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/runstate.h" 29 #include "sysemu/sysemu.h" 30 #include "sysemu/xen-mapcache.h" 31 #include "trace.h" 32 #include "exec/address-spaces.h" 33 34 #include <xen/hvm/ioreq.h> 35 #include <xen/hvm/e820.h> 36 37 //#define DEBUG_XEN_HVM 38 39 #ifdef DEBUG_XEN_HVM 40 #define DPRINTF(fmt, ...) \ 41 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0) 42 #else 43 #define DPRINTF(fmt, ...) \ 44 do { } while (0) 45 #endif 46 47 static MemoryRegion ram_memory, ram_640k, ram_lo, ram_hi; 48 static MemoryRegion *framebuffer; 49 static bool xen_in_migration; 50 51 /* Compatibility with older version */ 52 53 /* This allows QEMU to build on a system that has Xen 4.5 or earlier 54 * installed. This here (not in hw/xen/xen_common.h) because xen/hvm/ioreq.h 55 * needs to be included before this block and hw/xen/xen_common.h needs to 56 * be included before xen/hvm/ioreq.h 57 */ 58 #ifndef IOREQ_TYPE_VMWARE_PORT 59 #define IOREQ_TYPE_VMWARE_PORT 3 60 struct vmware_regs { 61 uint32_t esi; 62 uint32_t edi; 63 uint32_t ebx; 64 uint32_t ecx; 65 uint32_t edx; 66 }; 67 typedef struct vmware_regs vmware_regs_t; 68 69 struct shared_vmport_iopage { 70 struct vmware_regs vcpu_vmport_regs[1]; 71 }; 72 typedef struct shared_vmport_iopage shared_vmport_iopage_t; 73 #endif 74 75 static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i) 76 { 77 return shared_page->vcpu_ioreq[i].vp_eport; 78 } 79 static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu) 80 { 81 return &shared_page->vcpu_ioreq[vcpu]; 82 } 83 84 #define BUFFER_IO_MAX_DELAY 100 85 86 typedef struct XenPhysmap { 87 hwaddr start_addr; 88 ram_addr_t size; 89 const char *name; 90 hwaddr phys_offset; 91 92 QLIST_ENTRY(XenPhysmap) list; 93 } XenPhysmap; 94 95 static QLIST_HEAD(, XenPhysmap) xen_physmap; 96 97 typedef struct XenPciDevice { 98 PCIDevice *pci_dev; 99 uint32_t sbdf; 100 QLIST_ENTRY(XenPciDevice) entry; 101 } XenPciDevice; 102 103 typedef struct XenIOState { 104 ioservid_t ioservid; 105 shared_iopage_t *shared_page; 106 shared_vmport_iopage_t *shared_vmport_page; 107 buffered_iopage_t *buffered_io_page; 108 QEMUTimer *buffered_io_timer; 109 CPUState **cpu_by_vcpu_id; 110 /* the evtchn port for polling the notification, */ 111 evtchn_port_t *ioreq_local_port; 112 /* evtchn remote and local ports for buffered io */ 113 evtchn_port_t bufioreq_remote_port; 114 evtchn_port_t bufioreq_local_port; 115 /* the evtchn fd for polling */ 116 xenevtchn_handle *xce_handle; 117 /* which vcpu we are serving */ 118 int send_vcpu; 119 120 struct xs_handle *xenstore; 121 MemoryListener memory_listener; 122 MemoryListener io_listener; 123 QLIST_HEAD(, XenPciDevice) dev_list; 124 DeviceListener device_listener; 125 hwaddr free_phys_offset; 126 const XenPhysmap *log_for_dirtybit; 127 /* Buffer used by xen_sync_dirty_bitmap */ 128 unsigned long *dirty_bitmap; 129 130 Notifier exit; 131 Notifier suspend; 132 Notifier wakeup; 133 } XenIOState; 134 135 /* Xen specific function for piix pci */ 136 137 int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num) 138 { 139 return irq_num + ((pci_dev->devfn >> 3) << 2); 140 } 141 142 void xen_piix3_set_irq(void *opaque, int irq_num, int level) 143 { 144 xen_set_pci_intx_level(xen_domid, 0, 0, irq_num >> 2, 145 irq_num & 3, level); 146 } 147 148 void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len) 149 { 150 int i; 151 152 /* Scan for updates to PCI link routes (0x60-0x63). */ 153 for (i = 0; i < len; i++) { 154 uint8_t v = (val >> (8 * i)) & 0xff; 155 if (v & 0x80) { 156 v = 0; 157 } 158 v &= 0xf; 159 if (((address + i) >= 0x60) && ((address + i) <= 0x63)) { 160 xen_set_pci_link_route(xen_domid, address + i - 0x60, v); 161 } 162 } 163 } 164 165 int xen_is_pirq_msi(uint32_t msi_data) 166 { 167 /* If vector is 0, the msi is remapped into a pirq, passed as 168 * dest_id. 169 */ 170 return ((msi_data & MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT) == 0; 171 } 172 173 void xen_hvm_inject_msi(uint64_t addr, uint32_t data) 174 { 175 xen_inject_msi(xen_domid, addr, data); 176 } 177 178 static void xen_suspend_notifier(Notifier *notifier, void *data) 179 { 180 xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 3); 181 } 182 183 /* Xen Interrupt Controller */ 184 185 static void xen_set_irq(void *opaque, int irq, int level) 186 { 187 xen_set_isa_irq_level(xen_domid, irq, level); 188 } 189 190 qemu_irq *xen_interrupt_controller_init(void) 191 { 192 return qemu_allocate_irqs(xen_set_irq, NULL, 16); 193 } 194 195 /* Memory Ops */ 196 197 static void xen_ram_init(PCMachineState *pcms, 198 ram_addr_t ram_size, MemoryRegion **ram_memory_p) 199 { 200 X86MachineState *x86ms = X86_MACHINE(pcms); 201 MemoryRegion *sysmem = get_system_memory(); 202 ram_addr_t block_len; 203 uint64_t user_lowmem = 204 object_property_get_uint(qdev_get_machine(), 205 X86_MACHINE_MAX_RAM_BELOW_4G, 206 &error_abort); 207 208 /* Handle the machine opt max-ram-below-4g. It is basically doing 209 * min(xen limit, user limit). 210 */ 211 if (!user_lowmem) { 212 user_lowmem = HVM_BELOW_4G_RAM_END; /* default */ 213 } 214 if (HVM_BELOW_4G_RAM_END <= user_lowmem) { 215 user_lowmem = HVM_BELOW_4G_RAM_END; 216 } 217 218 if (ram_size >= user_lowmem) { 219 x86ms->above_4g_mem_size = ram_size - user_lowmem; 220 x86ms->below_4g_mem_size = user_lowmem; 221 } else { 222 x86ms->above_4g_mem_size = 0; 223 x86ms->below_4g_mem_size = ram_size; 224 } 225 if (!x86ms->above_4g_mem_size) { 226 block_len = ram_size; 227 } else { 228 /* 229 * Xen does not allocate the memory continuously, it keeps a 230 * hole of the size computed above or passed in. 231 */ 232 block_len = (1ULL << 32) + x86ms->above_4g_mem_size; 233 } 234 memory_region_init_ram(&ram_memory, NULL, "xen.ram", block_len, 235 &error_fatal); 236 *ram_memory_p = &ram_memory; 237 238 memory_region_init_alias(&ram_640k, NULL, "xen.ram.640k", 239 &ram_memory, 0, 0xa0000); 240 memory_region_add_subregion(sysmem, 0, &ram_640k); 241 /* Skip of the VGA IO memory space, it will be registered later by the VGA 242 * emulated device. 