| 1 | /* |
| 2 | * XEN platform pci device, formerly known as the event channel device |
| 3 | * |
| 4 | * Copyright (c) 2003-2004 Intel Corp. |
| 5 | * Copyright (c) 2006 XenSource |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | * of this software and associated documentation files (the "Software"), to deal |
| 9 | * in the Software without restriction, including without limitation the rights |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | * copies of the Software, and to permit persons to whom the Software is |
| 12 | * furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included in |
| 15 | * all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 23 | * THE SOFTWARE. |
| 24 | */ |
| 25 | |
| 26 | #include "qemu/osdep.h" |
| 27 | #include "qapi/error.h" |
| 28 | #include "hw/ide/pci.h" |
| 29 | #include "hw/pci/pci.h" |
| 30 | #include "migration/vmstate.h" |
| 31 | #include "net/net.h" |
| 32 | #include "trace.h" |
| 33 | #include "system/xen.h" |
| 34 | #include "system/block-backend.h" |
| 35 | #include "qemu/error-report.h" |
| 36 | #include "qemu/module.h" |
| 37 | #include "qom/object.h" |
| 38 | |
| 39 | #ifdef CONFIG_XEN |
| 40 | #include "hw/xen/xen_native.h" |
| 41 | #endif |
| 42 | |
| 43 | /* The rule is that xen_native.h must come first */ |
| 44 | #include "hw/xen/xen.h" |
| 45 | |
| 46 | //#define DEBUG_PLATFORM |
| 47 | |
| 48 | #ifdef DEBUG_PLATFORM |
| 49 | #define DPRINTF(fmt, ...) do { \ |
| 50 | fprintf(stderr, "xen_platform: " fmt, ## __VA_ARGS__); \ |
| 51 | } while (0) |
| 52 | #else |
| 53 | #define DPRINTF(fmt, ...) do { } while (0) |
| 54 | #endif |
| 55 | |
| 56 | #define PFFLAG_ROM_LOCK 1 /* Sets whether ROM memory area is RW or RO */ |
| 57 | |
| 58 | struct PCIXenPlatformState { |
| 59 | /*< private >*/ |
| 60 | PCIDevice parent_obj; |
| 61 | /*< public >*/ |
| 62 | |
| 63 | MemoryRegion fixed_io; |
| 64 | MemoryRegion bar; |
| 65 | MemoryRegion mmio_bar; |
| 66 | uint8_t flags; /* used only for version_id == 2 */ |
| 67 | uint16_t driver_product_version; |
| 68 | |
| 69 | /* Log from guest drivers */ |
| 70 | char log_buffer[4096]; |
| 71 | int log_buffer_off; |
| 72 | }; |
| 73 | |
| 74 | #define TYPE_XEN_PLATFORM "xen-platform" |
| 75 | OBJECT_DECLARE_SIMPLE_TYPE(PCIXenPlatformState, XEN_PLATFORM) |
| 76 | |
| 77 | #define XEN_PLATFORM_IOPORT 0x10 |
| 78 | |
| 79 | /* Send bytes to syslog */ |
| 80 | static void log_writeb(PCIXenPlatformState *s, char val) |
| 81 | { |
| 82 | if (val == '\n' || s->log_buffer_off == sizeof(s->log_buffer) - 1) { |
| 83 | /* Flush buffer */ |
| 84 | s->log_buffer[s->log_buffer_off] = 0; |
| 85 | trace_xen_platform_log(s->log_buffer); |
| 86 | s->log_buffer_off = 0; |
| 87 | } else { |
| 88 | s->log_buffer[s->log_buffer_off++] = val; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * Unplug device flags. |
| 94 | * |
| 95 | * The logic got a little confused at some point in the past but this is |
| 96 | * what they do now. |
| 97 | * |
| 98 | * bit 0: Unplug all IDE and SCSI disks. |
| 99 | * bit 1: Unplug all NICs. |
| 100 | * bit 2: Unplug IDE disks except primary master. This is overridden if |
| 101 | * bit 0 is also present in the mask. |
| 102 | * bit 3: Unplug all NVMe disks. |
| 103 | * |
| 104 | */ |
| 105 | #define _UNPLUG_IDE_SCSI_DISKS 0 |
| 106 | #define UNPLUG_IDE_SCSI_DISKS (1u << _UNPLUG_IDE_SCSI_DISKS) |
