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/irq.h" 18 #include "hw/hw.h" 19 #include "hw/i386/apic-msidef.h" 20 #include "hw/xen/xen_common.h" 21 #include "hw/xen/xen-legacy-backend.h" 22 #include "hw/xen/xen-bus.h" 23 #include "qapi/error.h" 24 #include "qapi/qapi-commands-misc.h" 25 #include "qemu/error-report.h" 26 #include "qemu/main-loop.h" 27 #include "qemu/range.h" 28 #include "sysemu/xen-mapcache.h" 29 #include "trace.h" 30 #include "exec/address-spaces.h" 31 32 #include <xen/hvm/ioreq.h> 33 #include <xen/hvm/e820.h> 34 35 //#define DEBUG_XEN_HVM 36 37 #ifdef DEBUG_XEN_HVM 38 #define DPRINTF(fmt, ...) \ 39 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0) 40 #else 41 #define DPRINTF(fmt, ...) \ 42 do { } while (0) 43 #endif 44 45 static MemoryRegion ram_memory, ram_640k, ram_lo, ram_hi; 46 static MemoryRegion *framebuffer; 47 static bool xen_in_migration; 48 49 /* Compatibility with older version */ 50 51 /* This allows QEMU to build on a system that has Xen 4.5 or earlier 52 * installed. This here (not in hw/xen/xen_common.h) because xen/hvm/ioreq.h 53 * needs to be included before this block and hw/xen/xen_common.h needs to 54 * be included before xen/hvm/ioreq.h 55 */ 56 #ifndef IOREQ_TYPE_VMWARE_PORT 57 #define IOREQ_TYPE_VMWARE_PORT 3 58 struct vmware_regs { 59 uint32_t esi; 60 uint32_t edi; 61 uint32_t ebx; 62 uint32_t ecx; 63 uint32_t edx; 64 }; 65 typedef struct vmware_regs vmware_regs_t; 66 67 struct shared_vmport_iopage { 68 struct vmware_regs vcpu_vmport_regs[1]; 69 }; 70 typedef struct shared_vmport_iopage shared_vmport_iopage_t; 71 #endif 72 73 static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i) 74 { 75 return shared_page->vcpu_ioreq[i].vp_eport; 76 } 77 static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu) 78 { 79 return &shared_page->vcpu_ioreq[vcpu]; 80 } 81 82 #define BUFFER_IO_MAX_DELAY 100 83 84 typedef struct XenPhysmap { 85 hwaddr start_addr; 86 ram_addr_t size; 87 const char *name; 88 hwaddr phys_offset; 89 90 QLIST_ENTRY(XenPhysmap) list; 91 } XenPhysmap; 92 93 static QLIST_HEAD(, XenPhysmap) xen_physmap; 94 95 typedef struct XenPciDevice { 96 PCIDevice *pci_dev; 97 uint32_t sbdf; 98 QLIST_ENTRY(XenPciDevice) entry; 99 } XenPciDevice; 100 101 typedef struct XenIOState { 102 ioservid_t ioservid; 103 shared_iopage_t *shared_page; 104 shared_vmport_iopage_t *shared_vmport_page; 105 buffered_iopage_t *buffered_io_page; 106 QEMUTimer *buffered_io_timer; 107 CPUState **cpu_by_vcpu_id; 108 /* the evtchn port for polling the notification, */ 109 evtchn_port_t *ioreq_local_port; 110 /* evtchn remote and local ports for buffered io */ 111 evtchn_port_t bufioreq_remote_port; 112 evtchn_port_t bufioreq_local_port; 113 /* the evtchn fd for polling */ 114 xenevtchn_handle *xce_handle; 115 /* which vcpu we are serving */ 116 int send_vcpu; 117 118 struct xs_handle *xenstore; 119 MemoryListener memory_listener; 120 MemoryListener io_listener; 121 QLIST_HEAD(, XenPciDevice) dev_list; 122 DeviceListener device_listener; 123 hwaddr free_phys_offset; 124 const XenPhysmap *log_for_dirtybit; 125 /* Buffer used by xen_sync_dirty_bitmap */ 126 unsigned long *dirty_bitmap; 127 128 Notifier exit; 129 Notifier suspend; 130 Notifier wakeup; 131 } XenIOState; 132 133 /* Xen specific function for piix pci */ 134 135 int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num) 136 { 137 return irq_num + ((pci_dev->devfn >> 3) << 2); 138 } 139 140 void xen_piix3_set_irq(void *opaque, int irq_num, int level) 141 { 142 xen_set_pci_intx_level(xen_domid, 0, 0, irq_num >> 2, 143 irq_num & 3, level); 144 } 145 146 void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len) 147 { 148 int i; 149 150 /* Scan for updates to PCI link routes (0x60-0x63). */ 151 for (i = 0; i < len; i++) { 152 uint8_t v = (val >> (8 * i)) & 0xff; 153 if (v & 0x80) { 154 v = 0; 155 } 156 v &= 0xf; 157 if (((address + i) >= 0x60) && ((address + i) <= 0x63)) { 158 xen_set_pci_link_route(xen_domid, address + i - 0x60, v); 159 } 160 } 161 } 162 163 int xen_is_pirq_msi(uint32_t msi_data) 164 { 165 /* If vector is 0, the msi is remapped into a pirq, passed as 166 * dest_id. 167 */ 168 return ((msi_data & MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT) == 0; 169 } 170 171 void xen_hvm_inject_msi(uint64_t addr, uint32_t data) 172 { 173 xen_inject_msi(xen_domid, addr, data); 174 } 175 176 static void xen_suspend_notifier(Notifier *notifier, void *data) 177 { 178 xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 3); 179 } 180 181 /* Xen Interrupt Controller */ 182 183 static void xen_set_irq(void *opaque, int irq, int level) 184 { 185 xen_set_isa_irq_level(xen_domid, irq, level); 186 } 187 188 qemu_irq *xen_interrupt_controller_init(void) 189 { 190 return qemu_allocate_irqs(xen_set_irq, NULL, 16); 191 } 192 193 /* Memory Ops */ 194 195 static void xen_ram_init(PCMachineState *pcms, 196 ram_addr_t ram_size, MemoryRegion **ram_memory_p) 197 { 198 MemoryRegion *sysmem = get_system_memory(); 199 ram_addr_t block_len; 200 uint64_t user_lowmem = object_property_get_uint(qdev_get_machine(), 201 PC_MACHINE_MAX_RAM_BELOW_4G, 202 &error_abort); 203 204 /* Handle the machine opt max-ram-below-4g. It is basically doing 205 * min(xen limit, user limit). 