QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c) 2003-2008 Fabrice Bellard
usage: qemu [options] [disk_image]

'disk_image' is a raw hard image image for IDE hard disk 0

Standard options:
-h or -help     display this help and exit
-version        display version information and exit
-M machine      select emulated machine (-M ? for list)
-cpu cpu        select CPU (-cpu ? for list)
-smp n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]
                set the number of CPUs to 'n' [default=1]
                maxcpus= maximum number of total cpus, including
                  offline CPUs for hotplug etc.
                cores= number of CPU cores on one socket
                threads= number of threads on one CPU core
                sockets= number of discrete sockets in the system
-numa node[,mem=size][,cpus=cpu[-cpu]][,nodeid=node]
-fda/-fdb file  use 'file' as floppy disk 0/1 image
-hda/-hdb file  use 'file' as IDE hard disk 0/1 image
-hdc/-hdd file  use 'file' as IDE hard disk 2/3 image
-cdrom file     use 'file' as IDE cdrom image (cdrom is ide1 master)
-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]
       [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]
       [,cache=writethrough|writeback|none][,format=f][,serial=s]
       [,addr=A][,id=name][,aio=threads|native]
       [,boot=on|off]
                use 'file' as a drive image
-set group.id.arg=value
                set <arg> parameter for item <id> of type <group>
                i.e. -set drive.$id.file=/path/to/image
-global driver.property=value
                set a global default for a driver property
-mtdblock file  use 'file' as on-board Flash memory image
-sd file        use 'file' as SecureDigital card image
-pflash file    use 'file' as a parallel flash image
-boot [order=drives][,once=drives][,menu=on|off]
                'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)
-snapshot       write to temporary files instead of disk image files
-m megs         set virtual RAM size to megs MB [default=128]
-k language     use keyboard layout (for example 'fr' for French)
-audio-help     print list of audio drivers and their options
-soundhw c1,... enable audio support
                and only specified sound cards (comma separated list)
                use -soundhw ? to get the list of supported cards
                use -soundhw all to enable all of them
-usb            enable the USB driver (will be the default soon)
-usbdevice name add the host or guest USB device 'name'
-device driver[,options]  add device
-name string1[,process=string2]    set the name of the guest
            string1 sets the window title and string2 the process name (on Linux)
-uuid %08x-%04x-%04x-%04x-%012x
                specify machine UUID

Display options:
-nographic      disable graphical output and redirect serial I/Os to console
-curses         use a curses/ncurses interface instead of SDL
-no-frame       open SDL window without a frame and window decorations
-alt-grab       use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)
-ctrl-grab       use Right-Ctrl to grab mouse (instead of Ctrl-Alt)
-no-quit        disable SDL window close capability
-sdl            enable SDL
-portrait       rotate graphical output 90 deg left (only PXA LCD)
-vga [std|cirrus|vmware|xenfb|none]
                select video card type
-full-screen    start in full screen
-vnc display    start a VNC server on display

i386 target only:
-win2k-hack     use it when installing Windows 2000 to avoid a disk full bug
-no-fd-bootchk  disable boot signature checking for floppy disks
-no-acpi        disable ACPI
-no-hpet        disable HPET
-balloon none   disable balloon device
-balloon virtio[,addr=str]
                enable virtio balloon device (default)
-acpitable [sig=str][,rev=n][,oem_id=str][,oem_table_id=str][,oem_rev=n][,asl_compiler_id=str][,asl_compiler_rev=n][,data=file1[:file2]...]
                ACPI table description
-smbios file=binary
                Load SMBIOS entry from binary file
-smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d]
                Specify SMBIOS type 0 fields
-smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str]
              [,uuid=uuid][,sku=str][,family=str]
                Specify SMBIOS type 1 fields

Network options:
-net nic[,vlan=n][,macaddr=mac][,model=type][,name=str][,addr=str][,vectors=v]
                create a new Network Interface Card and connect it to VLAN 'n'
-net user[,vlan=n][,name=str][,net=addr[/mask]][,host=addr][,restrict=y|n]
         [,hostname=host][,dhcpstart=addr][,dns=addr][,tftp=dir][,bootfile=f]
         [,hostfwd=rule][,guestfwd=rule][,smb=dir[,smbserver=addr]]
                connect the user mode network stack to VLAN 'n', configure its
                DHCP server and enabled optional services
-net tap[,vlan=n][,name=str][,fd=h][,ifname=name][,script=file][,downscript=dfile][,sndbuf=nbytes][,vnet_hdr=on|off]
                connect the host TAP network interface to VLAN 'n' and use the
                network scripts 'file' (default=/etc/kvm/kvm-ifup)
                and 'dfile' (default=/etc/kvm/kvm-ifdown);
                use '[down]script=no' to disable script execution;
                use 'fd=h' to connect to an already opened TAP interface
                use 'sndbuf=nbytes' to limit the size of the send buffer; the
                default of 'sndbuf=1048576' can be disabled using 'sndbuf=0'
                use vnet_hdr=off to avoid enabling the IFF_VNET_HDR tap flag; use
                vnet_hdr=on to make the lack of IFF_VNET_HDR support an error condition
-net socket[,vlan=n][,name=str][,fd=h][,listen=[host]:port][,connect=host:port]
                connect the vlan 'n' to another VLAN using a socket connection
-net socket[,vlan=n][,name=str][,fd=h][,mcast=maddr:port]
                connect the vlan 'n' to multicast maddr and port
-net vde[,vlan=n][,name=str][,sock=socketpath][,port=n][,group=groupname][,mode=octalmode]
                connect the vlan 'n' to port 'n' of a vde switch running
                on host and listening for incoming connections on 'socketpath'.
                Use group 'groupname' and mode 'octalmode' to change default
                ownership and permissions for communication port.
-net dump[,vlan=n][,file=f][,len=n]
                dump traffic on vlan 'n' to file 'f' (max n bytes per packet)
-net none       use it alone to have zero network devices; if no -net option
                is provided, the default is '-net nic -net user'
-netdev [user|tap|vde|socket],id=str[,option][,option][,...]