| 107 | |
| 108 | #define _UNPLUG_ALL_NICS 1 |
| 109 | #define UNPLUG_ALL_NICS (1u << _UNPLUG_ALL_NICS) |
| 110 | |
| 111 | #define _UNPLUG_AUX_IDE_DISKS 2 |
| 112 | #define UNPLUG_AUX_IDE_DISKS (1u << _UNPLUG_AUX_IDE_DISKS) |
| 113 | |
| 114 | #define _UNPLUG_NVME_DISKS 3 |
| 115 | #define UNPLUG_NVME_DISKS (1u << _UNPLUG_NVME_DISKS) |
| 116 | |
| 117 | static bool pci_device_is_passthrough(PCIDevice *d) |
| 118 | { |
| 119 | if (!strcmp(d->name, "xen-pci-passthrough")) { |
| 120 | return true; |
| 121 | } |
| 122 | |
| 123 | if (xen_mode == XEN_EMULATE && !strcmp(d->name, "vfio-pci")) { |
| 124 | return true; |
| 125 | } |
| 126 | |
| 127 | return false; |
| 128 | } |
| 129 | |
| 130 | static void unplug_nic(PCIBus *b, PCIDevice *d, void *o) |
| 131 | { |
| 132 | /* We have to ignore passthrough devices */ |
| 133 | if (pci_get_word(d->config + PCI_CLASS_DEVICE) == |
| 134 | PCI_CLASS_NETWORK_ETHERNET |
| 135 | && !pci_device_is_passthrough(d)) { |
| 136 | object_unparent(OBJECT(d)); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /* Remove the peer of the NIC device. Normally, this would be a tap device. */ |
| 141 | static void del_nic_peer(NICState *nic, void *opaque) |
| 142 | { |
| 143 | NetClientState *nc = qemu_get_queue(nic); |
| 144 | ObjectClass *klass = module_object_class_by_name(nc->model); |
| 145 | |
| 146 | /* Only delete peers of PCI NICs that we're about to delete */ |
| 147 | if (!klass || !object_class_dynamic_cast(klass, TYPE_PCI_DEVICE)) { |
| 148 | return; |
| 149 | } |
| 150 | |
| 151 | if (nc->peer) |
| 152 | qemu_del_net_client(nc->peer); |
| 153 | } |
| 154 | |
| 155 | static void pci_unplug_nics(PCIBus *bus) |
| 156 | { |
| 157 | qemu_foreach_nic(del_nic_peer, NULL); |
| 158 | pci_for_each_device(bus, 0, unplug_nic, NULL); |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * The Xen HVM unplug protocol [1] specifies a mechanism to allow guests to |
| 163 | * request unplug of 'aux' disks (which is stated to mean all IDE disks, |
| 164 | * except the primary master). |
| 165 | * |
| 166 | * NOTE: The semantics of what happens if unplug of all disks and 'aux' disks |
| 167 | * is simultaneously requested is not clear. The implementation assumes |
| 168 | * that an 'all' request overrides an 'aux' request. |
| 169 | * |
| 170 | * [1] https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=docs/misc/hvm-emulated-unplug.pandoc |
| 171 | */ |
| 172 | struct ide_unplug_state { |
| 173 | bool aux; |
| 174 | int nr_unplugged; |
| 175 | }; |
| 176 | |
| 177 | static int ide_dev_unplug(DeviceState *dev, void *_st) |
| 178 | { |
| 179 | struct ide_unplug_state *st = _st; |
| 180 | IDEDevice *idedev; |
| 181 | IDEBus *idebus; |
| 182 | BlockBackend *blk; |
| 183 | int unit; |
| 184 | |
| 185 | idedev = IDE_DEVICE(object_dynamic_cast(OBJECT(dev), "ide-hd")); |
| 186 | if (!idedev) { |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | idebus = IDE_BUS(qdev_get_parent_bus(dev)); |
| 191 | |
| 192 | unit = (idedev == idebus->slave); |
| 193 | assert(unit || idedev == idebus->master); |
| 194 | |
| 195 | if (st->aux && !unit && !strcmp(BUS(idebus)->name, "ide.0")) { |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | blk = idebus->ifs[unit].blk; |
| 200 | if (blk) { |
| 201 | blk_drain(blk); |
| 202 | blk_flush(blk); |
