root / qemu-options.hx @ b3ce604e
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HXCOMM Use DEFHEADING() to define headings in both help text and texi |
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HXCOMM Text between STEXI and ETEXI are copied to texi version and |
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HXCOMM discarded from C version |
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HXCOMM DEF(option, HAS_ARG/0, opt_enum, opt_help, arch_mask) is used to |
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HXCOMM construct option structures, enums and help message for specified |
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HXCOMM architectures. |
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HXCOMM HXCOMM can be used for comments, discarded from both texi and C |
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|
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DEFHEADING(Standard options:) |
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STEXI |
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@table @option |
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ETEXI |
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|
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DEF("help", 0, QEMU_OPTION_h, |
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"-h or -help display this help and exit\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -h |
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@findex -h |
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Display help and exit |
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ETEXI |
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|
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DEF("version", 0, QEMU_OPTION_version, |
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"-version display version information and exit\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -version |
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@findex -version |
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Display version information and exit |
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ETEXI |
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|
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DEF("machine", HAS_ARG, QEMU_OPTION_machine, \ |
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"-machine [type=]name[,prop[=value][,...]]\n" |
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" selects emulated machine (-machine ? for list)\n" |
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" property accel=accel1[:accel2[:...]] selects accelerator\n" |
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" supported accelerators are kvm, xen, tcg (default: tcg)\n" |
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" kernel_irqchip=on|off controls accelerated irqchip support\n" |
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" kvm_shadow_mem=size of KVM shadow MMU\n", |
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QEMU_ARCH_ALL) |
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STEXI |
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@item -machine [type=]@var{name}[,prop=@var{value}[,...]] |
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@findex -machine |
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Select the emulated machine by @var{name}. Use @code{-machine ?} to list |
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available machines. Supported machine properties are: |
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@table @option |
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@item accel=@var{accels1}[:@var{accels2}[:...]] |
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This is used to enable an accelerator. Depending on the target architecture, |
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kvm, xen, or tcg can be available. By default, tcg is used. If there is more |
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than one accelerator specified, the next one is used if the previous one fails |
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to initialize. |
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@item kernel_irqchip=on|off |
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Enables in-kernel irqchip support for the chosen accelerator when available. |
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@item kvm_shadow_mem=size |
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Defines the size of the KVM shadow MMU. |
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@end table |
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ETEXI |
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|
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HXCOMM Deprecated by -machine |
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DEF("M", HAS_ARG, QEMU_OPTION_M, "", QEMU_ARCH_ALL) |
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|
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DEF("cpu", HAS_ARG, QEMU_OPTION_cpu, |
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"-cpu cpu select CPU (-cpu ? for list)\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -cpu @var{model} |
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@findex -cpu |
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Select CPU model (-cpu ? for list and additional feature selection) |
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ETEXI |
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|
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DEF("smp", HAS_ARG, QEMU_OPTION_smp, |
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"-smp n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]\n" |
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" set the number of CPUs to 'n' [default=1]\n" |
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" maxcpus= maximum number of total cpus, including\n" |
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" offline CPUs for hotplug, etc\n" |
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" cores= number of CPU cores on one socket\n" |
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" threads= number of threads on one CPU core\n" |
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" sockets= number of discrete sockets in the system\n", |
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QEMU_ARCH_ALL) |
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STEXI |
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@item -smp @var{n}[,cores=@var{cores}][,threads=@var{threads}][,sockets=@var{sockets}][,maxcpus=@var{maxcpus}] |
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@findex -smp |
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Simulate an SMP system with @var{n} CPUs. On the PC target, up to 255 |
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CPUs are supported. On Sparc32 target, Linux limits the number of usable CPUs |
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to 4. |
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For the PC target, the number of @var{cores} per socket, the number |
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of @var{threads} per cores and the total number of @var{sockets} can be |
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specified. Missing values will be computed. If any on the three values is |
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given, the total number of CPUs @var{n} can be omitted. @var{maxcpus} |
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specifies the maximum number of hotpluggable CPUs. |
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ETEXI |
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|
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DEF("numa", HAS_ARG, QEMU_OPTION_numa, |
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"-numa node[,mem=size][,cpus=cpu[-cpu]][,nodeid=node]\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -numa @var{opts} |
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@findex -numa |
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Simulate a multi node NUMA system. If mem and cpus are omitted, resources |
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are split equally. |
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ETEXI |
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|
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DEF("fda", HAS_ARG, QEMU_OPTION_fda, |
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"-fda/-fdb file use 'file' as floppy disk 0/1 image\n", QEMU_ARCH_ALL) |
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DEF("fdb", HAS_ARG, QEMU_OPTION_fdb, "", QEMU_ARCH_ALL) |
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STEXI |
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@item -fda @var{file} |
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@item -fdb @var{file} |
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@findex -fda |
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@findex -fdb |
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Use @var{file} as floppy disk 0/1 image (@pxref{disk_images}). You can |
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use the host floppy by using @file{/dev/fd0} as filename (@pxref{host_drives}). |
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ETEXI |
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|
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DEF("hda", HAS_ARG, QEMU_OPTION_hda, |
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"-hda/-hdb file use 'file' as IDE hard disk 0/1 image\n", QEMU_ARCH_ALL) |
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DEF("hdb", HAS_ARG, QEMU_OPTION_hdb, "", QEMU_ARCH_ALL) |
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DEF("hdc", HAS_ARG, QEMU_OPTION_hdc, |
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"-hdc/-hdd file use 'file' as IDE hard disk 2/3 image\n", QEMU_ARCH_ALL) |
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DEF("hdd", HAS_ARG, QEMU_OPTION_hdd, "", QEMU_ARCH_ALL) |
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STEXI |
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@item -hda @var{file} |
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@item -hdb @var{file} |
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@item -hdc @var{file} |
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@item -hdd @var{file} |
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@findex -hda |
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@findex -hdb |
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@findex -hdc |
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@findex -hdd |
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Use @var{file} as hard disk 0, 1, 2 or 3 image (@pxref{disk_images}). |
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ETEXI |
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|
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DEF("cdrom", HAS_ARG, QEMU_OPTION_cdrom, |
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"-cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)\n", |
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QEMU_ARCH_ALL) |
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STEXI |
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@item -cdrom @var{file} |
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@findex -cdrom |
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Use @var{file} as CD-ROM image (you cannot use @option{-hdc} and |
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@option{-cdrom} at the same time). You can use the host CD-ROM by |
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using @file{/dev/cdrom} as filename (@pxref{host_drives}). |
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ETEXI |
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|
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DEF("drive", HAS_ARG, QEMU_OPTION_drive, |
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"-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]\n" |
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" [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]\n" |
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" [,cache=writethrough|writeback|none|directsync|unsafe][,format=f]\n" |
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" [,serial=s][,addr=A][,id=name][,aio=threads|native]\n" |
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" [,readonly=on|off][,copy-on-read=on|off]\n" |
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" [[,bps=b]|[[,bps_rd=r][,bps_wr=w]]][[,iops=i]|[[,iops_rd=r][,iops_wr=w]]\n" |
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" use 'file' as a drive image\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -drive @var{option}[,@var{option}[,@var{option}[,...]]] |
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@findex -drive |
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|
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Define a new drive. Valid options are: |
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|
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@table @option |
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@item file=@var{file} |
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This option defines which disk image (@pxref{disk_images}) to use with |
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this drive. If the filename contains comma, you must double it |
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(for instance, "file=my,,file" to use file "my,file"). |
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|
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Special files such as iSCSI devices can be specified using protocol |
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specific URLs. See the section for "Device URL Syntax" for more information. |
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@item if=@var{interface} |
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This option defines on which type on interface the drive is connected. |
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Available types are: ide, scsi, sd, mtd, floppy, pflash, virtio. |
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@item bus=@var{bus},unit=@var{unit} |
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These options define where is connected the drive by defining the bus number and |
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the unit id. |
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@item index=@var{index} |
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This option defines where is connected the drive by using an index in the list |
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of available connectors of a given interface type. |
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@item media=@var{media} |
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This option defines the type of the media: disk or cdrom. |
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@item cyls=@var{c},heads=@var{h},secs=@var{s}[,trans=@var{t}] |
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These options have the same definition as they have in @option{-hdachs}. |
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@item snapshot=@var{snapshot} |
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@var{snapshot} is "on" or "off" and allows to enable snapshot for given drive (see @option{-snapshot}). |
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@item cache=@var{cache} |
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@var{cache} is "none", "writeback", "unsafe", "directsync" or "writethrough" and controls how the host cache is used to access block data. |
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@item aio=@var{aio} |
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@var{aio} is "threads", or "native" and selects between pthread based disk I/O and native Linux AIO. |
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@item format=@var{format} |
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Specify which disk @var{format} will be used rather than detecting |
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the format. Can be used to specifiy format=raw to avoid interpreting |
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an untrusted format header. |
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@item serial=@var{serial} |
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This option specifies the serial number to assign to the device. |
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@item addr=@var{addr} |
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Specify the controller's PCI address (if=virtio only). |
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@item werror=@var{action},rerror=@var{action} |
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Specify which @var{action} to take on write and read errors. Valid actions are: |
