ETEXI
DEF("smp", HAS_ARG, QEMU_OPTION_smp,
- "-smp n set the number of CPUs to 'n' [default=1]\n")
-STEXI
-@item -smp @var{n}
+ "-smp n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]\n"
+ " set the number of CPUs to 'n' [default=1]\n"
+ " maxcpus= maximum number of total cpus, including\n"
+ " offline CPUs for hotplug etc.\n"
+ " cores= number of CPU cores on one socket\n"
+ " threads= number of threads on one CPU core\n"
+ " sockets= number of discrete sockets in the system\n")
+STEXI
+@item -smp @var{n}[,cores=@var{cores}][,threads=@var{threads}][,sockets=@var{sockets}][,maxcpus=@var{maxcpus}]
Simulate an SMP system with @var{n} CPUs. On the PC target, up to 255
CPUs are supported. On Sparc32 target, Linux limits the number of usable CPUs
to 4.
+For the PC target, the number of @var{cores} per socket, the number
+of @var{threads} per cores and the total number of @var{sockets} can be
+specified. Missing values will be computed. If any on the three values is
+given, the total number of CPUs @var{n} can be omitted. @var{maxcpus}
+specifies the maximum number of hotpluggable CPUs.
ETEXI
DEF("numa", HAS_ARG, QEMU_OPTION_numa,
"-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]\n"
" [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]\n"
" [,cache=writethrough|writeback|none][,format=f][,serial=s]\n"
- " [,addr=A]\n"
+ " [,addr=A][,id=name][,aio=threads|native]\n"
" use 'file' as a drive image\n")
+DEF("set", HAS_ARG, QEMU_OPTION_set,
+ "-set group.id.arg=value\n"
+ " set <arg> parameter for item <id> of type <group>\n"
+ " i.e. -set drive.$id.file=/path/to/image\n")
STEXI
@item -drive @var{option}[,@var{option}[,@var{option}[,...]]]
@var{snapshot} is "on" or "off" and allows to enable snapshot for given drive (see @option{-snapshot}).
@item cache=@var{cache}
@var{cache} is "none", "writeback", or "writethrough" and controls how the host cache is used to access block data.
+@item aio=@var{aio}
+@var{aio} is "threads", or "native" and selects between pthread based disk I/O and native Linux AIO.
@item format=@var{format}
Specify which disk @var{format} will be used rather than detecting
the format. Can be used to specifiy format=raw to avoid interpreting
Some block drivers perform badly with @option{cache=writethrough}, most notably,
qcow2. If performance is more important than correctness,
-@option{cache=writeback} should be used with qcow2. By default, if no explicit
-caching is specified for a qcow2 disk image, @option{cache=writeback} will be
-used. For all other disk types, @option{cache=writethrough} is the default.
+@option{cache=writeback} should be used with qcow2.
Instead of @option{-cdrom} you can use:
@example
ETEXI
DEF("boot", HAS_ARG, QEMU_OPTION_boot,
- "-boot [a|c|d|n] boot on floppy (a), hard disk (c), CD-ROM (d), or network (n)\n")
+ "-boot [order=drives][,once=drives][,menu=on|off]\n"
+ " 'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)\n")
STEXI
-@item -boot [a|c|d|n]
-Boot on floppy (a), hard disk (c), CD-ROM (d), or Etherboot (n). Hard disk boot
-is the default.
+@item -boot [order=@var{drives}][,once=@var{drives}][,menu=on|off]
+
+Specify boot order @var{drives} as a string of drive letters. Valid
+drive letters depend on the target achitecture. The x86 PC uses: a, b
+(floppy 1 and 2), c (first hard disk), d (first CD-ROM), n-p (Etherboot
+from network adapter 1-4), hard disk boot is the default. To apply a
+particular boot order only on the first startup, specify it via
+@option{once}.
+
+Interactive boot menus/prompts can be enabled via @option{menu=on} as far
+as firmware/BIOS supports them. The default is non-interactive boot.