243 * 244 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load 245 * the Options ROM, so it is registered here as RAM. 246 */ 247 memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo", 248 &ram_memory, 0xc0000, 249 x86ms->below_4g_mem_size - 0xc0000); 250 memory_region_add_subregion(sysmem, 0xc0000, &ram_lo); 251 if (x86ms->above_4g_mem_size > 0) { 252 memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi", 253 &ram_memory, 0x100000000ULL, 254 x86ms->above_4g_mem_size); 255 memory_region_add_subregion(sysmem, 0x100000000ULL, &ram_hi); 256 } 257 } 258 259 void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr, 260 Error **errp) 261 { 262 unsigned long nr_pfn; 263 xen_pfn_t *pfn_list; 264 int i; 265 266 if (runstate_check(RUN_STATE_INMIGRATE)) { 267 /* RAM already populated in Xen */ 268 fprintf(stderr, "%s: do not alloc "RAM_ADDR_FMT 269 " bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE\n", 270 __func__, size, ram_addr); 271 return; 272 } 273 274 if (mr == &ram_memory) { 275 return; 276 } 277 278 trace_xen_ram_alloc(ram_addr, size); 279 280 nr_pfn = size >> TARGET_PAGE_BITS; 281 pfn_list = g_malloc(sizeof (*pfn_list) * nr_pfn); 282 283 for (i = 0; i < nr_pfn; i++) { 284 pfn_list[i] = (ram_addr >> TARGET_PAGE_BITS) + i; 285 } 286 287 if (xc_domain_populate_physmap_exact(xen_xc, xen_domid, nr_pfn, 0, 0, pfn_list)) { 288 error_setg(errp, "xen: failed to populate ram at " RAM_ADDR_FMT, 289 ram_addr); 290 } 291 292 g_free(pfn_list); 293 } 294 295 static XenPhysmap *get_physmapping(hwaddr start_addr, ram_addr_t size) 296 { 297 XenPhysmap *physmap = NULL; 298 299 start_addr &= TARGET_PAGE_MASK; 300 301 QLIST_FOREACH(physmap, &xen_physmap, list) { 302 if (range_covers_byte(physmap->start_addr, physmap->size, start_addr)) { 303 return physmap; 304 } 305 } 306 return NULL; 307 } 308 309 static hwaddr xen_phys_offset_to_gaddr(hwaddr phys_offset, ram_addr_t size) 310 { 311 hwaddr addr = phys_offset & TARGET_PAGE_MASK; 312 XenPhysmap *physmap = NULL; 313 314 QLIST_FOREACH(physmap, &xen_physmap, list) { 315 if (range_covers_byte(physmap->phys_offset, physmap->size, addr)) { 316 return physmap->start_addr + (phys_offset - physmap->phys_offset); 317 } 318 } 319 320 return phys_offset; 321 } 322 323 #ifdef XEN_COMPAT_PHYSMAP 324 static int xen_save_physmap(XenIOState *state, XenPhysmap *physmap) 325 { 326 char path[80], value[17]; 327 328 snprintf(path, sizeof(path), 329 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/start_addr", 330 xen_domid, (uint64_t)physmap->phys_offset); 331 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)physmap->start_addr); 332 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) { 333 return -1; 334 } 335 snprintf(path, sizeof(path), 336 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/size", 337 xen_domid, (uint64_t)physmap->phys_offset); 338 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)physmap->size); 339 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) { 340 return -1; 341 } 342 if (physmap->name) { 343 snprintf(path, sizeof(path), 344 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/name", 345 xen_domid, (uint64_t)physmap->phys_offset); 346 if (!xs_write(state->xenstore, 0, path, 347 physmap->name, strlen(physmap->name))) { 348 return -1; 349 } 350 } 351 return 0; 352 } 353 #else 354 static int xen_save_physmap(XenIOState *state, XenPhysmap *physmap) 355 { 356 return 0; 357 } 358 #endif 359 360 static int xen_add_to_physmap(XenIOState *state, 361 hwaddr start_addr, 362 ram_addr_t size, 363 MemoryRegion *mr, 364 hwaddr offset_within_region) 365 { 366 unsigned long nr_pages; 367 int rc = 0; 368 XenPhysmap *physmap = NULL; 369 hwaddr pfn, start_gpfn; 370 hwaddr phys_offset = memory_region_get_ram_addr(mr); 371 const char *mr_name; 372 373 if (get_physmapping(start_addr, size)) { 374 return 0; 375 } 376 if (size <= 0) { 377 return -1; 378 } 379 380 /* Xen can only handle a single dirty log region for now and we want 381 * the linear framebuffer to be that region. 382 * Avoid tracking any regions that is not videoram and avoid tracking 383 * the legacy vga region. */ 384 if (mr == framebuffer && start_addr > 0xbffff) { 385 goto go_physmap; 386 } 387 return -1; 388 389 go_physmap: 390 DPRINTF("mapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx"\n", 391 start_addr, start_addr + size); 392 393 mr_name = memory_region_name(mr); 394 395 physmap = g_malloc(sizeof(XenPhysmap)); 396 397 physmap->start_addr = start_addr; 398 physmap->size = size; 399 physmap->name = mr_name; 400 physmap->phys_offset = phys_offset; 401 402 QLIST_INSERT_HEAD(&xen_physmap, physmap, list); 403 404 if (runstate_check(RUN_STATE_INMIGRATE)) { 405 /* Now when we have a physmap entry we can replace a dummy mapping with 406 * a real one of guest foreign memory. */ 407 uint8_t *p = xen_replace_cache_entry(phys_offset, start_addr, size); 408 assert(p && p == memory_region_get_ram_ptr(mr)); 409 410 return 0; 411 } 412 413 pfn = phys_offset >> TARGET_PAGE_BITS; 414 start_gpfn = start_addr >> TARGET_PAGE_BITS; 415 nr_pages = size >> TARGET_PAGE_BITS; 416 rc = xendevicemodel_relocate_memory(xen_dmod, xen_domid, nr_pages, pfn, 