| 203 | |
| 204 | blk_detach_dev(blk, DEVICE(idedev)); |
| 205 | idebus->ifs[unit].blk = NULL; |
| 206 | idedev->conf.blk = NULL; |
| 207 | monitor_remove_blk(blk); |
| 208 | blk_unref(blk); |
| 209 | } |
| 210 | |
| 211 | object_unparent(OBJECT(dev)); |
| 212 | st->nr_unplugged++; |
| 213 | |
| 214 | return 0; |
| 215 | } |
| 216 | |
| 217 | static void pci_xen_ide_unplug(PCIDevice *d, bool aux) |
| 218 | { |
| 219 | struct ide_unplug_state st = { aux, 0 }; |
| 220 | DeviceState *dev = DEVICE(d); |
| 221 | |
| 222 | qdev_walk_children(dev, NULL, NULL, ide_dev_unplug, NULL, &st); |
| 223 | if (st.nr_unplugged) { |
| 224 | pci_device_reset(d); |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | static void unplug_disks(PCIBus *b, PCIDevice *d, void *opaque) |
| 229 | { |
| 230 | uint32_t flags = *(uint32_t *)opaque; |
| 231 | bool aux = (flags & UNPLUG_AUX_IDE_DISKS) && |
| 232 | !(flags & UNPLUG_IDE_SCSI_DISKS); |
| 233 | |
| 234 | /* We have to ignore passthrough devices */ |
| 235 | if (pci_device_is_passthrough(d)) |
| 236 | return; |
| 237 | |
| 238 | switch (pci_get_word(d->config + PCI_CLASS_DEVICE)) { |
| 239 | case PCI_CLASS_STORAGE_IDE: |
| 240 | case PCI_CLASS_STORAGE_SATA: |
| 241 | pci_xen_ide_unplug(d, aux); |
| 242 | break; |
| 243 | |
| 244 | case PCI_CLASS_STORAGE_SCSI: |
| 245 | if (!aux) { |
| 246 | object_unparent(OBJECT(d)); |
| 247 | } |
| 248 | break; |
| 249 | |
| 250 | case PCI_CLASS_STORAGE_EXPRESS: |
| 251 | if (flags & UNPLUG_NVME_DISKS) { |
| 252 | object_unparent(OBJECT(d)); |
| 253 | } |
| 254 | |
| 255 | default: |
| 256 | break; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | static void pci_unplug_disks(PCIBus *bus, uint32_t flags) |
| 261 | { |
| 262 | pci_for_each_device(bus, 0, unplug_disks, &flags); |
| 263 | } |
| 264 | |
| 265 | static void platform_fixed_ioport_writew(void *opaque, uint32_t addr, uint32_t val) |
| 266 | { |
| 267 | PCIXenPlatformState *s = opaque; |
| 268 | |
| 269 | switch (addr) { |
| 270 | case 0: { |
| 271 | PCIDevice *pci_dev = PCI_DEVICE(s); |
| 272 | /* Unplug devices. See comment above flag definitions */ |
| 273 | if (val & (UNPLUG_IDE_SCSI_DISKS | UNPLUG_AUX_IDE_DISKS | |
| 274 | UNPLUG_NVME_DISKS)) { |
| 275 | DPRINTF("unplug disks\n"); |
| 276 | pci_unplug_disks(pci_get_bus(pci_dev), val); |
| 277 | } |
| 278 | if (val & UNPLUG_ALL_NICS) { |
| 279 | DPRINTF("unplug nics\n"); |
| 280 | pci_unplug_nics(pci_get_bus(pci_dev)); |
| 281 | } |
| 282 | break; |
| 283 | } |
| 284 | case 2: |
| 285 | switch (val) { |
| 286 | case 1: |
| 287 | DPRINTF("Citrix Windows PV drivers loaded in guest\n"); |
| 288 | break; |
| 289 | case 0: |
| 290 | DPRINTF("Guest claimed to be running PV product 0?\n"); |
| 291 | break; |
| 292 | default: |
| 293 | DPRINTF("Unknown PV product %d loaded in guest\n", val); |
| 294 | break; |
| 295 | } |
| 296 | s->driver_product_version = val; |
| 297 | break; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | static void platform_fixed_ioport_writel(void *opaque, uint32_t addr, |
| 302 | uint32_t val) |
| 303 | { |
| 304 | switch (addr) { |
| 305 | case 0: |
| 306 | /* PV driver version */ |
| 307 | break; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | static void platform_fixed_ioport_writeb(void *opaque, uint32_t addr, uint32_t val) |
| 312 | { |
| 313 | PCIXenPlatformState *s = opaque; |
