kvm-all.c

   1 /*
   2  * QEMU KVM support
   3  *
   4  * Copyright IBM, Corp. 2008
   5  *           Red Hat, Inc. 2008
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Glauber Costa     <gcosta@redhat.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12  * See the COPYING file in the top-level directory.
  13  *
  14  */
  15
  16 #include <sys/types.h>
  17 #include <sys/ioctl.h>
  18 #include <sys/mman.h>
  19 #include <stdarg.h>
  20
  21 #include <linux/kvm.h>
  22
  23 #include "qemu-common.h"
  24 #include "qemu-barrier.h"
  25 #include "sysemu.h"
  26 #include "hw/hw.h"
  27 #include "gdbstub.h"
  28 #include "kvm.h"
  29 #include "bswap.h"
  30
  31 /* This check must be after config-host.h is included */
  32 #ifdef CONFIG_EVENTFD
  33 #include <sys/eventfd.h>
  34 #endif
  35
  36 /* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */
  37 #define PAGE_SIZE TARGET_PAGE_SIZE
  38
  39 //#define DEBUG_KVM
  40
  41 #ifdef DEBUG_KVM
  42 #define DPRINTF(fmt, ...) \
  43     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  44 #else
  45 #define DPRINTF(fmt, ...) \
  46     do { } while (0)
  47 #endif
  48
  49 #ifdef OBSOLETE_KVM_IMPL
  50
  51 typedef struct KVMSlot
  52 {
  53     target_phys_addr_t start_addr;
  54     ram_addr_t memory_size;
  55     ram_addr_t phys_offset;
  56     int slot;
  57     int flags;
  58 } KVMSlot;
  59
  60 typedef struct kvm_dirty_log KVMDirtyLog;
  61
  62 struct KVMState
  63 {
  64     KVMSlot slots[32];
  65     int fd;
  66     int vmfd;
  67     int coalesced_mmio;
  68     struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
  69     int broken_set_mem_region;
  70     int migration_log;
  71     int vcpu_events;
  72     int robust_singlestep;
  73     int debugregs;
  74 #ifdef KVM_CAP_SET_GUEST_DEBUG
  75     struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
  76 #endif
  77     int irqchip_in_kernel;
  78     int pit_in_kernel;
  79     int xsave, xcrs;
  80     int many_ioeventfds;
  81 };
  82
  83 KVMState *kvm_state;
  84
  85
  86 static const KVMCapabilityInfo kvm_required_capabilites[] = {
  87     KVM_CAP_INFO(USER_MEMORY),
  88     KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS),
  89     KVM_CAP_LAST_INFO
  90 };
  91
  92 #endif
  93
  94 static KVMSlot *kvm_alloc_slot(KVMState *s)
  95 {
  96     int i;
  97
  98     for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
  99         if (s->slots[i].memory_size == 0) {
 100             return &s->slots[i];
 101         }
 102     }
 103
 104     fprintf(stderr, "%s: no free slot available\n", __func__);
 105     abort();
 106 }
 107
 108 static KVMSlot *kvm_lookup_matching_slot(KVMState *s,
 109                                          target_phys_addr_t start_addr,
 110                                          target_phys_addr_t end_addr)
 111 {
 112     int i;
 113
 114     for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
 115         KVMSlot *mem = &s->slots[i];
 116
 117         if (start_addr == mem->start_addr &&
 118             end_addr == mem->start_addr + mem->memory_size) {
 119             return mem;
 120         }
 121     }
 122
 123     return NULL;
 124 }
 125
 126 /*
 127  * Find overlapping slot with lowest start address
 128  */
 129 static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
 130                                             target_phys_addr_t start_addr,
 131                                             target_phys_addr_t end_addr)
 132 {
 133     KVMSlot *found = NULL;
 134     int i;
 135
 136     for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
 137         KVMSlot *mem = &s->slots[i];
 138
 139         if (mem->memory_size == 0 ||
 140             (found && found->start_addr < mem->start_addr)) {
 141             continue;
 142         }
 143
 144         if (end_addr > mem->start_addr &&
 145             start_addr < mem->start_addr + mem->memory_size) {
 146             found = mem;
 147         }
 148     }
 149
 150     return found;
 151 }
 152
 153 int kvm_physical_memory_addr_from_ram(KVMState *s, ram_addr_t ram_addr,
 154                                       target_phys_addr_t *phys_addr)
 155 {
 156     int i;
 157
 158     for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
 159         KVMSlot *mem = &s->slots[i];
 160
 161         if (ram_addr >= mem->phys_offset &&
 162             ram_addr < mem->phys_offset + mem->memory_size) {
 163             *phys_addr = mem->start_addr + (ram_addr - mem->phys_offset);
 164             return 1;
 165         }
 166     }
 167
 168     return 0;
 169 }
 170
 171 static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot)
 172 {
 173     struct kvm_userspace_memory_region mem;
 174
 175     mem.slot = slot->slot;
 176     mem.guest_phys_addr = slot->start_addr;
 177     mem.memory_size = slot->memory_size;
 178     mem.userspace_addr = (unsigned long)qemu_safe_ram_ptr(slot->phys_offset);
 179     mem.flags = slot->flags;
 180     if (s->migration_log) {
 181         mem.flags |= KVM_MEM_LOG_DIRTY_PAGES;
 182     }
 183     return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
 184 }
 185
 186 #ifdef OBSOLETE_KVM_IMPL
 187 static void kvm_reset_vcpu(void *opaque)
 188 {
 189     CPUState *env = opaque;
 190
 191     kvm_arch_reset_vcpu(env);
 192 }
 193 #endif
 194
 195 int kvm_irqchip_in_kernel(void)