417 start_gpfn); 418 if (rc) { 419 int saved_errno = errno; 420 421 error_report("relocate_memory %lu pages from GFN %"HWADDR_PRIx 422 " to GFN %"HWADDR_PRIx" failed: %s", 423 nr_pages, pfn, start_gpfn, strerror(saved_errno)); 424 errno = saved_errno; 425 return -1; 426 } 427 428 rc = xendevicemodel_pin_memory_cacheattr(xen_dmod, xen_domid, 429 start_addr >> TARGET_PAGE_BITS, 430 (start_addr + size - 1) >> TARGET_PAGE_BITS, 431 XEN_DOMCTL_MEM_CACHEATTR_WB); 432 if (rc) { 433 error_report("pin_memory_cacheattr failed: %s", strerror(errno)); 434 } 435 return xen_save_physmap(state, physmap); 436 } 437 438 static int xen_remove_from_physmap(XenIOState *state, 439 hwaddr start_addr, 440 ram_addr_t size) 441 { 442 int rc = 0; 443 XenPhysmap *physmap = NULL; 444 hwaddr phys_offset = 0; 445 446 physmap = get_physmapping(start_addr, size); 447 if (physmap == NULL) { 448 return -1; 449 } 450 451 phys_offset = physmap->phys_offset; 452 size = physmap->size; 453 454 DPRINTF("unmapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx", at " 455 "%"HWADDR_PRIx"\n", start_addr, start_addr + size, phys_offset); 456 457 size >>= TARGET_PAGE_BITS; 458 start_addr >>= TARGET_PAGE_BITS; 459 phys_offset >>= TARGET_PAGE_BITS; 460 rc = xendevicemodel_relocate_memory(xen_dmod, xen_domid, size, start_addr, 461 phys_offset); 462 if (rc) { 463 int saved_errno = errno; 464 465 error_report("relocate_memory "RAM_ADDR_FMT" pages" 466 " from GFN %"HWADDR_PRIx 467 " to GFN %"HWADDR_PRIx" failed: %s", 468 size, start_addr, phys_offset, strerror(saved_errno)); 469 errno = saved_errno; 470 return -1; 471 } 472 473 QLIST_REMOVE(physmap, list); 474 if (state->log_for_dirtybit == physmap) { 475 state->log_for_dirtybit = NULL; 476 g_free(state->dirty_bitmap); 477 state->dirty_bitmap = NULL; 478 } 479 g_free(physmap); 480 481 return 0; 482 } 483 484 static void xen_set_memory(struct MemoryListener *listener, 485 MemoryRegionSection *section, 486 bool add) 487 { 488 XenIOState *state = container_of(listener, XenIOState, memory_listener); 489 hwaddr start_addr = section->offset_within_address_space; 490 ram_addr_t size = int128_get64(section->size); 491 bool log_dirty = memory_region_is_logging(section->mr, DIRTY_MEMORY_VGA); 492 hvmmem_type_t mem_type; 493 494 if (section->mr == &ram_memory) { 495 return; 496 } else { 497 if (add) { 498 xen_map_memory_section(xen_domid, state->ioservid, 499 section); 500 } else { 501 xen_unmap_memory_section(xen_domid, state->ioservid, 502 section); 503 } 504 } 505 506 if (!memory_region_is_ram(section->mr)) { 507 return; 508 } 509 510 if (log_dirty != add) { 511 return; 512 } 513 514 trace_xen_client_set_memory(start_addr, size, log_dirty); 515 516 start_addr &= TARGET_PAGE_MASK; 517 size = TARGET_PAGE_ALIGN(size); 518 519 if (add) { 520 if (!memory_region_is_rom(section->mr)) { 521 xen_add_to_physmap(state, start_addr, size, 522 section->mr, section->offset_within_region); 523 } else { 524 mem_type = HVMMEM_ram_ro; 525 if (xen_set_mem_type(xen_domid, mem_type, 526 start_addr >> TARGET_PAGE_BITS, 527 size >> TARGET_PAGE_BITS)) { 528 DPRINTF("xen_set_mem_type error, addr: "TARGET_FMT_plx"\n", 529 start_addr); 530 } 531 } 532 } else { 533 if (xen_remove_from_physmap(state, start_addr, size) < 0) { 534 DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr); 535 } 536 } 537 } 538 539 static void xen_region_add(MemoryListener *listener, 540 MemoryRegionSection *section) 541 { 542 memory_region_ref(section->mr); 543 xen_set_memory(listener, section, true); 544 } 545 546 static void xen_region_del(MemoryListener *listener, 547 MemoryRegionSection *section) 548 { 549 xen_set_memory(listener, section, false); 550 memory_region_unref(section->mr); 551 } 552 553 static void xen_io_add(MemoryListener *listener, 554 MemoryRegionSection *section) 555 { 556 XenIOState *state = container_of(listener, XenIOState, io_listener); 557 MemoryRegion *mr = section->mr; 558 559 if (mr->ops == &unassigned_io_ops) { 560 return; 561 } 562 563 memory_region_ref(mr); 564 565 xen_map_io_section(xen_domid, state->ioservid, section); 566 } 567 568 static void xen_io_del(MemoryListener *listener, 569 MemoryRegionSection *section) 570 { 571 XenIOState *state = container_of(listener, XenIOState, io_listener); 572 MemoryRegion *mr = section->mr; 573 574 if (mr->ops == &unassigned_io_ops) { 575 return; 576 } 577 578 xen_unmap_io_section(xen_domid, state->ioservid, section); 579 580 memory_region_unref(mr); 581 } 582 583 static void xen_device_realize(DeviceListener *listener, 584 DeviceState *dev) 585 { 586 XenIOState *state = container_of(listener, XenIOState, device_listener); 587 588 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 589 PCIDevice *pci_dev = PCI_DEVICE(dev); 590 XenPciDevice *xendev = g_new(XenPciDevice, 1); 591 592 xendev->pci_dev = pci_dev; 593 xendev->sbdf = PCI_BUILD_BDF(pci_dev_bus_num(pci_dev), 594 pci_dev->devfn); 595 QLIST_INSERT_HEAD(&state->dev_list, xendev, entry); 596 597 xen_map_pcidev(xen_domid, state->ioservid, pci_dev); 598 } 599 } 600 601 static void xen_device_unrealize(DeviceListener *listener, 602 DeviceState *dev) 603 { 604 XenIOState *state = container_of(listener, XenIOState, device_listener); 605 606 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 607 PCIDevice *pci_dev = PCI_DEVICE(dev); 608 XenPciDevice *xendev, *next; 609 610 xen_unmap_pcidev(xen_domid, state->ioservid, pci_dev); 611 612 QLIST_FOREACH_SAFE(xendev, &state->dev_list, entry, next) { 613 if (xendev->pci_dev == pci_dev) { 614 QLIST_REMOVE(xendev, entry); 615 g_free(xendev); 616 break; 617 } 618 } 619 } 620 } 621 622 static void