qemu/hw/device-assignment.c

   1 /*
   2  * Copyright (c) 2007, Neocleus Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  15  * Place - Suite 330, Boston, MA 02111-1307 USA.
  16  *
  17  *
  18  *  Assign a PCI device from the host to a guest VM.
  19  *
  20  *  Adapted for KVM by Qumranet.
  21  *
  22  *  Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
  23  *  Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
  24  *  Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
  25  *  Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
  26  *  Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
  27  */
  28 #include <stdio.h>
  29 #include <sys/io.h>
  30 #include "qemu-kvm.h"
  31 #include "hw.h"
  32 #include "pc.h"
  33 #include "sysemu.h"
  34 #include "console.h"
  35 #include "device-assignment.h"
  36
  37 /* From linux/ioport.h */
  38 #define IORESOURCE_IO       0x00000100  /* Resource type */
  39 #define IORESOURCE_MEM      0x00000200
  40 #define IORESOURCE_IRQ      0x00000400
  41 #define IORESOURCE_DMA      0x00000800
  42 #define IORESOURCE_PREFETCH 0x00001000  /* No side effects */
  43
  44 /* #define DEVICE_ASSIGNMENT_DEBUG 1 */
  45
  46 #ifdef DEVICE_ASSIGNMENT_DEBUG
  47 #define DEBUG(fmt, ...)                                       \
  48     do {                                                      \
  49       fprintf(stderr, "%s: " fmt, __func__ , __VA_ARGS__);    \
  50     } while (0)
  51 #else
  52 #define DEBUG(fmt, ...) do { } while(0)
  53 #endif
  54
  55 static uint32_t guest_to_host_ioport(AssignedDevRegion *region, uint32_t addr)
  56 {
  57     return region->u.r_baseport + (addr - region->e_physbase);
  58 }
  59
  60 static void assigned_dev_ioport_writeb(void *opaque, uint32_t addr,
  61                                        uint32_t value)
  62 {
  63     AssignedDevRegion *r_access = opaque;
  64     uint32_t r_pio = guest_to_host_ioport(r_access, addr);
  65
  66     DEBUG("r_pio=%08x e_physbase=%08x r_baseport=%08lx value=%08x\n",
  67           r_pio, (int)r_access->e_physbase,
  68           (unsigned long)r_access->u.r_baseport, value);
  69
  70     outb(value, r_pio);
  71 }
  72
  73 static void assigned_dev_ioport_writew(void *opaque, uint32_t addr,
  74                                        uint32_t value)
  75 {
  76     AssignedDevRegion *r_access = opaque;
  77     uint32_t r_pio = guest_to_host_ioport(r_access, addr);
  78
  79     DEBUG("r_pio=%08x e_physbase=%08x r_baseport=%08lx value=%08x\n",
  80           r_pio, (int)r_access->e_physbase,
  81           (unsigned long)r_access->u.r_baseport, value);
  82
  83     outw(value, r_pio);
  84 }
  85
  86 static void assigned_dev_ioport_writel(void *opaque, uint32_t addr,
  87                        uint32_t value)
  88 {
  89     AssignedDevRegion *r_access = opaque;
  90     uint32_t r_pio = guest_to_host_ioport(r_access, addr);
  91
  92     DEBUG("r_pio=%08x e_physbase=%08x r_baseport=%08lx value=%08x\n",
  93           r_pio, (int)r_access->e_physbase,
  94           (unsigned long)r_access->u.r_baseport, value);
  95
  96     outl(value, r_pio);
  97 }
  98
  99 static uint32_t assigned_dev_ioport_readb(void *opaque, uint32_t addr)
 100 {
 101     AssignedDevRegion *r_access = opaque;
 102     uint32_t r_pio = guest_to_host_ioport(r_access, addr);
 103     uint32_t value;
 104
 105     value = inb(r_pio);
 106
 107     DEBUG("r_pio=%08x e_physbase=%08x r_=%08lx value=%08x\n",
 108           r_pio, (int)r_access->e_physbase,
 109           (unsigned long)r_access->u.r_baseport, value);
 110
 111     return value;
 112 }
 113
 114 static uint32_t assigned_dev_ioport_readw(void *opaque, uint32_t addr)
 115 {
 116     AssignedDevRegion *r_access = opaque;
 117     uint32_t r_pio = guest_to_host_ioport(r_access, addr);
 118     uint32_t value;
 119
 120     value = inw(r_pio);
 121
 122     DEBUG("r_pio=%08x e_physbase=%08x r_baseport=%08lx value=%08x\n",