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"ignore" (ignore the error and try to continue), "stop" (pause QEMU), |
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"report" (report the error to the guest), "enospc" (pause QEMU only if the |
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host disk is full; report the error to the guest otherwise). |
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The default setting is @option{werror=enospc} and @option{rerror=report}. |
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@item readonly |
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Open drive @option{file} as read-only. Guest write attempts will fail. |
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@item copy-on-read=@var{copy-on-read} |
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@var{copy-on-read} is "on" or "off" and enables whether to copy read backing |
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file sectors into the image file. |
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@end table |
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|
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By default, writethrough caching is used for all block device. This means that |
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the host page cache will be used to read and write data but write notification |
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will be sent to the guest only when the data has been reported as written by |
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the storage subsystem. |
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|
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Writeback caching will report data writes as completed as soon as the data is |
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present in the host page cache. This is safe as long as you trust your host. |
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If your host crashes or loses power, then the guest may experience data |
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corruption. |
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|
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The host page cache can be avoided entirely with @option{cache=none}. This will |
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attempt to do disk IO directly to the guests memory. QEMU may still perform |
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an internal copy of the data. |
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|
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The host page cache can be avoided while only sending write notifications to |
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the guest when the data has been reported as written by the storage subsystem |
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using @option{cache=directsync}. |
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|
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Some block drivers perform badly with @option{cache=writethrough}, most notably, |
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qcow2. If performance is more important than correctness, |
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@option{cache=writeback} should be used with qcow2. |
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|
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In case you don't care about data integrity over host failures, use |
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cache=unsafe. This option tells QEMU that it never needs to write any data |
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to the disk but can instead keeps things in cache. If anything goes wrong, |
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like your host losing power, the disk storage getting disconnected accidentally, |
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etc. you're image will most probably be rendered unusable. When using |
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the @option{-snapshot} option, unsafe caching is always used. |
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|
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Copy-on-read avoids accessing the same backing file sectors repeatedly and is |
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useful when the backing file is over a slow network. By default copy-on-read |
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is off. |
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|
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Instead of @option{-cdrom} you can use: |
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@example |
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qemu-system-i386 -drive file=file,index=2,media=cdrom |
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@end example |
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|
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Instead of @option{-hda}, @option{-hdb}, @option{-hdc}, @option{-hdd}, you can |
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use: |
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@example |
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qemu-system-i386 -drive file=file,index=0,media=disk |
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qemu-system-i386 -drive file=file,index=1,media=disk |
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qemu-system-i386 -drive file=file,index=2,media=disk |
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qemu-system-i386 -drive file=file,index=3,media=disk |
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@end example |
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|
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You can connect a CDROM to the slave of ide0: |
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@example |
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qemu-system-i386 -drive file=file,if=ide,index=1,media=cdrom |
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@end example |
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|
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If you don't specify the "file=" argument, you define an empty drive: |
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@example |
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qemu-system-i386 -drive if=ide,index=1,media=cdrom |
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@end example |
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|
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You can connect a SCSI disk with unit ID 6 on the bus #0: |
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@example |
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qemu-system-i386 -drive file=file,if=scsi,bus=0,unit=6 |
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@end example |
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|
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Instead of @option{-fda}, @option{-fdb}, you can use: |
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@example |
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qemu-system-i386 -drive file=file,index=0,if=floppy |
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qemu-system-i386 -drive file=file,index=1,if=floppy |
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@end example |
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|
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By default, @var{interface} is "ide" and @var{index} is automatically |
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incremented: |
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@example |
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qemu-system-i386 -drive file=a -drive file=b" |
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@end example |
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is interpreted like: |
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@example |
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qemu-system-i386 -hda a -hdb b |
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@end example |
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ETEXI |
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|
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DEF("set", HAS_ARG, QEMU_OPTION_set, |
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"-set group.id.arg=value\n" |
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" set <arg> parameter for item <id> of type <group>\n" |
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" i.e. -set drive.$id.file=/path/to/image\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -set |
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@findex -set |
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TODO |
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ETEXI |
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|
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DEF("global", HAS_ARG, QEMU_OPTION_global, |
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"-global driver.prop=value\n" |
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" set a global default for a driver property\n", |
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QEMU_ARCH_ALL) |
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STEXI |
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@item -global @var{driver}.@var{prop}=@var{value} |
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@findex -global |
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Set default value of @var{driver}'s property @var{prop} to @var{value}, e.g.: |
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|
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@example |
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qemu-system-i386 -global ide-drive.physical_block_size=4096 -drive file=file,if=ide,index=0,media=disk |
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@end example |
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|
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In particular, you can use this to set driver properties for devices which are |
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created automatically by the machine model. To create a device which is not |
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created automatically and set properties on it, use -@option{device}. |
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ETEXI |
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|
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DEF("mtdblock", HAS_ARG, QEMU_OPTION_mtdblock, |
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"-mtdblock file use 'file' as on-board Flash memory image\n", |
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QEMU_ARCH_ALL) |
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STEXI |
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@item -mtdblock @var{file} |
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@findex -mtdblock |
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Use @var{file} as on-board Flash memory image. |
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ETEXI |
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|
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DEF("sd", HAS_ARG, QEMU_OPTION_sd, |
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"-sd file use 'file' as SecureDigital card image\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -sd @var{file} |
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@findex -sd |
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Use @var{file} as SecureDigital card image. |
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ETEXI |
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|
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DEF("pflash", HAS_ARG, QEMU_OPTION_pflash, |
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"-pflash file use 'file' as a parallel flash image\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -pflash @var{file} |
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@findex -pflash |
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Use @var{file} as a parallel flash image. |
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ETEXI |
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|
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DEF("boot", HAS_ARG, QEMU_OPTION_boot, |
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"-boot [order=drives][,once=drives][,menu=on|off]\n" |
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" [,splash=sp_name][,splash-time=sp_time]\n" |
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" 'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)\n" |
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" 'sp_name': the file's name that would be passed to bios as logo picture, if menu=on\n" |
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" 'sp_time': the period that splash picture last if menu=on, unit is ms\n", |
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QEMU_ARCH_ALL) |
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STEXI |
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@item -boot [order=@var{drives}][,once=@var{drives}][,menu=on|off][,splash=@var{sp_name}][,splash-time=@var{sp_time}] |
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@findex -boot |
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Specify boot order @var{drives} as a string of drive letters. Valid |
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drive letters depend on the target achitecture. The x86 PC uses: a, b |
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(floppy 1 and 2), c (first hard disk), d (first CD-ROM), n-p (Etherboot |
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from network adapter 1-4), hard disk boot is the default. To apply a |
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particular boot order only on the first startup, specify it via |
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@option{once}. |
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|
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Interactive boot menus/prompts can be enabled via @option{menu=on} as far |
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as firmware/BIOS supports them. The default is non-interactive boot. |
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|
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A splash picture could be passed to bios, enabling user to show it as logo, |
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when option splash=@var{sp_name} is given and menu=on, If firmware/BIOS |
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supports them. Currently Seabios for X86 system support it. |
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limitation: The splash file could be a jpeg file or a BMP file in 24 BPP |
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format(true color). The resolution should be supported by the SVGA mode, so |
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the recommended is 320x240, 640x480, 800x640. |
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|
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@example |
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# try to boot from network first, then from hard disk |
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qemu-system-i386 -boot order=nc |
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# boot from CD-ROM first, switch back to default order after reboot |
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qemu-system-i386 -boot once=d |
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# boot with a splash picture for 5 seconds. |
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qemu-system-i386 -boot menu=on,splash=/root/boot.bmp,splash-time=5000 |
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@end example |
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|
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Note: The legacy format '-boot @var{drives}' is still supported but its |
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use is discouraged as it may be removed from future versions. |
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ETEXI |
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|
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DEF("snapshot", 0, QEMU_OPTION_snapshot, |
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"-snapshot write to temporary files instead of disk image files\n", |
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QEMU_ARCH_ALL) |
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STEXI |
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@item -snapshot |
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@findex -snapshot |
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Write to temporary files instead of disk image files. In this case, |
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the raw disk image you use is not written back. You can however force |
