1 /* 2 * Copyright (C) 2010 Citrix Ltd. 3 * 4 * This work is licensed under the terms of the GNU GPL, version 2. See 5 * the COPYING file in the top-level directory. 6 * 7 * Contributions after 2012-01-13 are licensed under the terms of the 8 * GNU GPL, version 2 or (at your option) any later version. 9 */ 10 11 #include "qemu/osdep.h" 12 13 #include "cpu.h" 14 #include "hw/pci/pci.h" 15 #include "hw/pci/pci_host.h" 16 #include "hw/i386/pc.h" 17 #include "hw/i386/apic-msidef.h" 18 #include "hw/xen/xen_common.h" 19 #include "hw/xen/xen_backend.h" 20 #include "qapi/error.h" 21 #include "qapi/qapi-commands-misc.h" 22 #include "qemu/error-report.h" 23 #include "qemu/range.h" 24 #include "sysemu/xen-mapcache.h" 25 #include "trace.h" 26 #include "exec/address-spaces.h" 27 28 #include <xen/hvm/ioreq.h> 29 #include <xen/hvm/params.h> 30 #include <xen/hvm/e820.h> 31 32 //#define DEBUG_XEN_HVM 33 34 #ifdef DEBUG_XEN_HVM 35 #define DPRINTF(fmt, ...) \ 36 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0) 37 #else 38 #define DPRINTF(fmt, ...) \ 39 do { } while (0) 40 #endif 41 42 static MemoryRegion ram_memory, ram_640k, ram_lo, ram_hi; 43 static MemoryRegion *framebuffer; 44 static bool xen_in_migration; 45 46 /* Compatibility with older version */ 47 48 /* This allows QEMU to build on a system that has Xen 4.5 or earlier 49 * installed. This here (not in hw/xen/xen_common.h) because xen/hvm/ioreq.h 50 * needs to be included before this block and hw/xen/xen_common.h needs to 51 * be included before xen/hvm/ioreq.h 52 */ 53 #ifndef IOREQ_TYPE_VMWARE_PORT 54 #define IOREQ_TYPE_VMWARE_PORT 3 55 struct vmware_regs { 56 uint32_t esi; 57 uint32_t edi; 58 uint32_t ebx; 59 uint32_t ecx; 60 uint32_t edx; 61 }; 62 typedef struct vmware_regs vmware_regs_t; 63 64 struct shared_vmport_iopage { 65 struct vmware_regs vcpu_vmport_regs[1]; 66 }; 67 typedef struct shared_vmport_iopage shared_vmport_iopage_t; 68 #endif 69 70 static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i) 71 { 72 return shared_page->vcpu_ioreq[i].vp_eport; 73 } 74 static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu) 75 { 76 return &shared_page->vcpu_ioreq[vcpu]; 77 } 78 79 #define BUFFER_IO_MAX_DELAY 100 80 81 typedef struct XenPhysmap { 82 hwaddr start_addr; 83 ram_addr_t size; 84 const char *name; 85 hwaddr phys_offset; 86 87 QLIST_ENTRY(XenPhysmap) list; 88 } XenPhysmap; 89 90 static QLIST_HEAD(, XenPhysmap) xen_physmap; 91 92 typedef struct XenPciDevice { 93 PCIDevice *pci_dev; 94 uint32_t sbdf; 95 QLIST_ENTRY(XenPciDevice) entry; 96 } XenPciDevice; 97 98 typedef struct XenIOState { 99 ioservid_t ioservid; 100 shared_iopage_t *shared_page; 101 shared_vmport_iopage_t *shared_vmport_page; 102 buffered_iopage_t *buffered_io_page; 103 QEMUTimer *buffered_io_timer; 104 CPUState **cpu_by_vcpu_id; 105 /* the evtchn port for polling the notification, */ 106 evtchn_port_t *ioreq_local_port; 107 /* evtchn remote and local ports for buffered io */ 108 evtchn_port_t bufioreq_remote_port; 109 evtchn_port_t bufioreq_local_port; 110 /* the evtchn fd for polling */ 111 xenevtchn_handle *xce_handle; 112 /* which vcpu we are serving */ 113 int send_vcpu; 114 115 struct xs_handle *xenstore; 116 MemoryListener memory_listener; 117 MemoryListener io_listener; 118 QLIST_HEAD(, XenPciDevice) dev_list; 119 DeviceListener device_listener; 120 hwaddr free_phys_offset; 121 const XenPhysmap *log_for_dirtybit; 122 123 Notifier exit; 124 Notifier suspend; 125 Notifier wakeup; 126 } XenIOState; 127 128 /* Xen specific function for piix pci */ 129 130 int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num) 131 { 132 return irq_num + ((pci_dev->devfn >> 3) << 2); 133 } 134 135 void xen_piix3_set_irq(void *opaque, int irq_num, int level) 136 { 137 xen_set_pci_intx_level(xen_domid, 0, 0, irq_num >> 2, 138 irq_num & 3, level); 139 } 140 141 void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len) 142 { 143 int i; 144 145 /* Scan for updates to PCI link routes (0x60-0x63). */ 146 for (i = 0; i < len; i++) { 147 uint8_t v = (val >> (8 * i)) & 0xff; 148 if (v & 0x80) { 149 v = 0; 150 } 151 v &= 0xf; 152 if (((address + i) >= 0x60) && ((address + i) <= 0x63)) { 153 xen_set_pci_link_route(xen_domid, address + i - 0x60, v); 154 } 155 } 156 } 157 158 int xen_is_pirq_msi(uint32_t msi_data) 159 { 160 /* If vector is 0, the msi is remapped into a pirq, passed as 161 * dest_id. 162 */ 163 return ((msi_data & MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT) == 0; 164 } 165 166 void xen_hvm_inject_msi(uint64_t addr, uint32_t data) 167 { 168 xen_inject_msi(xen_domid, addr, data); 169 } 170 171 static void xen_suspend_notifier(Notifier *notifier, void *data) 172 { 173 xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 3); 174 } 175 176 /* Xen Interrupt Controller */ 177 178 static void xen_set_irq(void *opaque, int irq, int level) 179 { 180 xen_set_isa_irq_level(xen_domid, irq, level); 181 } 182 183 qemu_irq *xen_interrupt_controller_init(void) 184 { 185 return qemu_allocate_irqs(xen_set_irq, NULL, 16); 186 } 187 188 /* Memory Ops */ 189 190 static void xen_ram_init(PCMachineState *pcms, 191 ram_addr_t ram_size, MemoryRegion **ram_memory_p) 192 { 193 MemoryRegion *sysmem = get_system_memory(); 194 ram_addr_t block_len; 195 uint64_t user_lowmem = object_property_get_uint(qdev_get_machine(), 196 PC_MACHINE_MAX_RAM_BELOW_4G, 197 &error_abort); 198 199 /* Handle the machine opt max-ram-below-4g. It is basically doing 200 * min(xen limit, user limit). 