Re: [Qemu-devel] x86-64 port

[Gwenole Beauchesne <gbeauchesne@mandrakesoft.com>]

Hi,

> Nick Snellock wrote:
>> Is anyone working on an x86-64 port?
>
> Not me :-) An x86-64 host port would be very interesting because the 
> 64 bit host MMU could be used to remap the whole emulated 4GB address 
> space.

Fabrice, remember that I posted AMD64 support bits to the list some 
time ago? ;-) This works for user mode applications. As for the soft 
mmu, the current code is not 64-bit clean. I had some patches but they 
were not enough and are in a dormant state since. So remapping the 
whole 4GB address space is probably a faster and simpler fix indeed.

> I think that there is also a lot of potential for a "code-copy" mode 
> converting x86-32 to x86-64 code (look at what I did for . Along with 
> the 4GB space remapping, it would give close to native performances 
> without requiring any potentially unsafe kernel module (unlike the 
> popular virtualizers).

The popular virtualizers don't officially support AMD64 host systems 
yet. Vmware 4.5 is expected to do so though.