Re: [Qemu-devel] Merging improvements from VirtualBox OSE into qemu?

[Jernej Simončič]

On Wednesday, December 24, 2008, 15:33:51, Liraz Siri wrote:

> I don't really understand the implementation VirtualBox uses to
> accomplish running 64bit VM guests on a 32bit host. Is it possible
> VirtualBox have figured out how to run 64bit instructions on a host
> running in 32bit mode? (otherwise they'll need to be doing some kind of
> emulation)

VirtualBox isn't the only one that supports this - VMWare also lets
you run 64bit guests on 32bit hosts.

> Testing this VirtualBox feature on hardware that doesn't support 64bit
> instructions will be revealing...

AFAIK, VirtualBox requires hardware virtualisation support for running
64bit guests, so you'll have to find a Core Duo CPU somewhere (which
are AFAIK, the only 32-bit CPUs that have hardware virtualisation
support).

-- 
< Jernej Simončič ><><><><>< http://eternallybored.org/ >

If you drop something, it will never reach the ground.
       -- Femo's Law Of Automotive Engine Repairing