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1 QEMU emulator version 3.0.0
2 Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
3 usage: qemu-system-arm [options] [disk_image]
4
5 'disk_image' is a raw hard disk image for IDE hard disk 0
6
7 Standard options:
8 -h or -help display this help and exit
9 -version display version information and exit
10 -machine [type=]name[,prop[=value][,...]]
11 selects emulated machine ('-machine help' for list)
12 property accel=accel1[:accel2[:...]] selects accelerator
13 supported accelerators are kvm, xen, hax, hvf, whpx or tcg (default: tcg)
14 kernel_irqchip=on|off|split controls accelerated irqchip support (default=off)
15 vmport=on|off|auto controls emulation of vmport (default: auto)
16 kvm_shadow_mem=size of KVM shadow MMU in bytes
17 dump-guest-core=on|off include guest memory in a core dump (default=on)
18 mem-merge=on|off controls memory merge support (default: on)
19 igd-passthru=on|off controls IGD GFX passthrough support (default=off)
20 aes-key-wrap=on|off controls support for AES key wrapping (default=on)
21 dea-key-wrap=on|off controls support for DEA key wrapping (default=on)
22 suppress-vmdesc=on|off disables self-describing migration (default=off)
23 nvdimm=on|off controls NVDIMM support (default=off)
24 enforce-config-section=on|off enforce configuration section migration (default=off)
25 s390-squash-mcss=on|off (deprecated) controls support for squashing into default css (default=off)
26 memory-encryption=@var{} memory encryption object to use (default=none)
27 -cpu cpu select CPU ('-cpu help' for list)
28 -accel [accel=]accelerator[,thread=single|multi]
29 select accelerator (kvm, xen, hax, hvf, whpx or tcg; use 'help' for a list)
30 thread=single|multi (enable multi-threaded TCG)
31 -smp [cpus=]n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]
32 set the number of CPUs to 'n' [default=1]
33 maxcpus= maximum number of total cpus, including
34 offline CPUs for hotplug, etc
35 cores= number of CPU cores on one socket
36 threads= number of threads on one CPU core
37 sockets= number of discrete sockets in the system
38 -numa node[,mem=size][,cpus=firstcpu[-lastcpu]][,nodeid=node]
39 -numa node[,memdev=id][,cpus=firstcpu[-lastcpu]][,nodeid=node]
40 -numa dist,src=source,dst=destination,val=distance
41 -numa cpu,node-id=node[,socket-id=x][,core-id=y][,thread-id=z]
42 -add-fd fd=fd,set=set[,opaque=opaque]
43 Add 'fd' to fd 'set'
44 -set group.id.arg=value
45 set <arg> parameter for item <id> of type <group>
46 i.e. -set drive.$id.file=/path/to/image
47 -global driver.property=value
48 -global driver=driver,property=property,value=value
49 set a global default for a driver property
50 -boot [order=drives][,once=drives][,menu=on|off]
51 [,splash=sp_name][,splash-time=sp_time][,reboot-timeout=rb_time][,strict=on|off]
52 'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)
53 'sp_name': the file's name that would be passed to bios as logo picture, if menu=on
54 'sp_time': the period that splash picture last if menu=on, unit is ms
55 'rb_timeout': the timeout before guest reboot when boot failed, unit is ms
56 -m [size=]megs[,slots=n,maxmem=size]
57 configure guest RAM
58 size: initial amount of guest memory
59 slots: number of hotplug slots (default: none)
60 maxmem: maximum amount of guest memory (default: none)
61 NOTE: Some architectures might enforce a specific granularity
62 -mem-path FILE provide backing storage for guest RAM
63 -mem-prealloc preallocate guest memory (use with -mem-path)
64 -k language use keyboard layout (for example 'fr' for French)
65 -audio-help print list of audio drivers and their options
66 -soundhw c1,... enable audio support
67 and only specified sound cards (comma separated list)
68 use '-soundhw help' to get the list of supported cards
69 use '-soundhw all' to enable all of them
70 -balloon virtio[,addr=str]
71 enable virtio balloon device (deprecated)
72 -device driver[,prop[=value][,...]]
