qemu-options.hx

   1 HXCOMM Use DEFHEADING() to define headings in both help text and texi
   2 HXCOMM Text between STEXI and ETEXI are copied to texi version and
   3 HXCOMM discarded from C version
   4 HXCOMM DEF(option, HAS_ARG/0, opt_enum, opt_help, arch_mask) is used to
   5 HXCOMM construct option structures, enums and help message for specified
   6 HXCOMM architectures.
   7 HXCOMM HXCOMM can be used for comments, discarded from both texi and C
   8
   9 DEFHEADING(Standard options:)
  10 STEXI
  11 @table @option
  12 ETEXI
  13
  14 DEF("help", 0, QEMU_OPTION_h,
  15     "-h or -help     display this help and exit\n", QEMU_ARCH_ALL)
  16 STEXI
  17 @item -h
  18 @findex -h
  19 Display help and exit
  20 ETEXI
  21
  22 DEF("version", 0, QEMU_OPTION_version,
  23     "-version        display version information and exit\n", QEMU_ARCH_ALL)
  24 STEXI
  25 @item -version
  26 @findex -version
  27 Display version information and exit
  28 ETEXI
  29
  30 DEF("M", HAS_ARG, QEMU_OPTION_M,
  31     "-M machine      select emulated machine (-M ? for list)\n", QEMU_ARCH_ALL)
  32 STEXI
  33 @item -M @var{machine}
  34 @findex -M
  35 Select the emulated @var{machine} (@code{-M ?} for list)
  36 ETEXI
  37
  38 DEF("cpu", HAS_ARG, QEMU_OPTION_cpu,
  39     "-cpu cpu        select CPU (-cpu ? for list)\n", QEMU_ARCH_ALL)
  40 STEXI
  41 @item -cpu @var{model}
  42 @findex -cpu
  43 Select CPU model (-cpu ? for list and additional feature selection)
  44 ETEXI
  45
  46 DEF("smp", HAS_ARG, QEMU_OPTION_smp,
  47     "-smp n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]\n"
  48     "                set the number of CPUs to 'n' [default=1]\n"
  49     "                maxcpus= maximum number of total cpus, including\n"
  50     "                offline CPUs for hotplug, etc\n"
  51     "                cores= number of CPU cores on one socket\n"
  52     "                threads= number of threads on one CPU core\n"
  53     "                sockets= number of discrete sockets in the system\n",
  54         QEMU_ARCH_ALL)
  55 STEXI
  56 @item -smp @var{n}[,cores=@var{cores}][,threads=@var{threads}][,sockets=@var{sockets}][,maxcpus=@var{maxcpus}]
  57 @findex -smp
  58 Simulate an SMP system with @var{n} CPUs. On the PC target, up to 255
  59 CPUs are supported. On Sparc32 target, Linux limits the number of usable CPUs
  60 to 4.
  61 For the PC target, the number of @var{cores} per socket, the number
  62 of @var{threads} per cores and the total number of @var{sockets} can be
  63 specified. Missing values will be computed. If any on the three values is
  64 given, the total number of CPUs @var{n} can be omitted. @var{maxcpus}
  65 specifies the maximum number of hotpluggable CPUs.
  66 ETEXI
  67
  68 DEF("numa", HAS_ARG, QEMU_OPTION_numa,
  69     "-numa node[,mem=size][,cpus=cpu[-cpu]][,nodeid=node]\n", QEMU_ARCH_ALL)
  70 STEXI
  71 @item -numa @var{opts}
  72 @findex -numa
  73 Simulate a multi node NUMA system. If mem and cpus are omitted, resources
  74 are split equally.
  75 ETEXI
  76
  77 DEF("fda", HAS_ARG, QEMU_OPTION_fda,
  78     "-fda/-fdb file  use 'file' as floppy disk 0/1 image\n", QEMU_ARCH_ALL)
  79 DEF("fdb", HAS_ARG, QEMU_OPTION_fdb, "", QEMU_ARCH_ALL)
  80 STEXI
  81 @item -fda @var{file}
  82 @item -fdb @var{file}
  83 @findex -fda
  84 @findex -fdb
  85 Use @var{file} as floppy disk 0/1 image (@pxref{disk_images}). You can
  86 use the host floppy by using @file{/dev/fd0} as filename (@pxref{host_drives}).
  87 ETEXI
  88
  89 DEF("hda", HAS_ARG, QEMU_OPTION_hda,
  90     "-hda/-hdb file  use 'file' as IDE hard disk 0/1 image\n", QEMU_ARCH_ALL)
  91 DEF("hdb", HAS_ARG, QEMU_OPTION_hdb, "", QEMU_ARCH_ALL)
  92 DEF("hdc", HAS_ARG, QEMU_OPTION_hdc,
  93     "-hdc/-hdd file  use 'file' as IDE hard disk 2/3 image\n", QEMU_ARCH_ALL)
  94 DEF("hdd", HAS_ARG, QEMU_OPTION_hdd, "", QEMU_ARCH_ALL)
  95 STEXI
  96 @item -hda @var{file}
  97 @item -hdb @var{file}
  98 @item -hdc @var{file}
  99 @item -hdd @var{file}
 100 @findex -hda
 101 @findex -hdb
 102 @findex -hdc
 103 @findex -hdd
 104 Use @var{file} as hard disk 0, 1, 2 or 3 image (@pxref{disk_images}).
 105 ETEXI
 106
 107 DEF("cdrom", HAS_ARG, QEMU_OPTION_cdrom,
 108     "-cdrom file     use 'file' as IDE cdrom image (cdrom is ide1 master)\n",
 109     QEMU_ARCH_ALL)
 110 STEXI
 111 @item -cdrom @var{file}
 112 @findex -cdrom
 113 Use @var{file} as CD-ROM image (you cannot use @option{-hdc} and
 114 @option{-cdrom} at the same time). You can use the host CD-ROM by
 115 using @file{/dev/cdrom} as filename (@pxref{host_drives}).
 116 ETEXI
 117
 118 DEF("drive", HAS_ARG, QEMU_OPTION_drive,
 119     "-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]\n"
 120     "       [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]\n"
 121     "       [,cache=writethrough|writeback|none|unsafe][,format=f]\n"
 122     "       [,serial=s][,addr=A][,id=name][,aio=threads|native]\n"
 123     "       [,readonly=on|off]\n"
 124     "                use 'file' as a drive image\n", QEMU_ARCH_ALL)
 125 STEXI
 126 @item -drive @var{option}[,@var{option}[,@var{option}[,...]]]
 127 @findex -drive
 128
 129 Define a new drive. Valid options are:
 130
 131 @table @option
 132 @item file=@var{file}
 133 This option defines which disk image (@pxref{disk_images}) to use with
 134 this drive. If the filename contains comma, you must double it
 135 (for instance, "file=my,,file" to use file "my,file").
 136 @item if=@var{interface}
 137 This option defines on which type on interface the drive is connected.
 138 Available types are: ide, scsi, sd, mtd, floppy, pflash, virtio.
 139 @item bus=@var{bus},unit=@var{unit}
 140 These options define where is connected the drive by defining the bus number and
 141 the unit id.
 142 @item index=@var{index}
 143 This option defines where is connected the drive by using an index in the list
 144 of available connectors of a given interface type.
 145 @item media=@var{media}
 146 This option defines the type of the media: disk or cdrom.
 147 @item cyls=@var{c},heads=@var{h},secs=@var{s}[,trans=@var{t}]
 148 These options have the same definition as they have in @option{-hdachs}.
 149 @item snapshot=@var{snapshot}
 150 @var{snapshot} is "on" or "off" and allows to enable snapshot for given drive (see @option{-snapshot}).
 151 @item cache=@var{cache}
 152 @var{cache} is "none", "writeback", "unsafe", or "writethrough" and controls how the host cache is used to access block data.
 153 @item aio=@var{aio}
 154 @var{aio} is "threads", or "native" and selects between pthread based disk I/O and native Linux AIO.
 155 @item format=@var{format}
 156 Specify which disk @var{format} will be used rather than detecting
 157 the format.  Can be used to specifiy format=raw to avoid interpreting
 158 an untrusted format header.
 159 @item serial=@var{serial}
 160 This option specifies the serial number to assign to the device.
 161 @item addr=@var{addr}
 162 Specify the controller's PCI address (if=virtio only).
 163 @end table
 164
 165 By default, writethrough caching is used for all block device.  This means that
 166 the host page cache will be used to read and write data but write notification
 167 will be sent to the guest only when the data has been reported as written by
 168 the storage subsystem.
 169
 170 Writeback caching will report data writes as completed as soon as the data is
 171 present in the host page cache.  This is safe as long as you trust your host.
 172 If your host crashes or loses power, then the guest may experience data
 173 corruption.
 174
 175 The host page cache can be avoided entirely with @option{cache=none}.  This will
 176 attempt to do disk IO directly to the guests memory.  QEMU may still perform
 177 an internal copy of the data.
 178
 179 Some block drivers perform badly with @option{cache=writethrough}, most notably,
 180 qcow2.  If performance is more important than correctness,
 181 @option{cache=writeback} should be used with qcow2.
 182
 183 In case you don't care about data integrity over host failures, use
 184 cache=unsafe. This option tells qemu that it never needs to write any data
 185 to the disk but can instead keeps things in cache. If anything goes wrong,
 186 like your host losing power, the disk storage getting disconnected accidently,
 187 etc. you're image will most probably be rendered unusable.   When using
 188 the @option{-snapshot} option, unsafe caching is always used.
 189
 190 Instead of @option{-cdrom} you can use:
 191 @example
 192 qemu -drive file=file,index=2,media=cdrom
 193 @end example
 194
 195 Instead of @option{-hda}, @option{-hdb}, @option{-hdc}, @option{-hdd}, you can
 196 use:
 197 @example
 198 qemu -drive file=file,index=0,media=disk
 199 qemu -drive file=file,index=1,media=disk
 200 qemu -drive file=file,index=2,media=disk
 201 qemu -drive file=file,index=3,media=disk
 202 @end example
 203
 204 You can connect a CDROM to the slave of ide0:
 205 @example
 206 qemu -drive file=file,if=ide,index=1,media=cdrom
 207 @end example
 208
 209 If you don't specify the "file=" argument, you define an empty drive:
 210 @example
 211 qemu -drive if=ide,index=1,media=cdrom
 212 @end example
 213
 214 You can connect a SCSI disk with unit ID 6 on the bus #0:
 215 @example
 216 qemu -drive file=file,if=scsi,bus=0,unit=6
 217 @end example
 218
 219 Instead of @option{-fda}, @option{-fdb}, you can use:
 220 @example
 221 qemu -drive file=file,index=0,if=floppy
 222 qemu -drive file=file,index=1,if=floppy
 223 @end example
 224
 225 By default, @var{interface} is "ide" and @var{index} is automatically
 226 incremented:
 227 @example
 228 qemu -drive file=a -drive file=b"
 229 @end example
 230 is interpreted like:
 231 @example
 232 qemu -hda a -hdb b
 233 @end example
 234 ETEXI
 235
 236 DEF("set", HAS_ARG, QEMU_OPTION_set,
 237     "-set group.id.arg=value\n"
 238     "                set <arg> parameter for item <id> of type <group>\n"
 239     "                i.e. -set drive.$id.file=/path/to/image\n", QEMU_ARCH_ALL)
 240 STEXI
 241 @item -set
 242 @findex -set
 243 TODO
 244 ETEXI
 245
 246 DEF("global", HAS_ARG, QEMU_OPTION_global,
 247     "-global driver.property=value\n"
 248     "                set a global default for a driver property\n",
 249     QEMU_ARCH_ALL)
 250 STEXI
 251 @item -global
 252 @findex -global
 253 TODO
 254 ETEXI
 255
 256 DEF("mtdblock", HAS_ARG, QEMU_OPTION_mtdblock,
 257     "-mtdblock file  use 'file' as on-board Flash memory image\n",
 258     QEMU_ARCH_ALL)
 259 STEXI
 260 @item -mtdblock @var{file}
 261 @findex -mtdblock
 262 Use @var{file} as on-board Flash memory image.
 263 ETEXI
 264
 265 DEF("sd", HAS_ARG, QEMU_OPTION_sd,
 266     "-sd file        use 'file' as SecureDigital card image\n", QEMU_ARCH_ALL)
 267 STEXI
 268 @item -sd @var{file}
 269 @findex -sd
 270 Use @var{file} as SecureDigital card image.
 271 ETEXI
 272
 273 DEF("pflash", HAS_ARG, QEMU_OPTION_pflash,
 274     "-pflash file    use 'file' as a parallel flash image\n", QEMU_ARCH_ALL)
 275 STEXI
 276 @item -pflash @var{file}
 277 @findex -pflash
 278 Use @var{file} as a parallel flash image.
 279 ETEXI
 280
 281 DEF("boot", HAS_ARG, QEMU_OPTION_boot,
 282     "-boot [order=drives][,once=drives][,menu=on|off]\n"
 283     "                'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)\n",
 284     QEMU_ARCH_ALL)
 285 STEXI
 286 @item -boot [order=@var{drives}][,once=@var{drives}][,menu=on|off]
 287 @findex -boot
 288 Specify boot order @var{drives} as a string of drive letters. Valid
 289 drive letters depend on the target achitecture. The x86 PC uses: a, b
 290 (floppy 1 and 2), c (first hard disk), d (first CD-ROM), n-p (Etherboot
 291 from network adapter 1-4), hard disk boot is the default. To apply a
 292 particular boot order only on the first startup, specify it via
 293 @option{once}.
