" 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
@end example
ETEXI
-DEF("balloon", HAS_ARG, QEMU_OPTION_balloon,
- "-balloon virtio[,addr=str]\n"
- " enable virtio balloon device (deprecated)\n", QEMU_ARCH_ALL)
-STEXI
-@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.
-ETEXI
-
DEF("device", HAS_ARG, QEMU_OPTION_device,
"-device driver[,prop[=value][,...]]\n"
" add device (based on driver)\n"
@item cache-size
The maximum total size of the L2 table and refcount block caches in bytes
-(default: 1048576 bytes or 8 clusters, whichever is larger)
+(default: the sum of l2-cache-size and refcount-cache-size)
@item l2-cache-size
The maximum size of the L2 table cache in bytes
-(default: 4/5 of the total cache size)
+(default: if cache-size is not specified - 32M on Linux platforms, and 8M on
+non-Linux platforms; otherwise, as large as possible within the cache-size,
+while permitting the requested or the minimal refcount cache size)
@item refcount-cache-size
The maximum size of the refcount block cache in bytes
-(default: 1/5 of the total cache size)
+(default: 4 times the cluster size; or if cache-size is specified, the part of
+it which is not used for the L2 cache)
@item cache-clean-interval
Clean unused entries in the L2 and refcount caches. The interval is in seconds.
-The default value is 0 and it disables this feature.
+The default value is 600 on supporting platforms, and 0 on other platforms.
+Setting it to 0 disables this feature.
@item pass-discard-request
Whether discard requests to the qcow2 device should be forwarded to the data
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),
mechanism. The credentials should have been previously created
using the @option{-object tls-creds} argument.
-The @option{tls-creds} parameter obsoletes the @option{tls},
-@option{x509}, and @option{x509verify} options, and as such
-it is not permitted to set both new and old type options at
-the same time.
-
-@item tls
-
-Require that client use TLS when communicating with the VNC server. This
-uses anonymous TLS credentials so is susceptible to a man-in-the-middle
-attack. It is recommended that this option be combined with either the
-@option{x509} or @option{x509verify} options.
-
-This option is now deprecated in favor of using the @option{tls-creds}
-argument.
-
-@item x509=@var{/path/to/certificate/dir}
-
-Valid if @option{tls} is specified. Require that x509 credentials are used
-for negotiating the TLS session. The server will send its x509 certificate
-to the client. It is recommended that a password be set on the VNC server
-to provide authentication of the client when this is used. The path following
-this option specifies where the x509 certificates are to be loaded from.
-See the @ref{vnc_security} section for details on generating certificates.
-
-This option is now deprecated in favour of using the @option{tls-creds}
-argument.
-
-@item x509verify=@var{/path/to/certificate/dir}
-
-Valid if @option{tls} is specified. Require that x509 credentials are used
-for negotiating the TLS session. The server will send its x509 certificate
-to the client, and request that the client send its own x509 certificate.
-The server will validate the client's certificate against the CA certificate,
-and reject clients when validation fails. If the certificate authority is
-trusted, this is a sufficient authentication mechanism. You may still wish
-to set a password on the VNC server as a second authentication layer. The
-path following this option specifies where the x509 certificates are to
-be loaded from. See the @ref{vnc_security} section for details on generating
-certificates.
-
-This option is now deprecated in favour of using the @option{tls-creds}
-argument.
-
@item sasl
Require that the client use SASL to authenticate with the VNC server.
slows down the IDE transfers).