73 add device (based on driver)
74 prop=value,... sets driver properties
75 use '-device help' to print all possible drivers
76 use '-device driver,help' to print all possible properties
77 -name string1[,process=string2][,debug-threads=on|off]
78 set the name of the guest
79 string1 sets the window title and string2 the process name (on Linux)
80 When debug-threads is enabled, individual threads are given a separate name (on Linux)
81 NOTE: The thread names are for debugging and not a stable API.
82 -uuid %08x-%04x-%04x-%04x-%012x
83 specify machine UUID
84
85 Block device options:
86 -fda/-fdb file use 'file' as floppy disk 0/1 image
87 -hda/-hdb file use 'file' as IDE hard disk 0/1 image
88 -hdc/-hdd file use 'file' as IDE hard disk 2/3 image
89 -cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)
90 -blockdev [driver=]driver[,node-name=N][,discard=ignore|unmap]
91 [,cache.direct=on|off][,cache.no-flush=on|off]
92 [,read-only=on|off][,detect-zeroes=on|off|unmap]
93 [,driver specific parameters...]
94 configure a block backend
95 -drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]
96 [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]
97 [,cache=writethrough|writeback|none|directsync|unsafe][,format=f]
98 [,serial=s][,addr=A][,rerror=ignore|stop|report]
99 [,werror=ignore|stop|report|enospc][,id=name][,aio=threads|native]
100 [,readonly=on|off][,copy-on-read=on|off]
101 [,discard=ignore|unmap][,detect-zeroes=on|off|unmap]
102 [[,bps=b]|[[,bps_rd=r][,bps_wr=w]]]
103 [[,iops=i]|[[,iops_rd=r][,iops_wr=w]]]
104 [[,bps_max=bm]|[[,bps_rd_max=rm][,bps_wr_max=wm]]]
105 [[,iops_max=im]|[[,iops_rd_max=irm][,iops_wr_max=iwm]]]
106 [[,iops_size=is]]
107 [[,group=g]]
108 use 'file' as a drive image
109 -mtdblock file use 'file' as on-board Flash memory image
110 -sd file use 'file' as SecureDigital card image
111 -pflash file use 'file' as a parallel flash image
112 -snapshot write to temporary files instead of disk image files
113 -fsdev fsdriver,id=id[,path=path,][security_model={mapped-xattr|mapped-file|passthrough|none}]
114 [,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd][,fmode=fmode][,dmode=dmode]
115 [[,throttling.bps-total=b]|[[,throttling.bps-read=r][,throttling.bps-write=w]]]
116 [[,throttling.iops-total=i]|[[,throttling.iops-read=r][,throttling.iops-write=w]]]
117 [[,throttling.bps-total-max=bm]|[[,throttling.bps-read-max=rm][,throttling.bps-write-max=wm]]]
118 [[,throttling.iops-total-max=im]|[[,throttling.iops-read-max=irm][,throttling.iops-write-max=iwm]]]
119 [[,throttling.iops-size=is]]
120 -virtfs local,path=path,mount_tag=tag,security_model=[mapped-xattr|mapped-file|passthrough|none]
121 [,id=id][,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd][,fmode=fmode][,dmode=dmode]
122 -virtfs_synth Create synthetic file system image
123 -iscsi [user=user][,password=password]
124 [,header-digest=CRC32C|CR32C-NONE|NONE-CRC32C|NONE
125 [,initiator-name=initiator-iqn][,id=target-iqn]
126 [,timeout=timeout]
127 iSCSI session parameters
128
129 USB options:
130 -usb enable the USB driver (if it is not used by default yet)
131 -usbdevice name add the host or guest USB device 'name'
132
133 Display options:
134 -display sdl[,frame=on|off][,alt_grab=on|off][,ctrl_grab=on|off]
135 [,window_close=on|off][,gl=on|core|es|off]
136 -display gtk[,grab_on_hover=on|off][,gl=on|off]|
137 -display vnc=<display>[,<optargs>]
138 -display curses
139 -display none select display type
140 The default display is equivalent to
141 "-vnc localhost:0,to=99,id=default"
142 -nographic disable graphical output and redirect serial I/Os to console
143 -curses shorthand for -display curses
144 -no-frame open SDL window without a frame and window decorations
