QEMU/Invocation

QEMU options

QEMU is called with the following commands on host systems with x86 processor architecture. The parameter Disk_image refers to the image of the first IDE hard disk (disk 0).

x86 architecture (32-bit):

Host ~ $  qemu-system-i386 [options] [disk_image] 

x86 architecture (64 bit):

Host ~ $  qemu-system-x86_64 [options] [disk_image] 

QEMU was called with 'qemu' before version 1.0.

Host ~ $  qemu [options] [disk_image] 

The kernel-based virtual machine is often called with kvm instead of qemu. This is confusing, because the Native Linux KVM Tool is also invoked like that as well. Some distributions call with qemu-system-x86_64 or qemu-kvm.

Help

-h shows the help

Debugging

-d item1,...

Writes the log file to stderr. The following options are passed with commas to the command like : qemu -d int,cpu use -d help to get a full list.

-d out_asm

Show generated host assembly code for each compiled Translation-Block (TB)

-d in_asm          

Show input assembly code for each compiled TB

-d op

Shows micro operations for each compiled TB

-d op_opt          

show micro ops after optimization

-d op_ind

Show micro ops before indirect lowering

-d int

Show interrupts/exceptions in short format

-d exec

Show trace before each executed TB (lots of logs)

-d cpu

Show CPU registers before entering a TB (lots of logs)

-d mmu

Log MMU-related activities

-d pcall

x86 only: show protected mode far calls/returns/exceptions

-d cpu_reset

show CPU state before CPU resets

-d unimp

Log unimplemented functionality

-d guest_errors

Log when the guest OS does something invalid (eg accessing a non-existent register)

-d page

Dump pages at beginning of user mode emulation

-d nochain

Do not chain compiled TBs so that "exec" and "cpu" show complete traces

Tracing

Configure like this :

   ./configure --enable-trace-backends=simple

Run like this :

   qemu -trace events=/tmp/events ... # your normal QEMU invocation