" 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"
- " s390-squash-mcss=on|off (deprecated) controls support for squashing into default css (default=off)\n"
" memory-encryption=@var{} memory encryption object to use (default=none)\n",
QEMU_ARCH_ALL)
STEXI
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.
-NOTE: This property is deprecated and will be removed in future releases.
-The ``s390-squash-mcss=on`` property has been obsoleted by allowing the
-cssid to be chosen freely. Instead of squashing subchannels into the
-default channel subsystem image for guests that do not support multiple
-channel subsystems, all devices can be put into the default channel
-subsystem image.
@item enforce-config-section=on|off
If @option{enforce-config-section} is set to @var{on}, force migration
code to send configuration section even if the machine-type sets the
DEF("accel", HAS_ARG, QEMU_OPTION_accel,
"-accel [accel=]accelerator[,thread=single|multi]\n"
" select accelerator (kvm, xen, hax, hvf, whpx or tcg; use 'help' for a list)\n"
- " thread=single|multi (enable multi-threaded TCG)", QEMU_ARCH_ALL)
+ " thread=single|multi (enable multi-threaded TCG)\n", QEMU_ARCH_ALL)
STEXI
@item -accel @var{name}[,prop=@var{value}[,...]]
@findex -accel
@item -balloon virtio[,addr=@var{addr}]
@findex -balloon
Enable virtio balloon device, optionally with PCI address @var{addr}. This
-option is deprecated, use @option{--device virtio-balloon} instead.
+option is deprecated, use @option{-device virtio-balloon} instead.
ETEXI
DEF("device", HAS_ARG, QEMU_OPTION_device,
DEF("drive", HAS_ARG, QEMU_OPTION_drive,
"-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]\n"
" [,cache=writethrough|writeback|none|directsync|unsafe][,format=f]\n"
- " [,snapshot=on|off][,serial=s][,addr=A][,rerror=ignore|stop|report]\n"
+ " [,snapshot=on|off][,rerror=ignore|stop|report]\n"
" [,werror=ignore|stop|report|enospc][,id=name][,aio=threads|native]\n"
" [,readonly=on|off][,copy-on-read=on|off]\n"
" [,discard=ignore|unmap][,detect-zeroes=on|off|unmap]\n"
Specify which disk @var{format} will be used rather than detecting
the format. Can be used to specify format=raw to avoid interpreting
an untrusted format header.
-@item serial=@var{serial}
-This option specifies the serial number to assign to the device. This
-parameter is deprecated, use the corresponding parameter of @code{-device}
-instead.
-@item addr=@var{addr}
-Specify the controller's PCI address (if=virtio only). This parameter is
-deprecated, use the corresponding parameter of @code{-device} instead.
@item werror=@var{action},rerror=@var{action}
Specify which @var{action} to take on write and read errors. Valid actions are:
"ignore" (ignore the error and try to continue), "stop" (pause QEMU),
"-netdev hubport,id=str,hubid=n[,netdev=nd]\n"
" configure a hub port on the hub with ID 'n'\n", QEMU_ARCH_ALL)
DEF("nic", HAS_ARG, QEMU_OPTION_nic,
- "--nic [tap|bridge|"
+ "-nic [tap|bridge|"
#ifdef CONFIG_SLIRP
"user|"
#endif
"socket][,option][,...][mac=macaddr]\n"
" initialize an on-board / default host NIC (using MAC address\n"
" macaddr) and connect it to the given host network backend\n"
- "--nic none use it alone to have zero network devices (the default is to\n"
+ "-nic none use it alone to have zero network devices (the default is to\n"
" provided a 'user' network connection)\n",
QEMU_ARCH_ALL)
DEF("net", HAS_ARG, QEMU_OPTION_net,
ETEXI
DEF("preconfig", 0, QEMU_OPTION_preconfig, \
- "--preconfig pause QEMU before machine is initialized\n",
+ "--preconfig pause QEMU before machine is initialized (experimental)\n",
QEMU_ARCH_ALL)
STEXI
@item --preconfig
@findex --preconfig
Pause QEMU for interactive configuration before the machine is created,
which allows querying and configuring properties that will affect
-machine initialization. Use the QMP command 'exit-preconfig' to exit
-the preconfig state and move to the next state (ie. run guest if -S
-isn't used or pause the second time if -S is used).