206 */ 207 if (!user_lowmem) { 208 user_lowmem = HVM_BELOW_4G_RAM_END; /* default */ 209 } 210 if (HVM_BELOW_4G_RAM_END <= user_lowmem) { 211 user_lowmem = HVM_BELOW_4G_RAM_END; 212 } 213 214 if (ram_size >= user_lowmem) { 215 pcms->above_4g_mem_size = ram_size - user_lowmem; 216 pcms->below_4g_mem_size = user_lowmem; 217 } else { 218 pcms->above_4g_mem_size = 0; 219 pcms->below_4g_mem_size = ram_size; 220 } 221 if (!pcms->above_4g_mem_size) { 222 block_len = ram_size; 223 } else { 224 /* 225 * Xen does not allocate the memory continuously, it keeps a 226 * hole of the size computed above or passed in. 227 */ 228 block_len = (1ULL << 32) + pcms->above_4g_mem_size; 229 } 230 memory_region_init_ram(&ram_memory, NULL, "xen.ram", block_len, 231 &error_fatal); 232 *ram_memory_p = &ram_memory; 233 234 memory_region_init_alias(&ram_640k, NULL, "xen.ram.640k", 235 &ram_memory, 0, 0xa0000); 236 memory_region_add_subregion(sysmem, 0, &ram_640k); 237 /* Skip of the VGA IO memory space, it will be registered later by the VGA 238 * emulated device. 239 * 240 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load 241 * the Options ROM, so it is registered here as RAM. 242 */ 243 memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo", 244 &ram_memory, 0xc0000, 245 pcms->below_4g_mem_size - 0xc0000); 246 memory_region_add_subregion(sysmem, 0xc0000, &ram_lo); 247 if (pcms->above_4g_mem_size > 0) { 248 memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi", 249 &ram_memory, 0x100000000ULL, 250 pcms->above_4g_mem_size); 251 memory_region_add_subregion(sysmem, 0x100000000ULL, &ram_hi); 252 } 253 } 254 255 void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr, 256 Error **errp) 257 { 258 unsigned long nr_pfn; 259 xen_pfn_t *pfn_list; 260 int i; 261 262 if (runstate_check(RUN_STATE_INMIGRATE)) { 263 /* RAM already populated in Xen */ 264 fprintf(stderr, "%s: do not alloc "RAM_ADDR_FMT 265 " bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE\n", 266 __func__, size, ram_addr); 267 return; 268 } 269 270 if (mr == &ram_memory) { 271 return; 272 } 273 274 trace_xen_ram_alloc(ram_addr, size); 275 276 nr_pfn = size >> TARGET_PAGE_BITS; 277 pfn_list = g_malloc(sizeof (*pfn_list) * nr_pfn); 278 279 for (i = 0; i < nr_pfn; i++) { 280 pfn_list[i] = (ram_addr >> TARGET_PAGE_BITS) + i; 281 } 282 283 if (xc_domain_populate_physmap_exact(xen_xc, xen_domid, nr_pfn, 0, 0, pfn_list)) { 284 error_setg(errp, "xen: failed to populate ram at " RAM_ADDR_FMT, 285 ram_addr); 286 } 287 288 g_free(pfn_list); 289 } 290 291 static XenPhysmap *get_physmapping(hwaddr start_addr, ram_addr_t size) 292 { 293 XenPhysmap *physmap = NULL; 294 295 start_addr &= TARGET_PAGE_MASK; 296 297 QLIST_FOREACH(physmap, &xen_physmap, list) { 298 if (range_covers_byte(physmap->start_addr, physmap->size, start_addr)) { 299 return physmap; 300 } 301 } 302 return NULL; 303 } 304 305 static hwaddr xen_phys_offset_to_gaddr(hwaddr phys_offset, ram_addr_t size) 306 { 307 hwaddr addr = phys_offset & TARGET_PAGE_MASK; 308 XenPhysmap *physmap = NULL; 309 310 QLIST_FOREACH(physmap, &xen_physmap, list) { 311 if (range_covers_byte(physmap->phys_offset, physmap->size, addr)) { 312 return physmap->start_addr + (phys_offset - physmap->phys_offset); 313 } 314 } 315 316 return phys_offset; 317 } 318 319 #ifdef XEN_COMPAT_PHYSMAP 320 static int xen_save_physmap(XenIOState *state, XenPhysmap *physmap) 321 { 322 char path[80], value[17]; 323 324 snprintf(path, sizeof(path), 325 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/start_addr", 326 xen_domid, (uint64_t)physmap->phys_offset); 327 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)physmap->start_addr); 328 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) { 329 return -1; 330 } 331 snprintf(path, sizeof(path), 332 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/size", 333 xen_domid, (uint64_t)physmap->phys_offset); 334 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)physmap->size); 335 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) { 336 return -1; 337 } 338 if (physmap->name) { 339 snprintf(path, sizeof(path), 340 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/name", 341 xen_domid, (uint64_t)physmap->phys_offset); 342 if (!xs_write(state->xenstore, 0, path, 343 physmap->name, strlen(physmap->name))) { 344 return -1; 345 } 346 } 347 return 0; 348 } 349 #else 350 static int xen_save_physmap(XenIOState *state, XenPhysmap *physmap) 351 { 352 return 0; 353 } 354 #endif 355 356 static int xen_add_to_physmap(XenIOState *state, 357 hwaddr start_addr, 358 ram_addr_t size, 359 MemoryRegion *mr, 360 hwaddr offset_within_region) 361 { 362 unsigned long nr_pages; 363 int rc = 0; 364 XenPhysmap *physmap = NULL; 365 hwaddr pfn, start_gpfn; 366 hwaddr phys_offset = memory_region_get_ram_addr(mr); 367 const char *mr_name; 368 369 if (get_physmapping(start_addr, size)) { 370 return 0; 371 } 372 if (size <= 0) { 373 return -1; 374 } 375 376 /* Xen can only handle a single dirty log region for now and we want 377 * the linear framebuffer to be that region. 378 * Avoid tracking any regions that is not videoram and avoid tracking 379 * the legacy vga region. */ 380 if (mr == framebuffer && start_addr > 0xbffff) { 381 goto go_physmap; 382 } 383 return -1; 384 385 go_physmap: 386 DPRINTF("mapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx"\n", 387 start_addr, start_addr + size); 388 389 mr_name = memory_region_name(mr); 390 391 physmap = g_malloc(sizeof(XenPhysmap)); 392 393 physmap->start_addr = start_addr; 394 physmap->size = size; 395 physmap->name = mr_name; 396 physmap->phys_offset = phys_offset; 397 398 QLIST_INSERT_HEAD(&xen_physmap, physmap, list); 399 400 if (runstate_check(RUN_STATE_INMIGRATE)) { 401 /* Now when we have a physmap entry we can replace a dummy mapping with 402 * a real one of guest foreign memory. */ 403 uint8_t *p = xen_replace_cache_entry(phys_offset, start_addr, size); 404 assert(p && p == memory_region_get_ram_ptr(mr)); 405 406 return 0; 407 } 408 409 pfn = phys_offset >> TARGET_PAGE_BITS; 410 