drivers/kvm/x86.c

   1 /*
   2  * Kernel-based Virtual Machine driver for Linux
   3  *
   4  * derived from drivers/kvm/kvm_main.c
   5  *
   6  * Copyright (C) 2006 Qumranet, Inc.
   7  *
   8  * Authors:
   9  *   Avi Kivity   <avi@qumranet.com>
  10  *   Yaniv Kamay  <yaniv@qumranet.com>
  11  *
  12  * This work is licensed under the terms of the GNU GPL, version 2.  See
  13  * the COPYING file in the top-level directory.
  14  *
  15  */
  16
  17 #include "kvm.h"
  18 #include "x86.h"
  19 #include "x86_emulate.h"
  20 #include "segment_descriptor.h"
  21 #include "irq.h"
  22
  23 #include <linux/kvm.h>
  24 #include <linux/fs.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/module.h>
  27
  28 #include <asm/uaccess.h>
  29 #include <asm/msr.h>
  30
  31 #define MAX_IO_MSRS 256
  32 #define CR0_RESERVED_BITS                                               \
  33         (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
  34                           | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
  35                           | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
  36 #define CR4_RESERVED_BITS                                               \
  37         (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
  38                           | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE     \
  39                           | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR  \
  40                           | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
  41
  42 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
  43 #define EFER_RESERVED_BITS 0xfffffffffffff2fe
  44
  45 #define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
  46
  47 struct kvm_x86_ops *kvm_x86_ops;
  48
  49 struct kvm_stats_debugfs_item debugfs_entries[] = {
  50         { "pf_fixed", STAT_OFFSET(pf_fixed) },
  51         { "pf_guest", STAT_OFFSET(pf_guest) },
  52         { "tlb_flush", STAT_OFFSET(tlb_flush) },
  53         { "invlpg", STAT_OFFSET(invlpg) },
  54         { "exits", STAT_OFFSET(exits) },
  55         { "io_exits", STAT_OFFSET(io_exits) },
  56         { "mmio_exits", STAT_OFFSET(mmio_exits) },
  57         { "signal_exits", STAT_OFFSET(signal_exits) },
  58         { "irq_window", STAT_OFFSET(irq_window_exits) },
  59         { "halt_exits", STAT_OFFSET(halt_exits) },
  60         { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
  61         { "request_irq", STAT_OFFSET(request_irq_exits) },
  62         { "irq_exits", STAT_OFFSET(irq_exits) },
  63         { "light_exits", STAT_OFFSET(light_exits) },
  64         { "efer_reload", STAT_OFFSET(efer_reload) },
  65         { NULL }
  66 };
  67
  68
  69 unsigned long segment_base(u16 selector)
  70 {
  71         struct descriptor_table gdt;
  72         struct segment_descriptor *d;
  73         unsigned long table_base;
  74         unsigned long v;
  75
  76         if (selector == 0)
  77                 return 0;
  78
  79         asm("sgdt %0" : "=m"(gdt));
  80         table_base = gdt.base;
  81
  82         if (selector & 4) {           /* from ldt */
  83                 u16 ldt_selector;
  84
  85                 asm("sldt %0" : "=g"(ldt_selector));
  86                 table_base = segment_base(ldt_selector);
  87         }
  88         d = (struct segment_descriptor *)(table_base + (selector & ~7));
  89         v = d->base_low | ((unsigned long)d->base_mid << 16) |
  90                 ((unsigned long)d->base_high << 24);
  91 #ifdef CONFIG_X86_64
  92         if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
  93                 v |= ((unsigned long) \
  94                       ((struct segment_descriptor_64 *)d)->base_higher) << 32;
  95 #endif
  96         return v;
  97 }
  98 EXPORT_SYMBOL_GPL(segment_base);
  99
 100 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
 101 {
 102         if (irqchip_in_kernel(vcpu->kvm))
 103                 return vcpu->apic_base;
 104         else
 105                 return vcpu->apic_base;
 106 }
 107 EXPORT_SYMBOL_GPL(kvm_get_apic_base);
 108
 109 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
 110 {
 111         /* TODO: reserve bits check */
 112         if (irqchip_in_kernel(vcpu->kvm))
 113                 kvm_lapic_set_base(vcpu, data);
 114         else
 115                 vcpu->apic_base = data;
 116 }
 117 EXPORT_SYMBOL_GPL(kvm_set_apic_base);
 118
 119 static void inject_gp(struct kvm_vcpu *vcpu)
 120 {
 121         kvm_x86_ops->inject_gp(vcpu, 0);
 122 }
 123
 124 /*
 125  * Load the pae pdptrs.  Return true is they are all valid.
 126  */
 127 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
 128 {
 129         gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
 130         unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
 131         int i;
 132         int ret;
 133         u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
 134
 135         mutex_lock(&vcpu->kvm->lock);
 136         ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
 137                                   offset * sizeof(u64), sizeof(pdpte));
 138         if (ret < 0) {
 139                 ret = 0;
 140                 goto out;
 141         }
 142         for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
 143                 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
 144                         ret = 0;
 145                         goto out;
 146                 }
 147         }
 148         ret = 1;
 149
 150         memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
 151 out:
 152         mutex_unlock(&vcpu->kvm->lock);
 153
 154         return ret;
 155 }
 156
 157 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 158 {
 159         if (cr0 & CR0_RESERVED_BITS) {
 160                 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
 161                        cr0, vcpu->cr0);
 162                 inject_gp(vcpu);
 163                 return;
 164         }
 165
 166         if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
 167                 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
 168                 inject_gp(vcpu);
 169                 return;
 170         }
 171
 172         if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
 173                 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
 174                        "and a clear PE flag\n");
 175                 inject_gp(vcpu);
 176                 return;
 177         }
 178
 179         if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
 180 #ifdef CONFIG_X86_64
 181                 if ((vcpu->shadow_efer & EFER_LME)) {
 182                         int cs_db, cs_l;
 183
 184                         if (!is_pae(vcpu)) {
 185                                 printk(KERN_DEBUG "set_cr0: #GP, start paging "
 186                                        "in long mode while PAE is disabled\n");
 187                                 inject_gp(vcpu);
 188                                 return;
 189                         }
 190                         kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
 191                         if (cs_l) {
 192                                 printk(KERN_DEBUG "set_cr0: #GP, start paging "
 193                                        "in long mode while CS.L == 1\n");
 194                                 inject_gp(vcpu);
 195                                 return;
 196
 197                         }
 198                 } else
 199 #endif
 200                 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
 201                         printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
 202                                "reserved bits\n");
 203                         inject_gp(vcpu);
 204                         return;
 205                 }
 206
 207         }
 208
 209         kvm_x86_ops->set_cr0(vcpu, cr0);
 210         vcpu->cr0 = cr0;
 211
 212         mutex_lock(&vcpu->kvm->lock);
 213         kvm_mmu_reset_context(vcpu);
 214         mutex_unlock(&vcpu->kvm->lock);
 215         return;
 216 }
 217 EXPORT_SYMBOL_GPL(set_cr0);
 218
 219 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
 220 {
 221         set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
 222 }
 223 EXPORT_SYMBOL_GPL(lmsw);
 224
 225 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 226 {
 227         if (cr4 & CR4_RESERVED_BITS) {
 228                 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
 229                 inject_gp(vcpu);
 230                 return;
 231         }
 232
 233         if (is_long_mode(vcpu)) {
 234                 if (!(cr4 & X86_CR4_PAE)) {
 235                         printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
 236                                "in long mode\n");
 237                         inject_gp(vcpu);
 238                         return;
 239                 }
 240         } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
 241                    && !load_pdptrs(vcpu, vcpu->cr3)) {
 242                 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
 243                 inject_gp(vcpu);
 244                 return;
 245         }
 246
 247         if (cr4 & X86_CR4_VMXE) {
 248                 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
 249                 inject_gp(vcpu);
 250                 return;
 251         }
 252         kvm_x86_ops->set_cr4(vcpu, cr4);
 253         vcpu->cr4 = cr4;
 254         mutex_lock(&vcpu->kvm->lock);
 255         kvm_mmu_reset_context(vcpu);
 256         mutex_unlock(&vcpu->kvm->lock);
 257 }
 258 EXPORT_SYMBOL_GPL(set_cr4);
 259
 260 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
 261 {
 262         if (is_long_mode(vcpu)) {
 263                 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
 264                         printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
 265                         inject_gp(vcpu);
 266                         return;
 267                 }
 268         } else {
 269                 if (is_pae(vcpu)) {
 270                         if (cr3 & CR3_PAE_RESERVED_BITS) {
 271                                 printk(KERN_DEBUG
 272                                        "set_cr3: #GP, reserved bits\n");
 273                                 inject_gp(vcpu);
 274                                 return;
 275                         }
 276                         if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
 277                                 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
 278                                        "reserved bits\n");
 279                                 inject_gp(vcpu);
 280                                 return;
 281                         }
 282                 }
 283                 /*
 284                  * We don't check reserved bits in nonpae mode, because
 285                  * this isn't enforced, and VMware depends on this.
 286                  */
 287         }
 288
 289         mutex_lock(&vcpu->kvm->lock);
 290         /*
 291          * Does the new cr3 value map to physical memory? (Note, we
 292          * catch an invalid cr3 even in real-mode, because it would
 293          * cause trouble later on when we turn on paging anyway.)
 294          *
 295          * A real CPU would silently accept an invalid cr3 and would
 296          * attempt to use it - with largely undefined (and often hard
 297          * to debug) behavior on the guest side.
