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|unsafe|none][,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 #ifdef CONFIG_LINUX
 486 DEFHEADING(File system options:)
 487
 488 DEF("fsdev", HAS_ARG, QEMU_OPTION_fsdev,
 489     "-fsdev local,id=id,path=path,security_model=[mapped|passthrough]\n",
 490     QEMU_ARCH_ALL)
 491
 492 STEXI
 493
 494 The general form of a File system device option is:
 495 @table @option
 496
 497 @item -fsdev @var{fstype} ,id=@var{id} [,@var{options}]
 498 @findex -fsdev
 499 Fstype is one of:
 500 @option{local},
 501 The specific Fstype will determine the applicable options.
 502
 503 Options to each backend are described below.
 504
 505 @item -fsdev local ,id=@var{id} ,path=@var{path} ,security_model=@var{security_model}
 506
 507 Create a file-system-"device" for local-filesystem.
 508
 509 @option{local} is only available on Linux.
 510
 511 @option{path} specifies the path to be exported. @option{path} is required.
 512
 513 @option{security_model} specifies the security model to be followed.
 514 @option{security_model} is required.
 515
 516 @end table
 517 ETEXI
 518 #endif
 519
 520 #ifdef CONFIG_LINUX
 521 DEFHEADING(Virtual File system pass-through options:)
 522
 523 DEF("virtfs", HAS_ARG, QEMU_OPTION_virtfs,
 524     "-virtfs local,path=path,mount_tag=tag,security_model=[mapped|passthrough]\n",
 525     QEMU_ARCH_ALL)
 526
 527 STEXI
 528
 529 The general form of a Virtual File system pass-through option is:
 530 @table @option
 531
 532 @item -virtfs @var{fstype} [,@var{options}]
 533 @findex -virtfs
 534 Fstype is one of:
 535 @option{local},
 536 The specific Fstype will determine the applicable options.
 537
 538 Options to each backend are described below.
 539
 540 @item -virtfs local ,path=@var{path} ,mount_tag=@var{mount_tag} ,security_model=@var{security_model}
 541
 542 Create a Virtual file-system-pass through for local-filesystem.
 543
 544 @option{local} is only available on Linux.
 545
 546 @option{path} specifies the path to be exported. @option{path} is required.
 547
 548 @option{security_model} specifies the security model to be followed.
 549 @option{security_model} is required.
 550
 551
 552 @option{mount_tag} specifies the tag with which the exported file is mounted.
 553 @option{mount_tag} is required.
 554
 555 @end table
 556 ETEXI
 557 #endif
 558
 559 DEFHEADING()
 560
 561 DEF("name", HAS_ARG, QEMU_OPTION_name,
 562     "-name string1[,process=string2]\n"
 563     "                set the name of the guest\n"
 564     "                string1 sets the window title and string2 the process name (on Linux)\n",
 565     QEMU_ARCH_ALL)
 566 STEXI
 567 @item -name @var{name}
 568 @findex -name
 569 Sets the @var{name} of the guest.
 570 This name will be displayed in the SDL window caption.
 571 The @var{name} will also be used for the VNC server.
 572 Also optionally set the top visible process name in Linux.
 573 ETEXI
 574
 575 DEF("uuid", HAS_ARG, QEMU_OPTION_uuid,
 576     "-uuid %08x-%04x-%04x-%04x-%012x\n"
 577     "                specify machine UUID\n", QEMU_ARCH_ALL)
 578 STEXI
 579 @item -uuid @var{uuid}
 580 @findex -uuid
 581 Set system UUID.
 582 ETEXI
 583
 584 STEXI
 585 @end table
 586 ETEXI
 587
 588 DEFHEADING()
 589
 590 DEFHEADING(Display options:)
 591
 592 STEXI
 593 @table @option
 594 ETEXI
 595
 596 DEF("nographic", 0, QEMU_OPTION_nographic,
 597     "-nographic      disable graphical output and redirect serial I/Os to console\n",
 598     QEMU_ARCH_ALL)
 599 STEXI
 600 @item -nographic
 601 @findex -nographic
 602 Normally, QEMU uses SDL to display the VGA output. With this option,
 603 you can totally disable graphical output so that QEMU is a simple
 604 command line application. The emulated serial port is redirected on
 605 the console. Therefore, you can still use QEMU to debug a Linux kernel
 606 with a serial console.
 607 ETEXI
 608
 609 #ifdef CONFIG_CURSES
 610 DEF("curses", 0, QEMU_OPTION_curses,
 611     "-curses         use a curses/ncurses interface instead of SDL\n",
 612     QEMU_ARCH_ALL)
 613 #endif
 614 STEXI
 615 @item -curses
 616 @findex curses
 617 Normally, QEMU uses SDL to display the VGA output.  With this option,
 618 QEMU can display the VGA output when in text mode using a
 619 curses/ncurses interface.  Nothing is displayed in graphical mode.
 620 ETEXI
 621
 622 #ifdef CONFIG_SDL
 623 DEF("no-frame", 0, QEMU_OPTION_no_frame,
 624     "-no-frame       open SDL window without a frame and window decorations\n",
 625     QEMU_ARCH_ALL)
 626 #endif
 627 STEXI
 628 @item -no-frame
 629 @findex -no-frame
 630 Do not use decorations for SDL windows and start them using the whole
 631 available screen space. This makes the using QEMU in a dedicated desktop
 632 workspace more convenient.
 633 ETEXI
 634
 635 #ifdef CONFIG_SDL
 636 DEF("alt-grab", 0, QEMU_OPTION_alt_grab,
 637     "-alt-grab       use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)\n",
 638     QEMU_ARCH_ALL)
 639 #endif
 640 STEXI
 641 @item -alt-grab
 642 @findex -alt-grab
 643 Use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt).
 644 ETEXI
 645
 646 #ifdef CONFIG_SDL
 647 DEF("ctrl-grab", 0, QEMU_OPTION_ctrl_grab,
 648     "-ctrl-grab      use Right-Ctrl to grab mouse (instead of Ctrl-Alt)\n",
 649     QEMU_ARCH_ALL)
 650 #endif
 651 STEXI
 652 @item -ctrl-grab
 653 @findex -ctrl-grab
 654 Use Right-Ctrl to grab mouse (instead of Ctrl-Alt).
 655 ETEXI
 656
 657 #ifdef CONFIG_SDL
 658 DEF("no-quit", 0, QEMU_OPTION_no_quit,
 659     "-no-quit        disable SDL window close capability\n", QEMU_ARCH_ALL)
 660 #endif
 661 STEXI
 662 @item -no-quit
 663 @findex -no-quit
 664 Disable SDL window close capability.
 665 ETEXI
 666
 667 #ifdef CONFIG_SDL
 668 DEF("sdl", 0, QEMU_OPTION_sdl,
 669     "-sdl            enable SDL\n", QEMU_ARCH_ALL)
 670 #endif
 671 STEXI
 672 @item -sdl
 673 @findex -sdl
 674 Enable SDL.
 675 ETEXI
 676
 677 DEF("portrait", 0, QEMU_OPTION_portrait,
 678     "-portrait       rotate graphical output 90 deg left (only PXA LCD)\n",
 679     QEMU_ARCH_ALL)
 680 STEXI
 681 @item -portrait
 682 @findex -portrait
 683 Rotate graphical output 90 deg left (only PXA LCD).
 684 ETEXI
 685
 686 DEF("vga", HAS_ARG, QEMU_OPTION_vga,
 687     "-vga [std|cirrus|vmware|xenfb|none]\n"
 688     "                select video card type\n", QEMU_ARCH_ALL)
 689 STEXI
 690 @item -vga @var{type}
 691 @findex -vga
 692 Select type of VGA card to emulate. Valid values for @var{type} are
 693 @table @option
 694 @item cirrus
 695 Cirrus Logic GD5446 Video card. All Windows versions starting from
 696 Windows 95 should recognize and use this graphic card. For optimal
 697 performances, use 16 bit color depth in the guest and the host OS.
 698 (This one is the default)
 699 @item std
 700 Standard VGA card with Bochs VBE extensions.  If your guest OS
 701 supports the VESA 2.0 VBE extensions (e.g. Windows XP) and if you want
 702 to use high resolution modes (>= 1280x1024x16) then you should use
 703 this option.
 704 @item vmware
 705 VMWare SVGA-II compatible adapter. Use it if you have sufficiently
 706 recent XFree86/XOrg server or Windows guest with a driver for this
 707 card.
 708 @item none
 709 Disable VGA card.
 710 @end table
 711 ETEXI
 712
 713 DEF("full-screen", 0, QEMU_OPTION_full_screen,
 714     "-full-screen    start in full screen\n", QEMU_ARCH_ALL)
 715 STEXI
 716 @item -full-screen
 717 @findex -full-screen
 718 Start in full screen.
 719 ETEXI
 720
 721 DEF("g", 1, QEMU_OPTION_g ,
 722     "-g WxH[xDEPTH]  Set the initial graphical resolution and depth\n",
 723     QEMU_ARCH_PPC | QEMU_ARCH_SPARC)
 724 STEXI
 725 @item -g @var{width}x@var{height}[x@var{depth}]
 726 @findex -g
 727 Set the initial graphical resolution and depth (PPC, SPARC only).
 728 ETEXI
 729
 730 DEF("vnc", HAS_ARG, QEMU_OPTION_vnc ,
 731     "-vnc display    start a VNC server on display\n", QEMU_ARCH_ALL)
 732 STEXI
 733 @item -vnc @var{display}[,@var{option}[,@var{option}[,...]]]