145 -alt-grab use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)
146 -ctrl-grab use Right-Ctrl to grab mouse (instead of Ctrl-Alt)
147 -no-quit disable SDL window close capability
148 -sdl shorthand for -display sdl
149 -spice [port=port][,tls-port=secured-port][,x509-dir=<dir>]
150 [,x509-key-file=<file>][,x509-key-password=<file>]
151 [,x509-cert-file=<file>][,x509-cacert-file=<file>]
152 [,x509-dh-key-file=<file>][,addr=addr][,ipv4|ipv6|unix]
153 [,tls-ciphers=<list>]
154 [,tls-channel=[main|display|cursor|inputs|record|playback]]
155 [,plaintext-channel=[main|display|cursor|inputs|record|playback]]
156 [,sasl][,password=<secret>][,disable-ticketing]
157 [,image-compression=[auto_glz|auto_lz|quic|glz|lz|off]]
158 [,jpeg-wan-compression=[auto|never|always]]
159 [,zlib-glz-wan-compression=[auto|never|always]]
160 [,streaming-video=[off|all|filter]][,disable-copy-paste]
161 [,disable-agent-file-xfer][,agent-mouse=[on|off]]
162 [,playback-compression=[on|off]][,seamless-migration=[on|off]]
163 [,gl=[on|off]][,rendernode=<file>]
164 enable spice
165 at least one of {port, tls-port} is mandatory
166 -portrait rotate graphical output 90 deg left (only PXA LCD)
167 -rotate <deg> rotate graphical output some deg left (only PXA LCD)
168 -vga [std|cirrus|vmware|qxl|xenfb|tcx|cg3|virtio|none]
169 select video card type
170 -full-screen start in full screen
171 -vnc <display> shorthand for -display vnc=<display>
172 -no-acpi disable ACPI
173 -smbios file=binary
174 load SMBIOS entry from binary file
175 -smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d]
176 [,uefi=on|off]
177 specify SMBIOS type 0 fields
178 -smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str]
179 [,uuid=uuid][,sku=str][,family=str]
180 specify SMBIOS type 1 fields
181 -smbios type=2[,manufacturer=str][,product=str][,version=str][,serial=str]
182 [,asset=str][,location=str]
183 specify SMBIOS type 2 fields
184 -smbios type=3[,manufacturer=str][,version=str][,serial=str][,asset=str]
185 [,sku=str]
186 specify SMBIOS type 3 fields
187 -smbios type=4[,sock_pfx=str][,manufacturer=str][,version=str][,serial=str]
188 [,asset=str][,part=str]
189 specify SMBIOS type 4 fields
190 -smbios type=17[,loc_pfx=str][,bank=str][,manufacturer=str][,serial=str]
191 [,asset=str][,part=str][,speed=%d]
192 specify SMBIOS type 17 fields
193
194 Network options:
195 -netdev user,id=str[,ipv4[=on|off]][,net=addr[/mask]][,host=addr]
196 [,ipv6[=on|off]][,ipv6-net=addr[/int]][,ipv6-host=addr]
197 [,restrict=on|off][,hostname=host][,dhcpstart=addr]
198 [,dns=addr][,ipv6-dns=addr][,dnssearch=domain][,domainname=domain]
199 [,tftp=dir][,bootfile=f][,hostfwd=rule][,guestfwd=rule][,smb=dir[,smbserver=addr]]
200 configure a user mode network backend with ID 'str',
201 its DHCP server and optional services
202 -netdev tap,id=str[,fd=h][,fds=x:y:...:z][,ifname=name][,script=file][,downscript=dfile]
203 [,br=bridge][,helper=helper][,sndbuf=nbytes][,vnet_hdr=on|off][,vhost=on|off]
204 [,vhostfd=h][,vhostfds=x:y:...:z][,vhostforce=on|off][,queues=n]
205 [,poll-us=n]
206 configure a host TAP network backend with ID 'str'
207 connected to a bridge (default=br0)
208 use network scripts 'file' (default=/etc/qemu-ifup)
209 to configure it and 'dfile' (default=/etc/qemu-ifdown)
210 to deconfigure it
211 use '[down]script=no' to disable script execution
212 use network helper 'helper' (default=/home/sun/18.04-install/qemu-3.0.0/libexec/qemu-bridge-helper) to
213 configure it
214 use 'fd=h' to connect to an already opened TAP interface
215 use 'fds=x:y:...:z' to connect to already opened multiqueue capable TAP interfaces
216 use 'sndbuf=nbytes' to limit the size of the send buffer (the
