Is there an 64 bit emulator for 64 bit host?

Message

er76 · Post by **er76** » Sat May 27, 2006 10:07 pm

I am in the middle of building a livecd for my amd64 machine, but I want to test it first in an emulator that emulates a 64 bit machine, does an emulator exist?

PaveQ · Post by **PaveQ** » Sun May 28, 2006 11:10 am

Qemu. But it _really_ emulates rather than virtualize, so it's really slow.

er76 · Post by **er76** » Mon May 29, 2006 4:07 pm

I have qemu, I been running 32 bit os's in it. Do I need someway tell it to run 64 bit mode or does it do it automatically?

I looked in the help options screen, I did not see an option for that.

dignome · Post by **dignome** » Tue May 30, 2006 5:58 pm

afaik qemu-system-x86_64 can use an accelerator such as kqemu perhaps even with -kernel-kqemu thus making it a virtualizer for both user and kernel code (qemu-0.8.1 + kqemu-1.3.0pre7 on 64bit host). This 64bit qemu target has a 32bit compatibility mode as well. If you have a 64bit host you must use this target even for 32bit guests.