201 */ 202 if (!user_lowmem) { 203 user_lowmem = HVM_BELOW_4G_RAM_END; /* default */ 204 } 205 if (HVM_BELOW_4G_RAM_END <= user_lowmem) { 206 user_lowmem = HVM_BELOW_4G_RAM_END; 207 } 208 209 if (ram_size >= user_lowmem) { 210 pcms->above_4g_mem_size = ram_size - user_lowmem; 211 pcms->below_4g_mem_size = user_lowmem; 212 } else { 213 pcms->above_4g_mem_size = 0; 214 pcms->below_4g_mem_size = ram_size; 215 } 216 if (!pcms->above_4g_mem_size) { 217 block_len = ram_size; 218 } else { 219 /* 220 * Xen does not allocate the memory continuously, it keeps a 221 * hole of the size computed above or passed in. 222 */ 223 block_len = (1ULL << 32) + pcms->above_4g_mem_size; 224 } 225 memory_region_init_ram(&ram_memory, NULL, "xen.ram", block_len, 226 &error_fatal); 227 *ram_memory_p = &ram_memory; 228 229 memory_region_init_alias(&ram_640k, NULL, "xen.ram.640k", 230 &ram_memory, 0, 0xa0000); 231 memory_region_add_subregion(sysmem, 0, &ram_640k); 232 /* Skip of the VGA IO memory space, it will be registered later by the VGA 233 * emulated device. 234 * 235 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load 236 * the Options ROM, so it is registered here as RAM. 237 */ 238 memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo", 239 &ram_memory, 0xc0000, 240 pcms->below_4g_mem_size - 0xc0000); 241 memory_region_add_subregion(sysmem, 0xc0000, &ram_lo); 242 if (pcms->above_4g_mem_size > 0) { 243 memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi", 244 &ram_memory, 0x100000000ULL, 245 pcms->above_4g_mem_size); 246 memory_region_add_subregion(sysmem, 0x100000000ULL, &ram_hi); 247 } 248 } 249 250 void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr, 251 Error **errp) 252 { 253 unsigned long nr_pfn; 254 xen_pfn_t *pfn_list; 255 int i; 256 257 if (runstate_check(RUN_STATE_INMIGRATE)) { 258 /* RAM already populated in Xen */ 259 fprintf(stderr, "%s: do not alloc "RAM_ADDR_FMT 260 " bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE\n", 261 __func__, size, ram_addr); 262 return; 263 } 264 265 if (mr == &ram_memory) { 266 return; 267 } 268 269 trace_xen_ram_alloc(ram_addr, size); 270 271 nr_pfn = size >> TARGET_PAGE_BITS; 272 pfn_list = g_malloc(sizeof (*pfn_list) * nr_pfn); 273 274 for (i = 0; i < nr_pfn; i++) { 275 pfn_list[i] = (ram_addr >> TARGET_PAGE_BITS) + i; 276 } 277 278 if (xc_domain_populate_physmap_exact(xen_xc, xen_domid, nr_pfn, 0, 0, pfn_list)) { 279 error_setg(errp, "xen: failed to populate ram at " RAM_ADDR_FMT, 280 ram_addr); 281 } 282 283 g_free(pfn_list); 284 } 285 286 static XenPhysmap *get_physmapping(hwaddr start_addr, ram_addr_t size) 287 { 288 XenPhysmap *physmap = NULL; 289 290 start_addr &= TARGET_PAGE_MASK; 291 292 QLIST_FOREACH(physmap, &xen_physmap, list) { 293 if (range_covers_byte(physmap->start_addr, physmap->size, start_addr)) { 294 return physmap; 295 } 296 } 297 return NULL; 298 } 299 300 static hwaddr xen_phys_offset_to_gaddr(hwaddr phys_offset, ram_addr_t size) 301 { 302 hwaddr addr = phys_offset & TARGET_PAGE_MASK; 303 XenPhysmap *physmap = NULL; 304 305 QLIST_FOREACH(physmap, &xen_physmap, list) { 306 if (range_covers_byte(physmap->phys_offset, physmap->size, addr)) { 307 return physmap->start_addr + (phys_offset - physmap->phys_offset); 308 } 309 } 310 311 return phys_offset; 312 } 313 314 #ifdef XEN_COMPAT_PHYSMAP 315 static int xen_save_physmap(XenIOState *state, XenPhysmap *physmap) 316 { 317 char path[80], value[17]; 318 319 snprintf(path, sizeof(path), 320 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/start_addr", 321 xen_domid, (uint64_t)physmap->phys_offset); 322 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)physmap->start_addr); 323 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) { 324 return -1; 325 } 326 snprintf(path, sizeof(path), 327 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/size", 328 xen_domid, (uint64_t)physmap->phys_offset); 329 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)physmap->size); 330 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) { 331 return -1; 332 } 333 if (physmap->name) { 334 snprintf(path, sizeof(path), 335 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/name", 336 xen_domid, (uint64_t)physmap->phys_offset); 337 if (!xs_write(state->xenstore, 0, path, 338 physmap->name, strlen(physmap->name))) { 339 return -1; 340 } 341 } 342 return 0; 343 } 344 #else 345 static int xen_save_physmap(XenIOState *state, XenPhysmap *physmap) 346 { 347 return 0; 348 } 349 #endif 350 351 static int xen_add_to_physmap(XenIOState *state, 352 hwaddr start_addr, 353 ram_addr_t size, 354 MemoryRegion *mr, 355 hwaddr offset_within_region) 356 { 357 unsigned long nr_pages; 358 int rc = 0; 359 XenPhysmap *physmap = NULL; 360 hwaddr pfn, start_gpfn; 361 hwaddr phys_offset = memory_region_get_ram_addr(mr); 362 const char *mr_name; 363 364 if (get_physmapping(start_addr, size)) { 365 return 0; 366 } 367 if (size <= 0) { 368 return -1; 369 } 370 371 /* Xen can only handle a single dirty log region for now and we want 372 * the linear framebuffer to be that region. 