start_gpfn = start_addr >> TARGET_PAGE_BITS; 411 nr_pages = size >> TARGET_PAGE_BITS; 412 rc = xendevicemodel_relocate_memory(xen_dmod, xen_domid, nr_pages, pfn, 413 start_gpfn); 414 if (rc) { 415 int saved_errno = errno; 416 417 error_report("relocate_memory %lu pages from GFN %"HWADDR_PRIx 418 " to GFN %"HWADDR_PRIx" failed: %s", 419 nr_pages, pfn, start_gpfn, strerror(saved_errno)); 420 errno = saved_errno; 421 return -1; 422 } 423 424 rc = xendevicemodel_pin_memory_cacheattr(xen_dmod, xen_domid, 425 start_addr >> TARGET_PAGE_BITS, 426 (start_addr + size - 1) >> TARGET_PAGE_BITS, 427 XEN_DOMCTL_MEM_CACHEATTR_WB); 428 if (rc) { 429 error_report("pin_memory_cacheattr failed: %s", strerror(errno)); 430 } 431 return xen_save_physmap(state, physmap); 432 } 433 434 static int xen_remove_from_physmap(XenIOState *state, 435 hwaddr start_addr, 436 ram_addr_t size) 437 { 438 int rc = 0; 439 XenPhysmap *physmap = NULL; 440 hwaddr phys_offset = 0; 441 442 physmap = get_physmapping(start_addr, size); 443 if (physmap == NULL) { 444 return -1; 445 } 446 447 phys_offset = physmap->phys_offset; 448 size = physmap->size; 449 450 DPRINTF("unmapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx", at " 451 "%"HWADDR_PRIx"\n", start_addr, start_addr + size, phys_offset); 452 453 size >>= TARGET_PAGE_BITS; 454 start_addr >>= TARGET_PAGE_BITS; 455 phys_offset >>= TARGET_PAGE_BITS; 456 rc = xendevicemodel_relocate_memory(xen_dmod, xen_domid, size, start_addr, 457 phys_offset); 458 if (rc) { 459 int saved_errno = errno; 460 461 error_report("relocate_memory "RAM_ADDR_FMT" pages" 462 " from GFN %"HWADDR_PRIx 463 " to GFN %"HWADDR_PRIx" failed: %s", 464 size, start_addr, phys_offset, strerror(saved_errno)); 465 errno = saved_errno; 466 return -1; 467 } 468 469 QLIST_REMOVE(physmap, list); 470 if (state->log_for_dirtybit == physmap) { 471 state->log_for_dirtybit = NULL; 472 g_free(state->dirty_bitmap); 473 state->dirty_bitmap = NULL; 474 } 475 g_free(physmap); 476 477 return 0; 478 } 479 480 static void xen_set_memory(struct MemoryListener *listener, 481 MemoryRegionSection *section, 482 bool add) 483 { 484 XenIOState *state = container_of(listener, XenIOState, memory_listener); 485 hwaddr start_addr = section->offset_within_address_space; 486 ram_addr_t size = int128_get64(section->size); 487 bool log_dirty = memory_region_is_logging(section->mr, DIRTY_MEMORY_VGA); 488 hvmmem_type_t mem_type; 489 490 if (section->mr == &ram_memory) { 491 return; 492 } else { 493 if (add) { 494 xen_map_memory_section(xen_domid, state->ioservid, 495 section); 496 } else { 497 xen_unmap_memory_section(xen_domid, state->ioservid, 498 section); 499 } 500 } 501 502 if (!memory_region_is_ram(section->mr)) { 503 return; 504 } 505 506 if (log_dirty != add) { 507 return; 508 } 509 510 trace_xen_client_set_memory(start_addr, size, log_dirty); 511 512 start_addr &= TARGET_PAGE_MASK; 513 size = TARGET_PAGE_ALIGN(size); 514 515 if (add) { 516 if (!memory_region_is_rom(section->mr)) { 517 xen_add_to_physmap(state, start_addr, size, 518 section->mr, section->offset_within_region); 519 } else { 520 mem_type = HVMMEM_ram_ro; 521 if (xen_set_mem_type(xen_domid, mem_type, 522 start_addr >> TARGET_PAGE_BITS, 523 size >> TARGET_PAGE_BITS)) { 524 DPRINTF("xen_set_mem_type error, addr: "TARGET_FMT_plx"\n", 525 start_addr); 526 } 527 } 528 } else { 529 if (xen_remove_from_physmap(state, start_addr, size) < 0) { 530 DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr); 531 } 532 } 533 } 534 535 static void xen_region_add(MemoryListener *listener, 536 MemoryRegionSection *section) 537 { 538 memory_region_ref(section->mr); 539 xen_set_memory(listener, section, true); 540 } 541 542 static void xen_region_del(MemoryListener *listener, 543 MemoryRegionSection *section) 544 { 545 xen_set_memory(listener, section, false); 546 memory_region_unref(section->mr); 547 } 548 549 static void xen_io_add(MemoryListener *listener, 550 MemoryRegionSection *section) 551 { 552 XenIOState *state = container_of(listener, XenIOState, io_listener); 553 MemoryRegion *mr = section->mr; 554 555 if (mr->ops == &unassigned_io_ops) { 556 return; 557 } 558 559 memory_region_ref(mr); 560 561 xen_map_io_section(xen_domid, state->ioservid, section); 562 } 563 564 static void xen_io_del(MemoryListener *listener, 565 MemoryRegionSection *section) 566 { 567 XenIOState *state = container_of(listener, XenIOState, io_listener); 568 MemoryRegion *mr = section->mr; 569 570 if (mr->ops == &unassigned_io_ops) { 571 return; 572 } 573 574 xen_unmap_io_section(xen_domid, state->ioservid, section); 575 576 memory_region_unref(mr); 577 } 578 579 static void xen_device_realize(DeviceListener *listener, 580 DeviceState *dev) 581 { 582 XenIOState *state = container_of(listener, XenIOState, device_listener); 583 584 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 585 PCIDevice *pci_dev = PCI_DEVICE(dev); 586 XenPciDevice *xendev = g_new(XenPciDevice, 1); 587 588 xendev->pci_dev = pci_dev; 589 xendev->sbdf = PCI_BUILD_BDF(pci_dev_bus_num(pci_dev), 590 pci_dev->devfn); 591 QLIST_INSERT_HEAD(&state->dev_list, xendev, entry); 592 593 xen_map_pcidev(xen_domid, state->ioservid, pci_dev); 594 } 595 } 596 597 static void xen_device_unrealize(DeviceListener *listener, 598 DeviceState *dev) 599 { 600 XenIOState *state = container_of(listener, XenIOState, device_listener); 601 602 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 603 PCIDevice *pci_dev = PCI_DEVICE(dev); 604 XenPciDevice *xendev, *next; 605 606 xen_unmap_pcidev(xen_domid, state->ioservid, pci_dev); 607 608 QLIST_FOREACH_SAFE(xendev, &state->dev_list, entry, next) { 609 if (xendev->pci_dev == pci_dev) { 610 QLIST_REMOVE(xendev, entry); 611 g_free(xendev); 612 break; 613 } 614 } 615 } 616 } 617 618 static void xen_sync_dirty_bitmap(XenIOState *state, 619 hwaddr start_addr, 620 ram_addr_t size) 621 { 622 hwaddr npages = size >> TARGET_PAGE_BITS; 623 const int width = sizeof(unsigned long) * 8; 624 size_t bitmap_size = DIV_ROUND_UP(npages, width); 625 int rc, i, j; 626 const XenPhysmap *physmap = NULL; 627 628 physmap = get_physmapping(start_addr, size); 629 if (physmap == NULL) { 630 /* not handled */ 631 return; 632 } 633 634 if (state->log_for_dirtybit == NULL) { 635 state->log_for_dirtybit = physmap; 636 state->dirty_bitmap = g_new(unsigned long, bitmap_size); 637 } else if (state->log_for_dirtybit != physmap) { 638 /* Only one range for dirty bitmap can be tracked. */ 639 return; 640 } 641 642 rc = xen_track_dirty_vram(xen_domid, start_addr >> TARGET_PAGE_BITS, 643 npages, state->dirty_bitmap); 644 if (rc < 0) { 645 #ifndef ENODATA 646 #define ENODATA ENOENT 647 #endif 648 if (errno == ENODATA) { 649 memory_region_set_dirty(framebuffer, 0, size); 650 DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx 651 ", 0x" TARGET_FMT_plx "): %s\n", 652 start_addr, start_addr + size, strerror(errno)); 653 } 654 return; 655 } 656 657 for (i = 0; i < bitmap_size; i++) { 658 unsigned long map = state->dirty_bitmap[i]; 659 while (map != 0) { 660 j = ctzl(map); 661 map &= ~(1ul << j); 662 memory_region_set_dirty(framebuffer, 663 (i * width + j) * TARGET_PAGE_SIZE, 664 TARGET_PAGE_SIZE); 665 }; 666 } 667 } 668 669 static void xen_log_start(MemoryListener *listener, 670 MemoryRegionSection *section, 671 int old, int new) 672 { 673 XenIOState *state = container_of(listener, XenIOState, memory_listener); 674 675 if (new & ~old & (1 << DIRTY_MEMORY_VGA)) { 676 xen_sync_dirty_bitmap(state, section->offset_within_address_space, 677 int128_get64(section->size)); 678 } 679 } 680 681 static void xen_log_stop(MemoryListener *listener, MemoryRegionSection *section, 682 int old, int new) 683 { 684 XenIOState *state = container_of(listener, XenIOState, memory_listener); 685 686 if (old & ~new & (1 << DIRTY_MEMORY_VGA)) { 687 state->log_for_dirtybit = NULL; 688 g_free(state->dirty_bitmap); 689 state->dirty_bitmap = NULL; 690 /* Disable dirty bit tracking */ 691 xen_track_dirty_vram(xen_domid, 0, 0, NULL); 692 } 693 } 694 695 static void xen_log_sync(MemoryListener *listener, MemoryRegionSection *section) 696 { 697 XenIOState *state = container_of(listener, XenIOState, memory_listener); 698 699 xen_sync_dirty_bitmap(state, section->offset_within_address_space, 700 int128_get64(section->size)); 701 } 702 703 static void xen_log_global_start(MemoryListener *listener) 704 { 705 if (xen_enabled()) { 706 xen_in_migration = true; 707 } 708 } 709 710 static void xen_log_global_stop(MemoryListener *listener) 711 { 712 xen_in_migration = false; 713 } 714 715 static MemoryListener xen_memory_listener = { 716 .region_add = xen_region_add, 717 .region_del = xen_region_del, 718 .log_start = xen_log_start, 719 .log_stop = xen_log_stop, 720 .log_sync = xen_log_sync, 721 .log_global_start = xen_log_global_start, 722 .log_global_stop = xen_log_global_stop, 723 .priority = 10, 724 }; 725 726 static MemoryListener xen_io_listener = { 727 .region_add = xen_io_add, 728 .region_del = xen_io_del, 729 .priority = 10, 730 }; 731 732 static DeviceListener xen_device_listener = { 733 .realize = xen_device_realize, 734 .unrealize = xen_device_unrealize, 735 }; 736 737 /* get the ioreq packets from share mem */ 738 static ioreq_t *cpu_get_ioreq_from_shared_memory(XenIOState *state, int vcpu) 739 { 740 ioreq_t *req = xen_vcpu_ioreq(state->shared_page, vcpu); 741 742 if (req->state != STATE_IOREQ_READY) { 743 DPRINTF("I/O request not ready: " 744 "%x, ptr: %x, port: %"PRIx64", " 745 "data: %"PRIx64", count: %u, size: %u\n", 746 req->state, req->data_is_ptr, req->addr, 747 req->data, req->count, req->size); 748 return NULL; 749 } 750 751 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */ 752 753 req->state = STATE_IOREQ_INPROCESS; 754 return req; 755 } 756 757 /* use poll to get the port notification */ 758 /* ioreq_vec--out,the */ 759 /* retval--the number of ioreq packet */ 760 static ioreq_t *cpu_get_ioreq(XenIOState *state) 761 { 762 MachineState *ms = MACHINE(qdev_get_machine()); 763 unsigned int max_cpus = ms->smp.max_cpus; 764 int i; 765 evtchn_port_t port; 766 767 port = xenevtchn_pending(state->xce_handle); 768 if (port == state->bufioreq_local_port) { 769 timer_mod(state->buffered_io_timer, 770 BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); 771 return NULL; 772 } 773 774 if (port != -1) { 775 for (i = 0; i < max_cpus; i++) { 776 if (state->ioreq_local_port[i] == port) { 777 break; 778 } 779 } 780 781 if (i == max_cpus) { 782 hw_error("Fatal error while trying to get io event!\n"); 783 } 784 785 /* unmask the wanted port again */ 786 xenevtchn_unmask(state->xce_handle, port); 787 788 /* get the io packet from shared memory */ 789 state->send_vcpu = i; 790 return cpu_get_ioreq_from_shared_memory(state, i); 791 } 792 793 /* read error or read nothing */ 794 return NULL; 795 } 796 797 static uint32_t do_inp(uint32_t addr, unsigned long size) 798 { 799 switch (size) { 800 case 1: 801 return cpu_inb(addr); 802 case 2: 803 return cpu_inw(addr); 804 case 4: 805 return cpu_inl(addr); 806 default: 807 hw_error("inp: bad size: %04x %lx", addr, size); 808 } 809 } 810 811 static void do_outp(uint32_t addr, 812 unsigned long size, uint32_t val) 813 { 814 switch (size) { 815 case 1: 816 return cpu_outb(addr, val); 817 case 2: 818 return cpu_outw(addr, val); 819 case 4: 820 return cpu_outl(addr, val); 821 default: 822 hw_error("outp: bad size: %04x %lx", addr, size); 823 } 824 } 825 826 /* 827 * Helper functions which read/write an object from/to physical guest 828 * memory, as part of the implementation of an ioreq. 