 123           r_pio, (int)r_access->e_physbase,
 124           (unsigned long)r_access->u.r_baseport, value);
 125
 126     return value;
 127 }
 128
 129 static uint32_t assigned_dev_ioport_readl(void *opaque, uint32_t addr)
 130 {
 131     AssignedDevRegion *r_access = opaque;
 132     uint32_t r_pio = guest_to_host_ioport(r_access, addr);
 133     uint32_t value;
 134
 135     value = inl(r_pio);
 136
 137     DEBUG("r_pio=%08x e_physbase=%08x r_baseport=%08lx value=%08x\n",
 138           r_pio, (int)r_access->e_physbase,
 139           (unsigned long)r_access->u.r_baseport, value);
 140
 141     return value;
 142 }
 143
 144 static void assigned_dev_iomem_map(PCIDevice *pci_dev, int region_num,
 145                                    uint32_t e_phys, uint32_t e_size, int type)
 146 {
 147     AssignedDevice *r_dev = (AssignedDevice *) pci_dev;
 148     AssignedDevRegion *region = &r_dev->v_addrs[region_num];
 149     uint32_t old_ephys = region->e_physbase;
 150     uint32_t old_esize = region->e_size;
 151     int first_map = (region->e_size == 0);
 152     int ret = 0;
 153
 154     DEBUG("e_phys=%08x r_virt=%p type=%d len=%08x region_num=%d \n",
 155           e_phys, region->u.r_virtbase, type, e_size, region_num);
 156
 157     region->e_physbase = e_phys;
 158     region->e_size = e_size;
 159
 160     if (!first_map)
 161         kvm_destroy_phys_mem(kvm_context, old_ephys, old_esize);
 162
 163     if (e_size > 0)
 164         ret = kvm_register_phys_mem(kvm_context, e_phys,
 165                                         region->u.r_virtbase, e_size, 0);
 166     if (ret != 0) {
 167         fprintf(stderr, "%s: Error: create new mapping failed\n", __func__);
 168         exit(1);
 169     }
 170 }
 171
 172 static void assigned_dev_ioport_map(PCIDevice *pci_dev, int region_num,
 173                                     uint32_t addr, uint32_t size, int type)
 174 {
 175     AssignedDevice *r_dev = (AssignedDevice *) pci_dev;
 176     AssignedDevRegion *region = &r_dev->v_addrs[region_num];
 177     int first_map = (region->e_size == 0);
 178     CPUState *env;
 179
 180     region->e_physbase = addr;
 181     region->e_size = size;
 182
 183     DEBUG("e_phys=0x%x r_baseport=%x type=0x%x len=%d region_num=%d \n",
 184           addr, region->u.r_baseport, type, size, region_num);
 185
 186     if (first_map) {
 187         struct ioperm_data *data;
 188
 189         data = qemu_mallocz(sizeof(struct ioperm_data));
 190         if (data == NULL) {
 191             fprintf(stderr, "%s: Out of memory\n", __func__);
 192             exit(1);
 193         }
 194
 195         data->start_port = region->u.r_baseport;
 196         data->num = region->r_size;
 197         data->turn_on = 1;
 198
 199         kvm_add_ioperm_data(data);
 200
 201         for (env = first_cpu; env; env = env->next_cpu)
 202             kvm_ioperm(env, data);
 203     }
 204
 205     register_ioport_read(addr, size, 1, assigned_dev_ioport_readb,
 206                          (r_dev->v_addrs + region_num));
 207     register_ioport_read(addr, size, 2, assigned_dev_ioport_readw,
 208                          (r_dev->v_addrs + region_num));
 209     register_ioport_read(addr, size, 4, assigned_dev_ioport_readl,
 210                          (r_dev->v_addrs + region_num));
 211     register_ioport_write(addr, size, 1, assigned_dev_ioport_writeb,
 212                           (r_dev->v_addrs + region_num));
 213     register_ioport_write(addr, size, 2, assigned_dev_ioport_writew,
 214                           (r_dev->v_addrs + region_num));
 215     register_ioport_write(addr, size, 4, assigned_dev_ioport_writel,
 216                           (r_dev->v_addrs + region_num));
 217 }
 218
 219 static void assigned_dev_pci_write_config(PCIDevice *d, uint32_t address,
 220                                           uint32_t val, int len)
 221 {
 222     int fd;
 223     ssize_t ret;
 224
 225     DEBUG("(%x.%x): address=%04x val=0x%08x len=%d\n",