 298          */
 299         if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
 300                 inject_gp(vcpu);
 301         else {
 302                 vcpu->cr3 = cr3;
 303                 vcpu->mmu.new_cr3(vcpu);
 304         }
 305         mutex_unlock(&vcpu->kvm->lock);
 306 }
 307 EXPORT_SYMBOL_GPL(set_cr3);
 308
 309 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
 310 {
 311         if (cr8 & CR8_RESERVED_BITS) {
 312                 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
 313                 inject_gp(vcpu);
 314                 return;
 315         }
 316         if (irqchip_in_kernel(vcpu->kvm))
 317                 kvm_lapic_set_tpr(vcpu, cr8);
 318         else
 319                 vcpu->cr8 = cr8;
 320 }
 321 EXPORT_SYMBOL_GPL(set_cr8);
 322
 323 unsigned long get_cr8(struct kvm_vcpu *vcpu)
 324 {
 325         if (irqchip_in_kernel(vcpu->kvm))
 326                 return kvm_lapic_get_cr8(vcpu);
 327         else
 328                 return vcpu->cr8;
 329 }
 330 EXPORT_SYMBOL_GPL(get_cr8);
 331
 332 /*
 333  * List of msr numbers which we expose to userspace through KVM_GET_MSRS
 334  * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
 335  *
 336  * This list is modified at module load time to reflect the
 337  * capabilities of the host cpu.
 338  */
 339 static u32 msrs_to_save[] = {
 340         MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
 341         MSR_K6_STAR,
 342 #ifdef CONFIG_X86_64
 343         MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
 344 #endif
 345         MSR_IA32_TIME_STAMP_COUNTER,
 346 };
 347
 348 static unsigned num_msrs_to_save;
 349
 350 static u32 emulated_msrs[] = {
 351         MSR_IA32_MISC_ENABLE,
 352 };
 353
 354 #ifdef CONFIG_X86_64
 355
 356 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
 357 {
 358         if (efer & EFER_RESERVED_BITS) {
 359                 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
 360                        efer);
 361                 inject_gp(vcpu);
 362                 return;
 363         }
 364
 365         if (is_paging(vcpu)
 366             && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
 367                 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
 368                 inject_gp(vcpu);
 369                 return;
 370         }
 371
 372         kvm_x86_ops->set_efer(vcpu, efer);
 373
 374         efer &= ~EFER_LMA;
 375         efer |= vcpu->shadow_efer & EFER_LMA;
 376
 377         vcpu->shadow_efer = efer;
 378 }
 379
 380 #endif
 381
 382 /*
 383  * Writes msr value into into the appropriate "register".
 384  * Returns 0 on success, non-0 otherwise.
 385  * Assumes vcpu_load() was already called.
 386  */
 387 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
 388 {
 389         return kvm_x86_ops->set_msr(vcpu, msr_index, data);
 390 }
 391
 392 /*
 393  * Adapt set_msr() to msr_io()'s calling convention
 394  */
 395 static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
 396 {
 397         return kvm_set_msr(vcpu, index, *data);
 398 }
 399
 400
 401 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
 402 {
 403         switch (msr) {
 404 #ifdef CONFIG_X86_64
 405         case MSR_EFER:
 406                 set_efer(vcpu, data);
 407                 break;
 408 #endif
 409         case MSR_IA32_MC0_STATUS:
 410                 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
 411                        __FUNCTION__, data);
 412                 break;
 413         case MSR_IA32_MCG_STATUS:
 414                 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
 415                         __FUNCTION__, data);
 416                 break;
 417         case MSR_IA32_UCODE_REV:
 418         case MSR_IA32_UCODE_WRITE:
 419         case 0x200 ... 0x2ff: /* MTRRs */
 420                 break;
 421         case MSR_IA32_APICBASE:
 422                 kvm_set_apic_base(vcpu, data);
 423                 break;
 424         case MSR_IA32_MISC_ENABLE:
 425                 vcpu->ia32_misc_enable_msr = data;
 426                 break;
 427         default:
 428                 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
 429                 return 1;
 430         }
 431         return 0;
 432 }
 433 EXPORT_SYMBOL_GPL(kvm_set_msr_common);
 434
 435
 436 /*
 437  * Reads an msr value (of 'msr_index') into 'pdata'.
 438  * Returns 0 on success, non-0 otherwise.
 439  * Assumes vcpu_load() was already called.
 440  */
 441 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
 442 {
 443         return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
 444 }
 445
 446 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
 447 {
 448         u64 data;
 449
 450         switch (msr) {
 451         case 0xc0010010: /* SYSCFG */
 452         case 0xc0010015: /* HWCR */
 453         case MSR_IA32_PLATFORM_ID:
 454         case MSR_IA32_P5_MC_ADDR:
 455         case MSR_IA32_P5_MC_TYPE:
 456         case MSR_IA32_MC0_CTL:
 457         case MSR_IA32_MCG_STATUS:
 458         case MSR_IA32_MCG_CAP:
 459         case MSR_IA32_MC0_MISC:
 460         case MSR_IA32_MC0_MISC+4:
 461         case MSR_IA32_MC0_MISC+8:
 462         case MSR_IA32_MC0_MISC+12:
 463         case MSR_IA32_MC0_MISC+16:
 464         case MSR_IA32_UCODE_REV:
 465         case MSR_IA32_PERF_STATUS:
 466         case MSR_IA32_EBL_CR_POWERON:
 467                 /* MTRR registers */
 468         case 0xfe:
 469         case 0x200 ... 0x2ff:
 470                 data = 0;
 471                 break;
 472         case 0xcd: /* fsb frequency */
 473                 data = 3;
 474                 break;
 475         case MSR_IA32_APICBASE:
 476                 data = kvm_get_apic_base(vcpu);
 477                 break;
 478         case MSR_IA32_MISC_ENABLE:
 479                 data = vcpu->ia32_misc_enable_msr;
 480                 break;
 481 #ifdef CONFIG_X86_64
 482         case MSR_EFER:
 483                 data = vcpu->shadow_efer;
 484                 break;
 485 #endif
 486         default:
 487                 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
 488                 return 1;
 489         }
 490         *pdata = data;
 491         return 0;
 492 }
 493 EXPORT_SYMBOL_GPL(kvm_get_msr_common);
 494
 495 /*
 496  * Read or write a bunch of msrs. All parameters are kernel addresses.
 497  *
 498  * @return number of msrs set successfully.
 499  */
 500 static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
 501                     struct kvm_msr_entry *entries,
 502                     int (*do_msr)(struct kvm_vcpu *vcpu,
 503                                   unsigned index, u64 *data))
 504 {
 505         int i;
 506
 507         vcpu_load(vcpu);
 508
 509         for (i = 0; i < msrs->nmsrs; ++i)
 510                 if (do_msr(vcpu, entries[i].index, &entries[i].data))
 511                         break;
 512
 513         vcpu_put(vcpu);
 514
 515         return i;
 516 }
 517
 518 /*
 519  * Read or write a bunch of msrs. Parameters are user addresses.
 520  *
 521  * @return number of msrs set successfully.
 522  */
 523 static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
 524                   int (*do_msr)(struct kvm_vcpu *vcpu,
 525                                 unsigned index, u64 *data),
 526                   int writeback)
 527 {
 528         struct kvm_msrs msrs;
 529         struct kvm_msr_entry *entries;
 530         int r, n;
 531         unsigned size;
 532
 533         r = -EFAULT;
 534         if (copy_from_user(&msrs, user_msrs, sizeof msrs))
 535                 goto out;
 536
 537         r = -E2BIG;
 538         if (msrs.nmsrs >= MAX_IO_MSRS)
 539                 goto out;
 540
 541         r = -ENOMEM;
 542         size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
 543         entries = vmalloc(size);
 544         if (!entries)
 545                 goto out;
 546
 547         r = -EFAULT;
 548         if (copy_from_user(entries, user_msrs->entries, size))
 549                 goto out_free;
 550
 551         r = n = __msr_io(vcpu, &msrs, entries, do_msr);
 552         if (r < 0)
 553                 goto out_free;
 554
 555         r = -EFAULT;
 556         if (writeback && copy_to_user(user_msrs->entries, entries, size))
 557                 goto out_free;
 558
 559         r = n;
 560
 561 out_free:
 562         vfree(entries);
 563 out:
 564         return r;
 565 }
 566
 567 /*
 568  * Make sure that a cpu that is being hot-unplugged does not have any vcpus
 569  * cached on it.
 570  */
 571 void decache_vcpus_on_cpu(int cpu)
 572 {
 573         struct kvm *vm;
 574         struct kvm_vcpu *vcpu;
 575         int i;
 576
 577         spin_lock(&kvm_lock);
 578         list_for_each_entry(vm, &vm_list, vm_list)
 579                 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
 580                         vcpu = vm->vcpus[i];
 581                         if (!vcpu)
 582                                 continue;
 583                         /*
 584                          * If the vcpu is locked, then it is running on some
 585                          * other cpu and therefore it is not cached on the
 586                          * cpu in question.
 587                          *
 588                          * If it's not locked, check the last cpu it executed
 589                          * on.
