"-machine [type=]name[,prop[=value][,...]]\n"
" selects emulated machine ('-machine help' for list)\n"
" property accel=accel1[:accel2[:...]] selects accelerator\n"
- " supported accelerators are kvm, xen, tcg (default: tcg)\n"
+ " supported accelerators are kvm, xen, hax or tcg (default: tcg)\n"
" kernel_irqchip=on|off|split controls accelerated irqchip support (default=off)\n"
" vmport=on|off|auto controls emulation of vmport (default: auto)\n"
" kvm_shadow_mem=size of KVM shadow MMU in bytes\n"
" dea-key-wrap=on|off controls support for DEA key wrapping (default=on)\n"
" suppress-vmdesc=on|off disables self-describing migration (default=off)\n"
" nvdimm=on|off controls NVDIMM support (default=off)\n"
- " enforce-config-section=on|off enforce configuration section migration (default=off)\n",
+ " enforce-config-section=on|off enforce configuration section migration (default=off)\n"
+ " s390-squash-mcss=on|off controls support for squashing into default css (default=off)\n",
QEMU_ARCH_ALL)
STEXI
@item -machine [type=]@var{name}[,prop=@var{value}[,...]]
@table @option
@item accel=@var{accels1}[:@var{accels2}[:...]]
This is used to enable an accelerator. Depending on the target architecture,
-kvm, xen, or tcg can be available. By default, tcg is used. If there is more
-than one accelerator specified, the next one is used if the previous one fails
-to initialize.
+kvm, xen, hax or tcg can be available. By default, tcg is used. If there is
+more than one accelerator specified, the next one is used if the previous one
+fails to initialize.
@item kernel_irqchip=on|off
Controls in-kernel irqchip support for the chosen accelerator when available.
@item gfx_passthru=on|off
execution of DEA cryptographic functions. The default is on.
@item nvdimm=on|off
Enables or disables NVDIMM support. The default is off.
+@item s390-squash-mcss=on|off
+Enables or disables squashing subchannels into the default css.
+The default is off.
@end table
ETEXI
DEF("accel", HAS_ARG, QEMU_OPTION_accel,
"-accel [accel=]accelerator[,thread=single|multi]\n"
- " select accelerator ('-accel help for list')\n"
- " thread=single|multi (enable multi-threaded TCG)", QEMU_ARCH_ALL)
+ " select accelerator (kvm, xen, hax or tcg; use 'help' for a list)\n"
+ " thread=single|multi (enable multi-threaded TCG)", QEMU_ARCH_ALL)
STEXI
@item -accel @var{name}[,prop=@var{value}[,...]]
@findex -accel
This is used to enable an accelerator. Depending on the target architecture,
-kvm, xen, or tcg can be available. By default, tcg is used. If there is more
-than one accelerator specified, the next one is used if the previous one fails
-to initialize.
+kvm, xen, hax or tcg can be available. By default, tcg is used. If there is
+more than one accelerator specified, the next one is used if the previous one
+fails to initialize.
@table @option
@item thread=single|multi
Controls number of TCG threads. When the TCG is multi-threaded there will be one
DEF("numa", HAS_ARG, QEMU_OPTION_numa,
"-numa node[,mem=size][,cpus=firstcpu[-lastcpu]][,nodeid=node]\n"
- "-numa node[,memdev=id][,cpus=firstcpu[-lastcpu]][,nodeid=node]\n", QEMU_ARCH_ALL)
+ "-numa node[,memdev=id][,cpus=firstcpu[-lastcpu]][,nodeid=node]\n"
+ "-numa dist,src=source,dst=destination,val=distance\n", QEMU_ARCH_ALL)
STEXI
@item -numa node[,mem=@var{size}][,cpus=@var{firstcpu}[-@var{lastcpu}]][,nodeid=@var{node}]
@itemx -numa node[,memdev=@var{id}][,cpus=@var{firstcpu}[-@var{lastcpu}]][,nodeid=@var{node}]
+@itemx -numa dist,src=@var{source},dst=@var{destination},val=@var{distance}
+@itemx -numa cpu,node-id=@var{node}[,socket-id=@var{x}][,core-id=@var{y}][,thread-id=@var{z}]
@findex -numa
Define a NUMA node and assign RAM and VCPUs to it.
+Set the NUMA distance from a source node to a destination node.