xen_sync_dirty_bitmap(XenIOState *state, 623 hwaddr start_addr, 624 ram_addr_t size) 625 { 626 hwaddr npages = size >> TARGET_PAGE_BITS; 627 const int width = sizeof(unsigned long) * 8; 628 size_t bitmap_size = DIV_ROUND_UP(npages, width); 629 int rc, i, j; 630 const XenPhysmap *physmap = NULL; 631 632 physmap = get_physmapping(start_addr, size); 633 if (physmap == NULL) { 634 /* not handled */ 635 return; 636 } 637 638 if (state->log_for_dirtybit == NULL) { 639 state->log_for_dirtybit = physmap; 640 state->dirty_bitmap = g_new(unsigned long, bitmap_size); 641 } else if (state->log_for_dirtybit != physmap) { 642 /* Only one range for dirty bitmap can be tracked. */ 643 return; 644 } 645 646 rc = xen_track_dirty_vram(xen_domid, start_addr >> TARGET_PAGE_BITS, 647 npages, state->dirty_bitmap); 648 if (rc < 0) { 649 #ifndef ENODATA 650 #define ENODATA ENOENT 651 #endif 652 if (errno == ENODATA) { 653 memory_region_set_dirty(framebuffer, 0, size); 654 DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx 655 ", 0x" TARGET_FMT_plx "): %s\n", 656 start_addr, start_addr + size, strerror(errno)); 657 } 658 return; 659 } 660 661 for (i = 0; i < bitmap_size; i++) { 662 unsigned long map = state->dirty_bitmap[i]; 663 while (map != 0) { 664 j = ctzl(map); 665 map &= ~(1ul << j); 666 memory_region_set_dirty(framebuffer, 667 (i * width + j) * TARGET_PAGE_SIZE, 668 TARGET_PAGE_SIZE); 669 }; 670 } 671 } 672 673 static void xen_log_start(MemoryListener *listener, 674 MemoryRegionSection *section, 675 int old, int new) 676 { 677 XenIOState *state = container_of(listener, XenIOState, memory_listener); 678 679 if (new & ~old & (1 << DIRTY_MEMORY_VGA)) { 680 xen_sync_dirty_bitmap(state, section->offset_within_address_space, 681 int128_get64(section->size)); 682 } 683 } 684 685 static void xen_log_stop(MemoryListener *listener, MemoryRegionSection *section, 686 int old, int new) 687 { 688 XenIOState *state = container_of(listener, XenIOState, memory_listener); 689 690 if (old & ~new & (1 << DIRTY_MEMORY_VGA)) { 691 state->log_for_dirtybit = NULL; 692 g_free(state->dirty_bitmap); 693 state->dirty_bitmap = NULL; 694 /* Disable dirty bit tracking */ 695 xen_track_dirty_vram(xen_domid, 0, 0, NULL); 696 } 697 } 698 699 static void xen_log_sync(MemoryListener *listener, MemoryRegionSection *section) 700 { 701 XenIOState *state = container_of(listener, XenIOState, memory_listener); 702 703 xen_sync_dirty_bitmap(state, section->offset_within_address_space, 704 int128_get64(section->size)); 705 } 706 707 static void xen_log_global_start(MemoryListener *listener) 708 { 709 if (xen_enabled()) { 710 xen_in_migration = true; 711 } 712 } 713 714 static void xen_log_global_stop(MemoryListener *listener) 715 { 716 xen_in_migration = false; 717 } 718 719 static MemoryListener xen_memory_listener = { 720 .region_add = xen_region_add, 721 .region_del = xen_region_del, 722 .log_start = xen_log_start, 723 .log_stop = xen_log_stop, 724 .log_sync = xen_log_sync, 725 .log_global_start = xen_log_global_start, 726 .log_global_stop = xen_log_global_stop, 727 .priority = 10, 728 }; 729 730 static MemoryListener xen_io_listener = { 731 .region_add = xen_io_add, 732 .region_del = xen_io_del, 733 .priority = 10, 734 }; 735 736 static DeviceListener xen_device_listener = { 737 .realize = xen_device_realize, 738 .unrealize = xen_device_unrealize, 739 }; 740 741 /* get the ioreq packets from share mem */ 742 static ioreq_t *cpu_get_ioreq_from_shared_memory(XenIOState *state, int vcpu) 743 { 744 ioreq_t *req = xen_vcpu_ioreq(state->shared_page, vcpu); 745 746 if (req->state != STATE_IOREQ_READY) { 747 DPRINTF("I/O request not ready: " 748 "%x, ptr: %x, port: %"PRIx64", " 749 "data: %"PRIx64", count: %u, size: %u\n", 750 req->state, req->data_is_ptr, req->addr, 751 req->data, req->count, req->size); 752 return NULL; 753 } 754 755 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */ 756 757 req->state = STATE_IOREQ_INPROCESS; 758 return req; 759 } 760 761 /* use poll to get the port notification */ 762 /* ioreq_vec--out,the */ 763 /* retval--the number of ioreq packet */ 764 static ioreq_t *cpu_get_ioreq(XenIOState *state) 765 { 766 MachineState *ms = MACHINE(qdev_get_machine()); 767 unsigned int max_cpus = ms->smp.max_cpus; 768 int i; 769 evtchn_port_t port; 770 771 port = xenevtchn_pending(state->xce_handle); 772 if (port == state->bufioreq_local_port) { 773 timer_mod(state->buffered_io_timer, 774 BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); 775 return NULL; 776 } 777 778 if (port != -1) { 779 for (i = 0; i < max_cpus; i++) { 780 if (state->ioreq_local_port[i] == port) { 781 break; 782 } 783 } 784 785 if (i == max_cpus) { 786 hw_error("Fatal error while trying to get io event!\n"); 787 } 788 789 /* unmask the wanted port again */ 790 xenevtchn_unmask(state->xce_handle, port); 791 792 /* get the io packet from shared memory */ 793 state->send_vcpu = i; 794 return cpu_get_ioreq_from_shared_memory(state, i); 795 } 796 797 /* read error or read nothing */ 798 return NULL; 799 } 800 801 static uint32_t do_inp(uint32_t addr, unsigned long size) 802 { 803 switch (size) { 804 case 1: 805 return cpu_inb(addr); 806 case 2: 807 return cpu_inw(addr); 808 case 4: 809 return cpu_inl(addr); 810 default: 811 hw_error("inp: bad size: %04x %lx", addr, size); 812 } 813 } 814 815 static void do_outp(uint32_t addr, 816 unsigned long size, uint32_t val) 817 { 818 switch (size) { 819 case 1: 820 return cpu_outb(addr, val); 821 case 2: 822 return cpu_outw(addr, val); 823 case 4: 824 return cpu_outl(addr, val); 825 default: 826 hw_error("outp: bad size: %04x %lx", addr, size); 827 } 828 } 829 830 /* 831 * Helper functions which read/write an object from/to physical guest 832 * memory, as part of the implementation of an ioreq. 