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
) is used to construct
5 HXCOMM option structures
, enums and help message
.
6 HXCOMM HXCOMM can be used
for comments
, discarded from both texi and C
8 DEFHEADING(Standard options
:)
13 DEF("help", 0, QEMU_OPTION_h
,
14 "-h or -help display this help and exit\n")
21 DEF("version", 0, QEMU_OPTION_version
,
22 "-version display version information and exit\n")
26 Display version information and exit
29 DEF("M", HAS_ARG
, QEMU_OPTION_M
,
30 "-M machine select emulated machine (-M ? for list)\n")
32 @item
-M @
var{machine
}
34 Select the emulated @
var{machine
} (@code
{-M ?
} for list
)
37 DEF("cpu", HAS_ARG
, QEMU_OPTION_cpu
,
38 "-cpu cpu select CPU (-cpu ? for list)\n")
40 @item
-cpu @
var{model
}
42 Select CPU
model (-cpu ?
for list and additional feature selection
)
45 DEF("smp", HAS_ARG
, QEMU_OPTION_smp
,
46 "-smp n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]\n"
47 " set the number of CPUs to 'n' [default=1]\n"
48 " maxcpus= maximum number of total cpus, including\n"
49 " offline CPUs for hotplug, etc\n"
50 " cores= number of CPU cores on one socket\n"
51 " threads= number of threads on one CPU core\n"
52 " sockets= number of discrete sockets in the system\n")
54 @item
-smp @
var{n
}[,cores
=@
var{cores
}][,threads
=@
var{threads
}][,sockets
=@
var{sockets
}][,maxcpus
=@
var{maxcpus
}]
56 Simulate an SMP system with @
var{n
} CPUs
. On the PC target
, up to
255
57 CPUs are supported
. On Sparc32 target
, Linux limits the number of usable CPUs
59 For the PC target
, the number of @
var{cores
} per socket
, the number
60 of @
var{threads
} per cores and the total number of @
var{sockets
} can be
61 specified
. Missing values will be computed
. If any on the three values is
62 given
, the total number of CPUs @
var{n
} can be omitted
. @
var{maxcpus
}
63 specifies the maximum number of hotpluggable CPUs
.
66 DEF("numa", HAS_ARG
, QEMU_OPTION_numa
,
67 "-numa node[,mem=size][,cpus=cpu[-cpu]][,nodeid=node]\n")
69 @item
-numa @
var{opts
}
71 Simulate a multi node NUMA system
. If mem and cpus are omitted
, resources
75 DEF("fda", HAS_ARG
, QEMU_OPTION_fda
,
76 "-fda/-fdb file use 'file' as floppy disk 0/1 image\n")
77 DEF("fdb", HAS_ARG
, QEMU_OPTION_fdb
, "")
83 Use @
var{file
} as floppy disk
0/1 image (@pxref
{disk_images
}). You can
84 use the host floppy by
using @file
{/dev
/fd0
} as
filename (@pxref
{host_drives
}).
87 DEF("hda", HAS_ARG
, QEMU_OPTION_hda
,
88 "-hda/-hdb file use 'file' as IDE hard disk 0/1 image\n")
89 DEF("hdb", HAS_ARG
, QEMU_OPTION_hdb
, "")
90 DEF("hdc", HAS_ARG
, QEMU_OPTION_hdc
,
91 "-hdc/-hdd file use 'file' as IDE hard disk 2/3 image\n")
92 DEF("hdd", HAS_ARG
, QEMU_OPTION_hdd
, "")
102 Use @
var{file
} as hard disk
0, 1, 2 or
3 image (@pxref
{disk_images
}).
105 DEF("cdrom", HAS_ARG
, QEMU_OPTION_cdrom
,
106 "-cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)\n")
108 @item
-cdrom @
var{file
}
110 Use @
var{file
} as CD
-ROM
image (you cannot use @option
{-hdc
} and
111 @option
{-cdrom
} at the same time
). You can use the host CD
-ROM by
112 using @file
{/dev
/cdrom
} as
filename (@pxref
{host_drives
}).
115 DEF("drive", HAS_ARG
, QEMU_OPTION_drive
,
116 "-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]\n"
117 " [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]\n"
118 " [,cache=writethrough|writeback|none][,format=f][,serial=s]\n"
119 " [,addr=A][,id=name][,aio=threads|native][,readonly=on|off]\n"
121 " use 'file' as a drive image\n")
123 @item
-drive @
var{option
}[,@
var{option
}[,@
var{option
}[,...]]]
126 Define a
new drive
. Valid options are
:
129 @item file
=@
var{file
}
130 This option defines which disk
image (@pxref
{disk_images
}) to use with
131 this drive
. If the filename contains comma
, you must double it
132 (for instance
, "file=my,,file" to use file
"my,file").
133 @item
if=@
var{interface}
134 This option defines on which type on
interface the drive is connected
.
135 Available types are
: ide
, scsi
, sd
, mtd
, floppy
, pflash
, virtio
.
136 @item bus
=@
var{bus
},unit
=@
var{unit
}
137 These options define where is connected the drive by defining the bus number and
139 @item index
=@
var{index
}
140 This option defines where is connected the drive by
using an index
in the list
141 of available connectors of a given
interface type
.
142 @item media
=@
var{media
}
143 This option defines the type of the media
: disk or cdrom
.
144 @item cyls
=@
var{c
},heads
=@
var{h
},secs
=@
var{s
}[,trans
=@
var{t
}]
145 These options have the same definition as they have
in @option
{-hdachs
}.
146 @item snapshot
=@
var{snapshot
}
147 @
var{snapshot
} is
"on" or
"off" and allows to enable snapshot
for given
drive (see @option
{-snapshot
}).
148 @item cache
=@
var{cache
}
149 @
var{cache
} is
"none", "writeback", or
"writethrough" and controls how the host cache is used to access block data
.
151 @
var{aio
} is
"threads", or
"native" and selects between pthread based disk I
/O and native Linux AIO
.
152 @item format
=@
var{format
}
153 Specify which disk @
var{format
} will be used rather than detecting
154 the format
. Can be used to specifiy format
=raw to avoid interpreting
155 an untrusted format header
.
156 @item serial
=@
var{serial
}
157 This option specifies the serial number to assign to the device
.
158 @item addr
=@
var{addr
}
159 Specify the controller
's PCI address (if=virtio only).
162 By default, writethrough caching is used for all block device. This means that
163 the host page cache will be used to read and write data but write notification
164 will be sent to the guest only when the data has been reported as written by
165 the storage subsystem.
167 Writeback caching will report data writes as completed as soon as the data is
168 present in the host page cache. This is safe as long as you trust your host.
169 If your host crashes or loses power, then the guest may experience data
170 corruption. When using the @option{-snapshot} option, writeback caching is
173 The host page cache can be avoided entirely with @option{cache=none}. This will
174 attempt to do disk IO directly to the guests memory. QEMU may still perform
175 an internal copy of the data.
177 Some block drivers perform badly with @option{cache=writethrough}, most notably,
178 qcow2. If performance is more important than correctness,
179 @option{cache=writeback} should be used with qcow2.
181 Instead of @option{-cdrom} you can use:
183 qemu -drive file=file,index=2,media=cdrom
186 Instead of @option{-hda}, @option{-hdb}, @option{-hdc}, @option{-hdd}, you can
189 qemu -drive file=file,index=0,media=disk
190 qemu -drive file=file,index=1,media=disk
191 qemu -drive file=file,index=2,media=disk
192 qemu -drive file=file,index=3,media=disk
195 You can connect a CDROM to the slave of ide0:
197 qemu -drive file=file,if=ide,index=1,media=cdrom
200 If you don't specify the
"file=" argument
, you define an empty drive
:
202 qemu
-drive
if=ide
,index
=1,media
=cdrom
205 You can connect a SCSI disk with unit ID
6 on the bus #
0:
207 qemu
-drive file
=file
,if=scsi
,bus
=0,unit
=6
210 Instead of @option
{-fda
}, @option
{-fdb
}, you can use
:
212 qemu
-drive file
=file
,index
=0,if=floppy
213 qemu
-drive file
=file
,index
=1,if=floppy
216 By
default, @
var{interface} is
"ide" and @
var{index
} is automatically
219 qemu
-drive file
=a
-drive file
=b
"
227 DEF("set
", HAS_ARG, QEMU_OPTION_set,
228 "-set group
.id
.arg
=value
\n"
229 " set
<arg
> parameter
for item
<id
> of type
<group
>\n"
230 " i
.e
. -set drive
.$id
.file
=/path
/to
/image
\n")
237 DEF("global
", HAS_ARG, QEMU_OPTION_global,
238 "-global driver
.property
=value
\n"
239 " set a global
default for a driver property
\n")
246 DEF("mtdblock
", HAS_ARG, QEMU_OPTION_mtdblock,
247 "-mtdblock file use
'file' as on
-board Flash memory image
\n")
249 @item -mtdblock @var{file}
251 Use @var{file} as on-board Flash memory image.
254 DEF("sd
", HAS_ARG, QEMU_OPTION_sd,
255 "-sd file use
'file' as SecureDigital card image
\n")
259 Use @var{file} as SecureDigital card image.
262 DEF("pflash
", HAS_ARG, QEMU_OPTION_pflash,
263 "-pflash file use
'file' as a parallel flash image
\n")
265 @item -pflash @var{file}
267 Use @var{file} as a parallel flash image.
270 DEF("boot
", HAS_ARG, QEMU_OPTION_boot,
271 "-boot
[order
=drives
][,once
=drives
][,menu
=on|off
]\n"
272 " 'drives': floppy (a
), hard
disk (c
), CD
-ROM (d
), network (n
)\n")
274 @item -boot [order=@var{drives}][,once=@var{drives}][,menu=on|off]
276 Specify boot order @var{drives} as a string of drive letters. Valid
277 drive letters depend on the target achitecture. The x86 PC uses: a, b
278 (floppy 1 and 2), c (first hard disk), d (first CD-ROM), n-p (Etherboot
279 from network adapter 1-4), hard disk boot is the default. To apply a
280 particular boot order only on the first startup, specify it via
283 Interactive boot menus/prompts can be enabled via @option{menu=on} as far
284 as firmware/BIOS supports them. The default is non-interactive boot.