373 * Avoid tracking any regions that is not videoram and avoid tracking 374 * the legacy vga region. */ 375 if (mr == framebuffer && start_addr > 0xbffff) { 376 goto go_physmap; 377 } 378 return -1; 379 380 go_physmap: 381 DPRINTF("mapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx"\n", 382 start_addr, start_addr + size); 383 384 mr_name = memory_region_name(mr); 385 386 physmap = g_malloc(sizeof(XenPhysmap)); 387 388 physmap->start_addr = start_addr; 389 physmap->size = size; 390 physmap->name = mr_name; 391 physmap->phys_offset = phys_offset; 392 393 QLIST_INSERT_HEAD(&xen_physmap, physmap, list); 394 395 if (runstate_check(RUN_STATE_INMIGRATE)) { 396 /* Now when we have a physmap entry we can replace a dummy mapping with 397 * a real one of guest foreign memory. */ 398 uint8_t *p = xen_replace_cache_entry(phys_offset, start_addr, size); 399 assert(p && p == memory_region_get_ram_ptr(mr)); 400 401 return 0; 402 } 403 404 pfn = phys_offset >> TARGET_PAGE_BITS; 405 start_gpfn = start_addr >> TARGET_PAGE_BITS; 406 nr_pages = size >> TARGET_PAGE_BITS; 407 rc = xendevicemodel_relocate_memory(xen_dmod, xen_domid, nr_pages, pfn, 408 start_gpfn); 409 if (rc) { 410 int saved_errno = errno; 411 412 error_report("relocate_memory %lu pages from GFN %"HWADDR_PRIx 413 " to GFN %"HWADDR_PRIx" failed: %s", 414 nr_pages, pfn, start_gpfn, strerror(saved_errno)); 415 errno = saved_errno; 416 return -1; 417 } 418 419 rc = xendevicemodel_pin_memory_cacheattr(xen_dmod, xen_domid, 420 start_addr >> TARGET_PAGE_BITS, 421 (start_addr + size - 1) >> TARGET_PAGE_BITS, 422 XEN_DOMCTL_MEM_CACHEATTR_WB); 423 if (rc) { 424 error_report("pin_memory_cacheattr failed: %s", strerror(errno)); 425 } 426 return xen_save_physmap(state, physmap); 427 } 428 429 static int xen_remove_from_physmap(XenIOState *state, 430 hwaddr start_addr, 431 ram_addr_t size) 432 { 433 int rc = 0; 434 XenPhysmap *physmap = NULL; 435 hwaddr phys_offset = 0; 436 437 physmap = get_physmapping(start_addr, size); 438 if (physmap == NULL) { 439 return -1; 440 } 441 442 phys_offset = physmap->phys_offset; 443 size = physmap->size; 444 445 DPRINTF("unmapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx", at " 446 "%"HWADDR_PRIx"\n", start_addr, start_addr + size, phys_offset); 447 448 size >>= TARGET_PAGE_BITS; 449 start_addr >>= TARGET_PAGE_BITS; 450 phys_offset >>= TARGET_PAGE_BITS; 451 rc = xendevicemodel_relocate_memory(xen_dmod, xen_domid, size, start_addr, 452 phys_offset); 453 if (rc) { 454 int saved_errno = errno; 455 456 error_report("relocate_memory "RAM_ADDR_FMT" pages" 457 " from GFN %"HWADDR_PRIx 458 " to GFN %"HWADDR_PRIx" failed: %s", 459 size, start_addr, phys_offset, strerror(saved_errno)); 460 errno = saved_errno; 461 return -1; 462 } 463 464 QLIST_REMOVE(physmap, list); 465 if (state->log_for_dirtybit == physmap) { 466 state->log_for_dirtybit = NULL; 467 } 468 g_free(physmap); 469 470 return 0; 471 } 472 473 static void xen_set_memory(struct MemoryListener *listener, 474 MemoryRegionSection *section, 475 bool add) 476 { 477 XenIOState *state = container_of(listener, XenIOState, memory_listener); 478 hwaddr start_addr = section->offset_within_address_space; 479 ram_addr_t size = int128_get64(section->size); 480 bool log_dirty = memory_region_is_logging(section->mr, DIRTY_MEMORY_VGA); 481 hvmmem_type_t mem_type; 482 483 if (section->mr == &ram_memory) { 484 return; 485 } else { 486 if (add) { 487 xen_map_memory_section(xen_domid, state->ioservid, 488 section); 489 } else { 490 xen_unmap_memory_section(xen_domid, state->ioservid, 491 section); 492 } 493 } 494 495 if (!memory_region_is_ram(section->mr)) { 496 return; 497 } 498 499 if (log_dirty != add) { 500 return; 501 } 502 503 trace_xen_client_set_memory(start_addr, size, log_dirty); 504 505 start_addr &= TARGET_PAGE_MASK; 506 size = TARGET_PAGE_ALIGN(size); 507 508 if (add) { 509 if (!memory_region_is_rom(section->mr)) { 510 xen_add_to_physmap(state, start_addr, size, 511 section->mr, section->offset_within_region); 512 } else { 513 mem_type = HVMMEM_ram_ro; 514 if (xen_set_mem_type(xen_domid, mem_type, 515 start_addr >> TARGET_PAGE_BITS, 516 size >> TARGET_PAGE_BITS)) { 517 DPRINTF("xen_set_mem_type error, addr: "TARGET_FMT_plx"\n", 518 start_addr); 519 } 520 } 521 } else { 522 if (xen_remove_from_physmap(state, start_addr, size) < 0) { 523 DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr); 524 } 525 } 526 } 527 528 static void xen_region_add(MemoryListener *listener, 529 MemoryRegionSection *section) 530 { 531 memory_region_ref(section->mr); 532 xen_set_memory(listener, section, true); 533 } 534 535 static void xen_region_del(MemoryListener *listener, 536 MemoryRegionSection *section) 537 { 538 xen_set_memory(listener, section, false); 539 memory_region_unref(section->mr); 540 } 541 542 static void xen_io_add(MemoryListener *listener, 543 MemoryRegionSection *section) 544 { 545 XenIOState *state = container_of(listener, XenIOState, io_listener); 546 MemoryRegion *mr = section->mr; 547 548 if (mr->ops == &unassigned_io_ops) { 549 return; 550 } 551 552 memory_region_ref(mr); 553 554 xen_map_io_section(xen_domid, state->ioservid, section); 555 } 556 557 static void xen_io_del(MemoryListener *listener, 558 MemoryRegionSection *section) 559 { 560 XenIOState *state = container_of(listener, XenIOState, io_listener); 561 MemoryRegion *mr = section->mr; 562 563 if (mr->ops == &unassigned_io_ops) { 564 return; 565 } 566 567 xen_unmap_io_section(xen_domid, state->ioservid, section); 568 569 memory_region_unref(mr); 570 } 571 572 static void xen_device_realize(DeviceListener *listener, 573 DeviceState *dev) 574 { 575 XenIOState *state = container_of(listener, XenIOState, device_listener); 576 577 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 578 PCIDevice *pci_dev = PCI_DEVICE(dev); 579 XenPciDevice *xendev = g_new(XenPciDevice, 1); 580 581 xendev->pci_dev = pci_dev; 582 xendev->sbdf = PCI_BUILD_BDF(pci_dev_bus_num(pci_dev), 583 pci_dev->devfn); 584 QLIST_INSERT_HEAD(&state->dev_list, xendev, entry); 585 586 xen_map_pcidev(xen_domid, state->ioservid, pci_dev); 587 } 588 } 589 590 static void xen_device_unrealize(DeviceListener *listener, 591 DeviceState *dev) 592 { 593 XenIOState *state = container_of(listener, XenIOState, device_listener); 594 595 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 