 196 {
 197     return kvm_state->irqchip_in_kernel;
 198 }
 199
 200 int kvm_pit_in_kernel(void)
 201 {
 202     return kvm_state->pit_in_kernel;
 203 }
 204
 205 #ifdef OBSOLETE_KVM_IMPL
 206 int kvm_init_vcpu(CPUState *env)
 207 {
 208     KVMState *s = kvm_state;
 209     long mmap_size;
 210     int ret;
 211
 212     DPRINTF("kvm_init_vcpu\n");
 213
 214     ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index);
 215     if (ret < 0) {
 216         DPRINTF("kvm_create_vcpu failed\n");
 217         goto err;
 218     }
 219
 220     env->kvm_fd = ret;
 221     env->kvm_state = s;
 222
 223     mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
 224     if (mmap_size < 0) {
 225         ret = mmap_size;
 226         DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
 227         goto err;
 228     }
 229
 230     env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
 231                         env->kvm_fd, 0);
 232     if (env->kvm_run == MAP_FAILED) {
 233         ret = -errno;
 234         DPRINTF("mmap'ing vcpu state failed\n");
 235         goto err;
 236     }
 237
 238     if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
 239         s->coalesced_mmio_ring =
 240             (void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE;
 241     }
 242
 243     ret = kvm_arch_init_vcpu(env);
 244     if (ret == 0) {
 245         qemu_register_reset(kvm_reset_vcpu, env);
 246         kvm_arch_reset_vcpu(env);
 247     }
 248 err:
 249     return ret;
 250 }
 251 #endif
 252
 253 /*
 254  * dirty pages logging control
 255  */
 256 static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr,
 257                                       ram_addr_t size, int flags, int mask)
 258 {
 259     KVMState *s = kvm_state;
 260     KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size);
 261     int old_flags;
 262
 263     if (mem == NULL)  {
 264             fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-"
 265                     TARGET_FMT_plx "\n", __func__, phys_addr,
 266                     (target_phys_addr_t)(phys_addr + size - 1));
 267             return -EINVAL;
 268     }
 269
 270     old_flags = mem->flags;
 271
 272     flags = (mem->flags & ~mask) | flags;
 273     mem->flags = flags;
 274
 275     /* If nothing changed effectively, no need to issue ioctl */
 276     if (s->migration_log) {
 277         flags |= KVM_MEM_LOG_DIRTY_PAGES;
 278     }
 279     if (flags == old_flags) {
 280             return 0;
 281     }
 282
 283     return kvm_set_user_memory_region(s, mem);
 284 }
 285
 286 static int kvm_log_start(CPUPhysMemoryClient *client,
 287                          target_phys_addr_t phys_addr, ram_addr_t size)
 288 {
 289     return kvm_dirty_pages_log_change(phys_addr, size, KVM_MEM_LOG_DIRTY_PAGES,
 290                                       KVM_MEM_LOG_DIRTY_PAGES);
 291 }
 292
 293 static int kvm_log_stop(CPUPhysMemoryClient *client,
 294                         target_phys_addr_t phys_addr, ram_addr_t size)
 295 {
 296     return kvm_dirty_pages_log_change(phys_addr, size, 0,
 297                                       KVM_MEM_LOG_DIRTY_PAGES);
 298 }
 299
 300 static int kvm_set_migration_log(int enable)
 301 {
 302     KVMState *s = kvm_state;
 303     KVMSlot *mem;
 304     int i, err;
 305
 306     s->migration_log = enable;
 307
 308     for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
 309         mem = &s->slots[i];
 310
 311         if (!mem->memory_size) {
 312             continue;
 313         }
 314         if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
 315             continue;
 316         }
 317         err = kvm_set_user_memory_region(s, mem);
 318         if (err) {
 319             return err;
 320         }
 321     }
 322     return 0;
 323 }
 324
 325 /* get kvm's dirty pages bitmap and update qemu's */
 326 static int kvm_get_dirty_pages_log_range(unsigned long start_addr,
 327                                          unsigned long *bitmap,
 328                                          unsigned long offset,
 329                                          unsigned long mem_size)
 330 {
 331     unsigned int i, j;
 332     unsigned long page_number, addr, addr1, c;
 333     ram_addr_t ram_addr;
 334     unsigned int len = ((mem_size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) /
 335         HOST_LONG_BITS;
 336
 337     /*
 338      * bitmap-traveling is faster than memory-traveling (for addr...)
 339      * especially when most of the memory is not dirty.
 340      */
 341     for (i = 0; i < len; i++) {
 342         if (bitmap[i] != 0) {
 343             c = leul_to_cpu(bitmap[i]);
 344             do {
 345                 j = ffsl(c) - 1;
 346                 c &= ~(1ul << j);
 347                 page_number = i * HOST_LONG_BITS + j;
 348                 addr1 = page_number * TARGET_PAGE_SIZE;
 349                 addr = offset + addr1;
 350                 ram_addr = cpu_get_physical_page_desc(addr);
 351                 cpu_physical_memory_set_dirty(ram_addr);
 352             } while (c != 0);
 353         }
 354     }
 355     return 0;
 356 }
 357
 358 #define ALIGN(x, y)  (((x)+(y)-1) & ~((y)-1))
 359
 360 /**
 361  * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
 362  * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty().