287 # try to boot from network first, then from hard disk
289 # boot from CD-ROM first, switch back to default order after reboot
293 Note: The legacy format '-boot @var{drives}' is still supported but its
294 use is discouraged as it may be removed from future versions.
297 DEF("snapshot
", 0, QEMU_OPTION_snapshot,
298 "-snapshot write to temporary files instead of disk image files
\n")
302 Write to temporary files instead of disk image files. In this case,
303 the raw disk image you use is not written back. You can however force
304 the write back by pressing @key{C-a s} (@pxref{disk_images}).
307 DEF("m
", HAS_ARG, QEMU_OPTION_m,
308 "-m megs set virtual RAM size to megs MB
[default="
309 stringify(DEFAULT_RAM_SIZE) "]\n")
313 Set virtual RAM size to @var{megs} megabytes. Default is 128 MiB. Optionally,
314 a suffix of ``M'' or ``G'' can be used to signify a value in megabytes or
315 gigabytes respectively.
318 DEF("mem
-path
", HAS_ARG, QEMU_OPTION_mempath,
319 "-mem
-path FILE provide backing storage
for guest RAM
\n")
321 @item -mem-path @var{path}
322 Allocate guest RAM from a temporarily created file in @var{path}.
326 DEF("mem
-prealloc
", 0, QEMU_OPTION_mem_prealloc,
327 "-mem
-prealloc preallocate guest
memory (use with
-mem
-path
)\n")
330 Preallocate memory when using -mem-path.
334 DEF("k
", HAS_ARG, QEMU_OPTION_k,
335 "-k language use keyboard
layout (for example
'fr' for French
)\n")
337 @item -k @var{language}
339 Use keyboard layout @var{language} (for example @code{fr} for
340 French). This option is only needed where it is not easy to get raw PC
341 keycodes (e.g. on Macs, with some X11 servers or with a VNC
342 display). You don't normally need to use it on PC/Linux or PC/Windows
345 The available layouts are:
347 ar de-ch es fo fr-ca hu ja mk no pt-br sv
348 da en-gb et fr fr-ch is lt nl pl ru th
349 de en-us fi fr-be hr it lv nl-be pt sl tr
352 The default is @code{en-us}.
357 DEF("audio
-help
", 0, QEMU_OPTION_audio_help,
358 "-audio
-help print list of audio drivers and their options
\n")
363 Will show the audio subsystem help: list of drivers, tunable
368 DEF("soundhw
", HAS_ARG, QEMU_OPTION_soundhw,
369 "-soundhw c1
,... enable audio support
\n"
370 " and only specified sound
cards (comma separated list
)\n"
371 " use
-soundhw ? to get the list of supported cards
\n"
372 " use
-soundhw all to enable all of them
\n")
375 @item -soundhw @var{card1}[,@var{card2},...] or -soundhw all
377 Enable audio and selected sound hardware. Use ? to print all
378 available sound hardware.
381 qemu -soundhw sb16,adlib disk.img
382 qemu -soundhw es1370 disk.img
383 qemu -soundhw ac97 disk.img
384 qemu -soundhw all disk.img
388 Note that Linux's i810_audio OSS kernel (for AC97) module might
389 require manually specifying clocking.
392 modprobe i810_audio clocking=48000
400 DEF("usb
", 0, QEMU_OPTION_usb,
401 "-usb enable the USB
driver (will be the
default soon
)\n")
408 Enable the USB driver (will be the default soon)
411 DEF("usbdevice
", HAS_ARG, QEMU_OPTION_usbdevice,
412 "-usbdevice name add the host or guest USB device
'name'\n")
415 @item -usbdevice @var{devname}
417 Add the USB device @var{devname}. @xref{usb_devices}.
422 Virtual Mouse. This will override the PS/2 mouse emulation when activated.
425 Pointer device that uses absolute coordinates (like a touchscreen). This
426 means qemu is able to report the mouse position without having to grab the
427 mouse. Also overrides the PS/2 mouse emulation when activated.
429 @item disk:[format=@var{format}]:@var{file}
430 Mass storage device based on file. The optional @var{format} argument
431 will be used rather than detecting the format. Can be used to specifiy
432 @code{format=raw} to avoid interpreting an untrusted format header.
434 @item host:@var{bus}.@var{addr}
435 Pass through the host device identified by @var{bus}.@var{addr} (Linux only).
437 @item host:@var{vendor_id}:@var{product_id}
438 Pass through the host device identified by @var{vendor_id}:@var{product_id}
441 @item serial:[vendorid=@var{vendor_id}][,productid=@var{product_id}]:@var{dev}
442 Serial converter to host character device @var{dev}, see @code{-serial} for the
446 Braille device. This will use BrlAPI to display the braille output on a real
449 @item net:@var{options}
450 Network adapter that supports CDC ethernet and RNDIS protocols.
455 DEF("device
", HAS_ARG, QEMU_OPTION_device,
456 "-device driver
[,prop
[=value
][,...]]\n"
457 " add
device (based on driver
)\n"
458 " prop
=value
,... sets driver properties
\n"
459 " use
-device ? to print all possible drivers
\n"
460 " use
-device driver
,? to print all possible options
\n"
461 " use
-device driver
,option
=? to print a help
for value
\n")
463 @item -device @var{driver}[,@var{option}[=@var{value}][,...]]
465 Add device @var{driver}. Depending on the device type,
466 @var{option} (with default or given @var{value}) may be useful.
467 To get a help on possible @var{driver}s, @var{option}s or @var{value}s, use
469 @code{-device @var{driver},?} or
470 @code{-device @var{driver},@var{option}=?}.
473 DEF("name
", HAS_ARG, QEMU_OPTION_name,
474 "-name string1
[,process
=string2
]\n"
475 " set the name of the guest
\n"
476 " string1 sets the window title and string2 the process
name (on Linux
)\n")
478 @item -name @var{name}
480 Sets the @var{name} of the guest.
481 This name will be displayed in the SDL window caption.
482 The @var{name} will also be used for the VNC server.
483 Also optionally set the top visible process name in Linux.
486 DEF("uuid
", HAS_ARG, QEMU_OPTION_uuid,
487 "-uuid
%08x
-%04x
-%04x
-%04x
-%012x
\n"
488 " specify machine UUID
\n")
490 @item -uuid @var{uuid}
501 DEFHEADING(Display options:)
507 DEF("nographic
", 0, QEMU_OPTION_nographic,
508 "-nographic disable graphical output and redirect serial I
/Os to console
\n")
512 Normally, QEMU uses SDL to display the VGA output. With this option,
513 you can totally disable graphical output so that QEMU is a simple
514 command line application. The emulated serial port is redirected on
515 the console. Therefore, you can still use QEMU to debug a Linux kernel
516 with a serial console.
520 DEF("curses
", 0, QEMU_OPTION_curses,
521 "-curses use a curses
/ncurses
interface instead of SDL
\n")
526 Normally, QEMU uses SDL to display the VGA output. With this option,
527 QEMU can display the VGA output when in text mode using a
528 curses/ncurses interface. Nothing is displayed in graphical mode.
532 DEF("no
-frame
", 0, QEMU_OPTION_no_frame,
533 "-no
-frame open SDL window without a frame and window decorations
\n")
538 Do not use decorations for SDL windows and start them using the whole
539 available screen space. This makes the using QEMU in a dedicated desktop
540 workspace more convenient.
544 DEF("alt
-grab
", 0, QEMU_OPTION_alt_grab,
545 "-alt
-grab use Ctrl
-Alt
-Shift to grab
mouse (instead of Ctrl
-Alt
)\n")
550 Use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt).
554 DEF("ctrl
-grab
", 0, QEMU_OPTION_ctrl_grab,
555 "-ctrl
-grab use Right
-Ctrl to grab
mouse (instead of Ctrl
-Alt
)\n")
560 Use Right-Ctrl to grab mouse (instead of Ctrl-Alt).
564 DEF("no
-quit
", 0, QEMU_OPTION_no_quit,
565 "-no
-quit disable SDL window close capability
\n")
570 Disable SDL window close capability.
574 DEF("sdl
", 0, QEMU_OPTION_sdl,
583 DEF("portrait
", 0, QEMU_OPTION_portrait,
584 "-portrait rotate graphical output
90 deg
left (only PXA LCD
)\n")
588 Rotate graphical output 90 deg left (only PXA LCD).
591 DEF("vga
", HAS_ARG, QEMU_OPTION_vga,
592 "-vga
[std|cirrus|vmware|xenfb|none
]\n"
593 " select video card type
\n")
595 @item -vga @var{type}
597 Select type of VGA card to emulate. Valid values for @var{type} are
600 Cirrus Logic GD5446 Video card. All Windows versions starting from
601 Windows 95 should recognize and use this graphic card. For optimal
602 performances, use 16 bit color depth in the guest and the host OS.