 590                          */
 591                         if (mutex_trylock(&vcpu->mutex)) {
 592                                 if (vcpu->cpu == cpu) {
 593                                         kvm_x86_ops->vcpu_decache(vcpu);
 594                                         vcpu->cpu = -1;
 595                                 }
 596                                 mutex_unlock(&vcpu->mutex);
 597                         }
 598                 }
 599         spin_unlock(&kvm_lock);
 600 }
 601
 602 int kvm_dev_ioctl_check_extension(long ext)
 603 {
 604         int r;
 605
 606         switch (ext) {
 607         case KVM_CAP_IRQCHIP:
 608         case KVM_CAP_HLT:
 609         case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
 610         case KVM_CAP_USER_MEMORY:
 611         case KVM_CAP_SET_TSS_ADDR:
 612                 r = 1;
 613                 break;
 614         default:
 615                 r = 0;
 616                 break;
 617         }
 618         return r;
 619
 620 }
 621
 622 long kvm_arch_dev_ioctl(struct file *filp,
 623                         unsigned int ioctl, unsigned long arg)
 624 {
 625         void __user *argp = (void __user *)arg;
 626         long r;
 627
 628         switch (ioctl) {
 629         case KVM_GET_MSR_INDEX_LIST: {
 630                 struct kvm_msr_list __user *user_msr_list = argp;
 631                 struct kvm_msr_list msr_list;
 632                 unsigned n;
 633
 634                 r = -EFAULT;
 635                 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
 636                         goto out;
 637                 n = msr_list.nmsrs;
 638                 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
 639                 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
 640                         goto out;
 641                 r = -E2BIG;
 642                 if (n < num_msrs_to_save)
 643                         goto out;
 644                 r = -EFAULT;
 645                 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
 646                                  num_msrs_to_save * sizeof(u32)))
 647                         goto out;
 648                 if (copy_to_user(user_msr_list->indices
 649                                  + num_msrs_to_save * sizeof(u32),
 650                                  &emulated_msrs,
 651                                  ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
 652                         goto out;
 653                 r = 0;
 654                 break;
 655         }
 656         default:
 657                 r = -EINVAL;
 658         }
 659 out:
 660         return r;
 661 }
 662
 663 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 664 {
 665         kvm_x86_ops->vcpu_load(vcpu, cpu);
 666 }
 667
 668 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 669 {
 670         kvm_x86_ops->vcpu_put(vcpu);
 671 }
 672
 673 static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
 674 {
 675         u64 efer;
 676         int i;
 677         struct kvm_cpuid_entry *e, *entry;
 678
 679         rdmsrl(MSR_EFER, efer);
 680         entry = NULL;
 681         for (i = 0; i < vcpu->cpuid_nent; ++i) {
 682                 e = &vcpu->cpuid_entries[i];
 683                 if (e->function == 0x80000001) {
 684                         entry = e;
 685                         break;
 686                 }
 687         }
 688         if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
 689                 entry->edx &= ~(1 << 20);
 690                 printk(KERN_INFO "kvm: guest NX capability removed\n");
 691         }
 692 }
 693
 694 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
 695                                     struct kvm_cpuid *cpuid,
 696                                     struct kvm_cpuid_entry __user *entries)
 697 {
 698         int r;
 699
 700         r = -E2BIG;
 701         if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
 702                 goto out;
 703         r = -EFAULT;
 704         if (copy_from_user(&vcpu->cpuid_entries, entries,
 705                            cpuid->nent * sizeof(struct kvm_cpuid_entry)))
 706                 goto out;
 707         vcpu->cpuid_nent = cpuid->nent;
 708         cpuid_fix_nx_cap(vcpu);
 709         return 0;
 710
 711 out:
 712         return r;
 713 }
 714
 715 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
 716                                     struct kvm_lapic_state *s)
 717 {
 718         vcpu_load(vcpu);
 719         memcpy(s->regs, vcpu->apic->regs, sizeof *s);
 720         vcpu_put(vcpu);
 721
 722         return 0;
 723 }
 724
 725 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
 726                                     struct kvm_lapic_state *s)
 727 {
 728         vcpu_load(vcpu);
 729         memcpy(vcpu->apic->regs, s->regs, sizeof *s);
 730         kvm_apic_post_state_restore(vcpu);
 731         vcpu_put(vcpu);
 732
 733         return 0;
 734 }
 735
 736 long kvm_arch_vcpu_ioctl(struct file *filp,
 737                          unsigned int ioctl, unsigned long arg)
 738 {
 739         struct kvm_vcpu *vcpu = filp->private_data;
 740         void __user *argp = (void __user *)arg;
 741         int r;
 742
 743         switch (ioctl) {
 744         case KVM_GET_LAPIC: {
 745                 struct kvm_lapic_state lapic;
 746
 747                 memset(&lapic, 0, sizeof lapic);
 748                 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
 749                 if (r)
 750                         goto out;
 751                 r = -EFAULT;
 752                 if (copy_to_user(argp, &lapic, sizeof lapic))
 753                         goto out;
 754                 r = 0;
 755                 break;
 756         }
 757         case KVM_SET_LAPIC: {
 758                 struct kvm_lapic_state lapic;
 759
 760                 r = -EFAULT;
 761                 if (copy_from_user(&lapic, argp, sizeof lapic))
 762                         goto out;
 763                 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
 764                 if (r)
 765                         goto out;
 766                 r = 0;
 767                 break;
 768         }
 769         case KVM_SET_CPUID: {
 770                 struct kvm_cpuid __user *cpuid_arg = argp;
 771                 struct kvm_cpuid cpuid;
 772
 773                 r = -EFAULT;
 774                 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
 775                         goto out;
 776                 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
 777                 if (r)
 778                         goto out;
 779                 break;
 780         }
 781         case KVM_GET_MSRS:
 782                 r = msr_io(vcpu, argp, kvm_get_msr, 1);
 783                 break;
 784         case KVM_SET_MSRS:
 785                 r = msr_io(vcpu, argp, do_set_msr, 0);
 786                 break;
 787         default:
 788                 r = -EINVAL;
 789         }
 790 out:
 791         return r;
 792 }
 793
 794 static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
 795 {
 796         int ret;
 797
 798         if (addr > (unsigned int)(-3 * PAGE_SIZE))
 799                 return -1;
 800         ret = kvm_x86_ops->set_tss_addr(kvm, addr);
 801         return ret;
 802 }
 803
 804 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
 805                                           u32 kvm_nr_mmu_pages)
 806 {
 807         if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
 808                 return -EINVAL;
 809
 810         mutex_lock(&kvm->lock);
 811
 812         kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
 813         kvm->n_requested_mmu_pages = kvm_nr_mmu_pages;
 814
 815         mutex_unlock(&kvm->lock);
 816         return 0;
 817 }
 818
 819 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
 820 {
 821         return kvm->n_alloc_mmu_pages;
 822 }
 823
 824 /*
 825  * Set a new alias region.  Aliases map a portion of physical memory into
 826  * another portion.  This is useful for memory windows, for example the PC
 827  * VGA region.
 828  */
 829 static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
 830                                          struct kvm_memory_alias *alias)
 831 {
 832         int r, n;
 833         struct kvm_mem_alias *p;
 834
 835         r = -EINVAL;
 836         /* General sanity checks */
 837         if (alias->memory_size & (PAGE_SIZE - 1))
 838                 goto out;
 839         if (alias->guest_phys_addr & (PAGE_SIZE - 1))
 840                 goto out;
 841         if (alias->slot >= KVM_ALIAS_SLOTS)
 842                 goto out;
 843         if (alias->guest_phys_addr + alias->memory_size
 844             < alias->guest_phys_addr)
 845                 goto out;
 846         if (alias->target_phys_addr + alias->memory_size
 847             < alias->target_phys_addr)
 848                 goto out;
 849
 850         mutex_lock(&kvm->lock);
 851
 852         p = &kvm->aliases[alias->slot];
 853         p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
 854         p->npages = alias->memory_size >> PAGE_SHIFT;
 855         p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
 856
 857         for (n = KVM_ALIAS_SLOTS; n > 0; --n)
 858                 if (kvm->aliases[n - 1].npages)
 859                         break;
 860         kvm->naliases = n;
 861
 862         kvm_mmu_zap_all(kvm);
 863
 864         mutex_unlock(&kvm->lock);
 865
 866         return 0;
 867
 868 out:
 869         return r;
 870 }
 871
 872 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
 873 {
 874         int r;
 875
 876         r = 0;
 877         switch (chip->chip_id) {
 878         case KVM_IRQCHIP_PIC_MASTER:
 879                 memcpy(&chip->chip.pic,
 880                         &pic_irqchip(kvm)->pics[0],
 881                         sizeof(struct kvm_pic_state));
 882                 break;
 883         case KVM_IRQCHIP_PIC_SLAVE:
 884                 memcpy(&chip->chip.pic,
 885                         &pic_irqchip(kvm)->pics[1],
 886                         sizeof(struct kvm_pic_state));
 887                 break;
 888         case KVM_IRQCHIP_IOAPIC:
 889                 memcpy(&chip->chip.ioapic,
 890                         ioapic_irqchip(kvm),
 891                         sizeof(struct kvm_ioapic_state));
 892                 break;
 893         default:
 894                 r = -EINVAL;
 895                 break;
 896         }
 897         return r;
 898 }
 899
 900 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
 901 {
 902         int r;
 903
 904         r = 0;
 905         switch (chip->chip_id) {
 906         case KVM_IRQCHIP_PIC_MASTER:
 907                 memcpy(&pic_irqchip(kvm)->pics[0],
 908                         &chip->chip.pic,
 909                         sizeof(struct kvm_pic_state));
 910                 break;
 911         case KVM_IRQCHIP_PIC_SLAVE:
 912                 memcpy(&pic_irqchip(kvm)->pics[1],
 913                         &chip->chip.pic,
 914                         sizeof(struct kvm_pic_state));
 915                 break;
 916         case KVM_IRQCHIP_IOAPIC:
 917                 memcpy(ioapic_irqchip(kvm),
 918                         &chip->chip.ioapic,
 919                         sizeof(struct kvm_ioapic_state));
 920                 break;
 921         default:
 922                 r = -EINVAL;
 923                 break;
 924         }
 925         kvm_pic_update_irq(pic_irqchip(kvm));
 926         return r;
 927 }
 928
 929 long kvm_arch_vm_ioctl(struct file *filp,
 930                        unsigned int ioctl, unsigned long arg)
 931 {
 932         struct kvm *kvm = filp->private_data;
 933         void __user *argp = (void __user *)arg;
 934         int r = -EINVAL;
 935
 936         switch (ioctl) {
 937         case KVM_SET_TSS_ADDR:
 938                 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
 939                 if (r < 0)
 940                         goto out;
 941                 break;
 942         case KVM_SET_MEMORY_REGION: {
 943                 struct kvm_memory_region kvm_mem;
 944                 struct kvm_userspace_memory_region kvm_userspace_mem;
 945
 946                 r = -EFAULT;
 947                 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
 948                         goto out;
 949                 kvm_userspace_mem.slot = kvm_mem.slot;
 950                 kvm_userspace_mem.flags = kvm_mem.flags;
 951                 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
 952                 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
 953                 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
 954                 if (r)
 955                         goto out;
 956                 break;
 957         }
 958         case KVM_SET_NR_MMU_PAGES:
 959                 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
 960                 if (r)
 961                         goto out;
 962                 break;
 963         case KVM_GET_NR_MMU_PAGES:
 964                 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
 965                 break;
 966         case KVM_SET_MEMORY_ALIAS: {
 967                 struct kvm_memory_alias alias;
 968
 969                 r = -EFAULT;
 970                 if (copy_from_user(&alias, argp, sizeof alias))
 971                         goto out;
 972                 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
 973                 if (r)
 974                         goto out;
 975                 break;
 976         }
 977         case KVM_CREATE_IRQCHIP:
 978                 r = -ENOMEM;
 979                 kvm->vpic = kvm_create_pic(kvm);
 980                 if (kvm->vpic) {
 981                         r = kvm_ioapic_init(kvm);
 982                         if (r) {
 983                                 kfree(kvm->vpic);
 984                                 kvm->vpic = NULL;
 985                                 goto out;
 986                         }
 987                 } else
 988                         goto out;
 989                 break;
 990         case KVM_IRQ_LINE: {
 991                 struct kvm_irq_level irq_event;
 992
 993                 r = -EFAULT;
 994                 if (copy_from_user(&irq_event, argp, sizeof irq_event))
 995                         goto out;
 996                 if (irqchip_in_kernel(kvm)) {
 997                         mutex_lock(&kvm->lock);
 998                         if (irq_event.irq < 16)
 999                                 kvm_pic_set_irq(pic_irqchip(kvm),
1000                                         irq_event.irq,
1001                                         irq_event.level);
1002                         kvm_ioapic_set_irq(kvm->vioapic,
1003                                         irq_event.irq,
1004                                         irq_event.level);
1005                         mutex_unlock(&kvm->lock);
1006                         r = 0;
1007                 }
1008                 break;
1009         }
1010         case KVM_GET_IRQCHIP: {
1011                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1012                 struct kvm_irqchip chip;
1013
1014                 r = -EFAULT;
1015                 if (copy_from_user(&chip, argp, sizeof chip))
1016                         goto out;
1017                 r = -ENXIO;
1018                 if (!irqchip_in_kernel(kvm))
1019                         goto out;
1020                 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1021                 if (r)
1022                         goto out;
1023                 r = -EFAULT;
1024                 if (copy_to_user(argp, &chip, sizeof chip))
1025                         goto out;
1026                 r = 0;
1027                 break;
1028         }
1029         case KVM_SET_IRQCHIP: {
1030                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1031                 struct kvm_irqchip chip;
1032
1033                 r = -EFAULT;
1034                 if (copy_from_user(&chip, argp, sizeof chip))
1035                         goto out;
1036                 r = -ENXIO;
1037                 if (!irqchip_in_kernel(kvm))
1038                         goto out;
1039                 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1040                 if (r)
1041                         goto out;
1042                 r = 0;
1043                 break;
1044         }
1045         default:
1046                 ;
1047         }
1048 out:
1049         return r;
1050 }
1051
1052 static void kvm_init_msr_list(void)
1053 {
1054         u32 dummy[2];
1055         unsigned i, j;
1056
1057         for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
1058                 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
1059                         continue;
1060                 if (j < i)
1061                         msrs_to_save[j] = msrs_to_save[i];
1062                 j++;
1063         }
1064         num_msrs_to_save = j;
1065 }
1066
1067 /*
1068  * Only apic need an MMIO device hook, so shortcut now..