 734 @findex -vnc
 735 Normally, QEMU uses SDL to display the VGA output.  With this option,
 736 you can have QEMU listen on VNC display @var{display} and redirect the VGA
 737 display over the VNC session.  It is very useful to enable the usb
 738 tablet device when using this option (option @option{-usbdevice
 739 tablet}). When using the VNC display, you must use the @option{-k}
 740 parameter to set the keyboard layout if you are not using en-us. Valid
 741 syntax for the @var{display} is
 742
 743 @table @option
 744
 745 @item @var{host}:@var{d}
 746
 747 TCP connections will only be allowed from @var{host} on display @var{d}.
 748 By convention the TCP port is 5900+@var{d}. Optionally, @var{host} can
 749 be omitted in which case the server will accept connections from any host.
 750
 751 @item unix:@var{path}
 752
 753 Connections will be allowed over UNIX domain sockets where @var{path} is the
 754 location of a unix socket to listen for connections on.
 755
 756 @item none
 757
 758 VNC is initialized but not started. The monitor @code{change} command
 759 can be used to later start the VNC server.
 760
 761 @end table
 762
 763 Following the @var{display} value there may be one or more @var{option} flags
 764 separated by commas. Valid options are
 765
 766 @table @option
 767
 768 @item reverse
 769
 770 Connect to a listening VNC client via a ``reverse'' connection. The
 771 client is specified by the @var{display}. For reverse network
 772 connections (@var{host}:@var{d},@code{reverse}), the @var{d} argument
 773 is a TCP port number, not a display number.
 774
 775 @item password
 776
 777 Require that password based authentication is used for client connections.
 778 The password must be set separately using the @code{change} command in the
 779 @ref{pcsys_monitor}
 780
 781 @item tls
 782
 783 Require that client use TLS when communicating with the VNC server. This
 784 uses anonymous TLS credentials so is susceptible to a man-in-the-middle
 785 attack. It is recommended that this option be combined with either the
 786 @option{x509} or @option{x509verify} options.
 787
 788 @item x509=@var{/path/to/certificate/dir}
 789
 790 Valid if @option{tls} is specified. Require that x509 credentials are used
 791 for negotiating the TLS session. The server will send its x509 certificate
 792 to the client. It is recommended that a password be set on the VNC server
 793 to provide authentication of the client when this is used. The path following
 794 this option specifies where the x509 certificates are to be loaded from.
 795 See the @ref{vnc_security} section for details on generating certificates.
 796
 797 @item x509verify=@var{/path/to/certificate/dir}
 798
 799 Valid if @option{tls} is specified. Require that x509 credentials are used
 800 for negotiating the TLS session. The server will send its x509 certificate
 801 to the client, and request that the client send its own x509 certificate.
 802 The server will validate the client's certificate against the CA certificate,
 803 and reject clients when validation fails. If the certificate authority is
 804 trusted, this is a sufficient authentication mechanism. You may still wish
 805 to set a password on the VNC server as a second authentication layer. The
 806 path following this option specifies where the x509 certificates are to
 807 be loaded from. See the @ref{vnc_security} section for details on generating
 808 certificates.
 809
 810 @item sasl
 811
 812 Require that the client use SASL to authenticate with the VNC server.
 813 The exact choice of authentication method used is controlled from the
 814 system / user's SASL configuration file for the 'qemu' service. This
 815 is typically found in /etc/sasl2/qemu.conf. If running QEMU as an
 816 unprivileged user, an environment variable SASL_CONF_PATH can be used
 817 to make it search alternate locations for the service config.
 818 While some SASL auth methods can also provide data encryption (eg GSSAPI),
 819 it is recommended that SASL always be combined with the 'tls' and
 820 'x509' settings to enable use of SSL and server certificates. This
 821 ensures a data encryption preventing compromise of authentication
 822 credentials. See the @ref{vnc_security} section for details on using
 823 SASL authentication.
 824
 825 @item acl
 826
 827 Turn on access control lists for checking of the x509 client certificate
 828 and SASL party. For x509 certs, the ACL check is made against the
 829 certificate's distinguished name. This is something that looks like
 830 @code{C=GB,O=ACME,L=Boston,CN=bob}. For SASL party, the ACL check is
 831 made against the username, which depending on the SASL plugin, may
 832 include a realm component, eg @code{bob} or @code{bob@@EXAMPLE.COM}.
 833 When the @option{acl} flag is set, the initial access list will be
 834 empty, with a @code{deny} policy. Thus no one will be allowed to
 835 use the VNC server until the ACLs have been loaded. This can be
 836 achieved using the @code{acl} monitor command.
 837
 838 @item lossy
 839
 840 Enable lossy compression methods (gradient, JPEG, ...). If this
 841 option is set, VNC client may receive lossy framebuffer updates
 842 depending on its encoding settings. Enabling this option can save
 843 a lot of bandwidth at the expense of quality.
 844
 845 @end table
 846 ETEXI
 847
 848 STEXI
 849 @end table
 850 ETEXI
 851
 852 DEFHEADING()
 853
 854 DEFHEADING(i386 target only:)
 855 STEXI
 856 @table @option
 857 ETEXI
 858
 859 DEF("win2k-hack", 0, QEMU_OPTION_win2k_hack,
 860     "-win2k-hack     use it when installing Windows 2000 to avoid a disk full bug\n",
 861     QEMU_ARCH_I386)
 862 STEXI
 863 @item -win2k-hack
 864 @findex -win2k-hack
 865 Use it when installing Windows 2000 to avoid a disk full bug. After
 866 Windows 2000 is installed, you no longer need this option (this option
 867 slows down the IDE transfers).
 868 ETEXI
 869
 870 HXCOMM Deprecated by -rtc
 871 DEF("rtc-td-hack", 0, QEMU_OPTION_rtc_td_hack, "", QEMU_ARCH_I386)
 872
 873 DEF("no-fd-bootchk", 0, QEMU_OPTION_no_fd_bootchk,
 874     "-no-fd-bootchk  disable boot signature checking for floppy disks\n",
 875     QEMU_ARCH_I386)
 876 STEXI
 877 @item -no-fd-bootchk
 878 @findex -no-fd-bootchk
 879 Disable boot signature checking for floppy disks in Bochs BIOS. It may
 880 be needed to boot from old floppy disks.
 881 TODO: check reference to Bochs BIOS.
 882 ETEXI
 883
 884 DEF("no-acpi", 0, QEMU_OPTION_no_acpi,
 885            "-no-acpi        disable ACPI\n", QEMU_ARCH_I386)
 886 STEXI
 887 @item -no-acpi
 888 @findex -no-acpi
 889 Disable ACPI (Advanced Configuration and Power Interface) support. Use
 890 it if your guest OS complains about ACPI problems (PC target machine
 891 only).
 892 ETEXI
 893
 894 DEF("no-hpet", 0, QEMU_OPTION_no_hpet,
 895     "-no-hpet        disable HPET\n", QEMU_ARCH_I386)
 896 STEXI
 897 @item -no-hpet
 898 @findex -no-hpet
 899 Disable HPET support.
 900 ETEXI
 901
 902 DEF("balloon", HAS_ARG, QEMU_OPTION_balloon,
 903     "-balloon none   disable balloon device\n"
 904     "-balloon virtio[,addr=str]\n"
 905     "                enable virtio balloon device (default)\n", QEMU_ARCH_ALL)
 906 STEXI
 907 @item -balloon none
 908 @findex -balloon
 909 Disable balloon device.
 910 @item -balloon virtio[,addr=@var{addr}]
 911 Enable virtio balloon device (default), optionally with PCI address
 912 @var{addr}.
 913 ETEXI
 914
 915 DEF("acpitable", HAS_ARG, QEMU_OPTION_acpitable,
 916     "-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"
 917     "                ACPI table description\n", QEMU_ARCH_I386)
 918 STEXI
 919 @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}]...]
 920 @findex -acpitable
 921 Add ACPI table with specified header fields and context from specified files.
 922 ETEXI
 923
 924 DEF("smbios", HAS_ARG, QEMU_OPTION_smbios,
 925     "-smbios file=binary\n"
 926     "                load SMBIOS entry from binary file\n"
 927     "-smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d]\n"
 928     "                specify SMBIOS type 0 fields\n"
 929     "-smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str]\n"
 930     "              [,uuid=uuid][,sku=str][,family=str]\n"
 931     "                specify SMBIOS type 1 fields\n", QEMU_ARCH_I386)