217 default is disabled 'sndbuf=0' to enable flow control set 'sndbuf=1048576')
218 use vnet_hdr=off to avoid enabling the IFF_VNET_HDR tap flag
219 use vnet_hdr=on to make the lack of IFF_VNET_HDR support an error condition
220 use vhost=on to enable experimental in kernel accelerator
221 (only has effect for virtio guests which use MSIX)
222 use vhostforce=on to force vhost on for non-MSIX virtio guests
223 use 'vhostfd=h' to connect to an already opened vhost net device
224 use 'vhostfds=x:y:...:z to connect to multiple already opened vhost net devices
225 use 'queues=n' to specify the number of queues to be created for multiqueue TAP
226 use 'poll-us=n' to speciy the maximum number of microseconds that could be
227 spent on busy polling for vhost net
228 -netdev bridge,id=str[,br=bridge][,helper=helper]
229 configure a host TAP network backend with ID 'str' that is
230 connected to a bridge (default=br0)
231 using the program 'helper (default=/home/sun/18.04-install/qemu-3.0.0/libexec/qemu-bridge-helper)
232 -netdev l2tpv3,id=str,src=srcaddr,dst=dstaddr[,srcport=srcport][,dstport=dstport]
233 [,rxsession=rxsession],txsession=txsession[,ipv6=on/off][,udp=on/off]
234 [,cookie64=on/off][,counter][,pincounter][,txcookie=txcookie]
235 [,rxcookie=rxcookie][,offset=offset]
236 configure a network backend with ID 'str' connected to
237 an Ethernet over L2TPv3 pseudowire.
238 Linux kernel 3.3+ as well as most routers can talk
239 L2TPv3. This transport allows connecting a VM to a VM,
240 VM to a router and even VM to Host. It is a nearly-universal
241 standard (RFC3391). Note - this implementation uses static
242 pre-configured tunnels (same as the Linux kernel).
243 use 'src=' to specify source address
244 use 'dst=' to specify destination address
245 use 'udp=on' to specify udp encapsulation
246 use 'srcport=' to specify source udp port
247 use 'dstport=' to specify destination udp port
248 use 'ipv6=on' to force v6
249 L2TPv3 uses cookies to prevent misconfiguration as
250 well as a weak security measure
251 use 'rxcookie=0x012345678' to specify a rxcookie
252 use 'txcookie=0x012345678' to specify a txcookie
253 use 'cookie64=on' to set cookie size to 64 bit, otherwise 32
254 use 'counter=off' to force a 'cut-down' L2TPv3 with no counter
255 use 'pincounter=on' to work around broken counter handling in peer
256 use 'offset=X' to add an extra offset between header and data
257 -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]
258 configure a network backend to connect to another network
259 using a socket connection
260 -netdev socket,id=str[,fd=h][,mcast=maddr:port[,localaddr=addr]]
261 configure a network backend to connect to a multicast maddr and port
262 use 'localaddr=addr' to specify the host address to send packets from
263 -netdev socket,id=str[,fd=h][,udp=host:port][,localaddr=host:port]
264 configure a network backend to connect to another network
265 using an UDP tunnel
266 -netdev vhost-user,id=str,chardev=dev[,vhostforce=on|off]
267 configure a vhost-user network, backed by a chardev 'dev'
268 -netdev hubport,id=str,hubid=n[,netdev=nd]
269 configure a hub port on the hub with ID 'n'
270 -nic [tap|bridge|user|l2tpv3|vhost-user|socket][,option][,...][mac=macaddr]
271 initialize an on-board / default host NIC (using MAC address
272 macaddr) and connect it to the given host network backend
273 -nic none use it alone to have zero network devices (the default is to
274 provided a 'user' network connection)
275 -net nic[,macaddr=mac][,model=type][,name=str][,addr=str][,vectors=v]
276 configure or create an on-board (or machine default) NIC and
277 connect it to hub 0 (please use -nic unless you need a hub)
278 -net [user|tap|bridge|socket][,option][,option][,...]