+machine initialization. Use QMP command 'x-exit-preconfig' to exit
+the preconfig state and move to the next state (i.e. run guest if -S
+isn't used or pause the second time if -S is used). This option is
+experimental.
ETEXI
DEF("S", 0, QEMU_OPTION_S, \
(enabled by default).
ETEXI
+DEF("overcommit", HAS_ARG, QEMU_OPTION_overcommit,
+ "-overcommit [mem-lock=on|off][cpu-pm=on|off]\n"
+ " run qemu with overcommit hints\n"
+ " mem-lock=on|off controls memory lock support (default: off)\n"
+ " cpu-pm=on|off controls cpu power management (default: off)\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -overcommit mem-lock=on|off
+@item -overcommit cpu-pm=on|off
+@findex -overcommit
+Run qemu with hints about host resource overcommit. The default is
+to assume that host overcommits all resources.
+
+Locking qemu and guest memory can be enabled via @option{mem-lock=on} (disabled
+by default). This works when host memory is not overcommitted and reduces the
+worst-case latency for guest. This is equivalent to @option{realtime}.
+
+Guest ability to manage power state of host cpus (increasing latency for other
+processes on the same host cpu, but decreasing latency for guest) can be
+enabled via @option{cpu-pm=on} (disabled by default). This works best when
+host CPU is not overcommitted. When used, host estimates of CPU cycle and power
+utilization will be incorrect, not taking into account guest idle time.
+ETEXI
+
DEF("gdb", HAS_ARG, QEMU_OPTION_gdb, \
"-gdb dev wait for gdb connection on 'dev'\n", QEMU_ARCH_ALL)
STEXI
Enable HAX (Hardware-based Acceleration eXecution) support. This option
is only available if HAX support is enabled when compiling. HAX is only
applicable to MAC and Windows platform, and thus does not conflict with
-KVM.
+KVM. This option is deprecated, use @option{-accel hax} instead.
ETEXI
DEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid,
recommended that a persistent set of parameters be generated
upfront and saved.
+@item -object tls-creds-psk,id=@var{id},endpoint=@var{endpoint},dir=@var{/path/to/keys/dir}[,username=@var{username}]
+
+Creates a TLS Pre-Shared Keys (PSK) credentials object, which can be used to provide
+TLS support on network backends. The @option{id} parameter is a unique
+ID which network backends will use to access the credentials. The
+@option{endpoint} is either @option{server} or @option{client} depending
+on whether the QEMU network backend that uses the credentials will be
+acting as a client or as a server. For clients only, @option{username}
+is the username which will be sent to the server. If omitted
+it defaults to ``qemu''.
+
+The @var{dir} parameter tells QEMU where to find the keys file.
+It is called ``@var{dir}/keys.psk'' and contains ``username:key''
+pairs. This file can most easily be created using the GnuTLS
+@code{psktool} program.
+
+For server endpoints, @var{dir} may also contain a file
+@var{dh-params.pem} providing diffie-hellman parameters to use
+for the TLS server. If the file is missing, QEMU will generate
+a set of DH parameters at startup. This is a computationally
+expensive operation that consumes random pool entropy, so it is
+recommended that a persistent set of parameters be generated
+up front and saved.
+
@item -object tls-creds-x509,id=@var{id},endpoint=@var{endpoint},dir=@var{/path/to/cred/dir},priority=@var{priority},verify-peer=@var{on|off},passwordid=@var{id}
Creates a TLS anonymous credentials object, which can be used to provide
projects / mirror_qemu.git / blobdiff