 294
 295 Interactive boot menus/prompts can be enabled via @option{menu=on} as far
 296 as firmware/BIOS supports them. The default is non-interactive boot.
 297
 298 @example
 299 # try to boot from network first, then from hard disk
 300 qemu -boot order=nc
 301 # boot from CD-ROM first, switch back to default order after reboot
 302 qemu -boot once=d
 303 @end example
 304
 305 Note: The legacy format '-boot @var{drives}' is still supported but its
 306 use is discouraged as it may be removed from future versions.
 307 ETEXI
 308
 309 DEF("snapshot", 0, QEMU_OPTION_snapshot,
 310     "-snapshot       write to temporary files instead of disk image files\n",
 311     QEMU_ARCH_ALL)
 312 STEXI
 313 @item -snapshot
 314 @findex -snapshot
 315 Write to temporary files instead of disk image files. In this case,
 316 the raw disk image you use is not written back. You can however force
 317 the write back by pressing @key{C-a s} (@pxref{disk_images}).
 318 ETEXI
 319
 320 DEF("m", HAS_ARG, QEMU_OPTION_m,
 321     "-m megs         set virtual RAM size to megs MB [default="
 322     stringify(DEFAULT_RAM_SIZE) "]\n", QEMU_ARCH_ALL)
 323 STEXI
 324 @item -m @var{megs}
 325 @findex -m
 326 Set virtual RAM size to @var{megs} megabytes. Default is 128 MiB.  Optionally,
 327 a suffix of ``M'' or ``G'' can be used to signify a value in megabytes or
 328 gigabytes respectively.
 329 ETEXI
 330
 331 DEF("mem-path", HAS_ARG, QEMU_OPTION_mempath,
 332     "-mem-path FILE  provide backing storage for guest RAM\n", QEMU_ARCH_ALL)
 333 STEXI
 334 @item -mem-path @var{path}
 335 Allocate guest RAM from a temporarily created file in @var{path}.
 336 ETEXI
 337
 338 #ifdef MAP_POPULATE
 339 DEF("mem-prealloc", 0, QEMU_OPTION_mem_prealloc,
 340     "-mem-prealloc   preallocate guest memory (use with -mem-path)\n",
 341     QEMU_ARCH_ALL)
 342 STEXI
 343 @item -mem-prealloc
 344 Preallocate memory when using -mem-path.
 345 ETEXI
 346 #endif
 347
 348 DEF("k", HAS_ARG, QEMU_OPTION_k,
 349     "-k language     use keyboard layout (for example 'fr' for French)\n",
 350     QEMU_ARCH_ALL)
 351 STEXI
 352 @item -k @var{language}
 353 @findex -k
 354 Use keyboard layout @var{language} (for example @code{fr} for
 355 French). This option is only needed where it is not easy to get raw PC
 356 keycodes (e.g. on Macs, with some X11 servers or with a VNC
 357 display). You don't normally need to use it on PC/Linux or PC/Windows
 358 hosts.
 359
 360 The available layouts are:
 361 @example
 362 ar  de-ch  es  fo     fr-ca  hu  ja  mk     no  pt-br  sv
 363 da  en-gb  et  fr     fr-ch  is  lt  nl     pl  ru     th
 364 de  en-us  fi  fr-be  hr     it  lv  nl-be  pt  sl     tr
 365 @end example
 366
 367 The default is @code{en-us}.
 368 ETEXI
 369
 370
 371 DEF("audio-help", 0, QEMU_OPTION_audio_help,
 372     "-audio-help     print list of audio drivers and their options\n",
 373     QEMU_ARCH_ALL)
 374 STEXI
 375 @item -audio-help
 376 @findex -audio-help
 377 Will show the audio subsystem help: list of drivers, tunable
 378 parameters.
 379 ETEXI
 380
 381 DEF("soundhw", HAS_ARG, QEMU_OPTION_soundhw,
 382     "-soundhw c1,... enable audio support\n"
 383     "                and only specified sound cards (comma separated list)\n"
 384     "                use -soundhw ? to get the list of supported cards\n"
 385     "                use -soundhw all to enable all of them\n", QEMU_ARCH_ALL)
 386 STEXI
 387 @item -soundhw @var{card1}[,@var{card2},...] or -soundhw all
 388 @findex -soundhw
 389 Enable audio and selected sound hardware. Use ? to print all
 390 available sound hardware.
 391
 392 @example
 393 qemu -soundhw sb16,adlib disk.img
 394 qemu -soundhw es1370 disk.img
 395 qemu -soundhw ac97 disk.img
 396 qemu -soundhw all disk.img
 397 qemu -soundhw ?
 398 @end example
 399
 400 Note that Linux's i810_audio OSS kernel (for AC97) module might
 401 require manually specifying clocking.
 402
 403 @example
 404 modprobe i810_audio clocking=48000
 405 @end example
 406 ETEXI
 407
 408 STEXI
 409 @end table
 410 ETEXI
 411
 412 DEF("usb", 0, QEMU_OPTION_usb,
 413     "-usb            enable the USB driver (will be the default soon)\n",
 414     QEMU_ARCH_ALL)
 415 STEXI
 416 USB options:
 417 @table @option
 418
 419 @item -usb
 420 @findex -usb
 421 Enable the USB driver (will be the default soon)
 422 ETEXI
 423
 424 DEF("usbdevice", HAS_ARG, QEMU_OPTION_usbdevice,
 425     "-usbdevice name add the host or guest USB device 'name'\n",
 426     QEMU_ARCH_ALL)
 427 STEXI
 428
 429 @item -usbdevice @var{devname}
 430 @findex -usbdevice
 431 Add the USB device @var{devname}. @xref{usb_devices}.
 432
 433 @table @option
 434
 435 @item mouse
 436 Virtual Mouse. This will override the PS/2 mouse emulation when activated.
 437
 438 @item tablet
 439 Pointer device that uses absolute coordinates (like a touchscreen). This
 440 means qemu is able to report the mouse position without having to grab the
 441 mouse. Also overrides the PS/2 mouse emulation when activated.
 442
 443 @item disk:[format=@var{format}]:@var{file}
 444 Mass storage device based on file. The optional @var{format} argument
 445 will be used rather than detecting the format. Can be used to specifiy
 446 @code{format=raw} to avoid interpreting an untrusted format header.
 447
 448 @item host:@var{bus}.@var{addr}
 449 Pass through the host device identified by @var{bus}.@var{addr} (Linux only).
 450
 451 @item host:@var{vendor_id}:@var{product_id}
 452 Pass through the host device identified by @var{vendor_id}:@var{product_id}
 453 (Linux only).
 454
 455 @item serial:[vendorid=@var{vendor_id}][,productid=@var{product_id}]:@var{dev}
 456 Serial converter to host character device @var{dev}, see @code{-serial} for the
 457 available devices.
 458
 459 @item braille
 460 Braille device.  This will use BrlAPI to display the braille output on a real
 461 or fake device.
 462
 463 @item net:@var{options}
 464 Network adapter that supports CDC ethernet and RNDIS protocols.
 465
 466 @end table
 467 ETEXI
 468
 469 DEF("device", HAS_ARG, QEMU_OPTION_device,
 470     "-device driver[,prop[=value][,...]]\n"
 471     "                add device (based on driver)\n"
 472     "                prop=value,... sets driver properties\n"
 473     "                use -device ? to print all possible drivers\n"
 474     "                use -device driver,? to print all possible properties\n",
 475     QEMU_ARCH_ALL)
 476 STEXI
 477 @item -device @var{driver}[,@var{prop}[=@var{value}][,...]]
 478 @findex -device
 479 Add device @var{driver}.  @var{prop}=@var{value} sets driver
 480 properties.  Valid properties depend on the driver.  To get help on
 481 possible drivers and properties, use @code{-device ?} and
 482 @code{-device @var{driver},?}.
 483 ETEXI
 484
 485 DEFHEADING(File system options:)
 486
 487 DEF("fsdev", HAS_ARG, QEMU_OPTION_fsdev,
 488     "-fsdev local,id=id,path=path,security_model=[mapped|passthrough]\n",
 489     QEMU_ARCH_ALL)
 490
 491 STEXI
 492
 493 The general form of a File system device option is:
 494 @table @option
 495
 496 @item -fsdev @var{fstype} ,id=@var{id} [,@var{options}]
 497 @findex -fsdev
 498 Fstype is one of:
 499 @option{local},
 500 The specific Fstype will determine the applicable options.
 501
 502 Options to each backend are described below.
 503
 504 @item -fsdev local ,id=@var{id} ,path=@var{path} ,security_model=@var{security_model}
 505
 506 Create a file-system-"device" for local-filesystem.
 507
 508 @option{local} is only available on Linux.
 509
 510 @option{path} specifies the path to be exported. @option{path} is required.
 511
 512 @option{security_model} specifies the security model to be followed.
 513 @option{security_model} is required.
 514
 515 @end table
 516 ETEXI
 517
 518 DEFHEADING(Virtual File system pass-through options:)
 519
 520 DEF("virtfs", HAS_ARG, QEMU_OPTION_virtfs,
 521     "-virtfs local,path=path,mount_tag=tag,security_model=[mapped|passthrough]\n",
 522     QEMU_ARCH_ALL)
 523
 524 STEXI
 525
 526 The general form of a Virtual File system pass-through option is:
 527 @table @option
 528
 529 @item -virtfs @var{fstype} [,@var{options}]
 530 @findex -virtfs
 531 Fstype is one of:
 532 @option{local},
 533 The specific Fstype will determine the applicable options.
 534
 535 Options to each backend are described below.
 536
 537 @item -virtfs local ,path=@var{path} ,mount_tag=@var{mount_tag} ,security_model=@var{security_model}
 538
 539 Create a Virtual file-system-pass through for local-filesystem.
 540
 541 @option{local} is only available on Linux.
 542
 543 @option{path} specifies the path to be exported. @option{path} is required.
 544
 545 @option{security_model} specifies the security model to be followed.
 546 @option{security_model} is required.
 547
 548
 549 @option{mount_tag} specifies the tag with which the exported file is mounted.
 550 @option{mount_tag} is required.
 551
 552 @end table
 553 ETEXI
 554
 555 DEFHEADING()
 556
 557 DEF("name", HAS_ARG, QEMU_OPTION_name,
 558     "-name string1[,process=string2]\n"
 559     "                set the name of the guest\n"
 560     "                string1 sets the window title and string2 the process name (on Linux)\n",
 561     QEMU_ARCH_ALL)
 562 STEXI
 563 @item -name @var{name}
 564 @findex -name
 565 Sets the @var{name} of the guest.
 566 This name will be displayed in the SDL window caption.
 567 The @var{name} will also be used for the VNC server.
 568 Also optionally set the top visible process name in Linux.
 569 ETEXI
 570
 571 DEF("uuid", HAS_ARG, QEMU_OPTION_uuid,
 572     "-uuid %08x-%04x-%04x-%04x-%012x\n"
 573     "                specify machine UUID\n", QEMU_ARCH_ALL)
 574 STEXI
 575 @item -uuid @var{uuid}
 576 @findex -uuid
 577 Set system UUID.
 578 ETEXI
 579
 580 STEXI
 581 @end table
 582 ETEXI
 583
 584 DEFHEADING()
 585
 586 DEFHEADING(Display options:)
 587
 588 STEXI
 589 @table @option
 590 ETEXI
 591
 592 DEF("nographic", 0, QEMU_OPTION_nographic,
 593     "-nographic      disable graphical output and redirect serial I/Os to console\n",
 594     QEMU_ARCH_ALL)
 595 STEXI
 596 @item -nographic
 597 @findex -nographic
 598 Normally, QEMU uses SDL to display the VGA output. With this option,
 599 you can totally disable graphical output so that QEMU is a simple
 600 command line application. The emulated serial port is redirected on
 601 the console. Therefore, you can still use QEMU to debug a Linux kernel
 602 with a serial console.