 932 STEXI
 933 @item -smbios file=@var{binary}
 934 @findex -smbios
 935 Load SMBIOS entry from binary file.
 936
 937 @item -smbios type=0[,vendor=@var{str}][,version=@var{str}][,date=@var{str}][,release=@var{%d.%d}]
 938 @findex -smbios
 939 Specify SMBIOS type 0 fields
 940
 941 @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}]
 942 Specify SMBIOS type 1 fields
 943 ETEXI
 944
 945 DEFHEADING()
 946 STEXI
 947 @end table
 948 ETEXI
 949
 950 DEFHEADING(Network options:)
 951 STEXI
 952 @table @option
 953 ETEXI
 954
 955 HXCOMM Legacy slirp options (now moved to -net user):
 956 #ifdef CONFIG_SLIRP
 957 DEF("tftp", HAS_ARG, QEMU_OPTION_tftp, "", QEMU_ARCH_ALL)
 958 DEF("bootp", HAS_ARG, QEMU_OPTION_bootp, "", QEMU_ARCH_ALL)
 959 DEF("redir", HAS_ARG, QEMU_OPTION_redir, "", QEMU_ARCH_ALL)
 960 #ifndef _WIN32
 961 DEF("smb", HAS_ARG, QEMU_OPTION_smb, "", QEMU_ARCH_ALL)
 962 #endif
 963 #endif
 964
 965 DEF("net", HAS_ARG, QEMU_OPTION_net,
 966     "-net nic[,vlan=n][,macaddr=mac][,model=type][,name=str][,addr=str][,vectors=v]\n"
 967     "                create a new Network Interface Card and connect it to VLAN 'n'\n"
 968 #ifdef CONFIG_SLIRP
 969     "-net user[,vlan=n][,name=str][,net=addr[/mask]][,host=addr][,restrict=y|n]\n"
 970     "         [,hostname=host][,dhcpstart=addr][,dns=addr][,tftp=dir][,bootfile=f]\n"
 971     "         [,hostfwd=rule][,guestfwd=rule]"
 972 #ifndef _WIN32
 973                                              "[,smb=dir[,smbserver=addr]]\n"
 974 #endif
 975     "                connect the user mode network stack to VLAN 'n', configure its\n"
 976     "                DHCP server and enabled optional services\n"
 977 #endif
 978 #ifdef _WIN32
 979     "-net tap[,vlan=n][,name=str],ifname=name\n"
 980     "                connect the host TAP network interface to VLAN 'n'\n"
 981 #else
 982     "-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"
 983     "                connect the host TAP network interface to VLAN 'n' and use the\n"
 984     "                network scripts 'file' (default=" DEFAULT_NETWORK_SCRIPT ")\n"
 985     "                and 'dfile' (default=" DEFAULT_NETWORK_DOWN_SCRIPT ")\n"
 986     "                use '[down]script=no' to disable script execution\n"
 987     "                use 'fd=h' to connect to an already opened TAP interface\n"
 988     "                use 'sndbuf=nbytes' to limit the size of the send buffer (the\n"
 989     "                default of 'sndbuf=1048576' can be disabled using 'sndbuf=0')\n"
 990     "                use vnet_hdr=off to avoid enabling the IFF_VNET_HDR tap flag\n"
 991     "                use vnet_hdr=on to make the lack of IFF_VNET_HDR support an error condition\n"
 992     "                use vhost=on to enable experimental in kernel accelerator\n"
 993     "                use 'vhostfd=h' to connect to an already opened vhost net device\n"
 994 #endif
 995     "-net socket[,vlan=n][,name=str][,fd=h][,listen=[host]:port][,connect=host:port]\n"
 996     "                connect the vlan 'n' to another VLAN using a socket connection\n"
 997     "-net socket[,vlan=n][,name=str][,fd=h][,mcast=maddr:port]\n"
 998     "                connect the vlan 'n' to multicast maddr and port\n"
 999 #ifdef CONFIG_VDE
1000     "-net vde[,vlan=n][,name=str][,sock=socketpath][,port=n][,group=groupname][,mode=octalmode]\n"
1001     "                connect the vlan 'n' to port 'n' of a vde switch running\n"
1002     "                on host and listening for incoming connections on 'socketpath'.\n"
1003     "                Use group 'groupname' and mode 'octalmode' to change default\n"
1004     "                ownership and permissions for communication port.\n"
1005 #endif
1006     "-net dump[,vlan=n][,file=f][,len=n]\n"
1007     "                dump traffic on vlan 'n' to file 'f' (max n bytes per packet)\n"
1008     "-net none       use it alone to have zero network devices. If no -net option\n"
1009     "                is provided, the default is '-net nic -net user'\n", QEMU_ARCH_ALL)
1010 DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
1011     "-netdev ["
1012 #ifdef CONFIG_SLIRP
1013     "user|"
1014 #endif
1015     "tap|"
1016 #ifdef CONFIG_VDE
1017     "vde|"
1018 #endif
1019     "socket],id=str[,option][,option][,...]\n", QEMU_ARCH_ALL)
1020 STEXI
1021 @item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}] [,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
1022 @findex -net
1023 Create a new Network Interface Card and connect it to VLAN @var{n} (@var{n}
1024 = 0 is the default). The NIC is an e1000 by default on the PC
1025 target. Optionally, the MAC address can be changed to @var{mac}, the
1026 device address set to @var{addr} (PCI cards only),
1027 and a @var{name} can be assigned for use in monitor commands.
1028 Optionally, for PCI cards, you can specify the number @var{v} of MSI-X vectors
1029 that the card should have; this option currently only affects virtio cards; set
1030 @var{v} = 0 to disable MSI-X. If no @option{-net} option is specified, a single
1031 NIC is created.  Qemu can emulate several different models of network card.
1032 Valid values for @var{type} are
1033 @code{virtio}, @code{i82551}, @code{i82557b}, @code{i82559er},
1034 @code{ne2k_pci}, @code{ne2k_isa}, @code{pcnet}, @code{rtl8139},
1035 @code{e1000}, @code{smc91c111}, @code{lance} and @code{mcf_fec}.
1036 Not all devices are supported on all targets.  Use -net nic,model=?
1037 for a list of available devices for your target.
1038
1039 @item -net user[,@var{option}][,@var{option}][,...]
1040 Use the user mode network stack which requires no administrator
1041 privilege to run. Valid options are:
1042
1043 @table @option
1044 @item vlan=@var{n}
1045 Connect user mode stack to VLAN @var{n} (@var{n} = 0 is the default).
1046
1047 @item name=@var{name}
1048 Assign symbolic name for use in monitor commands.
1049
1050 @item net=@var{addr}[/@var{mask}]
1051 Set IP network address the guest will see. Optionally specify the netmask,
1052 either in the form a.b.c.d or as number of valid top-most bits. Default is
1053 10.0.2.0/8.
1054
1055 @item host=@var{addr}
1056 Specify the guest-visible address of the host. Default is the 2nd IP in the
1057 guest network, i.e. x.x.x.2.
1058
1059 @item restrict=y|yes|n|no
1060 If this options is enabled, the guest will be isolated, i.e. it will not be
1061 able to contact the host and no guest IP packets will be routed over the host
1062 to the outside. This option does not affect explicitly set forwarding rule.
1063
1064 @item hostname=@var{name}
1065 Specifies the client hostname reported by the builtin DHCP server.
1066
1067 @item dhcpstart=@var{addr}
1068 Specify the first of the 16 IPs the built-in DHCP server can assign. Default
1069 is the 16th to 31st IP in the guest network, i.e. x.x.x.16 to x.x.x.31.
1070
1071 @item dns=@var{addr}
1072 Specify the guest-visible address of the virtual nameserver. The address must
1073 be different from the host address. Default is the 3rd IP in the guest network,
1074 i.e. x.x.x.3.
1075
1076 @item tftp=@var{dir}
1077 When using the user mode network stack, activate a built-in TFTP
1078 server. The files in @var{dir} will be exposed as the root of a TFTP server.
1079 The TFTP client on the guest must be configured in binary mode (use the command
1080 @code{bin} of the Unix TFTP client).
1081
1082 @item bootfile=@var{file}
1083 When using the user mode network stack, broadcast @var{file} as the BOOTP
1084 filename. In conjunction with @option{tftp}, this can be used to network boot
1085 a guest from a local directory.
1086
1087 Example (using pxelinux):
1088 @example
1089 qemu -hda linux.img -boot n -net user,tftp=/path/to/tftp/files,bootfile=/pxelinux.0
1090 @end example
1091
1092 @item smb=@var{dir}[,smbserver=@var{addr}]
1093 When using the user mode network stack, activate a built-in SMB
1094 server so that Windows OSes can access to the host files in @file{@var{dir}}
1095 transparently. The IP address of the SMB server can be set to @var{addr}. By
1096 default the 4th IP in the guest network is used, i.e. x.x.x.4.
1097
1098 In the guest Windows OS, the line:
1099 @example
1100 10.0.2.4 smbserver
1101 @end example
1102 must be added in the file @file{C:\WINDOWS\LMHOSTS} (for windows 9x/Me)
1103 or @file{C:\WINNT\SYSTEM32\DRIVERS\ETC\LMHOSTS} (Windows NT/2000).
1104
1105 Then @file{@var{dir}} can be accessed in @file{\\smbserver\qemu}.
1106
1107 Note that a SAMBA server must be installed on the host OS in
1108 @file{/usr/sbin/smbd}. QEMU was tested successfully with smbd versions from
1109 Red Hat 9, Fedora Core 3 and OpenSUSE 11.x.
1110
1111 @item hostfwd=[tcp|udp]:[@var{hostaddr}]:@var{hostport}-[@var{guestaddr}]:@var{guestport}
1112 Redirect incoming TCP or UDP connections to the host port @var{hostport} to
1113 the guest IP address @var{guestaddr} on guest port @var{guestport}. If
1114 @var{guestaddr} is not specified, its value is x.x.x.15 (default first address
1115 given by the built-in DHCP server). By specifying @var{hostaddr}, the rule can
1116 be bound to a specific host interface. If no connection type is set, TCP is
1117 used. This option can be given multiple times.
1118
1119 For example, to redirect host X11 connection from screen 1 to guest
1120 screen 0, use the following:
1121
1122 @example
1123 # on the host
1124 qemu -net user,hostfwd=tcp:127.0.0.1:6001-:6000 [...]
1125 # this host xterm should open in the guest X11 server
1126 xterm -display :1
1127 @end example
1128
1129 To redirect telnet connections from host port 5555 to telnet port on
1130 the guest, use the following:
1131
1132 @example
1133 # on the host
1134 qemu -net user,hostfwd=tcp::5555-:23 [...]
1135 telnet localhost 5555
1136 @end example
1137
1138 Then when you use on the host @code{telnet localhost 5555}, you
1139 connect to the guest telnet server.