833 * 834 * Equivalent to 835 * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i, 836 * val, req->size, 0/1) 837 * except without the integer overflow problems. 838 */ 839 static void rw_phys_req_item(hwaddr addr, 840 ioreq_t *req, uint32_t i, void *val, int rw) 841 { 842 /* Do everything unsigned so overflow just results in a truncated result 843 * and accesses to undesired parts of guest memory, which is up 844 * to the guest */ 845 hwaddr offset = (hwaddr)req->size * i; 846 if (req->df) { 847 addr -= offset; 848 } else { 849 addr += offset; 850 } 851 cpu_physical_memory_rw(addr, val, req->size, rw); 852 } 853 854 static inline void read_phys_req_item(hwaddr addr, 855 ioreq_t *req, uint32_t i, void *val) 856 { 857 rw_phys_req_item(addr, req, i, val, 0); 858 } 859 static inline void write_phys_req_item(hwaddr addr, 860 ioreq_t *req, uint32_t i, void *val) 861 { 862 rw_phys_req_item(addr, req, i, val, 1); 863 } 864 865 866 static void cpu_ioreq_pio(ioreq_t *req) 867 { 868 uint32_t i; 869 870 trace_cpu_ioreq_pio(req, req->dir, req->df, req->data_is_ptr, req->addr, 871 req->data, req->count, req->size); 872 873 if (req->size > sizeof(uint32_t)) { 874 hw_error("PIO: bad size (%u)", req->size); 875 } 876 877 if (req->dir == IOREQ_READ) { 878 if (!req->data_is_ptr) { 879 req->data = do_inp(req->addr, req->size); 880 trace_cpu_ioreq_pio_read_reg(req, req->data, req->addr, 881 req->size); 882 } else { 883 uint32_t tmp; 884 885 for (i = 0; i < req->count; i++) { 886 tmp = do_inp(req->addr, req->size); 887 write_phys_req_item(req->data, req, i, &tmp); 888 } 889 } 890 } else if (req->dir == IOREQ_WRITE) { 891 if (!req->data_is_ptr) { 892 trace_cpu_ioreq_pio_write_reg(req, req->data, req->addr, 893 req->size); 894 do_outp(req->addr, req->size, req->data); 895 } else { 896 for (i = 0; i < req->count; i++) { 897 uint32_t tmp = 0; 898 899 read_phys_req_item(req->data, req, i, &tmp); 900 do_outp(req->addr, req->size, tmp); 901 } 902 } 903 } 904 } 905 906 static void cpu_ioreq_move(ioreq_t *req) 907 { 908 uint32_t i; 909 910 trace_cpu_ioreq_move(req, req->dir, req->df, req->data_is_ptr, req->addr, 911 req->data, req->count, req->size); 912 913 if (req->size > sizeof(req->data)) { 914 hw_error("MMIO: bad size (%u)", req->size); 915 } 916 917 if (!req->data_is_ptr) { 918 if (req->dir == IOREQ_READ) { 919 for (i = 0; i < req->count; i++) { 920 read_phys_req_item(req->addr, req, i, &req->data); 921 } 922 } else if (req->dir == IOREQ_WRITE) { 923 for (i = 0; i < req->count; i++) { 924 write_phys_req_item(req->addr, req, i, &req->data); 925 } 926 } 927 } else { 928 uint64_t tmp; 929 930 if (req->dir == IOREQ_READ) { 931 for (i = 0; i < req->count; i++) { 932 read_phys_req_item(req->addr, req, i, &tmp); 933 write_phys_req_item(req->data, req, i, &tmp); 934 } 935 } else if (req->dir == IOREQ_WRITE) { 936 for (i = 0; i < req->count; i++) { 937 read_phys_req_item(req->data, req, i, &tmp); 938 write_phys_req_item(req->addr, req, i, &tmp); 939 } 940 } 941 } 942 } 943 944 static void cpu_ioreq_config(XenIOState *state, ioreq_t *req) 945 { 946 uint32_t sbdf = req->addr >> 32; 947 uint32_t reg = req->addr; 948 XenPciDevice *xendev; 949 950 if (req->size != sizeof(uint8_t) && req->size != sizeof(uint16_t) && 951 req->size != sizeof(uint32_t)) { 952 hw_error("PCI config access: bad size (%u)", req->size); 953 } 954 955 if (req->count != 1) { 956 hw_error("PCI config access: bad count (%u)", req->count); 957 } 958 959 QLIST_FOREACH(xendev, &state->dev_list, entry) { 960 if (xendev->sbdf != sbdf) { 961 continue; 962 } 963 964 if (!req->data_is_ptr) { 965 if (req->dir == IOREQ_READ) { 966 req->data = 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, req->data); 971 } else if (req->dir == IOREQ_WRITE) { 972 trace_cpu_ioreq_config_write(req, xendev->sbdf, reg, 973 req->size, req->data); 974 pci_host_config_write_common( 975 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 976 req->data, req->size); 977 } 978 } else { 979 uint32_t tmp; 980 981 if (req->dir == IOREQ_READ) { 982 tmp = pci_host_config_read_common( 983 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 984 req->size); 985 trace_cpu_ioreq_config_read(req, xendev->sbdf, reg, 986 req->size, tmp); 987 write_phys_req_item(req->data, req, 0, &tmp); 988 } else if (req->dir == IOREQ_WRITE) { 989 read_phys_req_item(req->data, req, 0, &tmp); 990 trace_cpu_ioreq_config_write(req, xendev->sbdf, reg, 991 req->size, tmp); 992 pci_host_config_write_common( 993 xendev->pci_dev, reg, PCI_CONFIG_SPACE_SIZE, 994 tmp, req->size); 995 } 996 } 997 } 998 } 999 1000 static void regs_to_cpu(vmware_regs_t *vmport_regs, ioreq_t *req) 1001 { 1002 X86CPU *cpu; 1003 CPUX86State *env; 1004 1005 cpu = X86_CPU(current_cpu); 1006 env = &cpu->env; 1007 env->regs[R_EAX] = req->data; 1008 env->regs[R_EBX] = vmport_regs->ebx; 1009 env->regs[R_ECX] = vmport_regs->ecx; 1010 env->regs[R_EDX] = vmport_regs->edx; 1011 env->regs[R_ESI] = vmport_regs->esi; 1012 env->regs[R_EDI] = vmport_regs->edi; 1013 } 1014 1015 static void regs_from_cpu(vmware_regs_t *vmport_regs) 1016 { 1017 X86CPU *cpu = X86_CPU(current_cpu); 1018 CPUX86State *env = &cpu->env; 1019 1020 vmport_regs->ebx = env->regs[R_EBX]; 1021 vmport_regs->ecx = env->regs[R_ECX]; 1022 vmport_regs->edx = env->regs[R_EDX]; 1023 vmport_regs->esi = env->regs[R_ESI]; 1024 vmport_regs->edi = env->regs[R_EDI]; 1025 } 1026 1027 static void handle_vmport_ioreq(XenIOState *state, ioreq_t *req) 1028 { 1029 