 603 ETEXI
 604
 605 #ifdef CONFIG_CURSES
 606 DEF("curses", 0, QEMU_OPTION_curses,
 607     "-curses         use a curses/ncurses interface instead of SDL\n",
 608     QEMU_ARCH_ALL)
 609 #endif
 610 STEXI
 611 @item -curses
 612 @findex curses
 613 Normally, QEMU uses SDL to display the VGA output.  With this option,
 614 QEMU can display the VGA output when in text mode using a
 615 curses/ncurses interface.  Nothing is displayed in graphical mode.
 616 ETEXI
 617
 618 #ifdef CONFIG_SDL
 619 DEF("no-frame", 0, QEMU_OPTION_no_frame,
 620     "-no-frame       open SDL window without a frame and window decorations\n",
 621     QEMU_ARCH_ALL)
 622 #endif
 623 STEXI
 624 @item -no-frame
 625 @findex -no-frame
 626 Do not use decorations for SDL windows and start them using the whole
 627 available screen space. This makes the using QEMU in a dedicated desktop
 628 workspace more convenient.
 629 ETEXI
 630
 631 #ifdef CONFIG_SDL
 632 DEF("alt-grab", 0, QEMU_OPTION_alt_grab,
 633     "-alt-grab       use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)\n",
 634     QEMU_ARCH_ALL)
 635 #endif
 636 STEXI
 637 @item -alt-grab
 638 @findex -alt-grab
 639 Use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt).
 640 ETEXI
 641
 642 #ifdef CONFIG_SDL
 643 DEF("ctrl-grab", 0, QEMU_OPTION_ctrl_grab,
 644     "-ctrl-grab      use Right-Ctrl to grab mouse (instead of Ctrl-Alt)\n",
 645     QEMU_ARCH_ALL)
 646 #endif
 647 STEXI
 648 @item -ctrl-grab
 649 @findex -ctrl-grab
 650 Use Right-Ctrl to grab mouse (instead of Ctrl-Alt).
 651 ETEXI
 652
 653 #ifdef CONFIG_SDL
 654 DEF("no-quit", 0, QEMU_OPTION_no_quit,
 655     "-no-quit        disable SDL window close capability\n", QEMU_ARCH_ALL)
 656 #endif
 657 STEXI
 658 @item -no-quit
 659 @findex -no-quit
 660 Disable SDL window close capability.
 661 ETEXI
 662
 663 #ifdef CONFIG_SDL
 664 DEF("sdl", 0, QEMU_OPTION_sdl,
 665     "-sdl            enable SDL\n", QEMU_ARCH_ALL)
 666 #endif
 667 STEXI
 668 @item -sdl
 669 @findex -sdl
 670 Enable SDL.
 671 ETEXI
 672
 673 DEF("portrait", 0, QEMU_OPTION_portrait,
 674     "-portrait       rotate graphical output 90 deg left (only PXA LCD)\n",
 675     QEMU_ARCH_ALL)
 676 STEXI
 677 @item -portrait
 678 @findex -portrait
 679 Rotate graphical output 90 deg left (only PXA LCD).
 680 ETEXI
 681
 682 DEF("vga", HAS_ARG, QEMU_OPTION_vga,
 683     "-vga [std|cirrus|vmware|xenfb|none]\n"
 684     "                select video card type\n", QEMU_ARCH_ALL)
 685 STEXI
 686 @item -vga @var{type}
 687 @findex -vga
 688 Select type of VGA card to emulate. Valid values for @var{type} are
 689 @table @option
 690 @item cirrus
 691 Cirrus Logic GD5446 Video card. All Windows versions starting from
 692 Windows 95 should recognize and use this graphic card. For optimal
 693 performances, use 16 bit color depth in the guest and the host OS.
 694 (This one is the default)
 695 @item std
 696 Standard VGA card with Bochs VBE extensions.  If your guest OS
 697 supports the VESA 2.0 VBE extensions (e.g. Windows XP) and if you want
 698 to use high resolution modes (>= 1280x1024x16) then you should use
 699 this option.
 700 @item vmware
 701 VMWare SVGA-II compatible adapter. Use it if you have sufficiently
 702 recent XFree86/XOrg server or Windows guest with a driver for this
 703 card.
 704 @item none
 705 Disable VGA card.
 706 @end table
 707 ETEXI
 708
 709 DEF("full-screen", 0, QEMU_OPTION_full_screen,
 710     "-full-screen    start in full screen\n", QEMU_ARCH_ALL)
 711 STEXI
 712 @item -full-screen
 713 @findex -full-screen
 714 Start in full screen.
 715 ETEXI
 716
 717 DEF("g", 1, QEMU_OPTION_g ,
 718     "-g WxH[xDEPTH]  Set the initial graphical resolution and depth\n",
 719     QEMU_ARCH_PPC | QEMU_ARCH_SPARC)
 720 STEXI
 721 @item -g @var{width}x@var{height}[x@var{depth}]
 722 @findex -g
 723 Set the initial graphical resolution and depth (PPC, SPARC only).
 724 ETEXI
 725
 726 DEF("vnc", HAS_ARG, QEMU_OPTION_vnc ,
 727     "-vnc display    start a VNC server on display\n", QEMU_ARCH_ALL)
 728 STEXI
 729 @item -vnc @var{display}[,@var{option}[,@var{option}[,...]]]
 730 @findex -vnc
 731 Normally, QEMU uses SDL to display the VGA output.  With this option,
 732 you can have QEMU listen on VNC display @var{display} and redirect the VGA
 733 display over the VNC session.  It is very useful to enable the usb
 734 tablet device when using this option (option @option{-usbdevice
 735 tablet}). When using the VNC display, you must use the @option{-k}
 736 parameter to set the keyboard layout if you are not using en-us. Valid
 737 syntax for the @var{display} is
 738
 739 @table @option
 740
 741 @item @var{host}:@var{d}
 742
 743 TCP connections will only be allowed from @var{host} on display @var{d}.
 744 By convention the TCP port is 5900+@var{d}. Optionally, @var{host} can
 745 be omitted in which case the server will accept connections from any host.
 746
 747 @item unix:@var{path}
 748
 749 Connections will be allowed over UNIX domain sockets where @var{path} is the
 750 location of a unix socket to listen for connections on.
 751
 752 @item none
 753
 754 VNC is initialized but not started. The monitor @code{change} command
 755 can be used to later start the VNC server.
 756
 757 @end table
 758
 759 Following the @var{display} value there may be one or more @var{option} flags
 760 separated by commas. Valid options are
 761
 762 @table @option
 763
 764 @item reverse
 765
 766 Connect to a listening VNC client via a ``reverse'' connection. The
 767 client is specified by the @var{display}. For reverse network
 768 connections (@var{host}:@var{d},@code{reverse}), the @var{d} argument
 769 is a TCP port number, not a display number.
 770
 771 @item password
 772
 773 Require that password based authentication is used for client connections.
 774 The password must be set separately using the @code{change} command in the
 775 @ref{pcsys_monitor}
 776
 777 @item tls
 778
 779 Require that client use TLS when communicating with the VNC server. This
 780 uses anonymous TLS credentials so is susceptible to a man-in-the-middle
 781 attack. It is recommended that this option be combined with either the
 782 @option{x509} or @option{x509verify} options.
 783
 784 @item x509=@var{/path/to/certificate/dir}
 785
 786 Valid if @option{tls} is specified. Require that x509 credentials are used
 787 for negotiating the TLS session. The server will send its x509 certificate
 788 to the client. It is recommended that a password be set on the VNC server
 789 to provide authentication of the client when this is used. The path following
 790 this option specifies where the x509 certificates are to be loaded from.
 791 See the @ref{vnc_security} section for details on generating certificates.
 792
 793 @item x509verify=@var{/path/to/certificate/dir}
 794
 795 Valid if @option{tls} is specified. Require that x509 credentials are used
 796 for negotiating the TLS session. The server will send its x509 certificate
 797 to the client, and request that the client send its own x509 certificate.
 798 The server will validate the client's certificate against the CA certificate,
 799 and reject clients when validation fails. If the certificate authority is
 800 trusted, this is a sufficient authentication mechanism. You may still wish
 801 to set a password on the VNC server as a second authentication layer. The
 802 path following this option specifies where the x509 certificates are to
 803 be loaded from. See the @ref{vnc_security} section for details on generating
 804 certificates.
 805
 806 @item sasl
 807
 808 Require that the client use SASL to authenticate with the VNC server.
 809 The exact choice of authentication method used is controlled from the
 810 system / user's SASL configuration file for the 'qemu' service. This
 811 is typically found in /etc/sasl2/qemu.conf. If running QEMU as an
 812 unprivileged user, an environment variable SASL_CONF_PATH can be used
 813 to make it search alternate locations for the service config.
 814 While some SASL auth methods can also provide data encryption (eg GSSAPI),
 815 it is recommended that SASL always be combined with the 'tls' and
 816 'x509' settings to enable use of SSL and server certificates. This
 817 ensures a data encryption preventing compromise of authentication
 818 credentials. See the @ref{vnc_security} section for details on using
 819 SASL authentication.
 820
 821 @item acl
 822
 823 Turn on access control lists for checking of the x509 client certificate
 824 and SASL party. For x509 certs, the ACL check is made against the
 825 certificate's distinguished name. This is something that looks like
 826 @code{C=GB,O=ACME,L=Boston,CN=bob}. For SASL party, the ACL check is
 827 made against the username, which depending on the SASL plugin, may
 828 include a realm component, eg @code{bob} or @code{bob@@EXAMPLE.COM}.
 829 When the @option{acl} flag is set, the initial access list will be
 830 empty, with a @code{deny} policy. Thus no one will be allowed to
 831 use the VNC server until the ACLs have been loaded. This can be
 832 achieved using the @code{acl} monitor command.
 833
 834 @item lossy
 835
 836 Enable lossy compression methods (gradient, JPEG, ...). If this
 837 option is set, VNC client may receive lossy framebuffer updates
 838 depending on its encoding settings. Enabling this option can save
 839 a lot of bandwidth at the expense of quality.
 840
 841 @end table
 842 ETEXI
 843
 844 STEXI
 845 @end table
 846 ETEXI
 847
 848 DEFHEADING()
 849
 850 DEFHEADING(i386 target only:)
 851 STEXI
 852 @table @option
 853 ETEXI
 854
 855 DEF("win2k-hack", 0, QEMU_OPTION_win2k_hack,
 856     "-win2k-hack     use it when installing Windows 2000 to avoid a disk full bug\n",
 857     QEMU_ARCH_I386)
 858 STEXI
 859 @item -win2k-hack
 860 @findex -win2k-hack
 861 Use it when installing Windows 2000 to avoid a disk full bug. After
 862 Windows 2000 is installed, you no longer need this option (this option
 863 slows down the IDE transfers).
 864 ETEXI
 865
 866 HXCOMM Deprecated by -rtc
 867 DEF("rtc-td-hack", 0, QEMU_OPTION_rtc_td_hack, "", QEMU_ARCH_I386)
 868
 869 DEF("no-fd-bootchk", 0, QEMU_OPTION_no_fd_bootchk,
 870     "-no-fd-bootchk  disable boot signature checking for floppy disks\n",
 871     QEMU_ARCH_I386)
 872 STEXI
 873 @item -no-fd-bootchk
 874 @findex -no-fd-bootchk
 875 Disable boot signature checking for floppy disks in Bochs BIOS. It may
 876 be needed to boot from old floppy disks.