596 PCIDevice *pci_dev = PCI_DEVICE(dev); 597 XenPciDevice *xendev, *next; 598 599 xen_unmap_pcidev(xen_domid, state->ioservid, pci_dev); 600 601 QLIST_FOREACH_SAFE(xendev, &state->dev_list, entry, next) { 602 if (xendev->pci_dev == pci_dev) { 603 QLIST_REMOVE(xendev, entry); 604 g_free(xendev); 605 break; 606 } 607 } 608 } 609 } 610 611 static void xen_sync_dirty_bitmap(XenIOState *state, 612 hwaddr start_addr, 613 ram_addr_t size) 614 { 615 hwaddr npages = size >> TARGET_PAGE_BITS; 616 const int width = sizeof(unsigned long) * 8; 617 unsigned long bitmap[DIV_ROUND_UP(npages, width)]; 618 int rc, i, j; 619 const XenPhysmap *physmap = NULL; 620 621 physmap = get_physmapping(start_addr, size); 622 if (physmap == NULL) { 623 /* not handled */ 624 return; 625 } 626 627 if (state->log_for_dirtybit == NULL) { 628 state->log_for_dirtybit = physmap; 629 } else if (state->log_for_dirtybit != physmap) { 630 /* Only one range for dirty bitmap can be tracked. */ 631 return; 632 } 633 634 rc = xen_track_dirty_vram(xen_domid, start_addr >> TARGET_PAGE_BITS, 635 npages, bitmap); 636 if (rc < 0) { 637 #ifndef ENODATA 638 #define ENODATA ENOENT 639 #endif 640 if (errno == ENODATA) { 641 memory_region_set_dirty(framebuffer, 0, size); 642 DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx 643 ", 0x" TARGET_FMT_plx "): %s\n", 644 start_addr, start_addr + size, strerror(errno)); 645 } 646 return; 647 } 648 649 for (i = 0; i < ARRAY_SIZE(bitmap); i++) { 650 unsigned long map = bitmap[i]; 651 while (map != 0) { 652 j = ctzl(map); 653 map &= ~(1ul << j); 654 memory_region_set_dirty(framebuffer, 655 (i * width + j) * TARGET_PAGE_SIZE, 656 TARGET_PAGE_SIZE); 657 }; 658 } 659 } 660 661 static void xen_log_start(MemoryListener *listener, 662 MemoryRegionSection *section, 663 int old, int new) 664 { 665 XenIOState *state = container_of(listener, XenIOState, memory_listener); 666 667 if (new & ~old & (1 << DIRTY_MEMORY_VGA)) { 668 xen_sync_dirty_bitmap(state, section->offset_within_address_space, 669 int128_get64(section->size)); 670 } 671 } 672 673 static void xen_log_stop(MemoryListener *listener, MemoryRegionSection *section, 674 int old, int new) 675 { 676 XenIOState *state = container_of(listener, XenIOState, memory_listener); 677 678 if (old & ~new & (1 << DIRTY_MEMORY_VGA)) { 679 state->log_for_dirtybit = NULL; 680 /* Disable dirty bit tracking */ 681 xen_track_dirty_vram(xen_domid, 0, 0, NULL); 682 } 683 } 684 685 static void xen_log_sync(MemoryListener *listener, MemoryRegionSection *section) 686 { 687 XenIOState *state = container_of(listener, XenIOState, memory_listener); 688 689 xen_sync_dirty_bitmap(state, section->offset_within_address_space, 690 int128_get64(section->size)); 691 } 692 693 static void xen_log_global_start(MemoryListener *listener) 694 { 695 if (xen_enabled()) { 696 xen_in_migration = true; 697 } 698 } 699 700 static void xen_log_global_stop(MemoryListener *listener) 701 { 702 xen_in_migration = false; 703 } 704 705 static MemoryListener xen_memory_listener = { 706 .region_add = xen_region_add, 707 .region_del = xen_region_del, 708 .log_start = xen_log_start, 709 .log_stop = xen_log_stop, 710 .log_sync = xen_log_sync, 711 .log_global_start = xen_log_global_start, 712 .log_global_stop = xen_log_global_stop, 713 .priority = 10, 714 }; 715 716 static MemoryListener xen_io_listener = { 717 .region_add = xen_io_add, 718 .region_del = xen_io_del, 719 .priority = 10, 720 }; 721 722 static DeviceListener xen_device_listener = { 723 .realize = xen_device_realize, 724 .unrealize = xen_device_unrealize, 725 }; 726 727 /* get the ioreq packets from share mem */ 728 static ioreq_t *cpu_get_ioreq_from_shared_memory(XenIOState *state, int vcpu) 729 { 730 ioreq_t *req = xen_vcpu_ioreq(state->shared_page, vcpu); 731 732 if (req->state != STATE_IOREQ_READY) { 733 DPRINTF("I/O request not ready: " 734 "%x, ptr: %x, port: %"PRIx64", " 735 "data: %"PRIx64", count: %u, size: %u\n", 736 req->state, req->data_is_ptr, req->addr, 737 req->data, req->count, req->size); 738 return NULL; 739 } 740 741 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */ 742 743 req->state = STATE_IOREQ_INPROCESS; 744 return req; 745 } 746 747 /* use poll to get the port notification */ 748 /* ioreq_vec--out,the */ 749 /* retval--the number of ioreq packet */ 750 static ioreq_t *cpu_get_ioreq(XenIOState *state) 751 { 752 int i; 753 evtchn_port_t port; 754 755 port = xenevtchn_pending(state->xce_handle); 756 if (port == state->bufioreq_local_port) { 757 timer_mod(state->buffered_io_timer, 758 BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); 759 return NULL; 760 } 761 762 if (port != -1) { 763 for (i = 0; i < max_cpus; i++) { 764 if (state->ioreq_local_port[i] == port) { 765 break; 766 } 767 } 768 769 if (i == max_cpus) { 770 hw_error("Fatal error while trying to get io event!\n"); 771 } 772 773 /* unmask the wanted port again */ 774 xenevtchn_unmask(state->xce_handle, port); 775 776 /* get the io packet from shared memory */ 777 state->send_vcpu = i; 778 return cpu_get_ioreq_from_shared_memory(state, i); 779 } 780 781 /* read error or read nothing */ 782 return NULL; 783 } 784 785 static uint32_t do_inp(uint32_t addr, unsigned long size) 786 { 787 switch (size) { 788 case 1: 789 return cpu_inb(addr); 790 case 2: 791 return cpu_inw(addr); 792 case 4: 793 return cpu_inl(addr); 794 default: 795 hw_error("inp: bad size: %04x %lx", addr, size); 796 } 797 } 798 799 static void do_outp(uint32_t addr, 800 unsigned long size, uint32_t val) 801 { 802 switch (size) { 803 case 1: 804 return cpu_outb(addr, val); 805 case 2: 806 return cpu_outw(addr, val); 807 case 4: 808 return cpu_outl(addr, val); 809 default: 810 hw_error("outp: bad size: %04x %lx", addr, size); 811 } 812 } 813 814 /* 815 * Helper functions which read/write an object from/to physical guest 816 * memory, as part of the implementation of an ioreq. 