279 old way to initialize a host network interface
280 (use the -netdev option if possible instead)
281
282 Character device options:
283 -chardev help
284 -chardev null,id=id[,mux=on|off][,logfile=PATH][,logappend=on|off]
285 -chardev socket,id=id[,host=host],port=port[,to=to][,ipv4][,ipv6][,nodelay][,reconnect=seconds]
286 [,server][,nowait][,telnet][,reconnect=seconds][,mux=on|off]
287 [,logfile=PATH][,logappend=on|off][,tls-creds=ID] (tcp)
288 -chardev socket,id=id,path=path[,server][,nowait][,telnet][,reconnect=seconds]
289 [,mux=on|off][,logfile=PATH][,logappend=on|off] (unix)
290 -chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]
291 [,localport=localport][,ipv4][,ipv6][,mux=on|off]
292 [,logfile=PATH][,logappend=on|off]
293 -chardev msmouse,id=id[,mux=on|off][,logfile=PATH][,logappend=on|off]
294 -chardev vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]
295 [,mux=on|off][,logfile=PATH][,logappend=on|off]
296 -chardev ringbuf,id=id[,size=size][,logfile=PATH][,logappend=on|off]
297 -chardev file,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]
298 -chardev pipe,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]
299 -chardev pty,id=id[,mux=on|off][,logfile=PATH][,logappend=on|off]
300 -chardev stdio,id=id[,mux=on|off][,signal=on|off][,logfile=PATH][,logappend=on|off]
301 -chardev serial,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]
302 -chardev tty,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]
303 -chardev parallel,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]
304 -chardev parport,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]
305
306 Bluetooth(R) options:
307 -bt hci,null dumb bluetooth HCI - doesn't respond to commands
308 -bt hci,host[:id]
309 use host's HCI with the given name
310 -bt hci[,vlan=n]
311 emulate a standard HCI in virtual scatternet 'n'
312 -bt vhci[,vlan=n]
313 add host computer to virtual scatternet 'n' using VHCI
314 -bt device:dev[,vlan=n]
315 emulate a bluetooth device 'dev' in scatternet 'n'
316
317 TPM device options:
318 -tpmdev passthrough,id=id[,path=path][,cancel-path=path]
319 use path to provide path to a character device; default is /dev/tpm0
320 use cancel-path to provide path to TPM's cancel sysfs entry; if
321 not provided it will be searched for in /sys/class/misc/tpm?/device
322 -tpmdev emulator,id=id,chardev=dev
323 configure the TPM device using chardev backend
324
325 Linux/Multiboot boot specific:
326 -kernel bzImage use 'bzImage' as kernel image
327 -append cmdline use 'cmdline' as kernel command line
328 -initrd file use 'file' as initial ram disk
329 -dtb file use 'file' as device tree image
330
331 Debug/Expert options:
332 -fw_cfg [name=]<name>,file=<file>
333 add named fw_cfg entry with contents from file
334 -fw_cfg [name=]<name>,string=<str>
335 add named fw_cfg entry with contents from string
336 -serial dev redirect the serial port to char device 'dev'
337 -parallel dev redirect the parallel port to char device 'dev'
338 -monitor dev redirect the monitor to char device 'dev'
339 -qmp dev like -monitor but opens in 'control' mode
340 -qmp-pretty dev like -qmp but uses pretty JSON formatting
341 -mon [chardev=]name[,mode=readline|control][,pretty[=on|off]]
342 -debugcon dev redirect the debug console to char device 'dev'
343 -pidfile file write PID to 'file'
344 -singlestep always run in singlestep mode
345 --preconfig pause QEMU before machine is initialized (experimental)
346 -S freeze CPU at startup (use 'c' to start execution)
347 -realtime [mlock=on|off]
348 run qemu with realtime features
349 mlock=on|off controls mlock support (default: on)
350 -overcommit [mem-lock=on|off][cpu-pm=on|off]
351 run qemu with overcommit hints
352 mem-lock=on|off controls memory lock support (default: off)
353 cpu-pm=on|off controls cpu power management (default: off)
354 -gdb dev wait for gdb connection on 'dev'
355 -s shorthand for -gdb tcp::1234
356 -d item1,... enable logging of specified items (use '-d help' for a list of log items)
357 -D logfile output log to logfile (default stderr)
358 -dfilter range,.. filter debug output to range of addresses (useful for -d cpu,exec,etc..)
359 -L path set the directory for the BIOS, VGA BIOS and keymaps
360 -bios file set the filename for the BIOS
361 -enable-kvm enable KVM full virtualization support
362 -xen-domid id specify xen guest domain id
363 -xen-create create domain using xen hypercalls, bypassing xend
364 warning: should not be used when xend is in use
365 -xen-attach attach to existing xen domain
366 xend will use this when starting QEMU
367 -xen-domid-restrict restrict set of available xen operations
368 to specified domain id. (Does not affect
369 xenpv machine type).