 363  * This means all bits are set to dirty.
 364  *
 365  * @start_add: start of logged region.
 366  * @end_addr: end of logged region.
 367  */
 368 static int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
 369                                           target_phys_addr_t end_addr)
 370 {
 371     KVMState *s = kvm_state;
 372     unsigned long size, allocated_size = 0;
 373     KVMDirtyLog d;
 374     KVMSlot *mem;
 375     int ret = 0;
 376
 377     d.dirty_bitmap = NULL;
 378     while (start_addr < end_addr) {
 379         mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr);
 380         if (mem == NULL) {
 381             break;
 382         }
 383
 384         size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), HOST_LONG_BITS) / 8;
 385         if (!d.dirty_bitmap) {
 386             d.dirty_bitmap = qemu_malloc(size);
 387         } else if (size > allocated_size) {
 388             d.dirty_bitmap = qemu_realloc(d.dirty_bitmap, size);
 389         }
 390         allocated_size = size;
 391         memset(d.dirty_bitmap, 0, allocated_size);
 392
 393         d.slot = mem->slot;
 394
 395         if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
 396             DPRINTF("ioctl failed %d\n", errno);
 397             ret = -1;
 398             break;
 399         }
 400
 401         kvm_get_dirty_pages_log_range(mem->start_addr, d.dirty_bitmap,
 402                                       mem->start_addr, mem->memory_size);
 403         start_addr = mem->start_addr + mem->memory_size;
 404     }
 405     qemu_free(d.dirty_bitmap);
 406
 407     return ret;
 408 }
 409
 410 int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
 411 {
 412     int ret = -ENOSYS;
 413     KVMState *s = kvm_state;
 414
 415     if (s->coalesced_mmio) {
 416         struct kvm_coalesced_mmio_zone zone;
 417
 418         zone.addr = start;
 419         zone.size = size;
 420
 421         ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
 422     }
 423
 424     return ret;
 425 }
 426
 427 int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
 428 {
 429     int ret = -ENOSYS;
 430     KVMState *s = kvm_state;
 431
 432     if (s->coalesced_mmio) {
 433         struct kvm_coalesced_mmio_zone zone;
 434
 435         zone.addr = start;
 436         zone.size = size;
 437
 438         ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
 439     }
 440
 441     return ret;
 442 }
 443
 444 int kvm_check_extension(KVMState *s, unsigned int extension)
 445 {
 446     int ret;
 447
 448     ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension);
 449     if (ret < 0) {
 450         ret = 0;
 451     }
 452
 453     return ret;
 454 }
 455
 456 static int kvm_check_many_ioeventfds(void)
 457 {
 458     /* Userspace can use ioeventfd for io notification.  This requires a host
 459      * that supports eventfd(2) and an I/O thread; since eventfd does not
 460      * support SIGIO it cannot interrupt the vcpu.
 461      *
 462      * Older kernels have a 6 device limit on the KVM io bus.  Find out so we
 463      * can avoid creating too many ioeventfds.
 464      */
 465 #if defined(CONFIG_EVENTFD) /* && defined(CONFIG_IOTHREAD) */
 466     int ioeventfds[7];
 467     int i, ret = 0;
 468     for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) {
 469         ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
 470         if (ioeventfds[i] < 0) {
 471             break;
 472         }
 473         ret = kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, true);
 474         if (ret < 0) {
 475             close(ioeventfds[i]);
 476             break;
 477         }
 478     }
 479
 480     /* Decide whether many devices are supported or not */
 481     ret = i == ARRAY_SIZE(ioeventfds);
 482
 483     while (i-- > 0) {
 484         kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, false);
 485         close(ioeventfds[i]);
 486     }
 487     return ret;
 488 #else
 489     return 0;
 490 #endif
 491 }
 492
 493 #ifdef OBSOLETE_KVM_IMPL
 494 static const KVMCapabilityInfo *
 495 kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
 496 {
 497     while (list->name) {
 498         if (!kvm_check_extension(s, list->value)) {
 499             return list;
 500         }
 501         list++;
 502     }
 503     return NULL;
 504 }
 505 #endif
 506
 507 static void kvm_set_phys_mem(target_phys_addr_t start_addr, ram_addr_t size,
 508                              ram_addr_t phys_offset)
 509 {
 510     KVMState *s = kvm_state;
 511     ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK;
 512     KVMSlot *mem, old;
 513     int err;
 514
 515     /* kvm works in page size chunks, but the function may be called
 516        with sub-page size and unaligned start address. */
 517     size = TARGET_PAGE_ALIGN(size);
 518     start_addr = TARGET_PAGE_ALIGN(start_addr);
 519
 520     /* KVM does not support read-only slots */
 521     phys_offset &= ~IO_MEM_ROM;
 522
 523     while (1) {
 524         mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size);
 525         if (!mem) {
 526             break;
 527         }
 528
 529         if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr &&
 530             (start_addr + size <= mem->start_addr + mem->memory_size) &&
 531             (phys_offset - start_addr == mem->phys_offset - mem->start_addr)) {
 532             /* The new slot fits into the existing one and comes with
 533              * identical parameters - nothing to be done. */
 534             return;
 535         }
 536
 537         old = *mem;
 538
 539         /* unregister the overlapping slot */
 540         mem->memory_size = 0;
 541         err = kvm_set_user_memory_region(s, mem);
 542         if (err) {
 543             fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
 544                     __func__, strerror(-err));
 545             abort();
 546         }
 547
 548         /* Workaround for older KVM versions: we can't join slots, even not by
 549          * unregistering the previous ones and then registering the larger
 550          * slot. We have to maintain the existing fragmentation. Sigh.