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the write back by pressing @key{C-a s} (@pxref{disk_images}). |
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ETEXI |
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|
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DEF("m", HAS_ARG, QEMU_OPTION_m, |
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"-m megs set virtual RAM size to megs MB [default=" |
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stringify(DEFAULT_RAM_SIZE) "]\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -m @var{megs} |
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@findex -m |
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Set virtual RAM size to @var{megs} megabytes. Default is 128 MiB. Optionally, |
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a suffix of ``M'' or ``G'' can be used to signify a value in megabytes or |
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gigabytes respectively. |
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ETEXI |
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|
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DEF("mem-path", HAS_ARG, QEMU_OPTION_mempath, |
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"-mem-path FILE provide backing storage for guest RAM\n", QEMU_ARCH_ALL) |
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STEXI |
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@item -mem-path @var{path} |
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Allocate guest RAM from a temporarily created file in @var{path}. |
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ETEXI |
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|
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#ifdef MAP_POPULATE |
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DEF("mem-prealloc", 0, QEMU_OPTION_mem_prealloc, |
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"-mem-prealloc preallocate guest memory (use with -mem-path)\n", |
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QEMU_ARCH_ALL) |
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STEXI |
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@item -mem-prealloc |
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Preallocate memory when using -mem-path. |
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ETEXI |
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#endif |
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|
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DEF("k", HAS_ARG, QEMU_OPTION_k, |
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"-k language use keyboard layout (for example 'fr' for French)\n", |
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QEMU_ARCH_ALL) |
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STEXI |
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@item -k @var{language} |
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@findex -k |
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Use keyboard layout @var{language} (for example @code{fr} for |
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French). This option is only needed where it is not easy to get raw PC |
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keycodes (e.g. on Macs, with some X11 servers or with a VNC |
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display). You don't normally need to use it on PC/Linux or PC/Windows |
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hosts. |
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|
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The available layouts are: |
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@example |
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ar de-ch es fo fr-ca hu ja mk no pt-br sv |
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da en-gb et fr fr-ch is lt nl pl ru th |
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de en-us fi fr-be hr it lv nl-be pt sl tr |
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@end example |
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|
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The default is @code{en-us}. |
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ETEXI |
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|
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|
435 |
DEF("audio-help", 0, QEMU_OPTION_audio_help, |
436 |
"-audio-help print list of audio drivers and their options\n", |
437 |
QEMU_ARCH_ALL) |
438 |
STEXI |
439 |
@item -audio-help |
440 |
@findex -audio-help |
441 |
Will show the audio subsystem help: list of drivers, tunable |
442 |
parameters. |
443 |
ETEXI |
444 |
|
445 |
DEF("soundhw", HAS_ARG, QEMU_OPTION_soundhw, |
446 |
"-soundhw c1,... enable audio support\n" |
447 |
" and only specified sound cards (comma separated list)\n" |
448 |
" use -soundhw ? to get the list of supported cards\n" |
449 |
" use -soundhw all to enable all of them\n", QEMU_ARCH_ALL) |
450 |
STEXI |
451 |
@item -soundhw @var{card1}[,@var{card2},...] or -soundhw all |
452 |
@findex -soundhw |
453 |
Enable audio and selected sound hardware. Use ? to print all |
454 |
available sound hardware. |
455 |
|
456 |
@example |
457 |
qemu-system-i386 -soundhw sb16,adlib disk.img |
458 |
qemu-system-i386 -soundhw es1370 disk.img |
459 |
qemu-system-i386 -soundhw ac97 disk.img |
460 |
qemu-system-i386 -soundhw hda disk.img |
461 |
qemu-system-i386 -soundhw all disk.img |
462 |
qemu-system-i386 -soundhw ? |
463 |
@end example |
464 |
|
465 |
Note that Linux's i810_audio OSS kernel (for AC97) module might |
466 |
require manually specifying clocking. |
467 |
|
468 |
@example |
469 |
modprobe i810_audio clocking=48000 |
470 |
@end example |
471 |
ETEXI |
472 |
|
473 |
DEF("balloon", HAS_ARG, QEMU_OPTION_balloon, |
474 |
"-balloon none disable balloon device\n" |
475 |
"-balloon virtio[,addr=str]\n" |
476 |
" enable virtio balloon device (default)\n", QEMU_ARCH_ALL) |
477 |
STEXI |
478 |
@item -balloon none |
479 |
@findex -balloon |
480 |
Disable balloon device. |
481 |
@item -balloon virtio[,addr=@var{addr}] |
482 |
Enable virtio balloon device (default), optionally with PCI address |
483 |
@var{addr}. |
484 |
ETEXI |
485 |
|
486 |
STEXI |
487 |
@end table |
488 |
ETEXI |
489 |
|
490 |
DEF("usb", 0, QEMU_OPTION_usb, |
491 |
"-usb enable the USB driver (will be the default soon)\n", |
492 |
QEMU_ARCH_ALL) |
493 |
STEXI |
494 |
USB options: |
495 |
@table @option |
496 |
|
497 |
@item -usb |
498 |
@findex -usb |
499 |
Enable the USB driver (will be the default soon) |
500 |
ETEXI |
501 |
|
502 |
DEF("usbdevice", HAS_ARG, QEMU_OPTION_usbdevice, |
503 |
"-usbdevice name add the host or guest USB device 'name'\n", |
504 |
QEMU_ARCH_ALL) |
505 |
STEXI |
506 |
|
507 |
@item -usbdevice @var{devname} |
508 |
@findex -usbdevice |
509 |
Add the USB device @var{devname}. @xref{usb_devices}. |
510 |
|
511 |
@table @option |
512 |
|
513 |
@item mouse |
514 |
Virtual Mouse. This will override the PS/2 mouse emulation when activated. |
515 |
|
516 |
@item tablet |
517 |
Pointer device that uses absolute coordinates (like a touchscreen). This |
518 |
means QEMU is able to report the mouse position without having to grab the |
519 |
mouse. Also overrides the PS/2 mouse emulation when activated. |
520 |
|
521 |
@item disk:[format=@var{format}]:@var{file} |
522 |
Mass storage device based on file. The optional @var{format} argument |
523 |
will be used rather than detecting the format. Can be used to specifiy |
524 |
@code{format=raw} to avoid interpreting an untrusted format header. |
525 |
|
526 |
@item host:@var{bus}.@var{addr} |
527 |
Pass through the host device identified by @var{bus}.@var{addr} (Linux only). |
528 |
|
529 |
@item host:@var{vendor_id}:@var{product_id} |
530 |
Pass through the host device identified by @var{vendor_id}:@var{product_id} |
531 |
(Linux only). |
532 |
|
533 |
@item serial:[vendorid=@var{vendor_id}][,productid=@var{product_id}]:@var{dev} |
534 |
Serial converter to host character device @var{dev}, see @code{-serial} for the |
535 |
available devices. |
536 |
|
537 |
@item braille |
538 |
Braille device. This will use BrlAPI to display the braille output on a real |
539 |
or fake device. |
540 |
|
541 |
@item net:@var{options} |
542 |
Network adapter that supports CDC ethernet and RNDIS protocols. |
543 |
|
544 |
@end table |
545 |
ETEXI |
546 |
|
547 |
DEF("device", HAS_ARG, QEMU_OPTION_device, |
548 |
"-device driver[,prop[=value][,...]]\n" |
549 |
" add device (based on driver)\n" |
550 |
" prop=value,... sets driver properties\n" |
551 |
" use -device ? to print all possible drivers\n" |
552 |
" use -device driver,? to print all possible properties\n", |
553 |
QEMU_ARCH_ALL) |
554 |
STEXI |
555 |
@item -device @var{driver}[,@var{prop}[=@var{value}][,...]] |
556 |
@findex -device |
557 |
Add device @var{driver}. @var{prop}=@var{value} sets driver |
558 |
properties. Valid properties depend on the driver. To get help on |
559 |
possible drivers and properties, use @code{-device ?} and |
560 |
@code{-device @var{driver},?}. |
561 |
ETEXI |
562 |
|
563 |
DEFHEADING() |
564 |
|
565 |
DEFHEADING(File system options:) |
566 |
|
567 |
DEF("fsdev", HAS_ARG, QEMU_OPTION_fsdev, |
568 |
"-fsdev fsdriver,id=id[,path=path,][security_model={mapped-xattr|mapped-file|passthrough|none}]\n" |
569 |
" [,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd]\n", |
570 |
QEMU_ARCH_ALL) |
571 |
|
572 |
STEXI |
573 |
|
574 |
@item -fsdev @var{fsdriver},id=@var{id},path=@var{path},[security_model=@var{security_model}][,writeout=@var{writeout}][,readonly][,socket=@var{socket}|sock_fd=@var{sock_fd}] |
575 |
@findex -fsdev |
576 |
Define a new file system device. Valid options are: |
577 |
@table @option |
578 |
@item @var{fsdriver} |
579 |
This option specifies the fs driver backend to use. |
580 |
Currently "local", "handle" and "proxy" file system drivers are supported. |
581 |
@item id=@var{id} |
582 |
Specifies identifier for this device |
583 |
@item path=@var{path} |
584 |
Specifies the export path for the file system device. Files under |
585 |
this path will be available to the 9p client on the guest. |
586 |
@item security_model=@var{security_model} |
587 |
Specifies the security model to be used for this export path. |
588 |
Supported security models are "passthrough", "mapped-xattr", "mapped-file" and "none". |
589 |
In "passthrough" security model, files are stored using the same |
590 |
credentials as they are created on the guest. This requires QEMU |
591 |
to run as root. In "mapped-xattr" security model, some of the file |
592 |
attributes like uid, gid, mode bits and link target are stored as |
593 |
file attributes. For "mapped-file" these attributes are stored in the |
594 |
hidden .virtfs_metadata directory. Directories exported by this security model cannot |
595 |
interact with other unix tools. "none" security model is same as |
596 |
passthrough except the sever won't report failures if it fails to |
597 |
set file attributes like ownership. Security model is mandatory |
598 |
only for local fsdriver. Other fsdrivers (like handle, proxy) don't take |
599 |
security model as a parameter. |
600 |
@item writeout=@var{writeout} |
601 |
This is an optional argument. The only supported value is "immediate". |
602 |
This means that host page cache will be used to read and write data but |
603 |
write notification will be sent to the guest only when the data has been |
604 |
reported as written by the storage subsystem. |
605 |
@item readonly |
606 |
Enables exporting 9p share as a readonly mount for guests. By default |
607 |
read-write access is given. |
608 |
@item socket=@var{socket} |
609 |
Enables proxy filesystem driver to use passed socket file for communicating |
610 |
with virtfs-proxy-helper |
611 |
@item sock_fd=@var{sock_fd} |
612 |
Enables proxy filesystem driver to use passed socket descriptor for |
613 |
communicating with virtfs-proxy-helper. Usually a helper like libvirt |
614 |
will create socketpair and pass one of the fds as sock_fd |
615 |
@end table |
616 |
|
617 |
-fsdev option is used along with -device driver "virtio-9p-pci". |
618 |
@item -device virtio-9p-pci,fsdev=@var{id},mount_tag=@var{mount_tag} |
619 |
Options for virtio-9p-pci driver are: |
620 |
@table @option |
621 |
@item fsdev=@var{id} |
622 |
Specifies the id value specified along with -fsdev option |
623 |
@item mount_tag=@var{mount_tag} |
624 |
Specifies the tag name to be used by the guest to mount this export point |
625 |
@end table |
626 |
|
627 |
ETEXI |
628 |
|
629 |
DEFHEADING() |
630 |
|
631 |
DEFHEADING(Virtual File system pass-through options:) |
632 |
|
633 |
DEF("virtfs", HAS_ARG, QEMU_OPTION_virtfs, |
634 |
"-virtfs local,path=path,mount_tag=tag,security_model=[mapped-xattr|mapped-file|passthrough|none]\n" |
635 |
" [,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd]\n", |
636 |
QEMU_ARCH_ALL) |
637 |
|
638 |
STEXI |
639 |
|
640 |
@item -virtfs @var{fsdriver}[,path=@var{path}],mount_tag=@var{mount_tag}[,security_model=@var{security_model}][,writeout=@var{writeout}][,readonly][,socket=@var{socket}|sock_fd=@var{sock_fd}] |
641 |
@findex -virtfs |
642 |
|
643 |
The general form of a Virtual File system pass-through options are: |
644 |
@table @option |
645 |
@item @var{fsdriver} |
646 |
This option specifies the fs driver backend to use. |
647 |
Currently "local", "handle" and "proxy" file system drivers are supported. |
648 |
@item id=@var{id} |
649 |
Specifies identifier for this device |
650 |
@item path=@var{path} |
651 |
Specifies the export path for the file system device. Files under |
652 |
this path will be available to the 9p client on the guest. |
653 |
@item security_model=@var{security_model} |
654 |
Specifies the security model to be used for this export path. |
655 |
Supported security models are "passthrough", "mapped-xattr", "mapped-file" and "none". |
656 |
In "passthrough" security model, files are stored using the same |
657 |
credentials as they are created on the guest. This requires QEMU |
658 |
to run as root. In "mapped-xattr" security model, some of the file |
659 |
attributes like uid, gid, mode bits and link target are stored as |
660 |
file attributes. For "mapped-file" these attributes are stored in the |
661 |
hidden .virtfs_metadata directory. Directories exported by this security model cannot |
662 |
interact with other unix tools. "none" security model is same as |
663 |
passthrough except the sever won't report failures if it fails to |
664 |
set file attributes like ownership. Security model is mandatory only |
665 |
for local fsdriver. Other fsdrivers (like handle, proxy) don't take security |
666 |
model as a parameter. |
667 |
@item writeout=@var{writeout} |
668 |
This is an optional argument. The only supported value is "immediate". |
669 |
This means that host page cache will be used to read and write data but |
670 |
write notification will be sent to the guest only when the data has been |
671 |
reported as written by the storage subsystem. |
672 |
@item readonly |
673 |
Enables exporting 9p share as a readonly mount for guests. By default |
674 |
read-write access is given. |
675 |
@item socket=@var{socket} |
676 |
Enables proxy filesystem driver to use passed socket file for |
677 |
communicating with virtfs-proxy-helper. Usually a helper like libvirt |
678 |
will create socketpair and pass one of the fds as sock_fd |
679 |
@item sock_fd |
680 |
Enables proxy filesystem driver to use passed 'sock_fd' as the socket |
681 |
descriptor for interfacing with virtfs-proxy-helper |
682 |
@end table |
683 |
ETEXI |
684 |
|
685 |
DEF("virtfs_synth", 0, QEMU_OPTION_virtfs_synth, |
686 |
"-virtfs_synth Create synthetic file system image\n", |
687 |
QEMU_ARCH_ALL) |
688 |
STEXI |
689 |
@item -virtfs_synth |
690 |
@findex -virtfs_synth |
691 |
Create synthetic file system image |
692 |
ETEXI |
693 |
|
694 |
DEFHEADING() |
695 |
|
696 |
DEF("name", HAS_ARG, QEMU_OPTION_name, |
697 |
"-name string1[,process=string2]\n" |
698 |
" set the name of the guest\n" |
699 |
" string1 sets the window title and string2 the process name (on Linux)\n", |
700 |
QEMU_ARCH_ALL) |
701 |
STEXI |
702 |
@item -name @var{name} |
703 |
@findex -name |
704 |
Sets the @var{name} of the guest. |
705 |
This name will be displayed in the SDL window caption. |
706 |
The @var{name} will also be used for the VNC server. |
707 |
Also optionally set the top visible process name in Linux. |
708 |
ETEXI |
709 |
|
710 |
DEF("uuid", HAS_ARG, QEMU_OPTION_uuid, |
711 |
"-uuid %08x-%04x-%04x-%04x-%012x\n" |
712 |
" specify machine UUID\n", QEMU_ARCH_ALL) |
713 |
STEXI |
714 |
@item -uuid @var{uuid} |
715 |
@findex -uuid |
716 |
Set system UUID. |
717 |
ETEXI |
718 |
|
719 |
STEXI |
720 |
@end table |
721 |
ETEXI |
722 |
|
723 |
DEFHEADING() |
724 |
|
725 |
DEFHEADING(Display options:) |
726 |
|
727 |
STEXI |
728 |
@table @option |
729 |
ETEXI |
730 |
|
731 |
DEF("display", HAS_ARG, QEMU_OPTION_display, |
732 |
"-display sdl[,frame=on|off][,alt_grab=on|off][,ctrl_grab=on|off]\n" |
733 |
" [,window_close=on|off]|curses|none|\n" |
734 |
" vnc=<display>[,<optargs>]\n" |
735 |
" select display type\n", QEMU_ARCH_ALL) |
736 |
STEXI |
737 |
@item -display @var{type} |