603 (This one is the default)
605 Standard VGA card with Bochs VBE extensions. If your guest OS
606 supports the VESA 2.0 VBE extensions (e.g. Windows XP) and if you want
607 to use high resolution modes (>= 1280x1024x16) then you should use
610 VMWare SVGA-II compatible adapter. Use it if you have sufficiently
611 recent XFree86/XOrg server or Windows guest with a driver for this
618 DEF("full
-screen
", 0, QEMU_OPTION_full_screen,
619 "-full
-screen start
in full screen
\n")
623 Start in full screen.
626 #if defined(TARGET_PPC) || defined(TARGET_SPARC)
627 DEF("g
", 1, QEMU_OPTION_g ,
628 "-g WxH
[xDEPTH
] Set the initial graphical resolution and depth
\n")
631 @item -g @var{width}x@var{height}[x@var{depth}]
633 Set the initial graphical resolution and depth (PPC, SPARC only).
636 DEF("vnc
", HAS_ARG, QEMU_OPTION_vnc ,
637 "-vnc display start a VNC server on display
\n")
639 @item -vnc @var{display}[,@var{option}[,@var{option}[,...]]]
641 Normally, QEMU uses SDL to display the VGA output. With this option,
642 you can have QEMU listen on VNC display @var{display} and redirect the VGA
643 display over the VNC session. It is very useful to enable the usb
644 tablet device when using this option (option @option{-usbdevice
645 tablet}). When using the VNC display, you must use the @option{-k}
646 parameter to set the keyboard layout if you are not using en-us. Valid
647 syntax for the @var{display} is
651 @item @var{host}:@var{d}
653 TCP connections will only be allowed from @var{host} on display @var{d}.
654 By convention the TCP port is 5900+@var{d}. Optionally, @var{host} can
655 be omitted in which case the server will accept connections from any host.
657 @item unix:@var{path}
659 Connections will be allowed over UNIX domain sockets where @var{path} is the
660 location of a unix socket to listen for connections on.
664 VNC is initialized but not started. The monitor @code{change} command
665 can be used to later start the VNC server.
669 Following the @var{display} value there may be one or more @var{option} flags
670 separated by commas. Valid options are
676 Connect to a listening VNC client via a ``reverse'' connection. The
677 client is specified by the @var{display}. For reverse network
678 connections (@var{host}:@var{d},@code{reverse}), the @var{d} argument
679 is a TCP port number, not a display number.
683 Require that password based authentication is used for client connections.
684 The password must be set separately using the @code{change} command in the
689 Require that client use TLS when communicating with the VNC server. This
690 uses anonymous TLS credentials so is susceptible to a man-in-the-middle
691 attack. It is recommended that this option be combined with either the
692 @option{x509} or @option{x509verify} options.
694 @item x509=@var{/path/to/certificate/dir}
696 Valid if @option{tls} is specified. Require that x509 credentials are used
697 for negotiating the TLS session. The server will send its x509 certificate
698 to the client. It is recommended that a password be set on the VNC server
699 to provide authentication of the client when this is used. The path following
700 this option specifies where the x509 certificates are to be loaded from.
701 See the @ref{vnc_security} section for details on generating certificates.
703 @item x509verify=@var{/path/to/certificate/dir}
705 Valid if @option{tls} is specified. Require that x509 credentials are used
706 for negotiating the TLS session. The server will send its x509 certificate
707 to the client, and request that the client send its own x509 certificate.
708 The server will validate the client's certificate against the CA certificate,
709 and reject clients when validation fails. If the certificate authority is
710 trusted, this is a sufficient authentication mechanism. You may still wish
711 to set a password on the VNC server as a second authentication layer. The
712 path following this option specifies where the x509 certificates are to
713 be loaded from. See the @ref{vnc_security} section for details on generating
718 Require that the client use SASL to authenticate with the VNC server.
719 The exact choice of authentication method used is controlled from the
720 system / user's SASL configuration file for the 'qemu' service. This
721 is typically found in /etc/sasl2/qemu.conf. If running QEMU as an
722 unprivileged user, an environment variable SASL_CONF_PATH can be used
723 to make it search alternate locations for the service config.
724 While some SASL auth methods can also provide data encryption (eg GSSAPI),
725 it is recommended that SASL always be combined with the 'tls' and
726 'x509' settings to enable use of SSL and server certificates. This
727 ensures a data encryption preventing compromise of authentication
728 credentials. See the @ref{vnc_security} section for details on using
733 Turn on access control lists for checking of the x509 client certificate
734 and SASL party. For x509 certs, the ACL check is made against the
735 certificate's distinguished name. This is something that looks like
736 @code{C=GB,O=ACME,L=Boston,CN=bob}. For SASL party, the ACL check is
737 made against the username, which depending on the SASL plugin, may
738 include a realm component, eg @code{bob} or @code{bob@@EXAMPLE.COM}.
739 When the @option{acl} flag is set, the initial access list will be
740 empty, with a @code{deny} policy. Thus no one will be allowed to
741 use the VNC server until the ACLs have been loaded. This can be
742 achieved using the @code{acl} monitor command.
754 DEFHEADING(i386 target only:)
761 DEF("win2k
-hack
", 0, QEMU_OPTION_win2k_hack,
762 "-win2k
-hack use it when installing Windows
2000 to avoid a disk full bug
\n")
767 Use it when installing Windows 2000 to avoid a disk full bug. After
768 Windows 2000 is installed, you no longer need this option (this option
769 slows down the IDE transfers).
773 HXCOMM Deprecated by -rtc
774 DEF("rtc
-td
-hack
", 0, QEMU_OPTION_rtc_td_hack, "")
778 DEF("no
-fd
-bootchk
", 0, QEMU_OPTION_no_fd_bootchk,
779 "-no
-fd
-bootchk disable boot signature checking
for floppy disks
\n")
783 @findex -no-fd-bootchk
784 Disable boot signature checking for floppy disks in Bochs BIOS. It may
785 be needed to boot from old floppy disks.
786 TODO: check reference to Bochs BIOS.
790 DEF("no
-acpi
", 0, QEMU_OPTION_no_acpi,
791 "-no
-acpi disable ACPI
\n")
796 Disable ACPI (Advanced Configuration and Power Interface) support. Use
797 it if your guest OS complains about ACPI problems (PC target machine
802 DEF("no
-hpet
", 0, QEMU_OPTION_no_hpet,
803 "-no
-hpet disable HPET
\n")
808 Disable HPET support.
812 DEF("balloon
", HAS_ARG, QEMU_OPTION_balloon,
813 "-balloon none disable balloon device
\n"
814 "-balloon virtio
[,addr
=str
]\n"
815 " enable virtio balloon
device (default)\n")
820 Disable balloon device.
821 @item -balloon virtio[,addr=@var{addr}]
822 Enable virtio balloon device (default), optionally with PCI address
827 DEF("acpitable
", HAS_ARG, QEMU_OPTION_acpitable,
828 "-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"
829 " ACPI table description
\n")
832 @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}]...]
834 Add ACPI table with specified header fields and context from specified files.
838 DEF("smbios
", HAS_ARG, QEMU_OPTION_smbios,
839 "-smbios file
=binary
\n"
840 " load SMBIOS entry from binary file
\n"
841 "-smbios type
=0[,vendor
=str
][,version
=str
][,date
=str
][,release
=%d
.%d
]\n"
842 " specify SMBIOS type
0 fields
\n"
843 "-smbios type
=1[,manufacturer
=str
][,product
=str
][,version
=str
][,serial
=str
]\n"
844 " [,uuid
=uuid
][,sku
=str
][,family
=str
]\n"
845 " specify SMBIOS type
1 fields
\n")