Character device options:
-chardev null,id=id
-chardev socket,id=id[,host=host],port=host[,to=to][,ipv4][,ipv6][,nodelay]
         [,server][,nowait][,telnet] (tcp)
-chardev socket,id=id,path=path[,server][,nowait][,telnet] (unix)
-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]
         [,localport=localport][,ipv4][,ipv6]
-chardev msmouse,id=id
-chardev vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]
-chardev file,id=id,path=path
-chardev pipe,id=id,path=path
-chardev pty,id=id
-chardev stdio,id=id,[,signal=on|off]
-chardev braille,id=id
-chardev tty,id=id,path=path
-chardev parport,id=id,path=path

Bluetooth(R) options:
-bt hci,null    dumb bluetooth HCI - doesn't respond to commands
-bt hci,host[:id]
                use host's HCI with the given name
-bt hci[,vlan=n]
                emulate a standard HCI in virtual scatternet 'n'
-bt vhci[,vlan=n]
                add host computer to virtual scatternet 'n' using VHCI
-bt device:dev[,vlan=n]
                emulate a bluetooth device 'dev' in scatternet 'n'

Linux/Multiboot boot specific:
-kernel bzImage use 'bzImage' as kernel image
-append cmdline use 'cmdline' as kernel command line
-initrd file    use 'file' as initial ram disk

Debug/Expert options:
-serial dev     redirect the serial port to char device 'dev'
-parallel dev   redirect the parallel port to char device 'dev'
-monitor dev    redirect the monitor to char device 'dev'
-qmp dev        like -monitor but opens in 'control' mode.
-mon chardev=[name][,mode=readline|control][,default]
-pidfile file   write PID to 'file'
-singlestep   always run in singlestep mode
-S              freeze CPU at startup (use 'c' to start execution)
-gdb dev        wait for gdb connection on 'dev'
-s              shorthand for -gdb tcp::1234
-d item1,...    output log to /tmp/qemu.log (use -d ? for a list of log items)
-hdachs c,h,s[,t]
                force hard disk 0 physical geometry and the optional BIOS
                translation (t=none or lba) (usually qemu can guess them)
-L path         set the directory for the BIOS, VGA BIOS and keymaps
-bios file      set the filename for the BIOS
-enable-kvm     enable KVM full virtualization support
-no-reboot      exit instead of rebooting
-no-shutdown    stop before shutdown
-loadvm [tag|id]
                start right away with a saved state (loadvm in monitor)
-daemonize      daemonize QEMU after initializing
-option-rom rom load a file, rom, into the option ROM space
-clock          force the use of the given methods for timer alarm.
                To see what timers are available use -clock ?
-rtc [base=utc|localtime|date][,clock=host|vm][,driftfix=none|slew]
                set the RTC base and clock, enable drift fix for clock ticks
-icount [N|auto]
                enable virtual instruction counter with 2^N clock ticks per
                instruction
-watchdog i6300esb|ib700
                enable virtual hardware watchdog [default=none]
-watchdog-action reset|shutdown|poweroff|pause|debug|none
                action when watchdog fires [default=reset]
-echr chr       set terminal escape character instead of ctrl-a
-virtioconsole c
                set virtio console
-show-cursor    show cursor
-tb-size n      set TB size
-incoming uri   wait on uri for incoming migration
-nodefaults     don't create default devices.
-chroot dir     Chroot to dir just before starting the VM.
-runas user     Change to user id user just before starting the VM.
-readconfig <file>
-writeconfig <file>
                read/write config file
-no-kvm         disable KVM hardware virtualization
-no-kvm-irqchip disable KVM kernel mode PIC/IOAPIC/LAPIC
-no-kvm-pit     disable KVM kernel mode PIT
-no-kvm-pit-reinjection disable KVM kernel mode PIT interrupt reinjection
-pcidevice host=bus:dev.func[,dma=none][,name=string]
                expose a PCI device to the guest OS.
                dma=none: don't perform any dma translations (default is to use an iommu)
                'string' is used in log output.
-enable-nesting enable support for running a VM inside the VM (AMD only)
-nvram FILE          provide ia64 nvram contents
-tdf                 enable guest time drift compensation
-kvm-shadow-memory MEGABYTES
                     allocate MEGABYTES for kvm mmu shadowing
-mem-path FILE       provide backing storage for guest RAM
-mem-prealloc        preallocate guest memory (use with -mempath)

During emulation, the following keys are useful:
ctrl-alt-f      toggle full screen
ctrl-alt-n      switch to virtual console 'n'
ctrl-alt        toggle mouse and keyboard grab

When using -nographic, press 'ctrl-a h' to get some help.