vmware_regs_t *vmport_regs; 1030 1031 assert(state->shared_vmport_page); 1032 vmport_regs = 1033 &state->shared_vmport_page->vcpu_vmport_regs[state->send_vcpu]; 1034 QEMU_BUILD_BUG_ON(sizeof(*req) < sizeof(*vmport_regs)); 1035 1036 current_cpu = state->cpu_by_vcpu_id[state->send_vcpu]; 1037 regs_to_cpu(vmport_regs, req); 1038 cpu_ioreq_pio(req); 1039 regs_from_cpu(vmport_regs); 1040 current_cpu = NULL; 1041 } 1042 1043 static void handle_ioreq(XenIOState *state, ioreq_t *req) 1044 { 1045 trace_handle_ioreq(req, req->type, req->dir, req->df, req->data_is_ptr, 1046 req->addr, req->data, req->count, req->size); 1047 1048 if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) && 1049 (req->size < sizeof (target_ulong))) { 1050 req->data &= ((target_ulong) 1 << (8 * req->size)) - 1; 1051 } 1052 1053 if (req->dir == IOREQ_WRITE) 1054 trace_handle_ioreq_write(req, req->type, req->df, req->data_is_ptr, 1055 req->addr, req->data, req->count, req->size); 1056 1057 switch (req->type) { 1058 case IOREQ_TYPE_PIO: 1059 cpu_ioreq_pio(req); 1060 break; 1061 case IOREQ_TYPE_COPY: 1062 cpu_ioreq_move(req); 1063 break; 1064 case IOREQ_TYPE_VMWARE_PORT: 1065 handle_vmport_ioreq(state, req); 1066 break; 1067 case IOREQ_TYPE_TIMEOFFSET: 1068 break; 1069 case IOREQ_TYPE_INVALIDATE: 1070 xen_invalidate_map_cache(); 1071 break; 1072 case IOREQ_TYPE_PCI_CONFIG: 1073 cpu_ioreq_config(state, req); 1074 break; 1075 default: 1076 hw_error("Invalid ioreq type 0x%x\n", req->type); 1077 } 1078 if (req->dir == IOREQ_READ) { 1079 trace_handle_ioreq_read(req, req->type, req->df, req->data_is_ptr, 1080 req->addr, req->data, req->count, req->size); 1081 } 1082 } 1083 1084 static int handle_buffered_iopage(XenIOState *state) 1085 { 1086 buffered_iopage_t *buf_page = state->buffered_io_page; 1087 buf_ioreq_t *buf_req = NULL; 1088 ioreq_t req; 1089 int qw; 1090 1091 if (!buf_page) { 1092 return 0; 1093 } 1094 1095 memset(&req, 0x00, sizeof(req)); 1096 req.state = STATE_IOREQ_READY; 1097 req.count = 1; 1098 req.dir = IOREQ_WRITE; 1099 1100 for (;;) { 1101 uint32_t rdptr = buf_page->read_pointer, wrptr; 1102 1103 xen_rmb(); 1104 wrptr = buf_page->write_pointer; 1105 xen_rmb(); 1106 if (rdptr != buf_page->read_pointer) { 1107 continue; 1108 } 1109 if (rdptr == wrptr) { 1110 break; 1111 } 1112 buf_req = &buf_page->buf_ioreq[rdptr % IOREQ_BUFFER_SLOT_NUM]; 1113 req.size = 1U << buf_req->size; 1114 req.addr = buf_req->addr; 1115 req.data = buf_req->data; 1116 req.type = buf_req->type; 1117 xen_rmb(); 1118 qw = (req.size == 8); 1119 if (qw) { 1120 if (rdptr + 1 == wrptr) { 1121 hw_error("Incomplete quad word buffered ioreq"); 1122 } 1123 buf_req = &buf_page->buf_ioreq[(rdptr + 1) % 1124 IOREQ_BUFFER_SLOT_NUM]; 1125 req.data |= ((uint64_t)buf_req->data) << 32; 1126 xen_rmb(); 1127 } 1128 1129 handle_ioreq(state, &req); 1130 1131 /* Only req.data may get updated by handle_ioreq(), albeit even that 1132 * should not happen as such data would never make it to the guest (we 1133 * can only usefully see writes here after all). 1134 */ 1135 assert(req.state == STATE_IOREQ_READY); 1136 assert(req.count == 1); 1137 assert(req.dir == IOREQ_WRITE); 1138 assert(!req.data_is_ptr); 1139 1140 atomic_add(&buf_page->read_pointer, qw + 1); 1141 } 1142 1143 return req.count; 1144 } 1145 1146 static void handle_buffered_io(void *opaque) 1147 { 1148 XenIOState *state = opaque; 1149 1150 if (handle_buffered_iopage(state)) { 1151 timer_mod(state->buffered_io_timer, 1152 BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); 1153 } else { 1154 timer_del(state->buffered_io_timer); 1155 xenevtchn_unmask(state->xce_handle, state->bufioreq_local_port); 1156 } 1157 } 1158 1159 static void cpu_handle_ioreq(void *opaque) 1160 { 1161 XenIOState *state = opaque; 1162 ioreq_t *req = cpu_get_ioreq(state); 1163 1164 handle_buffered_iopage(state); 1165 if (req) { 1166 ioreq_t copy = *req; 1167 1168 xen_rmb(); 1169 handle_ioreq(state, ©); 1170 req->data = copy.data; 1171 1172 if (req->state != STATE_IOREQ_INPROCESS) { 1173 fprintf(stderr, "Badness in I/O request ... not in service?!: " 1174 "%x, ptr: %x, port: %"PRIx64", " 1175 "data: %"PRIx64", count: %u, size: %u, type: %u\n", 1176 req->state, req->data_is_ptr, req->addr, 1177 req->data, req->count, req->size, req->type); 1178 destroy_hvm_domain(false); 1179 return; 1180 } 1181 1182 xen_wmb(); /* Update ioreq contents /then/ update state. */ 1183 1184 /* 1185 * We do this before we send the response so that the tools 1186 * have the opportunity to pick up on the reset before the 1187 * guest resumes and does a hlt with interrupts disabled which 1188 * causes Xen to powerdown the domain. 1189 */ 1190 if (runstate_is_running()) { 1191 ShutdownCause request; 1192 1193 if (qemu_shutdown_requested_get()) { 1194 destroy_hvm_domain(false); 1195 } 1196 request = qemu_reset_requested_get(); 1197 if (request) { 1198 qemu_system_reset(request); 1199 destroy_hvm_domain(true); 1200 } 1201 } 1202 1203 req->state = STATE_IORESP_READY; 1204 xenevtchn_notify(state->xce_handle, 1205 state->ioreq_local_port[state->send_vcpu]); 1206 } 1207 } 1208 1209 static void xen_main_loop_prepare(XenIOState *state) 1210 { 1211 int evtchn_fd = -1; 1212 1213 if (state->xce_handle != NULL) { 1214 evtchn_fd = xenevtchn_fd(state->xce_handle); 1215 } 1216 1217 state->buffered_io_timer = timer_new_ms(QEMU_CLOCK_REALTIME, handle_buffered_io, 1218 state); 1219 1220 if (evtchn_fd != -1) { 1221 CPUState *cpu_state; 1222 1223 DPRINTF("%s: Init cpu_by_vcpu_id\n", __func__); 1224 CPU_FOREACH(cpu_state) { 1225 DPRINTF("%s: cpu_by_vcpu_id[%d]=%p\n", 1226 __func__, cpu_state->cpu_index, cpu_state); 