848 @item -smbios file=@var{binary}
850 Load SMBIOS entry from binary file.
852 @item -smbios type=0[,vendor=@var{str}][,version=@var{str}][,date=@var{str}][,release=@var{%d.%d}]
854 Specify SMBIOS type 0 fields
856 @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}]
857 Specify SMBIOS type 1 fields
867 DEFHEADING(Network options:)
872 HXCOMM Legacy slirp options (now moved to -net user):
874 DEF("tftp
", HAS_ARG, QEMU_OPTION_tftp, "")
875 DEF("bootp
", HAS_ARG, QEMU_OPTION_bootp, "")
876 DEF("redir
", HAS_ARG, QEMU_OPTION_redir, "")
878 DEF("smb
", HAS_ARG, QEMU_OPTION_smb, "")
882 DEF("net
", HAS_ARG, QEMU_OPTION_net,
883 "-net nic
[,vlan
=n
][,macaddr
=mac
][,model
=type
][,name
=str
][,addr
=str
][,vectors
=v
]\n"
884 " create a
new Network Interface Card and connect it to VLAN
'n'\n"
886 "-net user
[,vlan
=n
][,name
=str
][,net
=addr
[/mask
]][,host
=addr
][,restrict
=y|n
]\n"
887 " [,hostname
=host
][,dhcpstart
=addr
][,dns
=addr
][,tftp
=dir
][,bootfile
=f
]\n"
888 " [,hostfwd
=rule
][,guestfwd
=rule
]"
890 "[,smb
=dir
[,smbserver
=addr
]]\n"
892 " connect the user mode network stack to VLAN
'n', configure its
\n"
893 " DHCP server and enabled optional services
\n"
896 "-net tap
[,vlan
=n
][,name
=str
],ifname
=name
\n"
897 " connect the host TAP network
interface to VLAN
'n'\n"
899 "-net tap
[,vlan
=n
][,name
=str
][,fd
=h
][,ifname
=name
][,script
=file
][,downscript
=dfile
][,sndbuf
=nbytes
][,vnet_hdr
=on|off
]\n"
900 " connect the host TAP network
interface to VLAN
'n' and use the
\n"
901 " network scripts
'file' (default=" DEFAULT_NETWORK_SCRIPT ")\n"
902 " and
'dfile' (default=" DEFAULT_NETWORK_DOWN_SCRIPT ")\n"
903 " use
'[down]script=no' to disable script execution
\n"
904 " use
'fd=h' to connect to an already opened TAP
interface\n"
905 " use
'sndbuf=nbytes' to limit the size of the send
buffer (the
\n"
906 " default of
'sndbuf=1048576' can be disabled
using 'sndbuf=0')\n"
907 " use vnet_hdr
=off to avoid enabling the IFF_VNET_HDR tap flag
\n"
908 " use vnet_hdr
=on to make the lack of IFF_VNET_HDR support an error condition
\n"
910 "-net socket
[,vlan
=n
][,name
=str
][,fd
=h
][,listen
=[host
]:port
][,connect
=host
:port
]\n"
911 " connect the vlan
'n' to another VLAN
using a socket connection
\n"
912 "-net socket
[,vlan
=n
][,name
=str
][,fd
=h
][,mcast
=maddr
:port
]\n"
913 " connect the vlan
'n' to multicast maddr and port
\n"
915 "-net vde
[,vlan
=n
][,name
=str
][,sock
=socketpath
][,port
=n
][,group
=groupname
][,mode
=octalmode
]\n"
916 " connect the vlan
'n' to port
'n' of a vde
switch running
\n"
917 " on host and listening
for incoming connections on
'socketpath'.\n"
918 " Use group
'groupname' and mode
'octalmode' to change
default\n"
919 " ownership and permissions
for communication port
.\n"
921 "-net dump
[,vlan
=n
][,file
=f
][,len
=n
]\n"
922 " dump traffic on vlan
'n' to file
'f' (max n bytes per packet
)\n"
923 "-net none use it alone to have zero network devices
. If no
-net option
\n"
924 " is provided
, the
default is
'-net nic -net user'\n")
925 DEF("netdev
", HAS_ARG, QEMU_OPTION_netdev,
934 "socket
],id
=str
[,option
][,option
][,...]\n")
936 @item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}][,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
938 Create a new Network Interface Card and connect it to VLAN @var{n} (@var{n}
939 = 0 is the default). The NIC is an e1000 by default on the PC
940 target. Optionally, the MAC address can be changed to @var{mac}, the
941 device address set to @var{addr} (PCI cards only),
942 and a @var{name} can be assigned for use in monitor commands.
943 Optionally, for PCI cards, you can specify the number @var{v} of MSI-X vectors
944 that the card should have; this option currently only affects virtio cards; set
945 @var{v} = 0 to disable MSI-X. If no @option{-net} option is specified, a single
946 NIC is created. Qemu can emulate several different models of network card.
947 Valid values for @var{type} are
948 @code{virtio}, @code{i82551}, @code{i82557b}, @code{i82559er},
949 @code{ne2k_pci}, @code{ne2k_isa}, @code{pcnet}, @code{rtl8139},
950 @code{e1000}, @code{smc91c111}, @code{lance} and @code{mcf_fec}.
951 Not all devices are supported on all targets. Use -net nic,model=?
952 for a list of available devices for your target.
954 @item -net user[,@var{option}][,@var{option}][,...]
955 Use the user mode network stack which requires no administrator
956 privilege to run. Valid options are:
960 Connect user mode stack to VLAN @var{n} (@var{n} = 0 is the default).
962 @item name=@var{name}
963 Assign symbolic name for use in monitor commands.
965 @item net=@var{addr}[/@var{mask}]
966 Set IP network address the guest will see. Optionally specify the netmask,
967 either in the form a.b.c.d or as number of valid top-most bits. Default is
970 @item host=@var{addr}
971 Specify the guest-visible address of the host. Default is the 2nd IP in the
972 guest network, i.e. x.x.x.2.
974 @item restrict=y|yes|n|no
975 If this options is enabled, the guest will be isolated, i.e. it will not be
976 able to contact the host and no guest IP packets will be routed over the host
977 to the outside. This option does not affect explicitly set forwarding rule.
979 @item hostname=@var{name}
980 Specifies the client hostname reported by the builtin DHCP server.
982 @item dhcpstart=@var{addr}
983 Specify the first of the 16 IPs the built-in DHCP server can assign. Default
984 is the 16th to 31st IP in the guest network, i.e. x.x.x.16 to x.x.x.31.
987 Specify the guest-visible address of the virtual nameserver. The address must
988 be different from the host address. Default is the 3rd IP in the guest network,
992 When using the user mode network stack, activate a built-in TFTP
993 server. The files in @var{dir} will be exposed as the root of a TFTP server.
994 The TFTP client on the guest must be configured in binary mode (use the command
995 @code{bin} of the Unix TFTP client).
997 @item bootfile=@var{file}
998 When using the user mode network stack, broadcast @var{file} as the BOOTP
999 filename. In conjunction with @option{tftp}, this can be used to network boot
1000 a guest from a local directory.
1002 Example (using pxelinux):
1004 qemu -hda linux.img -boot n -net user,tftp=/path/to/tftp/files,bootfile=/pxelinux.0
1007 @item smb=@var{dir}[,smbserver=@var{addr}]
1008 When using the user mode network stack, activate a built-in SMB
1009 server so that Windows OSes can access to the host files in @file{@var{dir}}
1010 transparently. The IP address of the SMB server can be set to @var{addr}. By
1011 default the 4th IP in the guest network is used, i.e. x.x.x.4.
1013 In the guest Windows OS, the line:
1017 must be added in the file @file{C:\WINDOWS\LMHOSTS} (for windows 9x/Me)
1018 or @file{C:\WINNT\SYSTEM32\DRIVERS\ETC\LMHOSTS} (Windows NT/2000).
1020 Then @file{@var{dir}} can be accessed in @file{\\smbserver\qemu}.
1022 Note that a SAMBA server must be installed on the host OS in
1023 @file{/usr/sbin/smbd}. QEMU was tested successfully with smbd versions from
1024 Red Hat 9, Fedora Core 3 and OpenSUSE 11.x.
1026 @item hostfwd=[tcp|udp]:[@var{hostaddr}]:@var{hostport}-[@var{guestaddr}]:@var{guestport}
1027 Redirect incoming TCP or UDP connections to the host port @var{hostport} to
1028 the guest IP address @var{guestaddr} on guest port @var{guestport}. If
1029 @var{guestaddr} is not specified, its value is x.x.x.15 (default first address
1030 given by the built-in DHCP server). By specifying @var{hostaddr}, the rule can
1031 be bound to a specific host interface. If no connection type is set, TCP is
1032 used. This option can be given multiple times.
1034 For example, to redirect host X11 connection from screen 1 to guest
1035 screen 0, use the following:
1039 qemu -net user,hostfwd=tcp:127.0.0.1:6001-:6000 [...]
1040 # this host xterm should open in the guest X11 server
1044 To redirect telnet connections from host port 5555 to telnet port on
1045 the guest, use the following:
1049 qemu -net user,hostfwd=tcp::5555-:23 [...]
1050 telnet localhost 5555
1053 Then when you use on the host @code{telnet localhost 5555}, you
1054 connect to the guest telnet server.
1056 @item guestfwd=[tcp]:@var{server}:@var{port}-@var{dev}
1057 Forward guest TCP connections to the IP address @var{server} on port @var{port}
1058 to the character device @var{dev}. This option can be given multiple times.
1062 Note: Legacy stand-alone options -tftp, -bootp, -smb and -redir are still
1063 processed and applied to -net user. Mixing them with the new configuration
1064 syntax gives undefined results. Their use for new applications is discouraged
1065 as they will be removed from future versions.
1067 @item -net tap[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,ifname=@var{name}][,script=@var{file}][,downscript=@var{dfile}]
1068 Connect the host TAP network interface @var{name} to VLAN @var{n}, use
1069 the network script @var{file} to configure it and the network script
1070 @var{dfile} to deconfigure it. If @var{name} is not provided, the OS
1071 automatically provides one. @option{fd}=@var{h} can be used to specify
1072 the handle of an already opened host TAP interface. The default network
1073 configure script is @file{/etc/qemu-ifup} and the default network
1074 deconfigure script is @file{/etc/qemu-ifdown}. Use @option{script=no}
1075 or @option{downscript=no} to disable script execution. Example:
1078 qemu linux.img -net nic -net tap
1081 More complicated example (two NICs, each one connected to a TAP device)
1083 qemu linux.img -net nic,vlan=0 -net tap,vlan=0,ifname=tap0 \
1084 -net nic,vlan=1 -net tap,vlan=1,ifname=tap1
1087 @item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,listen=[@var{host}]:@var{port}][,connect=@var{host}:@var{port}]
1089 Connect the VLAN @var{n} to a remote VLAN in another QEMU virtual
1090 machine using a TCP socket connection. If @option{listen} is
1091 specified, QEMU waits for incoming connections on @var{port}
1092 (@var{host} is optional). @option{connect} is used to connect to
1093 another QEMU instance using the @option{listen} option. @option{fd}=@var{h}
1094 specifies an already opened TCP socket.