 551          *
 552          * This workaround assumes that the new slot starts at the same
 553          * address as the first existing one. If not or if some overlapping
 554          * slot comes around later, we will fail (not seen in practice so far)
 555          * - and actually require a recent KVM version. */
 556         if (s->broken_set_mem_region &&
 557             old.start_addr == start_addr && old.memory_size < size &&
 558             flags < IO_MEM_UNASSIGNED) {
 559             mem = kvm_alloc_slot(s);
 560             mem->memory_size = old.memory_size;
 561             mem->start_addr = old.start_addr;
 562             mem->phys_offset = old.phys_offset;
 563             mem->flags = 0;
 564
 565             err = kvm_set_user_memory_region(s, mem);
 566             if (err) {
 567                 fprintf(stderr, "%s: error updating slot: %s\n", __func__,
 568                         strerror(-err));
 569                 abort();
 570             }
 571
 572             start_addr += old.memory_size;
 573             phys_offset += old.memory_size;
 574             size -= old.memory_size;
 575             continue;
 576         }
 577
 578         /* register prefix slot */
 579         if (old.start_addr < start_addr) {
 580             mem = kvm_alloc_slot(s);
 581             mem->memory_size = start_addr - old.start_addr;
 582             mem->start_addr = old.start_addr;
 583             mem->phys_offset = old.phys_offset;
 584             mem->flags = 0;
 585
 586             err = kvm_set_user_memory_region(s, mem);
 587             if (err) {
 588                 fprintf(stderr, "%s: error registering prefix slot: %s\n",
 589                         __func__, strerror(-err));
 590                 abort();
 591             }
 592         }
 593
 594         /* register suffix slot */
 595         if (old.start_addr + old.memory_size > start_addr + size) {
 596             ram_addr_t size_delta;
 597
 598             mem = kvm_alloc_slot(s);
 599             mem->start_addr = start_addr + size;
 600             size_delta = mem->start_addr - old.start_addr;
 601             mem->memory_size = old.memory_size - size_delta;
 602             mem->phys_offset = old.phys_offset + size_delta;
 603             mem->flags = 0;
 604
 605             err = kvm_set_user_memory_region(s, mem);
 606             if (err) {
 607                 fprintf(stderr, "%s: error registering suffix slot: %s\n",
 608                         __func__, strerror(-err));
 609                 abort();
 610             }
 611         }
 612     }
 613
 614     /* in case the KVM bug workaround already "consumed" the new slot */
 615     if (!size) {
 616         return;
 617     }
 618     /* KVM does not need to know about this memory */
 619     if (flags >= IO_MEM_UNASSIGNED) {
 620         return;
 621     }
 622     mem = kvm_alloc_slot(s);
 623     mem->memory_size = size;
 624     mem->start_addr = start_addr;
 625     mem->phys_offset = phys_offset;
 626     mem->flags = 0;
 627
 628     err = kvm_set_user_memory_region(s, mem);
 629     if (err) {
 630         fprintf(stderr, "%s: error registering slot: %s\n", __func__,
 631                 strerror(-err));
 632         abort();
 633     }
 634 }
 635
 636 static void kvm_client_set_memory(struct CPUPhysMemoryClient *client,
 637                                   target_phys_addr_t start_addr,
 638                                   ram_addr_t size, ram_addr_t phys_offset)
 639 {
 640     kvm_set_phys_mem(start_addr, size, phys_offset);
 641 }
 642
 643 static int kvm_client_sync_dirty_bitmap(struct CPUPhysMemoryClient *client,
 644                                         target_phys_addr_t start_addr,
 645                                         target_phys_addr_t end_addr)
 646 {
 647     return kvm_physical_sync_dirty_bitmap(start_addr, end_addr);
 648 }
 649
 650 static int kvm_client_migration_log(struct CPUPhysMemoryClient *client,
 651                                     int enable)
 652 {
 653     return kvm_set_migration_log(enable);
 654 }
 655
 656 static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
 657     .set_memory = kvm_client_set_memory,
 658     .sync_dirty_bitmap = kvm_client_sync_dirty_bitmap,
 659     .migration_log = kvm_client_migration_log,
 660     .log_start = kvm_log_start,
 661     .log_stop = kvm_log_stop,
 662 };
 663
 664 void kvm_cpu_register_phys_memory_client(void)
 665 {
 666     cpu_register_phys_memory_client(&kvm_cpu_phys_memory_client);
 667 }
 668
 669 #ifdef OBSOLETE_KVM_IMPL
 670
 671 int kvm_init(void)
 672 {
 673     static const char upgrade_note[] =
 674         "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
 675         "(see http://sourceforge.net/projects/kvm).\n";
 676     KVMState *s;
 677     const KVMCapabilityInfo *missing_cap;
 678     int ret;
 679     int i;
 680
 681     s = qemu_mallocz(sizeof(KVMState));
 682
 683 #ifdef KVM_CAP_SET_GUEST_DEBUG
 684     QTAILQ_INIT(&s->kvm_sw_breakpoints);
 685 #endif
 686     for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
 687         s->slots[i].slot = i;