+
+@example
+# try to boot from network first, then from hard disk
+qemu -boot order=nc
+# boot from CD-ROM first, switch back to default order after reboot
+qemu -boot once=d
+@end example
+
+Note: The legacy format '-boot @var{drives}' is still supported but its
+use is discouraged as it may be removed from future versions.
ETEXI
DEF("snapshot", 0, QEMU_OPTION_snapshot,
@end table
ETEXI
+DEF("device", HAS_ARG, QEMU_OPTION_device,
+ "-device driver[,options] add device\n")
DEF("name", HAS_ARG, QEMU_OPTION_name,
- "-name string set the name of the guest\n")
+ "-name string1[,process=string2] set the name of the guest\n"
+ " string1 sets the window title and string2 the process name (on Linux)\n")
STEXI
@item -name @var{name}
Sets the @var{name} of the guest.
This name will be displayed in the SDL window caption.
The @var{name} will also be used for the VNC server.
+Also optionally set the top visible process name in Linux.
ETEXI
DEF("uuid", HAS_ARG, QEMU_OPTION_uuid,
ETEXI
#ifdef TARGET_I386
-DEF("no-virtio-balloon", 0, QEMU_OPTION_no_virtio_balloon,
- "-no-virtio-balloon disable virtio balloon device\n")
+DEF("balloon", HAS_ARG, QEMU_OPTION_balloon,
+ "-balloon none disable balloon device\n"
+ "-balloon virtio[,addr=str]\n"
+ " enable virtio balloon device (default)\n")
#endif
STEXI
-@item -no-virtio-balloon
-Disable virtio-balloon device.
+@item -balloon none
+Disable balloon device.
+@item -balloon virtio[,addr=@var{addr}]
+Enable virtio balloon device (default), optionally with PCI address
+@var{addr}.
ETEXI
#ifdef TARGET_I386
" use '[down]script=no' to disable script execution;\n"
" use 'fd=h' to connect to an already opened TAP interface\n"
#ifdef TUNSETSNDBUF
- " use 'sndbuf=nbytes' to limit the size of the send buffer\n"
+ " use 'sndbuf=nbytes' to limit the size of the send buffer; the\n"
+ " default of 'sndbuf=1048576' can be disabled using 'sndbuf=0'\n"
#endif
#endif
"-net socket[,vlan=n][,name=str][,fd=h][,listen=[host]:port][,connect=host:port]\n"
STEXI
@item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}][,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
Create a new Network Interface Card and connect it to VLAN @var{n} (@var{n}
-= 0 is the default). The NIC is an ne2k_pci by default on the PC
+= 0 is the default). The NIC is an e1000 by default on the PC
target. Optionally, the MAC address can be changed to @var{mac}, the
device address set to @var{addr} (PCI cards only),
and a @var{name} can be assigned for use in monitor commands.
@table @option
ETEXI
+DEF("chardev", HAS_ARG, QEMU_OPTION_chardev, \
+ "-chardev spec create unconnected chardev\n")
DEF("serial", HAS_ARG, QEMU_OPTION_serial, \
"-serial dev redirect the serial port to char device 'dev'\n")
STEXI
Set the filename for the BIOS.
ETEXI
-#ifdef CONFIG_KQEMU
-DEF("kernel-kqemu", 0, QEMU_OPTION_kernel_kqemu, \
- "-kernel-kqemu enable KQEMU full virtualization (default is user mode only)\n")
-#endif
-STEXI
-@item -kernel-kqemu
-Enable KQEMU full virtualization (default is user mode only).
-ETEXI
-
-#ifdef CONFIG_KQEMU
-DEF("no-kqemu", 0, QEMU_OPTION_no_kqemu, \
- "-no-kqemu disable KQEMU kernel module usage\n")
-#endif
-STEXI
-@item -no-kqemu
-Disable KQEMU kernel module usage. KQEMU options are only available if
-KQEMU support is enabled when compiling.
-ETEXI
-
#ifdef CONFIG_KVM
DEF("enable-kvm", 0, QEMU_OPTION_enable_kvm, \
"-enable-kvm enable KVM full virtualization support\n")
projects / qemu.git / blobdiff