1098 # launch a first QEMU instance
1099 qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
1100 -net socket,listen=:1234
1101 # connect the VLAN 0 of this instance to the VLAN 0
1102 # of the first instance
1103 qemu linux.img -net nic,macaddr=52:54:00:12:34:57 \
1104 -net socket,connect=127.0.0.1:1234
1107 @item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,mcast=@var{maddr}:@var{port}]
1109 Create a VLAN @var{n} shared with another QEMU virtual
1110 machines using a UDP multicast socket, effectively making a bus for
1111 every QEMU with same multicast address @var{maddr} and @var{port}.
1115 Several QEMU can be running on different hosts and share same bus (assuming
1116 correct multicast setup for these hosts).
1118 mcast support is compatible with User Mode Linux (argument @option{eth@var{N}=mcast}), see
1119 @url{http://user-mode-linux.sf.net}.
1121 Use @option{fd=h} to specify an already opened UDP multicast socket.
1126 # launch one QEMU instance
1127 qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
1128 -net socket,mcast=230.0.0.1:1234
1129 # launch another QEMU instance on same "bus
"
1130 qemu linux.img -net nic,macaddr=52:54:00:12:34:57 \
1131 -net socket,mcast=230.0.0.1:1234
1132 # launch yet another QEMU instance on same "bus
"
1133 qemu linux.img -net nic,macaddr=52:54:00:12:34:58 \
1134 -net socket,mcast=230.0.0.1:1234
1137 Example (User Mode Linux compat.):
1139 # launch QEMU instance (note mcast address selected
1141 qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
1142 -net socket,mcast=239.192.168.1:1102
1144 /path/to/linux ubd0=/path/to/root_fs eth0=mcast
1147 @item -net vde[,vlan=@var{n}][,name=@var{name}][,sock=@var{socketpath}][,port=@var{n}][,group=@var{groupname}][,mode=@var{octalmode}]
1148 Connect VLAN @var{n} to PORT @var{n} of a vde switch running on host and
1149 listening for incoming connections on @var{socketpath}. Use GROUP @var{groupname}
1150 and MODE @var{octalmode} to change default ownership and permissions for
1151 communication port. This option is available only if QEMU has been compiled
1152 with vde support enabled.
1157 vde_switch -F -sock /tmp/myswitch
1158 # launch QEMU instance
1159 qemu linux.img -net nic -net vde,sock=/tmp/myswitch
1162 @item -net dump[,vlan=@var{n}][,file=@var{file}][,len=@var{len}]
1163 Dump network traffic on VLAN @var{n} to file @var{file} (@file{qemu-vlan0.pcap} by default).
1164 At most @var{len} bytes (64k by default) per packet are stored. The file format is
1165 libpcap, so it can be analyzed with tools such as tcpdump or Wireshark.
1168 Indicate that no network devices should be configured. It is used to
1169 override the default configuration (@option{-net nic -net user}) which
1170 is activated if no @option{-net} options are provided.
1177 DEFHEADING(Character device options:)
1179 DEF("chardev
", HAS_ARG, QEMU_OPTION_chardev,
1180 "-chardev
null,id
=id
\n"
1181 "-chardev socket
,id
=id
[,host
=host
],port
=host
[,to
=to
][,ipv4
][,ipv6
][,nodelay
]\n"
1182 " [,server
][,nowait
][,telnet
] (tcp
)\n"
1183 "-chardev socket
,id
=id
,path
=path
[,server
][,nowait
][,telnet
] (unix
)\n"
1184 "-chardev udp
,id
=id
[,host
=host
],port
=port
[,localaddr
=localaddr
]\n"
1185 " [,localport
=localport
][,ipv4
][,ipv6
]\n"
1186 "-chardev msmouse
,id
=id
\n"
1187 "-chardev vc
,id
=id
[[,width
=width
][,height
=height
]][[,cols
=cols
][,rows
=rows
]]\n"
1188 "-chardev file
,id
=id
,path
=path
\n"
1189 "-chardev pipe
,id
=id
,path
=path
\n"
1191 "-chardev console
,id
=id
\n"
1192 "-chardev serial
,id
=id
,path
=path
\n"
1194 "-chardev pty
,id
=id
\n"
1195 "-chardev stdio
,id
=id
\n"
1197 #ifdef CONFIG_BRLAPI
1198 "-chardev braille
,id
=id
\n"
1200 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
1201 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
1202 "-chardev tty
,id
=id
,path
=path
\n"
1204 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__)
1205 "-chardev parport
,id
=id
,path
=path
\n"
1211 The general form of a character device option is:
1214 @item -chardev @var{backend} ,id=@var{id} [,@var{options}]
1231 The specific backend will determine the applicable options.
1233 All devices must have an id, which can be any string up to 127 characters long.
1234 It is used to uniquely identify this device in other command line directives.
1236 Options to each backend are described below.
1238 @item -chardev null ,id=@var{id}
1239 A void device. This device will not emit any data, and will drop any data it
1240 receives. The null backend does not take any options.
1242 @item -chardev socket ,id=@var{id} [@var{TCP options} or @var{unix options}] [,server] [,nowait] [,telnet]
1244 Create a two-way stream socket, which can be either a TCP or a unix socket. A
1245 unix socket will be created if @option{path} is specified. Behaviour is
1246 undefined if TCP options are specified for a unix socket.
1248 @option{server} specifies that the socket shall be a listening socket.
1250 @option{nowait} specifies that QEMU should not block waiting for a client to
1251 connect to a listening socket.
1253 @option{telnet} specifies that traffic on the socket should interpret telnet
1256 TCP and unix socket options are given below:
1260 @item TCP options: port=@var{host} [,host=@var{host}] [,to=@var{to}] [,ipv4] [,ipv6] [,nodelay]
1262 @option{host} for a listening socket specifies the local address to be bound.
1263 For a connecting socket species the remote host to connect to. @option{host} is
1264 optional for listening sockets. If not specified it defaults to @code{0.0.0.0}.
1266 @option{port} for a listening socket specifies the local port to be bound. For a
1267 connecting socket specifies the port on the remote host to connect to.
1268 @option{port} can be given as either a port number or a service name.
1269 @option{port} is required.
1271 @option{to} is only relevant to listening sockets. If it is specified, and
1272 @option{port} cannot be bound, QEMU will attempt to bind to subsequent ports up
1273 to and including @option{to} until it succeeds. @option{to} must be specified
1276 @option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used.
1277 If neither is specified the socket may use either protocol.
1279 @option{nodelay} disables the Nagle algorithm.
1281 @item unix options: path=@var{path}
1283 @option{path} specifies the local path of the unix socket. @option{path} is
1288 @item -chardev udp ,id=@var{id} [,host=@var{host}] ,port=@var{port} [,localaddr=@var{localaddr}] [,localport=@var{localport}] [,ipv4] [,ipv6]
1290 Sends all traffic from the guest to a remote host over UDP.
1292 @option{host} specifies the remote host to connect to. If not specified it
1293 defaults to @code{localhost}.
1295 @option{port} specifies the port on the remote host to connect to. @option{port}
1298 @option{localaddr} specifies the local address to bind to. If not specified it
1299 defaults to @code{0.0.0.0}.
1301 @option{localport} specifies the local port to bind to. If not specified any
1302 available local port will be used.
1304 @option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used.
1305 If neither is specified the device may use either protocol.
1307 @item -chardev msmouse ,id=@var{id}
1309 Forward QEMU's emulated msmouse events to the guest. @option{msmouse} does not
1312 @item -chardev vc ,id=@var{id} [[,width=@var{width}] [,height=@var{height}]] [[,cols=@var{cols}] [,rows=@var{rows}]]
1314 Connect to a QEMU text console. @option{vc} may optionally be given a specific
1317 @option{width} and @option{height} specify the width and height respectively of
1318 the console, in pixels.
1320 @option{cols} and @option{rows} specify that the console be sized to fit a text
1321 console with the given dimensions.
1323 @item -chardev file ,id=@var{id} ,path=@var{path}
1325 Log all traffic received from the guest to a file.
1327 @option{path} specifies the path of the file to be opened. This file will be
1328 created if it does not already exist, and overwritten if it does. @option{path}
1331 @item -chardev pipe ,id=@var{id} ,path=@var{path}
1333 Create a two-way connection to the guest. The behaviour differs slightly between
1334 Windows hosts and other hosts:
1336 On Windows, a single duplex pipe will be created at
1337 @file{\\.pipe\@option{path}}.
1339 On other hosts, 2 pipes will be created called @file{@option{path}.in} and
1340 @file{@option{path}.out}. Data written to @file{@option{path}.in} will be
1341 received by the guest. Data written by the guest can be read from
1342 @file{@option{path}.out}. QEMU will not create these fifos, and requires them to
1345 @option{path} forms part of the pipe path as described above. @option{path} is
1348 @item -chardev console ,id=@var{id}
1350 Send traffic from the guest to QEMU's standard output. @option{console} does not
1353 @option{console} is only available on Windows hosts.
1355 @item -chardev serial ,id=@var{id} ,path=@option{path}
1357 Send traffic from the guest to a serial device on the host.
1360 only available on Windows hosts.
1362 @option{path} specifies the name of the serial device to open.
1364 @item -chardev pty ,id=@var{id}
1366 Create a new pseudo-terminal on the host and connect to it. @option{pty} does
1367 not take any options.
1369 @option{pty} is not available on Windows hosts.