738 |
@findex -display |
739 |
Select type of display to use. This option is a replacement for the |
740 |
old style -sdl/-curses/... options. Valid values for @var{type} are |
741 |
@table @option |
742 |
@item sdl |
743 |
Display video output via SDL (usually in a separate graphics |
744 |
window; see the SDL documentation for other possibilities). |
745 |
@item curses |
746 |
Display video output via curses. For graphics device models which |
747 |
support a text mode, QEMU can display this output using a |
748 |
curses/ncurses interface. Nothing is displayed when the graphics |
749 |
device is in graphical mode or if the graphics device does not support |
750 |
a text mode. Generally only the VGA device models support text mode. |
751 |
@item none |
752 |
Do not display video output. The guest will still see an emulated |
753 |
graphics card, but its output will not be displayed to the QEMU |
754 |
user. This option differs from the -nographic option in that it |
755 |
only affects what is done with video output; -nographic also changes |
756 |
the destination of the serial and parallel port data. |
757 |
@item vnc |
758 |
Start a VNC server on display <arg> |
759 |
@end table |
760 |
ETEXI |
761 |
|
762 |
DEF("nographic", 0, QEMU_OPTION_nographic, |
763 |
"-nographic disable graphical output and redirect serial I/Os to console\n", |
764 |
QEMU_ARCH_ALL) |
765 |
STEXI |
766 |
@item -nographic |
767 |
@findex -nographic |
768 |
Normally, QEMU uses SDL to display the VGA output. With this option, |
769 |
you can totally disable graphical output so that QEMU is a simple |
770 |
command line application. The emulated serial port is redirected on |
771 |
the console. Therefore, you can still use QEMU to debug a Linux kernel |
772 |
with a serial console. |
773 |
ETEXI |
774 |
|
775 |
DEF("curses", 0, QEMU_OPTION_curses, |
776 |
"-curses use a curses/ncurses interface instead of SDL\n", |
777 |
QEMU_ARCH_ALL) |
778 |
STEXI |
779 |
@item -curses |
780 |
@findex curses |
781 |
Normally, QEMU uses SDL to display the VGA output. With this option, |
782 |
QEMU can display the VGA output when in text mode using a |
783 |
curses/ncurses interface. Nothing is displayed in graphical mode. |
784 |
ETEXI |
785 |
|
786 |
DEF("no-frame", 0, QEMU_OPTION_no_frame, |
787 |
"-no-frame open SDL window without a frame and window decorations\n", |
788 |
QEMU_ARCH_ALL) |
789 |
STEXI |
790 |
@item -no-frame |
791 |
@findex -no-frame |
792 |
Do not use decorations for SDL windows and start them using the whole |
793 |
available screen space. This makes the using QEMU in a dedicated desktop |
794 |
workspace more convenient. |
795 |
ETEXI |
796 |
|
797 |
DEF("alt-grab", 0, QEMU_OPTION_alt_grab, |
798 |
"-alt-grab use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)\n", |
799 |
QEMU_ARCH_ALL) |
800 |
STEXI |
801 |
@item -alt-grab |
802 |
@findex -alt-grab |
803 |
Use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt). Note that this also |
804 |
affects the special keys (for fullscreen, monitor-mode switching, etc). |
805 |
ETEXI |
806 |
|
807 |
DEF("ctrl-grab", 0, QEMU_OPTION_ctrl_grab, |
808 |
"-ctrl-grab use Right-Ctrl to grab mouse (instead of Ctrl-Alt)\n", |
809 |
QEMU_ARCH_ALL) |
810 |
STEXI |
811 |
@item -ctrl-grab |
812 |
@findex -ctrl-grab |
813 |
Use Right-Ctrl to grab mouse (instead of Ctrl-Alt). Note that this also |
814 |
affects the special keys (for fullscreen, monitor-mode switching, etc). |
815 |
ETEXI |
816 |
|
817 |
DEF("no-quit", 0, QEMU_OPTION_no_quit, |
818 |
"-no-quit disable SDL window close capability\n", QEMU_ARCH_ALL) |
819 |
STEXI |
820 |
@item -no-quit |
821 |
@findex -no-quit |
822 |
Disable SDL window close capability. |
823 |
ETEXI |
824 |
|
825 |
DEF("sdl", 0, QEMU_OPTION_sdl, |
826 |
"-sdl enable SDL\n", QEMU_ARCH_ALL) |
827 |
STEXI |
828 |
@item -sdl |
829 |
@findex -sdl |
830 |
Enable SDL. |
831 |
ETEXI |
832 |
|
833 |
DEF("spice", HAS_ARG, QEMU_OPTION_spice, |
834 |
"-spice <args> enable spice\n", QEMU_ARCH_ALL) |
835 |
STEXI |
836 |
@item -spice @var{option}[,@var{option}[,...]] |
837 |
@findex -spice |
838 |
Enable the spice remote desktop protocol. Valid options are |
839 |
|
840 |
@table @option |
841 |
|
842 |
@item port=<nr> |
843 |
Set the TCP port spice is listening on for plaintext channels. |
844 |
|
845 |
@item addr=<addr> |
846 |
Set the IP address spice is listening on. Default is any address. |
847 |
|
848 |
@item ipv4 |
849 |
@item ipv6 |
850 |
Force using the specified IP version. |
851 |
|
852 |
@item password=<secret> |
853 |
Set the password you need to authenticate. |
854 |
|
855 |
@item sasl |
856 |
Require that the client use SASL to authenticate with the spice. |
857 |
The exact choice of authentication method used is controlled from the |
858 |
system / user's SASL configuration file for the 'qemu' service. This |
859 |
is typically found in /etc/sasl2/qemu.conf. If running QEMU as an |
860 |
unprivileged user, an environment variable SASL_CONF_PATH can be used |
861 |
to make it search alternate locations for the service config. |
862 |
While some SASL auth methods can also provide data encryption (eg GSSAPI), |
863 |
it is recommended that SASL always be combined with the 'tls' and |
864 |
'x509' settings to enable use of SSL and server certificates. This |
865 |
ensures a data encryption preventing compromise of authentication |
866 |
credentials. |
867 |
|
868 |
@item disable-ticketing |
869 |
Allow client connects without authentication. |
870 |
|
871 |
@item disable-copy-paste |
872 |
Disable copy paste between the client and the guest. |
873 |
|
874 |
@item tls-port=<nr> |
875 |
Set the TCP port spice is listening on for encrypted channels. |
876 |
|
877 |
@item x509-dir=<dir> |
878 |
Set the x509 file directory. Expects same filenames as -vnc $display,x509=$dir |
879 |
|
880 |
@item x509-key-file=<file> |
881 |
@item x509-key-password=<file> |
882 |
@item x509-cert-file=<file> |
883 |
@item x509-cacert-file=<file> |
884 |
@item x509-dh-key-file=<file> |
885 |
The x509 file names can also be configured individually. |
886 |
|
887 |
@item tls-ciphers=<list> |
888 |
Specify which ciphers to use. |
889 |
|
890 |
@item tls-channel=[main|display|cursor|inputs|record|playback] |
891 |
@item plaintext-channel=[main|display|cursor|inputs|record|playback] |
892 |
Force specific channel to be used with or without TLS encryption. The |
893 |
options can be specified multiple times to configure multiple |
894 |
channels. The special name "default" can be used to set the default |
895 |
mode. For channels which are not explicitly forced into one mode the |
896 |
spice client is allowed to pick tls/plaintext as he pleases. |
897 |
|
898 |
@item image-compression=[auto_glz|auto_lz|quic|glz|lz|off] |
899 |
Configure image compression (lossless). |
900 |
Default is auto_glz. |
901 |
|
902 |
@item jpeg-wan-compression=[auto|never|always] |
903 |
@item zlib-glz-wan-compression=[auto|never|always] |
904 |
Configure wan image compression (lossy for slow links). |
905 |
Default is auto. |
906 |
|
907 |
@item streaming-video=[off|all|filter] |
908 |
Configure video stream detection. Default is filter. |
909 |
|
910 |
@item agent-mouse=[on|off] |
911 |
Enable/disable passing mouse events via vdagent. Default is on. |
912 |
|
913 |
@item playback-compression=[on|off] |
914 |
Enable/disable audio stream compression (using celt 0.5.1). Default is on. |
915 |
|
916 |
@end table |
917 |
ETEXI |
918 |
|
919 |
DEF("portrait", 0, QEMU_OPTION_portrait, |
920 |
"-portrait rotate graphical output 90 deg left (only PXA LCD)\n", |
921 |
QEMU_ARCH_ALL) |
922 |
STEXI |
923 |
@item -portrait |
924 |
@findex -portrait |
925 |
Rotate graphical output 90 deg left (only PXA LCD). |
926 |
ETEXI |
927 |
|
928 |
DEF("rotate", HAS_ARG, QEMU_OPTION_rotate, |
929 |
"-rotate <deg> rotate graphical output some deg left (only PXA LCD)\n", |
930 |
QEMU_ARCH_ALL) |
931 |
STEXI |
932 |
@item -rotate |
933 |
@findex -rotate |
934 |
Rotate graphical output some deg left (only PXA LCD). |
935 |
ETEXI |
936 |
|
937 |
DEF("vga", HAS_ARG, QEMU_OPTION_vga, |
938 |
"-vga [std|cirrus|vmware|qxl|xenfb|none]\n" |
939 |
" select video card type\n", QEMU_ARCH_ALL) |
940 |
STEXI |
941 |
@item -vga @var{type} |
942 |
@findex -vga |
943 |
Select type of VGA card to emulate. Valid values for @var{type} are |
944 |
@table @option |
945 |
@item cirrus |
946 |
Cirrus Logic GD5446 Video card. All Windows versions starting from |
947 |
Windows 95 should recognize and use this graphic card. For optimal |
948 |
performances, use 16 bit color depth in the guest and the host OS. |
949 |
(This one is the default) |
950 |
@item std |
951 |
Standard VGA card with Bochs VBE extensions. If your guest OS |
952 |
supports the VESA 2.0 VBE extensions (e.g. Windows XP) and if you want |
953 |
to use high resolution modes (>= 1280x1024x16) then you should use |
954 |
this option. |
955 |
@item vmware |
956 |
VMWare SVGA-II compatible adapter. Use it if you have sufficiently |
957 |
recent XFree86/XOrg server or Windows guest with a driver for this |
958 |
card. |
959 |
@item qxl |
960 |
QXL paravirtual graphic card. It is VGA compatible (including VESA |
961 |
2.0 VBE support). Works best with qxl guest drivers installed though. |
962 |
Recommended choice when using the spice protocol. |
963 |
@item none |
964 |
Disable VGA card. |
965 |
@end table |
966 |
ETEXI |
967 |
|
968 |
DEF("full-screen", 0, QEMU_OPTION_full_screen, |
969 |
"-full-screen start in full screen\n", QEMU_ARCH_ALL) |
970 |
STEXI |
971 |
@item -full-screen |
972 |
@findex -full-screen |
973 |
Start in full screen. |
974 |
ETEXI |
975 |
|
976 |
DEF("g", 1, QEMU_OPTION_g , |
977 |
"-g WxH[xDEPTH] Set the initial graphical resolution and depth\n", |
978 |
QEMU_ARCH_PPC | QEMU_ARCH_SPARC) |
979 |
STEXI |
980 |
@item -g @var{width}x@var{height}[x@var{depth}] |
981 |
@findex -g |
982 |
Set the initial graphical resolution and depth (PPC, SPARC only). |
983 |
ETEXI |
984 |
|
985 |
DEF("vnc", HAS_ARG, QEMU_OPTION_vnc , |
986 |
"-vnc display start a VNC server on display\n", QEMU_ARCH_ALL) |
987 |
STEXI |
988 |
@item -vnc @var{display}[,@var{option}[,@var{option}[,...]]] |
989 |
@findex -vnc |
990 |
Normally, QEMU uses SDL to display the VGA output. With this option, |
991 |
you can have QEMU listen on VNC display @var{display} and redirect the VGA |
992 |
display over the VNC session. It is very useful to enable the usb |
993 |
tablet device when using this option (option @option{-usbdevice |
994 |
tablet}). When using the VNC display, you must use the @option{-k} |
995 |
parameter to set the keyboard layout if you are not using en-us. Valid |
996 |
syntax for the @var{display} is |
997 |
|
998 |
@table @option |
999 |
|
1000 |
@item @var{host}:@var{d} |
1001 |
|
1002 |
TCP connections will only be allowed from @var{host} on display @var{d}. |
1003 |
By convention the TCP port is 5900+@var{d}. Optionally, @var{host} can |
1004 |
be omitted in which case the server will accept connections from any host. |
1005 |
|
1006 |
@item unix:@var{path} |
1007 |
|
1008 |
Connections will be allowed over UNIX domain sockets where @var{path} is the |
1009 |
location of a unix socket to listen for connections on. |
1010 |
|
1011 |
@item none |
1012 |
|
1013 |
VNC is initialized but not started. The monitor @code{change} command |
1014 |
can be used to later start the VNC server. |
1015 |
|
1016 |
@end table |
1017 |
|
1018 |
Following the @var{display} value there may be one or more @var{option} flags |
1019 |
separated by commas. Valid options are |
1020 |
|
1021 |
@table @option |
1022 |
|
1023 |
@item reverse |
1024 |
|
1025 |
Connect to a listening VNC client via a ``reverse'' connection. The |
1026 |
client is specified by the @var{display}. For reverse network |
1027 |
connections (@var{host}:@var{d},@code{reverse}), the @var{d} argument |
1028 |
is a TCP port number, not a display number. |
1029 |
|
1030 |
@item password |
1031 |
|
1032 |
Require that password based authentication is used for client connections. |
1033 |
The password must be set separately using the @code{change} command in the |
1034 |
@ref{pcsys_monitor} |
1035 |
|
1036 |
@item tls |
1037 |
|
1038 |
Require that client use TLS when communicating with the VNC server. This |
1039 |
uses anonymous TLS credentials so is susceptible to a man-in-the-middle |
1040 |
attack. It is recommended that this option be combined with either the |
1041 |
@option{x509} or @option{x509verify} options. |
1042 |
|
1043 |
@item x509=@var{/path/to/certificate/dir} |
1044 |
|
1045 |
Valid if @option{tls} is specified. Require that x509 credentials are used |
1046 |
for negotiating the TLS session. The server will send its x509 certificate |
1047 |
to the client. It is recommended that a password be set on the VNC server |
1048 |
to provide authentication of the client when this is used. The path following |
1049 |
this option specifies where the x509 certificates are to be loaded from. |
1050 |
See the @ref{vnc_security} section for details on generating certificates. |
1051 |
|
1052 |
@item x509verify=@var{/path/to/certificate/dir} |
1053 |
|
1054 |
Valid if @option{tls} is specified. Require that x509 credentials are used |
1055 |
for negotiating the TLS session. The server will send its x509 certificate |
1056 |
to the client, and request that the client send its own x509 certificate. |
1057 |
The server will validate the client's certificate against the CA certificate, |
1058 |
and reject clients when validation fails. If the certificate authority is |
1059 |
trusted, this is a sufficient authentication mechanism. You may still wish |
1060 |
to set a password on the VNC server as a second authentication layer. The |
1061 |
path following this option specifies where the x509 certificates are to |
1062 |
be loaded from. See the @ref{vnc_security} section for details on generating |
1063 |
certificates. |
1064 |
|
1065 |
@item sasl |
1066 |
|
1067 |
Require that the client use SASL to authenticate with the VNC server. |
1068 |
The exact choice of authentication method used is controlled from the |
1069 |
system / user's SASL configuration file for the 'qemu' service. This |
1070 |
is typically found in /etc/sasl2/qemu.conf. If running QEMU as an |
1071 |
unprivileged user, an environment variable SASL_CONF_PATH can be used |
1072 |
to make it search alternate locations for the service config. |
1073 |
While some SASL auth methods can also provide data encryption (eg GSSAPI), |
1074 |
it is recommended that SASL always be combined with the 'tls' and |
1075 |
'x509' settings to enable use of SSL and server certificates. This |
1076 |
ensures a data encryption preventing compromise of authentication |
1077 |
credentials. See the @ref{vnc_security} section for details on using |
1078 |
SASL authentication. |
1079 |
|
1080 |
@item acl |
1081 |
|
1082 |
Turn on access control lists for checking of the x509 client certificate |
1083 |
and SASL party. For x509 certs, the ACL check is made against the |
1084 |
certificate's distinguished name. This is something that looks like |
1085 |
@code{C=GB,O=ACME,L=Boston,CN=bob}. For SASL party, the ACL check is |
1086 |
made against the username, which depending on the SASL plugin, may |
1087 |
include a realm component, eg @code{bob} or @code{bob@@EXAMPLE.COM}. |
1088 |
When the @option{acl} flag is set, the initial access list will be |
1089 |
empty, with a @code{deny} policy. Thus no one will be allowed to |
1090 |
use the VNC server until the ACLs have been loaded. This can be |
1091 |
achieved using the @code{acl} monitor command. |
1092 |
|
1093 |
@item lossy |
1094 |
|
1095 |
Enable lossy compression methods (gradient, JPEG, ...). If this |
1096 |
option is set, VNC client may receive lossy framebuffer updates |
1097 |
depending on its encoding settings. Enabling this option can save |
1098 |
a lot of bandwidth at the expense of quality. |
1099 |
|
1100 |
@item non-adaptive |
1101 |
|
1102 |
Disable adaptive encodings. Adaptive encodings are enabled by default. |
1103 |
An adaptive encoding will try to detect frequently updated screen regions, |
1104 |
and send updates in these regions using a lossy encoding (like JPEG). |
1105 |
This can be really helpful to save bandwidth when playing videos. Disabling |
1106 |
adaptive encodings allows to restore the original static behavior of encodings |
1107 |
like Tight. |
1108 |
|
1109 |
@item share=[allow-exclusive|force-shared|ignore] |
1110 |
|
1111 |
Set display sharing policy. 'allow-exclusive' allows clients to ask |
1112 |
for exclusive access. As suggested by the rfb spec this is |
1113 |
implemented by dropping other connections. Connecting multiple |
1114 |
clients in parallel requires all clients asking for a shared session |
1115 |
(vncviewer: -shared switch). This is the default. 'force-shared' |
1116 |
disables exclusive client access. Useful for shared desktop sessions, |
1117 |
where you don't want someone forgetting specify -shared disconnect |
1118 |
everybody else. 'ignore' completely ignores the shared flag and |
1119 |
allows everybody connect unconditionally. Doesn't conform to the rfb |
1120 |
spec but is traditional QEMU behavior. |
1121 |
|
1122 |
@end table |
1123 |
ETEXI |
1124 |
|
1125 |
STEXI |
1126 |