ETEXI
-HXCOMM Deprecated by -rtc
-DEF("rtc-td-hack", 0, QEMU_OPTION_rtc_td_hack, "", QEMU_ARCH_I386)
-
DEF("no-fd-bootchk", 0, QEMU_OPTION_no_fd_bootchk,
"-no-fd-bootchk disable boot signature checking for floppy disks\n",
QEMU_ARCH_I386)
@table @option
ETEXI
-HXCOMM Legacy slirp options (now moved to -net user):
-#ifdef CONFIG_SLIRP
-DEF("tftp", HAS_ARG, QEMU_OPTION_tftp, "", QEMU_ARCH_ALL)
-DEF("bootp", HAS_ARG, QEMU_OPTION_bootp, "", QEMU_ARCH_ALL)
-DEF("redir", HAS_ARG, QEMU_OPTION_redir, "", QEMU_ARCH_ALL)
-#ifndef _WIN32
-DEF("smb", HAS_ARG, QEMU_OPTION_smb, "", QEMU_ARCH_ALL)
-#endif
-#endif
-
DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
#ifdef CONFIG_SLIRP
"-netdev user,id=str[,ipv4[=on|off]][,net=addr[/mask]][,host=addr]\n"
"-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,
@end table
-Note: Legacy stand-alone options -tftp, -bootp, -smb and -redir are still
-processed and applied to -net user. Mixing them with the new configuration
-syntax gives undefined results. Their use for new applications is discouraged
-as they will be removed from future versions.
-
@item -netdev tap,id=@var{id}[,fd=@var{h}][,ifname=@var{name}][,script=@var{file}][,downscript=@var{dfile}][,br=@var{bridge}][,helper=@var{helper}]
Configure a host TAP network backend with ID @var{id}.
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, \
ETEXI
DEF("overcommit", HAS_ARG, QEMU_OPTION_overcommit,
- "--overcommit [mem-lock=on|off][cpu-pm=on|off]\n"
+ "-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",
HXCOMM Silently ignored for compatibility
DEF("clock", HAS_ARG, QEMU_OPTION_clock, "", QEMU_ARCH_ALL)
-HXCOMM Options deprecated by -rtc
-DEF("localtime", 0, QEMU_OPTION_localtime, "", QEMU_ARCH_ALL)
-DEF("startdate", HAS_ARG, QEMU_OPTION_startdate, "", QEMU_ARCH_ALL)
-
DEF("rtc", HAS_ARG, QEMU_OPTION_rtc, \
"-rtc [base=utc|localtime|date][,clock=host|rt|vm][,driftfix=none|slew]\n" \
" set the RTC base and clock, enable drift fix for clock ticks (x86 only)\n",
command line and device configuration into file or dash @code{-}) character to print the
output to stdout. This can be later used as input file for @code{-readconfig} option.
ETEXI
-HXCOMM Deprecated, same as -no-user-config
-DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig, "", QEMU_ARCH_ALL)
+
DEF("no-user-config", 0, QEMU_OPTION_nouserconfig,
"-no-user-config\n"
" do not load default user-provided config files at startup\n",
The @code{-no-user-config} option makes QEMU not load any of the user-provided
config files on @var{sysconfdir}.
ETEXI
+
DEF("trace", HAS_ARG, QEMU_OPTION_trace,
"-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
" specify tracing options\n",
in @var{file}
ETEXI
+DEF("enable-sync-profile", 0, QEMU_OPTION_enable_sync_profile,
+ "-enable-sync-profile\n"
+ " enable synchronization profiling\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -enable-sync-profile
+@findex -enable-sync-profile
+Enable synchronization profiling.
+ETEXI
+
STEXI
@end table
ETEXI
the device DAX /dev/dax0.0 requires 2M alignment rather than 4K. In
such cases, users can specify the required alignment via this option.
+The @option{pmem} option specifies whether the backing file specified
+by @option{mem-path} is in host persistent memory that can be accessed
+using the SNIA NVM programming model (e.g. Intel NVDIMM).
+If @option{pmem} is set to 'on', QEMU will take necessary operations to
+guarantee the persistence of its own writes to @option{mem-path}
+(e.g. in vNVDIMM label emulation and live migration).
+
@item -object memory-backend-ram,id=@var{id},merge=@var{on|off},dump=@var{on|off},share=@var{on|off},prealloc=@var{on|off},size=@var{size},host-nodes=@var{host-nodes},policy=@var{default|preferred|bind|interleave}
Creates a memory backend object, which can be used to back the guest RAM.
projects / qemu.git / blobdiff