| 314 | |
| 315 | switch (addr) { |
| 316 | case 0: /* Platform flags */ |
| 317 | if (xen_mode == XEN_EMULATE) { |
| 318 | /* XX: Use i440gx/q35 PAM setup to do this? */ |
| 319 | s->flags = val & PFFLAG_ROM_LOCK; |
| 320 | #ifdef CONFIG_XEN |
| 321 | } else { |
| 322 | hvmmem_type_t mem_type = (val & PFFLAG_ROM_LOCK) ? |
| 323 | HVMMEM_ram_ro : HVMMEM_ram_rw; |
| 324 | |
| 325 | if (xen_set_mem_type(xen_domid, mem_type, 0xc0, 0x40)) { |
| 326 | DPRINTF("unable to change ro/rw state of ROM memory area!\n"); |
| 327 | } else { |
| 328 | s->flags = val & PFFLAG_ROM_LOCK; |
| 329 | DPRINTF("changed ro/rw state of ROM memory area. now is %s state.\n", |
| 330 | (mem_type == HVMMEM_ram_ro ? "ro" : "rw")); |
| 331 | } |
| 332 | #endif |
| 333 | } |
| 334 | break; |
| 335 | |
| 336 | case 2: |
| 337 | log_writeb(s, val); |
| 338 | break; |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | static uint32_t platform_fixed_ioport_readw(void *opaque, uint32_t addr) |
| 343 | { |
| 344 | switch (addr) { |
| 345 | case 0: |
| 346 | /* Magic value so that you can identify the interface. */ |
| 347 | return 0x49d2; |
| 348 | default: |
| 349 | return 0xffff; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | static uint32_t platform_fixed_ioport_readb(void *opaque, uint32_t addr) |
| 354 | { |
| 355 | PCIXenPlatformState *s = opaque; |
| 356 | |
| 357 | switch (addr) { |
| 358 | case 0: |
| 359 | /* Platform flags */ |
| 360 | return s->flags; |
| 361 | case 2: |
| 362 | /* Version number */ |
| 363 | return 1; |
| 364 | default: |
| 365 | return 0xff; |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | static void platform_fixed_ioport_reset(void *opaque) |
| 370 | { |
| 371 | PCIXenPlatformState *s = opaque; |
| 372 | |
| 373 | platform_fixed_ioport_writeb(s, 0, 0); |
| 374 | } |
| 375 | |
| 376 | static uint64_t platform_fixed_ioport_read(void *opaque, |
| 377 | hwaddr addr, |
| 378 | unsigned size) |
| 379 | { |
| 380 | switch (size) { |
| 381 | case 1: |
| 382 | return platform_fixed_ioport_readb(opaque, addr); |
| 383 | case 2: |
| 384 | return platform_fixed_ioport_readw(opaque, addr); |
| 385 | default: |
| 386 | return -1; |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | static void platform_fixed_ioport_write(void *opaque, hwaddr addr, |
| 391 | |
| 392 | uint64_t val, unsigned size) |
| 393 | { |
| 394 | switch (size) { |
| 395 | case 1: |
| 396 | platform_fixed_ioport_writeb(opaque, addr, val); |
| 397 | break; |
| 398 | case 2: |
| 399 | platform_fixed_ioport_writew(opaque, addr, val); |
| 400 | break; |
| 401 | case 4: |
| 402 | platform_fixed_ioport_writel(opaque, addr, val); |
| 403 | break; |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | |
| 408 | static const MemoryRegionOps platform_fixed_io_ops = { |
| 409 | .read = platform_fixed_ioport_read, |
| 410 | .write = platform_fixed_ioport_write, |
| 411 | .valid = { |
| 412 | .unaligned = true, |
| 413 | }, |
| 414 | .impl = { |
| 415 | .min_access_size = 1, |
| 416 | .max_access_size = 4, |
| 417 | .unaligned = true, |
| 418 | }, |
| 419 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 420 | }; |
| 421 | |
| 422 | static void platform_fixed_ioport_init(PCIXenPlatformState* s) |
| 423 | { |
| 424 | memory_region_init_io(&s->fixed_io, OBJECT(s), &platform_fixed_io_ops, s, |
| 425 | "xen-fixed", 16); |