829 * 830 * Equivalent to 831 * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i, 832 * val, req->size, 0/1) 833 * except without the integer overflow problems. 834 */ 835 static void rw_phys_req_item(hwaddr addr, 836 ioreq_t *req, uint32_t i, void *val, int rw) 837 { 838 /* Do everything unsigned so overflow just results in a truncated result 839 * and accesses to undesired parts of guest memory, which is up 840 * to the guest */ 841 hwaddr offset = (hwaddr)req->size * i; 842 if (req->df) { 843 addr -= offset; 844 } else { 845 addr += offset; 846 } 847 cpu_physical_memory_rw(addr, val, req->size, rw); 848 } 849 850 static inline void read_phys_req_item(hwaddr addr, 851 ioreq_t *req, uint32_t i, void *val) 852 { 853 rw_phys_req_item(addr, req, i, val, 0); 854 } 855 static inline void write_phys_req_item(hwaddr addr, 856 ioreq_t *req, uint32_t i, void *val) 857 { 858 rw_phys_req_item(addr, req, i, val, 1); 859 } 860 861 862 static void cpu_ioreq_pio(ioreq_t *req) 863 { 864 uint32_t i; 865 866 trace_cpu_ioreq_pio(req, req->dir, req->df, req->data_is_ptr, req->addr, 867 req->data, req->count, req->size); 868 869 if (req->size > sizeof(uint32_t)) { 870 hw_error("PIO: bad size (%u)", req->size); 871 } 872 873 if (req->dir == IOREQ_READ) { 874 if (!req->data_is_ptr) { 875 req->data = do_inp(req->addr, req->size); 876 trace_cpu_ioreq_pio_read_reg(req, req->data, req->addr, 877 req->size); 878 } else { 879 uint32_t tmp; 880 881 for (i = 0; i < req->count; i++) { 882 tmp = do_inp(req->addr, req->size); 883 write_phys_req_item(req->data, req, i, &tmp); 884 } 885 } 886 } else if (req->dir == IOREQ_WRITE) { 887 if (!req->data_is_ptr) { 888 trace_cpu_ioreq_pio_write_reg(req, req->data, req->addr, 889 req->size); 890 do_outp(req->addr, req->size, req->data); 891 } else { 892 for (i = 0; i < req->count; i++) { 893 uint32_t tmp = 0; 894 895 read_phys_req_item(req->data, req, i, &tmp); 896 do_outp(req->addr, req->size, tmp); 897 } 898 } 899 } 900 } 901 902 static void cpu_ioreq_move(ioreq_t *req) 903 { 904 uint32_t i; 905 906 trace_cpu_ioreq_move(req, req->dir, req->df, req->data_is_ptr, req->addr, 907 req->data, req->count, req->size); 908 909 if (req->size > sizeof(req->data)) { 910 hw_error("MMIO: bad size (%u)", req->size); 911 } 912 913 if (!req->data_is_ptr) { 914 if (req->dir == IOREQ_READ) { 915 for (i = 0; i < req->count; i++) { 916 read_phys_req_item(req->addr, req, i, &req->data); 917 } 918 } else if (req->dir == IOREQ_WRITE) { 919 for (i = 0; i < req->count; i++) { 920 write_phys_req_item(req->addr, req, i, &req->data); 921 } 922 } 923 } else { 924 uint64_t tmp; 925 926 if (req->dir == IOREQ_READ) { 927 for (i = 0; i < req->count; i++) { 928 read_phys_req_item(req->addr, req, i, &tmp); 929 write_phys_req_item(req->data, req, i, &tmp); 930 } 931 } else if (req->dir == IOREQ_WRITE) { 932 for (i = 0; i < req->count; i++) { 933 read_phys_req_item(req->data, req, i, &tmp); 934 write_phys_req_item(req->addr, req, i, &tmp); 935 } 936 } 937 } 938 } 939 940 static void cpu_ioreq_config(XenIOState *state, ioreq_t *req) 941 { 942 uint32_t sbdf = req->addr >> 32; 943 uint32_t reg = req->addr; 944 XenPciDevice *xendev; 945 946 if (req->size != sizeof(uint8_t) && req->size != sizeof(uint16_t) && 947 req->size != sizeof(uint32_t)) { 948 hw_error("PCI config access: bad size (%u)", req->size); 949 } 950 951 if (req->count != 1) { 952 hw_error("PCI config access: bad count (%u)", req->count); 953 } 954 955 QLIST_FOREACH(xendev, &state->dev_list, entry) { 956 if (xendev->sbdf != sbdf) { 957 continue; 958 } 959 960 if (!req->data_is_ptr) { 961 if (req->dir == IOREQ_READ) { 962 req->data = pci_host_config_read_common( 963 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 964 req->size); 965 trace_cpu_ioreq_config_read(req, xendev->sbdf, reg, 966 req->size, req->data); 967 } else if (req->dir == IOREQ_WRITE) { 968 trace_cpu_ioreq_config_write(req, xendev->sbdf, reg, 969 req->size, req->data); 970 pci_host_config_write_common( 971 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 972 req->data, req->size); 973 } 974 } else { 975 uint32_t tmp; 976 977 if (req->dir == IOREQ_READ) { 978 tmp = pci_host_config_read_common( 979 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 980 req->size); 981 trace_cpu_ioreq_config_read(req, xendev->sbdf, reg, 982 req->size, tmp); 983 write_phys_req_item(req->data, req, 0, &tmp); 984 } else if (req->dir == IOREQ_WRITE) { 985 read_phys_req_item(req->data, req, 0, &tmp); 986 trace_cpu_ioreq_config_write(req, xendev->sbdf, reg, 987 req->size, tmp); 988 pci_host_config_write_common( 989 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 990 tmp, req->size); 991 } 992 } 993 } 994 } 995 996 static void regs_to_cpu(vmware_regs_t *vmport_regs, ioreq_t *req) 997 { 998 X86CPU *cpu; 999 CPUX86State *env; 1000 1001 cpu = X86_CPU(current_cpu); 1002 env = &cpu->env; 1003 env->regs[R_EAX] = req->data; 1004 env->regs[R_EBX] = vmport_regs->ebx; 1005 env->regs[R_ECX] = vmport_regs->ecx; 1006 env->regs[R_EDX] = vmport_regs->edx; 1007 env->regs[R_ESI] = vmport_regs->esi; 1008 env->regs[R_EDI] = vmport_regs->edi; 1009 } 1010 1011 static void regs_from_cpu(vmware_regs_t *vmport_regs) 1012 { 1013 X86CPU *cpu = X86_CPU(current_cpu); 1014 CPUX86State *env = &cpu->env; 1015 1016 vmport_regs->ebx = env->regs[R_EBX]; 1017 vmport_regs->ecx = env->regs[R_ECX]; 1018 vmport_regs->edx = env->regs[R_EDX]; 1019 