 877 TODO: check reference to Bochs BIOS.
 878 ETEXI
 879
 880 DEF("no-acpi", 0, QEMU_OPTION_no_acpi,
 881            "-no-acpi        disable ACPI\n", QEMU_ARCH_I386)
 882 STEXI
 883 @item -no-acpi
 884 @findex -no-acpi
 885 Disable ACPI (Advanced Configuration and Power Interface) support. Use
 886 it if your guest OS complains about ACPI problems (PC target machine
 887 only).
 888 ETEXI
 889
 890 DEF("no-hpet", 0, QEMU_OPTION_no_hpet,
 891     "-no-hpet        disable HPET\n", QEMU_ARCH_I386)
 892 STEXI
 893 @item -no-hpet
 894 @findex -no-hpet
 895 Disable HPET support.
 896 ETEXI
 897
 898 DEF("balloon", HAS_ARG, QEMU_OPTION_balloon,
 899     "-balloon none   disable balloon device\n"
 900     "-balloon virtio[,addr=str]\n"
 901     "                enable virtio balloon device (default)\n", QEMU_ARCH_ALL)
 902 STEXI
 903 @item -balloon none
 904 @findex -balloon
 905 Disable balloon device.
 906 @item -balloon virtio[,addr=@var{addr}]
 907 Enable virtio balloon device (default), optionally with PCI address
 908 @var{addr}.
 909 ETEXI
 910
 911 DEF("acpitable", HAS_ARG, QEMU_OPTION_acpitable,
 912     "-acpitable [sig=str][,rev=n][,oem_id=str][,oem_table_id=str][,oem_rev=n][,asl_compiler_id=str][,asl_compiler_rev=n][,data=file1[:file2]...]\n"
 913     "                ACPI table description\n", QEMU_ARCH_I386)
 914 STEXI
 915 @item -acpitable [sig=@var{str}][,rev=@var{n}][,oem_id=@var{str}][,oem_table_id=@var{str}][,oem_rev=@var{n}] [,asl_compiler_id=@var{str}][,asl_compiler_rev=@var{n}][,data=@var{file1}[:@var{file2}]...]
 916 @findex -acpitable
 917 Add ACPI table with specified header fields and context from specified files.
 918 ETEXI
 919
 920 DEF("smbios", HAS_ARG, QEMU_OPTION_smbios,
 921     "-smbios file=binary\n"
 922     "                load SMBIOS entry from binary file\n"
 923     "-smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d]\n"
 924     "                specify SMBIOS type 0 fields\n"
 925     "-smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str]\n"
 926     "              [,uuid=uuid][,sku=str][,family=str]\n"
 927     "                specify SMBIOS type 1 fields\n", QEMU_ARCH_I386)
 928 STEXI
 929 @item -smbios file=@var{binary}
 930 @findex -smbios
 931 Load SMBIOS entry from binary file.
 932
 933 @item -smbios type=0[,vendor=@var{str}][,version=@var{str}][,date=@var{str}][,release=@var{%d.%d}]
 934 @findex -smbios
 935 Specify SMBIOS type 0 fields
 936
 937 @item -smbios type=1[,manufacturer=@var{str}][,product=@var{str}] [,version=@var{str}][,serial=@var{str}][,uuid=@var{uuid}][,sku=@var{str}] [,family=@var{str}]
 938 Specify SMBIOS type 1 fields
 939 ETEXI
 940
 941 DEFHEADING()
 942 STEXI
 943 @end table
 944 ETEXI
 945
 946 DEFHEADING(Network options:)
 947 STEXI
 948 @table @option
 949 ETEXI
 950
 951 HXCOMM Legacy slirp options (now moved to -net user):
 952 #ifdef CONFIG_SLIRP
 953 DEF("tftp", HAS_ARG, QEMU_OPTION_tftp, "", QEMU_ARCH_ALL)
 954 DEF("bootp", HAS_ARG, QEMU_OPTION_bootp, "", QEMU_ARCH_ALL)
 955 DEF("redir", HAS_ARG, QEMU_OPTION_redir, "", QEMU_ARCH_ALL)
 956 #ifndef _WIN32
 957 DEF("smb", HAS_ARG, QEMU_OPTION_smb, "", QEMU_ARCH_ALL)
 958 #endif
 959 #endif
 960
 961 DEF("net", HAS_ARG, QEMU_OPTION_net,
 962     "-net nic[,vlan=n][,macaddr=mac][,model=type][,name=str][,addr=str][,vectors=v]\n"
 963     "                create a new Network Interface Card and connect it to VLAN 'n'\n"
 964 #ifdef CONFIG_SLIRP
 965     "-net user[,vlan=n][,name=str][,net=addr[/mask]][,host=addr][,restrict=y|n]\n"
 966     "         [,hostname=host][,dhcpstart=addr][,dns=addr][,tftp=dir][,bootfile=f]\n"
 967     "         [,hostfwd=rule][,guestfwd=rule]"
 968 #ifndef _WIN32
 969                                              "[,smb=dir[,smbserver=addr]]\n"
 970 #endif
 971     "                connect the user mode network stack to VLAN 'n', configure its\n"
 972     "                DHCP server and enabled optional services\n"
 973 #endif
 974 #ifdef _WIN32
 975     "-net tap[,vlan=n][,name=str],ifname=name\n"
 976     "                connect the host TAP network interface to VLAN 'n'\n"
 977 #else
 978     "-net tap[,vlan=n][,name=str][,fd=h][,ifname=name][,script=file][,downscript=dfile][,sndbuf=nbytes][,vnet_hdr=on|off][,vhost=on|off][,vhostfd=h]\n"
 979     "                connect the host TAP network interface to VLAN 'n' and use the\n"
 980     "                network scripts 'file' (default=" DEFAULT_NETWORK_SCRIPT ")\n"
 981     "                and 'dfile' (default=" DEFAULT_NETWORK_DOWN_SCRIPT ")\n"
 982     "                use '[down]script=no' to disable script execution\n"
 983     "                use 'fd=h' to connect to an already opened TAP interface\n"
 984     "                use 'sndbuf=nbytes' to limit the size of the send buffer (the\n"
 985     "                default of 'sndbuf=1048576' can be disabled using 'sndbuf=0')\n"
 986     "                use vnet_hdr=off to avoid enabling the IFF_VNET_HDR tap flag\n"
 987     "                use vnet_hdr=on to make the lack of IFF_VNET_HDR support an error condition\n"
 988     "                use vhost=on to enable experimental in kernel accelerator\n"
 989     "                use 'vhostfd=h' to connect to an already opened vhost net device\n"
 990 #endif
 991     "-net socket[,vlan=n][,name=str][,fd=h][,listen=[host]:port][,connect=host:port]\n"
 992     "                connect the vlan 'n' to another VLAN using a socket connection\n"
 993     "-net socket[,vlan=n][,name=str][,fd=h][,mcast=maddr:port]\n"
 994     "                connect the vlan 'n' to multicast maddr and port\n"
 995 #ifdef CONFIG_VDE
 996     "-net vde[,vlan=n][,name=str][,sock=socketpath][,port=n][,group=groupname][,mode=octalmode]\n"
 997     "                connect the vlan 'n' to port 'n' of a vde switch running\n"
 998     "                on host and listening for incoming connections on 'socketpath'.\n"
 999     "                Use group 'groupname' and mode 'octalmode' to change default\n"
1000     "                ownership and permissions for communication port.\n"
1001 #endif
1002     "-net dump[,vlan=n][,file=f][,len=n]\n"
1003     "                dump traffic on vlan 'n' to file 'f' (max n bytes per packet)\n"
1004     "-net none       use it alone to have zero network devices. If no -net option\n"
1005     "                is provided, the default is '-net nic -net user'\n", QEMU_ARCH_ALL)
1006 DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
1007     "-netdev ["
1008 #ifdef CONFIG_SLIRP
1009     "user|"
1010 #endif
1011     "tap|"
1012 #ifdef CONFIG_VDE
1013     "vde|"
1014 #endif
1015     "socket],id=str[,option][,option][,...]\n", QEMU_ARCH_ALL)
1016 STEXI
1017 @item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}] [,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
1018 @findex -net
1019 Create a new Network Interface Card and connect it to VLAN @var{n} (@var{n}
1020 = 0 is the default). The NIC is an e1000 by default on the PC
1021 target. Optionally, the MAC address can be changed to @var{mac}, the
1022 device address set to @var{addr} (PCI cards only),
1023 and a @var{name} can be assigned for use in monitor commands.
1024 Optionally, for PCI cards, you can specify the number @var{v} of MSI-X vectors
1025 that the card should have; this option currently only affects virtio cards; set
1026 @var{v} = 0 to disable MSI-X. If no @option{-net} option is specified, a single
1027 NIC is created.  Qemu can emulate several different models of network card.
1028 Valid values for @var{type} are
1029 @code{virtio}, @code{i82551}, @code{i82557b}, @code{i82559er},
1030 @code{ne2k_pci}, @code{ne2k_isa}, @code{pcnet}, @code{rtl8139},
1031 @code{e1000}, @code{smc91c111}, @code{lance} and @code{mcf_fec}.
1032 Not all devices are supported on all targets.  Use -net nic,model=?
1033 for a list of available devices for your target.
1034
1035 @item -net user[,@var{option}][,@var{option}][,...]
1036 Use the user mode network stack which requires no administrator
1037 privilege to run. Valid options are:
1038
1039 @table @option
1040 @item vlan=@var{n}
1041 Connect user mode stack to VLAN @var{n} (@var{n} = 0 is the default).
1042
1043 @item name=@var{name}
1044 Assign symbolic name for use in monitor commands.
1045
1046 @item net=@var{addr}[/@var{mask}]
1047 Set IP network address the guest will see. Optionally specify the netmask,
1048 either in the form a.b.c.d or as number of valid top-most bits. Default is
1049 10.0.2.0/8.
1050
1051 @item host=@var{addr}
1052 Specify the guest-visible address of the host. Default is the 2nd IP in the
1053 guest network, i.e. x.x.x.2.
1054
1055 @item restrict=y|yes|n|no
1056 If this options is enabled, the guest will be isolated, i.e. it will not be
1057 able to contact the host and no guest IP packets will be routed over the host
1058 to the outside. This option does not affect explicitly set forwarding rule.
1059
1060 @item hostname=@var{name}
1061 Specifies the client hostname reported by the builtin DHCP server.
1062
1063 @item dhcpstart=@var{addr}
1064 Specify the first of the 16 IPs the built-in DHCP server can assign. Default
1065 is the 16th to 31st IP in the guest network, i.e. x.x.x.16 to x.x.x.31.
1066
1067 @item dns=@var{addr}
1068 Specify the guest-visible address of the virtual nameserver. The address must
1069 be different from the host address. Default is the 3rd IP in the guest network,
1070 i.e. x.x.x.3.
1071
1072 @item tftp=@var{dir}
1073 When using the user mode network stack, activate a built-in TFTP
1074 server. The files in @var{dir} will be exposed as the root of a TFTP server.
1075 The TFTP client on the guest must be configured in binary mode (use the command
1076 @code{bin} of the Unix TFTP client).
1077
1078 @item bootfile=@var{file}
1079 When using the user mode network stack, broadcast @var{file} as the BOOTP
1080 filename. In conjunction with @option{tftp}, this can be used to network boot
1081 a guest from a local directory.
1082
1083 Example (using pxelinux):
1084 @example
1085 qemu -hda linux.img -boot n -net user,tftp=/path/to/tftp/files,bootfile=/pxelinux.0
1086 @end example
1087
1088 @item smb=@var{dir}[,smbserver=@var{addr}]
1089 When using the user mode network stack, activate a built-in SMB
1090 server so that Windows OSes can access to the host files in @file{@var{dir}}
1091 transparently. The IP address of the SMB server can be set to @var{addr}. By
1092 default the 4th IP in the guest network is used, i.e. x.x.x.4.
1093
1094 In the guest Windows OS, the line:
1095 @example
1096 10.0.2.4 smbserver
1097 @end example
1098 must be added in the file @file{C:\WINDOWS\LMHOSTS} (for windows 9x/Me)
1099 or @file{C:\WINNT\SYSTEM32\DRIVERS\ETC\LMHOSTS} (Windows NT/2000).