| 426 | memory_region_add_subregion(get_system_io(), XEN_PLATFORM_IOPORT, |
| 427 | &s->fixed_io); |
| 428 | } |
| 429 | |
| 430 | /* Xen Platform PCI Device */ |
| 431 | |
| 432 | static uint64_t xen_platform_ioport_readb(void *opaque, hwaddr addr, |
| 433 | unsigned int size) |
| 434 | { |
| 435 | if (addr == 0) { |
| 436 | return platform_fixed_ioport_readb(opaque, 0); |
| 437 | } else { |
| 438 | return ~0u; |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | static void xen_platform_ioport_writeb(void *opaque, hwaddr addr, |
| 443 | uint64_t val, unsigned int size) |
| 444 | { |
| 445 | PCIXenPlatformState *s = opaque; |
| 446 | PCIDevice *pci_dev = PCI_DEVICE(s); |
| 447 | |
| 448 | switch (addr) { |
| 449 | case 0: /* Platform flags */ |
| 450 | platform_fixed_ioport_writeb(opaque, 0, (uint32_t)val); |
| 451 | break; |
| 452 | case 4: |
| 453 | if (val == 1) { |
| 454 | /* |
| 455 | * SUSE unplug for Xenlinux |
| 456 | * xen-kmp used this since xen-3.0.4, instead the official protocol |
| 457 | * from xen-3.3+ It did an unconditional "outl(1, (ioaddr + 4));" |
| 458 | * Pre VMDP 1.7 used 4 and 8 depending on how VMDP was configured. |
| 459 | * If VMDP was to control both disk and LAN it would use 4. |
| 460 | * If it controlled just disk or just LAN, it would use 8 below. |
| 461 | */ |
| 462 | pci_unplug_disks(pci_get_bus(pci_dev), UNPLUG_IDE_SCSI_DISKS); |
| 463 | pci_unplug_nics(pci_get_bus(pci_dev)); |
| 464 | } |
| 465 | break; |
| 466 | case 8: |
| 467 | switch (val) { |
| 468 | case 1: |
| 469 | pci_unplug_disks(pci_get_bus(pci_dev), UNPLUG_IDE_SCSI_DISKS); |
| 470 | break; |
| 471 | case 2: |
| 472 | pci_unplug_nics(pci_get_bus(pci_dev)); |
| 473 | break; |
| 474 | default: |
| 475 | log_writeb(s, (uint32_t)val); |
| 476 | break; |
| 477 | } |
| 478 | break; |
| 479 | default: |
| 480 | break; |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | static const MemoryRegionOps xen_pci_io_ops = { |
| 485 | .read = xen_platform_ioport_readb, |
| 486 | .write = xen_platform_ioport_writeb, |
| 487 | .impl.min_access_size = 1, |
| 488 | .impl.max_access_size = 1, |
| 489 | }; |
| 490 | |
| 491 | static void platform_ioport_bar_setup(PCIXenPlatformState *d) |
| 492 | { |
| 493 | memory_region_init_io(&d->bar, OBJECT(d), &xen_pci_io_ops, d, |
| 494 | "xen-pci", 0x100); |
| 495 | } |
| 496 | |
| 497 | static uint64_t platform_mmio_read(void *opaque, hwaddr addr, |
| 498 | unsigned size) |
| 499 | { |
| 500 | DPRINTF("Warning: attempted read from physical address " |
| 501 | "0x" HWADDR_FMT_plx " in xen platform mmio space\n", addr); |
| 502 | |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | static void platform_mmio_write(void *opaque, hwaddr addr, |
| 507 | uint64_t val, unsigned size) |
| 508 | { |
| 509 | DPRINTF("Warning: attempted write of 0x%"PRIx64" to physical " |
| 510 | "address 0x" HWADDR_FMT_plx " in xen platform mmio space\n", |
| 511 | val, addr); |
| 512 | } |
| 513 | |
| 514 | static const MemoryRegionOps platform_mmio_handler = { |
| 515 | .read = &platform_mmio_read, |
| 516 | .write = &platform_mmio_write, |
| 517 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 518 | }; |
| 519 | |
| 520 | static void platform_mmio_setup(PCIXenPlatformState *d) |
| 521 | { |
| 522 | memory_region_init_io(&d->mmio_bar, OBJECT(d), &platform_mmio_handler, d, |