1140
1141 @item guestfwd=[tcp]:@var{server}:@var{port}-@var{dev}
1142 Forward guest TCP connections to the IP address @var{server} on port @var{port}
1143 to the character device @var{dev}. This option can be given multiple times.
1144
1145 @end table
1146
1147 Note: Legacy stand-alone options -tftp, -bootp, -smb and -redir are still
1148 processed and applied to -net user. Mixing them with the new configuration
1149 syntax gives undefined results. Their use for new applications is discouraged
1150 as they will be removed from future versions.
1151
1152 @item -net tap[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,ifname=@var{name}] [,script=@var{file}][,downscript=@var{dfile}]
1153 Connect the host TAP network interface @var{name} to VLAN @var{n}, use
1154 the network script @var{file} to configure it and the network script
1155 @var{dfile} to deconfigure it. If @var{name} is not provided, the OS
1156 automatically provides one. @option{fd}=@var{h} can be used to specify
1157 the handle of an already opened host TAP interface. The default network
1158 configure script is @file{/etc/qemu-ifup} and the default network
1159 deconfigure script is @file{/etc/qemu-ifdown}. Use @option{script=no}
1160 or @option{downscript=no} to disable script execution. Example:
1161
1162 @example
1163 qemu linux.img -net nic -net tap
1164 @end example
1165
1166 More complicated example (two NICs, each one connected to a TAP device)
1167 @example
1168 qemu linux.img -net nic,vlan=0 -net tap,vlan=0,ifname=tap0 \
1169                -net nic,vlan=1 -net tap,vlan=1,ifname=tap1
1170 @end example
1171
1172 @item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,listen=[@var{host}]:@var{port}][,connect=@var{host}:@var{port}]
1173
1174 Connect the VLAN @var{n} to a remote VLAN in another QEMU virtual
1175 machine using a TCP socket connection. If @option{listen} is
1176 specified, QEMU waits for incoming connections on @var{port}
1177 (@var{host} is optional). @option{connect} is used to connect to
1178 another QEMU instance using the @option{listen} option. @option{fd}=@var{h}
1179 specifies an already opened TCP socket.
1180
1181 Example:
1182 @example
1183 # launch a first QEMU instance
1184 qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
1185                -net socket,listen=:1234
1186 # connect the VLAN 0 of this instance to the VLAN 0
1187 # of the first instance
1188 qemu linux.img -net nic,macaddr=52:54:00:12:34:57 \
1189                -net socket,connect=127.0.0.1:1234
1190 @end example
1191
1192 @item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,mcast=@var{maddr}:@var{port}]
1193
1194 Create a VLAN @var{n} shared with another QEMU virtual
1195 machines using a UDP multicast socket, effectively making a bus for
1196 every QEMU with same multicast address @var{maddr} and @var{port}.
1197 NOTES:
1198 @enumerate
1199 @item
1200 Several QEMU can be running on different hosts and share same bus (assuming
1201 correct multicast setup for these hosts).
1202 @item
1203 mcast support is compatible with User Mode Linux (argument @option{eth@var{N}=mcast}), see
1204 @url{http://user-mode-linux.sf.net}.
1205 @item
1206 Use @option{fd=h} to specify an already opened UDP multicast socket.
1207 @end enumerate
1208
1209 Example:
1210 @example
1211 # launch one QEMU instance
1212 qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
1213                -net socket,mcast=230.0.0.1:1234
1214 # launch another QEMU instance on same "bus"
1215 qemu linux.img -net nic,macaddr=52:54:00:12:34:57 \
1216                -net socket,mcast=230.0.0.1:1234
1217 # launch yet another QEMU instance on same "bus"
1218 qemu linux.img -net nic,macaddr=52:54:00:12:34:58 \
1219                -net socket,mcast=230.0.0.1:1234
1220 @end example
1221
1222 Example (User Mode Linux compat.):
1223 @example
1224 # launch QEMU instance (note mcast address selected
1225 # is UML's default)
1226 qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
1227                -net socket,mcast=239.192.168.1:1102
1228 # launch UML
1229 /path/to/linux ubd0=/path/to/root_fs eth0=mcast
1230 @end example
1231
1232 @item -net vde[,vlan=@var{n}][,name=@var{name}][,sock=@var{socketpath}] [,port=@var{n}][,group=@var{groupname}][,mode=@var{octalmode}]
1233 Connect VLAN @var{n} to PORT @var{n} of a vde switch running on host and
1234 listening for incoming connections on @var{socketpath}. Use GROUP @var{groupname}
1235 and MODE @var{octalmode} to change default ownership and permissions for
1236 communication port. This option is available only if QEMU has been compiled
1237 with vde support enabled.
1238
1239 Example:
1240 @example
1241 # launch vde switch
1242 vde_switch -F -sock /tmp/myswitch
1243 # launch QEMU instance
1244 qemu linux.img -net nic -net vde,sock=/tmp/myswitch
1245 @end example
1246
1247 @item -net dump[,vlan=@var{n}][,file=@var{file}][,len=@var{len}]
1248 Dump network traffic on VLAN @var{n} to file @var{file} (@file{qemu-vlan0.pcap} by default).
1249 At most @var{len} bytes (64k by default) per packet are stored. The file format is
1250 libpcap, so it can be analyzed with tools such as tcpdump or Wireshark.
1251
1252 @item -net none
1253 Indicate that no network devices should be configured. It is used to
1254 override the default configuration (@option{-net nic -net user}) which
1255 is activated if no @option{-net} options are provided.
1256
1257 @end table
1258 ETEXI
1259
1260 DEFHEADING()
1261
1262 DEFHEADING(Character device options:)
1263
1264 DEF("chardev", HAS_ARG, QEMU_OPTION_chardev,
1265     "-chardev null,id=id[,mux=on|off]\n"
1266     "-chardev socket,id=id[,host=host],port=host[,to=to][,ipv4][,ipv6][,nodelay]\n"
1267     "         [,server][,nowait][,telnet][,mux=on|off] (tcp)\n"
1268     "-chardev socket,id=id,path=path[,server][,nowait][,telnet],[mux=on|off] (unix)\n"
1269     "-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]\n"
1270     "         [,localport=localport][,ipv4][,ipv6][,mux=on|off]\n"
1271     "-chardev msmouse,id=id[,mux=on|off]\n"
1272     "-chardev vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]\n"
1273     "         [,mux=on|off]\n"
1274     "-chardev file,id=id,path=path[,mux=on|off]\n"
1275     "-chardev pipe,id=id,path=path[,mux=on|off]\n"
1276 #ifdef _WIN32
1277     "-chardev console,id=id[,mux=on|off]\n"
1278     "-chardev serial,id=id,path=path[,mux=on|off]\n"
1279 #else
1280     "-chardev pty,id=id[,mux=on|off]\n"
1281     "-chardev stdio,id=id[,mux=on|off][,signal=on|off]\n"
1282 #endif
1283 #ifdef CONFIG_BRLAPI
1284     "-chardev braille,id=id[,mux=on|off]\n"
1285 #endif
1286 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1287         || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
1288     "-chardev tty,id=id,path=path[,mux=on|off]\n"
1289 #endif
1290 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__)
1291     "-chardev parport,id=id,path=path[,mux=on|off]\n"
1292 #endif
1293     , QEMU_ARCH_ALL
1294 )
1295
1296 STEXI
1297
1298 The general form of a character device option is:
1299 @table @option
1300
1301 @item -chardev @var{backend} ,id=@var{id} [,mux=on|off] [,@var{options}]
1302 @findex -chardev
1303 Backend is one of:
1304 @option{null},
1305 @option{socket},
1306 @option{udp},
1307 @option{msmouse},
1308 @option{vc},
1309 @option{file},
1310 @option{pipe},
1311 @option{console},
1312 @option{serial},
1313 @option{pty},
1314 @option{stdio},
1315 @option{braille},
1316 @option{tty},
1317 @option{parport}.
1318 The specific backend will determine the applicable options.
1319
1320 All devices must have an id, which can be any string up to 127 characters long.
1321 It is used to uniquely identify this device in other command line directives.
1322
1323 A character device may be used in multiplexing mode by multiple front-ends.
1324 The key sequence of @key{Control-a} and @key{c} will rotate the input focus
1325 between attached front-ends. Specify @option{mux=on} to enable this mode.
1326
1327 Options to each backend are described below.
1328
1329 @item -chardev null ,id=@var{id}
1330 A void device. This device will not emit any data, and will drop any data it
1331 receives. The null backend does not take any options.
1332
1333 @item -chardev socket ,id=@var{id} [@var{TCP options} or @var{unix options}] [,server] [,nowait] [,telnet]
1334
1335 Create a two-way stream socket, which can be either a TCP or a unix socket. A
1336 unix socket will be created if @option{path} is specified. Behaviour is
1337 undefined if TCP options are specified for a unix socket.
1338
1339 @option{server} specifies that the socket shall be a listening socket.
1340
1341 @option{nowait} specifies that QEMU should not block waiting for a client to
1342 connect to a listening socket.
1343
1344 @option{telnet} specifies that traffic on the socket should interpret telnet
1345 escape sequences.
1346
1347 TCP and unix socket options are given below:
1348
1349 @table @option
1350
1351 @item TCP options: port=@var{port} [,host=@var{host}] [,to=@var{to}] [,ipv4] [,ipv6] [,nodelay]
1352
1353 @option{host} for a listening socket specifies the local address to be bound.
1354 For a connecting socket species the remote host to connect to. @option{host} is
1355 optional for listening sockets. If not specified it defaults to @code{0.0.0.0}.