817 * 818 * Equivalent to 819 * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i, 820 * val, req->size, 0/1) 821 * except without the integer overflow problems. 822 */ 823 static void rw_phys_req_item(hwaddr addr, 824 ioreq_t *req, uint32_t i, void *val, int rw) 825 { 826 /* Do everything unsigned so overflow just results in a truncated result 827 * and accesses to undesired parts of guest memory, which is up 828 * to the guest */ 829 hwaddr offset = (hwaddr)req->size * i; 830 if (req->df) { 831 addr -= offset; 832 } else { 833 addr += offset; 834 } 835 cpu_physical_memory_rw(addr, val, req->size, rw); 836 } 837 838 static inline void read_phys_req_item(hwaddr addr, 839 ioreq_t *req, uint32_t i, void *val) 840 { 841 rw_phys_req_item(addr, req, i, val, 0); 842 } 843 static inline void write_phys_req_item(hwaddr addr, 844 ioreq_t *req, uint32_t i, void *val) 845 { 846 rw_phys_req_item(addr, req, i, val, 1); 847 } 848 849 850 static void cpu_ioreq_pio(ioreq_t *req) 851 { 852 uint32_t i; 853 854 trace_cpu_ioreq_pio(req, req->dir, req->df, req->data_is_ptr, req->addr, 855 req->data, req->count, req->size); 856 857 if (req->size > sizeof(uint32_t)) { 858 hw_error("PIO: bad size (%u)", req->size); 859 } 860 861 if (req->dir == IOREQ_READ) { 862 if (!req->data_is_ptr) { 863 req->data = do_inp(req->addr, req->size); 864 trace_cpu_ioreq_pio_read_reg(req, req->data, req->addr, 865 req->size); 866 } else { 867 uint32_t tmp; 868 869 for (i = 0; i < req->count; i++) { 870 tmp = do_inp(req->addr, req->size); 871 write_phys_req_item(req->data, req, i, &tmp); 872 } 873 } 874 } else if (req->dir == IOREQ_WRITE) { 875 if (!req->data_is_ptr) { 876 trace_cpu_ioreq_pio_write_reg(req, req->data, req->addr, 877 req->size); 878 do_outp(req->addr, req->size, req->data); 879 } else { 880 for (i = 0; i < req->count; i++) { 881 uint32_t tmp = 0; 882 883 read_phys_req_item(req->data, req, i, &tmp); 884 do_outp(req->addr, req->size, tmp); 885 } 886 } 887 } 888 } 889 890 static void cpu_ioreq_move(ioreq_t *req) 891 { 892 uint32_t i; 893 894 trace_cpu_ioreq_move(req, req->dir, req->df, req->data_is_ptr, req->addr, 895 req->data, req->count, req->size); 896 897 if (req->size > sizeof(req->data)) { 898 hw_error("MMIO: bad size (%u)", req->size); 899 } 900 901 if (!req->data_is_ptr) { 902 if (req->dir == IOREQ_READ) { 903 for (i = 0; i < req->count; i++) { 904 read_phys_req_item(req->addr, req, i, &req->data); 905 } 906 } else if (req->dir == IOREQ_WRITE) { 907 for (i = 0; i < req->count; i++) { 908 write_phys_req_item(req->addr, req, i, &req->data); 909 } 910 } 911 } else { 912 uint64_t tmp; 913 914 if (req->dir == IOREQ_READ) { 915 for (i = 0; i < req->count; i++) { 916 read_phys_req_item(req->addr, req, i, &tmp); 917 write_phys_req_item(req->data, req, i, &tmp); 918 } 919 } else if (req->dir == IOREQ_WRITE) { 920 for (i = 0; i < req->count; i++) { 921 read_phys_req_item(req->data, req, i, &tmp); 922 write_phys_req_item(req->addr, req, i, &tmp); 923 } 924 } 925 } 926 } 927 928 static void cpu_ioreq_config(XenIOState *state, ioreq_t *req) 929 { 930 uint32_t sbdf = req->addr >> 32; 931 uint32_t reg = req->addr; 932 XenPciDevice *xendev; 933 934 if (req->size != sizeof(uint8_t) && req->size != sizeof(uint16_t) && 935 req->size != sizeof(uint32_t)) { 936 hw_error("PCI config access: bad size (%u)", req->size); 937 } 938 939 if (req->count != 1) { 940 hw_error("PCI config access: bad count (%u)", req->count); 941 } 942 943 QLIST_FOREACH(xendev, &state->dev_list, entry) { 944 if (xendev->sbdf != sbdf) { 945 continue; 946 } 947 948 if (!req->data_is_ptr) { 949 if (req->dir == IOREQ_READ) { 950 req->data = pci_host_config_read_common( 951 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 952 req->size); 953 trace_cpu_ioreq_config_read(req, xendev->sbdf, reg, 954 req->size, req->data); 955 } else if (req->dir == IOREQ_WRITE) { 956 trace_cpu_ioreq_config_write(req, xendev->sbdf, reg, 957 req->size, req->data); 958 pci_host_config_write_common( 959 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 960 req->data, req->size); 961 } 962 } else { 963 uint32_t tmp; 964 965 if (req->dir == IOREQ_READ) { 966 tmp = pci_host_config_read_common( 967 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 968 req->size); 969 trace_cpu_ioreq_config_read(req, xendev->sbdf, reg, 970 req->size, tmp); 971 write_phys_req_item(req->data, req, 0, &tmp); 972 } else if (req->dir == IOREQ_WRITE) { 973 read_phys_req_item(req->data, req, 0, &tmp); 974 trace_cpu_ioreq_config_write(req, xendev->sbdf, reg, 975 req->size, tmp); 976 pci_host_config_write_common( 977 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 978 tmp, req->size); 979 } 980 } 981 } 982 } 983 984 static void regs_to_cpu(vmware_regs_t *vmport_regs, ioreq_t *req) 985 { 986 X86CPU *cpu; 987 CPUX86State *env; 988 989 cpu = X86_CPU(current_cpu); 990 env = &cpu->env; 991 env->regs[R_EAX] = req->data; 992 env->regs[R_EBX] = vmport_regs->ebx; 993 env->regs[R_ECX] = vmport_regs->ecx; 994 env->regs[R_EDX] = vmport_regs->edx; 995 env->regs[R_ESI] = vmport_regs->esi; 996 env->regs[R_EDI] = vmport_regs->edi; 997 } 998 999 static void regs_from_cpu(vmware_regs_t *vmport_regs) 1000 { 1001 X86CPU *cpu = X86_CPU(current_cpu); 1002 CPUX86State *env = &cpu->env; 1003 1004 vmport_regs->ebx = env->regs[R_EBX]; 1005 vmport_regs->ecx = env->regs[R_ECX]; 1006 