@end table |
1127 |
ETEXI |
1128 |
|
1129 |
ARCHHEADING(, QEMU_ARCH_I386) |
1130 |
|
1131 |
ARCHHEADING(i386 target only:, QEMU_ARCH_I386) |
1132 |
STEXI |
1133 |
@table @option |
1134 |
ETEXI |
1135 |
|
1136 |
DEF("win2k-hack", 0, QEMU_OPTION_win2k_hack, |
1137 |
"-win2k-hack use it when installing Windows 2000 to avoid a disk full bug\n", |
1138 |
QEMU_ARCH_I386) |
1139 |
STEXI |
1140 |
@item -win2k-hack |
1141 |
@findex -win2k-hack |
1142 |
Use it when installing Windows 2000 to avoid a disk full bug. After |
1143 |
Windows 2000 is installed, you no longer need this option (this option |
1144 |
slows down the IDE transfers). |
1145 |
ETEXI |
1146 |
|
1147 |
HXCOMM Deprecated by -rtc |
1148 |
DEF("rtc-td-hack", 0, QEMU_OPTION_rtc_td_hack, "", QEMU_ARCH_I386) |
1149 |
|
1150 |
DEF("no-fd-bootchk", 0, QEMU_OPTION_no_fd_bootchk, |
1151 |
"-no-fd-bootchk disable boot signature checking for floppy disks\n", |
1152 |
QEMU_ARCH_I386) |
1153 |
STEXI |
1154 |
@item -no-fd-bootchk |
1155 |
@findex -no-fd-bootchk |
1156 |
Disable boot signature checking for floppy disks in Bochs BIOS. It may |
1157 |
be needed to boot from old floppy disks. |
1158 |
TODO: check reference to Bochs BIOS. |
1159 |
ETEXI |
1160 |
|
1161 |
DEF("no-acpi", 0, QEMU_OPTION_no_acpi, |
1162 |
"-no-acpi disable ACPI\n", QEMU_ARCH_I386) |
1163 |
STEXI |
1164 |
@item -no-acpi |
1165 |
@findex -no-acpi |
1166 |
Disable ACPI (Advanced Configuration and Power Interface) support. Use |
1167 |
it if your guest OS complains about ACPI problems (PC target machine |
1168 |
only). |
1169 |
ETEXI |
1170 |
|
1171 |
DEF("no-hpet", 0, QEMU_OPTION_no_hpet, |
1172 |
"-no-hpet disable HPET\n", QEMU_ARCH_I386) |
1173 |
STEXI |
1174 |
@item -no-hpet |
1175 |
@findex -no-hpet |
1176 |
Disable HPET support. |
1177 |
ETEXI |
1178 |
|
1179 |
DEF("acpitable", HAS_ARG, QEMU_OPTION_acpitable, |
1180 |
"-acpitable [sig=str][,rev=n][,oem_id=str][,oem_table_id=str][,oem_rev=n][,asl_compiler_id=str][,asl_compiler_rev=n][,{data|file}=file1[:file2]...]\n" |
1181 |
" ACPI table description\n", QEMU_ARCH_I386) |
1182 |
STEXI |
1183 |
@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}]...] |
1184 |
@findex -acpitable |
1185 |
Add ACPI table with specified header fields and context from specified files. |
1186 |
For file=, take whole ACPI table from the specified files, including all |
1187 |
ACPI headers (possible overridden by other options). |
1188 |
For data=, only data |
1189 |
portion of the table is used, all header information is specified in the |
1190 |
command line. |
1191 |
ETEXI |
1192 |
|
1193 |
DEF("smbios", HAS_ARG, QEMU_OPTION_smbios, |
1194 |
"-smbios file=binary\n" |
1195 |
" load SMBIOS entry from binary file\n" |
1196 |
"-smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d]\n" |
1197 |
" specify SMBIOS type 0 fields\n" |
1198 |
"-smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str]\n" |
1199 |
" [,uuid=uuid][,sku=str][,family=str]\n" |
1200 |
" specify SMBIOS type 1 fields\n", QEMU_ARCH_I386) |
1201 |
STEXI |
1202 |
@item -smbios file=@var{binary} |
1203 |
@findex -smbios |
1204 |
Load SMBIOS entry from binary file. |
1205 |
|
1206 |
@item -smbios type=0[,vendor=@var{str}][,version=@var{str}][,date=@var{str}][,release=@var{%d.%d}] |
1207 |
@findex -smbios |
1208 |
Specify SMBIOS type 0 fields |
1209 |
|
1210 |
@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}] |
1211 |
Specify SMBIOS type 1 fields |
1212 |
ETEXI |
1213 |
|
1214 |
DEFHEADING() |
1215 |
STEXI |
1216 |
@end table |
1217 |
ETEXI |
1218 |
|
1219 |
DEFHEADING(Network options:) |
1220 |
STEXI |
1221 |
@table @option |
1222 |
ETEXI |
1223 |
|
1224 |
HXCOMM Legacy slirp options (now moved to -net user): |
1225 |
#ifdef CONFIG_SLIRP |
1226 |
DEF("tftp", HAS_ARG, QEMU_OPTION_tftp, "", QEMU_ARCH_ALL) |
1227 |
DEF("bootp", HAS_ARG, QEMU_OPTION_bootp, "", QEMU_ARCH_ALL) |
1228 |
DEF("redir", HAS_ARG, QEMU_OPTION_redir, "", QEMU_ARCH_ALL) |
1229 |
#ifndef _WIN32 |
1230 |
DEF("smb", HAS_ARG, QEMU_OPTION_smb, "", QEMU_ARCH_ALL) |
1231 |
#endif |
1232 |
#endif |
1233 |
|
1234 |
DEF("net", HAS_ARG, QEMU_OPTION_net, |
1235 |
"-net nic[,vlan=n][,macaddr=mac][,model=type][,name=str][,addr=str][,vectors=v]\n" |
1236 |
" create a new Network Interface Card and connect it to VLAN 'n'\n" |
1237 |
#ifdef CONFIG_SLIRP |
1238 |
"-net user[,vlan=n][,name=str][,net=addr[/mask]][,host=addr][,restrict=on|off]\n" |
1239 |
" [,hostname=host][,dhcpstart=addr][,dns=addr][,tftp=dir][,bootfile=f]\n" |
1240 |
" [,hostfwd=rule][,guestfwd=rule]" |
1241 |
#ifndef _WIN32 |
1242 |
"[,smb=dir[,smbserver=addr]]\n" |
1243 |
#endif |
1244 |
" connect the user mode network stack to VLAN 'n', configure its\n" |
1245 |
" DHCP server and enabled optional services\n" |
1246 |
#endif |
1247 |
#ifdef _WIN32 |
1248 |
"-net tap[,vlan=n][,name=str],ifname=name\n" |
1249 |
" connect the host TAP network interface to VLAN 'n'\n" |
1250 |
#else |
1251 |
"-net tap[,vlan=n][,name=str][,fd=h][,ifname=name][,script=file][,downscript=dfile][,helper=helper][,sndbuf=nbytes][,vnet_hdr=on|off][,vhost=on|off][,vhostfd=h][,vhostforce=on|off]\n" |
1252 |
" connect the host TAP network interface to VLAN 'n' \n" |
1253 |
" use network scripts 'file' (default=" DEFAULT_NETWORK_SCRIPT ")\n" |
1254 |
" to configure it and 'dfile' (default=" DEFAULT_NETWORK_DOWN_SCRIPT ")\n" |
1255 |
" to deconfigure it\n" |
1256 |
" use '[down]script=no' to disable script execution\n" |
1257 |
" use network helper 'helper' (default=" DEFAULT_BRIDGE_HELPER ") to\n" |
1258 |
" configure it\n" |
1259 |
" use 'fd=h' to connect to an already opened TAP interface\n" |
1260 |
" use 'sndbuf=nbytes' to limit the size of the send buffer (the\n" |
1261 |
" default is disabled 'sndbuf=0' to enable flow control set 'sndbuf=1048576')\n" |
1262 |
" use vnet_hdr=off to avoid enabling the IFF_VNET_HDR tap flag\n" |
1263 |
" use vnet_hdr=on to make the lack of IFF_VNET_HDR support an error condition\n" |
1264 |
" use vhost=on to enable experimental in kernel accelerator\n" |
1265 |
" (only has effect for virtio guests which use MSIX)\n" |
1266 |
" use vhostforce=on to force vhost on for non-MSIX virtio guests\n" |
1267 |
" use 'vhostfd=h' to connect to an already opened vhost net device\n" |
1268 |
"-net bridge[,vlan=n][,name=str][,br=bridge][,helper=helper]\n" |
1269 |
" connects a host TAP network interface to a host bridge device 'br'\n" |
1270 |
" (default=" DEFAULT_BRIDGE_INTERFACE ") using the program 'helper'\n" |
1271 |
" (default=" DEFAULT_BRIDGE_HELPER ")\n" |
1272 |
#endif |
1273 |
"-net socket[,vlan=n][,name=str][,fd=h][,listen=[host]:port][,connect=host:port]\n" |
1274 |
" connect the vlan 'n' to another VLAN using a socket connection\n" |
1275 |
"-net socket[,vlan=n][,name=str][,fd=h][,mcast=maddr:port[,localaddr=addr]]\n" |
1276 |
" connect the vlan 'n' to multicast maddr and port\n" |
1277 |
" use 'localaddr=addr' to specify the host address to send packets from\n" |
1278 |
"-net socket[,vlan=n][,name=str][,fd=h][,udp=host:port][,localaddr=host:port]\n" |
1279 |
" connect the vlan 'n' to another VLAN using an UDP tunnel\n" |
1280 |
#ifdef CONFIG_VDE |
1281 |
"-net vde[,vlan=n][,name=str][,sock=socketpath][,port=n][,group=groupname][,mode=octalmode]\n" |
1282 |
" connect the vlan 'n' to port 'n' of a vde switch running\n" |
1283 |
" on host and listening for incoming connections on 'socketpath'.\n" |
1284 |
" Use group 'groupname' and mode 'octalmode' to change default\n" |
1285 |
" ownership and permissions for communication port.\n" |
1286 |
#endif |
1287 |
"-net dump[,vlan=n][,file=f][,len=n]\n" |
1288 |
" dump traffic on vlan 'n' to file 'f' (max n bytes per packet)\n" |
1289 |
"-net none use it alone to have zero network devices. If no -net option\n" |
1290 |
" is provided, the default is '-net nic -net user'\n", QEMU_ARCH_ALL) |
1291 |
DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, |
1292 |
"-netdev [" |
1293 |
#ifdef CONFIG_SLIRP |
1294 |
"user|" |
1295 |
#endif |
1296 |
"tap|" |
1297 |
"bridge|" |
1298 |
#ifdef CONFIG_VDE |
1299 |
"vde|" |
1300 |
#endif |
1301 |
"socket],id=str[,option][,option][,...]\n", QEMU_ARCH_ALL) |
1302 |
STEXI |
1303 |
@item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}] [,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}] |
1304 |
@findex -net |
1305 |
Create a new Network Interface Card and connect it to VLAN @var{n} (@var{n} |
1306 |
= 0 is the default). The NIC is an e1000 by default on the PC |
1307 |
target. Optionally, the MAC address can be changed to @var{mac}, the |
1308 |
device address set to @var{addr} (PCI cards only), |
1309 |
and a @var{name} can be assigned for use in monitor commands. |
1310 |
Optionally, for PCI cards, you can specify the number @var{v} of MSI-X vectors |
1311 |
that the card should have; this option currently only affects virtio cards; set |
1312 |
@var{v} = 0 to disable MSI-X. If no @option{-net} option is specified, a single |
1313 |
NIC is created. QEMU can emulate several different models of network card. |
1314 |
Valid values for @var{type} are |
1315 |
@code{virtio}, @code{i82551}, @code{i82557b}, @code{i82559er}, |
1316 |
@code{ne2k_pci}, @code{ne2k_isa}, @code{pcnet}, @code{rtl8139}, |
1317 |
@code{e1000}, @code{smc91c111}, @code{lance} and @code{mcf_fec}. |
1318 |
Not all devices are supported on all targets. Use -net nic,model=? |
1319 |
for a list of available devices for your target. |
1320 |
|
1321 |
@item -net user[,@var{option}][,@var{option}][,...] |
1322 |
Use the user mode network stack which requires no administrator |
1323 |
privilege to run. Valid options are: |
1324 |
|
1325 |
@table @option |
1326 |
@item vlan=@var{n} |
1327 |
Connect user mode stack to VLAN @var{n} (@var{n} = 0 is the default). |
1328 |
|
1329 |
@item name=@var{name} |
1330 |
Assign symbolic name for use in monitor commands. |
1331 |
|
1332 |
@item net=@var{addr}[/@var{mask}] |
1333 |
Set IP network address the guest will see. Optionally specify the netmask, |
1334 |
either in the form a.b.c.d or as number of valid top-most bits. Default is |
1335 |
10.0.2.0/24. |
1336 |
|
1337 |
@item host=@var{addr} |
1338 |
Specify the guest-visible address of the host. Default is the 2nd IP in the |
1339 |
guest network, i.e. x.x.x.2. |
1340 |
|
1341 |
@item restrict=on|off |
1342 |
If this option is enabled, the guest will be isolated, i.e. it will not be |
1343 |
able to contact the host and no guest IP packets will be routed over the host |
1344 |
to the outside. This option does not affect any explicitly set forwarding rules. |
1345 |
|
1346 |
@item hostname=@var{name} |
1347 |
Specifies the client hostname reported by the builtin DHCP server. |
1348 |
|
1349 |
@item dhcpstart=@var{addr} |
1350 |
Specify the first of the 16 IPs the built-in DHCP server can assign. Default |
1351 |
is the 15th to 31st IP in the guest network, i.e. x.x.x.15 to x.x.x.31. |
1352 |
|
1353 |
@item dns=@var{addr} |
1354 |
Specify the guest-visible address of the virtual nameserver. The address must |
1355 |
be different from the host address. Default is the 3rd IP in the guest network, |
1356 |
i.e. x.x.x.3. |
1357 |
|
1358 |
@item tftp=@var{dir} |
1359 |
When using the user mode network stack, activate a built-in TFTP |
1360 |
server. The files in @var{dir} will be exposed as the root of a TFTP server. |
1361 |
The TFTP client on the guest must be configured in binary mode (use the command |
1362 |
@code{bin} of the Unix TFTP client). |
1363 |
|
1364 |
@item bootfile=@var{file} |
1365 |
When using the user mode network stack, broadcast @var{file} as the BOOTP |
1366 |
filename. In conjunction with @option{tftp}, this can be used to network boot |
1367 |
a guest from a local directory. |
1368 |
|
1369 |
Example (using pxelinux): |
1370 |
@example |
1371 |
qemu-system-i386 -hda linux.img -boot n -net user,tftp=/path/to/tftp/files,bootfile=/pxelinux.0 |
1372 |
@end example |
1373 |
|
1374 |
@item smb=@var{dir}[,smbserver=@var{addr}] |
1375 |
When using the user mode network stack, activate a built-in SMB |
1376 |
server so that Windows OSes can access to the host files in @file{@var{dir}} |
1377 |
transparently. The IP address of the SMB server can be set to @var{addr}. By |
1378 |
default the 4th IP in the guest network is used, i.e. x.x.x.4. |
1379 |
|
1380 |
In the guest Windows OS, the line: |
1381 |
@example |
1382 |
10.0.2.4 smbserver |
1383 |
@end example |
1384 |
must be added in the file @file{C:\WINDOWS\LMHOSTS} (for windows 9x/Me) |
1385 |
or @file{C:\WINNT\SYSTEM32\DRIVERS\ETC\LMHOSTS} (Windows NT/2000). |
1386 |
|
1387 |
Then @file{@var{dir}} can be accessed in @file{\\smbserver\qemu}. |
1388 |
|
1389 |
Note that a SAMBA server must be installed on the host OS. |
1390 |
QEMU was tested successfully with smbd versions from Red Hat 9, |
1391 |
Fedora Core 3 and OpenSUSE 11.x. |
1392 |
|
1393 |
@item hostfwd=[tcp|udp]:[@var{hostaddr}]:@var{hostport}-[@var{guestaddr}]:@var{guestport} |
1394 |
Redirect incoming TCP or UDP connections to the host port @var{hostport} to |
1395 |
the guest IP address @var{guestaddr} on guest port @var{guestport}. If |
1396 |
@var{guestaddr} is not specified, its value is x.x.x.15 (default first address |
1397 |
given by the built-in DHCP server). By specifying @var{hostaddr}, the rule can |
1398 |
be bound to a specific host interface. If no connection type is set, TCP is |
1399 |
used. This option can be given multiple times. |
1400 |
|
1401 |
For example, to redirect host X11 connection from screen 1 to guest |
1402 |
screen 0, use the following: |
1403 |
|
1404 |
@example |
1405 |
# on the host |
1406 |
qemu-system-i386 -net user,hostfwd=tcp:127.0.0.1:6001-:6000 [...] |
1407 |
# this host xterm should open in the guest X11 server |
1408 |
xterm -display :1 |
1409 |
@end example |
1410 |
|
1411 |
To redirect telnet connections from host port 5555 to telnet port on |
1412 |
the guest, use the following: |
1413 |
|
1414 |
@example |
1415 |
# on the host |
1416 |
qemu-system-i386 -net user,hostfwd=tcp::5555-:23 [...] |
1417 |
telnet localhost 5555 |
1418 |
@end example |
1419 |
|
1420 |
Then when you use on the host @code{telnet localhost 5555}, you |
1421 |
connect to the guest telnet server. |
1422 |
|
1423 |
@item guestfwd=[tcp]:@var{server}:@var{port}-@var{dev} |
1424 |
Forward guest TCP connections to the IP address @var{server} on port @var{port} |
1425 |
to the character device @var{dev}. This option can be given multiple times. |
1426 |
|
1427 |
@end table |
1428 |
|
1429 |
Note: Legacy stand-alone options -tftp, -bootp, -smb and -redir are still |
1430 |
processed and applied to -net user. Mixing them with the new configuration |
1431 |
syntax gives undefined results. Their use for new applications is discouraged |
1432 |
as they will be removed from future versions. |
1433 |
|
1434 |
@item -net tap[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,ifname=@var{name}][,script=@var{file}][,downscript=@var{dfile}][,helper=@var{helper}] |
1435 |
Connect the host TAP network interface @var{name} to VLAN @var{n}. |
1436 |
|
1437 |
Use the network script @var{file} to configure it and the network script |
1438 |
@var{dfile} to deconfigure it. If @var{name} is not provided, the OS |
1439 |
automatically provides one. The default network configure script is |
1440 |
@file{/etc/qemu-ifup} and the default network deconfigure script is |
1441 |
@file{/etc/qemu-ifdown}. Use @option{script=no} or @option{downscript=no} |
1442 |
to disable script execution. |
1443 |
|
1444 |
If running QEMU as an unprivileged user, use the network helper |
1445 |
@var{helper} to configure the TAP interface. The default network |
1446 |
helper executable is @file{/usr/local/libexec/qemu-bridge-helper}. |
1447 |
|
1448 |
@option{fd}=@var{h} can be used to specify the handle of an already |
1449 |
opened host TAP interface. |
1450 |
|
1451 |
Examples: |
1452 |
|
1453 |
@example |
1454 |
#launch a QEMU instance with the default network script |
1455 |
qemu-system-i386 linux.img -net nic -net tap |
1456 |
@end example |
1457 |
|
1458 |
@example |
1459 |
#launch a QEMU instance with two NICs, each one connected |
1460 |
#to a TAP device |
1461 |
qemu-system-i386 linux.img \ |
1462 |
-net nic,vlan=0 -net tap,vlan=0,ifname=tap0 \ |
1463 |
-net nic,vlan=1 -net tap,vlan=1,ifname=tap1 |
1464 |
@end example |
1465 |
|
1466 |
@example |
1467 |
#launch a QEMU instance with the default network helper to |
1468 |
#connect a TAP device to bridge br0 |
1469 |
qemu-system-i386 linux.img \ |
1470 |
-net nic -net tap,"helper=/usr/local/libexec/qemu-bridge-helper" |
1471 |
@end example |
1472 |
|
1473 |
@item -net bridge[,vlan=@var{n}][,name=@var{name}][,br=@var{bridge}][,helper=@var{helper}] |
1474 |
Connect a host TAP network interface to a host bridge device. |
1475 |
|
1476 |
Use the network helper @var{helper} to configure the TAP interface and |
1477 |
attach it to the bridge. The default network helper executable is |
1478 |
@file{/usr/local/libexec/qemu-bridge-helper} and the default bridge |
1479 |
device is @file{br0}. |
1480 |
|
1481 |
Examples: |
1482 |
|
1483 |
@example |
1484 |
#launch a QEMU instance with the default network helper to |
1485 |
#connect a TAP device to bridge br0 |
1486 |
qemu-system-i386 linux.img -net bridge -net nic,model=virtio |
1487 |
@end example |
1488 |
|
1489 |