1371 @item -chardev stdio ,id=@var{id}
1372 Connect to standard input and standard output of the qemu process.
1373 @option{stdio} does not take any options. @option{stdio} is not available on
1376 @item -chardev braille ,id=@var{id}
1378 Connect to a local BrlAPI server. @option{braille} does not take any options.
1380 @item -chardev tty ,id=@var{id} ,path=@var{path}
1382 Connect to a local tty device.
1384 @option{tty} is only available on Linux, Sun, FreeBSD, NetBSD, OpenBSD and
1387 @option{path} specifies the path to the tty. @option{path} is required.
1389 @item -chardev parport ,id=@var{id} ,path=@var{path}
1391 @option{parport} is only available on Linux, FreeBSD and DragonFlyBSD hosts.
1393 Connect to a local parallel port.
1395 @option{path} specifies the path to the parallel port device. @option{path} is
1403 DEFHEADING(Bluetooth(R) options:)
1405 DEF("bt
", HAS_ARG, QEMU_OPTION_bt, \
1406 "-bt hci
,null dumb bluetooth HCI
- doesn
't respond to commands\n" \
1407 "-bt hci,host[:id]\n" \
1408 " use host's HCI with the given name
\n" \
1409 "-bt hci
[,vlan
=n
]\n" \
1410 " emulate a standard HCI
in virtual scatternet
'n'\n" \
1411 "-bt vhci
[,vlan
=n
]\n" \
1412 " add host computer to virtual scatternet
'n' using VHCI
\n" \
1413 "-bt device
:dev
[,vlan
=n
]\n" \
1414 " emulate a bluetooth device
'dev' in scatternet
'n'\n")
1420 Defines the function of the corresponding Bluetooth HCI. -bt options
1421 are matched with the HCIs present in the chosen machine type. For
1422 example when emulating a machine with only one HCI built into it, only
1423 the first @code{-bt hci[...]} option is valid and defines the HCI's
1424 logic. The Transport Layer is decided by the machine type. Currently
1425 the machines @code{n800} and @code{n810} have one HCI and all other
1429 The following three types are recognized:
1433 (default) The corresponding Bluetooth HCI assumes no internal logic
1434 and will not respond to any HCI commands or emit events.
1436 @item -bt hci,host[:@var{id}]
1437 (@code{bluez} only) The corresponding HCI passes commands / events
1438 to / from the physical HCI identified by the name @var{id} (default:
1439 @code{hci0}) on the computer running QEMU. Only available on @code{bluez}
1440 capable systems like Linux.
1442 @item -bt hci[,vlan=@var{n}]
1443 Add a virtual, standard HCI that will participate in the Bluetooth
1444 scatternet @var{n} (default @code{0}). Similarly to @option{-net}
1445 VLANs, devices inside a bluetooth network @var{n} can only communicate
1446 with other devices in the same network (scatternet).
1449 @item -bt vhci[,vlan=@var{n}]
1450 (Linux-host only) Create a HCI in scatternet @var{n} (default 0) attached
1451 to the host bluetooth stack instead of to the emulated target. This
1452 allows the host and target machines to participate in a common scatternet
1453 and communicate. Requires the Linux @code{vhci} driver installed. Can
1454 be used as following:
1457 qemu [...OPTIONS...] -bt hci,vlan=5 -bt vhci,vlan=5
1460 @item -bt device:@var{dev}[,vlan=@var{n}]
1461 Emulate a bluetooth device @var{dev} and place it in network @var{n}
1462 (default @code{0}). QEMU can only emulate one type of bluetooth devices
1467 Virtual wireless keyboard implementing the HIDP bluetooth profile.
1474 DEFHEADING(Linux/Multiboot boot specific:)
1477 When using these options, you can use a given Linux or Multiboot
1478 kernel without installing it in the disk image. It can be useful
1479 for easier testing of various kernels.
1484 DEF("kernel
", HAS_ARG, QEMU_OPTION_kernel, \
1485 "-kernel bzImage use
'bzImage' as kernel image
\n")
1487 @item -kernel @var{bzImage}
1489 Use @var{bzImage} as kernel image. The kernel can be either a Linux kernel
1490 or in multiboot format.
1493 DEF("append
", HAS_ARG, QEMU_OPTION_append, \
1494 "-append cmdline use
'cmdline' as kernel command line
\n")
1496 @item -append @var{cmdline}
1498 Use @var{cmdline} as kernel command line
1501 DEF("initrd
", HAS_ARG, QEMU_OPTION_initrd, \
1502 "-initrd file use
'file' as initial ram disk
\n")
1504 @item -initrd @var{file}
1506 Use @var{file} as initial ram disk.
1508 @item -initrd "@
var{file1
} arg
=foo
,@
var{file2
}"
1510 This syntax is only available with multiboot.
1512 Use @var{file1} and @var{file2} as modules and pass arg=foo as parameter to the
1522 DEFHEADING(Debug/Expert options:)
1528 DEF("serial
", HAS_ARG, QEMU_OPTION_serial, \
1529 "-serial dev redirect the serial port to char device
'dev'\n")
1531 @item -serial @var{dev}
1533 Redirect the virtual serial port to host character device
1534 @var{dev}. The default device is @code{vc} in graphical mode and
1535 @code{stdio} in non graphical mode.
1537 This option can be used several times to simulate up to 4 serial
1540 Use @code{-serial none} to disable all serial ports.
1542 Available character devices are:
1544 @item vc[:@var{W}x@var{H}]
1545 Virtual console. Optionally, a width and height can be given in pixel with
1549 It is also possible to specify width or height in characters:
1554 [Linux only] Pseudo TTY (a new PTY is automatically allocated)
1556 No device is allocated.
1560 [Linux only] Use host tty, e.g. @file{/dev/ttyS0}. The host serial port
1561 parameters are set according to the emulated ones.
1562 @item /dev/parport@var{N}
1563 [Linux only, parallel port only] Use host parallel port
1564 @var{N}. Currently SPP and EPP parallel port features can be used.
1565 @item file:@var{filename}
1566 Write output to @var{filename}. No character can be read.
1568 [Unix only] standard input/output
1569 @item pipe:@var{filename}
1570 name pipe @var{filename}
1572 [Windows only] Use host serial port @var{n}
1573 @item udp:[@var{remote_host}]:@var{remote_port}[@@[@var{src_ip}]:@var{src_port}]
1574 This implements UDP Net Console.
1575 When @var{remote_host} or @var{src_ip} are not specified
1576 they default to @code{0.0.0.0}.
1577 When not using a specified @var{src_port} a random port is automatically chosen.
1579 If you just want a simple readonly console you can use @code{netcat} or
1580 @code{nc}, by starting qemu with: @code{-serial udp::4555} and nc as:
1581 @code{nc -u -l -p 4555}. Any time qemu writes something to that port it
1582 will appear in the netconsole session.
1584 If you plan to send characters back via netconsole or you want to stop
1585 and start qemu a lot of times, you should have qemu use the same
1586 source port each time by using something like @code{-serial
1587 udp::4555@@:4556} to qemu. Another approach is to use a patched
1588 version of netcat which can listen to a TCP port and send and receive
1589 characters via udp. If you have a patched version of netcat which
1590 activates telnet remote echo and single char transfer, then you can
1591 use the following options to step up a netcat redirector to allow
1592 telnet on port 5555 to access the qemu port.
1595 -serial udp::4555@@:4556
1596 @item netcat options:
1597 -u -P 4555 -L 0.0.0.0:4556 -t -p 5555 -I -T
1598 @item telnet options:
1602 @item tcp:[@var{host}]:@var{port}[,@var{server}][,nowait][,nodelay]
1603 The TCP Net Console has two modes of operation. It can send the serial
1604 I/O to a location or wait for a connection from a location. By default
1605 the TCP Net Console is sent to @var{host} at the @var{port}. If you use
1606 the @var{server} option QEMU will wait for a client socket application
1607 to connect to the port before continuing, unless the @code{nowait}
1608 option was specified. The @code{nodelay} option disables the Nagle buffering
1609 algorithm. If @var{host} is omitted, 0.0.0.0 is assumed. Only
1610 one TCP connection at a time is accepted. You can use @code{telnet} to
1611 connect to the corresponding character device.
1613 @item Example to send tcp console to 192.168.0.2 port 4444
1614 -serial tcp:192.168.0.2:4444
1615 @item Example to listen and wait on port 4444 for connection
1616 -serial tcp::4444,server
1617 @item Example to not wait and listen on ip 192.168.0.100 port 4444
1618 -serial tcp:192.168.0.100:4444,server,nowait
1621 @item telnet:@var{host}:@var{port}[,server][,nowait][,nodelay]
1622 The telnet protocol is used instead of raw tcp sockets. The options
1623 work the same as if you had specified @code{-serial tcp}. The
1624 difference is that the port acts like a telnet server or client using
1625 telnet option negotiation. This will also allow you to send the
1626 MAGIC_SYSRQ sequence if you use a telnet that supports sending the break
1627 sequence. Typically in unix telnet you do it with Control-] and then
1628 type "send
break" followed by pressing the enter key.
1630 @item unix:@var{path}[,server][,nowait]
1631 A unix domain socket is used instead of a tcp socket. The option works the
1632 same as if you had specified @code{-serial tcp} except the unix domain socket
1633 @var{path} is used for connections.
1635 @item mon:@var{dev_string}
1636 This is a special option to allow the monitor to be multiplexed onto
1637 another serial port. The monitor is accessed with key sequence of
1638 @key{Control-a} and then pressing @key{c}. See monitor access
1639 @ref{pcsys_keys} in the -nographic section for more keys.