| 523 | "xen-mmio", 0x1000000); |
| 524 | } |
| 525 | |
| 526 | static int xen_platform_post_load(void *opaque, int version_id) |
| 527 | { |
| 528 | PCIXenPlatformState *s = opaque; |
| 529 | |
| 530 | platform_fixed_ioport_writeb(s, 0, s->flags); |
| 531 | |
| 532 | return 0; |
| 533 | } |
| 534 | |
| 535 | static const VMStateDescription vmstate_xen_platform = { |
| 536 | .name = "platform", |
| 537 | .version_id = 4, |
| 538 | .minimum_version_id = 4, |
| 539 | .post_load = xen_platform_post_load, |
| 540 | .fields = (const VMStateField[]) { |
| 541 | VMSTATE_PCI_DEVICE(parent_obj, PCIXenPlatformState), |
| 542 | VMSTATE_UINT8(flags, PCIXenPlatformState), |
| 543 | VMSTATE_END_OF_LIST() |
| 544 | } |
| 545 | }; |
| 546 | |
| 547 | static void xen_platform_realize(PCIDevice *dev, Error **errp) |
| 548 | { |
| 549 | PCIXenPlatformState *d = XEN_PLATFORM(dev); |
| 550 | uint8_t *pci_conf; |
| 551 | |
| 552 | /* Device will crash on reset if xen is not initialized */ |
| 553 | if (xen_mode == XEN_DISABLED) { |
| 554 | error_setg(errp, "xen-platform device requires a Xen guest"); |
| 555 | return; |
| 556 | } |
| 557 | |
| 558 | pci_conf = dev->config; |
| 559 | |
| 560 | pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY); |
| 561 | |
| 562 | pci_config_set_prog_interface(pci_conf, 0); |
| 563 | |
| 564 | pci_conf[PCI_INTERRUPT_PIN] = 1; |
| 565 | |
| 566 | platform_ioport_bar_setup(d); |
| 567 | pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->bar); |
| 568 | |
| 569 | /* reserve 16MB mmio address for share memory*/ |
| 570 | platform_mmio_setup(d); |
| 571 | pci_register_bar(dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH, |
| 572 | &d->mmio_bar); |
| 573 | |
| 574 | platform_fixed_ioport_init(d); |
| 575 | } |
| 576 | |
| 577 | static void platform_reset(DeviceState *dev) |
| 578 | { |
| 579 | PCIXenPlatformState *s = XEN_PLATFORM(dev); |
| 580 | |
| 581 | platform_fixed_ioport_reset(s); |
| 582 | } |
| 583 | |
| 584 | static void xen_platform_class_init(ObjectClass *klass, const void *data) |
| 585 | { |
| 586 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 587 | PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| 588 | |
| 589 | k->realize = xen_platform_realize; |
| 590 | k->vendor_id = PCI_VENDOR_ID_XEN; |
| 591 | k->device_id = PCI_DEVICE_ID_XEN_PLATFORM; |
| 592 | k->class_id = PCI_CLASS_OTHERS << 8 | 0x80; |
| 593 | k->subsystem_vendor_id = PCI_VENDOR_ID_XEN; |
| 594 | k->subsystem_id = PCI_DEVICE_ID_XEN_PLATFORM; |
| 595 | k->revision = 1; |
| 596 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
| 597 | dc->desc = "XEN platform pci device"; |
| 598 | device_class_set_legacy_reset(dc, platform_reset); |
| 599 | dc->vmsd = &vmstate_xen_platform; |
| 600 | } |
| 601 | |
| 602 | static const TypeInfo xen_platform_info = { |
| 603 | .name = TYPE_XEN_PLATFORM, |
| 604 | .parent = TYPE_PCI_DEVICE, |
| 605 | .instance_size = sizeof(PCIXenPlatformState), |
| 606 | .class_init = xen_platform_class_init, |
| 607 | .interfaces = (const InterfaceInfo[]) { |
| 608 | { INTERFACE_CONVENTIONAL_PCI_DEVICE }, |
| 609 | { }, |
| 610 | }, |
| 611 | }; |
| 612 | |
| 613 | static void xen_platform_register_types(void) |
| 614 | { |
| 615 | type_register_static(&xen_platform_info); |
| 616 | } |
| 617 | |
| 618 | type_init(xen_platform_register_types) |