 688     }
 689     s->vmfd = -1;
 690     s->fd = qemu_open("/dev/kvm", O_RDWR);
 691     if (s->fd == -1) {
 692         fprintf(stderr, "Could not access KVM kernel module: %m\n");
 693         ret = -errno;
 694         goto err;
 695     }
 696
 697     ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
 698     if (ret < KVM_API_VERSION) {
 699         if (ret > 0) {
 700             ret = -EINVAL;
 701         }
 702         fprintf(stderr, "kvm version too old\n");
 703         goto err;
 704     }
 705
 706     if (ret > KVM_API_VERSION) {
 707         ret = -EINVAL;
 708         fprintf(stderr, "kvm version not supported\n");
 709         goto err;
 710     }
 711
 712     s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
 713     if (s->vmfd < 0) {
 714 #ifdef TARGET_S390X
 715         fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
 716                         "your host kernel command line\n");
 717 #endif
 718         goto err;
 719     }
 720
 721     missing_cap = kvm_check_extension_list(s, kvm_required_capabilites);
 722     if (!missing_cap) {
 723         missing_cap =
 724             kvm_check_extension_list(s, kvm_arch_required_capabilities);
 725     }
 726     if (missing_cap) {
 727         ret = -EINVAL;
 728         fprintf(stderr, "kvm does not support %s\n%s",
 729                 missing_cap->name, upgrade_note);
 730         goto err;
 731     }
 732
 733     s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO);
 734
 735     s->broken_set_mem_region = 1;
 736 #ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS
 737     ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS);
 738     if (ret > 0) {
 739         s->broken_set_mem_region = 0;
 740     }
 741 #endif
 742
 743     s->vcpu_events = 0;
 744 #ifdef KVM_CAP_VCPU_EVENTS
 745     s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
 746 #endif
 747
 748     s->robust_singlestep = 0;
 749 #ifdef KVM_CAP_X86_ROBUST_SINGLESTEP
 750     s->robust_singlestep =
 751         kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP);
 752 #endif
 753
 754     s->debugregs = 0;
 755 #ifdef KVM_CAP_DEBUGREGS
 756     s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS);
 757 #endif
 758
 759     s->xsave = 0;
 760 #ifdef KVM_CAP_XSAVE
 761     s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE);
 762 #endif
 763
 764     s->xcrs = 0;
 765 #ifdef KVM_CAP_XCRS
 766     s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS);
 767 #endif
 768
 769     ret = kvm_arch_init(s);
 770     if (ret < 0) {
 771         goto err;
 772     }
 773
 774     kvm_state = s;
 775     cpu_register_phys_memory_client(&kvm_cpu_phys_memory_client);
 776
 777     s->many_ioeventfds = kvm_check_many_ioeventfds();
 778
 779     return 0;
 780
 781 err:
 782     if (s) {
 783         if (s->vmfd != -1) {
 784             close(s->vmfd);
 785         }
 786         if (s->fd != -1) {
 787             close(s->fd);
 788         }
 789     }
 790     qemu_free(s);
 791
 792     return ret;
 793 }
 794 #endif
 795
 796 static void kvm_handle_io(uint16_t port, void *data, int direction, int size,
 797                           uint32_t count)
 798 {
 799     int i;
 800     uint8_t *ptr = data;
 801
 802     for (i = 0; i < count; i++) {
 803         if (direction == KVM_EXIT_IO_IN) {
 804             switch (size) {
 805             case 1:
 806                 stb_p(ptr, cpu_inb(port));
 807                 break;
 808             case 2:
 809                 stw_p(ptr, cpu_inw(port));
 810                 break;
 811             case 4:
 812                 stl_p(ptr, cpu_inl(port));
 813                 break;
 814             }
 815         } else {
 816             switch (size) {
 817             case 1:
 818                 cpu_outb(port, ldub_p(ptr));
 819                 break;
 820             case 2:
 821                 cpu_outw(port, lduw_p(ptr));
 822                 break;
 823             case 4:
 824                 cpu_outl(port, ldl_p(ptr));
 825                 break;
 826             }
 827         }
 828
 829         ptr += size;
 830     }
 831 }
 832
 833 #ifdef KVM_CAP_INTERNAL_ERROR_DATA
 834 static int kvm_handle_internal_error(CPUState *env, struct kvm_run *run)
 835 {
 836     fprintf(stderr, "KVM internal error.");
 837     if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
 838         int i;
 839
 840         fprintf(stderr, " Suberror: %d\n", run->internal.suberror);
 841         for (i = 0; i < run->internal.ndata; ++i) {
 842             fprintf(stderr, "extra data[%d]: %"PRIx64"\n",
 843                     i, (uint64_t)run->internal.data[i]);
 844         }
 845     } else {
 846         fprintf(stderr, "\n");
 847     }
 848     if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
 849         fprintf(stderr, "emulation failure\n");
 850         if (!kvm_arch_stop_on_emulation_error(env)) {
 851             cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
 852             return 0;
 853         }
 854     }
 855     /* FIXME: Should trigger a qmp message to let management know
 856      * something went wrong.