1100
1101 Then @file{@var{dir}} can be accessed in @file{\\smbserver\qemu}.
1102
1103 Note that a SAMBA server must be installed on the host OS in
1104 @file{/usr/sbin/smbd}. QEMU was tested successfully with smbd versions from
1105 Red Hat 9, Fedora Core 3 and OpenSUSE 11.x.
1106
1107 @item hostfwd=[tcp|udp]:[@var{hostaddr}]:@var{hostport}-[@var{guestaddr}]:@var{guestport}
1108 Redirect incoming TCP or UDP connections to the host port @var{hostport} to
1109 the guest IP address @var{guestaddr} on guest port @var{guestport}. If
1110 @var{guestaddr} is not specified, its value is x.x.x.15 (default first address
1111 given by the built-in DHCP server). By specifying @var{hostaddr}, the rule can
1112 be bound to a specific host interface. If no connection type is set, TCP is
1113 used. This option can be given multiple times.
1114
1115 For example, to redirect host X11 connection from screen 1 to guest
1116 screen 0, use the following:
1117
1118 @example
1119 # on the host
1120 qemu -net user,hostfwd=tcp:127.0.0.1:6001-:6000 [...]
1121 # this host xterm should open in the guest X11 server
1122 xterm -display :1
1123 @end example
1124
1125 To redirect telnet connections from host port 5555 to telnet port on
1126 the guest, use the following:
1127
1128 @example
1129 # on the host
1130 qemu -net user,hostfwd=tcp::5555-:23 [...]
1131 telnet localhost 5555
1132 @end example
1133
1134 Then when you use on the host @code{telnet localhost 5555}, you
1135 connect to the guest telnet server.
1136
1137 @item guestfwd=[tcp]:@var{server}:@var{port}-@var{dev}
1138 Forward guest TCP connections to the IP address @var{server} on port @var{port}
1139 to the character device @var{dev}. This option can be given multiple times.
1140
1141 @end table
1142
1143 Note: Legacy stand-alone options -tftp, -bootp, -smb and -redir are still
1144 processed and applied to -net user. Mixing them with the new configuration
1145 syntax gives undefined results. Their use for new applications is discouraged
1146 as they will be removed from future versions.
1147
1148 @item -net tap[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,ifname=@var{name}] [,script=@var{file}][,downscript=@var{dfile}]
1149 Connect the host TAP network interface @var{name} to VLAN @var{n}, use
1150 the network script @var{file} to configure it and the network script
1151 @var{dfile} to deconfigure it. If @var{name} is not provided, the OS
1152 automatically provides one. @option{fd}=@var{h} can be used to specify
1153 the handle of an already opened host TAP interface. The default network
1154 configure script is @file{/etc/qemu-ifup} and the default network
1155 deconfigure script is @file{/etc/qemu-ifdown}. Use @option{script=no}
1156 or @option{downscript=no} to disable script execution. Example:
1157
1158 @example
1159 qemu linux.img -net nic -net tap
1160 @end example
1161
1162 More complicated example (two NICs, each one connected to a TAP device)
1163 @example
1164 qemu linux.img -net nic,vlan=0 -net tap,vlan=0,ifname=tap0 \
1165                -net nic,vlan=1 -net tap,vlan=1,ifname=tap1
1166 @end example
1167
1168 @item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,listen=[@var{host}]:@var{port}][,connect=@var{host}:@var{port}]
1169
1170 Connect the VLAN @var{n} to a remote VLAN in another QEMU virtual
1171 machine using a TCP socket connection. If @option{listen} is
1172 specified, QEMU waits for incoming connections on @var{port}
1173 (@var{host} is optional). @option{connect} is used to connect to
1174 another QEMU instance using the @option{listen} option. @option{fd}=@var{h}
1175 specifies an already opened TCP socket.
1176
1177 Example:
1178 @example
1179 # launch a first QEMU instance
1180 qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
1181                -net socket,listen=:1234
1182 # connect the VLAN 0 of this instance to the VLAN 0
1183 # of the first instance
1184 qemu linux.img -net nic,macaddr=52:54:00:12:34:57 \
1185                -net socket,connect=127.0.0.1:1234
1186 @end example
1187
1188 @item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,mcast=@var{maddr}:@var{port}]
1189
1190 Create a VLAN @var{n} shared with another QEMU virtual
1191 machines using a UDP multicast socket, effectively making a bus for
1192 every QEMU with same multicast address @var{maddr} and @var{port}.
1193 NOTES:
1194 @enumerate
1195 @item
1196 Several QEMU can be running on different hosts and share same bus (assuming
1197 correct multicast setup for these hosts).
1198 @item
1199 mcast support is compatible with User Mode Linux (argument @option{eth@var{N}=mcast}), see
1200 @url{http://user-mode-linux.sf.net}.
1201 @item
1202 Use @option{fd=h} to specify an already opened UDP multicast socket.
1203 @end enumerate
1204
1205 Example:
1206 @example
1207 # launch one QEMU instance
1208 qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
1209                -net socket,mcast=230.0.0.1:1234
1210 # launch another QEMU instance on same "bus"
1211 qemu linux.img -net nic,macaddr=52:54:00:12:34:57 \
1212                -net socket,mcast=230.0.0.1:1234
1213 # launch yet another QEMU instance on same "bus"
1214 qemu linux.img -net nic,macaddr=52:54:00:12:34:58 \
1215                -net socket,mcast=230.0.0.1:1234
1216 @end example
1217
1218 Example (User Mode Linux compat.):
1219 @example
1220 # launch QEMU instance (note mcast address selected
1221 # is UML's default)
1222 qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
1223                -net socket,mcast=239.192.168.1:1102
1224 # launch UML
1225 /path/to/linux ubd0=/path/to/root_fs eth0=mcast
1226 @end example
1227
1228 @item -net vde[,vlan=@var{n}][,name=@var{name}][,sock=@var{socketpath}] [,port=@var{n}][,group=@var{groupname}][,mode=@var{octalmode}]
1229 Connect VLAN @var{n} to PORT @var{n} of a vde switch running on host and
1230 listening for incoming connections on @var{socketpath}. Use GROUP @var{groupname}
1231 and MODE @var{octalmode} to change default ownership and permissions for
1232 communication port. This option is available only if QEMU has been compiled
1233 with vde support enabled.
1234
1235 Example:
1236 @example
1237 # launch vde switch
1238 vde_switch -F -sock /tmp/myswitch
1239 # launch QEMU instance
1240 qemu linux.img -net nic -net vde,sock=/tmp/myswitch
1241 @end example
1242
1243 @item -net dump[,vlan=@var{n}][,file=@var{file}][,len=@var{len}]
1244 Dump network traffic on VLAN @var{n} to file @var{file} (@file{qemu-vlan0.pcap} by default).
1245 At most @var{len} bytes (64k by default) per packet are stored. The file format is
1246 libpcap, so it can be analyzed with tools such as tcpdump or Wireshark.
1247
1248 @item -net none
1249 Indicate that no network devices should be configured. It is used to
1250 override the default configuration (@option{-net nic -net user}) which
1251 is activated if no @option{-net} options are provided.
1252
1253 @end table
1254 ETEXI
1255
1256 DEFHEADING()
1257
1258 DEFHEADING(Character device options:)
1259
1260 DEF("chardev", HAS_ARG, QEMU_OPTION_chardev,
1261     "-chardev null,id=id[,mux=on|off]\n"
1262     "-chardev socket,id=id[,host=host],port=host[,to=to][,ipv4][,ipv6][,nodelay]\n"
1263     "         [,server][,nowait][,telnet][,mux=on|off] (tcp)\n"
1264     "-chardev socket,id=id,path=path[,server][,nowait][,telnet],[mux=on|off] (unix)\n"
1265     "-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]\n"
1266     "         [,localport=localport][,ipv4][,ipv6][,mux=on|off]\n"
1267     "-chardev msmouse,id=id[,mux=on|off]\n"
1268     "-chardev vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]\n"
1269     "         [,mux=on|off]\n"
1270     "-chardev file,id=id,path=path[,mux=on|off]\n"
1271     "-chardev pipe,id=id,path=path[,mux=on|off]\n"
1272 #ifdef _WIN32
1273     "-chardev console,id=id[,mux=on|off]\n"
1274     "-chardev serial,id=id,path=path[,mux=on|off]\n"
1275 #else
1276     "-chardev pty,id=id[,mux=on|off]\n"
1277     "-chardev stdio,id=id[,mux=on|off][,signal=on|off]\n"
1278 #endif
1279 #ifdef CONFIG_BRLAPI
1280     "-chardev braille,id=id[,mux=on|off]\n"
1281 #endif
1282 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1283         || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
1284     "-chardev tty,id=id,path=path[,mux=on|off]\n"
1285 #endif
1286 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__)
1287     "-chardev parport,id=id,path=path[,mux=on|off]\n"
1288 #endif
1289     , QEMU_ARCH_ALL
1290 )
1291
1292 STEXI
1293
1294 The general form of a character device option is:
1295 @table @option
1296
1297 @item -chardev @var{backend} ,id=@var{id} [,mux=on|off] [,@var{options}]
1298 @findex -chardev
1299 Backend is one of:
1300 @option{null},
1301 @option{socket},
1302 @option{udp},
1303 @option{msmouse},
1304 @option{vc},
1305 @option{file},
1306 @option{pipe},
1307 @option{console},
1308 @option{serial},
1309 @option{pty},
1310 @option{stdio},
1311 @option{braille},
1312 @option{tty},
1313 @option{parport}.
1314 The specific backend will determine the applicable options.
1315
1316 All devices must have an id, which can be any string up to 127 characters long.
1317 It is used to uniquely identify this device in other command line directives.
1318
1319 A character device may be used in multiplexing mode by multiple front-ends.
1320 The key sequence of @key{Control-a} and @key{c} will rotate the input focus
1321 between attached front-ends. Specify @option{mux=on} to enable this mode.
1322
1323 Options to each backend are described below.
1324
1325 @item -chardev null ,id=@var{id}
1326 A void device. This device will not emit any data, and will drop any data it
1327 receives. The null backend does not take any options.
1328
1329 @item -chardev socket ,id=@var{id} [@var{TCP options} or @var{unix options}] [,server] [,nowait] [,telnet]
1330
1331 Create a two-way stream socket, which can be either a TCP or a unix socket. A
1332 unix socket will be created if @option{path} is specified. Behaviour is
1333 undefined if TCP options are specified for a unix socket.
1334
1335 @option{server} specifies that the socket shall be a listening socket.
1336
1337 @option{nowait} specifies that QEMU should not block waiting for a client to
1338 connect to a listening socket.
1339
1340 @option{telnet} specifies that traffic on the socket should interpret telnet
1341 escape sequences.
1342
1343 TCP and unix socket options are given below:
1344
1345 @table @option
1346
1347 @item TCP options: port=@var{port} [,host=@var{host}] [,to=@var{to}] [,ipv4] [,ipv6] [,nodelay]
1348
1349 @option{host} for a listening socket specifies the local address to be bound.
1350 For a connecting socket species the remote host to connect to. @option{host} is
1351 optional for listening sockets. If not specified it defaults to @code{0.0.0.0}.
1352
1353 @option{port} for a listening socket specifies the local port to be bound. For a
1354 connecting socket specifies the port on the remote host to connect to.
1355 @option{port} can be given as either a port number or a service name.
1356 @option{port} is required.
1357
1358 @option{to} is only relevant to listening sockets. If it is specified, and
1359 @option{port} cannot be bound, QEMU will attempt to bind to subsequent ports up
1360 to and including @option{to} until it succeeds. @option{to} must be specified
1361 as a port number.
1362
1363 @option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used.
1364 If neither is specified the socket may use either protocol.
1365
1366 @option{nodelay} disables the Nagle algorithm.
1367
1368 @item unix options: path=@var{path}
1369
1370 @option{path} specifies the local path of the unix socket. @option{path} is
1371 required.
1372
1373 @end table
1374
1375 @item -chardev udp ,id=@var{id} [,host=@var{host}] ,port=@var{port} [,localaddr=@var{localaddr}] [,localport=@var{localport}] [,ipv4] [,ipv6]
1376
1377 Sends all traffic from the guest to a remote host over UDP.
1378
1379 @option{host} specifies the remote host to connect to. If not specified it
1380 defaults to @code{localhost}.