1640 @var{dev_string} should be any one of the serial devices specified
1641 above. An example to multiplex the monitor onto a telnet server
1642 listening on port 4444 would be:
1644 @item -serial mon:telnet::4444,server,nowait
1648 Braille device. This will use BrlAPI to display the braille output on a real
1652 Three button serial mouse. Configure the guest to use Microsoft protocol.
1656 DEF("parallel
", HAS_ARG, QEMU_OPTION_parallel, \
1657 "-parallel dev redirect the parallel port to char device
'dev'\n")
1659 @item -parallel @var{dev}
1661 Redirect the virtual parallel port to host device @var{dev} (same
1662 devices as the serial port). On Linux hosts, @file{/dev/parportN} can
1663 be used to use hardware devices connected on the corresponding host
1666 This option can be used several times to simulate up to 3 parallel
1669 Use @code{-parallel none} to disable all parallel ports.
1672 DEF("monitor
", HAS_ARG, QEMU_OPTION_monitor, \
1673 "-monitor dev redirect the monitor to char device
'dev'\n")
1675 @item -monitor @var{dev}
1677 Redirect the monitor to host device @var{dev} (same devices as the
1679 The default device is @code{vc} in graphical mode and @code{stdio} in
1682 DEF("qmp
", HAS_ARG, QEMU_OPTION_qmp, \
1683 "-qmp dev like
-monitor but opens
in 'control' mode
\n")
1685 @item -qmp @var{dev}
1687 Like -monitor but opens in 'control' mode.
1690 DEF("mon
", HAS_ARG, QEMU_OPTION_mon, \
1691 "-mon chardev
=[name
][,mode
=readline|control
][,default]\n")
1693 @item -mon chardev=[name][,mode=readline|control][,default]
1695 Setup monitor on chardev @var{name}.
1698 DEF("debugcon
", HAS_ARG, QEMU_OPTION_debugcon, \
1699 "-debugcon dev redirect the debug console to char device
'dev'\n")
1701 @item -debugcon @var{dev}
1703 Redirect the debug console to host device @var{dev} (same devices as the
1704 serial port). The debug console is an I/O port which is typically port
1705 0xe9; writing to that I/O port sends output to this device.
1706 The default device is @code{vc} in graphical mode and @code{stdio} in
1710 DEF("pidfile
", HAS_ARG, QEMU_OPTION_pidfile, \
1711 "-pidfile file write PID to
'file'\n")
1713 @item -pidfile @var{file}
1715 Store the QEMU process PID in @var{file}. It is useful if you launch QEMU
1719 DEF("singlestep
", 0, QEMU_OPTION_singlestep, \
1720 "-singlestep always run
in singlestep mode
\n")
1724 Run the emulation in single step mode.
1727 DEF("S
", 0, QEMU_OPTION_S, \
1728 "-S freeze CPU at
startup (use
'c' to start execution
)\n")
1732 Do not start CPU at startup (you must type 'c' in the monitor).
1735 DEF("gdb
", HAS_ARG, QEMU_OPTION_gdb, \
1736 "-gdb dev wait
for gdb connection on
'dev'\n")
1738 @item -gdb @var{dev}
1740 Wait for gdb connection on device @var{dev} (@pxref{gdb_usage}). Typical
1741 connections will likely be TCP-based, but also UDP, pseudo TTY, or even
1742 stdio are reasonable use case. The latter is allowing to start qemu from
1743 within gdb and establish the connection via a pipe:
1745 (gdb) target remote | exec qemu -gdb stdio ...
1749 DEF("s
", 0, QEMU_OPTION_s, \
1750 "-s shorthand
for -gdb tcp
::" DEFAULT_GDBSTUB_PORT "\n")
1754 Shorthand for -gdb tcp::1234, i.e. open a gdbserver on TCP port 1234
1755 (@pxref{gdb_usage}).
1758 DEF("d
", HAS_ARG, QEMU_OPTION_d, \
1759 "-d item1
,... output log to
/tmp
/qemu
.log (use
-d ?
for a list of log items
)\n")
1763 Output log in /tmp/qemu.log
1766 DEF("hdachs
", HAS_ARG, QEMU_OPTION_hdachs, \
1767 "-hdachs c
,h
,s
[,t
]\n" \
1768 " force hard disk
0 physical geometry and the optional BIOS
\n" \
1769 " translation (t
=none or lba
) (usually qemu can guess them
)\n")
1771 @item -hdachs @var{c},@var{h},@var{s},[,@var{t}]
1773 Force hard disk 0 physical geometry (1 <= @var{c} <= 16383, 1 <=
1774 @var{h} <= 16, 1 <= @var{s} <= 63) and optionally force the BIOS
1775 translation mode (@var{t}=none, lba or auto). Usually QEMU can guess
1776 all those parameters. This option is useful for old MS-DOS disk
1780 DEF("L
", HAS_ARG, QEMU_OPTION_L, \
1781 "-L path set the directory
for the BIOS
, VGA BIOS and keymaps
\n")
1785 Set the directory for the BIOS, VGA BIOS and keymaps.
1788 DEF("bios
", HAS_ARG, QEMU_OPTION_bios, \
1789 "-bios file set the filename
for the BIOS
\n")
1791 @item -bios @var{file}
1793 Set the filename for the BIOS.
1797 DEF("enable
-kvm
", 0, QEMU_OPTION_enable_kvm, \
1798 "-enable
-kvm enable KVM full virtualization support
\n")
1803 Enable KVM full virtualization support. This option is only available
1804 if KVM support is enabled when compiling.
1808 DEF("xen
-domid
", HAS_ARG, QEMU_OPTION_xen_domid,
1809 "-xen
-domid id specify xen guest domain id
\n")
1810 DEF("xen
-create
", 0, QEMU_OPTION_xen_create,
1811 "-xen
-create create domain
using xen hypercalls
, bypassing xend
\n"
1812 " warning
: should not be used when xend is
in use
\n")
1813 DEF("xen
-attach
", 0, QEMU_OPTION_xen_attach,
1814 "-xen
-attach attach to existing xen domain
\n"
1815 " xend will use
this when starting qemu
\n")
1818 @item -xen-domid @var{id}
1820 Specify xen guest domain @var{id} (XEN only).
1823 Create domain using xen hypercalls, bypassing xend.
1824 Warning: should not be used when xend is in use (XEN only).
1827 Attach to existing xen domain.
1828 xend will use this when starting qemu (XEN only).
1831 DEF("no
-reboot
", 0, QEMU_OPTION_no_reboot, \
1832 "-no
-reboot exit instead of rebooting
\n")
1836 Exit instead of rebooting.
1839 DEF("no
-shutdown
", 0, QEMU_OPTION_no_shutdown, \
1840 "-no
-shutdown stop before shutdown
\n")
1843 @findex -no-shutdown
1844 Don't exit QEMU on guest shutdown, but instead only stop the emulation.
1845 This allows for instance switching to monitor to commit changes to the
1849 DEF("loadvm
", HAS_ARG, QEMU_OPTION_loadvm, \
1850 "-loadvm
[tag|id
]\n" \
1851 " start right away with a saved
state (loadvm
in monitor
)\n")
1853 @item -loadvm @var{file}
1855 Start right away with a saved state (@code{loadvm} in monitor)
1859 DEF("daemonize
", 0, QEMU_OPTION_daemonize, \
1860 "-daemonize daemonize QEMU after initializing
\n")
1865 Daemonize the QEMU process after initialization. QEMU will not detach from
1866 standard IO until it is ready to receive connections on any of its devices.
1867 This option is a useful way for external programs to launch QEMU without having
1868 to cope with initialization race conditions.
1871 DEF("option
-rom
", HAS_ARG, QEMU_OPTION_option_rom, \
1872 "-option
-rom rom load a file
, rom
, into the option ROM space
\n")
1874 @item -option-rom @var{file}
1876 Load the contents of @var{file} as an option ROM.
1877 This option is useful to load things like EtherBoot.
1880 DEF("clock
", HAS_ARG, QEMU_OPTION_clock, \
1881 "-clock force the use of the given methods
for timer alarm
.\n" \
1882 " To see what timers are available use
-clock ?
\n")
1884 @item -clock @var{method}
1886 Force the use of the given methods for timer alarm. To see what timers
1887 are available use -clock ?.
1890 HXCOMM Options deprecated by -rtc
1891 DEF("localtime
", 0, QEMU_OPTION_localtime, "")
1892 DEF("startdate
", HAS_ARG, QEMU_OPTION_startdate, "")
1895 DEF("rtc
", HAS_ARG, QEMU_OPTION_rtc, \
1896 "-rtc
[base
=utc|localtime|date
][,clock
=host|vm
][,driftfix
=none|slew
]\n" \
1897 " set the RTC base and clock
, enable drift fix
for clock ticks
\n")
1899 DEF("rtc
", HAS_ARG, QEMU_OPTION_rtc, \
1900 "-rtc
[base
=utc|localtime|date
][,clock
=host|vm
]\n" \
1901 " set the RTC base and clock
\n")
1906 @item -rtc [base=utc|localtime|@var{date}][,clock=host|vm][,driftfix=none|slew]
1908 Specify @option{base} as @code{utc} or @code{localtime} to let the RTC start at the current
1909 UTC or local time, respectively. @code{localtime} is required for correct date in
1910 MS-DOS or Windows. To start at a specific point in time, provide @var{date} in the
1911 format @code{2006-06-17T16:01:21} or @code{2006-06-17}. The default base is UTC.
1913 By default the RTC is driven by the host system time. This allows to use the
1914 RTC as accurate reference clock inside the guest, specifically if the host
1915 time is smoothly following an accurate external reference clock, e.g. via NTP.