 226           ((d->devfn >> 3) & 0x1F), (d->devfn & 0x7),
 227           (uint16_t) address, val, len);
 228
 229     if (address == 0x4) {
 230         pci_default_write_config(d, address, val, len);
 231         /* Continue to program the card */
 232     }
 233
 234     if ((address >= 0x10 && address <= 0x24) || address == 0x34 ||
 235         address == 0x3c || address == 0x3d) {
 236         /* used for update-mappings (BAR emulation) */
 237         pci_default_write_config(d, address, val, len);
 238         return;
 239     }
 240
 241     DEBUG("NON BAR (%x.%x): address=%04x val=0x%08x len=%d\n",
 242           ((d->devfn >> 3) & 0x1F), (d->devfn & 0x7),
 243           (uint16_t) address, val, len);
 244
 245     fd = ((AssignedDevice *)d)->real_device.config_fd;
 246
 247 again:
 248     ret = pwrite(fd, &val, len, address);
 249     if (ret != len) {
 250         if ((ret < 0) && (errno == EINTR || errno == EAGAIN))
 251             goto again;
 252
 253         fprintf(stderr, "%s: pwrite failed, ret = %zd errno = %d\n",
 254                 __func__, ret, errno);
 255
 256         exit(1);
 257     }
 258 }
 259
 260 static uint32_t assigned_dev_pci_read_config(PCIDevice *d, uint32_t address,
 261                                              int len)
 262 {
 263     uint32_t val = 0;
 264     int fd;
 265     ssize_t ret;
 266
 267     if ((address >= 0x10 && address <= 0x24) || address == 0x34 ||
 268         address == 0x3c || address == 0x3d) {
 269         val = pci_default_read_config(d, address, len);
 270         DEBUG("(%x.%x): address=%04x val=0x%08x len=%d\n",
 271               (d->devfn >> 3) & 0x1F, (d->devfn & 0x7), address, val, len);
 272         return val;
 273     }
 274
 275     /* vga specific, remove later */
 276     if (address == 0xFC)
 277         goto do_log;
 278
 279     fd = ((AssignedDevice *)d)->real_device.config_fd;
 280
 281 again:
 282     ret = pread(fd, &val, len, address);
 283     if (ret != len) {
 284         if ((ret < 0) && (errno == EINTR || errno == EAGAIN))
 285             goto again;
 286
 287         fprintf(stderr, "%s: pread failed, ret = %zd errno = %d\n",
 288                 __func__, ret, errno);
 289
 290         exit(1);
 291     }
 292
 293 do_log:
 294     DEBUG("(%x.%x): address=%04x val=0x%08x len=%d\n",
 295           (d->devfn >> 3) & 0x1F, (d->devfn & 0x7), address, val, len);
 296
 297     /* kill the special capabilities */
 298     if (address == 4 && len == 4)
 299         val &= ~0x100000;
 300     else if (address == 6)
 301         val &= ~0x10;
 302
 303     return val;
 304 }
 305
 306 static int assigned_dev_register_regions(PCIRegion *io_regions,
 307                                          unsigned long regions_num,
 308                                          AssignedDevice *pci_dev)
 309 {
 310     uint32_t i;
 311     PCIRegion *cur_region = io_regions;
 312
 313     for (i = 0; i < regions_num; i++, cur_region++) {
 314         if (!cur_region->valid)
 315             continue;
 316         pci_dev->v_addrs[i].num = i;
 317
 318         /* handle memory io regions */
 319         if (cur_region->type & IORESOURCE_MEM) {
 320             int t = cur_region->type & IORESOURCE_PREFETCH
 321                 ? PCI_ADDRESS_SPACE_MEM_PREFETCH
 322                 : PCI_ADDRESS_SPACE_MEM;
 323
 324             /* map physical memory */
 325             pci_dev->v_addrs[i].e_physbase = cur_region->base_addr;
 326             pci_dev->v_addrs[i].u.r_virtbase =
 327                 mmap(NULL,
 328                      (cur_region->size + 0xFFF) & 0xFFFFF000,
 329                      PROT_WRITE | PROT_READ, MAP_SHARED,
 330                      cur_region->resource_fd, (off_t) 0);
 331
 332             if (pci_dev->v_addrs[i].u.r_virtbase == MAP_FAILED) {
 333                 pci_dev->v_addrs[i].u.r_virtbase = NULL;
 334                 fprintf(stderr, "%s: Error: Couldn't mmap 0x%x!"
