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19.8. Expert Options
This section provides information about expert options.
KVM Virtualization
-enable-kvm
QEMU-KVM supports only KVM virtualization and it is used by default if available. If -enable-kvm is used and KVM is not available, qemu-kvm fails. However, if -enable-kvm is not used and KVM is not available, qemu-kvm runs in TCG mode, which is not supported.
Disable Kernel Mode PIT Reinjection
-no-kvm-pit-reinjection
No Shutdown
-no-shutdown
No Reboot
-no-reboot
Serial Port, Monitor, QMP
-serial <dev>
-monitor <dev>
-qmp <dev>
Supported devices are:
- stdio - standard input/output
- null - null device
- file:<filename> - output to file.
- tcp:[<host>]:<port>[,server][,nowait][,nodelay] - TCP Net console.
- unix:<path>[,server][,nowait] - Unix domain socket.
- mon:<dev_string> - Any device above, used to multiplex monitor too.
- none - disable, valid only for -serial.
- chardev:<id> - character device created with -chardev.
Monitor Redirect
-mon <chardev_id>[,mode=[readline|control]][,default=[on|off]]
Manual CPU Start
-S
RTC
-rtc [base=utc|localtime|date][,clock=host|vm][,driftfix=none|slew]
Watchdog
-watchdog model
Watchdog Reaction
-watchdog-action <action>
Guest Memory Backing
-mem-prealloc -mem-path /dev/hugepages
SMBIOS Entry
-smbios type=0[,vendor=<str>][,<version=str>][,date=<str>][,release=%d.%d]
-smbios type=1[,manufacturer=<str>][,product=<str>][,version=<str>][,serial=<str>][,uuid=<uuid>][,sku=<str>][,family=<str>]
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