1381
1382 @option{port} specifies the port on the remote host to connect to. @option{port}
1383 is required.
1384
1385 @option{localaddr} specifies the local address to bind to. If not specified it
1386 defaults to @code{0.0.0.0}.
1387
1388 @option{localport} specifies the local port to bind to. If not specified any
1389 available local port will be used.
1390
1391 @option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used.
1392 If neither is specified the device may use either protocol.
1393
1394 @item -chardev msmouse ,id=@var{id}
1395
1396 Forward QEMU's emulated msmouse events to the guest. @option{msmouse} does not
1397 take any options.
1398
1399 @item -chardev vc ,id=@var{id} [[,width=@var{width}] [,height=@var{height}]] [[,cols=@var{cols}] [,rows=@var{rows}]]
1400
1401 Connect to a QEMU text console. @option{vc} may optionally be given a specific
1402 size.
1403
1404 @option{width} and @option{height} specify the width and height respectively of
1405 the console, in pixels.
1406
1407 @option{cols} and @option{rows} specify that the console be sized to fit a text
1408 console with the given dimensions.
1409
1410 @item -chardev file ,id=@var{id} ,path=@var{path}
1411
1412 Log all traffic received from the guest to a file.
1413
1414 @option{path} specifies the path of the file to be opened. This file will be
1415 created if it does not already exist, and overwritten if it does. @option{path}
1416 is required.
1417
1418 @item -chardev pipe ,id=@var{id} ,path=@var{path}
1419
1420 Create a two-way connection to the guest. The behaviour differs slightly between
1421 Windows hosts and other hosts:
1422
1423 On Windows, a single duplex pipe will be created at
1424 @file{\\.pipe\@option{path}}.
1425
1426 On other hosts, 2 pipes will be created called @file{@option{path}.in} and
1427 @file{@option{path}.out}. Data written to @file{@option{path}.in} will be
1428 received by the guest. Data written by the guest can be read from
1429 @file{@option{path}.out}. QEMU will not create these fifos, and requires them to
1430 be present.
1431
1432 @option{path} forms part of the pipe path as described above. @option{path} is
1433 required.
1434
1435 @item -chardev console ,id=@var{id}
1436
1437 Send traffic from the guest to QEMU's standard output. @option{console} does not
1438 take any options.
1439
1440 @option{console} is only available on Windows hosts.
1441
1442 @item -chardev serial ,id=@var{id} ,path=@option{path}
1443
1444 Send traffic from the guest to a serial device on the host.
1445
1446 @option{serial} is
1447 only available on Windows hosts.
1448
1449 @option{path} specifies the name of the serial device to open.
1450
1451 @item -chardev pty ,id=@var{id}
1452
1453 Create a new pseudo-terminal on the host and connect to it. @option{pty} does
1454 not take any options.
1455
1456 @option{pty} is not available on Windows hosts.
1457
1458 @item -chardev stdio ,id=@var{id} [,signal=on|off]
1459 Connect to standard input and standard output of the qemu process.
1460
1461 @option{signal} controls if signals are enabled on the terminal, that includes
1462 exiting QEMU with the key sequence @key{Control-c}. This option is enabled by
1463 default, use @option{signal=off} to disable it.
1464
1465 @option{stdio} is not available on Windows hosts.
1466
1467 @item -chardev braille ,id=@var{id}
1468
1469 Connect to a local BrlAPI server. @option{braille} does not take any options.
1470
1471 @item -chardev tty ,id=@var{id} ,path=@var{path}
1472
1473 Connect to a local tty device.
1474
1475 @option{tty} is only available on Linux, Sun, FreeBSD, NetBSD, OpenBSD and
1476 DragonFlyBSD hosts.
1477
1478 @option{path} specifies the path to the tty. @option{path} is required.
1479
1480 @item -chardev parport ,id=@var{id} ,path=@var{path}
1481
1482 @option{parport} is only available on Linux, FreeBSD and DragonFlyBSD hosts.
1483
1484 Connect to a local parallel port.
1485
1486 @option{path} specifies the path to the parallel port device. @option{path} is
1487 required.
1488
1489 @end table
1490 ETEXI
1491
1492 DEFHEADING()
1493
1494 DEFHEADING(Bluetooth(R) options:)
1495
1496 DEF("bt", HAS_ARG, QEMU_OPTION_bt, \
1497     "-bt hci,null    dumb bluetooth HCI - doesn't respond to commands\n" \
1498     "-bt hci,host[:id]\n" \
1499     "                use host's HCI with the given name\n" \
1500     "-bt hci[,vlan=n]\n" \
1501     "                emulate a standard HCI in virtual scatternet 'n'\n" \
1502     "-bt vhci[,vlan=n]\n" \
1503     "                add host computer to virtual scatternet 'n' using VHCI\n" \
1504     "-bt device:dev[,vlan=n]\n" \
1505     "                emulate a bluetooth device 'dev' in scatternet 'n'\n",
1506     QEMU_ARCH_ALL)
1507 STEXI
1508 @table @option
1509
1510 @item -bt hci[...]
1511 @findex -bt
1512 Defines the function of the corresponding Bluetooth HCI.  -bt options
1513 are matched with the HCIs present in the chosen machine type.  For
1514 example when emulating a machine with only one HCI built into it, only
1515 the first @code{-bt hci[...]} option is valid and defines the HCI's
1516 logic.  The Transport Layer is decided by the machine type.  Currently
1517 the machines @code{n800} and @code{n810} have one HCI and all other
1518 machines have none.
1519
1520 @anchor{bt-hcis}
1521 The following three types are recognized:
1522
1523 @table @option
1524 @item -bt hci,null
1525 (default) The corresponding Bluetooth HCI assumes no internal logic
1526 and will not respond to any HCI commands or emit events.
1527
1528 @item -bt hci,host[:@var{id}]
1529 (@code{bluez} only) The corresponding HCI passes commands / events
1530 to / from the physical HCI identified by the name @var{id} (default:
1531 @code{hci0}) on the computer running QEMU.  Only available on @code{bluez}
1532 capable systems like Linux.
1533
1534 @item -bt hci[,vlan=@var{n}]
1535 Add a virtual, standard HCI that will participate in the Bluetooth
1536 scatternet @var{n} (default @code{0}).  Similarly to @option{-net}
1537 VLANs, devices inside a bluetooth network @var{n} can only communicate
1538 with other devices in the same network (scatternet).
1539 @end table
1540
1541 @item -bt vhci[,vlan=@var{n}]
1542 (Linux-host only) Create a HCI in scatternet @var{n} (default 0) attached
1543 to the host bluetooth stack instead of to the emulated target.  This
1544 allows the host and target machines to participate in a common scatternet
1545 and communicate.  Requires the Linux @code{vhci} driver installed.  Can
1546 be used as following:
1547
1548 @example
1549 qemu [...OPTIONS...] -bt hci,vlan=5 -bt vhci,vlan=5
1550 @end example
1551
1552 @item -bt device:@var{dev}[,vlan=@var{n}]
1553 Emulate a bluetooth device @var{dev} and place it in network @var{n}
1554 (default @code{0}).  QEMU can only emulate one type of bluetooth devices
1555 currently:
1556
1557 @table @option
1558 @item keyboard
1559 Virtual wireless keyboard implementing the HIDP bluetooth profile.
1560 @end table
1561 @end table
1562 ETEXI
1563
1564 DEFHEADING()
1565
1566 DEFHEADING(Linux/Multiboot boot specific:)
1567 STEXI
1568
1569 When using these options, you can use a given Linux or Multiboot
1570 kernel without installing it in the disk image. It can be useful
1571 for easier testing of various kernels.
1572
1573 @table @option
1574 ETEXI
1575
1576 DEF("kernel", HAS_ARG, QEMU_OPTION_kernel, \
1577     "-kernel bzImage use 'bzImage' as kernel image\n", QEMU_ARCH_ALL)
1578 STEXI
1579 @item -kernel @var{bzImage}
1580 @findex -kernel
1581 Use @var{bzImage} as kernel image. The kernel can be either a Linux kernel
1582 or in multiboot format.
1583 ETEXI
1584
1585 DEF("append", HAS_ARG, QEMU_OPTION_append, \
1586     "-append cmdline use 'cmdline' as kernel command line\n", QEMU_ARCH_ALL)
1587 STEXI
1588 @item -append @var{cmdline}
1589 @findex -append
1590 Use @var{cmdline} as kernel command line
1591 ETEXI
1592
1593 DEF("initrd", HAS_ARG, QEMU_OPTION_initrd, \
1594            "-initrd file    use 'file' as initial ram disk\n", QEMU_ARCH_ALL)
1595 STEXI
1596 @item -initrd @var{file}
1597 @findex -initrd
1598 Use @var{file} as initial ram disk.
1599
1600 @item -initrd "@var{file1} arg=foo,@var{file2}"
1601
1602 This syntax is only available with multiboot.
1603
1604 Use @var{file1} and @var{file2} as modules and pass arg=foo as parameter to the
1605 first module.
1606 ETEXI
1607
1608 STEXI
1609 @end table
1610 ETEXI
1611
1612 DEFHEADING()
1613
1614 DEFHEADING(Debug/Expert options:)
1615
1616 STEXI
1617 @table @option
1618 ETEXI
1619
1620 DEF("serial", HAS_ARG, QEMU_OPTION_serial, \
1621     "-serial dev     redirect the serial port to char device 'dev'\n",
1622     QEMU_ARCH_ALL)
1623 STEXI
1624 @item -serial @var{dev}
1625 @findex -serial
1626 Redirect the virtual serial port to host character device
1627 @var{dev}. The default device is @code{vc} in graphical mode and
1628 @code{stdio} in non graphical mode.
1629
1630 This option can be used several times to simulate up to 4 serial
1631 ports.
1632
1633 Use @code{-serial none} to disable all serial ports.
1634
1635 Available character devices are:
1636 @table @option
1637 @item vc[:@var{W}x@var{H}]
1638 Virtual console. Optionally, a width and height can be given in pixel with
1639 @example
1640 vc:800x600
1641 @end example
1642 It is also possible to specify width or height in characters:
1643 @example
1644 vc:80Cx24C
1645 @end example
1646 @item pty
1647 [Linux only] Pseudo TTY (a new PTY is automatically allocated)
1648 @item none
1649 No device is allocated.
1650 @item null
1651 void device
1652 @item /dev/XXX
1653 [Linux only] Use host tty, e.g. @file{/dev/ttyS0}. The host serial port
1654 parameters are set according to the emulated ones.
1655 @item /dev/parport@var{N}
1656 [Linux only, parallel port only] Use host parallel port
1657 @var{N}. Currently SPP and EPP parallel port features can be used.
1658 @item file:@var{filename}
1659 Write output to @var{filename}. No character can be read.
1660 @item stdio
1661 [Unix only] standard input/output
1662 @item pipe:@var{filename}
1663 name pipe @var{filename}
1664 @item COM@var{n}
1665 [Windows only] Use host serial port @var{n}
1666 @item udp:[@var{remote_host}]:@var{remote_port}[@@[@var{src_ip}]:@var{src_port}]
1667 This implements UDP Net Console.
1668 When @var{remote_host} or @var{src_ip} are not specified
1669 they default to @code{0.0.0.0}.
1670 When not using a specified @var{src_port} a random port is automatically chosen.
1671
1672 If you just want a simple readonly console you can use @code{netcat} or
1673 @code{nc}, by starting qemu with: @code{-serial udp::4555} and nc as:
1674 @code{nc -u -l -p 4555}. Any time qemu writes something to that port it
1675 will appear in the netconsole session.
1676
1677 If you plan to send characters back via netconsole or you want to stop
1678 and start qemu a lot of times, you should have qemu use the same
1679 source port each time by using something like @code{-serial
1680 udp::4555@@:4556} to qemu. Another approach is to use a patched
1681 version of netcat which can listen to a TCP port and send and receive
1682 characters via udp.  If you have a patched version of netcat which
1683 activates telnet remote echo and single char transfer, then you can
1684 use the following options to step up a netcat redirector to allow
1685 telnet on port 5555 to access the qemu port.