@example |
1490 |
#launch a QEMU instance with the default network helper to |
1491 |
#connect a TAP device to bridge qemubr0 |
1492 |
qemu-system-i386 linux.img -net bridge,br=qemubr0 -net nic,model=virtio |
1493 |
@end example |
1494 |
|
1495 |
@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,listen=[@var{host}]:@var{port}][,connect=@var{host}:@var{port}] |
1496 |
|
1497 |
Connect the VLAN @var{n} to a remote VLAN in another QEMU virtual |
1498 |
machine using a TCP socket connection. If @option{listen} is |
1499 |
specified, QEMU waits for incoming connections on @var{port} |
1500 |
(@var{host} is optional). @option{connect} is used to connect to |
1501 |
another QEMU instance using the @option{listen} option. @option{fd}=@var{h} |
1502 |
specifies an already opened TCP socket. |
1503 |
|
1504 |
Example: |
1505 |
@example |
1506 |
# launch a first QEMU instance |
1507 |
qemu-system-i386 linux.img \ |
1508 |
-net nic,macaddr=52:54:00:12:34:56 \ |
1509 |
-net socket,listen=:1234 |
1510 |
# connect the VLAN 0 of this instance to the VLAN 0 |
1511 |
# of the first instance |
1512 |
qemu-system-i386 linux.img \ |
1513 |
-net nic,macaddr=52:54:00:12:34:57 \ |
1514 |
-net socket,connect=127.0.0.1:1234 |
1515 |
@end example |
1516 |
|
1517 |
@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,mcast=@var{maddr}:@var{port}[,localaddr=@var{addr}]] |
1518 |
|
1519 |
Create a VLAN @var{n} shared with another QEMU virtual |
1520 |
machines using a UDP multicast socket, effectively making a bus for |
1521 |
every QEMU with same multicast address @var{maddr} and @var{port}. |
1522 |
NOTES: |
1523 |
@enumerate |
1524 |
@item |
1525 |
Several QEMU can be running on different hosts and share same bus (assuming |
1526 |
correct multicast setup for these hosts). |
1527 |
@item |
1528 |
mcast support is compatible with User Mode Linux (argument @option{eth@var{N}=mcast}), see |
1529 |
@url{http://user-mode-linux.sf.net}. |
1530 |
@item |
1531 |
Use @option{fd=h} to specify an already opened UDP multicast socket. |
1532 |
@end enumerate |
1533 |
|
1534 |
Example: |
1535 |
@example |
1536 |
# launch one QEMU instance |
1537 |
qemu-system-i386 linux.img \ |
1538 |
-net nic,macaddr=52:54:00:12:34:56 \ |
1539 |
-net socket,mcast=230.0.0.1:1234 |
1540 |
# launch another QEMU instance on same "bus" |
1541 |
qemu-system-i386 linux.img \ |
1542 |
-net nic,macaddr=52:54:00:12:34:57 \ |
1543 |
-net socket,mcast=230.0.0.1:1234 |
1544 |
# launch yet another QEMU instance on same "bus" |
1545 |
qemu-system-i386 linux.img \ |
1546 |
-net nic,macaddr=52:54:00:12:34:58 \ |
1547 |
-net socket,mcast=230.0.0.1:1234 |
1548 |
@end example |
1549 |
|
1550 |
Example (User Mode Linux compat.): |
1551 |
@example |
1552 |
# launch QEMU instance (note mcast address selected |
1553 |
# is UML's default) |
1554 |
qemu-system-i386 linux.img \ |
1555 |
-net nic,macaddr=52:54:00:12:34:56 \ |
1556 |
-net socket,mcast=239.192.168.1:1102 |
1557 |
# launch UML |
1558 |
/path/to/linux ubd0=/path/to/root_fs eth0=mcast |
1559 |
@end example |
1560 |
|
1561 |
Example (send packets from host's 1.2.3.4): |
1562 |
@example |
1563 |
qemu-system-i386 linux.img \ |
1564 |
-net nic,macaddr=52:54:00:12:34:56 \ |
1565 |
-net socket,mcast=239.192.168.1:1102,localaddr=1.2.3.4 |
1566 |
@end example |
1567 |
|
1568 |
@item -net vde[,vlan=@var{n}][,name=@var{name}][,sock=@var{socketpath}] [,port=@var{n}][,group=@var{groupname}][,mode=@var{octalmode}] |
1569 |
Connect VLAN @var{n} to PORT @var{n} of a vde switch running on host and |
1570 |
listening for incoming connections on @var{socketpath}. Use GROUP @var{groupname} |
1571 |
and MODE @var{octalmode} to change default ownership and permissions for |
1572 |
communication port. This option is only available if QEMU has been compiled |
1573 |
with vde support enabled. |
1574 |
|
1575 |
Example: |
1576 |
@example |
1577 |
# launch vde switch |
1578 |
vde_switch -F -sock /tmp/myswitch |
1579 |
# launch QEMU instance |
1580 |
qemu-system-i386 linux.img -net nic -net vde,sock=/tmp/myswitch |
1581 |
@end example |
1582 |
|
1583 |
@item -net dump[,vlan=@var{n}][,file=@var{file}][,len=@var{len}] |
1584 |
Dump network traffic on VLAN @var{n} to file @var{file} (@file{qemu-vlan0.pcap} by default). |
1585 |
At most @var{len} bytes (64k by default) per packet are stored. The file format is |
1586 |
libpcap, so it can be analyzed with tools such as tcpdump or Wireshark. |
1587 |
|
1588 |
@item -net none |
1589 |
Indicate that no network devices should be configured. It is used to |
1590 |
override the default configuration (@option{-net nic -net user}) which |
1591 |
is activated if no @option{-net} options are provided. |
1592 |
|
1593 |
@end table |
1594 |
ETEXI |
1595 |
|
1596 |
DEFHEADING() |
1597 |
|
1598 |
DEFHEADING(Character device options:) |
1599 |
|
1600 |
DEF("chardev", HAS_ARG, QEMU_OPTION_chardev, |
1601 |
"-chardev null,id=id[,mux=on|off]\n" |
1602 |
"-chardev socket,id=id[,host=host],port=host[,to=to][,ipv4][,ipv6][,nodelay]\n" |
1603 |
" [,server][,nowait][,telnet][,mux=on|off] (tcp)\n" |
1604 |
"-chardev socket,id=id,path=path[,server][,nowait][,telnet],[mux=on|off] (unix)\n" |
1605 |
"-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]\n" |
1606 |
" [,localport=localport][,ipv4][,ipv6][,mux=on|off]\n" |
1607 |
"-chardev msmouse,id=id[,mux=on|off]\n" |
1608 |
"-chardev vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]\n" |
1609 |
" [,mux=on|off]\n" |
1610 |
"-chardev file,id=id,path=path[,mux=on|off]\n" |
1611 |
"-chardev pipe,id=id,path=path[,mux=on|off]\n" |
1612 |
#ifdef _WIN32 |
1613 |
"-chardev console,id=id[,mux=on|off]\n" |
1614 |
"-chardev serial,id=id,path=path[,mux=on|off]\n" |
1615 |
#else |
1616 |
"-chardev pty,id=id[,mux=on|off]\n" |
1617 |
"-chardev stdio,id=id[,mux=on|off][,signal=on|off]\n" |
1618 |
#endif |
1619 |
#ifdef CONFIG_BRLAPI |
1620 |
"-chardev braille,id=id[,mux=on|off]\n" |
1621 |
#endif |
1622 |
#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ |
1623 |
|| defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) |
1624 |
"-chardev tty,id=id,path=path[,mux=on|off]\n" |
1625 |
#endif |
1626 |
#if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) |
1627 |
"-chardev parport,id=id,path=path[,mux=on|off]\n" |
1628 |
#endif |
1629 |
#if defined(CONFIG_SPICE) |
1630 |
"-chardev spicevmc,id=id,name=name[,debug=debug]\n" |
1631 |
#endif |
1632 |
, QEMU_ARCH_ALL |
1633 |
) |
1634 |
|
1635 |
STEXI |
1636 |
|
1637 |
The general form of a character device option is: |
1638 |
@table @option |
1639 |
|
1640 |
@item -chardev @var{backend} ,id=@var{id} [,mux=on|off] [,@var{options}] |
1641 |
@findex -chardev |
1642 |
Backend is one of: |
1643 |
@option{null}, |
1644 |
@option{socket}, |
1645 |
@option{udp}, |
1646 |
@option{msmouse}, |
1647 |
@option{vc}, |
1648 |
@option{file}, |
1649 |
@option{pipe}, |
1650 |
@option{console}, |
1651 |
@option{serial}, |
1652 |
@option{pty}, |
1653 |
@option{stdio}, |
1654 |
@option{braille}, |
1655 |
@option{tty}, |
1656 |
@option{parport}, |
1657 |
@option{spicevmc}. |
1658 |
The specific backend will determine the applicable options. |
1659 |
|
1660 |
All devices must have an id, which can be any string up to 127 characters long. |
1661 |
It is used to uniquely identify this device in other command line directives. |
1662 |
|
1663 |
A character device may be used in multiplexing mode by multiple front-ends. |
1664 |
The key sequence of @key{Control-a} and @key{c} will rotate the input focus |
1665 |
between attached front-ends. Specify @option{mux=on} to enable this mode. |
1666 |
|
1667 |
Options to each backend are described below. |
1668 |
|
1669 |
@item -chardev null ,id=@var{id} |
1670 |
A void device. This device will not emit any data, and will drop any data it |
1671 |
receives. The null backend does not take any options. |
1672 |
|
1673 |
@item -chardev socket ,id=@var{id} [@var{TCP options} or @var{unix options}] [,server] [,nowait] [,telnet] |
1674 |
|
1675 |
Create a two-way stream socket, which can be either a TCP or a unix socket. A |
1676 |
unix socket will be created if @option{path} is specified. Behaviour is |
1677 |
undefined if TCP options are specified for a unix socket. |
1678 |
|
1679 |
@option{server} specifies that the socket shall be a listening socket. |
1680 |
|
1681 |
@option{nowait} specifies that QEMU should not block waiting for a client to |
1682 |
connect to a listening socket. |
1683 |
|
1684 |
@option{telnet} specifies that traffic on the socket should interpret telnet |
1685 |
escape sequences. |
1686 |
|
1687 |
TCP and unix socket options are given below: |
1688 |
|
1689 |
@table @option |
1690 |
|
1691 |
@item TCP options: port=@var{port} [,host=@var{host}] [,to=@var{to}] [,ipv4] [,ipv6] [,nodelay] |
1692 |
|
1693 |
@option{host} for a listening socket specifies the local address to be bound. |
1694 |
For a connecting socket species the remote host to connect to. @option{host} is |
1695 |
optional for listening sockets. If not specified it defaults to @code{0.0.0.0}. |
1696 |
|
1697 |
@option{port} for a listening socket specifies the local port to be bound. For a |
1698 |
connecting socket specifies the port on the remote host to connect to. |
1699 |
@option{port} can be given as either a port number or a service name. |
1700 |
@option{port} is required. |
1701 |
|
1702 |
@option{to} is only relevant to listening sockets. If it is specified, and |
1703 |
@option{port} cannot be bound, QEMU will attempt to bind to subsequent ports up |
1704 |
to and including @option{to} until it succeeds. @option{to} must be specified |
1705 |
as a port number. |
1706 |
|
1707 |
@option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used. |
1708 |
If neither is specified the socket may use either protocol. |
1709 |
|
1710 |
@option{nodelay} disables the Nagle algorithm. |
1711 |
|
1712 |
@item unix options: path=@var{path} |
1713 |
|
1714 |
@option{path} specifies the local path of the unix socket. @option{path} is |
1715 |
required. |
1716 |
|
1717 |
@end table |
1718 |
|
1719 |
@item -chardev udp ,id=@var{id} [,host=@var{host}] ,port=@var{port} [,localaddr=@var{localaddr}] [,localport=@var{localport}] [,ipv4] [,ipv6] |
1720 |
|
1721 |
Sends all traffic from the guest to a remote host over UDP. |
1722 |
|
1723 |
@option{host} specifies the remote host to connect to. If not specified it |
1724 |
defaults to @code{localhost}. |
1725 |
|
1726 |
@option{port} specifies the port on the remote host to connect to. @option{port} |
1727 |
is required. |
1728 |
|
1729 |
@option{localaddr} specifies the local address to bind to. If not specified it |
1730 |
defaults to @code{0.0.0.0}. |
1731 |
|
1732 |
@option{localport} specifies the local port to bind to. If not specified any |
1733 |
available local port will be used. |
1734 |
|
1735 |
@option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used. |
1736 |
If neither is specified the device may use either protocol. |
1737 |
|
1738 |
@item -chardev msmouse ,id=@var{id} |
1739 |
|
1740 |
Forward QEMU's emulated msmouse events to the guest. @option{msmouse} does not |
1741 |
take any options. |
1742 |
|
1743 |
@item -chardev vc ,id=@var{id} [[,width=@var{width}] [,height=@var{height}]] [[,cols=@var{cols}] [,rows=@var{rows}]] |
1744 |
|
1745 |
Connect to a QEMU text console. @option{vc} may optionally be given a specific |
1746 |
size. |
1747 |
|
1748 |
@option{width} and @option{height} specify the width and height respectively of |
1749 |
the console, in pixels. |
1750 |
|
1751 |
@option{cols} and @option{rows} specify that the console be sized to fit a text |
1752 |
console with the given dimensions. |
1753 |
|
1754 |
@item -chardev file ,id=@var{id} ,path=@var{path} |
1755 |
|
1756 |
Log all traffic received from the guest to a file. |
1757 |
|
1758 |
@option{path} specifies the path of the file to be opened. This file will be |
1759 |
created if it does not already exist, and overwritten if it does. @option{path} |
1760 |
is required. |
1761 |
|
1762 |
@item -chardev pipe ,id=@var{id} ,path=@var{path} |
1763 |
|
1764 |
Create a two-way connection to the guest. The behaviour differs slightly between |
1765 |
Windows hosts and other hosts: |
1766 |
|
1767 |
On Windows, a single duplex pipe will be created at |
1768 |
@file{\\.pipe\@option{path}}. |
1769 |
|
1770 |
On other hosts, 2 pipes will be created called @file{@option{path}.in} and |
1771 |
@file{@option{path}.out}. Data written to @file{@option{path}.in} will be |
1772 |
received by the guest. Data written by the guest can be read from |
1773 |
@file{@option{path}.out}. QEMU will not create these fifos, and requires them to |
1774 |
be present. |
1775 |
|
1776 |
@option{path} forms part of the pipe path as described above. @option{path} is |
1777 |
required. |
1778 |
|
1779 |
@item -chardev console ,id=@var{id} |
1780 |
|
1781 |
Send traffic from the guest to QEMU's standard output. @option{console} does not |
1782 |
take any options. |
1783 |
|
1784 |
@option{console} is only available on Windows hosts. |
1785 |
|
1786 |
@item -chardev serial ,id=@var{id} ,path=@option{path} |
1787 |
|
1788 |
Send traffic from the guest to a serial device on the host. |
1789 |
|
1790 |
@option{serial} is |
1791 |
only available on Windows hosts. |
1792 |
|
1793 |
@option{path} specifies the name of the serial device to open. |
1794 |
|
1795 |
@item -chardev pty ,id=@var{id} |
1796 |
|
1797 |
Create a new pseudo-terminal on the host and connect to it. @option{pty} does |
1798 |
not take any options. |
1799 |
|
1800 |
@option{pty} is not available on Windows hosts. |
1801 |
|
1802 |
@item -chardev stdio ,id=@var{id} [,signal=on|off] |
1803 |
Connect to standard input and standard output of the QEMU process. |
1804 |
|
1805 |
@option{signal} controls if signals are enabled on the terminal, that includes |
1806 |
exiting QEMU with the key sequence @key{Control-c}. This option is enabled by |
1807 |
default, use @option{signal=off} to disable it. |
1808 |
|
1809 |
@option{stdio} is not available on Windows hosts. |
1810 |
|
1811 |
@item -chardev braille ,id=@var{id} |
1812 |
|
1813 |
Connect to a local BrlAPI server. @option{braille} does not take any options. |
1814 |
|
1815 |
@item -chardev tty ,id=@var{id} ,path=@var{path} |
1816 |
|
1817 |
Connect to a local tty device. |
1818 |
|
1819 |
@option{tty} is only available on Linux, Sun, FreeBSD, NetBSD, OpenBSD and |
1820 |
DragonFlyBSD hosts. |
1821 |
|
1822 |
@option{path} specifies the path to the tty. @option{path} is required. |
1823 |
|
1824 |
@item -chardev parport ,id=@var{id} ,path=@var{path} |
1825 |
|
1826 |
@option{parport} is only available on Linux, FreeBSD and DragonFlyBSD hosts. |
1827 |
|
1828 |
Connect to a local parallel port. |
1829 |
|
1830 |
@option{path} specifies the path to the parallel port device. @option{path} is |
1831 |
required. |
1832 |
|
1833 |
@item -chardev spicevmc ,id=@var{id} ,debug=@var{debug}, name=@var{name} |
1834 |
|
1835 |
@option{spicevmc} is only available when spice support is built in. |
1836 |
|
1837 |
@option{debug} debug level for spicevmc |
1838 |
|
1839 |
@option{name} name of spice channel to connect to |
1840 |
|
1841 |
Connect to a spice virtual machine channel, such as vdiport. |
1842 |
|
1843 |
@end table |
1844 |
ETEXI |
1845 |
|
1846 |
DEFHEADING() |
1847 |
|
1848 |
STEXI |
1849 |
DEFHEADING(Device URL Syntax:) |
1850 |
|
1851 |
In addition to using normal file images for the emulated storage devices, |
1852 |
QEMU can also use networked resources such as iSCSI devices. These are |
1853 |
specified using a special URL syntax. |
1854 |
|
1855 |
@table @option |
1856 |
@item iSCSI |
1857 |
iSCSI support allows QEMU to access iSCSI resources directly and use as |
1858 |
images for the guest storage. Both disk and cdrom images are supported. |
1859 |
|
1860 |
Syntax for specifying iSCSI LUNs is |
1861 |
``iscsi://<target-ip>[:<port>]/<target-iqn>/<lun>'' |
1862 |
|
1863 |
Example (without authentication): |
1864 |
@example |
1865 |
qemu-system-i386 -iscsi initiator-name=iqn.2001-04.com.example:my-initiator \ |
1866 |
-cdrom iscsi://192.0.2.1/iqn.2001-04.com.example/2 \ |
1867 |
-drive file=iscsi://192.0.2.1/iqn.2001-04.com.example/1 |
1868 |
@end example |
1869 |
|
1870 |
Example (CHAP username/password via URL): |
1871 |
@example |
1872 |
qemu-system-i386 -drive file=iscsi://user%password@@192.0.2.1/iqn.2001-04.com.example/1 |
1873 |
@end example |
1874 |
|
1875 |
Example (CHAP username/password via environment variables): |
1876 |
@example |
1877 |
LIBISCSI_CHAP_USERNAME="user" \ |
1878 |
LIBISCSI_CHAP_PASSWORD="password" \ |
1879 |
qemu-system-i386 -drive file=iscsi://192.0.2.1/iqn.2001-04.com.example/1 |
1880 |
@end example |
1881 |
|
1882 |
iSCSI support is an optional feature of QEMU and only available when |
1883 |
compiled and linked against libiscsi. |
1884 |
ETEXI |
1885 |
DEF("iscsi", HAS_ARG, QEMU_OPTION_iscsi, |
1886 |
"-iscsi [user=user][,password=password]\n" |
1887 |
" [,header-digest=CRC32C|CR32C-NONE|NONE-CRC32C|NONE\n" |
1888 |
" [,initiator-name=iqn]\n" |
1889 |
" iSCSI session parameters\n", QEMU_ARCH_ALL) |
1890 |
STEXI |
1891 |
|
1892 |
@item NBD |
1893 |
QEMU supports NBD (Network Block Devices) both using TCP protocol as well |
1894 |
as Unix Domain Sockets. |
1895 |
|
1896 |