1069  */
1070 static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1071                                                 gpa_t addr)
1072 {
1073         struct kvm_io_device *dev;
1074
1075         if (vcpu->apic) {
1076                 dev = &vcpu->apic->dev;
1077                 if (dev->in_range(dev, addr))
1078                         return dev;
1079         }
1080         return NULL;
1081 }
1082
1083
1084 static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1085                                                 gpa_t addr)
1086 {
1087         struct kvm_io_device *dev;
1088
1089         dev = vcpu_find_pervcpu_dev(vcpu, addr);
1090         if (dev == NULL)
1091                 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1092         return dev;
1093 }
1094
1095 int emulator_read_std(unsigned long addr,
1096                              void *val,
1097                              unsigned int bytes,
1098                              struct kvm_vcpu *vcpu)
1099 {
1100         void *data = val;
1101
1102         while (bytes) {
1103                 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1104                 unsigned offset = addr & (PAGE_SIZE-1);
1105                 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
1106                 int ret;
1107
1108                 if (gpa == UNMAPPED_GVA)
1109                         return X86EMUL_PROPAGATE_FAULT;
1110                 ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
1111                 if (ret < 0)
1112                         return X86EMUL_UNHANDLEABLE;
1113
1114                 bytes -= tocopy;
1115                 data += tocopy;
1116                 addr += tocopy;
1117         }
1118
1119         return X86EMUL_CONTINUE;
1120 }
1121 EXPORT_SYMBOL_GPL(emulator_read_std);
1122
1123 static int emulator_write_std(unsigned long addr,
1124                               const void *val,
1125                               unsigned int bytes,
1126                               struct kvm_vcpu *vcpu)
1127 {
1128         pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
1129         return X86EMUL_UNHANDLEABLE;
1130 }
1131
1132 static int emulator_read_emulated(unsigned long addr,
1133                                   void *val,
1134                                   unsigned int bytes,
1135                                   struct kvm_vcpu *vcpu)
1136 {
1137         struct kvm_io_device *mmio_dev;
1138         gpa_t                 gpa;
1139
1140         if (vcpu->mmio_read_completed) {
1141                 memcpy(val, vcpu->mmio_data, bytes);
1142                 vcpu->mmio_read_completed = 0;
1143                 return X86EMUL_CONTINUE;
1144         }
1145
1146         gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1147
1148         /* For APIC access vmexit */
1149         if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1150                 goto mmio;
1151
1152         if (emulator_read_std(addr, val, bytes, vcpu)
1153                         == X86EMUL_CONTINUE)
1154                 return X86EMUL_CONTINUE;
1155         if (gpa == UNMAPPED_GVA)
1156                 return X86EMUL_PROPAGATE_FAULT;
1157
1158 mmio:
1159         /*
1160          * Is this MMIO handled locally?
1161          */
1162         mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1163         if (mmio_dev) {
1164                 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1165                 return X86EMUL_CONTINUE;
1166         }
1167
1168         vcpu->mmio_needed = 1;
1169         vcpu->mmio_phys_addr = gpa;
1170         vcpu->mmio_size = bytes;
1171         vcpu->mmio_is_write = 0;
1172
1173         return X86EMUL_UNHANDLEABLE;
1174 }
1175
1176 static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
1177                                const void *val, int bytes)
1178 {
1179         int ret;
1180
1181         ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
1182         if (ret < 0)
1183                 return 0;
1184         kvm_mmu_pte_write(vcpu, gpa, val, bytes);
1185         return 1;
1186 }
1187
1188 static int emulator_write_emulated_onepage(unsigned long addr,
1189                                            const void *val,
1190                                            unsigned int bytes,
1191                                            struct kvm_vcpu *vcpu)
1192 {
1193         struct kvm_io_device *mmio_dev;
1194         gpa_t                 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1195
1196         if (gpa == UNMAPPED_GVA) {
1197                 kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
1198                 return X86EMUL_PROPAGATE_FAULT;
1199         }
1200
1201         /* For APIC access vmexit */
1202         if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1203                 goto mmio;
1204
1205         if (emulator_write_phys(vcpu, gpa, val, bytes))
1206                 return X86EMUL_CONTINUE;
1207
1208 mmio:
1209         /*
1210          * Is this MMIO handled locally?
