 inst_nop = 0x60000000; 742 u32 inst_sc = 0x44000002; 743 u32 inst_imm_mask = 0xffff; 744 745 /* 746 * The hypercall to get into KVM from within guest context is as 747 * follows: 748 * 749 * lis r0, r0, KVM_SC_MAGIC_R0@h 750 * ori r0, KVM_SC_MAGIC_R0@l 751 * sc 752 * nop 753 */ 754 pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask); 755 pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask); 756 pvinfo->hcall[2] = inst_sc; 757 pvinfo->hcall[3] = inst_nop; 758 759 return 0; 760 } 761 762 long kvm_arch_vm_ioctl(struct file *filp, 763 unsigned int ioctl, unsigned long arg) 764 { 765 void __user *argp = (void __user *)arg; 766 long r; 767 768 switch (ioctl) { 769 case KVM_PPC_GET_PVINFO: { 770 struct kvm_ppc_pvinfo pvinfo; 771 memset(&pvinfo, 0, sizeof(pvinfo)); 772 r = kvm_vm_ioctl_get_pvinfo(&pvinfo); 773 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) { 774 r = -EFAULT; 775 goto out; 776 } 777 778 break; 779 } 780 #ifdef CONFIG_KVM_BOOK3S_64_HV 781 case KVM_CREATE_SPAPR_TCE: { 782 struct kvm_create_spapr_tce create_tce; 783 struct kvm *kvm = filp->private_data; 784 785 r = -EFAULT; 786 if (copy_from_user(&create_tce, argp, sizeof(create_tce))) 787 goto out; 788 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce); 789 goto out; 790 } 791 792 case KVM_ALLOCATE_RMA: { 793 struct kvm *kvm = filp->private_data; 794 struct kvm_allocate_rma rma; 795 796 r = kvm_vm_ioctl_allocate_rma(kvm, &rma); 797 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma))) 798 r = -EFAULT; 799 break; 800 } 801 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 802 803 default: 804 r = -ENOTTY; 805 } 806 807 out: 808 return r; 809 } 810 811 int kvm_arch_init(void *opaque) 812 { 813 return 0; 814 } 815 816 void kvm_arch_exit(void) 817 { 818 } 819