Syntax for specifying a NBD device using TCP |
1897 |
``nbd:<server-ip>:<port>[:exportname=<export>]'' |
1898 |
|
1899 |
Syntax for specifying a NBD device using Unix Domain Sockets |
1900 |
``nbd:unix:<domain-socket>[:exportname=<export>]'' |
1901 |
|
1902 |
|
1903 |
Example for TCP |
1904 |
@example |
1905 |
qemu-system-i386 --drive file=nbd:192.0.2.1:30000 |
1906 |
@end example |
1907 |
|
1908 |
Example for Unix Domain Sockets |
1909 |
@example |
1910 |
qemu-system-i386 --drive file=nbd:unix:/tmp/nbd-socket |
1911 |
@end example |
1912 |
|
1913 |
@item Sheepdog |
1914 |
Sheepdog is a distributed storage system for QEMU. |
1915 |
QEMU supports using either local sheepdog devices or remote networked |
1916 |
devices. |
1917 |
|
1918 |
Syntax for specifying a sheepdog device |
1919 |
@table @list |
1920 |
``sheepdog:<vdiname>'' |
1921 |
|
1922 |
``sheepdog:<vdiname>:<snapid>'' |
1923 |
|
1924 |
``sheepdog:<vdiname>:<tag>'' |
1925 |
|
1926 |
``sheepdog:<host>:<port>:<vdiname>'' |
1927 |
|
1928 |
``sheepdog:<host>:<port>:<vdiname>:<snapid>'' |
1929 |
|
1930 |
``sheepdog:<host>:<port>:<vdiname>:<tag>'' |
1931 |
@end table |
1932 |
|
1933 |
Example |
1934 |
@example |
1935 |
qemu-system-i386 --drive file=sheepdog:192.0.2.1:30000:MyVirtualMachine |
1936 |
@end example |
1937 |
|
1938 |
See also @url{http://http://www.osrg.net/sheepdog/}. |
1939 |
|
1940 |
@end table |
1941 |
ETEXI |
1942 |
|
1943 |
DEFHEADING(Bluetooth(R) options:) |
1944 |
|
1945 |
DEF("bt", HAS_ARG, QEMU_OPTION_bt, \ |
1946 |
"-bt hci,null dumb bluetooth HCI - doesn't respond to commands\n" \ |
1947 |
"-bt hci,host[:id]\n" \ |
1948 |
" use host's HCI with the given name\n" \ |
1949 |
"-bt hci[,vlan=n]\n" \ |
1950 |
" emulate a standard HCI in virtual scatternet 'n'\n" \ |
1951 |
"-bt vhci[,vlan=n]\n" \ |
1952 |
" add host computer to virtual scatternet 'n' using VHCI\n" \ |
1953 |
"-bt device:dev[,vlan=n]\n" \ |
1954 |
" emulate a bluetooth device 'dev' in scatternet 'n'\n", |
1955 |
QEMU_ARCH_ALL) |
1956 |
STEXI |
1957 |
@table @option |
1958 |
|
1959 |
@item -bt hci[...] |
1960 |
@findex -bt |
1961 |
Defines the function of the corresponding Bluetooth HCI. -bt options |
1962 |
are matched with the HCIs present in the chosen machine type. For |
1963 |
example when emulating a machine with only one HCI built into it, only |
1964 |
the first @code{-bt hci[...]} option is valid and defines the HCI's |
1965 |
logic. The Transport Layer is decided by the machine type. Currently |
1966 |
the machines @code{n800} and @code{n810} have one HCI and all other |
1967 |
machines have none. |
1968 |
|
1969 |
@anchor{bt-hcis} |
1970 |
The following three types are recognized: |
1971 |
|
1972 |
@table @option |
1973 |
@item -bt hci,null |
1974 |
(default) The corresponding Bluetooth HCI assumes no internal logic |
1975 |
and will not respond to any HCI commands or emit events. |
1976 |
|
1977 |
@item -bt hci,host[:@var{id}] |
1978 |
(@code{bluez} only) The corresponding HCI passes commands / events |
1979 |
to / from the physical HCI identified by the name @var{id} (default: |
1980 |
@code{hci0}) on the computer running QEMU. Only available on @code{bluez} |
1981 |
capable systems like Linux. |
1982 |
|
1983 |
@item -bt hci[,vlan=@var{n}] |
1984 |
Add a virtual, standard HCI that will participate in the Bluetooth |
1985 |
scatternet @var{n} (default @code{0}). Similarly to @option{-net} |
1986 |
VLANs, devices inside a bluetooth network @var{n} can only communicate |
1987 |
with other devices in the same network (scatternet). |
1988 |
@end table |
1989 |
|
1990 |
@item -bt vhci[,vlan=@var{n}] |
1991 |
(Linux-host only) Create a HCI in scatternet @var{n} (default 0) attached |
1992 |
to the host bluetooth stack instead of to the emulated target. This |
1993 |
allows the host and target machines to participate in a common scatternet |
1994 |
and communicate. Requires the Linux @code{vhci} driver installed. Can |
1995 |
be used as following: |
1996 |
|
1997 |
@example |
1998 |
qemu-system-i386 [...OPTIONS...] -bt hci,vlan=5 -bt vhci,vlan=5 |
1999 |
@end example |
2000 |
|
2001 |
@item -bt device:@var{dev}[,vlan=@var{n}] |
2002 |
Emulate a bluetooth device @var{dev} and place it in network @var{n} |
2003 |
(default @code{0}). QEMU can only emulate one type of bluetooth devices |
2004 |
currently: |
2005 |
|
2006 |
@table @option |
2007 |
@item keyboard |
2008 |
Virtual wireless keyboard implementing the HIDP bluetooth profile. |
2009 |
@end table |
2010 |
@end table |
2011 |
ETEXI |
2012 |
|
2013 |
DEFHEADING() |
2014 |
|
2015 |
DEFHEADING(Linux/Multiboot boot specific:) |
2016 |
STEXI |
2017 |
|
2018 |
When using these options, you can use a given Linux or Multiboot |
2019 |
kernel without installing it in the disk image. It can be useful |
2020 |
for easier testing of various kernels. |
2021 |
|
2022 |
@table @option |
2023 |
ETEXI |
2024 |
|
2025 |
DEF("kernel", HAS_ARG, QEMU_OPTION_kernel, \ |
2026 |
"-kernel bzImage use 'bzImage' as kernel image\n", QEMU_ARCH_ALL) |
2027 |
STEXI |
2028 |
@item -kernel @var{bzImage} |
2029 |
@findex -kernel |
2030 |
Use @var{bzImage} as kernel image. The kernel can be either a Linux kernel |
2031 |
or in multiboot format. |
2032 |
ETEXI |
2033 |
|
2034 |
DEF("append", HAS_ARG, QEMU_OPTION_append, \ |
2035 |
"-append cmdline use 'cmdline' as kernel command line\n", QEMU_ARCH_ALL) |
2036 |
STEXI |
2037 |
@item -append @var{cmdline} |
2038 |
@findex -append |
2039 |
Use @var{cmdline} as kernel command line |
2040 |
ETEXI |
2041 |
|
2042 |
DEF("initrd", HAS_ARG, QEMU_OPTION_initrd, \ |
2043 |
"-initrd file use 'file' as initial ram disk\n", QEMU_ARCH_ALL) |
2044 |
STEXI |
2045 |
@item -initrd @var{file} |
2046 |
@findex -initrd |
2047 |
Use @var{file} as initial ram disk. |
2048 |
|
2049 |
@item -initrd "@var{file1} arg=foo,@var{file2}" |
2050 |
|
2051 |
This syntax is only available with multiboot. |
2052 |
|
2053 |
Use @var{file1} and @var{file2} as modules and pass arg=foo as parameter to the |
2054 |
first module. |
2055 |
ETEXI |
2056 |
|
2057 |
DEF("dtb", HAS_ARG, QEMU_OPTION_dtb, \ |
2058 |
"-dtb file use 'file' as device tree image\n", QEMU_ARCH_ALL) |
2059 |
STEXI |
2060 |
@item -dtb @var{file} |
2061 |
@findex -dtb |
2062 |
Use @var{file} as a device tree binary (dtb) image and pass it to the kernel |
2063 |
on boot. |
2064 |
ETEXI |
2065 |
|
2066 |
STEXI |
2067 |
@end table |
2068 |
ETEXI |
2069 |
|
2070 |
DEFHEADING() |
2071 |
|
2072 |
DEFHEADING(Debug/Expert options:) |
2073 |
|
2074 |
STEXI |
2075 |
@table @option |
2076 |
ETEXI |
2077 |
|
2078 |
DEF("serial", HAS_ARG, QEMU_OPTION_serial, \ |
2079 |
"-serial dev redirect the serial port to char device 'dev'\n", |
2080 |
QEMU_ARCH_ALL) |
2081 |
STEXI |
2082 |
@item -serial @var{dev} |
2083 |
@findex -serial |
2084 |
Redirect the virtual serial port to host character device |
2085 |
@var{dev}. The default device is @code{vc} in graphical mode and |
2086 |
@code{stdio} in non graphical mode. |
2087 |
|
2088 |
This option can be used several times to simulate up to 4 serial |
2089 |
ports. |
2090 |
|
2091 |
Use @code{-serial none} to disable all serial ports. |
2092 |
|
2093 |
Available character devices are: |
2094 |
@table @option |
2095 |
@item vc[:@var{W}x@var{H}] |
2096 |
Virtual console. Optionally, a width and height can be given in pixel with |
2097 |
@example |
2098 |
vc:800x600 |
2099 |
@end example |
2100 |
It is also possible to specify width or height in characters: |
2101 |
@example |
2102 |
vc:80Cx24C |
2103 |
@end example |
2104 |
@item pty |
2105 |
[Linux only] Pseudo TTY (a new PTY is automatically allocated) |
2106 |
@item none |
2107 |
No device is allocated. |
2108 |
@item null |
2109 |
void device |
2110 |
@item /dev/XXX |
2111 |
[Linux only] Use host tty, e.g. @file{/dev/ttyS0}. The host serial port |
2112 |
parameters are set according to the emulated ones. |
2113 |
@item /dev/parport@var{N} |
2114 |
[Linux only, parallel port only] Use host parallel port |
2115 |
@var{N}. Currently SPP and EPP parallel port features can be used. |
2116 |
@item file:@var{filename} |
2117 |
Write output to @var{filename}. No character can be read. |
2118 |
@item stdio |
2119 |
[Unix only] standard input/output |
2120 |
@item pipe:@var{filename} |
2121 |
name pipe @var{filename} |
2122 |
@item COM@var{n} |
2123 |
[Windows only] Use host serial port @var{n} |
2124 |
@item udp:[@var{remote_host}]:@var{remote_port}[@@[@var{src_ip}]:@var{src_port}] |
2125 |
This implements UDP Net Console. |
2126 |
When @var{remote_host} or @var{src_ip} are not specified |
2127 |
they default to @code{0.0.0.0}. |
2128 |
When not using a specified @var{src_port} a random port is automatically chosen. |
2129 |
|
2130 |
If you just want a simple readonly console you can use @code{netcat} or |
2131 |
@code{nc}, by starting QEMU with: @code{-serial udp::4555} and nc as: |
2132 |
@code{nc -u -l -p 4555}. Any time QEMU writes something to that port it |
2133 |
will appear in the netconsole session. |
2134 |
|
2135 |
If you plan to send characters back via netconsole or you want to stop |
2136 |
and start QEMU a lot of times, you should have QEMU use the same |
2137 |
source port each time by using something like @code{-serial |
2138 |
udp::4555@@:4556} to QEMU. Another approach is to use a patched |
2139 |
version of netcat which can listen to a TCP port and send and receive |
2140 |
characters via udp. If you have a patched version of netcat which |
2141 |
activates telnet remote echo and single char transfer, then you can |
2142 |
use the following options to step up a netcat redirector to allow |
2143 |
telnet on port 5555 to access the QEMU port. |
2144 |
@table @code |
2145 |
@item QEMU Options: |
2146 |
-serial udp::4555@@:4556 |
2147 |
@item netcat options: |
2148 |
-u -P 4555 -L 0.0.0.0:4556 -t -p 5555 -I -T |
2149 |
@item telnet options: |
2150 |
localhost 5555 |
2151 |
@end table |
2152 |
|
2153 |
@item tcp:[@var{host}]:@var{port}[,@var{server}][,nowait][,nodelay] |
2154 |
The TCP Net Console has two modes of operation. It can send the serial |
2155 |
I/O to a location or wait for a connection from a location. By default |
2156 |
the TCP Net Console is sent to @var{host} at the @var{port}. If you use |
2157 |
the @var{server} option QEMU will wait for a client socket application |
2158 |
to connect to the port before continuing, unless the @code{nowait} |
2159 |
option was specified. The @code{nodelay} option disables the Nagle buffering |
2160 |
algorithm. If @var{host} is omitted, 0.0.0.0 is assumed. Only |
2161 |
one TCP connection at a time is accepted. You can use @code{telnet} to |
2162 |
connect to the corresponding character device. |
2163 |
@table @code |
2164 |
@item Example to send tcp console to 192.168.0.2 port 4444 |
2165 |
-serial tcp:192.168.0.2:4444 |
2166 |
@item Example to listen and wait on port 4444 for connection |
2167 |
-serial tcp::4444,server |
2168 |
@item Example to not wait and listen on ip 192.168.0.100 port 4444 |
2169 |
-serial tcp:192.168.0.100:4444,server,nowait |
2170 |
@end table |
2171 |
|
2172 |
@item telnet:@var{host}:@var{port}[,server][,nowait][,nodelay] |
2173 |
The telnet protocol is used instead of raw tcp sockets. The options |
2174 |
work the same as if you had specified @code{-serial tcp}. The |
2175 |
difference is that the port acts like a telnet server or client using |
2176 |
telnet option negotiation. This will also allow you to send the |
2177 |
MAGIC_SYSRQ sequence if you use a telnet that supports sending the break |
2178 |
sequence. Typically in unix telnet you do it with Control-] and then |
2179 |
type "send break" followed by pressing the enter key. |
2180 |
|
2181 |
@item unix:@var{path}[,server][,nowait] |
2182 |
A unix domain socket is used instead of a tcp socket. The option works the |
2183 |
same as if you had specified @code{-serial tcp} except the unix domain socket |
2184 |
@var{path} is used for connections. |
2185 |
|
2186 |
@item mon:@var{dev_string} |
2187 |
This is a special option to allow the monitor to be multiplexed onto |
2188 |
another serial port. The monitor is accessed with key sequence of |
2189 |
@key{Control-a} and then pressing @key{c}. See monitor access |
2190 |
@ref{pcsys_keys} in the -nographic section for more keys. |
2191 |
@var{dev_string} should be any one of the serial devices specified |
2192 |
above. An example to multiplex the monitor onto a telnet server |
2193 |
listening on port 4444 would be: |
2194 |
@table @code |
2195 |
@item -serial mon:telnet::4444,server,nowait |
2196 |
@end table |
2197 |
|
2198 |
@item braille |
2199 |
Braille device. This will use BrlAPI to display the braille output on a real |
2200 |
or fake device. |
2201 |
|
2202 |
@item msmouse |
2203 |
Three button serial mouse. Configure the guest to use Microsoft protocol. |
2204 |
@end table |
2205 |
ETEXI |
2206 |
|
2207 |
DEF("parallel", HAS_ARG, QEMU_OPTION_parallel, \ |
2208 |
"-parallel dev redirect the parallel port to char device 'dev'\n", |
2209 |
QEMU_ARCH_ALL) |
2210 |
STEXI |
2211 |
@item -parallel @var{dev} |
2212 |
@findex -parallel |
2213 |
Redirect the virtual parallel port to host device @var{dev} (same |
2214 |
devices as the serial port). On Linux hosts, @file{/dev/parportN} can |
2215 |
be used to use hardware devices connected on the corresponding host |
2216 |
parallel port. |
2217 |
|
2218 |
This option can be used several times to simulate up to 3 parallel |
2219 |
ports. |
2220 |
|
2221 |
Use @code{-parallel none} to disable all parallel ports. |
2222 |
ETEXI |
2223 |
|
2224 |
DEF("monitor", HAS_ARG, QEMU_OPTION_monitor, \ |
2225 |
"-monitor dev redirect the monitor to char device 'dev'\n", |
2226 |
QEMU_ARCH_ALL) |
2227 |
STEXI |
2228 |
@item -monitor @var{dev} |
2229 |
@findex -monitor |
2230 |
Redirect the monitor to host device @var{dev} (same devices as the |
2231 |
serial port). |
2232 |
The default device is @code{vc} in graphical mode and @code{stdio} in |
2233 |
non graphical mode. |
2234 |
ETEXI |
2235 |
DEF("qmp", HAS_ARG, QEMU_OPTION_qmp, \ |
2236 |
"-qmp dev like -monitor but opens in 'control' mode\n", |
2237 |
QEMU_ARCH_ALL) |
2238 |
STEXI |
2239 |
@item -qmp @var{dev} |
2240 |
@findex -qmp |
2241 |
Like -monitor but opens in 'control' mode. |
2242 |
ETEXI |
2243 |
|
2244 |
DEF("mon", HAS_ARG, QEMU_OPTION_mon, \ |
2245 |
"-mon chardev=[name][,mode=readline|control][,default]\n", QEMU_ARCH_ALL) |
2246 |
STEXI |
2247 |
@item -mon chardev=[name][,mode=readline|control][,default] |
2248 |
@findex -mon |
2249 |
Setup monitor on chardev @var{name}. |
2250 |
ETEXI |
2251 |
|
2252 |
DEF("debugcon", HAS_ARG, QEMU_OPTION_debugcon, \ |
2253 |
"-debugcon dev redirect the debug console to char device 'dev'\n", |
2254 |
QEMU_ARCH_ALL) |
2255 |
STEXI |
2256 |
@item -debugcon @var{dev} |
2257 |
@findex -debugcon |
2258 |
Redirect the debug console to host device @var{dev} (same devices as the |
2259 |
serial port). The debug console is an I/O port which is typically port |
2260 |
0xe9; writing to that I/O port sends output to this device. |
2261 |
The default device is @code{vc} in graphical mode and @code{stdio} in |
2262 |
non graphical mode. |
2263 |
ETEXI |
2264 |
|
2265 |
DEF("pidfile", HAS_ARG, QEMU_OPTION_pidfile, \ |
2266 |
"-pidfile file write PID to 'file'\n", QEMU_ARCH_ALL) |
2267 |
STEXI |
2268 |
@item -pidfile @var{file} |
2269 |
@findex -pidfile |
2270 |
Store the QEMU process PID in @var{file}. It is useful if you launch QEMU |
2271 |
from a script. |
2272 |
ETEXI |
2273 |
|
2274 |
DEF("singlestep", 0, QEMU_OPTION_singlestep, \ |
2275 |
"-singlestep always run in singlestep mode\n", QEMU_ARCH_ALL) |
2276 |
STEXI |
2277 |
@item -singlestep |
2278 |
@findex -singlestep |
2279 |
Run the emulation in single step mode. |
2280 |
ETEXI |
2281 |
|
2282 |
DEF("S", 0, QEMU_OPTION_S, \ |
2283 |
"-S freeze CPU at startup (use 'c' to start execution)\n", |
2284 |
QEMU_ARCH_ALL) |
2285 |
STEXI |
2286 |
@item -S |
2287 |
@findex -S |
2288 |
Do not start CPU at startup (you must type 'c' in the monitor). |
2289 |
ETEXI |
2290 |
|
2291 |
DEF("gdb", HAS_ARG, QEMU_OPTION_gdb, \ |
2292 |
"-gdb dev wait for gdb connection on 'dev'\n", QEMU_ARCH_ALL) |
2293 |
STEXI |
2294 |
@item -gdb @var{dev} |
2295 |
@findex -gdb |
2296 |
Wait for gdb connection on device @var{dev} (@pxref{gdb_usage}). Typical |
2297 |
connections will likely be TCP-based, but also UDP, pseudo TTY, or even |
2298 |
stdio are reasonable use case. The latter is allowing to start QEMU from |
2299 |
within gdb and establish the connection via a pipe: |
2300 |
@example |
2301 |
(gdb) target remote | exec qemu-system-i386 -gdb stdio ... |
2302 |
@end example |
2303 |
ETEXI |
2304 |
|
2305 |
DEF("s", 0, QEMU_OPTION_s, \ |
2306 |
"-s shorthand for -gdb tcp::" DEFAULT_GDBSTUB_PORT "\n", |
2307 |
QEMU_ARCH_ALL) |
2308 |
STEXI |
2309 |
@item -s |
2310 |
@findex -s |
2311 |
Shorthand for -gdb tcp::1234, i.e. open a gdbserver on TCP port 1234 |
2312 |
(@pxref{gdb_usage}). |
2313 |
ETEXI |
2314 |
|
2315 |
DEF("d", HAS_ARG, QEMU_OPTION_d, \ |
2316 |
"-d item1,... output log to /tmp/qemu.log (use -d ? for a list of log items)\n", |
2317 |
QEMU_ARCH_ALL) |
2318 |
STEXI |
2319 |
@item -d |
2320 |
@findex -d |
2321 |
Output log in /tmp/qemu.log |
2322 |
ETEXI |
2323 |
|
2324 |
DEF("D", HAS_ARG, QEMU_OPTION_D, \ |
2325 |