vmport_regs->edx = env->regs[R_EDX]; 1007 vmport_regs->esi = env->regs[R_ESI]; 1008 vmport_regs->edi = env->regs[R_EDI]; 1009 } 1010 1011 static void handle_vmport_ioreq(XenIOState *state, ioreq_t *req) 1012 { 1013 vmware_regs_t *vmport_regs; 1014 1015 assert(state->shared_vmport_page); 1016 vmport_regs = 1017 &state->shared_vmport_page->vcpu_vmport_regs[state->send_vcpu]; 1018 QEMU_BUILD_BUG_ON(sizeof(*req) < sizeof(*vmport_regs)); 1019 1020 current_cpu = state->cpu_by_vcpu_id[state->send_vcpu]; 1021 regs_to_cpu(vmport_regs, req); 1022 cpu_ioreq_pio(req); 1023 regs_from_cpu(vmport_regs); 1024 current_cpu = NULL; 1025 } 1026 1027 static void handle_ioreq(XenIOState *state, ioreq_t *req) 1028 { 1029 trace_handle_ioreq(req, req->type, req->dir, req->df, req->data_is_ptr, 1030 req->addr, req->data, req->count, req->size); 1031 1032 if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) && 1033 (req->size < sizeof (target_ulong))) { 1034 req->data &= ((target_ulong) 1 << (8 * req->size)) - 1; 1035 } 1036 1037 if (req->dir == IOREQ_WRITE) 1038 trace_handle_ioreq_write(req, req->type, req->df, req->data_is_ptr, 1039 req->addr, req->data, req->count, req->size); 1040 1041 switch (req->type) { 1042 case IOREQ_TYPE_PIO: 1043 cpu_ioreq_pio(req); 1044 break; 1045 case IOREQ_TYPE_COPY: 1046 cpu_ioreq_move(req); 1047 break; 1048 case IOREQ_TYPE_VMWARE_PORT: 1049 handle_vmport_ioreq(state, req); 1050 break; 1051 case IOREQ_TYPE_TIMEOFFSET: 1052 break; 1053 case IOREQ_TYPE_INVALIDATE: 1054 xen_invalidate_map_cache(); 1055 break; 1056 case IOREQ_TYPE_PCI_CONFIG: 1057 cpu_ioreq_config(state, req); 1058 break; 1059 default: 1060 hw_error("Invalid ioreq type 0x%x\n", req->type); 1061 } 1062 if (req->dir == IOREQ_READ) { 1063 trace_handle_ioreq_read(req, req->type, req->df, req->data_is_ptr, 1064 req->addr, req->data, req->count, req->size); 1065 } 1066 } 1067 1068 static int handle_buffered_iopage(XenIOState *state) 1069 { 1070 buffered_iopage_t *buf_page = state->buffered_io_page; 1071 buf_ioreq_t *buf_req = NULL; 1072 ioreq_t req; 1073 int qw; 1074 1075 if (!buf_page) { 1076 return 0; 1077 } 1078 1079 memset(&req, 0x00, sizeof(req)); 1080 req.state = STATE_IOREQ_READY; 1081 req.count = 1; 1082 req.dir = IOREQ_WRITE; 1083 1084 for (;;) { 1085 uint32_t rdptr = buf_page->read_pointer, wrptr; 1086 1087 xen_rmb(); 1088 wrptr = buf_page->write_pointer; 1089 xen_rmb(); 1090 if (rdptr != buf_page->read_pointer) { 1091 continue; 1092 } 1093 if (rdptr == wrptr) { 1094 break; 1095 } 1096 buf_req = &buf_page->buf_ioreq[rdptr % IOREQ_BUFFER_SLOT_NUM]; 1097 req.size = 1U << buf_req->size; 1098 req.addr = buf_req->addr; 1099 req.data = buf_req->data; 1100 req.type = buf_req->type; 1101 xen_rmb(); 1102 qw = (req.size == 8); 1103 if (qw) { 1104 if (rdptr + 1 == wrptr) { 1105 hw_error("Incomplete quad word buffered ioreq"); 1106 } 1107 buf_req = &buf_page->buf_ioreq[(rdptr + 1) % 1108 IOREQ_BUFFER_SLOT_NUM]; 1109 req.data |= ((uint64_t)buf_req->data) << 32; 1110 xen_rmb(); 1111 } 1112 1113 handle_ioreq(state, &req); 1114 1115 /* Only req.data may get updated by handle_ioreq(), albeit even that 1116 * should not happen as such data would never make it to the guest (we 1117 * can only usefully see writes here after all). 1118 */ 1119 assert(req.state == STATE_IOREQ_READY); 1120 assert(req.count == 1); 1121 assert(req.dir == IOREQ_WRITE); 1122 assert(!req.data_is_ptr); 1123 1124 atomic_add(&buf_page->read_pointer, qw + 1); 1125 } 1126 1127 return req.count; 1128 } 1129 1130 static void handle_buffered_io(void *opaque) 1131 { 1132 XenIOState *state = opaque; 1133 1134 if (handle_buffered_iopage(state)) { 1135 timer_mod(state->buffered_io_timer, 1136 BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); 1137 } else { 1138 timer_del(state->buffered_io_timer); 1139 xenevtchn_unmask(state->xce_handle, state->bufioreq_local_port); 1140 } 1141 } 1142 1143 static void cpu_handle_ioreq(void *opaque) 1144 { 1145 XenIOState *state = opaque; 1146 ioreq_t *req = cpu_get_ioreq(state); 1147 1148 handle_buffered_iopage(state); 1149 if (req) { 1150 ioreq_t copy = *req; 1151 1152 xen_rmb(); 1153 handle_ioreq(state, ©); 1154 req->data = copy.data; 1155 1156 if (req->state != STATE_IOREQ_INPROCESS) { 1157 fprintf(stderr, "Badness in I/O request ... not in service?!: " 1158 "%x, ptr: %x, port: %"PRIx64", " 1159 "data: %"PRIx64", count: %u, size: %u, type: %u\n", 1160 req->state, req->data_is_ptr, req->addr, 1161 req->data, req->count, req->size, req->type); 1162 destroy_hvm_domain(false); 1163 return; 1164 } 1165 1166 xen_wmb(); /* Update ioreq contents /then/ update state. */ 1167 1168 /* 1169 * We do this before we send the response so that the tools 1170 * have the opportunity to pick up on the reset before the 1171 * guest resumes and does a hlt with interrupts disabled which 1172 * causes Xen to powerdown the domain. 