1916 If you want to isolate the guest time from the host, even prevent it from
1917 progressing during suspension, you can set @option{clock} to @code{vm} instead.
1919 Enable @option{driftfix} (i386 targets only) if you experience time drift problems,
1920 specifically with Windows' ACPI HAL. This option will try to figure out how
1921 many timer interrupts were not processed by the Windows guest and will
1925 DEF("icount
", HAS_ARG, QEMU_OPTION_icount, \
1926 "-icount
[N|auto
]\n" \
1927 " enable virtual instruction counter with
2^N clock ticks per
\n" \
1930 @item -icount [@var{N}|auto]
1932 Enable virtual instruction counter. The virtual cpu will execute one
1933 instruction every 2^@var{N} ns of virtual time. If @code{auto} is specified
1934 then the virtual cpu speed will be automatically adjusted to keep virtual
1935 time within a few seconds of real time.
1937 Note that while this option can give deterministic behavior, it does not
1938 provide cycle accurate emulation. Modern CPUs contain superscalar out of
1939 order cores with complex cache hierarchies. The number of instructions
1940 executed often has little or no correlation with actual performance.
1943 DEF("watchdog
", HAS_ARG, QEMU_OPTION_watchdog, \
1944 "-watchdog i6300esb|ib700
\n" \
1945 " enable virtual hardware watchdog
[default=none
]\n")
1947 @item -watchdog @var{model}
1949 Create a virtual hardware watchdog device. Once enabled (by a guest
1950 action), the watchdog must be periodically polled by an agent inside
1951 the guest or else the guest will be restarted.
1953 The @var{model} is the model of hardware watchdog to emulate. Choices
1954 for model are: @code{ib700} (iBASE 700) which is a very simple ISA
1955 watchdog with a single timer, or @code{i6300esb} (Intel 6300ESB I/O
1956 controller hub) which is a much more featureful PCI-based dual-timer
1957 watchdog. Choose a model for which your guest has drivers.
1959 Use @code{-watchdog ?} to list available hardware models. Only one
1960 watchdog can be enabled for a guest.
1963 DEF("watchdog
-action
", HAS_ARG, QEMU_OPTION_watchdog_action, \
1964 "-watchdog
-action reset|shutdown|poweroff|pause|debug|none
\n" \
1965 " action when watchdog fires
[default=reset
]\n")
1967 @item -watchdog-action @var{action}
1969 The @var{action} controls what QEMU will do when the watchdog timer
1972 @code{reset} (forcefully reset the guest).
1973 Other possible actions are:
1974 @code{shutdown} (attempt to gracefully shutdown the guest),
1975 @code{poweroff} (forcefully poweroff the guest),
1976 @code{pause} (pause the guest),
1977 @code{debug} (print a debug message and continue), or
1978 @code{none} (do nothing).
1980 Note that the @code{shutdown} action requires that the guest responds
1981 to ACPI signals, which it may not be able to do in the sort of
1982 situations where the watchdog would have expired, and thus
1983 @code{-watchdog-action shutdown} is not recommended for production use.
1988 @item -watchdog i6300esb -watchdog-action pause
1989 @item -watchdog ib700
1993 DEF("echr
", HAS_ARG, QEMU_OPTION_echr, \
1994 "-echr chr set terminal escape character instead of ctrl
-a
\n")
1997 @item -echr @var{numeric_ascii_value}
1999 Change the escape character used for switching to the monitor when using
2000 monitor and serial sharing. The default is @code{0x01} when using the
2001 @code{-nographic} option. @code{0x01} is equal to pressing
2002 @code{Control-a}. You can select a different character from the ascii
2003 control keys where 1 through 26 map to Control-a through Control-z. For
2004 instance you could use the either of the following to change the escape
2005 character to Control-t.
2012 DEF("virtioconsole
", HAS_ARG, QEMU_OPTION_virtiocon, \
2013 "-virtioconsole c
\n" \
2014 " set virtio console
\n")
2016 @item -virtioconsole @var{c}
2017 @findex -virtioconsole
2020 This option is maintained for backward compatibility.
2022 Please use @code{-device virtconsole} for the new way of invocation.
2025 DEF("show
-cursor
", 0, QEMU_OPTION_show_cursor, \
2026 "-show
-cursor show cursor
\n")
2029 @findex -show-cursor
2033 DEF("tb
-size
", HAS_ARG, QEMU_OPTION_tb_size, \
2034 "-tb
-size n set TB size
\n")
2036 @item -tb-size @var{n}
2041 DEF("incoming
", HAS_ARG, QEMU_OPTION_incoming, \
2042 "-incoming p prepare
for incoming migration
, listen on port p
\n")
2044 @item -incoming @var{port}
2046 Prepare for incoming migration, listen on @var{port}.
2049 DEF("nodefaults
", 0, QEMU_OPTION_nodefaults, \
2050 "-nodefaults don
't create default devices\n")
2054 Don't create
default devices
.
2058 DEF("chroot", HAS_ARG
, QEMU_OPTION_chroot
, \
2059 "-chroot dir chroot to dir just before starting the VM\n")
2062 @item
-chroot @
var{dir
}
2064 Immediately before starting guest execution
, chroot to the specified
2065 directory
. Especially useful
in combination with
-runas
.
2069 DEF("runas", HAS_ARG
, QEMU_OPTION_runas
, \
2070 "-runas user change to user id user just before starting the VM\n")
2073 @item
-runas @
var{user
}
2075 Immediately before starting guest execution
, drop root privileges
, switching
2076 to the specified user
.
2079 #
if defined(TARGET_SPARC
) ||
defined(TARGET_PPC
)
2080 DEF("prom-env", HAS_ARG
, QEMU_OPTION_prom_env
,
2081 "-prom-env variable=value\n"
2082 " set OpenBIOS nvram variables\n")
2085 @item
-prom
-env @
var{variable
}=@
var{value
}
2087 Set OpenBIOS nvram @
var{variable
} to given @
var{value
} (PPC
, SPARC only
).
2089 #
if defined(TARGET_ARM
) ||
defined(TARGET_M68K
)
2090 DEF("semihosting", 0, QEMU_OPTION_semihosting
,
2091 "-semihosting semihosting mode\n")
2095 @findex
-semihosting
2096 Semihosting
mode (ARM
, M68K only
).
2098 #
if defined(TARGET_ARM
)
2099 DEF("old-param", 0, QEMU_OPTION_old_param
,
2100 "-old-param old param mode\n")
2104 @findex
-old
-param (ARM
)
2105 Old param
mode (ARM only
).
2108 DEF("readconfig", HAS_ARG
, QEMU_OPTION_readconfig
,
2109 "-readconfig <file>\n")
2111 @item
-readconfig @
var{file
}
2113 Read device configuration from @
var{file
}.
2115 DEF("writeconfig", HAS_ARG
, QEMU_OPTION_writeconfig
,
2116 "-writeconfig <file>\n"
2117 " read/write config file\n")
2119 @item
-writeconfig @
var{file
}
2120 @findex
-writeconfig
2121 Write device configuration to @
var{file
}.
2123 DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig
,
2125 " do not load default config files at startup\n")
2128 @findex
-nodefconfig
2129 Normally QEMU loads a configuration file from @
var{sysconfdir
}/qemu
.conf and
2130 @
var{sysconfdir
}/target
-@
var{ARCH
}.conf on startup
. The @code
{-nodefconfig
}
2131 option will prevent QEMU from loading these configuration files at startup
.
2134 DEF("no-kvm", 0, QEMU_OPTION_no_kvm
,
2135 "-no-kvm disable KVM hardware virtualization\n")
2136 DEF("no-kvm-irqchip", 0, QEMU_OPTION_no_kvm_irqchip
,
2137 "-no-kvm-irqchip disable KVM kernel mode PIC/IOAPIC/LAPIC\n")
2138 DEF("no-kvm-pit", 0, QEMU_OPTION_no_kvm_pit
,
2139 "-no-kvm-pit disable KVM kernel mode PIT\n")
2140 DEF("no-kvm-pit-reinjection", 0, QEMU_OPTION_no_kvm_pit_reinjection
,
2141 "-no-kvm-pit-reinjection\n"
2142 " disable KVM kernel mode PIT interrupt reinjection\n")
2143 #
if defined(TARGET_I386
) ||
defined(TARGET_X86_64
) ||
defined(TARGET_IA64
) ||
defined(__linux__
)
2144 DEF("pcidevice", HAS_ARG
, QEMU_OPTION_pcidevice
,
2145 "-pcidevice host=[seg:]bus:dev.func[,dma=none][,name=string]\n"
2146 " expose a PCI device to the guest OS\n"
2147 " dma=none: don't perform any dma translations (default is to use an iommu)\n"
2148 " 'string' is used in log output\n")
2150 DEF("enable-nesting", 0, QEMU_OPTION_enable_nesting
,
2151 "-enable-nesting enable support for running a VM inside the VM (AMD only)\n")
2152 DEF("nvram", HAS_ARG
, QEMU_OPTION_nvram
,
2153 "-nvram FILE provide ia64 nvram contents\n")
2154 DEF("tdf", 0, QEMU_OPTION_tdf
,
2155 "-tdf enable guest time drift compensation\n")
2156 DEF("kvm-shadow-memory", HAS_ARG
, QEMU_OPTION_kvm_shadow_memory
,
2157 "-kvm-shadow-memory MEGABYTES\n"
2158 " allocate MEGABYTES for kvm mmu shadowing\n")
2160 HXCOMM This is the last statement
. Insert
new options before
this line
!