1211          */
1212         mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1213         if (mmio_dev) {
1214                 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1215                 return X86EMUL_CONTINUE;
1216         }
1217
1218         vcpu->mmio_needed = 1;
1219         vcpu->mmio_phys_addr = gpa;
1220         vcpu->mmio_size = bytes;
1221         vcpu->mmio_is_write = 1;
1222         memcpy(vcpu->mmio_data, val, bytes);
1223
1224         return X86EMUL_CONTINUE;
1225 }
1226
1227 int emulator_write_emulated(unsigned long addr,
1228                                    const void *val,
1229                                    unsigned int bytes,
1230                                    struct kvm_vcpu *vcpu)
1231 {
1232         /* Crossing a page boundary? */
1233         if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1234                 int rc, now;
1235
1236                 now = -addr & ~PAGE_MASK;
1237                 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
1238                 if (rc != X86EMUL_CONTINUE)
1239                         return rc;
1240                 addr += now;
1241                 val += now;
1242                 bytes -= now;
1243         }
1244         return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
1245 }
1246 EXPORT_SYMBOL_GPL(emulator_write_emulated);
1247
1248 static int emulator_cmpxchg_emulated(unsigned long addr,
1249                                      const void *old,
1250                                      const void *new,
1251                                      unsigned int bytes,
1252                                      struct kvm_vcpu *vcpu)
1253 {
1254         static int reported;
1255
1256         if (!reported) {
1257                 reported = 1;
1258                 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1259         }
1260         return emulator_write_emulated(addr, new, bytes, vcpu);
1261 }
1262
1263 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1264 {
1265         return kvm_x86_ops->get_segment_base(vcpu, seg);
1266 }
1267
1268 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1269 {
1270         return X86EMUL_CONTINUE;
1271 }
1272
1273 int emulate_clts(struct kvm_vcpu *vcpu)
1274 {
1275         kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
1276         return X86EMUL_CONTINUE;
1277 }
1278
1279 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
1280 {
1281         struct kvm_vcpu *vcpu = ctxt->vcpu;
1282
1283         switch (dr) {
1284         case 0 ... 3:
1285                 *dest = kvm_x86_ops->get_dr(vcpu, dr);
1286                 return X86EMUL_CONTINUE;
1287         default:
1288                 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
1289                 return X86EMUL_UNHANDLEABLE;
1290         }
1291 }
1292
1293 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1294 {
1295         unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1296         int exception;
1297
1298         kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
1299         if (exception) {
1300                 /* FIXME: better handling */
1301                 return X86EMUL_UNHANDLEABLE;
1302         }
1303         return X86EMUL_CONTINUE;
1304 }
1305
1306 void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
1307 {
1308         static int reported;
1309         u8 opcodes[4];
1310         unsigned long rip = vcpu->rip;
1311         unsigned long rip_linear;
1312
1313         rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
1314
1315         if (reported)
1316                 return;
1317
1318         emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
1319
1320         printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1321                context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
1322         reported = 1;
1323 }
1324 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
1325
1326 struct x86_emulate_ops emulate_ops = {
1327         .read_std            = emulator_read_std,
1328         .write_std           = emulator_write_std,
1329         .read_emulated       = emulator_read_emulated,
1330         .write_emulated      = emulator_write_emulated,
1331         .cmpxchg_emulated    = emulator_cmpxchg_emulated,
1332 };
1333
1334 int emulate_instruction(struct kvm_vcpu *vcpu,
1335                         struct kvm_run *run,
1336                         unsigned long cr2,
1337                         u16 error_code,
1338                         int no_decode)
1339 {
1340         int r;
1341
1342         vcpu->mmio_fault_cr2 = cr2;
1343         kvm_x86_ops->cache_regs(vcpu);
1344
1345         vcpu->mmio_is_write = 0;
1346         vcpu->pio.string = 0;
1347
1348         if (!no_decode) {
1349                 int cs_db, cs_l;
1350                 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1351
1352                 vcpu->emulate_ctxt.vcpu = vcpu;
1353                 vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1354                 vcpu->emulate_ctxt.cr2 = cr2;
1355                 vcpu->emulate_ctxt.mode =
1356                         (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
1357                         ? X86EMUL_MODE_REAL : cs_l
1358                         ? X86EMUL_MODE_PROT64 : cs_db
1359                         ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1360
1361                 if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1362                         vcpu->emulate_ctxt.cs_base = 0;
1363                         vcpu->emulate_ctxt.ds_base = 0;
1364                         vcpu->emulate_ctxt.es_base = 0;
1365                         vcpu->emulate_ctxt.ss_base = 0;
1366                 } else {
1367                         vcpu->emulate_ctxt.cs_base =
1368                                         get_segment_base(vcpu, VCPU_SREG_CS);
1369                         vcpu->emulate_ctxt.ds_base =
1370                                         get_segment_base(vcpu, VCPU_SREG_DS);
1371                         vcpu->emulate_ctxt.es_base =
1372                                         get_segment_base(vcpu, VCPU_SREG_ES);
1373                         vcpu->emulate_ctxt.ss_base =
1374                                         get_segment_base(vcpu, VCPU_SREG_SS);
1375                 }
1376
1377                 vcpu->emulate_ctxt.gs_base =
1378                                         get_segment_base(vcpu, VCPU_SREG_GS);
1379                 vcpu->emulate_ctxt.fs_base =
1380                                         get_segment_base(vcpu, VCPU_SREG_FS);
1381
1382                 r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
1383                 if (r)  {
1384                         if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1385                                 return EMULATE_DONE;
1386                         return EMULATE_FAIL;
1387                 }
1388         }
1389
1390         r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops);
1391
1392         if (vcpu->pio.string)
1393                 return EMULATE_DO_MMIO;
1394
1395         if ((r || vcpu->mmio_is_write) && run) {
1396                 run->exit_reason = KVM_EXIT_MMIO;
1397                 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1398                 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1399                 run->mmio.len = vcpu->mmio_size;
1400                 run->mmio.is_write = vcpu->mmio_is_write;
1401         }
1402
1403         if (r) {
1404                 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1405                         return EMULATE_DONE;
1406                 if (!vcpu->mmio_needed) {
1407                         kvm_report_emulation_failure(vcpu, "mmio");
1408                         return EMULATE_FAIL;
1409                 }
1410                 return EMULATE_DO_MMIO;
1411         }
1412
1413         kvm_x86_ops->decache_regs(vcpu);
1414         kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags);
1415
1416         if (vcpu->mmio_is_write) {
1417                 vcpu->mmio_needed = 0;
1418                 return EMULATE_DO_MMIO;
1419         }
1420
1421         return EMULATE_DONE;
1422 }
1423 EXPORT_SYMBOL_GPL(emulate_instruction);
1424
1425 static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
1426 {
1427         int i;
1428
1429         for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
1430                 if (vcpu->pio.guest_pages[i]) {
1431                         kvm_release_page(vcpu->pio.guest_pages[i]);
1432                         vcpu->pio.guest_pages[i] = NULL;
1433                 }
1434 }
1435
1436 static int pio_copy_data(struct kvm_vcpu *vcpu)
1437 {
1438         void *p = vcpu->pio_data;
1439         void *q;
1440         unsigned bytes;
1441         int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1442
1443         q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1444                  PAGE_KERNEL);
1445         if (!q) {
1446                 free_pio_guest_pages(vcpu);
1447                 return -ENOMEM;
1448         }
1449         q += vcpu->pio.guest_page_offset;
1450         bytes = vcpu->pio.size * vcpu->pio.cur_count;
1451         if (vcpu->pio.in)
1452                 memcpy(q, p, bytes);
1453         else
1454                 memcpy(p, q, bytes);
1455         q -= vcpu->pio.guest_page_offset;
1456         vunmap(q);
1457         free_pio_guest_pages(vcpu);
1458         return 0;
1459 }
1460
1461 int complete_pio(struct kvm_vcpu *vcpu)
1462 {
1463         struct kvm_pio_request *io = &vcpu->pio;
1464         long delta;
1465         int r;
1466
1467         kvm_x86_ops->cache_regs(vcpu);
1468
1469         if (!io->string) {
1470                 if (io->in)
1471                         memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
1472                                io->size);
1473         } else {
1474                 if (io->in) {
1475                         r = pio_copy_data(vcpu);
1476                         if (r) {
1477                                 kvm_x86_ops->cache_regs(vcpu);
1478                                 return r;
1479                         }
1480                 }
1481
1482                 delta = 1;
1483                 if (io->rep) {
1484                         delta *= io->cur_count;
1485                         /*
1486                          * The size of the register should really depend on
1487                          * current address size.
1488                          */
1489                         vcpu->regs[VCPU_REGS_RCX] -= delta;
1490                 }
1491                 if (io->down)
1492                         delta = -delta;
1493                 delta *= io->size;
1494                 if (io->in)
1495                         vcpu->regs[VCPU_REGS_RDI] += delta;
1496                 else
1497                         vcpu->regs[VCPU_REGS_RSI] += delta;
1498         }
1499
1500         kvm_x86_ops->decache_regs(vcpu);
1501
1502         io->count -= io->cur_count;
1503         io->cur_count = 0;
1504
1505         return 0;
1506 }
1507
1508 static void kernel_pio(struct kvm_io_device *pio_dev,
1509                        struct kvm_vcpu *vcpu,
1510                        void *pd)
1511 {
1512         /* TODO: String I/O for in kernel device */
1513
1514         mutex_lock(&vcpu->kvm->lock);
1515         if (vcpu->pio.in)
1516                 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1517                                   vcpu->pio.size,
1518                                   pd);
1519         else
1520                 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1521                                    vcpu->pio.size,
1522                                    pd);
1523         mutex_unlock(&vcpu->kvm->lock);
1524 }
1525
1526 static void pio_string_write(struct kvm_io_device *pio_dev,
1527                              struct kvm_vcpu *vcpu)
1528 {
1529         struct kvm_pio_request *io = &vcpu->pio;
1530         void *pd = vcpu->pio_data;
1531         int i;
1532
1533         mutex_lock(&vcpu->kvm->lock);
1534         for (i = 0; i < io->cur_count; i++) {
1535                 kvm_iodevice_write(pio_dev, io->port,
1536                                    io->size,
1537                                    pd);
1538                 pd += io->size;
1539         }
1540         mutex_unlock(&vcpu->kvm->lock);
1541 }
1542
1543 static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1544                                                gpa_t addr)
1545 {
1546         return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1547 }
1548
1549 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1550                   int size, unsigned port)
1551 {
1552         struct kvm_io_device *pio_dev;
1553
1554         vcpu->run->exit_reason = KVM_EXIT_IO;
1555         vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1556         vcpu->run->io.size = vcpu->pio.size = size;
1557         vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1558         vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1559         vcpu->run->io.port = vcpu->pio.port = port;
1560         vcpu->pio.in = in;
1561         vcpu->pio.string = 0;
1562         vcpu->pio.down = 0;
1563         vcpu->pio.guest_page_offset = 0;
1564         vcpu->pio.rep = 0;
1565
1566         kvm_x86_ops->cache_regs(vcpu);
1567         memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
1568         kvm_x86_ops->decache_regs(vcpu);
1569
1570         kvm_x86_ops->skip_emulated_instruction(vcpu);
1571
1572         pio_dev = vcpu_find_pio_dev(vcpu, port);
1573         if (pio_dev) {
1574                 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
1575                 complete_pio(vcpu);
1576                 return 1;
1577         }
1578         return 0;
1579 }
1580 EXPORT_SYMBOL_GPL(kvm_emulate_pio);
1581
1582 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1583                   int size, unsigned long count, int down,
1584                   gva_t address, int rep, unsigned port)
1585 {
1586         unsigned now, in_page;
1587         int i, ret = 0;
1588         int nr_pages = 1;
1589         struct page *page;
1590         struct kvm_io_device *pio_dev;
1591
1592         vcpu->run->exit_reason = KVM_EXIT_IO;
1593         vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1594         vcpu->run->io.size = vcpu->pio.size = size;
1595         vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1596         vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
1597         vcpu->run->io.port = vcpu->pio.port = port;
1598         vcpu->pio.in = in;
1599         vcpu->pio.string = 1;
1600         vcpu->pio.down = down;
1601         vcpu->pio.guest_page_offset = offset_in_page(address);
1602         vcpu->pio.rep = rep;
1603
1604         if (!count) {
1605                 kvm_x86_ops->skip_emulated_instruction(vcpu);
1606                 return 1;
1607         }
1608
1609         if (!down)
1610                 in_page = PAGE_SIZE - offset_in_page(address);
1611         else
1612                 in_page = offset_in_page(address) + size;
1613         now = min(count, (unsigned long)in_page / size);
1614         if (!now) {
1615                 /*
1616                  * String I/O straddles page boundary.  Pin two guest pages
1617                  * so that we satisfy atomicity constraints.  Do just one
1618                  * transaction to avoid complexity.