"-D logfile output log to logfile (instead of the default /tmp/qemu.log)\n", |
2326 |
QEMU_ARCH_ALL) |
2327 |
STEXI |
2328 |
@item -D @var{logfile} |
2329 |
@findex -D |
2330 |
Output log in @var{logfile} instead of /tmp/qemu.log |
2331 |
ETEXI |
2332 |
|
2333 |
DEF("hdachs", HAS_ARG, QEMU_OPTION_hdachs, \ |
2334 |
"-hdachs c,h,s[,t]\n" \ |
2335 |
" force hard disk 0 physical geometry and the optional BIOS\n" \ |
2336 |
" translation (t=none or lba) (usually QEMU can guess them)\n", |
2337 |
QEMU_ARCH_ALL) |
2338 |
STEXI |
2339 |
@item -hdachs @var{c},@var{h},@var{s},[,@var{t}] |
2340 |
@findex -hdachs |
2341 |
Force hard disk 0 physical geometry (1 <= @var{c} <= 16383, 1 <= |
2342 |
@var{h} <= 16, 1 <= @var{s} <= 63) and optionally force the BIOS |
2343 |
translation mode (@var{t}=none, lba or auto). Usually QEMU can guess |
2344 |
all those parameters. This option is useful for old MS-DOS disk |
2345 |
images. |
2346 |
ETEXI |
2347 |
|
2348 |
DEF("L", HAS_ARG, QEMU_OPTION_L, \ |
2349 |
"-L path set the directory for the BIOS, VGA BIOS and keymaps\n", |
2350 |
QEMU_ARCH_ALL) |
2351 |
STEXI |
2352 |
@item -L @var{path} |
2353 |
@findex -L |
2354 |
Set the directory for the BIOS, VGA BIOS and keymaps. |
2355 |
ETEXI |
2356 |
|
2357 |
DEF("bios", HAS_ARG, QEMU_OPTION_bios, \ |
2358 |
"-bios file set the filename for the BIOS\n", QEMU_ARCH_ALL) |
2359 |
STEXI |
2360 |
@item -bios @var{file} |
2361 |
@findex -bios |
2362 |
Set the filename for the BIOS. |
2363 |
ETEXI |
2364 |
|
2365 |
DEF("enable-kvm", 0, QEMU_OPTION_enable_kvm, \ |
2366 |
"-enable-kvm enable KVM full virtualization support\n", QEMU_ARCH_ALL) |
2367 |
STEXI |
2368 |
@item -enable-kvm |
2369 |
@findex -enable-kvm |
2370 |
Enable KVM full virtualization support. This option is only available |
2371 |
if KVM support is enabled when compiling. |
2372 |
ETEXI |
2373 |
|
2374 |
DEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid, |
2375 |
"-xen-domid id specify xen guest domain id\n", QEMU_ARCH_ALL) |
2376 |
DEF("xen-create", 0, QEMU_OPTION_xen_create, |
2377 |
"-xen-create create domain using xen hypercalls, bypassing xend\n" |
2378 |
" warning: should not be used when xend is in use\n", |
2379 |
QEMU_ARCH_ALL) |
2380 |
DEF("xen-attach", 0, QEMU_OPTION_xen_attach, |
2381 |
"-xen-attach attach to existing xen domain\n" |
2382 |
" xend will use this when starting QEMU\n", |
2383 |
QEMU_ARCH_ALL) |
2384 |
STEXI |
2385 |
@item -xen-domid @var{id} |
2386 |
@findex -xen-domid |
2387 |
Specify xen guest domain @var{id} (XEN only). |
2388 |
@item -xen-create |
2389 |
@findex -xen-create |
2390 |
Create domain using xen hypercalls, bypassing xend. |
2391 |
Warning: should not be used when xend is in use (XEN only). |
2392 |
@item -xen-attach |
2393 |
@findex -xen-attach |
2394 |
Attach to existing xen domain. |
2395 |
xend will use this when starting QEMU (XEN only). |
2396 |
ETEXI |
2397 |
|
2398 |
DEF("no-reboot", 0, QEMU_OPTION_no_reboot, \ |
2399 |
"-no-reboot exit instead of rebooting\n", QEMU_ARCH_ALL) |
2400 |
STEXI |
2401 |
@item -no-reboot |
2402 |
@findex -no-reboot |
2403 |
Exit instead of rebooting. |
2404 |
ETEXI |
2405 |
|
2406 |
DEF("no-shutdown", 0, QEMU_OPTION_no_shutdown, \ |
2407 |
"-no-shutdown stop before shutdown\n", QEMU_ARCH_ALL) |
2408 |
STEXI |
2409 |
@item -no-shutdown |
2410 |
@findex -no-shutdown |
2411 |
Don't exit QEMU on guest shutdown, but instead only stop the emulation. |
2412 |
This allows for instance switching to monitor to commit changes to the |
2413 |
disk image. |
2414 |
ETEXI |
2415 |
|
2416 |
DEF("loadvm", HAS_ARG, QEMU_OPTION_loadvm, \ |
2417 |
"-loadvm [tag|id]\n" \ |
2418 |
" start right away with a saved state (loadvm in monitor)\n", |
2419 |
QEMU_ARCH_ALL) |
2420 |
STEXI |
2421 |
@item -loadvm @var{file} |
2422 |
@findex -loadvm |
2423 |
Start right away with a saved state (@code{loadvm} in monitor) |
2424 |
ETEXI |
2425 |
|
2426 |
#ifndef _WIN32 |
2427 |
DEF("daemonize", 0, QEMU_OPTION_daemonize, \ |
2428 |
"-daemonize daemonize QEMU after initializing\n", QEMU_ARCH_ALL) |
2429 |
#endif |
2430 |
STEXI |
2431 |
@item -daemonize |
2432 |
@findex -daemonize |
2433 |
Daemonize the QEMU process after initialization. QEMU will not detach from |
2434 |
standard IO until it is ready to receive connections on any of its devices. |
2435 |
This option is a useful way for external programs to launch QEMU without having |
2436 |
to cope with initialization race conditions. |
2437 |
ETEXI |
2438 |
|
2439 |
DEF("option-rom", HAS_ARG, QEMU_OPTION_option_rom, \ |
2440 |
"-option-rom rom load a file, rom, into the option ROM space\n", |
2441 |
QEMU_ARCH_ALL) |
2442 |
STEXI |
2443 |
@item -option-rom @var{file} |
2444 |
@findex -option-rom |
2445 |
Load the contents of @var{file} as an option ROM. |
2446 |
This option is useful to load things like EtherBoot. |
2447 |
ETEXI |
2448 |
|
2449 |
DEF("clock", HAS_ARG, QEMU_OPTION_clock, \ |
2450 |
"-clock force the use of the given methods for timer alarm.\n" \ |
2451 |
" To see what timers are available use -clock ?\n", |
2452 |
QEMU_ARCH_ALL) |
2453 |
STEXI |
2454 |
@item -clock @var{method} |
2455 |
@findex -clock |
2456 |
Force the use of the given methods for timer alarm. To see what timers |
2457 |
are available use -clock ?. |
2458 |
ETEXI |
2459 |
|
2460 |
HXCOMM Options deprecated by -rtc |
2461 |
DEF("localtime", 0, QEMU_OPTION_localtime, "", QEMU_ARCH_ALL) |
2462 |
DEF("startdate", HAS_ARG, QEMU_OPTION_startdate, "", QEMU_ARCH_ALL) |
2463 |
|
2464 |
DEF("rtc", HAS_ARG, QEMU_OPTION_rtc, \ |
2465 |
"-rtc [base=utc|localtime|date][,clock=host|rt|vm][,driftfix=none|slew]\n" \ |
2466 |
" set the RTC base and clock, enable drift fix for clock ticks (x86 only)\n", |
2467 |
QEMU_ARCH_ALL) |
2468 |
|
2469 |
STEXI |
2470 |
|
2471 |
@item -rtc [base=utc|localtime|@var{date}][,clock=host|vm][,driftfix=none|slew] |
2472 |
@findex -rtc |
2473 |
Specify @option{base} as @code{utc} or @code{localtime} to let the RTC start at the current |
2474 |
UTC or local time, respectively. @code{localtime} is required for correct date in |
2475 |
MS-DOS or Windows. To start at a specific point in time, provide @var{date} in the |
2476 |
format @code{2006-06-17T16:01:21} or @code{2006-06-17}. The default base is UTC. |
2477 |
|
2478 |
By default the RTC is driven by the host system time. This allows to use the |
2479 |
RTC as accurate reference clock inside the guest, specifically if the host |
2480 |
time is smoothly following an accurate external reference clock, e.g. via NTP. |
2481 |
If you want to isolate the guest time from the host, you can set @option{clock} |
2482 |
to @code{rt} instead. To even prevent it from progressing during suspension, |
2483 |
you can set it to @code{vm}. |
2484 |
|
2485 |
Enable @option{driftfix} (i386 targets only) if you experience time drift problems, |
2486 |
specifically with Windows' ACPI HAL. This option will try to figure out how |
2487 |
many timer interrupts were not processed by the Windows guest and will |
2488 |
re-inject them. |
2489 |
ETEXI |
2490 |
|
2491 |
DEF("icount", HAS_ARG, QEMU_OPTION_icount, \ |
2492 |
"-icount [N|auto]\n" \ |
2493 |
" enable virtual instruction counter with 2^N clock ticks per\n" \ |
2494 |
" instruction\n", QEMU_ARCH_ALL) |
2495 |
STEXI |
2496 |
@item -icount [@var{N}|auto] |
2497 |
@findex -icount |
2498 |
Enable virtual instruction counter. The virtual cpu will execute one |
2499 |
instruction every 2^@var{N} ns of virtual time. If @code{auto} is specified |
2500 |
then the virtual cpu speed will be automatically adjusted to keep virtual |
2501 |
time within a few seconds of real time. |
2502 |
|
2503 |
Note that while this option can give deterministic behavior, it does not |
2504 |
provide cycle accurate emulation. Modern CPUs contain superscalar out of |
2505 |
order cores with complex cache hierarchies. The number of instructions |
2506 |
executed often has little or no correlation with actual performance. |
2507 |
ETEXI |
2508 |
|
2509 |
DEF("watchdog", HAS_ARG, QEMU_OPTION_watchdog, \ |
2510 |
"-watchdog i6300esb|ib700\n" \ |
2511 |
" enable virtual hardware watchdog [default=none]\n", |
2512 |
QEMU_ARCH_ALL) |
2513 |
STEXI |
2514 |
@item -watchdog @var{model} |
2515 |
@findex -watchdog |
2516 |
Create a virtual hardware watchdog device. Once enabled (by a guest |
2517 |
action), the watchdog must be periodically polled by an agent inside |
2518 |
the guest or else the guest will be restarted. |
2519 |
|
2520 |
The @var{model} is the model of hardware watchdog to emulate. Choices |
2521 |
for model are: @code{ib700} (iBASE 700) which is a very simple ISA |
2522 |
watchdog with a single timer, or @code{i6300esb} (Intel 6300ESB I/O |
2523 |
controller hub) which is a much more featureful PCI-based dual-timer |
2524 |
watchdog. Choose a model for which your guest has drivers. |
2525 |
|
2526 |
Use @code{-watchdog ?} to list available hardware models. Only one |
2527 |
watchdog can be enabled for a guest. |
2528 |
ETEXI |
2529 |
|
2530 |
DEF("watchdog-action", HAS_ARG, QEMU_OPTION_watchdog_action, \ |
2531 |
"-watchdog-action reset|shutdown|poweroff|pause|debug|none\n" \ |
2532 |
" action when watchdog fires [default=reset]\n", |
2533 |
QEMU_ARCH_ALL) |
2534 |
STEXI |
2535 |
@item -watchdog-action @var{action} |
2536 |
|
2537 |
The @var{action} controls what QEMU will do when the watchdog timer |
2538 |
expires. |
2539 |
The default is |
2540 |
@code{reset} (forcefully reset the guest). |
2541 |
Other possible actions are: |
2542 |
@code{shutdown} (attempt to gracefully shutdown the guest), |
2543 |
@code{poweroff} (forcefully poweroff the guest), |
2544 |
@code{pause} (pause the guest), |
2545 |
@code{debug} (print a debug message and continue), or |
2546 |
@code{none} (do nothing). |
2547 |
|
2548 |
Note that the @code{shutdown} action requires that the guest responds |
2549 |
to ACPI signals, which it may not be able to do in the sort of |
2550 |
situations where the watchdog would have expired, and thus |
2551 |
@code{-watchdog-action shutdown} is not recommended for production use. |
2552 |
|
2553 |
Examples: |
2554 |
|
2555 |
@table @code |
2556 |
@item -watchdog i6300esb -watchdog-action pause |
2557 |
@item -watchdog ib700 |
2558 |
@end table |
2559 |
ETEXI |
2560 |
|
2561 |
DEF("echr", HAS_ARG, QEMU_OPTION_echr, \ |
2562 |
"-echr chr set terminal escape character instead of ctrl-a\n", |
2563 |
QEMU_ARCH_ALL) |
2564 |
STEXI |
2565 |
|
2566 |
@item -echr @var{numeric_ascii_value} |
2567 |
@findex -echr |
2568 |
Change the escape character used for switching to the monitor when using |
2569 |
monitor and serial sharing. The default is @code{0x01} when using the |
2570 |
@code{-nographic} option. @code{0x01} is equal to pressing |
2571 |
@code{Control-a}. You can select a different character from the ascii |
2572 |
control keys where 1 through 26 map to Control-a through Control-z. For |
2573 |
instance you could use the either of the following to change the escape |
2574 |
character to Control-t. |
2575 |
@table @code |
2576 |
@item -echr 0x14 |
2577 |
@item -echr 20 |
2578 |
@end table |
2579 |
ETEXI |
2580 |
|
2581 |
DEF("virtioconsole", HAS_ARG, QEMU_OPTION_virtiocon, \ |
2582 |
"-virtioconsole c\n" \ |
2583 |
" set virtio console\n", QEMU_ARCH_ALL) |
2584 |
STEXI |
2585 |
@item -virtioconsole @var{c} |
2586 |
@findex -virtioconsole |
2587 |
Set virtio console. |
2588 |
|
2589 |
This option is maintained for backward compatibility. |
2590 |
|
2591 |
Please use @code{-device virtconsole} for the new way of invocation. |
2592 |
ETEXI |
2593 |
|
2594 |
DEF("show-cursor", 0, QEMU_OPTION_show_cursor, \ |
2595 |
"-show-cursor show cursor\n", QEMU_ARCH_ALL) |
2596 |
STEXI |
2597 |
@item -show-cursor |
2598 |
@findex -show-cursor |
2599 |
Show cursor. |
2600 |
ETEXI |
2601 |
|
2602 |
DEF("tb-size", HAS_ARG, QEMU_OPTION_tb_size, \ |
2603 |
"-tb-size n set TB size\n", QEMU_ARCH_ALL) |
2604 |
STEXI |
2605 |
@item -tb-size @var{n} |
2606 |
@findex -tb-size |
2607 |
Set TB size. |
2608 |
ETEXI |
2609 |
|
2610 |
DEF("incoming", HAS_ARG, QEMU_OPTION_incoming, \ |
2611 |
"-incoming p prepare for incoming migration, listen on port p\n", |
2612 |
QEMU_ARCH_ALL) |
2613 |
STEXI |
2614 |
@item -incoming @var{port} |
2615 |
@findex -incoming |
2616 |
Prepare for incoming migration, listen on @var{port}. |
2617 |
ETEXI |
2618 |
|
2619 |
DEF("nodefaults", 0, QEMU_OPTION_nodefaults, \ |
2620 |
"-nodefaults don't create default devices\n", QEMU_ARCH_ALL) |
2621 |
STEXI |
2622 |
@item -nodefaults |
2623 |
@findex -nodefaults |
2624 |
Don't create default devices. |
2625 |
ETEXI |
2626 |
|
2627 |
#ifndef _WIN32 |
2628 |
DEF("chroot", HAS_ARG, QEMU_OPTION_chroot, \ |
2629 |
"-chroot dir chroot to dir just before starting the VM\n", |
2630 |
QEMU_ARCH_ALL) |
2631 |
#endif |
2632 |
STEXI |
2633 |
@item -chroot @var{dir} |
2634 |
@findex -chroot |
2635 |
Immediately before starting guest execution, chroot to the specified |
2636 |
directory. Especially useful in combination with -runas. |
2637 |
ETEXI |
2638 |
|
2639 |
#ifndef _WIN32 |
2640 |
DEF("runas", HAS_ARG, QEMU_OPTION_runas, \ |
2641 |
"-runas user change to user id user just before starting the VM\n", |
2642 |
QEMU_ARCH_ALL) |
2643 |
#endif |
2644 |
STEXI |
2645 |
@item -runas @var{user} |
2646 |
@findex -runas |
2647 |
Immediately before starting guest execution, drop root privileges, switching |
2648 |
to the specified user. |
2649 |
ETEXI |
2650 |
|
2651 |
DEF("prom-env", HAS_ARG, QEMU_OPTION_prom_env, |
2652 |
"-prom-env variable=value\n" |
2653 |
" set OpenBIOS nvram variables\n", |
2654 |
QEMU_ARCH_PPC | QEMU_ARCH_SPARC) |
2655 |
STEXI |
2656 |
@item -prom-env @var{variable}=@var{value} |
2657 |
@findex -prom-env |
2658 |
Set OpenBIOS nvram @var{variable} to given @var{value} (PPC, SPARC only). |
2659 |
ETEXI |
2660 |
DEF("semihosting", 0, QEMU_OPTION_semihosting, |
2661 |
"-semihosting semihosting mode\n", QEMU_ARCH_ARM | QEMU_ARCH_M68K | QEMU_ARCH_XTENSA) |
2662 |
STEXI |
2663 |
@item -semihosting |
2664 |
@findex -semihosting |
2665 |
Semihosting mode (ARM, M68K, Xtensa only). |
2666 |
ETEXI |
2667 |
DEF("old-param", 0, QEMU_OPTION_old_param, |
2668 |
"-old-param old param mode\n", QEMU_ARCH_ARM) |
2669 |
STEXI |
2670 |
@item -old-param |
2671 |
@findex -old-param (ARM) |
2672 |
Old param mode (ARM only). |
2673 |
ETEXI |
2674 |
|
2675 |
DEF("readconfig", HAS_ARG, QEMU_OPTION_readconfig, |
2676 |
"-readconfig <file>\n", QEMU_ARCH_ALL) |
2677 |
STEXI |
2678 |
@item -readconfig @var{file} |
2679 |
@findex -readconfig |
2680 |
Read device configuration from @var{file}. |
2681 |
ETEXI |
2682 |
DEF("writeconfig", HAS_ARG, QEMU_OPTION_writeconfig, |
2683 |
"-writeconfig <file>\n" |
2684 |
" read/write config file\n", QEMU_ARCH_ALL) |
2685 |
STEXI |
2686 |
@item -writeconfig @var{file} |
2687 |
@findex -writeconfig |
2688 |
Write device configuration to @var{file}. |
2689 |
ETEXI |
2690 |
DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig, |
2691 |
"-nodefconfig\n" |
2692 |
" do not load default config files at startup\n", |
2693 |
QEMU_ARCH_ALL) |
2694 |
STEXI |
2695 |
@item -nodefconfig |
2696 |
@findex -nodefconfig |
2697 |
Normally QEMU loads configuration files from @var{sysconfdir} and @var{datadir} at startup. |
2698 |
The @code{-nodefconfig} option will prevent QEMU from loading any of those config files. |
2699 |
ETEXI |
2700 |
DEF("no-user-config", 0, QEMU_OPTION_nouserconfig, |
2701 |
"-no-user-config\n" |
2702 |
" do not load user-provided config files at startup\n", |
2703 |
QEMU_ARCH_ALL) |
2704 |
STEXI |
2705 |
@item -no-user-config |
2706 |
@findex -no-user-config |
2707 |
The @code{-no-user-config} option makes QEMU not load any of the user-provided |
2708 |
config files on @var{sysconfdir}, but won't make it skip the QEMU-provided config |
2709 |
files from @var{datadir}. |
2710 |
ETEXI |
2711 |
DEF("trace", HAS_ARG, QEMU_OPTION_trace, |
2712 |
"-trace [events=<file>][,file=<file>]\n" |
2713 |
" specify tracing options\n", |
2714 |
QEMU_ARCH_ALL) |
2715 |
STEXI |
2716 |
HXCOMM This line is not accurate, as some sub-options are backend-specific but |
2717 |
HXCOMM HX does not support conditional compilation of text. |
2718 |
@item -trace [events=@var{file}][,file=@var{file}] |
2719 |
@findex -trace |
2720 |
|
2721 |
Specify tracing options. |
2722 |
|
2723 |
@table @option |
2724 |
@item events=@var{file} |
2725 |
Immediately enable events listed in @var{file}. |
2726 |
The file must contain one event name (as listed in the @var{trace-events} file) |
2727 |
per line. |
2728 |
This option is only available if QEMU has been compiled with |
2729 |
either @var{simple} or @var{stderr} tracing backend. |
2730 |
@item file=@var{file} |
2731 |
Log output traces to @var{file}. |
2732 |
|
2733 |
This option is only available if QEMU has been compiled with |
2734 |
the @var{simple} tracing backend. |
2735 |
@end table |
2736 |
ETEXI |
2737 |
|
2738 |
DEF("qtest", HAS_ARG, QEMU_OPTION_qtest, |
2739 |
"-qtest CHR specify tracing options\n", |
2740 |
QEMU_ARCH_ALL) |
2741 |
|
2742 |
DEF("qtest-log", HAS_ARG, QEMU_OPTION_qtest_log, |
2743 |
"-qtest-log LOG specify tracing options\n", |
2744 |
QEMU_ARCH_ALL) |
2745 |
|
2746 |
HXCOMM This is the last statement. Insert new options before this line! |
2747 |
STEXI |
2748 |
@end table |
2749 |
ETEXI |