 857      */
 858     return -1;
 859 }
 860 #endif
 861
 862 void kvm_flush_coalesced_mmio_buffer(void)
 863 {
 864     KVMState *s = kvm_state;
 865     if (s->coalesced_mmio_ring) {
 866         struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
 867         while (ring->first != ring->last) {
 868             struct kvm_coalesced_mmio *ent;
 869
 870             ent = &ring->coalesced_mmio[ring->first];
 871
 872             cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
 873             smp_wmb();
 874             ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
 875         }
 876     }
 877 }
 878
 879 #ifdef OBSOLETE_KVM_IMPL
 880
 881 static void do_kvm_cpu_synchronize_state(void *_env)
 882 {
 883     CPUState *env = _env;
 884
 885     if (!env->kvm_vcpu_dirty) {
 886         kvm_arch_get_registers(env);
 887         env->kvm_vcpu_dirty = 1;
 888     }
 889 }
 890
 891 void kvm_cpu_synchronize_state(CPUState *env)
 892 {
 893     if (!env->kvm_vcpu_dirty) {
 894         run_on_cpu(env, do_kvm_cpu_synchronize_state, env);
 895     }
 896 }
 897
 898 void kvm_cpu_synchronize_post_reset(CPUState *env)
 899 {
 900     kvm_arch_put_registers(env, KVM_PUT_RESET_STATE);
 901     env->kvm_vcpu_dirty = 0;
 902 }
 903
 904 void kvm_cpu_synchronize_post_init(CPUState *env)
 905 {
 906     kvm_arch_put_registers(env, KVM_PUT_FULL_STATE);
 907     env->kvm_vcpu_dirty = 0;
 908 }
 909
 910 int kvm_cpu_exec(CPUState *env)
 911 {
 912     struct kvm_run *run = env->kvm_run;
 913     int ret;
 914
 915     DPRINTF("kvm_cpu_exec()\n");
 916
 917     if (kvm_arch_process_irqchip_events(env)) {
 918         env->exit_request = 0;
 919         return EXCP_HLT;
 920     }
 921
 922     cpu_single_env = env;
 923
 924     do {
 925         if (env->kvm_vcpu_dirty) {
 926             kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE);
 927             env->kvm_vcpu_dirty = 0;
 928         }
 929
 930         kvm_arch_pre_run(env, run);
 931         if (env->exit_request) {
 932             DPRINTF("interrupt exit requested\n");
 933             /*
 934              * KVM requires us to reenter the kernel after IO exits to complete
 935              * instruction emulation. This self-signal will ensure that we
 936              * leave ASAP again.
 937              */
 938             qemu_cpu_kick_self();
 939         }
 940         cpu_single_env = NULL;
 941         qemu_mutex_unlock_iothread();
 942
 943         ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
 944
 945         qemu_mutex_lock_iothread();
 946         cpu_single_env = env;
 947         kvm_arch_post_run(env, run);
 948
 949         kvm_flush_coalesced_mmio_buffer();
 950
 951         if (ret == -EINTR || ret == -EAGAIN) {
 952             DPRINTF("io window exit\n");
 953             ret = 0;
 954             break;
 955         }
 956
 957         if (ret < 0) {
 958             DPRINTF("kvm run failed %s\n", strerror(-ret));
 959             abort();
 960         }
 961
 962         ret = 0; /* exit loop */
 963         switch (run->exit_reason) {
 964         case KVM_EXIT_IO:
 965             DPRINTF("handle_io\n");
 966             kvm_handle_io(run->io.port,
 967                           (uint8_t *)run + run->io.data_offset,
 968                           run->io.direction,
 969                           run->io.size,
 970                           run->io.count);
 971             ret = 1;
 972             break;
 973         case KVM_EXIT_MMIO:
 974             DPRINTF("handle_mmio\n");
 975             cpu_physical_memory_rw(run->mmio.phys_addr,
 976                                    run->mmio.data,
 977                                    run->mmio.len,
 978                                    run->mmio.is_write);
 979             ret = 1;
 980             break;
 981         case KVM_EXIT_IRQ_WINDOW_OPEN:
 982             DPRINTF("irq_window_open\n");
 983             break;
 984         case KVM_EXIT_SHUTDOWN:
 985             DPRINTF("shutdown\n");
 986             qemu_system_reset_request();
 987             break;
 988         case KVM_EXIT_UNKNOWN:
 989             fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
 990                     (uint64_t)run->hw.hardware_exit_reason);
 991             ret = -1;
 992             break;
 993 #ifdef KVM_CAP_INTERNAL_ERROR_DATA
 994         case KVM_EXIT_INTERNAL_ERROR:
 995             ret = kvm_handle_internal_error(env, run);
 996             break;
 997 #endif
 998         case KVM_EXIT_DEBUG:
 999             DPRINTF("kvm_exit_debug\n");
1000 #ifdef KVM_CAP_SET_GUEST_DEBUG
1001             if (kvm_arch_debug(&run->debug.arch)) {
1002                 ret = EXCP_DEBUG;
1003                 goto out;
1004             }
1005             /* re-enter, this exception was guest-internal */
1006             ret = 1;
1007 #endif /* KVM_CAP_SET_GUEST_DEBUG */
1008             break;
1009         default:
1010             DPRINTF("kvm_arch_handle_exit\n");
1011             ret = kvm_arch_handle_exit(env, run);
1012             break;
1013         }
1014     } while (ret > 0);
1015
1016     if (ret < 0) {
1017         cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
1018         vm_stop(VMSTOP_PANIC);
1019     }
1020     ret = EXCP_INTERRUPT;
1021
1022 out:
1023     env->exit_request = 0;
1024     cpu_single_env = NULL;
1025     return ret;
1026 }
1027
1028 #endif
1029 int kvm_ioctl(KVMState *s, int type, ...)