370 -no-reboot exit instead of rebooting
371 -no-shutdown stop before shutdown
372 -loadvm [tag|id]
373 start right away with a saved state (loadvm in monitor)
374 -daemonize daemonize QEMU after initializing
375 -option-rom rom load a file, rom, into the option ROM space
376 -rtc [base=utc|localtime|date][,clock=host|rt|vm][,driftfix=none|slew]
377 set the RTC base and clock, enable drift fix for clock ticks (x86 only)
378 -icount [shift=N|auto][,align=on|off][,sleep=on|off,rr=record|replay,rrfile=<filename>,rrsnapshot=<snapshot>]
379 enable virtual instruction counter with 2^N clock ticks per
380 instruction, enable aligning the host and virtual clocks
381 or disable real time cpu sleeping
382 -watchdog model
383 enable virtual hardware watchdog [default=none]
384 -watchdog-action reset|shutdown|poweroff|inject-nmi|pause|debug|none
385 action when watchdog fires [default=reset]
386 -echr chr set terminal escape character instead of ctrl-a
387 -virtioconsole c
388 set virtio console
389 -show-cursor show cursor
390 -tb-size n set TB size
391 -incoming tcp:[host]:port[,to=maxport][,ipv4][,ipv6]
392 -incoming rdma:host:port[,ipv4][,ipv6]
393 -incoming unix:socketpath
394 prepare for incoming migration, listen on
395 specified protocol and socket address
396 -incoming fd:fd
397 -incoming exec:cmdline
398 accept incoming migration on given file descriptor
399 or from given external command
400 -incoming defer
401 wait for the URI to be specified via migrate_incoming
402 -only-migratable allow only migratable devices
403 -nodefaults don't create default devices
404 -chroot dir chroot to dir just before starting the VM
405 -runas user change to user id user just before starting the VM
406 user can be numeric uid:gid instead
407 -semihosting semihosting mode
408 -semihosting-config [enable=on|off][,target=native|gdb|auto][,arg=str[,...]]
409 semihosting configuration
410 -old-param old param mode
411 -sandbox on[,obsolete=allow|deny][,elevateprivileges=allow|deny|children]
412 [,spawn=allow|deny][,resourcecontrol=allow|deny]
413 Enable seccomp mode 2 system call filter (default 'off').
414 use 'obsolete' to allow obsolete system calls that are provided
415 by the kernel, but typically no longer used by modern
416 C library implementations.
417 use 'elevateprivileges' to allow or deny QEMU process to elevate
418 its privileges by blacklisting all set*uid|gid system calls.
419 The value 'children' will deny set*uid|gid system calls for
420 main QEMU process but will allow forks and execves to run unprivileged
421 use 'spawn' to avoid QEMU to spawn new threads or processes by
422 blacklisting *fork and execve
423 use 'resourcecontrol' to disable process affinity and schedular priority
424 -readconfig <file>
425 -writeconfig <file>
426 read/write config file
427 -no-user-config
428 do not load default user-provided config files at startup
429 -trace [[enable=]<pattern>][,events=<file>][,file=<file>]
430 specify tracing options
431 -enable-fips enable FIPS 140-2 compliance
432 -msg timestamp[=on|off]
433 change the format of messages
434 on|off controls leading timestamps (default:on)
435 -dump-vmstate <file>
436 Output vmstate information in JSON format to file.
437 Use the scripts/vmstate-static-checker.py file to
438 check for possible regressions in migration code
439 by comparing two such vmstate dumps.
440
441 Generic object creation:
442 -object TYPENAME[,PROP1=VALUE1,...]
443 create a new object of type TYPENAME setting properties
444 in the order they are specified. Note that the 'id'
445 property must be set. These objects are placed in the
446 '/objects' path.
447
448 During emulation, the following keys are useful:
449 ctrl-alt-f toggle full screen
450 ctrl-alt-n switch to virtual console 'n'
451 ctrl-alt toggle mouse and keyboard grab
452
453 When using -nographic, press 'ctrl-a h' to get some help.
454
455 See <https://qemu.org/contribute/report-a-bug> for how to report bugs.
456 More information on the QEMU project at <https://qemu.org>.
457 sun@machine:~/18.04-install/qemu-3.0.0/bin$