1686 @table @code
1687 @item Qemu Options:
1688 -serial udp::4555@@:4556
1689 @item netcat options:
1690 -u -P 4555 -L 0.0.0.0:4556 -t -p 5555 -I -T
1691 @item telnet options:
1692 localhost 5555
1693 @end table
1694
1695 @item tcp:[@var{host}]:@var{port}[,@var{server}][,nowait][,nodelay]
1696 The TCP Net Console has two modes of operation.  It can send the serial
1697 I/O to a location or wait for a connection from a location.  By default
1698 the TCP Net Console is sent to @var{host} at the @var{port}.  If you use
1699 the @var{server} option QEMU will wait for a client socket application
1700 to connect to the port before continuing, unless the @code{nowait}
1701 option was specified.  The @code{nodelay} option disables the Nagle buffering
1702 algorithm.  If @var{host} is omitted, 0.0.0.0 is assumed. Only
1703 one TCP connection at a time is accepted. You can use @code{telnet} to
1704 connect to the corresponding character device.
1705 @table @code
1706 @item Example to send tcp console to 192.168.0.2 port 4444
1707 -serial tcp:192.168.0.2:4444
1708 @item Example to listen and wait on port 4444 for connection
1709 -serial tcp::4444,server
1710 @item Example to not wait and listen on ip 192.168.0.100 port 4444
1711 -serial tcp:192.168.0.100:4444,server,nowait
1712 @end table
1713
1714 @item telnet:@var{host}:@var{port}[,server][,nowait][,nodelay]
1715 The telnet protocol is used instead of raw tcp sockets.  The options
1716 work the same as if you had specified @code{-serial tcp}.  The
1717 difference is that the port acts like a telnet server or client using
1718 telnet option negotiation.  This will also allow you to send the
1719 MAGIC_SYSRQ sequence if you use a telnet that supports sending the break
1720 sequence.  Typically in unix telnet you do it with Control-] and then
1721 type "send break" followed by pressing the enter key.
1722
1723 @item unix:@var{path}[,server][,nowait]
1724 A unix domain socket is used instead of a tcp socket.  The option works the
1725 same as if you had specified @code{-serial tcp} except the unix domain socket
1726 @var{path} is used for connections.
1727
1728 @item mon:@var{dev_string}
1729 This is a special option to allow the monitor to be multiplexed onto
1730 another serial port.  The monitor is accessed with key sequence of
1731 @key{Control-a} and then pressing @key{c}. See monitor access
1732 @ref{pcsys_keys} in the -nographic section for more keys.
1733 @var{dev_string} should be any one of the serial devices specified
1734 above.  An example to multiplex the monitor onto a telnet server
1735 listening on port 4444 would be:
1736 @table @code
1737 @item -serial mon:telnet::4444,server,nowait
1738 @end table
1739
1740 @item braille
1741 Braille device.  This will use BrlAPI to display the braille output on a real
1742 or fake device.
1743
1744 @item msmouse
1745 Three button serial mouse. Configure the guest to use Microsoft protocol.
1746 @end table
1747 ETEXI
1748
1749 DEF("parallel", HAS_ARG, QEMU_OPTION_parallel, \
1750     "-parallel dev   redirect the parallel port to char device 'dev'\n",
1751     QEMU_ARCH_ALL)
1752 STEXI
1753 @item -parallel @var{dev}
1754 @findex -parallel
1755 Redirect the virtual parallel port to host device @var{dev} (same
1756 devices as the serial port). On Linux hosts, @file{/dev/parportN} can
1757 be used to use hardware devices connected on the corresponding host
1758 parallel port.
1759
1760 This option can be used several times to simulate up to 3 parallel
1761 ports.
1762
1763 Use @code{-parallel none} to disable all parallel ports.
1764 ETEXI
1765
1766 DEF("monitor", HAS_ARG, QEMU_OPTION_monitor, \
1767     "-monitor dev    redirect the monitor to char device 'dev'\n",
1768     QEMU_ARCH_ALL)
1769 STEXI
1770 @item -monitor @var{dev}
1771 @findex -monitor
1772 Redirect the monitor to host device @var{dev} (same devices as the
1773 serial port).
1774 The default device is @code{vc} in graphical mode and @code{stdio} in
1775 non graphical mode.
1776 ETEXI
1777 DEF("qmp", HAS_ARG, QEMU_OPTION_qmp, \
1778     "-qmp dev        like -monitor but opens in 'control' mode\n",
1779     QEMU_ARCH_ALL)
1780 STEXI
1781 @item -qmp @var{dev}
1782 @findex -qmp
1783 Like -monitor but opens in 'control' mode.
1784 ETEXI
1785
1786 DEF("mon", HAS_ARG, QEMU_OPTION_mon, \
1787     "-mon chardev=[name][,mode=readline|control][,default]\n", QEMU_ARCH_ALL)
1788 STEXI
1789 @item -mon chardev=[name][,mode=readline|control][,default]
1790 @findex -mon
1791 Setup monitor on chardev @var{name}.
1792 ETEXI
1793
1794 DEF("debugcon", HAS_ARG, QEMU_OPTION_debugcon, \
1795     "-debugcon dev   redirect the debug console to char device 'dev'\n",
1796     QEMU_ARCH_ALL)
1797 STEXI
1798 @item -debugcon @var{dev}
1799 @findex -debugcon
1800 Redirect the debug console to host device @var{dev} (same devices as the
1801 serial port).  The debug console is an I/O port which is typically port
1802 0xe9; writing to that I/O port sends output to this device.
1803 The default device is @code{vc} in graphical mode and @code{stdio} in
1804 non graphical mode.
1805 ETEXI
1806
1807 DEF("pidfile", HAS_ARG, QEMU_OPTION_pidfile, \
1808     "-pidfile file   write PID to 'file'\n", QEMU_ARCH_ALL)
1809 STEXI
1810 @item -pidfile @var{file}
1811 @findex -pidfile
1812 Store the QEMU process PID in @var{file}. It is useful if you launch QEMU
1813 from a script.
1814 ETEXI
1815
1816 DEF("singlestep", 0, QEMU_OPTION_singlestep, \
1817     "-singlestep     always run in singlestep mode\n", QEMU_ARCH_ALL)
1818 STEXI
1819 @item -singlestep
1820 @findex -singlestep
1821 Run the emulation in single step mode.
1822 ETEXI
1823
1824 DEF("S", 0, QEMU_OPTION_S, \
1825     "-S              freeze CPU at startup (use 'c' to start execution)\n",
1826     QEMU_ARCH_ALL)
1827 STEXI
1828 @item -S
1829 @findex -S
1830 Do not start CPU at startup (you must type 'c' in the monitor).
1831 ETEXI
1832
1833 DEF("gdb", HAS_ARG, QEMU_OPTION_gdb, \
1834     "-gdb dev        wait for gdb connection on 'dev'\n", QEMU_ARCH_ALL)
1835 STEXI
1836 @item -gdb @var{dev}
1837 @findex -gdb
1838 Wait for gdb connection on device @var{dev} (@pxref{gdb_usage}). Typical
1839 connections will likely be TCP-based, but also UDP, pseudo TTY, or even
1840 stdio are reasonable use case. The latter is allowing to start qemu from
1841 within gdb and establish the connection via a pipe:
1842 @example
1843 (gdb) target remote | exec qemu -gdb stdio ...
1844 @end example
1845 ETEXI
1846
1847 DEF("s", 0, QEMU_OPTION_s, \
1848     "-s              shorthand for -gdb tcp::" DEFAULT_GDBSTUB_PORT "\n",
1849     QEMU_ARCH_ALL)
1850 STEXI
1851 @item -s
1852 @findex -s
1853 Shorthand for -gdb tcp::1234, i.e. open a gdbserver on TCP port 1234
1854 (@pxref{gdb_usage}).
1855 ETEXI
1856
1857 DEF("d", HAS_ARG, QEMU_OPTION_d, \
1858     "-d item1,...    output log to /tmp/qemu.log (use -d ? for a list of log items)\n",
1859     QEMU_ARCH_ALL)
1860 STEXI
1861 @item -d
1862 @findex -d
1863 Output log in /tmp/qemu.log
1864 ETEXI
1865
1866 DEF("hdachs", HAS_ARG, QEMU_OPTION_hdachs, \
1867     "-hdachs c,h,s[,t]\n" \
1868     "                force hard disk 0 physical geometry and the optional BIOS\n" \
1869     "                translation (t=none or lba) (usually qemu can guess them)\n",
1870     QEMU_ARCH_ALL)
1871 STEXI
1872 @item -hdachs @var{c},@var{h},@var{s},[,@var{t}]
1873 @findex -hdachs
1874 Force hard disk 0 physical geometry (1 <= @var{c} <= 16383, 1 <=
1875 @var{h} <= 16, 1 <= @var{s} <= 63) and optionally force the BIOS
1876 translation mode (@var{t}=none, lba or auto). Usually QEMU can guess
1877 all those parameters. This option is useful for old MS-DOS disk
1878 images.
1879 ETEXI
1880
1881 DEF("L", HAS_ARG, QEMU_OPTION_L, \
1882     "-L path         set the directory for the BIOS, VGA BIOS and keymaps\n",
1883     QEMU_ARCH_ALL)
1884 STEXI
1885 @item -L  @var{path}
1886 @findex -L
1887 Set the directory for the BIOS, VGA BIOS and keymaps.
1888 ETEXI
1889
1890 DEF("bios", HAS_ARG, QEMU_OPTION_bios, \
1891     "-bios file      set the filename for the BIOS\n", QEMU_ARCH_ALL)
1892 STEXI
1893 @item -bios @var{file}
1894 @findex -bios
1895 Set the filename for the BIOS.
1896 ETEXI
1897
1898 DEF("enable-kvm", 0, QEMU_OPTION_enable_kvm, \
1899     "-enable-kvm     enable KVM full virtualization support\n", QEMU_ARCH_ALL)
1900 STEXI
1901 @item -enable-kvm
1902 @findex -enable-kvm
1903 Enable KVM full virtualization support. This option is only available
1904 if KVM support is enabled when compiling.
1905 ETEXI
1906
1907 DEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid,
1908     "-xen-domid id   specify xen guest domain id\n", QEMU_ARCH_ALL)
1909 DEF("xen-create", 0, QEMU_OPTION_xen_create,
1910     "-xen-create     create domain using xen hypercalls, bypassing xend\n"
1911     "                warning: should not be used when xend is in use\n",
1912     QEMU_ARCH_ALL)
1913 DEF("xen-attach", 0, QEMU_OPTION_xen_attach,
1914     "-xen-attach     attach to existing xen domain\n"
1915     "                xend will use this when starting qemu\n",
1916     QEMU_ARCH_ALL)
1917 STEXI
1918 @item -xen-domid @var{id}
1919 @findex -xen-domid
1920 Specify xen guest domain @var{id} (XEN only).
1921 @item -xen-create
1922 @findex -xen-create
1923 Create domain using xen hypercalls, bypassing xend.
1924 Warning: should not be used when xend is in use (XEN only).
1925 @item -xen-attach
1926 @findex -xen-attach
1927 Attach to existing xen domain.
1928 xend will use this when starting qemu (XEN only).
1929 ETEXI
1930
1931 DEF("no-reboot", 0, QEMU_OPTION_no_reboot, \
1932     "-no-reboot      exit instead of rebooting\n", QEMU_ARCH_ALL)
1933 STEXI
1934 @item -no-reboot
1935 @findex -no-reboot
1936 Exit instead of rebooting.
1937 ETEXI
1938
1939 DEF("no-shutdown", 0, QEMU_OPTION_no_shutdown, \
1940     "-no-shutdown    stop before shutdown\n", QEMU_ARCH_ALL)
1941 STEXI
1942 @item -no-shutdown
1943 @findex -no-shutdown
1944 Don't exit QEMU on guest shutdown, but instead only stop the emulation.
1945 This allows for instance switching to monitor to commit changes to the
1946 disk image.
1947 ETEXI
1948
1949 DEF("loadvm", HAS_ARG, QEMU_OPTION_loadvm, \
1950     "-loadvm [tag|id]\n" \
1951     "                start right away with a saved state (loadvm in monitor)\n",
1952     QEMU_ARCH_ALL)
1953 STEXI
1954 @item -loadvm @var{file}
1955 @findex -loadvm
1956 Start right away with a saved state (@code{loadvm} in monitor)
1957 ETEXI
1958
1959 #ifndef _WIN32
1960 DEF("daemonize", 0, QEMU_OPTION_daemonize, \
1961     "-daemonize      daemonize QEMU after initializing\n", QEMU_ARCH_ALL)
1962 #endif
1963 STEXI
1964 @item -daemonize
1965 @findex -daemonize
1966 Daemonize the QEMU process after initialization.  QEMU will not detach from
1967 standard IO until it is ready to receive connections on any of its devices.