 335                         "\n", __func__,
 336                         (uint32_t) (cur_region->base_addr));
 337                 return -1;
 338             }
 339             pci_dev->v_addrs[i].r_size = cur_region->size;
 340             pci_dev->v_addrs[i].e_size = 0;
 341
 342             /* add offset */
 343             pci_dev->v_addrs[i].u.r_virtbase +=
 344                 (cur_region->base_addr & 0xFFF);
 345
 346             pci_register_io_region((PCIDevice *) pci_dev, i,
 347                                    cur_region->size, t,
 348                                    assigned_dev_iomem_map);
 349             continue;
 350         }
 351         /* handle port io regions */
 352         pci_dev->v_addrs[i].e_physbase = cur_region->base_addr;
 353         pci_dev->v_addrs[i].u.r_baseport = cur_region->base_addr;
 354         pci_dev->v_addrs[i].r_size = cur_region->size;
 355         pci_dev->v_addrs[i].e_size = 0;
 356
 357         pci_register_io_region((PCIDevice *) pci_dev, i,
 358                                cur_region->size, PCI_ADDRESS_SPACE_IO,
 359                                assigned_dev_ioport_map);
 360
 361         /* not relevant for port io */
 362         pci_dev->v_addrs[i].memory_index = 0;
 363     }
 364
 365     /* success */
 366     return 0;
 367 }
 368
 369 static int get_real_device(AssignedDevice *pci_dev, uint8_t r_bus,
 370                            uint8_t r_dev, uint8_t r_func)
 371 {
 372     char dir[128], name[128];
 373     int fd, r = 0;
 374     FILE *f;
 375     unsigned long long start, end, size, flags;
 376     PCIRegion *rp;
 377     PCIDevRegions *dev = &pci_dev->real_device;
 378
 379     dev->region_number = 0;
 380
 381     snprintf(dir, sizeof(dir), "/sys/bus/pci/devices/0000:%02x:%02x.%x/",
 382              r_bus, r_dev, r_func);
 383
 384     snprintf(name, sizeof(name), "%sconfig", dir);
 385
 386     fd = open(name, O_RDWR);
 387     if (fd == -1) {
 388         fprintf(stderr, "%s: %s: %m\n", __func__, name);
 389         return 1;
 390     }
 391     dev->config_fd = fd;
 392 again:
 393     r = read(fd, pci_dev->dev.config, sizeof(pci_dev->dev.config));
 394     if (r < 0) {
 395         if (errno == EINTR || errno == EAGAIN)
 396             goto again;
 397         fprintf(stderr, "%s: read failed, errno = %d\n", __func__, errno);
 398     }
 399
 400     snprintf(name, sizeof(name), "%sresource", dir);
 401
 402     f = fopen(name, "r");
 403     if (f == NULL) {
 404         fprintf(stderr, "%s: %s: %m\n", __func__, name);
 405         return 1;
 406     }
 407
 408     for (r = 0; r < MAX_IO_REGIONS; r++) {
 409         if (fscanf(f, "%lli %lli %lli\n", &start, &end, &flags) != 3)
 410             break;
 411
 412         rp = dev->regions + r;
 413         rp->valid = 0;
 414         size = end - start + 1;
 415         flags &= IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH;
 416         if (size == 0 || (flags & ~IORESOURCE_PREFETCH) == 0)
 417             continue;
 418         if (flags & IORESOURCE_MEM) {
 419             flags &= ~IORESOURCE_IO;
 420             snprintf(name, sizeof(name), "%sresource%d", dir, r);
 421             fd = open(name, O_RDWR);
 422             if (fd == -1)
 423                 continue;       /* probably ROM */
 424             rp->resource_fd = fd;
 425         } else
 426             flags &= ~IORESOURCE_PREFETCH;
 427
 428         rp->type = flags;
 429         rp->valid = 1;
 430         rp->base_addr = start;
 431         rp->size = size;
 432         DEBUG("region %d size %d start 0x%llx type %d resource_fd %d\n",
 433               r, rp->size, start, rp->type, rp->resource_fd);
 434     }
 435     fclose(f);
 436
 437     dev->region_number = r;
 438     return 0;
 439 }
 440
 441 static LIST_HEAD(, AssignedDevInfo) adev_head;
 442
 443 void free_assigned_device(AssignedDevInfo *adev)
 444 {
 445     AssignedDevice *dev = adev->assigned_dev;
 446
 447     if (dev) {
 448         int i;