1619                  */
1620                 nr_pages = 2;
1621                 now = 1;
1622         }
1623         if (down) {
1624                 /*
1625                  * String I/O in reverse.  Yuck.  Kill the guest, fix later.
1626                  */
1627                 pr_unimpl(vcpu, "guest string pio down\n");
1628                 inject_gp(vcpu);
1629                 return 1;
1630         }
1631         vcpu->run->io.count = now;
1632         vcpu->pio.cur_count = now;
1633
1634         if (vcpu->pio.cur_count == vcpu->pio.count)
1635                 kvm_x86_ops->skip_emulated_instruction(vcpu);
1636
1637         for (i = 0; i < nr_pages; ++i) {
1638                 mutex_lock(&vcpu->kvm->lock);
1639                 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
1640                 vcpu->pio.guest_pages[i] = page;
1641                 mutex_unlock(&vcpu->kvm->lock);
1642                 if (!page) {
1643                         inject_gp(vcpu);
1644                         free_pio_guest_pages(vcpu);
1645                         return 1;
1646                 }
1647         }
1648
1649         pio_dev = vcpu_find_pio_dev(vcpu, port);
1650         if (!vcpu->pio.in) {
1651                 /* string PIO write */
1652                 ret = pio_copy_data(vcpu);
1653                 if (ret >= 0 && pio_dev) {
1654                         pio_string_write(pio_dev, vcpu);
1655                         complete_pio(vcpu);
1656                         if (vcpu->pio.count == 0)
1657                                 ret = 1;
1658                 }
1659         } else if (pio_dev)
1660                 pr_unimpl(vcpu, "no string pio read support yet, "
1661                        "port %x size %d count %ld\n",
1662                         port, size, count);
1663
1664         return ret;
1665 }
1666 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
1667
1668 int kvm_arch_init(void *opaque)
1669 {
1670         struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
1671
1672         kvm_init_msr_list();
1673
1674         if (kvm_x86_ops) {
1675                 printk(KERN_ERR "kvm: already loaded the other module\n");
1676                 return -EEXIST;
1677         }
1678
1679         if (!ops->cpu_has_kvm_support()) {
1680                 printk(KERN_ERR "kvm: no hardware support\n");
1681                 return -EOPNOTSUPP;
1682         }
1683         if (ops->disabled_by_bios()) {
1684                 printk(KERN_ERR "kvm: disabled by bios\n");
1685                 return -EOPNOTSUPP;
1686         }
1687
1688         kvm_x86_ops = ops;
1689
1690         return 0;
1691 }
1692
1693 void kvm_arch_exit(void)
1694 {
1695         kvm_x86_ops = NULL;
1696  }
1697
1698 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1699 {
1700         ++vcpu->stat.halt_exits;
1701         if (irqchip_in_kernel(vcpu->kvm)) {
1702                 vcpu->mp_state = VCPU_MP_STATE_HALTED;
1703                 kvm_vcpu_block(vcpu);
1704                 if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
1705                         return -EINTR;
1706                 return 1;
1707         } else {
1708                 vcpu->run->exit_reason = KVM_EXIT_HLT;
1709                 return 0;
1710         }
1711 }
1712 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1713
1714 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
1715 {
1716         unsigned long nr, a0, a1, a2, a3, ret;
1717
1718         kvm_x86_ops->cache_regs(vcpu);
1719
1720         nr = vcpu->regs[VCPU_REGS_RAX];
1721         a0 = vcpu->regs[VCPU_REGS_RBX];
1722         a1 = vcpu->regs[VCPU_REGS_RCX];
1723         a2 = vcpu->regs[VCPU_REGS_RDX];
1724         a3 = vcpu->regs[VCPU_REGS_RSI];
1725
1726         if (!is_long_mode(vcpu)) {
1727                 nr &= 0xFFFFFFFF;
1728                 a0 &= 0xFFFFFFFF;
1729                 a1 &= 0xFFFFFFFF;
1730                 a2 &= 0xFFFFFFFF;
1731                 a3 &= 0xFFFFFFFF;
1732         }
1733
1734         switch (nr) {
1735         default:
1736                 ret = -KVM_ENOSYS;
1737                 break;
1738         }
1739         vcpu->regs[VCPU_REGS_RAX] = ret;
1740         kvm_x86_ops->decache_regs(vcpu);
1741         return 0;
1742 }
1743 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
1744
1745 int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
1746 {
1747         char instruction[3];
1748         int ret = 0;
1749
1750         mutex_lock(&vcpu->kvm->lock);
1751
1752         /*
1753          * Blow out the MMU to ensure that no other VCPU has an active mapping
1754          * to ensure that the updated hypercall appears atomically across all
1755          * VCPUs.
1756          */
1757         kvm_mmu_zap_all(vcpu->kvm);
1758
1759         kvm_x86_ops->cache_regs(vcpu);
1760         kvm_x86_ops->patch_hypercall(vcpu, instruction);
1761         if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu)
1762             != X86EMUL_CONTINUE)
1763                 ret = -EFAULT;
1764
1765         mutex_unlock(&vcpu->kvm->lock);
1766
1767         return ret;
1768 }
1769
1770 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1771 {
1772         return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1773 }
1774
1775 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1776 {
1777         struct descriptor_table dt = { limit, base };
1778
1779         kvm_x86_ops->set_gdt(vcpu, &dt);
1780 }
1781
1782 void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1783 {
1784         struct descriptor_table dt = { limit, base };
1785
1786         kvm_x86_ops->set_idt(vcpu, &dt);
1787 }
1788
1789 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1790                    unsigned long *rflags)
1791 {
1792         lmsw(vcpu, msw);
1793         *rflags = kvm_x86_ops->get_rflags(vcpu);
1794 }
1795
1796 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1797 {
1798         kvm_x86_ops->decache_cr4_guest_bits(vcpu);
1799         switch (cr) {
1800         case 0:
1801                 return vcpu->cr0;
1802         case 2:
1803                 return vcpu->cr2;
1804         case 3:
1805                 return vcpu->cr3;
1806         case 4:
1807                 return vcpu->cr4;
1808         default:
1809                 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1810                 return 0;
1811         }
1812 }
1813
1814 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1815                      unsigned long *rflags)
1816 {
1817         switch (cr) {
1818         case 0:
1819                 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
1820                 *rflags = kvm_x86_ops->get_rflags(vcpu);
1821                 break;
1822         case 2:
1823                 vcpu->cr2 = val;
1824                 break;
1825         case 3:
1826                 set_cr3(vcpu, val);
1827                 break;
1828         case 4:
1829                 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1830                 break;
1831         default:
1832                 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1833         }
1834 }
1835
1836 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1837 {
1838         int i;
1839         u32 function;
1840         struct kvm_cpuid_entry *e, *best;
1841
1842         kvm_x86_ops->cache_regs(vcpu);
1843         function = vcpu->regs[VCPU_REGS_RAX];
1844         vcpu->regs[VCPU_REGS_RAX] = 0;
1845         vcpu->regs[VCPU_REGS_RBX] = 0;
1846         vcpu->regs[VCPU_REGS_RCX] = 0;
1847         vcpu->regs[VCPU_REGS_RDX] = 0;
1848         best = NULL;
1849         for (i = 0; i < vcpu->cpuid_nent; ++i) {
1850                 e = &vcpu->cpuid_entries[i];
1851                 if (e->function == function) {
1852                         best = e;
1853                         break;
1854                 }
1855                 /*
1856                  * Both basic or both extended?
1857                  */
1858                 if (((e->function ^ function) & 0x80000000) == 0)
1859                         if (!best || e->function > best->function)
1860                                 best = e;
1861         }
1862         if (best) {
1863                 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1864                 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1865                 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1866                 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1867         }
1868         kvm_x86_ops->decache_regs(vcpu);
1869         kvm_x86_ops->skip_emulated_instruction(vcpu);
1870 }
1871 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
1872
1873 /*
1874  * Check if userspace requested an interrupt window, and that the
1875  * interrupt window is open.
1876  *
1877  * No need to exit to userspace if we already have an interrupt queued.
1878  */
1879 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1880                                           struct kvm_run *kvm_run)
1881 {
1882         return (!vcpu->irq_summary &&
1883                 kvm_run->request_interrupt_window &&
1884                 vcpu->interrupt_window_open &&
1885                 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
1886 }
1887
1888 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1889                               struct kvm_run *kvm_run)
1890 {
1891         kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
1892         kvm_run->cr8 = get_cr8(vcpu);
1893         kvm_run->apic_base = kvm_get_apic_base(vcpu);
1894         if (irqchip_in_kernel(vcpu->kvm))
1895                 kvm_run->ready_for_interrupt_injection = 1;
1896         else
1897                 kvm_run->ready_for_interrupt_injection =
1898                                         (vcpu->interrupt_window_open &&
1899                                          vcpu->irq_summary == 0);
1900 }
1901
1902 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1903 {
1904         int r;
1905
1906         if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
1907                 pr_debug("vcpu %d received sipi with vector # %x\n",
1908                        vcpu->vcpu_id, vcpu->sipi_vector);
1909                 kvm_lapic_reset(vcpu);
1910                 r = kvm_x86_ops->vcpu_reset(vcpu);
1911                 if (r)
1912                         return r;
1913                 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
1914         }
1915
1916 preempted:
1917         if (vcpu->guest_debug.enabled)
1918                 kvm_x86_ops->guest_debug_pre(vcpu);
1919
1920 again:
1921         r = kvm_mmu_reload(vcpu);
1922         if (unlikely(r))
1923                 goto out;
1924
1925         kvm_inject_pending_timer_irqs(vcpu);
1926
1927         preempt_disable();
1928
1929         kvm_x86_ops->prepare_guest_switch(vcpu);
1930         kvm_load_guest_fpu(vcpu);
1931
1932         local_irq_disable();
1933
1934         if (signal_pending(current)) {
1935                 local_irq_enable();
1936                 preempt_enable();
1937                 r = -EINTR;
1938                 kvm_run->exit_reason = KVM_EXIT_INTR;
1939                 ++vcpu->stat.signal_exits;
1940                 goto out;
1941         }
1942
1943         if (irqchip_in_kernel(vcpu->kvm))
1944                 kvm_x86_ops->inject_pending_irq(vcpu);
1945         else if (!vcpu->mmio_read_completed)
1946                 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
1947
1948         vcpu->guest_mode = 1;
1949         kvm_guest_enter();
1950
1951         if (vcpu->requests)
1952                 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
1953                         kvm_x86_ops->tlb_flush(vcpu);
1954
1955         kvm_x86_ops->run(vcpu, kvm_run);
1956
1957         vcpu->guest_mode = 0;
1958         local_irq_enable();
1959
1960         ++vcpu->stat.exits;
1961
1962         /*
1963          * We must have an instruction between local_irq_enable() and
1964          * kvm_guest_exit(), so the timer interrupt isn't delayed by
1965          * the interrupt shadow.  The stat.exits increment will do nicely.