1173 */ 1174 if (runstate_is_running()) { 1175 ShutdownCause request; 1176 1177 if (qemu_shutdown_requested_get()) { 1178 destroy_hvm_domain(false); 1179 } 1180 request = qemu_reset_requested_get(); 1181 if (request) { 1182 qemu_system_reset(request); 1183 destroy_hvm_domain(true); 1184 } 1185 } 1186 1187 req->state = STATE_IORESP_READY; 1188 xenevtchn_notify(state->xce_handle, 1189 state->ioreq_local_port[state->send_vcpu]); 1190 } 1191 } 1192 1193 static void xen_main_loop_prepare(XenIOState *state) 1194 { 1195 int evtchn_fd = -1; 1196 1197 if (state->xce_handle != NULL) { 1198 evtchn_fd = xenevtchn_fd(state->xce_handle); 1199 } 1200 1201 state->buffered_io_timer = timer_new_ms(QEMU_CLOCK_REALTIME, handle_buffered_io, 1202 state); 1203 1204 if (evtchn_fd != -1) { 1205 CPUState *cpu_state; 1206 1207 DPRINTF("%s: Init cpu_by_vcpu_id\n", __func__); 1208 CPU_FOREACH(cpu_state) { 1209 DPRINTF("%s: cpu_by_vcpu_id[%d]=%p\n", 1210 __func__, cpu_state->cpu_index, cpu_state); 1211 state->cpu_by_vcpu_id[cpu_state->cpu_index] = cpu_state; 1212 } 1213 qemu_set_fd_handler(evtchn_fd, cpu_handle_ioreq, NULL, state); 1214 } 1215 } 1216 1217 1218 static void xen_hvm_change_state_handler(void *opaque, int running, 1219 RunState rstate) 1220 { 1221 XenIOState *state = opaque; 1222 1223 if (running) { 1224 xen_main_loop_prepare(state); 1225 } 1226 1227 xen_set_ioreq_server_state(xen_domid, 1228 state->ioservid, 1229 (rstate == RUN_STATE_RUNNING)); 1230 } 1231 1232 static void xen_exit_notifier(Notifier *n, void *data) 1233 { 1234 XenIOState *state = container_of(n, XenIOState, exit); 1235 1236 xenevtchn_close(state->xce_handle); 1237 xs_daemon_close(state->xenstore); 1238 } 1239 1240 #ifdef XEN_COMPAT_PHYSMAP 1241 static void xen_read_physmap(XenIOState *state) 1242 { 1243 XenPhysmap *physmap = NULL; 1244 unsigned int len, num, i; 1245 char path[80], *value = NULL; 1246 char **entries = NULL; 1247 1248 snprintf(path, sizeof(path), 1249 "/local/domain/0/device-model/%d/physmap", xen_domid); 1250 entries = xs_directory(state->xenstore, 0, path, &num); 1251 if (entries == NULL) 1252 return; 1253 1254 for (i = 0; i < num; i++) { 1255 physmap = g_malloc(sizeof (XenPhysmap)); 1256 physmap->phys_offset = strtoull(entries[i], NULL, 16); 1257 snprintf(path, sizeof(path), 1258 "/local/domain/0/device-model/%d/physmap/%s/start_addr", 1259 xen_domid, entries[i]); 1260 value = xs_read(state->xenstore, 0, path, &len); 1261 if (value == NULL) { 1262 g_free(physmap); 1263 continue; 1264 } 1265 physmap->start_addr = strtoull(value, NULL, 16); 1266 free(value); 1267 1268 snprintf(path, sizeof(path), 1269 "/local/domain/0/device-model/%d/physmap/%s/size", 1270 xen_domid, entries[i]); 1271 value = xs_read(state->xenstore, 0, path, &len); 1272 if (value == NULL) { 1273 g_free(physmap); 1274 continue; 1275 } 1276 physmap->size = strtoull(value, NULL, 16); 1277 free(value); 1278 1279 snprintf(path, sizeof(path), 1280 "/local/domain/0/device-model/%d/physmap/%s/name", 1281 xen_domid, entries[i]); 1282 physmap->name = xs_read(state->xenstore, 0, path, &len); 1283 1284 QLIST_INSERT_HEAD(&xen_physmap, physmap, list); 1285 } 1286 free(entries); 1287 } 1288 #else 1289 static void xen_read_physmap(XenIOState *state) 1290 { 1291 } 1292 #endif 1293 1294 static void xen_wakeup_notifier(Notifier *notifier, void *data) 1295 { 1296 xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 0); 1297 } 1298 1299 static int xen_map_ioreq_server(XenIOState *state) 1300 { 1301 void *addr = NULL; 1302 xenforeignmemory_resource_handle *fres; 1303 xen_pfn_t ioreq_pfn; 1304 xen_pfn_t bufioreq_pfn; 1305 evtchn_port_t bufioreq_evtchn; 1306 int rc; 1307 1308 /* 1309 * Attempt to map using the resource API and fall back to normal 1310 * foreign mapping if this is not supported. 1311 */ 1312 QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_bufioreq != 0); 1313 QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_ioreq(0) != 1); 1314 fres = xenforeignmemory_map_resource(xen_fmem, xen_domid, 1315 XENMEM_resource_ioreq_server, 1316 state->ioservid, 0, 2, 1317 &addr, 1318 PROT_READ | PROT_WRITE, 0); 1319 if (fres != NULL) { 1320 trace_xen_map_resource_ioreq(state->ioservid, addr); 1321 state->buffered_io_page = addr; 1322 state->shared_page = addr + TARGET_PAGE_SIZE; 1323 } else if (errno != EOPNOTSUPP) { 1324 error_report("failed to map ioreq server resources: error %d handle=%p", 1325 errno, xen_xc); 1326 return -1; 1327 } 1328 1329 rc = xen_get_ioreq_server_info(xen_domid, state->ioservid, 1330 (state->shared_page == NULL) ? 1331 &ioreq_pfn : NULL, 1332 (state->buffered_io_page == NULL) ? 1333 &bufioreq_pfn : NULL, 1334 &bufioreq_evtchn); 1335 if (rc < 0) { 1336 error_report("failed to get ioreq server info: error %d handle=%p", 1337 errno, xen_xc); 1338 return rc; 1339 } 1340 1341 if (state->shared_page == NULL) { 1342 DPRINTF("shared page at pfn %lx\n", ioreq_pfn); 1343 1344 state->shared_page = xenforeignmemory_map(xen_fmem, xen_domid, 1345 PROT_READ | PROT_WRITE, 1346 1, &ioreq_pfn, NULL); 1347 if (state->shared_page == NULL) { 1348 error_report("map shared IO page returned error %d handle=%p", 1349 errno, xen_xc); 1350 } 1351 } 1352 1353 if (state->buffered_io_page == NULL) { 1354 DPRINTF("buffered io page at pfn %lx\n", bufioreq_pfn); 1355 1356 state->buffered_io_page = xenforeignmemory_map(xen_fmem, xen_domid, 1357 PROT_READ | PROT_WRITE, 1358 1, &bufioreq_pfn, 1359 NULL); 1360 if (state->buffered_io_page == NULL) { 1361 error_report("map buffered IO page returned error %d", errno); 1362 return -1; 1363 } 1364 } 1365 1366 if (state->shared_page == NULL || state->buffered_io_page == NULL) { 1367 return -1; 1368 } 1369 1370 DPRINTF("buffered io evtchn is %x\n", bufioreq_evtchn); 1371 1372 state->bufioreq_remote_port = bufioreq_evtchn; 1373 1374 return 0; 1375 } 1376 1377 void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory) 1378 { 1379 int i, rc; 1380 xen_pfn_t ioreq_pfn; 1381 XenIOState *state; 1382 1383 state = g_malloc0(sizeof (XenIOState)); 1384 1385 state->xce_handle = xenevtchn_open(NULL, 0); 1386 if (state->xce_handle == NULL) { 1387 perror("xen: event channel open"); 1388 goto err; 1389 } 1390 1391 state->xenstore = xs_daemon_open(); 1392 if (state->xenstore == NULL) { 1393 perror("xen: xenstore open"); 1394 goto err; 1395 } 1396 1397 xen_create_ioreq_server(xen_domid, &state->ioservid); 1398 1399 state->exit.notify = xen_exit_notifier; 1400 qemu_add_exit_notifier(&state->exit); 1401 1402 state->suspend.notify = xen_suspend_notifier; 1403 qemu_register_suspend_notifier(&state->suspend); 1404 1405 state->wakeup.notify = xen_wakeup_notifier; 1406 qemu_register_wakeup_notifier(&state->wakeup); 1407 1408 /* 1409 * Register wake-up support in QMP query-current-machine API 1410 */ 1411 qemu_register_wakeup_support(); 1412 1413 rc = xen_map_ioreq_server(state); 1414 if (rc < 0) { 1415 goto err; 1416 } 1417 1418 rc = xen_get_vmport_regs_pfn(xen_xc, xen_domid, &ioreq_pfn); 1419 if (!rc) { 1420 DPRINTF("shared vmport page at pfn %lx\n", ioreq_pfn); 1421 state->shared_vmport_page = 1422 xenforeignmemory_map(xen_fmem, xen_domid, PROT_READ|PROT_WRITE, 1423 1, &ioreq_pfn, NULL); 1424 if (state->shared_vmport_page == NULL) { 1425 error_report("map shared vmport IO page returned error %d handle=%p", 1426 errno, xen_xc); 1427 goto err; 1428 } 1429 } else if (rc != -ENOSYS) { 1430 error_report("get vmport regs pfn returned error %d, rc=%d", 1431 errno, rc); 1432 goto err; 1433 } 1434 1435 /* Note: cpus is empty at this point in init */ 1436 state->cpu_by_vcpu_id = g_malloc0(max_cpus * sizeof(CPUState *)); 1437 1438 rc = xen_set_ioreq_server_state(xen_domid, state->ioservid, true); 1439 if (rc < 0) { 1440 error_report("failed to enable ioreq server info: error %d handle=%p", 1441 errno, xen_xc); 1442 goto err; 1443 } 1444 1445 state->ioreq_local_port = g_malloc0(max_cpus * sizeof (evtchn_port_t)); 1446 1447 /* FIXME: how about if we overflow the page here? */ 1448 for (i = 0; i < max_cpus; i++) { 1449 rc = xenevtchn_bind_interdomain(state->xce_handle, xen_domid, 1450 xen_vcpu_eport(state->shared_page, i)); 1451 if (rc == -1) { 1452 error_report("shared evtchn %d bind error %d", i, errno); 1453 goto err; 1454 } 1455 state->ioreq_local_port[i] = rc; 1456 } 1457 1458 rc = xenevtchn_bind_interdomain(state->xce_handle, xen_domid, 1459 state->bufioreq_remote_port); 1460 if (rc == -1) { 1461 error_report("buffered evtchn bind error %d", errno); 1462 goto err; 1463 } 1464 state->bufioreq_local_port = rc; 1465 1466 /* Init RAM management */ 1467 #ifdef XEN_COMPAT_PHYSMAP 1468 xen_map_cache_init(xen_phys_offset_to_gaddr, state); 1469 #else 1470 xen_map_cache_init(NULL, state); 1471 #endif 1472 xen_ram_init(pcms, ram_size, ram_memory); 1473 1474 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state); 1475 1476 state->memory_listener = xen_memory_listener; 1477 memory_listener_register(&state->memory_listener, &address_space_memory); 1478 state->log_for_dirtybit = NULL; 1479 1480 state->io_listener = xen_io_listener; 1481 memory_listener_register(&state->io_listener, &address_space_io); 1482 1483 state->device_listener = xen_device_listener; 1484 QLIST_INIT(&state->dev_list); 1485 device_listener_register(&state->device_listener); 1486 1487 /* Initialize backend core & drivers */ 1488 if (xen_be_init() != 0) { 1489 error_report("xen backend core setup failed"); 1490 goto err; 1491 } 1492 xen_be_register_common(); 1493 1494 QLIST_INIT(&xen_physmap); 1495 xen_read_physmap(state); 1496 1497 /* Disable ACPI build because Xen handles it */ 1498 pcms->acpi_build_enabled = false; 1499 1500 return; 1501 1502 err: 1503 error_report("xen hardware virtual machine initialisation failed"); 1504 exit(1); 1505 } 1506 1507 void destroy_hvm_domain(bool reboot) 1508 { 1509 xc_interface *xc_handle; 1510 int sts; 1511 int rc; 1512 1513 unsigned int reason = reboot ? SHUTDOWN_reboot : SHUTDOWN_poweroff; 1514 1515 if (xen_dmod) { 1516 rc = xendevicemodel_shutdown(xen_dmod, xen_domid, reason); 1517 if (!rc) { 1518 return; 1519 } 1520 if (errno != ENOTTY /* old Xen */) { 1521 perror("xendevicemodel_shutdown failed"); 1522 } 1523 /* well, try the old thing then */ 1524 } 1525 1526 xc_handle = xc_interface_open(0, 0, 0); 1527 if (xc_handle == NULL) { 1528 fprintf(stderr, "Cannot acquire xenctrl handle\n"); 1529 } else { 1530 sts = xc_domain_shutdown(xc_handle, xen_domid, reason); 1531 if (sts != 0) { 1532 fprintf(stderr, "xc_domain_shutdown failed to issue %s, " 1533 "sts %d, %s\n", reboot ? "reboot" : "poweroff", 1534 sts, strerror(errno)); 1535 } else { 1536 fprintf(stderr, "Issued domain %d %s\n", xen_domid, 1537 reboot ? "reboot" : "poweroff"); 1538 } 1539 xc_interface_close(xc_handle); 1540 } 1541 } 1542 1543 void xen_register_framebuffer(MemoryRegion *mr) 1544 { 1545 framebuffer = mr; 1546 } 1547 1548 void xen_shutdown_fatal_error(const char *fmt, ...) 1549 { 1550 va_list ap; 1551 1552 va_start(ap, fmt); 1553 vfprintf(stderr, fmt, ap); 1554 va_end(ap); 1555 fprintf(stderr, "Will destroy the domain.\n"); 1556 /* destroy the domain */ 1557 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_ERROR); 1558 } 1559 1560 void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length) 1561 { 1562 if (unlikely(xen_in_migration)) { 1563 int rc; 1564 ram_addr_t start_pfn, nb_pages; 1565 1566 start = xen_phys_offset_to_gaddr(start, length); 1567 1568 if (length == 0) { 1569 length = TARGET_PAGE_SIZE; 1570 } 1571 start_pfn = start >> TARGET_PAGE_BITS; 1572 nb_pages = ((start + length + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS) 1573 - start_pfn; 1574 rc = xen_modified_memory(xen_domid, start_pfn, nb_pages); 1575 if (rc) { 1576 fprintf(stderr, 1577 "%s failed for "RAM_ADDR_FMT" ("RAM_ADDR_FMT"): %i, %s\n", 1578 __func__, start, nb_pages, errno, strerror(errno)); 1579 } 1580 } 1581 } 1582 1583 void qmp_xen_set_global_dirty_log(bool enable, Error **errp) 1584 { 1585 if (enable) { 1586 memory_global_dirty_log_start(); 1587 } else { 1588 memory_global_dirty_log_stop(); 1589 } 1590 } 1591