vmport_regs->esi = env->regs[R_ESI]; 1020 vmport_regs->edi = env->regs[R_EDI]; 1021 } 1022 1023 static void handle_vmport_ioreq(XenIOState *state, ioreq_t *req) 1024 { 1025 vmware_regs_t *vmport_regs; 1026 1027 assert(state->shared_vmport_page); 1028 vmport_regs = 1029 &state->shared_vmport_page->vcpu_vmport_regs[state->send_vcpu]; 1030 QEMU_BUILD_BUG_ON(sizeof(*req) < sizeof(*vmport_regs)); 1031 1032 current_cpu = state->cpu_by_vcpu_id[state->send_vcpu]; 1033 regs_to_cpu(vmport_regs, req); 1034 cpu_ioreq_pio(req); 1035 regs_from_cpu(vmport_regs); 1036 current_cpu = NULL; 1037 } 1038 1039 static void handle_ioreq(XenIOState *state, ioreq_t *req) 1040 { 1041 trace_handle_ioreq(req, req->type, req->dir, req->df, req->data_is_ptr, 1042 req->addr, req->data, req->count, req->size); 1043 1044 if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) && 1045 (req->size < sizeof (target_ulong))) { 1046 req->data &= ((target_ulong) 1 << (8 * req->size)) - 1; 1047 } 1048 1049 if (req->dir == IOREQ_WRITE) 1050 trace_handle_ioreq_write(req, req->type, req->df, req->data_is_ptr, 1051 req->addr, req->data, req->count, req->size); 1052 1053 switch (req->type) { 1054 case IOREQ_TYPE_PIO: 1055 cpu_ioreq_pio(req); 1056 break; 1057 case IOREQ_TYPE_COPY: 1058 cpu_ioreq_move(req); 1059 break; 1060 case IOREQ_TYPE_VMWARE_PORT: 1061 handle_vmport_ioreq(state, req); 1062 break; 1063 case IOREQ_TYPE_TIMEOFFSET: 1064 break; 1065 case IOREQ_TYPE_INVALIDATE: 1066 xen_invalidate_map_cache(); 1067 break; 1068 case IOREQ_TYPE_PCI_CONFIG: 1069 cpu_ioreq_config(state, req); 1070 break; 1071 default: 1072 hw_error("Invalid ioreq type 0x%x\n", req->type); 1073 } 1074 if (req->dir == IOREQ_READ) { 1075 trace_handle_ioreq_read(req, req->type, req->df, req->data_is_ptr, 1076 req->addr, req->data, req->count, req->size); 1077 } 1078 } 1079 1080 static int handle_buffered_iopage(XenIOState *state) 1081 { 1082 buffered_iopage_t *buf_page = state->buffered_io_page; 1083 buf_ioreq_t *buf_req = NULL; 1084 ioreq_t req; 1085 int qw; 1086 1087 if (!buf_page) { 1088 return 0; 1089 } 1090 1091 memset(&req, 0x00, sizeof(req)); 1092 req.state = STATE_IOREQ_READY; 1093 req.count = 1; 1094 req.dir = IOREQ_WRITE; 1095 1096 for (;;) { 1097 uint32_t rdptr = buf_page->read_pointer, wrptr; 1098 1099 xen_rmb(); 1100 wrptr = buf_page->write_pointer; 1101 xen_rmb(); 1102 if (rdptr != buf_page->read_pointer) { 1103 continue; 1104 } 1105 if (rdptr == wrptr) { 1106 break; 1107 } 1108 buf_req = &buf_page->buf_ioreq[rdptr % IOREQ_BUFFER_SLOT_NUM]; 1109 req.size = 1U << buf_req->size; 1110 req.addr = buf_req->addr; 1111 req.data = buf_req->data; 1112 req.type = buf_req->type; 1113 xen_rmb(); 1114 qw = (req.size == 8); 1115 if (qw) { 1116 if (rdptr + 1 == wrptr) { 1117 hw_error("Incomplete quad word buffered ioreq"); 1118 } 1119 buf_req = &buf_page->buf_ioreq[(rdptr + 1) % 1120 IOREQ_BUFFER_SLOT_NUM]; 1121 req.data |= ((uint64_t)buf_req->data) << 32; 1122 xen_rmb(); 1123 } 1124 1125 handle_ioreq(state, &req); 1126 1127 /* Only req.data may get updated by handle_ioreq(), albeit even that 1128 * should not happen as such data would never make it to the guest (we 1129 * can only usefully see writes here after all). 1130 */ 1131 assert(req.state == STATE_IOREQ_READY); 1132 assert(req.count == 1); 1133 assert(req.dir == IOREQ_WRITE); 1134 assert(!req.data_is_ptr); 1135 1136 atomic_add(&buf_page->read_pointer, qw + 1); 1137 } 1138 1139 return req.count; 1140 } 1141 1142 static void handle_buffered_io(void *opaque) 1143 { 1144 XenIOState *state = opaque; 1145 1146 if (handle_buffered_iopage(state)) { 1147 timer_mod(state->buffered_io_timer, 1148 BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); 1149 } else { 1150 timer_del(state->buffered_io_timer); 1151 xenevtchn_unmask(state->xce_handle, state->bufioreq_local_port); 1152 } 1153 } 1154 1155 static void cpu_handle_ioreq(void *opaque) 1156 { 1157 XenIOState *state = opaque; 1158 ioreq_t *req = cpu_get_ioreq(state); 1159 1160 handle_buffered_iopage(state); 1161 if (req) { 1162 ioreq_t copy = *req; 1163 1164 xen_rmb(); 1165 handle_ioreq(state, ©); 1166 req->data = copy.data; 1167 1168 if (req->state != STATE_IOREQ_INPROCESS) { 1169 fprintf(stderr, "Badness in I/O request ... not in service?!: " 1170 "%x, ptr: %x, port: %"PRIx64", " 1171 "data: %"PRIx64", count: %u, size: %u, type: %u\n", 1172 req->state, req->data_is_ptr, req->addr, 1173 req->data, req->count, req->size, req->type); 1174 destroy_hvm_domain(false); 1175 return; 1176 } 1177 1178 xen_wmb(); /* Update ioreq contents /then/ update state. */ 1179 1180 /* 1181 * We do this before we send the response so that the tools 1182 * have the opportunity to pick up on the reset before the 1183 * guest resumes and does a hlt with interrupts disabled which 1184 * causes Xen to powerdown the domain. 