+Legacy VCPU assignment uses @samp{cpus} option where
@var{firstcpu} and @var{lastcpu} are CPU indexes. Each
@samp{cpus} option represent a contiguous range of CPU indexes
(or a single VCPU if @var{lastcpu} is omitted). A non-contiguous
-numa node,cpus=0-2,cpus=5
@end example
+@samp{cpu} option is a new alternative to @samp{cpus} option
+which uses @samp{socket-id|core-id|thread-id} properties to assign
+CPU objects to a @var{node} using topology layout properties of CPU.
+The set of properties is machine specific, and depends on used
+machine type/@samp{smp} options. It could be queried with
+@samp{hotpluggable-cpus} monitor command.
+@samp{node-id} property specifies @var{node} to which CPU object
+will be assigned, it's required for @var{node} to be declared
+with @samp{node} option before it's used with @samp{cpu} option.
+
+For example:
+@example
+-M pc \
+-smp 1,sockets=2,maxcpus=2 \
+-numa node,nodeid=0 -numa node,nodeid=1 \
+-numa cpu,node-id=0,socket-id=0 -numa cpu,node-id=1,socket-id=1
+@end example
+
@samp{mem} assigns a given RAM amount to a node. @samp{memdev}
assigns RAM from a given memory backend device to a node. If
@samp{mem} and @samp{memdev} are omitted in all nodes, RAM is
@samp{mem} and @samp{memdev} are mutually exclusive. Furthermore,
if one node uses @samp{memdev}, all of them have to use it.
+@var{source} and @var{destination} are NUMA node IDs.
+@var{distance} is the NUMA distance from @var{source} to @var{destination}.
+The distance from a node to itself is always 10. If any pair of nodes is
+given a distance, then all pairs must be given distances. Although, when
+distances are only given in one direction for each pair of nodes, then
+the distances in the opposite directions are assumed to be the same. If,
+however, an asymmetrical pair of distances is given for even one node
+pair, then all node pairs must be provided distance values for both
+directions, even when they are symmetrical. When a node is unreachable
+from another node, set the pair's distance to 255.
+
Note that the -@option{numa} option doesn't allocate any of the
specified resources, it just assigns existing resources to NUMA
nodes. This means that one still has to use the @option{-m},
specific URLs. See the section for "Device URL Syntax" for more information.
@item if=@var{interface}
This option defines on which type on interface the drive is connected.
-Available types are: ide, scsi, sd, mtd, floppy, pflash, virtio.
+Available types are: ide, scsi, sd, mtd, floppy, pflash, virtio, none.
@item bus=@var{bus},unit=@var{unit}
These options define where is connected the drive by defining the bus number and
the unit id.
DEF("virtfs", HAS_ARG, QEMU_OPTION_virtfs,
"-virtfs local,path=path,mount_tag=tag,security_model=[mapped-xattr|mapped-file|passthrough|none]\n"
- " [,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd]\n",
+ " [,id=id][,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd]\n",
QEMU_ARCH_ALL)
STEXI
ETEXI
DEF("usb", 0, QEMU_OPTION_usb,
- "-usb enable the USB driver (will be the default soon)\n",
+ "-usb enable the USB driver (if it is not used by default yet)\n",
QEMU_ARCH_ALL)
STEXI
@item -usb
@findex -usb
-Enable the USB driver (will be the default soon)
+Enable the USB driver (if it is not used by default yet).
ETEXI
DEF("usbdevice", HAS_ARG, QEMU_OPTION_usbdevice,
@item -usbdevice @var{devname}
@findex -usbdevice
-Add the USB device @var{devname}. @xref{usb_devices}.
+Add the USB device @var{devname}. Note that this option is deprecated,
+please use @code{-device usb-...} instead. @xref{usb_devices}.
@table @option
window. With this option, you can have QEMU listen on VNC display
@var{display} and redirect the VGA display over the VNC session. It is
very useful to enable the usb tablet device when using this option
-(option @option{-usbdevice tablet}). When using the VNC display, you
+(option @option{-device usb-tablet}). When using the VNC display, you
must use the @option{-k} parameter to set the keyboard layout if you are
not using en-us. Valid syntax for the @var{display} is
be the same. we can just use indev or outdev, but at least one of indev or outdev
need to be specified.
-@item -object filter-rewriter,id=@var{id},netdev=@var{netdevid},rewriter-mode=@var{mode}[,queue=@var{all|rx|tx}]
+@item -object filter-rewriter,id=@var{id},netdev=@var{netdevid}[,queue=@var{all|rx|tx}]
Filter-rewriter is a part of COLO project.It will rewrite tcp packet to
secondary from primary to keep secondary tcp connection,and rewrite
projects / qemu.git / blobdiff