1356
1357 @option{port} for a listening socket specifies the local port to be bound. For a
1358 connecting socket specifies the port on the remote host to connect to.
1359 @option{port} can be given as either a port number or a service name.
1360 @option{port} is required.
1361
1362 @option{to} is only relevant to listening sockets. If it is specified, and
1363 @option{port} cannot be bound, QEMU will attempt to bind to subsequent ports up
1364 to and including @option{to} until it succeeds. @option{to} must be specified
1365 as a port number.
1366
1367 @option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used.
1368 If neither is specified the socket may use either protocol.
1369
1370 @option{nodelay} disables the Nagle algorithm.
1371
1372 @item unix options: path=@var{path}
1373
1374 @option{path} specifies the local path of the unix socket. @option{path} is
1375 required.
1376
1377 @end table
1378
1379 @item -chardev udp ,id=@var{id} [,host=@var{host}] ,port=@var{port} [,localaddr=@var{localaddr}] [,localport=@var{localport}] [,ipv4] [,ipv6]
1380
1381 Sends all traffic from the guest to a remote host over UDP.
1382
1383 @option{host} specifies the remote host to connect to. If not specified it
1384 defaults to @code{localhost}.
1385
1386 @option{port} specifies the port on the remote host to connect to. @option{port}
1387 is required.
1388
1389 @option{localaddr} specifies the local address to bind to. If not specified it
1390 defaults to @code{0.0.0.0}.
1391
1392 @option{localport} specifies the local port to bind to. If not specified any
1393 available local port will be used.
1394
1395 @option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used.
1396 If neither is specified the device may use either protocol.
1397
1398 @item -chardev msmouse ,id=@var{id}
1399
1400 Forward QEMU's emulated msmouse events to the guest. @option{msmouse} does not
1401 take any options.
1402
1403 @item -chardev vc ,id=@var{id} [[,width=@var{width}] [,height=@var{height}]] [[,cols=@var{cols}] [,rows=@var{rows}]]
1404
1405 Connect to a QEMU text console. @option{vc} may optionally be given a specific
1406 size.
1407
1408 @option{width} and @option{height} specify the width and height respectively of
1409 the console, in pixels.
1410
1411 @option{cols} and @option{rows} specify that the console be sized to fit a text
1412 console with the given dimensions.
1413
1414 @item -chardev file ,id=@var{id} ,path=@var{path}
1415
1416 Log all traffic received from the guest to a file.
1417
1418 @option{path} specifies the path of the file to be opened. This file will be
1419 created if it does not already exist, and overwritten if it does. @option{path}
1420 is required.
1421
1422 @item -chardev pipe ,id=@var{id} ,path=@var{path}
1423
1424 Create a two-way connection to the guest. The behaviour differs slightly between
1425 Windows hosts and other hosts:
1426
1427 On Windows, a single duplex pipe will be created at
1428 @file{\\.pipe\@option{path}}.
1429
1430 On other hosts, 2 pipes will be created called @file{@option{path}.in} and
1431 @file{@option{path}.out}. Data written to @file{@option{path}.in} will be
1432 received by the guest. Data written by the guest can be read from
1433 @file{@option{path}.out}. QEMU will not create these fifos, and requires them to
1434 be present.
1435
1436 @option{path} forms part of the pipe path as described above. @option{path} is
1437 required.
1438
1439 @item -chardev console ,id=@var{id}
1440
1441 Send traffic from the guest to QEMU's standard output. @option{console} does not
1442 take any options.
1443
1444 @option{console} is only available on Windows hosts.
1445
1446 @item -chardev serial ,id=@var{id} ,path=@option{path}
1447
1448 Send traffic from the guest to a serial device on the host.
1449
1450 @option{serial} is
1451 only available on Windows hosts.
1452
1453 @option{path} specifies the name of the serial device to open.
1454
1455 @item -chardev pty ,id=@var{id}
1456
1457 Create a new pseudo-terminal on the host and connect to it. @option{pty} does
1458 not take any options.
1459
1460 @option{pty} is not available on Windows hosts.
1461
1462 @item -chardev stdio ,id=@var{id} [,signal=on|off]
1463 Connect to standard input and standard output of the qemu process.
1464
1465 @option{signal} controls if signals are enabled on the terminal, that includes
1466 exiting QEMU with the key sequence @key{Control-c}. This option is enabled by
1467 default, use @option{signal=off} to disable it.
1468
1469 @option{stdio} is not available on Windows hosts.
1470
1471 @item -chardev braille ,id=@var{id}
1472
1473 Connect to a local BrlAPI server. @option{braille} does not take any options.
1474
1475 @item -chardev tty ,id=@var{id} ,path=@var{path}
1476
1477 Connect to a local tty device.
1478
1479 @option{tty} is only available on Linux, Sun, FreeBSD, NetBSD, OpenBSD and
1480 DragonFlyBSD hosts.
1481
1482 @option{path} specifies the path to the tty. @option{path} is required.
1483
1484 @item -chardev parport ,id=@var{id} ,path=@var{path}
1485
1486 @option{parport} is only available on Linux, FreeBSD and DragonFlyBSD hosts.
1487
1488 Connect to a local parallel port.
1489
1490 @option{path} specifies the path to the parallel port device. @option{path} is
1491 required.
1492
1493 @end table
1494 ETEXI
1495
1496 DEFHEADING()
1497
1498 DEFHEADING(Bluetooth(R) options:)
1499
1500 DEF("bt", HAS_ARG, QEMU_OPTION_bt, \
1501     "-bt hci,null    dumb bluetooth HCI - doesn't respond to commands\n" \
1502     "-bt hci,host[:id]\n" \
1503     "                use host's HCI with the given name\n" \
1504     "-bt hci[,vlan=n]\n" \
1505     "                emulate a standard HCI in virtual scatternet 'n'\n" \
1506     "-bt vhci[,vlan=n]\n" \
1507     "                add host computer to virtual scatternet 'n' using VHCI\n" \
1508     "-bt device:dev[,vlan=n]\n" \
1509     "                emulate a bluetooth device 'dev' in scatternet 'n'\n",
1510     QEMU_ARCH_ALL)
1511 STEXI
1512 @table @option
1513
1514 @item -bt hci[...]
1515 @findex -bt
1516 Defines the function of the corresponding Bluetooth HCI.  -bt options
1517 are matched with the HCIs present in the chosen machine type.  For
1518 example when emulating a machine with only one HCI built into it, only
1519 the first @code{-bt hci[...]} option is valid and defines the HCI's
1520 logic.  The Transport Layer is decided by the machine type.  Currently
1521 the machines @code{n800} and @code{n810} have one HCI and all other
1522 machines have none.
1523
1524 @anchor{bt-hcis}
1525 The following three types are recognized:
1526
1527 @table @option
1528 @item -bt hci,null
1529 (default) The corresponding Bluetooth HCI assumes no internal logic
1530 and will not respond to any HCI commands or emit events.
1531
1532 @item -bt hci,host[:@var{id}]
1533 (@code{bluez} only) The corresponding HCI passes commands / events
1534 to / from the physical HCI identified by the name @var{id} (default:
1535 @code{hci0}) on the computer running QEMU.  Only available on @code{bluez}
1536 capable systems like Linux.
1537
1538 @item -bt hci[,vlan=@var{n}]
1539 Add a virtual, standard HCI that will participate in the Bluetooth
1540 scatternet @var{n} (default @code{0}).  Similarly to @option{-net}
1541 VLANs, devices inside a bluetooth network @var{n} can only communicate
1542 with other devices in the same network (scatternet).
1543 @end table
1544
1545 @item -bt vhci[,vlan=@var{n}]
1546 (Linux-host only) Create a HCI in scatternet @var{n} (default 0) attached
1547 to the host bluetooth stack instead of to the emulated target.  This
1548 allows the host and target machines to participate in a common scatternet
1549 and communicate.  Requires the Linux @code{vhci} driver installed.  Can
1550 be used as following:
1551
1552 @example
1553 qemu [...OPTIONS...] -bt hci,vlan=5 -bt vhci,vlan=5
1554 @end example
1555
1556 @item -bt device:@var{dev}[,vlan=@var{n}]
1557 Emulate a bluetooth device @var{dev} and place it in network @var{n}
1558 (default @code{0}).  QEMU can only emulate one type of bluetooth devices
1559 currently:
1560
1561 @table @option
1562 @item keyboard
1563 Virtual wireless keyboard implementing the HIDP bluetooth profile.
1564 @end table
1565 @end table
1566 ETEXI
1567
1568 DEFHEADING()
1569
1570 DEFHEADING(Linux/Multiboot boot specific:)
1571 STEXI
1572
1573 When using these options, you can use a given Linux or Multiboot
1574 kernel without installing it in the disk image. It can be useful
1575 for easier testing of various kernels.
1576
1577 @table @option
1578 ETEXI
1579
1580 DEF("kernel", HAS_ARG, QEMU_OPTION_kernel, \
1581     "-kernel bzImage use 'bzImage' as kernel image\n", QEMU_ARCH_ALL)
1582 STEXI
1583 @item -kernel @var{bzImage}
1584 @findex -kernel
1585 Use @var{bzImage} as kernel image. The kernel can be either a Linux kernel
1586 or in multiboot format.