1227 state->cpu_by_vcpu_id[cpu_state->cpu_index] = cpu_state; 1228 } 1229 qemu_set_fd_handler(evtchn_fd, cpu_handle_ioreq, NULL, state); 1230 } 1231 } 1232 1233 1234 static void xen_hvm_change_state_handler(void *opaque, int running, 1235 RunState rstate) 1236 { 1237 XenIOState *state = opaque; 1238 1239 if (running) { 1240 xen_main_loop_prepare(state); 1241 } 1242 1243 xen_set_ioreq_server_state(xen_domid, 1244 state->ioservid, 1245 (rstate == RUN_STATE_RUNNING)); 1246 } 1247 1248 static void xen_exit_notifier(Notifier *n, void *data) 1249 { 1250 XenIOState *state = container_of(n, XenIOState, exit); 1251 1252 xen_destroy_ioreq_server(xen_domid, state->ioservid); 1253 1254 xenevtchn_close(state->xce_handle); 1255 xs_daemon_close(state->xenstore); 1256 } 1257 1258 #ifdef XEN_COMPAT_PHYSMAP 1259 static void xen_read_physmap(XenIOState *state) 1260 { 1261 XenPhysmap *physmap = NULL; 1262 unsigned int len, num, i; 1263 char path[80], *value = NULL; 1264 char **entries = NULL; 1265 1266 snprintf(path, sizeof(path), 1267 "/local/domain/0/device-model/%d/physmap", xen_domid); 1268 entries = xs_directory(state->xenstore, 0, path, &num); 1269 if (entries == NULL) 1270 return; 1271 1272 for (i = 0; i < num; i++) { 1273 physmap = g_malloc(sizeof (XenPhysmap)); 1274 physmap->phys_offset = strtoull(entries[i], NULL, 16); 1275 snprintf(path, sizeof(path), 1276 "/local/domain/0/device-model/%d/physmap/%s/start_addr", 1277 xen_domid, entries[i]); 1278 value = xs_read(state->xenstore, 0, path, &len); 1279 if (value == NULL) { 1280 g_free(physmap); 1281 continue; 1282 } 1283 physmap->start_addr = strtoull(value, NULL, 16); 1284 free(value); 1285 1286 snprintf(path, sizeof(path), 1287 "/local/domain/0/device-model/%d/physmap/%s/size", 1288 xen_domid, entries[i]); 1289 value = xs_read(state->xenstore, 0, path, &len); 1290 if (value == NULL) { 1291 g_free(physmap); 1292 continue; 1293 } 1294 physmap->size = strtoull(value, NULL, 16); 1295 free(value); 1296 1297 snprintf(path, sizeof(path), 1298 "/local/domain/0/device-model/%d/physmap/%s/name", 1299 xen_domid, entries[i]); 1300 physmap->name = xs_read(state->xenstore, 0, path, &len); 1301 1302 QLIST_INSERT_HEAD(&xen_physmap, physmap, list); 1303 } 1304 free(entries); 1305 } 1306 #else 1307 static void xen_read_physmap(XenIOState *state) 1308 { 1309 } 1310 #endif 1311 1312 static void xen_wakeup_notifier(Notifier *notifier, void *data) 1313 { 1314 xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 0); 1315 } 1316 1317 static int xen_map_ioreq_server(XenIOState *state) 1318 { 1319 void *addr = NULL; 1320 xenforeignmemory_resource_handle *fres; 1321 xen_pfn_t ioreq_pfn; 1322 xen_pfn_t bufioreq_pfn; 1323 evtchn_port_t bufioreq_evtchn; 1324 int rc; 1325 1326 /* 1327 * Attempt to map using the resource API and fall back to normal 1328 * foreign mapping if this is not supported. 1329 */ 1330 QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_bufioreq != 0); 1331 QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_ioreq(0) != 1); 1332 fres = xenforeignmemory_map_resource(xen_fmem, xen_domid, 1333 XENMEM_resource_ioreq_server, 1334 state->ioservid, 0, 2, 1335 &addr, 1336 PROT_READ | PROT_WRITE, 0); 1337 if (fres != NULL) { 1338 trace_xen_map_resource_ioreq(state->ioservid, addr); 1339 state->buffered_io_page = addr; 1340 state->shared_page = addr + TARGET_PAGE_SIZE; 1341 } else if (errno != EOPNOTSUPP) { 1342 error_report("failed to map ioreq server resources: error %d handle=%p", 1343 errno, xen_xc); 1344 return -1; 1345 } 1346 1347 rc = xen_get_ioreq_server_info(xen_domid, state->ioservid, 1348 (state->shared_page == NULL) ? 1349 &ioreq_pfn : NULL, 1350 (state->buffered_io_page == NULL) ? 1351 &bufioreq_pfn : NULL, 1352 &bufioreq_evtchn); 1353 if (rc < 0) { 1354 error_report("failed to get ioreq server info: error %d handle=%p", 1355 errno, xen_xc); 1356 return rc; 1357 } 1358 1359 if (state->shared_page == NULL) { 1360 DPRINTF("shared page at pfn %lx\n", ioreq_pfn); 1361 1362 state->shared_page = xenforeignmemory_map(xen_fmem, xen_domid, 1363 PROT_READ | PROT_WRITE, 1364 1, &ioreq_pfn, NULL); 1365 if (state->shared_page == NULL) { 1366 error_report("map shared IO page returned error %d handle=%p", 1367 errno, xen_xc); 1368 } 1369 } 1370 1371 if (state->buffered_io_page == NULL) { 1372 DPRINTF("buffered io page at pfn %lx\n", bufioreq_pfn); 1373 1374 state->buffered_io_page = xenforeignmemory_map(xen_fmem, xen_domid, 1375 PROT_READ | PROT_WRITE, 1376 1, &bufioreq_pfn, 1377 NULL); 1378 if (state->buffered_io_page == NULL) { 1379 error_report("map buffered IO page returned error %d", errno); 1380 return -1; 1381 } 1382 } 1383 1384 if (state->shared_page == NULL || state->buffered_io_page == NULL) { 1385 return -1; 1386 } 1387 1388 DPRINTF("buffered io evtchn is %x\n", bufioreq_evtchn); 1389 1390 state->bufioreq_remote_port = bufioreq_evtchn; 1391 1392 return 0; 1393 } 1394 1395 void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory) 1396 { 1397 MachineState *ms = MACHINE(pcms); 1398 unsigned int max_cpus = ms->smp.max_cpus; 1399 int i, rc; 1400 xen_pfn_t ioreq_pfn; 1401 XenIOState *state; 1402 1403 state = g_malloc0(sizeof (XenIOState)); 1404 1405 state->xce_handle = xenevtchn_open(NULL, 0); 1406 if (state->xce_handle == NULL) { 1407 perror("xen: event channel open"); 1408 goto err; 1409 } 1410 1411 state->xenstore = xs_daemon_open(); 1412 if (state->xenstore == NULL) { 1413 perror("xen: xenstore open"); 1414 goto err; 1415 } 1416 1417 xen_create_ioreq_server(xen_domid, &state->ioservid); 1418 1419 state->exit.notify = xen_exit_notifier; 1420 