1030 {
1031     int ret;
1032     void *arg;
1033     va_list ap;
1034
1035     va_start(ap, type);
1036     arg = va_arg(ap, void *);
1037     va_end(ap);
1038
1039     ret = ioctl(s->fd, type, arg);
1040     if (ret == -1) {
1041         ret = -errno;
1042     }
1043     return ret;
1044 }
1045
1046 int kvm_vm_ioctl(KVMState *s, int type, ...)
1047 {
1048     int ret;
1049     void *arg;
1050     va_list ap;
1051
1052     va_start(ap, type);
1053     arg = va_arg(ap, void *);
1054     va_end(ap);
1055
1056     ret = ioctl(s->vmfd, type, arg);
1057     if (ret == -1) {
1058         ret = -errno;
1059     }
1060     return ret;
1061 }
1062
1063 int kvm_vcpu_ioctl(CPUState *env, int type, ...)
1064 {
1065     int ret;
1066     void *arg;
1067     va_list ap;
1068
1069     va_start(ap, type);
1070     arg = va_arg(ap, void *);
1071     va_end(ap);
1072
1073     ret = ioctl(env->kvm_fd, type, arg);
1074     if (ret == -1) {
1075         ret = -errno;
1076     }
1077     return ret;
1078 }
1079
1080 int kvm_has_sync_mmu(void)
1081 {
1082     return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
1083 }
1084
1085 int kvm_has_vcpu_events(void)
1086 {
1087     return kvm_state->vcpu_events;
1088 }
1089
1090 int kvm_has_robust_singlestep(void)
1091 {
1092     return kvm_state->robust_singlestep;
1093 }
1094
1095 int kvm_has_debugregs(void)
1096 {
1097     return kvm_state->debugregs;
1098 }
1099
1100 int kvm_has_xsave(void)
1101 {
1102     return kvm_state->xsave;
1103 }
1104
1105 int kvm_has_xcrs(void)
1106 {
1107     return kvm_state->xcrs;
1108 }
1109
1110 int kvm_has_many_ioeventfds(void)
1111 {
1112     if (!kvm_enabled()) {
1113         return 0;
1114     }
1115     return kvm_state->many_ioeventfds;
1116 }
1117
1118 void kvm_setup_guest_memory(void *start, size_t size)
1119 {
1120     if (!kvm_has_sync_mmu()) {
1121         int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
1122
1123         if (ret) {
1124             perror("qemu_madvise");
1125             fprintf(stderr,
1126                     "Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
1127             exit(1);
1128         }
1129     }
1130 }
1131
1132 #ifdef KVM_CAP_SET_GUEST_DEBUG
1133 #ifndef OBSOLETE_KVM_IMPL
1134 #define run_on_cpu on_vcpu
1135 #endif /* !OBSOLETE_KVM_IMPL */
1136
1137 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
1138                                                  target_ulong pc)
1139 {
1140     struct kvm_sw_breakpoint *bp;
1141
1142     QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) {
1143         if (bp->pc == pc) {
1144             return bp;
1145         }
1146     }
1147     return NULL;
1148 }
1149
1150 int kvm_sw_breakpoints_active(CPUState *env)
1151 {
1152     return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
1153 }
1154
1155 struct kvm_set_guest_debug_data {
1156     struct kvm_guest_debug dbg;
1157     CPUState *env;
1158     int err;
1159 };
1160
1161 static void kvm_invoke_set_guest_debug(void *data)
1162 {
1163     struct kvm_set_guest_debug_data *dbg_data = data;
1164     CPUState *env = dbg_data->env;
1165
1166     dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg);
1167 }
1168
1169 int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap)
1170 {
1171     struct kvm_set_guest_debug_data data;
1172
1173     data.dbg.control = reinject_trap;
1174
1175     if (env->singlestep_enabled) {
1176         data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
1177     }
1178     kvm_arch_update_guest_debug(env, &data.dbg);
1179     data.env = env;
1180
1181     run_on_cpu(env, kvm_invoke_set_guest_debug, &data);
1182     return data.err;
1183 }
1184
1185 int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
1186                           target_ulong len, int type)
1187 {
1188     struct kvm_sw_breakpoint *bp;
1189     CPUState *env;
1190     int err;
1191
1192     if (type == GDB_BREAKPOINT_SW) {
1193         bp = kvm_find_sw_breakpoint(current_env, addr);
1194         if (bp) {
1195             bp->use_count++;
1196             return 0;
1197         }
1198
1199         bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint));
1200         if (!bp) {
1201             return -ENOMEM;
1202         }
1203
1204         bp->pc = addr;
1205         bp->use_count = 1;
1206         err = kvm_arch_insert_sw_breakpoint(current_env, bp);
1207         if (err) {
1208             free(bp);
1209             return err;
1210         }
1211
1212         QTAILQ_INSERT_HEAD(&current_env->kvm_state->kvm_sw_breakpoints,
1213                           bp, entry);
1214     } else {
1215         err = kvm_arch_insert_hw_breakpoint(addr, len, type);
1216         if (err) {
1217             return err;
1218         }
1219     }
1220
1221     for (env = first_cpu; env != NULL; env = env->next_cpu) {
1222         err = kvm_update_guest_debug(env, 0);
1223         if (err) {
1224             return err;
1225         }
1226     }
1227     return 0;
1228 }
1229
1230 int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
1231                           target_ulong len, int type)
1232 {
1233     struct kvm_sw_breakpoint *bp;
1234     CPUState *env;
1235     int err;
1236