1966          * But we need to prevent reordering, hence this barrier():
1967          */
1968         barrier();
1969
1970         kvm_guest_exit();
1971
1972         preempt_enable();
1973
1974         /*
1975          * Profile KVM exit RIPs:
1976          */
1977         if (unlikely(prof_on == KVM_PROFILING)) {
1978                 kvm_x86_ops->cache_regs(vcpu);
1979                 profile_hit(KVM_PROFILING, (void *)vcpu->rip);
1980         }
1981
1982         r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
1983
1984         if (r > 0) {
1985                 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
1986                         r = -EINTR;
1987                         kvm_run->exit_reason = KVM_EXIT_INTR;
1988                         ++vcpu->stat.request_irq_exits;
1989                         goto out;
1990                 }
1991                 if (!need_resched()) {
1992                         ++vcpu->stat.light_exits;
1993                         goto again;
1994                 }
1995         }
1996
1997 out:
1998         if (r > 0) {
1999                 kvm_resched(vcpu);
2000                 goto preempted;
2001         }
2002
2003         post_kvm_run_save(vcpu, kvm_run);
2004
2005         return r;
2006 }
2007
2008 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2009 {
2010         int r;
2011         sigset_t sigsaved;
2012
2013         vcpu_load(vcpu);
2014
2015         if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2016                 kvm_vcpu_block(vcpu);
2017                 vcpu_put(vcpu);
2018                 return -EAGAIN;
2019         }
2020
2021         if (vcpu->sigset_active)
2022                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2023
2024         /* re-sync apic's tpr */
2025         if (!irqchip_in_kernel(vcpu->kvm))
2026                 set_cr8(vcpu, kvm_run->cr8);
2027
2028         if (vcpu->pio.cur_count) {
2029                 r = complete_pio(vcpu);
2030                 if (r)
2031                         goto out;
2032         }
2033 #if CONFIG_HAS_IOMEM
2034         if (vcpu->mmio_needed) {
2035                 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2036                 vcpu->mmio_read_completed = 1;
2037                 vcpu->mmio_needed = 0;
2038                 r = emulate_instruction(vcpu, kvm_run,
2039                                         vcpu->mmio_fault_cr2, 0, 1);
2040                 if (r == EMULATE_DO_MMIO) {
2041                         /*
2042                          * Read-modify-write.  Back to userspace.
2043                          */
2044                         r = 0;
2045                         goto out;
2046                 }
2047         }
2048 #endif
2049         if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
2050                 kvm_x86_ops->cache_regs(vcpu);
2051                 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
2052                 kvm_x86_ops->decache_regs(vcpu);
2053         }
2054
2055         r = __vcpu_run(vcpu, kvm_run);
2056
2057 out:
2058         if (vcpu->sigset_active)
2059                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2060
2061         vcpu_put(vcpu);
2062         return r;
2063 }
2064
2065 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2066 {
2067         vcpu_load(vcpu);
2068
2069         kvm_x86_ops->cache_regs(vcpu);
2070
2071         regs->rax = vcpu->regs[VCPU_REGS_RAX];
2072         regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2073         regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2074         regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2075         regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2076         regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2077         regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2078         regs->rbp = vcpu->regs[VCPU_REGS_RBP];
2079 #ifdef CONFIG_X86_64
2080         regs->r8 = vcpu->regs[VCPU_REGS_R8];
2081         regs->r9 = vcpu->regs[VCPU_REGS_R9];
2082         regs->r10 = vcpu->regs[VCPU_REGS_R10];
2083         regs->r11 = vcpu->regs[VCPU_REGS_R11];
2084         regs->r12 = vcpu->regs[VCPU_REGS_R12];
2085         regs->r13 = vcpu->regs[VCPU_REGS_R13];
2086         regs->r14 = vcpu->regs[VCPU_REGS_R14];
2087         regs->r15 = vcpu->regs[VCPU_REGS_R15];
2088 #endif
2089
2090         regs->rip = vcpu->rip;
2091         regs->rflags = kvm_x86_ops->get_rflags(vcpu);
2092
2093         /*
2094          * Don't leak debug flags in case they were set for guest debugging
2095          */
2096         if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2097                 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2098
2099         vcpu_put(vcpu);
2100
2101         return 0;
2102 }
2103
2104 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2105 {
2106         vcpu_load(vcpu);
2107
2108         vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2109         vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2110         vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2111         vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2112         vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2113         vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2114         vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2115         vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
2116 #ifdef CONFIG_X86_64
2117         vcpu->regs[VCPU_REGS_R8] = regs->r8;
2118         vcpu->regs[VCPU_REGS_R9] = regs->r9;
2119         vcpu->regs[VCPU_REGS_R10] = regs->r10;
2120         vcpu->regs[VCPU_REGS_R11] = regs->r11;
2121         vcpu->regs[VCPU_REGS_R12] = regs->r12;
2122         vcpu->regs[VCPU_REGS_R13] = regs->r13;
2123         vcpu->regs[VCPU_REGS_R14] = regs->r14;
2124         vcpu->regs[VCPU_REGS_R15] = regs->r15;
2125 #endif
2126
2127         vcpu->rip = regs->rip;
2128         kvm_x86_ops->set_rflags(vcpu, regs->rflags);
2129
2130         kvm_x86_ops->decache_regs(vcpu);
2131
2132         vcpu_put(vcpu);
2133
2134         return 0;
2135 }
2136
2137 static void get_segment(struct kvm_vcpu *vcpu,
2138                         struct kvm_segment *var, int seg)
2139 {
2140         return kvm_x86_ops->get_segment(vcpu, var, seg);
2141 }
2142
2143 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2144 {
2145         struct kvm_segment cs;
2146
2147         get_segment(vcpu, &cs, VCPU_SREG_CS);
2148         *db = cs.db;
2149         *l = cs.l;
2150 }
2151 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2152
2153 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2154                                   struct kvm_sregs *sregs)
2155 {
2156         struct descriptor_table dt;
2157         int pending_vec;
2158
2159         vcpu_load(vcpu);
2160
2161         get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2162         get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2163         get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2164         get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2165         get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2166         get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2167
2168         get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2169         get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2170
2171         kvm_x86_ops->get_idt(vcpu, &dt);
2172         sregs->idt.limit = dt.limit;
2173         sregs->idt.base = dt.base;
2174         kvm_x86_ops->get_gdt(vcpu, &dt);
2175         sregs->gdt.limit = dt.limit;
2176         sregs->gdt.base = dt.base;
2177
2178         kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2179         sregs->cr0 = vcpu->cr0;
2180         sregs->cr2 = vcpu->cr2;
2181         sregs->cr3 = vcpu->cr3;
2182         sregs->cr4 = vcpu->cr4;
2183         sregs->cr8 = get_cr8(vcpu);
2184         sregs->efer = vcpu->shadow_efer;
2185         sregs->apic_base = kvm_get_apic_base(vcpu);
2186
2187         if (irqchip_in_kernel(vcpu->kvm)) {
2188                 memset(sregs->interrupt_bitmap, 0,
2189                        sizeof sregs->interrupt_bitmap);
2190                 pending_vec = kvm_x86_ops->get_irq(vcpu);
2191                 if (pending_vec >= 0)
2192                         set_bit(pending_vec,
2193                                 (unsigned long *)sregs->interrupt_bitmap);
2194         } else
2195                 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2196                        sizeof sregs->interrupt_bitmap);
2197
2198         vcpu_put(vcpu);
2199
2200         return 0;
2201 }
2202
2203 static void set_segment(struct kvm_vcpu *vcpu,
2204                         struct kvm_segment *var, int seg)
2205 {
2206         return kvm_x86_ops->set_segment(vcpu, var, seg);
2207 }
2208
2209 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2210                                   struct kvm_sregs *sregs)
2211 {
2212         int mmu_reset_needed = 0;
2213         int i, pending_vec, max_bits;
2214         struct descriptor_table dt;
2215
2216         vcpu_load(vcpu);
2217
2218         dt.limit = sregs->idt.limit;
2219         dt.base = sregs->idt.base;
2220         kvm_x86_ops->set_idt(vcpu, &dt);
2221         dt.limit = sregs->gdt.limit;
2222         dt.base = sregs->gdt.base;
2223         kvm_x86_ops->set_gdt(vcpu, &dt);
2224
2225         vcpu->cr2 = sregs->cr2;
2226         mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2227         vcpu->cr3 = sregs->cr3;
2228
2229         set_cr8(vcpu, sregs->cr8);
2230
2231         mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
2232 #ifdef CONFIG_X86_64
2233         kvm_x86_ops->set_efer(vcpu, sregs->efer);
2234 #endif
2235         kvm_set_apic_base(vcpu, sregs->apic_base);
2236
2237         kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2238
2239         mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
2240         vcpu->cr0 = sregs->cr0;
2241         kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
2242
2243         mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
2244         kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
2245         if (!is_long_mode(vcpu) && is_pae(vcpu))
2246                 load_pdptrs(vcpu, vcpu->cr3);
2247
2248         if (mmu_reset_needed)
2249                 kvm_mmu_reset_context(vcpu);
2250
2251         if (!irqchip_in_kernel(vcpu->kvm)) {
2252                 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2253                        sizeof vcpu->irq_pending);
2254                 vcpu->irq_summary = 0;
2255                 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2256                         if (vcpu->irq_pending[i])
2257                                 __set_bit(i, &vcpu->irq_summary);
2258         } else {
2259                 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2260                 pending_vec = find_first_bit(
2261                         (const unsigned long *)sregs->interrupt_bitmap,
2262                         max_bits);
2263                 /* Only pending external irq is handled here */
2264                 if (pending_vec < max_bits) {
2265                         kvm_x86_ops->set_irq(vcpu, pending_vec);
2266                         pr_debug("Set back pending irq %d\n",
2267                                  pending_vec);
2268                 }
2269         }
2270
2271         set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2272         set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2273         set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2274         set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2275         set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2276         set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2277
2278         set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2279         set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2280
2281         vcpu_put(vcpu);
2282
2283         return 0;
2284 }
2285
2286 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2287                                     struct kvm_debug_guest *dbg)
2288 {
2289         int r;
2290
2291         vcpu_load(vcpu);
2292
2293         r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
2294
2295         vcpu_put(vcpu);
2296
2297         return r;
2298 }
2299
2300 /*
2301  * fxsave fpu state.  Taken from x86_64/processor.h.  To be killed when
2302  * we have asm/x86/processor.h
2303  */
2304 struct fxsave {
2305         u16     cwd;
2306         u16     swd;
2307         u16     twd;
2308         u16     fop;
2309         u64     rip;
2310         u64     rdp;
2311         u32     mxcsr;
2312         u32     mxcsr_mask;
2313         u32     st_space[32];   /* 8*16 bytes for each FP-reg = 128 bytes */
2314 #ifdef CONFIG_X86_64
2315         u32     xmm_space[64];  /* 16*16 bytes for each XMM-reg = 256 bytes */
2316 #else
2317         u32     xmm_space[32];  /* 8*16 bytes for each XMM-reg = 128 bytes */
2318 #endif
2319 };
2320
2321 /*
2322  * Translate a guest virtual address to a guest physical address.