1968 This option is a useful way for external programs to launch QEMU without having
1969 to cope with initialization race conditions.
1970 ETEXI
1971
1972 DEF("option-rom", HAS_ARG, QEMU_OPTION_option_rom, \
1973     "-option-rom rom load a file, rom, into the option ROM space\n",
1974     QEMU_ARCH_ALL)
1975 STEXI
1976 @item -option-rom @var{file}
1977 @findex -option-rom
1978 Load the contents of @var{file} as an option ROM.
1979 This option is useful to load things like EtherBoot.
1980 ETEXI
1981
1982 DEF("clock", HAS_ARG, QEMU_OPTION_clock, \
1983     "-clock          force the use of the given methods for timer alarm.\n" \
1984     "                To see what timers are available use -clock ?\n",
1985     QEMU_ARCH_ALL)
1986 STEXI
1987 @item -clock @var{method}
1988 @findex -clock
1989 Force the use of the given methods for timer alarm. To see what timers
1990 are available use -clock ?.
1991 ETEXI
1992
1993 HXCOMM Options deprecated by -rtc
1994 DEF("localtime", 0, QEMU_OPTION_localtime, "", QEMU_ARCH_ALL)
1995 DEF("startdate", HAS_ARG, QEMU_OPTION_startdate, "", QEMU_ARCH_ALL)
1996
1997 DEF("rtc", HAS_ARG, QEMU_OPTION_rtc, \
1998     "-rtc [base=utc|localtime|date][,clock=host|vm][,driftfix=none|slew]\n" \
1999     "                set the RTC base and clock, enable drift fix for clock ticks (x86 only)\n",
2000     QEMU_ARCH_ALL)
2001
2002 STEXI
2003
2004 @item -rtc [base=utc|localtime|@var{date}][,clock=host|vm][,driftfix=none|slew]
2005 @findex -rtc
2006 Specify @option{base} as @code{utc} or @code{localtime} to let the RTC start at the current
2007 UTC or local time, respectively. @code{localtime} is required for correct date in
2008 MS-DOS or Windows. To start at a specific point in time, provide @var{date} in the
2009 format @code{2006-06-17T16:01:21} or @code{2006-06-17}. The default base is UTC.
2010
2011 By default the RTC is driven by the host system time. This allows to use the
2012 RTC as accurate reference clock inside the guest, specifically if the host
2013 time is smoothly following an accurate external reference clock, e.g. via NTP.
2014 If you want to isolate the guest time from the host, even prevent it from
2015 progressing during suspension, you can set @option{clock} to @code{vm} instead.
2016
2017 Enable @option{driftfix} (i386 targets only) if you experience time drift problems,
2018 specifically with Windows' ACPI HAL. This option will try to figure out how
2019 many timer interrupts were not processed by the Windows guest and will
2020 re-inject them.
2021 ETEXI
2022
2023 DEF("icount", HAS_ARG, QEMU_OPTION_icount, \
2024     "-icount [N|auto]\n" \
2025     "                enable virtual instruction counter with 2^N clock ticks per\n" \
2026     "                instruction\n", QEMU_ARCH_ALL)
2027 STEXI
2028 @item -icount [@var{N}|auto]
2029 @findex -icount
2030 Enable virtual instruction counter.  The virtual cpu will execute one
2031 instruction every 2^@var{N} ns of virtual time.  If @code{auto} is specified
2032 then the virtual cpu speed will be automatically adjusted to keep virtual
2033 time within a few seconds of real time.
2034
2035 Note that while this option can give deterministic behavior, it does not
2036 provide cycle accurate emulation.  Modern CPUs contain superscalar out of
2037 order cores with complex cache hierarchies.  The number of instructions
2038 executed often has little or no correlation with actual performance.
2039 ETEXI
2040
2041 DEF("watchdog", HAS_ARG, QEMU_OPTION_watchdog, \
2042     "-watchdog i6300esb|ib700\n" \
2043     "                enable virtual hardware watchdog [default=none]\n",
2044     QEMU_ARCH_ALL)
2045 STEXI
2046 @item -watchdog @var{model}
2047 @findex -watchdog
2048 Create a virtual hardware watchdog device.  Once enabled (by a guest
2049 action), the watchdog must be periodically polled by an agent inside
2050 the guest or else the guest will be restarted.
2051
2052 The @var{model} is the model of hardware watchdog to emulate.  Choices
2053 for model are: @code{ib700} (iBASE 700) which is a very simple ISA
2054 watchdog with a single timer, or @code{i6300esb} (Intel 6300ESB I/O
2055 controller hub) which is a much more featureful PCI-based dual-timer
2056 watchdog.  Choose a model for which your guest has drivers.
2057
2058 Use @code{-watchdog ?} to list available hardware models.  Only one
2059 watchdog can be enabled for a guest.
2060 ETEXI
2061
2062 DEF("watchdog-action", HAS_ARG, QEMU_OPTION_watchdog_action, \
2063     "-watchdog-action reset|shutdown|poweroff|pause|debug|none\n" \
2064     "                action when watchdog fires [default=reset]\n",
2065     QEMU_ARCH_ALL)
2066 STEXI
2067 @item -watchdog-action @var{action}
2068
2069 The @var{action} controls what QEMU will do when the watchdog timer
2070 expires.
2071 The default is
2072 @code{reset} (forcefully reset the guest).
2073 Other possible actions are:
2074 @code{shutdown} (attempt to gracefully shutdown the guest),
2075 @code{poweroff} (forcefully poweroff the guest),
2076 @code{pause} (pause the guest),
2077 @code{debug} (print a debug message and continue), or
2078 @code{none} (do nothing).
2079
2080 Note that the @code{shutdown} action requires that the guest responds
2081 to ACPI signals, which it may not be able to do in the sort of
2082 situations where the watchdog would have expired, and thus
2083 @code{-watchdog-action shutdown} is not recommended for production use.
2084
2085 Examples:
2086
2087 @table @code
2088 @item -watchdog i6300esb -watchdog-action pause
2089 @item -watchdog ib700
2090 @end table
2091 ETEXI
2092
2093 DEF("echr", HAS_ARG, QEMU_OPTION_echr, \
2094     "-echr chr       set terminal escape character instead of ctrl-a\n",
2095     QEMU_ARCH_ALL)
2096 STEXI
2097
2098 @item -echr @var{numeric_ascii_value}
2099 @findex -echr
2100 Change the escape character used for switching to the monitor when using
2101 monitor and serial sharing.  The default is @code{0x01} when using the
2102 @code{-nographic} option.  @code{0x01} is equal to pressing
2103 @code{Control-a}.  You can select a different character from the ascii
2104 control keys where 1 through 26 map to Control-a through Control-z.  For
2105 instance you could use the either of the following to change the escape
2106 character to Control-t.
2107 @table @code
2108 @item -echr 0x14
2109 @item -echr 20
2110 @end table
2111 ETEXI
2112
2113 DEF("virtioconsole", HAS_ARG, QEMU_OPTION_virtiocon, \
2114     "-virtioconsole c\n" \
2115     "                set virtio console\n", QEMU_ARCH_ALL)
2116 STEXI
2117 @item -virtioconsole @var{c}
2118 @findex -virtioconsole
2119 Set virtio console.
2120
2121 This option is maintained for backward compatibility.
2122
2123 Please use @code{-device virtconsole} for the new way of invocation.
2124 ETEXI
2125
2126 DEF("show-cursor", 0, QEMU_OPTION_show_cursor, \
2127     "-show-cursor    show cursor\n", QEMU_ARCH_ALL)
2128 STEXI
2129 @item -show-cursor
2130 @findex -show-cursor
2131 Show cursor.
2132 ETEXI
2133
2134 DEF("tb-size", HAS_ARG, QEMU_OPTION_tb_size, \
2135     "-tb-size n      set TB size\n", QEMU_ARCH_ALL)
2136 STEXI
2137 @item -tb-size @var{n}
2138 @findex -tb-size
2139 Set TB size.
2140 ETEXI
2141
2142 DEF("incoming", HAS_ARG, QEMU_OPTION_incoming, \
2143     "-incoming p     prepare for incoming migration, listen on port p\n",
2144     QEMU_ARCH_ALL)
2145 STEXI
2146 @item -incoming @var{port}
2147 @findex -incoming
2148 Prepare for incoming migration, listen on @var{port}.
2149 ETEXI
2150
2151 DEF("nodefaults", 0, QEMU_OPTION_nodefaults, \
2152     "-nodefaults     don't create default devices\n", QEMU_ARCH_ALL)
2153 STEXI
2154 @item -nodefaults
2155 @findex -nodefaults
2156 Don't create default devices.
2157 ETEXI
2158
2159 #ifndef _WIN32
2160 DEF("chroot", HAS_ARG, QEMU_OPTION_chroot, \
2161     "-chroot dir     chroot to dir just before starting the VM\n",
2162     QEMU_ARCH_ALL)
2163 #endif
2164 STEXI
2165 @item -chroot @var{dir}
2166 @findex -chroot
2167 Immediately before starting guest execution, chroot to the specified
2168 directory.  Especially useful in combination with -runas.
2169 ETEXI
2170
2171 #ifndef _WIN32
2172 DEF("runas", HAS_ARG, QEMU_OPTION_runas, \
2173     "-runas user     change to user id user just before starting the VM\n",
2174     QEMU_ARCH_ALL)
2175 #endif
2176 STEXI
2177 @item -runas @var{user}
2178 @findex -runas
2179 Immediately before starting guest execution, drop root privileges, switching
2180 to the specified user.
2181 ETEXI
2182
2183 DEF("prom-env", HAS_ARG, QEMU_OPTION_prom_env,
2184     "-prom-env variable=value\n"
2185     "                set OpenBIOS nvram variables\n",
2186     QEMU_ARCH_PPC | QEMU_ARCH_SPARC)
2187 STEXI
2188 @item -prom-env @var{variable}=@var{value}
2189 @findex -prom-env
2190 Set OpenBIOS nvram @var{variable} to given @var{value} (PPC, SPARC only).
2191 ETEXI
2192 DEF("semihosting", 0, QEMU_OPTION_semihosting,
2193     "-semihosting    semihosting mode\n", QEMU_ARCH_ARM | QEMU_ARCH_M68K)
2194 STEXI
2195 @item -semihosting
2196 @findex -semihosting
2197 Semihosting mode (ARM, M68K only).
2198 ETEXI
2199 DEF("old-param", 0, QEMU_OPTION_old_param,
2200     "-old-param      old param mode\n", QEMU_ARCH_ARM)
2201 STEXI
2202 @item -old-param
2203 @findex -old-param (ARM)
2204 Old param mode (ARM only).
2205 ETEXI
2206
2207 DEF("readconfig", HAS_ARG, QEMU_OPTION_readconfig,
2208     "-readconfig <file>\n", QEMU_ARCH_ALL)
2209 STEXI
2210 @item -readconfig @var{file}
2211 @findex -readconfig
2212 Read device configuration from @var{file}.
2213 ETEXI
2214 DEF("writeconfig", HAS_ARG, QEMU_OPTION_writeconfig,
2215     "-writeconfig <file>\n"
2216     "                read/write config file\n", QEMU_ARCH_ALL)
2217 STEXI
2218 @item -writeconfig @var{file}
2219 @findex -writeconfig
2220 Write device configuration to @var{file}.
2221 ETEXI
2222 DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig,
2223     "-nodefconfig\n"
2224     "                do not load default config files at startup\n",
2225     QEMU_ARCH_ALL)
2226 STEXI
2227 @item -nodefconfig
2228 @findex -nodefconfig
2229 Normally QEMU loads a configuration file from @var{sysconfdir}/qemu.conf and
2230 @var{sysconfdir}/target-@var{ARCH}.conf on startup.  The @code{-nodefconfig}
2231 option will prevent QEMU from loading these configuration files at startup.
2232 ETEXI
2233
2234 HXCOMM This is the last statement. Insert new options before this line!
2235 STEXI
2236 @end table
2237 ETEXI