1237     if (type == GDB_BREAKPOINT_SW) {
1238         bp = kvm_find_sw_breakpoint(current_env, addr);
1239         if (!bp) {
1240             return -ENOENT;
1241         }
1242
1243         if (bp->use_count > 1) {
1244             bp->use_count--;
1245             return 0;
1246         }
1247
1248         err = kvm_arch_remove_sw_breakpoint(current_env, bp);
1249         if (err) {
1250             return err;
1251         }
1252
1253         QTAILQ_REMOVE(&current_env->kvm_state->kvm_sw_breakpoints, bp, entry);
1254         qemu_free(bp);
1255     } else {
1256         err = kvm_arch_remove_hw_breakpoint(addr, len, type);
1257         if (err) {
1258             return err;
1259         }
1260     }
1261
1262     for (env = first_cpu; env != NULL; env = env->next_cpu) {
1263         err = kvm_update_guest_debug(env, 0);
1264         if (err) {
1265             return err;
1266         }
1267     }
1268     return 0;
1269 }
1270
1271 void kvm_remove_all_breakpoints(CPUState *current_env)
1272 {
1273     struct kvm_sw_breakpoint *bp, *next;
1274     KVMState *s = current_env->kvm_state;
1275     CPUState *env;
1276
1277     QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
1278         if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) {
1279             /* Try harder to find a CPU that currently sees the breakpoint. */
1280             for (env = first_cpu; env != NULL; env = env->next_cpu) {
1281                 if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) {
1282                     break;
1283                 }
1284             }
1285         }
1286     }
1287     kvm_arch_remove_all_hw_breakpoints();
1288
1289     for (env = first_cpu; env != NULL; env = env->next_cpu) {
1290         kvm_update_guest_debug(env, 0);
1291     }
1292 }
1293
1294 #else /* !KVM_CAP_SET_GUEST_DEBUG */
1295
1296 int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap)
1297 {
1298     return -EINVAL;
1299 }
1300
1301 int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
1302                           target_ulong len, int type)
1303 {
1304     return -EINVAL;
1305 }
1306
1307 int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
1308                           target_ulong len, int type)
1309 {
1310     return -EINVAL;
1311 }
1312
1313 void kvm_remove_all_breakpoints(CPUState *current_env)
1314 {
1315 }
1316 #endif /* !KVM_CAP_SET_GUEST_DEBUG */
1317
1318 int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset)
1319 {
1320     struct kvm_signal_mask *sigmask;
1321     int r;
1322
1323     if (!sigset) {
1324         return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL);
1325     }
1326
1327     sigmask = qemu_malloc(sizeof(*sigmask) + sizeof(*sigset));
1328
1329     sigmask->len = 8;
1330     memcpy(sigmask->sigset, sigset, sizeof(*sigset));
1331     r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask);
1332     free(sigmask);
1333
1334     return r;
1335 }
1336
1337 int kvm_set_ioeventfd_mmio_long(int fd, uint32_t addr, uint32_t val, bool assign)
1338 {
1339 #ifdef KVM_IOEVENTFD
1340     int ret;
1341     struct kvm_ioeventfd iofd;
1342
1343     iofd.datamatch = val;
1344     iofd.addr = addr;
1345     iofd.len = 4;
1346     iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH;
1347     iofd.fd = fd;
1348
1349     if (!kvm_enabled()) {
1350         return -ENOSYS;
1351     }
1352
1353     if (!assign) {
1354         iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
1355     }
1356
1357     ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd);
1358
1359     if (ret < 0) {
1360         return -errno;
1361     }
1362
1363     return 0;
1364 #else
1365     return -ENOSYS;
1366 #endif
1367 }
1368
1369 int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign)
1370 {
1371 #ifdef KVM_IOEVENTFD
1372     struct kvm_ioeventfd kick = {
1373         .datamatch = val,
1374         .addr = addr,
1375         .len = 2,
1376         .flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO,
1377         .fd = fd,
1378     };
1379     int r;
1380     if (!kvm_enabled()) {
1381         return -ENOSYS;
1382     }
1383     if (!assign) {
1384         kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
1385     }
1386     r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
1387     if (r < 0) {
1388         return r;
1389     }
1390     return 0;
1391 #else
1392     return -ENOSYS;
1393 #endif
1394 }
1395
1396 #if defined(KVM_IRQFD)
1397 int kvm_set_irqfd(int gsi, int fd, bool assigned)
1398 {
1399     struct kvm_irqfd irqfd = {
1400         .fd = fd,
1401         .gsi = gsi,
1402         .flags = assigned ? 0 : KVM_IRQFD_FLAG_DEASSIGN,
1403     };
1404     int r;
1405     if (!kvm_enabled() || !kvm_irqchip_in_kernel())
1406         return -ENOSYS;
1407
1408     r = kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd);
1409     if (r < 0)
1410         return r;
1411     return 0;
1412 }
1413 #endif
1414
1415 int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
1416 {
1417     return kvm_arch_on_sigbus_vcpu(env, code, addr);
1418 }
1419
1420 int kvm_on_sigbus(int code, void *addr)
1421 {
1422     return kvm_arch_on_sigbus(code, addr);
1423 }
1424
1425 #undef PAGE_SIZE
1426 #include "qemu-kvm.c"