1587 ETEXI
1588
1589 DEF("append", HAS_ARG, QEMU_OPTION_append, \
1590     "-append cmdline use 'cmdline' as kernel command line\n", QEMU_ARCH_ALL)
1591 STEXI
1592 @item -append @var{cmdline}
1593 @findex -append
1594 Use @var{cmdline} as kernel command line
1595 ETEXI
1596
1597 DEF("initrd", HAS_ARG, QEMU_OPTION_initrd, \
1598            "-initrd file    use 'file' as initial ram disk\n", QEMU_ARCH_ALL)
1599 STEXI
1600 @item -initrd @var{file}
1601 @findex -initrd
1602 Use @var{file} as initial ram disk.
1603
1604 @item -initrd "@var{file1} arg=foo,@var{file2}"
1605
1606 This syntax is only available with multiboot.
1607
1608 Use @var{file1} and @var{file2} as modules and pass arg=foo as parameter to the
1609 first module.
1610 ETEXI
1611
1612 STEXI
1613 @end table
1614 ETEXI
1615
1616 DEFHEADING()
1617
1618 DEFHEADING(Debug/Expert options:)
1619
1620 STEXI
1621 @table @option
1622 ETEXI
1623
1624 DEF("serial", HAS_ARG, QEMU_OPTION_serial, \
1625     "-serial dev     redirect the serial port to char device 'dev'\n",
1626     QEMU_ARCH_ALL)
1627 STEXI
1628 @item -serial @var{dev}
1629 @findex -serial
1630 Redirect the virtual serial port to host character device
1631 @var{dev}. The default device is @code{vc} in graphical mode and
1632 @code{stdio} in non graphical mode.
1633
1634 This option can be used several times to simulate up to 4 serial
1635 ports.
1636
1637 Use @code{-serial none} to disable all serial ports.
1638
1639 Available character devices are:
1640 @table @option
1641 @item vc[:@var{W}x@var{H}]
1642 Virtual console. Optionally, a width and height can be given in pixel with
1643 @example
1644 vc:800x600
1645 @end example
1646 It is also possible to specify width or height in characters:
1647 @example
1648 vc:80Cx24C
1649 @end example
1650 @item pty
1651 [Linux only] Pseudo TTY (a new PTY is automatically allocated)
1652 @item none
1653 No device is allocated.
1654 @item null
1655 void device
1656 @item /dev/XXX
1657 [Linux only] Use host tty, e.g. @file{/dev/ttyS0}. The host serial port
1658 parameters are set according to the emulated ones.
1659 @item /dev/parport@var{N}
1660 [Linux only, parallel port only] Use host parallel port
1661 @var{N}. Currently SPP and EPP parallel port features can be used.
1662 @item file:@var{filename}
1663 Write output to @var{filename}. No character can be read.
1664 @item stdio
1665 [Unix only] standard input/output
1666 @item pipe:@var{filename}
1667 name pipe @var{filename}
1668 @item COM@var{n}
1669 [Windows only] Use host serial port @var{n}
1670 @item udp:[@var{remote_host}]:@var{remote_port}[@@[@var{src_ip}]:@var{src_port}]
1671 This implements UDP Net Console.
1672 When @var{remote_host} or @var{src_ip} are not specified
1673 they default to @code{0.0.0.0}.
1674 When not using a specified @var{src_port} a random port is automatically chosen.
1675
1676 If you just want a simple readonly console you can use @code{netcat} or
1677 @code{nc}, by starting qemu with: @code{-serial udp::4555} and nc as:
1678 @code{nc -u -l -p 4555}. Any time qemu writes something to that port it
1679 will appear in the netconsole session.
1680
1681 If you plan to send characters back via netconsole or you want to stop
1682 and start qemu a lot of times, you should have qemu use the same
1683 source port each time by using something like @code{-serial
1684 udp::4555@@:4556} to qemu. Another approach is to use a patched
1685 version of netcat which can listen to a TCP port and send and receive
1686 characters via udp.  If you have a patched version of netcat which
1687 activates telnet remote echo and single char transfer, then you can
1688 use the following options to step up a netcat redirector to allow
1689 telnet on port 5555 to access the qemu port.
1690 @table @code
1691 @item Qemu Options:
1692 -serial udp::4555@@:4556
1693 @item netcat options:
1694 -u -P 4555 -L 0.0.0.0:4556 -t -p 5555 -I -T
1695 @item telnet options:
1696 localhost 5555
1697 @end table
1698
1699 @item tcp:[@var{host}]:@var{port}[,@var{server}][,nowait][,nodelay]
1700 The TCP Net Console has two modes of operation.  It can send the serial
1701 I/O to a location or wait for a connection from a location.  By default
1702 the TCP Net Console is sent to @var{host} at the @var{port}.  If you use
1703 the @var{server} option QEMU will wait for a client socket application
1704 to connect to the port before continuing, unless the @code{nowait}
1705 option was specified.  The @code{nodelay} option disables the Nagle buffering
1706 algorithm.  If @var{host} is omitted, 0.0.0.0 is assumed. Only
1707 one TCP connection at a time is accepted. You can use @code{telnet} to
1708 connect to the corresponding character device.
1709 @table @code
1710 @item Example to send tcp console to 192.168.0.2 port 4444
1711 -serial tcp:192.168.0.2:4444
1712 @item Example to listen and wait on port 4444 for connection
1713 -serial tcp::4444,server
1714 @item Example to not wait and listen on ip 192.168.0.100 port 4444
1715 -serial tcp:192.168.0.100:4444,server,nowait
1716 @end table
1717
1718 @item telnet:@var{host}:@var{port}[,server][,nowait][,nodelay]
1719 The telnet protocol is used instead of raw tcp sockets.  The options
1720 work the same as if you had specified @code{-serial tcp}.  The
1721 difference is that the port acts like a telnet server or client using
1722 telnet option negotiation.  This will also allow you to send the
1723 MAGIC_SYSRQ sequence if you use a telnet that supports sending the break
1724 sequence.  Typically in unix telnet you do it with Control-] and then
1725 type "send break" followed by pressing the enter key.
1726
1727 @item unix:@var{path}[,server][,nowait]
1728 A unix domain socket is used instead of a tcp socket.  The option works the
1729 same as if you had specified @code{-serial tcp} except the unix domain socket
1730 @var{path} is used for connections.
1731
1732 @item mon:@var{dev_string}
1733 This is a special option to allow the monitor to be multiplexed onto
1734 another serial port.  The monitor is accessed with key sequence of
1735 @key{Control-a} and then pressing @key{c}. See monitor access
1736 @ref{pcsys_keys} in the -nographic section for more keys.
1737 @var{dev_string} should be any one of the serial devices specified
1738 above.  An example to multiplex the monitor onto a telnet server
1739 listening on port 4444 would be:
1740 @table @code
1741 @item -serial mon:telnet::4444,server,nowait
1742 @end table
1743
1744 @item braille
1745 Braille device.  This will use BrlAPI to display the braille output on a real
1746 or fake device.
1747
1748 @item msmouse
1749 Three button serial mouse. Configure the guest to use Microsoft protocol.
1750 @end table
1751 ETEXI
1752
1753 DEF("parallel", HAS_ARG, QEMU_OPTION_parallel, \
1754     "-parallel dev   redirect the parallel port to char device 'dev'\n",
1755     QEMU_ARCH_ALL)
1756 STEXI
1757 @item -parallel @var{dev}
1758 @findex -parallel
1759 Redirect the virtual parallel port to host device @var{dev} (same
1760 devices as the serial port). On Linux hosts, @file{/dev/parportN} can
1761 be used to use hardware devices connected on the corresponding host
1762 parallel port.
1763
1764 This option can be used several times to simulate up to 3 parallel
1765 ports.
1766
1767 Use @code{-parallel none} to disable all parallel ports.
1768 ETEXI
1769
1770 DEF("monitor", HAS_ARG, QEMU_OPTION_monitor, \
1771     "-monitor dev    redirect the monitor to char device 'dev'\n",
1772     QEMU_ARCH_ALL)
1773 STEXI
1774 @item -monitor @var{dev}
1775 @findex -monitor
1776 Redirect the monitor to host device @var{dev} (same devices as the
1777 serial port).
1778 The default device is @code{vc} in graphical mode and @code{stdio} in
1779 non graphical mode.
1780 ETEXI
1781 DEF("qmp", HAS_ARG, QEMU_OPTION_qmp, \
1782     "-qmp dev        like -monitor but opens in 'control' mode\n",
1783     QEMU_ARCH_ALL)
1784 STEXI
1785 @item -qmp @var{dev}
1786 @findex -qmp
1787 Like -monitor but opens in 'control' mode.
1788 ETEXI
1789
1790 DEF("mon", HAS_ARG, QEMU_OPTION_mon, \
1791     "-mon chardev=[name][,mode=readline|control][,default]\n", QEMU_ARCH_ALL)
1792 STEXI
1793 @item -mon chardev=[name][,mode=readline|control][,default]
1794 @findex -mon
1795 Setup monitor on chardev @var{name}.
1796 ETEXI
1797
1798 DEF("debugcon", HAS_ARG, QEMU_OPTION_debugcon, \
1799     "-debugcon dev   redirect the debug console to char device 'dev'\n",
1800     QEMU_ARCH_ALL)
1801 STEXI
1802 @item -debugcon @var{dev}
1803 @findex -debugcon
1804 Redirect the debug console to host device @var{dev} (same devices as the
1805 serial port).  The debug console is an I/O port which is typically port
1806 0xe9; writing to that I/O port sends output to this device.
1807 The default device is @code{vc} in graphical mode and @code{stdio} in
1808 non graphical mode.
1809 ETEXI
1810
1811 DEF("pidfile", HAS_ARG, QEMU_OPTION_pidfile, \
1812     "-pidfile file   write PID to 'file'\n", QEMU_ARCH_ALL)
1813 STEXI
1814 @item -pidfile @var{file}
1815 @findex -pidfile
1816 Store the QEMU process PID in @var{file}. It is useful if you launch QEMU
1817 from a script.