qemu_add_exit_notifier(&state->exit); 1421 1422 state->suspend.notify = xen_suspend_notifier; 1423 qemu_register_suspend_notifier(&state->suspend); 1424 1425 state->wakeup.notify = xen_wakeup_notifier; 1426 qemu_register_wakeup_notifier(&state->wakeup); 1427 1428 /* 1429 * Register wake-up support in QMP query-current-machine API 1430 */ 1431 qemu_register_wakeup_support(); 1432 1433 rc = xen_map_ioreq_server(state); 1434 if (rc < 0) { 1435 goto err; 1436 } 1437 1438 rc = xen_get_vmport_regs_pfn(xen_xc, xen_domid, &ioreq_pfn); 1439 if (!rc) { 1440 DPRINTF("shared vmport page at pfn %lx\n", ioreq_pfn); 1441 state->shared_vmport_page = 1442 xenforeignmemory_map(xen_fmem, xen_domid, PROT_READ|PROT_WRITE, 1443 1, &ioreq_pfn, NULL); 1444 if (state->shared_vmport_page == NULL) { 1445 error_report("map shared vmport IO page returned error %d handle=%p", 1446 errno, xen_xc); 1447 goto err; 1448 } 1449 } else if (rc != -ENOSYS) { 1450 error_report("get vmport regs pfn returned error %d, rc=%d", 1451 errno, rc); 1452 goto err; 1453 } 1454 1455 /* Note: cpus is empty at this point in init */ 1456 state->cpu_by_vcpu_id = g_malloc0(max_cpus * sizeof(CPUState *)); 1457 1458 rc = xen_set_ioreq_server_state(xen_domid, state->ioservid, true); 1459 if (rc < 0) { 1460 error_report("failed to enable ioreq server info: error %d handle=%p", 1461 errno, xen_xc); 1462 goto err; 1463 } 1464 1465 state->ioreq_local_port = g_malloc0(max_cpus * sizeof (evtchn_port_t)); 1466 1467 /* FIXME: how about if we overflow the page here? */ 1468 for (i = 0; i < max_cpus; i++) { 1469 rc = xenevtchn_bind_interdomain(state->xce_handle, xen_domid, 1470 xen_vcpu_eport(state->shared_page, i)); 1471 if (rc == -1) { 1472 error_report("shared evtchn %d bind error %d", i, errno); 1473 goto err; 1474 } 1475 state->ioreq_local_port[i] = rc; 1476 } 1477 1478 rc = xenevtchn_bind_interdomain(state->xce_handle, xen_domid, 1479 state->bufioreq_remote_port); 1480 if (rc == -1) { 1481 error_report("buffered evtchn bind error %d", errno); 1482 goto err; 1483 } 1484 state->bufioreq_local_port = rc; 1485 1486 /* Init RAM management */ 1487 #ifdef XEN_COMPAT_PHYSMAP 1488 xen_map_cache_init(xen_phys_offset_to_gaddr, state); 1489 #else 1490 xen_map_cache_init(NULL, state); 1491 #endif 1492 xen_ram_init(pcms, ram_size, ram_memory); 1493 1494 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state); 1495 1496 state->memory_listener = xen_memory_listener; 1497 memory_listener_register(&state->memory_listener, &address_space_memory); 1498 state->log_for_dirtybit = NULL; 1499 1500 state->io_listener = xen_io_listener; 1501 memory_listener_register(&state->io_listener, &address_space_io); 1502 1503 state->device_listener = xen_device_listener; 1504 QLIST_INIT(&state->dev_list); 1505 device_listener_register(&state->device_listener); 1506 1507 xen_bus_init(); 1508 1509 /* Initialize backend core & drivers */ 1510 if (xen_be_init() != 0) { 1511 error_report("xen backend core setup failed"); 1512 goto err; 1513 } 1514 xen_be_register_common(); 1515 1516 QLIST_INIT(&xen_physmap); 1517 xen_read_physmap(state); 1518 1519 /* Disable ACPI build because Xen handles it */ 1520 pcms->acpi_build_enabled = false; 1521 1522 return; 1523 1524 err: 1525 error_report("xen hardware virtual machine initialisation failed"); 1526 exit(1); 1527 } 1528 1529 void destroy_hvm_domain(bool reboot) 1530 { 1531 xc_interface *xc_handle; 1532 int sts; 1533 int rc; 1534 1535 unsigned int reason = reboot ? SHUTDOWN_reboot : SHUTDOWN_poweroff; 1536 1537 if (xen_dmod) { 1538 rc = xendevicemodel_shutdown(xen_dmod, xen_domid, reason); 1539 if (!rc) { 1540 return; 1541 } 1542 if (errno != ENOTTY /* old Xen */) { 1543 perror("xendevicemodel_shutdown failed"); 1544 } 1545 /* well, try the old thing then */ 1546 } 1547 1548 xc_handle = xc_interface_open(0, 0, 0); 1549 if (xc_handle == NULL) { 1550 fprintf(stderr, "Cannot acquire xenctrl handle\n"); 1551 } else { 1552 sts = xc_domain_shutdown(xc_handle, xen_domid, reason); 1553 if (sts != 0) { 1554 fprintf(stderr, "xc_domain_shutdown failed to issue %s, " 1555 "sts %d, %s\n", reboot ? "reboot" : "poweroff", 1556 sts, strerror(errno)); 1557 } else { 1558 fprintf(stderr, "Issued domain %d %s\n", xen_domid, 1559 reboot ? "reboot" : "poweroff"); 1560 } 1561 xc_interface_close(xc_handle); 1562 } 1563 } 1564 1565 void xen_register_framebuffer(MemoryRegion *mr) 1566 { 1567 framebuffer = mr; 1568 } 1569 1570 void xen_shutdown_fatal_error(const char *fmt, ...) 1571 { 1572 va_list ap; 1573 1574 va_start(ap, fmt); 1575 vfprintf(stderr, fmt, ap); 1576 va_end(ap); 1577 fprintf(stderr, "Will destroy the domain.\n"); 1578 /* destroy the domain */ 1579 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_ERROR); 1580 } 1581 1582 void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length) 1583 { 1584 if (unlikely(xen_in_migration)) { 1585 int rc; 1586 ram_addr_t start_pfn, nb_pages; 1587 1588 start = xen_phys_offset_to_gaddr(start, length); 1589 1590 if (length == 0) { 1591 length = TARGET_PAGE_SIZE; 1592 } 1593 start_pfn = start >> TARGET_PAGE_BITS; 1594 nb_pages = ((start + length + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS) 1595 - start_pfn; 1596 rc = xen_modified_memory(xen_domid, start_pfn, nb_pages); 1597 if (rc) { 1598 fprintf(stderr, 1599 "%s failed for "RAM_ADDR_FMT" ("RAM_ADDR_FMT"): %i, %s\n", 1600 __func__, start, nb_pages, errno, strerror(errno)); 1601 } 1602 } 1603 } 1604 1605 void qmp_xen_set_global_dirty_log(bool enable, Error **errp) 1606 { 1607 if (enable) { 1608 memory_global_dirty_log_start(); 1609 } else { 1610 memory_global_dirty_log_stop(); 1611 } 1612 } 1613