 449
 450         for (i = 0; i < dev->real_device.region_number; i++) {
 451             PCIRegion *pci_region = &dev->real_device.regions[i];
 452             AssignedDevRegion *region = &dev->v_addrs[i];
 453
 454             if (!pci_region->valid || !(pci_region->type & IORESOURCE_MEM))
 455                 continue;
 456
 457             if (region->u.r_virtbase) {
 458                 int ret = munmap(region->u.r_virtbase,
 459                                  (pci_region->size + 0xFFF) & 0xFFFFF000);
 460                 if (ret != 0)
 461                     fprintf(stderr,
 462                             "Failed to unmap assigned device region: %s\n",
 463                             strerror(errno));
 464             }
 465         }
 466
 467         if (dev->real_device.config_fd) {
 468             close(dev->real_device.config_fd);
 469             dev->real_device.config_fd = 0;
 470         }
 471
 472         pci_unregister_device(&dev->dev);
 473         adev->assigned_dev = dev = NULL;
 474     }
 475
 476     LIST_REMOVE(adev, next);
 477     qemu_free(adev);
 478 }
 479
 480 static uint32_t calc_assigned_dev_id(uint8_t bus, uint8_t devfn)
 481 {
 482     return (uint32_t)bus << 8 | (uint32_t)devfn;
 483 }
 484
 485 /* The pci config space got updated. Check if irq numbers have changed
 486  * for our devices
 487  */
 488 void assigned_dev_update_irq(PCIDevice *d)
 489 {
 490     AssignedDevInfo *adev;
 491
 492     adev = LIST_FIRST(&adev_head);
 493     while (adev) {
 494         AssignedDevInfo *next = LIST_NEXT(adev, next);
 495         AssignedDevice *assigned_dev = adev->assigned_dev;
 496         int irq, r;
 497
 498         irq = pci_map_irq(&assigned_dev->dev, assigned_dev->intpin);
 499         irq = piix_get_irq(irq);
 500
 501 #ifdef TARGET_IA64
 502         irq = ipf_map_irq(d, irq);
 503 #endif
 504
 505         if (irq != assigned_dev->girq) {
 506             struct kvm_assigned_irq assigned_irq_data;
 507
 508             memset(&assigned_irq_data, 0, sizeof(assigned_irq_data));
 509             assigned_irq_data.assigned_dev_id  =
 510                 calc_assigned_dev_id(assigned_dev->h_busnr,
 511                                      (uint8_t) assigned_dev->h_devfn);
 512             assigned_irq_data.guest_irq = irq;
 513             assigned_irq_data.host_irq = assigned_dev->real_device.irq;
 514             r = kvm_assign_irq(kvm_context, &assigned_irq_data);
 515             if (r < 0) {
 516                 fprintf(stderr, "Failed to assign irq for \"%s\": %s\n",
 517                         adev->name, strerror(-r));
 518                 fprintf(stderr, "Perhaps you are assigning a device "
 519                         "that shares an IRQ with another device?\n");
 520                 LIST_REMOVE(adev, next);
 521                 free_assigned_device(adev);
 522                 adev = next;
 523                 continue;
 524             }
 525             assigned_dev->girq = irq;
 526         }
 527
 528         adev = next;
 529     }
 530 }
 531
 532 struct PCIDevice *init_assigned_device(AssignedDevInfo *adev, PCIBus *bus)
 533 {
 534     int r;
 535     AssignedDevice *dev;
 536     uint8_t e_device, e_intx;
 537     struct kvm_assigned_pci_dev assigned_dev_data;
 538
 539     DEBUG("Registering real physical device %s (bus=%x dev=%x func=%x)\n",
 540           adev->name, adev->bus, adev->dev, adev->func);
 541
 542     dev = (AssignedDevice *)
 543         pci_register_device(bus, adev->name, sizeof(AssignedDevice),
 544                             -1, assigned_dev_pci_read_config,
 545                             assigned_dev_pci_write_config);
 546     if (NULL == dev) {
 547         fprintf(stderr, "%s: Error: Couldn't register real device %s\n",
 548                 __func__, adev->name);
 549         return NULL;
 550     }
 551
 552     if (get_real_device(dev, adev->bus, adev->dev, adev->func)) {
 553         fprintf(stderr, "%s: Error: Couldn't get real device (%s)!\n",