1818 ETEXI
1819
1820 DEF("singlestep", 0, QEMU_OPTION_singlestep, \
1821     "-singlestep     always run in singlestep mode\n", QEMU_ARCH_ALL)
1822 STEXI
1823 @item -singlestep
1824 @findex -singlestep
1825 Run the emulation in single step mode.
1826 ETEXI
1827
1828 DEF("S", 0, QEMU_OPTION_S, \
1829     "-S              freeze CPU at startup (use 'c' to start execution)\n",
1830     QEMU_ARCH_ALL)
1831 STEXI
1832 @item -S
1833 @findex -S
1834 Do not start CPU at startup (you must type 'c' in the monitor).
1835 ETEXI
1836
1837 DEF("gdb", HAS_ARG, QEMU_OPTION_gdb, \
1838     "-gdb dev        wait for gdb connection on 'dev'\n", QEMU_ARCH_ALL)
1839 STEXI
1840 @item -gdb @var{dev}
1841 @findex -gdb
1842 Wait for gdb connection on device @var{dev} (@pxref{gdb_usage}). Typical
1843 connections will likely be TCP-based, but also UDP, pseudo TTY, or even
1844 stdio are reasonable use case. The latter is allowing to start qemu from
1845 within gdb and establish the connection via a pipe:
1846 @example
1847 (gdb) target remote | exec qemu -gdb stdio ...
1848 @end example
1849 ETEXI
1850
1851 DEF("s", 0, QEMU_OPTION_s, \
1852     "-s              shorthand for -gdb tcp::" DEFAULT_GDBSTUB_PORT "\n",
1853     QEMU_ARCH_ALL)
1854 STEXI
1855 @item -s
1856 @findex -s
1857 Shorthand for -gdb tcp::1234, i.e. open a gdbserver on TCP port 1234
1858 (@pxref{gdb_usage}).
1859 ETEXI
1860
1861 DEF("d", HAS_ARG, QEMU_OPTION_d, \
1862     "-d item1,...    output log to /tmp/qemu.log (use -d ? for a list of log items)\n",
1863     QEMU_ARCH_ALL)
1864 STEXI
1865 @item -d
1866 @findex -d
1867 Output log in /tmp/qemu.log
1868 ETEXI
1869
1870 DEF("hdachs", HAS_ARG, QEMU_OPTION_hdachs, \
1871     "-hdachs c,h,s[,t]\n" \
1872     "                force hard disk 0 physical geometry and the optional BIOS\n" \
1873     "                translation (t=none or lba) (usually qemu can guess them)\n",
1874     QEMU_ARCH_ALL)
1875 STEXI
1876 @item -hdachs @var{c},@var{h},@var{s},[,@var{t}]
1877 @findex -hdachs
1878 Force hard disk 0 physical geometry (1 <= @var{c} <= 16383, 1 <=
1879 @var{h} <= 16, 1 <= @var{s} <= 63) and optionally force the BIOS
1880 translation mode (@var{t}=none, lba or auto). Usually QEMU can guess
1881 all those parameters. This option is useful for old MS-DOS disk
1882 images.
1883 ETEXI
1884
1885 DEF("L", HAS_ARG, QEMU_OPTION_L, \
1886     "-L path         set the directory for the BIOS, VGA BIOS and keymaps\n",
1887     QEMU_ARCH_ALL)
1888 STEXI
1889 @item -L  @var{path}
1890 @findex -L
1891 Set the directory for the BIOS, VGA BIOS and keymaps.
1892 ETEXI
1893
1894 DEF("bios", HAS_ARG, QEMU_OPTION_bios, \
1895     "-bios file      set the filename for the BIOS\n", QEMU_ARCH_ALL)
1896 STEXI
1897 @item -bios @var{file}
1898 @findex -bios
1899 Set the filename for the BIOS.
1900 ETEXI
1901
1902 DEF("enable-kvm", 0, QEMU_OPTION_enable_kvm, \
1903     "-enable-kvm     enable KVM full virtualization support\n", QEMU_ARCH_ALL)
1904 STEXI
1905 @item -enable-kvm
1906 @findex -enable-kvm
1907 Enable KVM full virtualization support. This option is only available
1908 if KVM support is enabled when compiling.
1909 ETEXI
1910
1911 DEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid,
1912     "-xen-domid id   specify xen guest domain id\n", QEMU_ARCH_ALL)
1913 DEF("xen-create", 0, QEMU_OPTION_xen_create,
1914     "-xen-create     create domain using xen hypercalls, bypassing xend\n"
1915     "                warning: should not be used when xend is in use\n",
1916     QEMU_ARCH_ALL)
1917 DEF("xen-attach", 0, QEMU_OPTION_xen_attach,
1918     "-xen-attach     attach to existing xen domain\n"
1919     "                xend will use this when starting qemu\n",
1920     QEMU_ARCH_ALL)
1921 STEXI
1922 @item -xen-domid @var{id}
1923 @findex -xen-domid
1924 Specify xen guest domain @var{id} (XEN only).
1925 @item -xen-create
1926 @findex -xen-create
1927 Create domain using xen hypercalls, bypassing xend.
1928 Warning: should not be used when xend is in use (XEN only).
1929 @item -xen-attach
1930 @findex -xen-attach
1931 Attach to existing xen domain.
1932 xend will use this when starting qemu (XEN only).
1933 ETEXI
1934
1935 DEF("no-reboot", 0, QEMU_OPTION_no_reboot, \
1936     "-no-reboot      exit instead of rebooting\n", QEMU_ARCH_ALL)
1937 STEXI
1938 @item -no-reboot
1939 @findex -no-reboot
1940 Exit instead of rebooting.
1941 ETEXI
1942
1943 DEF("no-shutdown", 0, QEMU_OPTION_no_shutdown, \
1944     "-no-shutdown    stop before shutdown\n", QEMU_ARCH_ALL)
1945 STEXI
1946 @item -no-shutdown
1947 @findex -no-shutdown
1948 Don't exit QEMU on guest shutdown, but instead only stop the emulation.
1949 This allows for instance switching to monitor to commit changes to the
1950 disk image.
1951 ETEXI
1952
1953 DEF("loadvm", HAS_ARG, QEMU_OPTION_loadvm, \
1954     "-loadvm [tag|id]\n" \
1955     "                start right away with a saved state (loadvm in monitor)\n",
1956     QEMU_ARCH_ALL)
1957 STEXI
1958 @item -loadvm @var{file}
1959 @findex -loadvm
1960 Start right away with a saved state (@code{loadvm} in monitor)
1961 ETEXI
1962
1963 #ifndef _WIN32
1964 DEF("daemonize", 0, QEMU_OPTION_daemonize, \
1965     "-daemonize      daemonize QEMU after initializing\n", QEMU_ARCH_ALL)
1966 #endif
1967 STEXI
1968 @item -daemonize
1969 @findex -daemonize
1970 Daemonize the QEMU process after initialization.  QEMU will not detach from
1971 standard IO until it is ready to receive connections on any of its devices.
1972 This option is a useful way for external programs to launch QEMU without having
1973 to cope with initialization race conditions.
1974 ETEXI
1975
1976 DEF("option-rom", HAS_ARG, QEMU_OPTION_option_rom, \
1977     "-option-rom rom load a file, rom, into the option ROM space\n",
1978     QEMU_ARCH_ALL)
1979 STEXI
1980 @item -option-rom @var{file}
1981 @findex -option-rom
1982 Load the contents of @var{file} as an option ROM.
1983 This option is useful to load things like EtherBoot.
1984 ETEXI
1985
1986 DEF("clock", HAS_ARG, QEMU_OPTION_clock, \
1987     "-clock          force the use of the given methods for timer alarm.\n" \
1988     "                To see what timers are available use -clock ?\n",
1989     QEMU_ARCH_ALL)
1990 STEXI
1991 @item -clock @var{method}
1992 @findex -clock
1993 Force the use of the given methods for timer alarm. To see what timers
1994 are available use -clock ?.
1995 ETEXI
1996
1997 HXCOMM Options deprecated by -rtc
1998 DEF("localtime", 0, QEMU_OPTION_localtime, "", QEMU_ARCH_ALL)
1999 DEF("startdate", HAS_ARG, QEMU_OPTION_startdate, "", QEMU_ARCH_ALL)
2000
2001 DEF("rtc", HAS_ARG, QEMU_OPTION_rtc, \
2002     "-rtc [base=utc|localtime|date][,clock=host|vm][,driftfix=none|slew]\n" \
2003     "                set the RTC base and clock, enable drift fix for clock ticks (x86 only)\n",
2004     QEMU_ARCH_ALL)
2005
2006 STEXI
2007
2008 @item -rtc [base=utc|localtime|@var{date}][,clock=host|vm][,driftfix=none|slew]
2009 @findex -rtc
2010 Specify @option{base} as @code{utc} or @code{localtime} to let the RTC start at the current
2011 UTC or local time, respectively. @code{localtime} is required for correct date in
2012 MS-DOS or Windows. To start at a specific point in time, provide @var{date} in the
2013 format @code{2006-06-17T16:01:21} or @code{2006-06-17}. The default base is UTC.
2014
2015 By default the RTC is driven by the host system time. This allows to use the
2016 RTC as accurate reference clock inside the guest, specifically if the host
2017 time is smoothly following an accurate external reference clock, e.g. via NTP.
2018 If you want to isolate the guest time from the host, even prevent it from
2019 progressing during suspension, you can set @option{clock} to @code{vm} instead.