2323  */
2324 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2325                                     struct kvm_translation *tr)
2326 {
2327         unsigned long vaddr = tr->linear_address;
2328         gpa_t gpa;
2329
2330         vcpu_load(vcpu);
2331         mutex_lock(&vcpu->kvm->lock);
2332         gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2333         tr->physical_address = gpa;
2334         tr->valid = gpa != UNMAPPED_GVA;
2335         tr->writeable = 1;
2336         tr->usermode = 0;
2337         mutex_unlock(&vcpu->kvm->lock);
2338         vcpu_put(vcpu);
2339
2340         return 0;
2341 }
2342
2343 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2344 {
2345         struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
2346
2347         vcpu_load(vcpu);
2348
2349         memcpy(fpu->fpr, fxsave->st_space, 128);
2350         fpu->fcw = fxsave->cwd;
2351         fpu->fsw = fxsave->swd;
2352         fpu->ftwx = fxsave->twd;
2353         fpu->last_opcode = fxsave->fop;
2354         fpu->last_ip = fxsave->rip;
2355         fpu->last_dp = fxsave->rdp;
2356         memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2357
2358         vcpu_put(vcpu);
2359
2360         return 0;
2361 }
2362
2363 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2364 {
2365         struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
2366
2367         vcpu_load(vcpu);
2368
2369         memcpy(fxsave->st_space, fpu->fpr, 128);
2370         fxsave->cwd = fpu->fcw;
2371         fxsave->swd = fpu->fsw;
2372         fxsave->twd = fpu->ftwx;
2373         fxsave->fop = fpu->last_opcode;
2374         fxsave->rip = fpu->last_ip;
2375         fxsave->rdp = fpu->last_dp;
2376         memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2377
2378         vcpu_put(vcpu);
2379
2380         return 0;
2381 }
2382
2383 void fx_init(struct kvm_vcpu *vcpu)
2384 {
2385         unsigned after_mxcsr_mask;
2386
2387         /* Initialize guest FPU by resetting ours and saving into guest's */
2388         preempt_disable();
2389         fx_save(&vcpu->host_fx_image);
2390         fpu_init();
2391         fx_save(&vcpu->guest_fx_image);
2392         fx_restore(&vcpu->host_fx_image);
2393         preempt_enable();
2394
2395         vcpu->cr0 |= X86_CR0_ET;
2396         after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
2397         vcpu->guest_fx_image.mxcsr = 0x1f80;
2398         memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
2399                0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
2400 }
2401 EXPORT_SYMBOL_GPL(fx_init);
2402
2403 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
2404 {
2405         if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
2406                 return;
2407
2408         vcpu->guest_fpu_loaded = 1;
2409         fx_save(&vcpu->host_fx_image);
2410         fx_restore(&vcpu->guest_fx_image);
2411 }
2412 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
2413
2414 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
2415 {
2416         if (!vcpu->guest_fpu_loaded)
2417                 return;
2418
2419         vcpu->guest_fpu_loaded = 0;
2420         fx_save(&vcpu->guest_fx_image);
2421         fx_restore(&vcpu->host_fx_image);
2422 }
2423 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
2424
2425 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
2426 {
2427         kvm_x86_ops->vcpu_free(vcpu);
2428 }
2429
2430 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
2431                                                 unsigned int id)
2432 {
2433         int r;
2434         struct kvm_vcpu *vcpu = kvm_x86_ops->vcpu_create(kvm, id);
2435
2436         if (IS_ERR(vcpu)) {
2437                 r = -ENOMEM;
2438                 goto fail;
2439         }
2440
2441         /* We do fxsave: this must be aligned. */
2442         BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2443
2444         vcpu_load(vcpu);
2445         r = kvm_arch_vcpu_reset(vcpu);
2446         if (r == 0)
2447                 r = kvm_mmu_setup(vcpu);
2448         vcpu_put(vcpu);
2449         if (r < 0)
2450                 goto free_vcpu;
2451
2452         return vcpu;
2453 free_vcpu:
2454         kvm_x86_ops->vcpu_free(vcpu);
2455 fail:
2456         return ERR_PTR(r);
2457 }
2458
2459 void kvm_arch_vcpu_destory(struct kvm_vcpu *vcpu)
2460 {
2461         vcpu_load(vcpu);
2462         kvm_mmu_unload(vcpu);
2463         vcpu_put(vcpu);
2464
2465         kvm_x86_ops->vcpu_free(vcpu);
2466 }
2467
2468 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
2469 {
2470         return kvm_x86_ops->vcpu_reset(vcpu);
2471 }
2472
2473 void kvm_arch_hardware_enable(void *garbage)
2474 {
2475         kvm_x86_ops->hardware_enable(garbage);
2476 }
2477
2478 void kvm_arch_hardware_disable(void *garbage)
2479 {
2480         kvm_x86_ops->hardware_disable(garbage);
2481 }
2482
2483 int kvm_arch_hardware_setup(void)
2484 {
2485         return kvm_x86_ops->hardware_setup();
2486 }
2487
2488 void kvm_arch_hardware_unsetup(void)
2489 {
2490         kvm_x86_ops->hardware_unsetup();
2491 }
2492
2493 void kvm_arch_check_processor_compat(void *rtn)
2494 {
2495         kvm_x86_ops->check_processor_compatibility(rtn);
2496 }
2497
2498 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
2499 {
2500         struct page *page;
2501         struct kvm *kvm;
2502         int r;
2503
2504         BUG_ON(vcpu->kvm == NULL);
2505         kvm = vcpu->kvm;
2506
2507         vcpu->mmu.root_hpa = INVALID_PAGE;
2508         if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0)
2509                 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
2510         else
2511                 vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
2512
2513         page = alloc_page(GFP_KERNEL | __GFP_ZERO);
2514         if (!page) {
2515                 r = -ENOMEM;
2516                 goto fail;
2517         }
2518         vcpu->pio_data = page_address(page);
2519
2520         r = kvm_mmu_create(vcpu);
2521         if (r < 0)
2522                 goto fail_free_pio_data;
2523
2524         if (irqchip_in_kernel(kvm)) {
2525                 r = kvm_create_lapic(vcpu);
2526                 if (r < 0)
2527                         goto fail_mmu_destroy;
2528         }
2529
2530         return 0;
2531
2532 fail_mmu_destroy:
2533         kvm_mmu_destroy(vcpu);
2534 fail_free_pio_data:
2535         free_page((unsigned long)vcpu->pio_data);
2536 fail:
2537         return r;
2538 }
2539
2540 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
2541 {
2542         kvm_free_lapic(vcpu);
2543         kvm_mmu_destroy(vcpu);
2544         free_page((unsigned long)vcpu->pio_data);
2545 }
2546
2547 struct  kvm *kvm_arch_create_vm(void)
2548 {
2549         struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
2550
2551         if (!kvm)
2552                 return ERR_PTR(-ENOMEM);
2553
2554         INIT_LIST_HEAD(&kvm->active_mmu_pages);
2555
2556         return kvm;
2557 }
2558
2559 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
2560 {
2561         vcpu_load(vcpu);
2562         kvm_mmu_unload(vcpu);
2563         vcpu_put(vcpu);
2564 }
2565
2566 static void kvm_free_vcpus(struct kvm *kvm)
2567 {
2568         unsigned int i;
2569
2570         /*
2571          * Unpin any mmu pages first.
2572          */
2573         for (i = 0; i < KVM_MAX_VCPUS; ++i)
2574                 if (kvm->vcpus[i])
2575                         kvm_unload_vcpu_mmu(kvm->vcpus[i]);
2576         for (i = 0; i < KVM_MAX_VCPUS; ++i) {
2577                 if (kvm->vcpus[i]) {
2578                         kvm_arch_vcpu_free(kvm->vcpus[i]);
2579                         kvm->vcpus[i] = NULL;
2580                 }
2581         }
2582
2583 }
2584
2585 void kvm_arch_destroy_vm(struct kvm *kvm)
2586 {
2587         kfree(kvm->vpic);
2588         kfree(kvm->vioapic);
2589         kvm_free_vcpus(kvm);
2590         kvm_free_physmem(kvm);
2591         kfree(kvm);
2592 }