 554                 __func__, adev->name);
 555         goto out;
 556     }
 557
 558     /* handle real device's MMIO/PIO BARs */
 559     if (assigned_dev_register_regions(dev->real_device.regions,
 560                                       dev->real_device.region_number,
 561                                       dev))
 562         goto out;
 563
 564     /* handle interrupt routing */
 565     e_device = (dev->dev.devfn >> 3) & 0x1f;
 566     e_intx = dev->dev.config[0x3d] - 1;
 567     dev->intpin = e_intx;
 568     dev->run = 0;
 569     dev->girq = 0;
 570     dev->h_busnr = adev->bus;
 571     dev->h_devfn = PCI_DEVFN(adev->dev, adev->func);
 572
 573     memset(&assigned_dev_data, 0, sizeof(assigned_dev_data));
 574     assigned_dev_data.assigned_dev_id  =
 575         calc_assigned_dev_id(dev->h_busnr, (uint32_t)dev->h_devfn);
 576     assigned_dev_data.busnr = dev->h_busnr;
 577     assigned_dev_data.devfn = dev->h_devfn;
 578
 579 #ifdef KVM_CAP_IOMMU
 580     /* We always enable the IOMMU if present
 581      * (or when not disabled on the command line)
 582      */
 583     r = kvm_check_extension(kvm_context, KVM_CAP_IOMMU);
 584     if (r && !adev->disable_iommu)
 585         assigned_dev_data.flags |= KVM_DEV_ASSIGN_ENABLE_IOMMU;
 586 #endif
 587
 588     r = kvm_assign_pci_device(kvm_context, &assigned_dev_data);
 589     if (r < 0) {
 590         fprintf(stderr, "Failed to assign device \"%s\" : %s\n",
 591                 adev->name, strerror(-r));
 592         goto out;
 593     }
 594
 595     adev->assigned_dev = dev;
 596     return &dev->dev;
 597
 598 out:
 599     pci_unregister_device(&dev->dev);
 600     return NULL;
 601 }
 602
 603 /*
 604  * Syntax to assign device:
 605  *
 606  * -pcidevice host=bus:dev.func[,dma=none][,name=Foo]
 607  *
 608  * Example:
 609  * -pcidevice host=00:13.0,dma=pvdma
 610  *
 611  * dma can currently only be 'none' to disable iommu support.
 612  */
 613 AssignedDevInfo *add_assigned_device(const char *arg)
 614 {
 615     char *cp, *cp1;
 616     char device[8];
 617     char dma[6];
 618     int r;
 619     AssignedDevInfo *adev;
 620
 621     adev = qemu_mallocz(sizeof(AssignedDevInfo));
 622     if (adev == NULL) {
 623         fprintf(stderr, "%s: Out of memory\n", __func__);
 624         return NULL;
 625     }
 626     r = get_param_value(device, sizeof(device), "host", arg);
 627     r = get_param_value(adev->name, sizeof(adev->name), "name", arg);
 628     if (!r)
 629         snprintf(adev->name, sizeof(adev->name), "%s", device);
 630
 631 #ifdef KVM_CAP_IOMMU
 632     r = get_param_value(dma, sizeof(dma), "dma", arg);
 633     if (r && !strncmp(dma, "none", 4))
 634         adev->disable_iommu = 1;
 635 #endif
 636     cp = device;
 637     adev->bus = strtoul(cp, &cp1, 16);
 638     if (*cp1 != ':')
 639         goto bad;
 640     cp = cp1 + 1;
 641
 642     adev->dev = strtoul(cp, &cp1, 16);
 643     if (*cp1 != '.')
 644         goto bad;
 645     cp = cp1 + 1;
 646
 647     adev->func = strtoul(cp, &cp1, 16);
 648
 649     LIST_INSERT_HEAD(&adev_head, adev, next);
 650     return adev;
 651 bad:
 652     fprintf(stderr, "pcidevice argument parse error; "
 653             "please check the help text for usage\n");
 654     qemu_free(adev);
 655     return NULL;
 656 }
 657
 658 void add_assigned_devices(PCIBus *bus, const char **devices, int n_devices)
 659 {
 660     int i;
 661
 662     for (i = 0; i < n_devices; i++) {
 663         struct AssignedDevInfo *adev;
 664
 665         adev = add_assigned_device(devices[i]);
 666         if (!adev) {
 667             fprintf(stderr, "Could not add assigned device %s\n", devices[i]);
 668             continue;
 669             exit(1);
 670         }
 671
 672         if (!init_assigned_device(adev, bus)) {
 673             fprintf(stderr, "Failed to initialize assigned device %s\n",
 674                     devices[i]);
 675             exit(1);
 676         }
 677     }
 678 }