2020
2021 Enable @option{driftfix} (i386 targets only) if you experience time drift problems,
2022 specifically with Windows' ACPI HAL. This option will try to figure out how
2023 many timer interrupts were not processed by the Windows guest and will
2024 re-inject them.
2025 ETEXI
2026
2027 DEF("icount", HAS_ARG, QEMU_OPTION_icount, \
2028     "-icount [N|auto]\n" \
2029     "                enable virtual instruction counter with 2^N clock ticks per\n" \
2030     "                instruction\n", QEMU_ARCH_ALL)
2031 STEXI
2032 @item -icount [@var{N}|auto]
2033 @findex -icount
2034 Enable virtual instruction counter.  The virtual cpu will execute one
2035 instruction every 2^@var{N} ns of virtual time.  If @code{auto} is specified
2036 then the virtual cpu speed will be automatically adjusted to keep virtual
2037 time within a few seconds of real time.
2038
2039 Note that while this option can give deterministic behavior, it does not
2040 provide cycle accurate emulation.  Modern CPUs contain superscalar out of
2041 order cores with complex cache hierarchies.  The number of instructions
2042 executed often has little or no correlation with actual performance.
2043 ETEXI
2044
2045 DEF("watchdog", HAS_ARG, QEMU_OPTION_watchdog, \
2046     "-watchdog i6300esb|ib700\n" \
2047     "                enable virtual hardware watchdog [default=none]\n",
2048     QEMU_ARCH_ALL)
2049 STEXI
2050 @item -watchdog @var{model}
2051 @findex -watchdog
2052 Create a virtual hardware watchdog device.  Once enabled (by a guest
2053 action), the watchdog must be periodically polled by an agent inside
2054 the guest or else the guest will be restarted.
2055
2056 The @var{model} is the model of hardware watchdog to emulate.  Choices
2057 for model are: @code{ib700} (iBASE 700) which is a very simple ISA
2058 watchdog with a single timer, or @code{i6300esb} (Intel 6300ESB I/O
2059 controller hub) which is a much more featureful PCI-based dual-timer
2060 watchdog.  Choose a model for which your guest has drivers.
2061
2062 Use @code{-watchdog ?} to list available hardware models.  Only one
2063 watchdog can be enabled for a guest.
2064 ETEXI
2065
2066 DEF("watchdog-action", HAS_ARG, QEMU_OPTION_watchdog_action, \
2067     "-watchdog-action reset|shutdown|poweroff|pause|debug|none\n" \
2068     "                action when watchdog fires [default=reset]\n",
2069     QEMU_ARCH_ALL)
2070 STEXI
2071 @item -watchdog-action @var{action}
2072
2073 The @var{action} controls what QEMU will do when the watchdog timer
2074 expires.
2075 The default is
2076 @code{reset} (forcefully reset the guest).
2077 Other possible actions are:
2078 @code{shutdown} (attempt to gracefully shutdown the guest),
2079 @code{poweroff} (forcefully poweroff the guest),
2080 @code{pause} (pause the guest),
2081 @code{debug} (print a debug message and continue), or
2082 @code{none} (do nothing).
2083
2084 Note that the @code{shutdown} action requires that the guest responds
2085 to ACPI signals, which it may not be able to do in the sort of
2086 situations where the watchdog would have expired, and thus
2087 @code{-watchdog-action shutdown} is not recommended for production use.
2088
2089 Examples:
2090
2091 @table @code
2092 @item -watchdog i6300esb -watchdog-action pause
2093 @item -watchdog ib700
2094 @end table
2095 ETEXI
2096
2097 DEF("echr", HAS_ARG, QEMU_OPTION_echr, \
2098     "-echr chr       set terminal escape character instead of ctrl-a\n",
2099     QEMU_ARCH_ALL)
2100 STEXI
2101
2102 @item -echr @var{numeric_ascii_value}
2103 @findex -echr
2104 Change the escape character used for switching to the monitor when using
2105 monitor and serial sharing.  The default is @code{0x01} when using the
2106 @code{-nographic} option.  @code{0x01} is equal to pressing
2107 @code{Control-a}.  You can select a different character from the ascii
2108 control keys where 1 through 26 map to Control-a through Control-z.  For
2109 instance you could use the either of the following to change the escape
2110 character to Control-t.
2111 @table @code
2112 @item -echr 0x14
2113 @item -echr 20
2114 @end table
2115 ETEXI
2116
2117 DEF("virtioconsole", HAS_ARG, QEMU_OPTION_virtiocon, \
2118     "-virtioconsole c\n" \
2119     "                set virtio console\n", QEMU_ARCH_ALL)
2120 STEXI
2121 @item -virtioconsole @var{c}
2122 @findex -virtioconsole
2123 Set virtio console.
2124
2125 This option is maintained for backward compatibility.
2126
2127 Please use @code{-device virtconsole} for the new way of invocation.
2128 ETEXI
2129
2130 DEF("show-cursor", 0, QEMU_OPTION_show_cursor, \
2131     "-show-cursor    show cursor\n", QEMU_ARCH_ALL)
2132 STEXI
2133 @item -show-cursor
2134 @findex -show-cursor
2135 Show cursor.
2136 ETEXI
2137
2138 DEF("tb-size", HAS_ARG, QEMU_OPTION_tb_size, \
2139     "-tb-size n      set TB size\n", QEMU_ARCH_ALL)
2140 STEXI
2141 @item -tb-size @var{n}
2142 @findex -tb-size
2143 Set TB size.
2144 ETEXI
2145
2146 DEF("incoming", HAS_ARG, QEMU_OPTION_incoming, \
2147     "-incoming p     prepare for incoming migration, listen on port p\n",
2148     QEMU_ARCH_ALL)
2149 STEXI
2150 @item -incoming @var{port}
2151 @findex -incoming
2152 Prepare for incoming migration, listen on @var{port}.
2153 ETEXI
2154
2155 DEF("nodefaults", 0, QEMU_OPTION_nodefaults, \
2156     "-nodefaults     don't create default devices\n", QEMU_ARCH_ALL)
2157 STEXI
2158 @item -nodefaults
2159 @findex -nodefaults
2160 Don't create default devices.
2161 ETEXI
2162
2163 #ifndef _WIN32
2164 DEF("chroot", HAS_ARG, QEMU_OPTION_chroot, \
2165     "-chroot dir     chroot to dir just before starting the VM\n",
2166     QEMU_ARCH_ALL)
2167 #endif
2168 STEXI
2169 @item -chroot @var{dir}
2170 @findex -chroot
2171 Immediately before starting guest execution, chroot to the specified
2172 directory.  Especially useful in combination with -runas.
2173 ETEXI
2174
2175 #ifndef _WIN32
2176 DEF("runas", HAS_ARG, QEMU_OPTION_runas, \
2177     "-runas user     change to user id user just before starting the VM\n",
2178     QEMU_ARCH_ALL)
2179 #endif
2180 STEXI
2181 @item -runas @var{user}
2182 @findex -runas
2183 Immediately before starting guest execution, drop root privileges, switching
2184 to the specified user.
2185 ETEXI
2186
2187 DEF("prom-env", HAS_ARG, QEMU_OPTION_prom_env,
2188     "-prom-env variable=value\n"
2189     "                set OpenBIOS nvram variables\n",
2190     QEMU_ARCH_PPC | QEMU_ARCH_SPARC)
2191 STEXI
2192 @item -prom-env @var{variable}=@var{value}
2193 @findex -prom-env
2194 Set OpenBIOS nvram @var{variable} to given @var{value} (PPC, SPARC only).
2195 ETEXI
2196 DEF("semihosting", 0, QEMU_OPTION_semihosting,
2197     "-semihosting    semihosting mode\n", QEMU_ARCH_ARM | QEMU_ARCH_M68K)
2198 STEXI
2199 @item -semihosting
2200 @findex -semihosting
2201 Semihosting mode (ARM, M68K only).
2202 ETEXI
2203 DEF("old-param", 0, QEMU_OPTION_old_param,
2204     "-old-param      old param mode\n", QEMU_ARCH_ARM)
2205 STEXI
2206 @item -old-param
2207 @findex -old-param (ARM)
2208 Old param mode (ARM only).
2209 ETEXI
2210
2211 DEF("readconfig", HAS_ARG, QEMU_OPTION_readconfig,
2212     "-readconfig <file>\n", QEMU_ARCH_ALL)
2213 STEXI
2214 @item -readconfig @var{file}
2215 @findex -readconfig
2216 Read device configuration from @var{file}.
2217 ETEXI
2218 DEF("writeconfig", HAS_ARG, QEMU_OPTION_writeconfig,
2219     "-writeconfig <file>\n"
2220     "                read/write config file\n", QEMU_ARCH_ALL)
2221 STEXI
2222 @item -writeconfig @var{file}
2223 @findex -writeconfig
2224 Write device configuration to @var{file}.
2225 ETEXI
2226 DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig,
2227     "-nodefconfig\n"
2228     "                do not load default config files at startup\n",
2229     QEMU_ARCH_ALL)
2230 STEXI
2231 @item -nodefconfig
2232 @findex -nodefconfig
2233 Normally QEMU loads a configuration file from @var{sysconfdir}/qemu.conf and
2234 @var{sysconfdir}/target-@var{ARCH}.conf on startup.  The @code{-nodefconfig}
2235 option will prevent QEMU from loading these configuration files at startup.
2236 ETEXI
2237
2238 HXCOMM This is the last statement. Insert new options before this line!
2239 STEXI
2240 @end table
2241 ETEXI