1185 */ 1186 if (runstate_is_running()) { 1187 ShutdownCause request; 1188 1189 if (qemu_shutdown_requested_get()) { 1190 destroy_hvm_domain(false); 1191 } 1192 request = qemu_reset_requested_get(); 1193 if (request) { 1194 qemu_system_reset(request); 1195 destroy_hvm_domain(true); 1196 } 1197 } 1198 1199 req->state = STATE_IORESP_READY; 1200 xenevtchn_notify(state->xce_handle, 1201 state->ioreq_local_port[state->send_vcpu]); 1202 } 1203 } 1204 1205 static void xen_main_loop_prepare(XenIOState *state) 1206 { 1207 int evtchn_fd = -1; 1208 1209 if (state->xce_handle != NULL) { 1210 evtchn_fd = xenevtchn_fd(state->xce_handle); 1211 } 1212 1213 state->buffered_io_timer = timer_new_ms(QEMU_CLOCK_REALTIME, handle_buffered_io, 1214 state); 1215 1216 if (evtchn_fd != -1) { 1217 CPUState *cpu_state; 1218 1219 DPRINTF("%s: Init cpu_by_vcpu_id\n", __func__); 1220 CPU_FOREACH(cpu_state) { 1221 DPRINTF("%s: cpu_by_vcpu_id[%d]=%p\n", 1222 __func__, cpu_state->cpu_index, cpu_state); 1223 state->cpu_by_vcpu_id[cpu_state->cpu_index] = cpu_state; 1224 } 1225 qemu_set_fd_handler(evtchn_fd, cpu_handle_ioreq, NULL, state); 1226 } 1227 } 1228 1229 1230 static void xen_hvm_change_state_handler(void *opaque, int running, 1231 RunState rstate) 1232 { 1233 XenIOState *state = opaque; 1234 1235 if (running) { 1236 xen_main_loop_prepare(state); 1237 } 1238 1239 xen_set_ioreq_server_state(xen_domid, 1240 state->ioservid, 1241 (rstate == RUN_STATE_RUNNING)); 1242 } 1243 1244 static void xen_exit_notifier(Notifier *n, void *data) 1245 { 1246 XenIOState *state = container_of(n, XenIOState, exit); 1247 1248 xenevtchn_close(state->xce_handle); 1249 xs_daemon_close(state->xenstore); 1250 } 1251 1252 #ifdef XEN_COMPAT_PHYSMAP 1253 static void xen_read_physmap(XenIOState *state) 1254 { 1255 XenPhysmap *physmap = NULL; 1256 unsigned int len, num, i; 1257 char path[80], *value = NULL; 1258 char **entries = NULL; 1259 1260 snprintf(path, sizeof(path), 1261 "/local/domain/0/device-model/%d/physmap", xen_domid); 1262 entries = xs_directory(state->xenstore, 0, path, &num); 1263 if (entries == NULL) 1264 return; 1265 1266 for (i = 0; i < num; i++) { 1267 physmap = g_malloc(sizeof (XenPhysmap)); 1268 physmap->phys_offset = strtoull(entries[i], NULL, 16); 1269 snprintf(path, sizeof(path), 1270 "/local/domain/0/device-model/%d/physmap/%s/start_addr", 1271 xen_domid, entries[i]); 1272 value = xs_read(state->xenstore, 0, path, &len); 1273 if (value == NULL) { 1274 g_free(physmap); 1275 continue; 1276 } 1277 physmap->start_addr = strtoull(value, NULL, 16); 1278 free(value); 1279 1280 snprintf(path, sizeof(path), 1281 "/local/domain/0/device-model/%d/physmap/%s/size", 1282 xen_domid, entries[i]); 1283 value = xs_read(state->xenstore, 0, path, &len); 1284 if (value == NULL) { 1285 g_free(physmap); 1286 continue; 1287 } 1288 physmap->size = strtoull(value, NULL, 16); 1289 free(value); 1290 1291 snprintf(path, sizeof(path), 1292 "/local/domain/0/device-model/%d/physmap/%s/name", 1293 xen_domid, entries[i]); 1294 physmap->name = xs_read(state->xenstore, 0, path, &len); 1295 1296 QLIST_INSERT_HEAD(&xen_physmap, physmap, list); 1297 } 1298 free(entries); 1299 } 1300 #else 1301 static void xen_read_physmap(XenIOState *state) 1302 { 1303 } 1304 #endif 1305 1306 static void xen_wakeup_notifier(Notifier *notifier, void *data) 1307 { 1308 xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 0); 1309 } 1310 1311 static int xen_map_ioreq_server(XenIOState *state) 1312 { 1313 void *addr = NULL; 1314 xenforeignmemory_resource_handle *fres; 1315 xen_pfn_t ioreq_pfn; 1316 xen_pfn_t bufioreq_pfn; 1317 evtchn_port_t bufioreq_evtchn; 1318 int rc; 1319 1320 /* 1321 * Attempt to map using the resource API and fall back to normal 1322 * foreign mapping if this is not supported. 1323 */ 1324 QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_bufioreq != 0); 1325 QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_ioreq(0) != 1); 1326 fres = xenforeignmemory_map_resource(xen_fmem, xen_domid, 1327 XENMEM_resource_ioreq_server, 1328 state->ioservid, 0, 2, 1329 &addr, 1330 PROT_READ | PROT_WRITE, 0); 1331 if (fres != NULL) { 1332 trace_xen_map_resource_ioreq(state->ioservid, addr); 1333 state->buffered_io_page = addr; 1334 state->shared_page = addr + TARGET_PAGE_SIZE; 1335 } else if (errno != EOPNOTSUPP) { 1336 error_report("failed to map ioreq server resources: error %d handle=%p", 1337 errno, xen_xc); 1338 return -1; 1339 } 1340 1341 rc = xen_get_ioreq_server_info(xen_domid, state->ioservid, 1342 (state->shared_page == NULL) ? 1343 &ioreq_pfn : NULL, 1344 (state->buffered_io_page == NULL) ? 1345 &bufioreq_pfn : NULL, 1346 &bufioreq_evtchn); 1347 if (rc < 0) { 1348 error_report("failed to get ioreq server info: error %d handle=%p", 1349 errno, xen_xc); 1350 return rc; 1351 } 1352 1353 if (state->shared_page == NULL) { 1354 DPRINTF("shared page at pfn %lx\n", ioreq_pfn); 1355 1356 state->shared_page = xenforeignmemory_map(xen_fmem, xen_domid, 1357 PROT_READ | PROT_WRITE, 1358 1, &ioreq_pfn, NULL); 1359 if (state->shared_page == NULL) { 1360 error_report("map shared IO page returned error %d handle=%p", 1361 errno, xen_xc); 1362 } 1363 } 1364 1365 if (state->buffered_io_page == NULL) { 1366 DPRINTF("buffered io page at pfn %lx\n", bufioreq_pfn); 1367 1368 state->buffered_io_page = xenforeignmemory_map(xen_fmem, xen_domid, 1369 PROT_READ | PROT_WRITE, 1370 1, &bufioreq_pfn, 1371 NULL); 1372 if (state->buffered_io_page == NULL) { 1373 error_report("map buffered IO page returned error %d", errno); 1374 return -1; 1375 } 1376 } 1377 1378 if (state->shared_page == NULL || state->buffered_io_page == NULL) { 1379 return -1; 1380 } 1381 1382 DPRINTF("buffered io evtchn is %x\n", bufioreq_evtchn); 1383 1384 state->bufioreq_remote_port = bufioreq_evtchn; 1385 1386 return 0; 1387 } 1388 1389 void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory) 1390 { 1391 MachineState *ms = MACHINE(pcms); 1392 unsigned int max_cpus = ms->smp.max_cpus; 1393 int i, rc; 1394 xen_pfn_t ioreq_pfn; 1395 XenIOState *state; 1396 1397 state = g_malloc0(sizeof (XenIOState)); 1398 1399 state->xce_handle = xenevtchn_open(NULL, 0); 1400 if (state->xce_handle == NULL) { 1401 perror("xen: event channel open"); 1402 goto err; 1403 } 1404 1405 state->xenstore = xs_daemon_open(); 1406 if (state->xenstore == NULL) { 1407 perror("xen: xenstore open"); 1408 goto err; 1409 } 1410 1411 xen_create_ioreq_server(xen_domid, &state->ioservid); 1412 1413 state->exit.notify = xen_exit_notifier; 1414 qemu_add_exit_notifier(&state->exit); 1415 1416 state->suspend.notify = xen_suspend_notifier; 1417 qemu_register_suspend_notifier(&state->suspend); 1418 1419 state->wakeup.notify = xen_wakeup_notifier; 1420 qemu_register_wakeup_notifier(&state->wakeup); 1421 1422 /* 1423 * Register wake-up support in QMP query-current-machine API 1424 */ 1425 qemu_register_wakeup_support(); 1426 1427 rc = xen_map_ioreq_server(state); 1428 if (rc < 0) { 1429 goto err; 1430 } 1431 1432 rc = xen_get_vmport_regs_pfn(xen_xc, xen_domid, &ioreq_pfn); 1433 if (!rc) { 1434 DPRINTF("shared vmport page at pfn %lx\n", ioreq_pfn); 1435 state->shared_vmport_page = 1436 xenforeignmemory_map(xen_fmem, xen_domid, PROT_READ|PROT_WRITE, 1437 1, &ioreq_pfn, NULL); 1438 if (state->shared_vmport_page == NULL) { 1439 error_report("map shared vmport IO page returned error %d handle=%p", 1440 errno, xen_xc); 1441 goto err; 1442 } 1443 } else if (rc != -ENOSYS) { 1444 error_report("get vmport regs pfn returned error %d, rc=%d", 1445 errno, rc); 1446 goto err; 1447 } 1448 1449 /* Note: cpus is empty at this point in init */ 1450 state->cpu_by_vcpu_id = g_malloc0(max_cpus * sizeof(CPUState *)); 1451 1452 rc = xen_set_ioreq_server_state(xen_domid, state->ioservid, true); 1453 if (rc < 0) { 1454 error_report("failed to enable ioreq server info: error %d handle=%p", 1455 errno, xen_xc); 1456 goto err; 1457 } 1458 1459 state->ioreq_local_port = g_malloc0(max_cpus * sizeof (evtchn_port_t)); 1460 1461 /* FIXME: how about if we overflow the page here? */ 1462 for (i = 0; i < max_cpus; i++) { 1463 rc = xenevtchn_bind_interdomain(state->xce_handle, xen_domid, 1464 xen_vcpu_eport(state->shared_page, i)); 1465 if (rc == -1) { 1466 error_report("shared evtchn %d bind error %d", i, errno); 1467 goto err; 1468 } 1469 state->ioreq_local_port[i] = rc; 1470 } 1471 1472 rc = xenevtchn_bind_interdomain(state->xce_handle, xen_domid, 1473 state->bufioreq_remote_port); 1474 if (rc == -1) { 1475 error_report("buffered evtchn bind error %d", errno); 1476 goto err; 1477 } 1478 state->bufioreq_local_port = rc; 1479 1480 /* Init RAM management */ 1481 #ifdef XEN_COMPAT_PHYSMAP 1482 xen_map_cache_init(xen_phys_offset_to_gaddr, state); 1483 #else 1484 xen_map_cache_init(NULL, state); 1485 #endif 1486 xen_ram_init(pcms, ram_size, ram_memory); 1487 1488 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state); 1489 1490 state->memory_listener = xen_memory_listener; 1491 memory_listener_register(&state->memory_listener, &address_space_memory); 1492 state->log_for_dirtybit = NULL; 1493 1494 state->io_listener = xen_io_listener; 1495 memory_listener_register(&state->io_listener, &address_space_io); 1496 1497 state->device_listener = xen_device_listener; 1498 QLIST_INIT(&state->dev_list); 1499 device_listener_register(&state->device_listener); 1500 1501 xen_bus_init(); 1502 1503 /* Initialize backend core & drivers */ 1504 if (xen_be_init() != 0) { 1505 error_report("xen backend core setup failed"); 1506 goto err; 1507 } 1508 xen_be_register_common(); 1509 1510 QLIST_INIT(&xen_physmap); 1511 xen_read_physmap(state); 1512 1513 /* Disable ACPI build because Xen handles it */ 1514 pcms->acpi_build_enabled = false; 1515 1516 return; 1517 1518 err: 1519 error_report("xen hardware virtual machine initialisation failed"); 1520 exit(1); 1521 } 1522 1523 void destroy_hvm_domain(bool reboot) 1524 { 1525 xc_interface *xc_handle; 1526 int sts; 1527 int rc; 1528 1529 unsigned int reason = reboot ? SHUTDOWN_reboot : SHUTDOWN_poweroff; 1530 1531 if (xen_dmod) { 1532 rc = xendevicemodel_shutdown(xen_dmod, xen_domid, reason); 1533 if (!rc) { 1534 return; 1535 } 1536 if (errno != ENOTTY /* old Xen */) { 1537 perror("xendevicemodel_shutdown failed"); 1538 } 1539 /* well, try the old thing then */ 1540 } 1541 1542 xc_handle = xc_interface_open(0, 0, 0); 1543 if (xc_handle == NULL) { 1544 fprintf(stderr, "Cannot acquire xenctrl handle\n"); 1545 } else { 1546 sts = xc_domain_shutdown(xc_handle, xen_domid, reason); 1547 if (sts != 0) { 1548 fprintf(stderr, "xc_domain_shutdown failed to issue %s, " 1549 "sts %d, %s\n", reboot ? "reboot" : "poweroff", 1550 sts, strerror(errno)); 1551 } else { 1552 fprintf(stderr, "Issued domain %d %s\n", xen_domid, 1553 reboot ? "reboot" : "poweroff"); 1554 } 1555 xc_interface_close(xc_handle); 1556 } 1557 } 1558 1559 void xen_register_framebuffer(MemoryRegion *mr) 1560 { 1561 framebuffer = mr; 1562 } 1563 1564 void xen_shutdown_fatal_error(const char *fmt, ...) 1565 { 1566 va_list ap; 1567 1568 va_start(ap, fmt); 1569 vfprintf(stderr, fmt, ap); 1570 va_end(ap); 1571 fprintf(stderr, "Will destroy the domain.\n"); 1572 /* destroy the domain */ 1573 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_ERROR); 1574 } 1575 1576 void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length) 1577 { 1578 if (unlikely(xen_in_migration)) { 1579 int rc; 1580 ram_addr_t start_pfn, nb_pages; 1581 1582 start = xen_phys_offset_to_gaddr(start, length); 1583 1584 if (length == 0) { 1585 length = TARGET_PAGE_SIZE; 1586 } 1587 start_pfn = start >> TARGET_PAGE_BITS; 1588 nb_pages = ((start + length + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS) 1589 - start_pfn; 1590 rc = xen_modified_memory(xen_domid, start_pfn, nb_pages); 1591 if (rc) { 1592 fprintf(stderr, 1593 "%s failed for "RAM_ADDR_FMT" ("RAM_ADDR_FMT"): %i, %s\n", 1594 __func__, start, nb_pages, errno, strerror(errno)); 1595 } 1596 } 1597 } 1598 1599 void qmp_xen_set_global_dirty_log(bool enable, Error **errp) 1600 { 1601 if (enable) { 1602 memory_global_dirty_log_start(); 1603 } else { 1604 memory_global_dirty_log_stop(); 1605 } 1606 } 1607