Xen devel - Mar 2005 - Interest in running ReactOS and Windows under Xen

Hello,
Is there any interest in running Windows under Xen? I know some work was done in
the past to
support it but due to license issues it had to be pulled. Might I suggest taking
a look at
adapting ReactOS to Xen and maybe developing a shared driver or HAL that can be
used for both
ReactOS and Windows.

Thanks
Steven



		
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> Is there any interest in running Windows under Xen?
Definitely.  Eventually the Vanderpool support should enable this.

Last I heard, it was thought that it *might* be possible to get Windows to run 
under Xen on non-VT hardware but I don''t think anyone here has anywhere
near
the spare cycles required to investigate this/
> I know some work was 
> done in the past to support it but due to license issues it had to be
> pulled. Might I suggest taking a look at adapting ReactOS to Xen and maybe
> developing a shared driver or HAL that can be used for both ReactOS and
> Windows.
A ReactOS port has been mentioned before - it''s a good idea but needs 
volunteers to make it happen.  As you say, a nice benefit is that code 
related to the ReactOS port (e.g. the virtual device drivers) could be reused 
for Windows.

Cheers,
Mark


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Hi Mark,

--- Mark Williamson <maw48@cl.cam.ac.uk> wrote:
> Definitely.  Eventually the Vanderpool support should enable this.
> 
> Last I heard, it was thought that it *might* be possible to get Windows to
run
> under Xen on non-VT hardware but I don''t think anyone here has
anywhere near
> the spare cycles required to investigate this/
I am still new to the learning curve on Xen. I''ll look in to it a bit
and see what
I can figure out.
> A ReactOS port has been mentioned before - it''s a good idea but
needs
> volunteers to make it happen.  As you say, a nice benefit is that code 
> related to the ReactOS port (e.g. the virtual device drivers) could be
reused
> for Windows.
Yes. The problem with most of the ReactOS team is that most of the effort has
been
focused on Qemu. None of our developers are interested in porting ReactOS to use
the Hypercall stuff. We are still working on just making ReactOS stable
<g>.

Thanks
Steven



	
		
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> > Last I heard, it was thought that it *might* be possible to get
Windows
> > to run under Xen on non-VT hardware but I don''t think anyone
here has
> > anywhere near the spare cycles required to investigate this/
>
> I am still new to the learning curve on Xen. I''ll look in to it a
bit and
> see what I can figure out.
The idea was (I think) that it *might* just be possible to use full shadow 
mode, plus trapping and emulating instructions in Xen in order to deal with 
all the bits of Windows it''s not possible to modify...
> > A ReactOS port has been mentioned before - it''s a good idea
but needs
> > volunteers to make it happen.  As you say, a nice benefit is that code
> > related to the ReactOS port (e.g. the virtual device drivers) could be
> > reused for Windows.
>
> Yes. The problem with most of the ReactOS team is that most of the effort
> has been focused on Qemu. None of our developers are interested in porting
> ReactOS to use the Hypercall stuff. We are still working on just making
> ReactOS stable <g>.
Makes sense to use QEmu, since you also (obviously) want to run on real 
hardware ;-)  It would be well cool to have ReactOS running on Xen too 
someday.  Perhaps when both projects have grown some more...

Cheers,
Mark


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--- Mark Williamson <maw48@cl.cam.ac.ukukwrote:
> The idea was (I think) that it *might* just be possible to use full shadow 
> mode, plus trapping and emulating instructions in XeXenn order to deal with
> all the bits of Windows it''s not possible to modify...
I hope so. I have been talking it over with some of the ReReactOSuys and there
may
be one of two that have interest. They are currently looking for a company that
is interested in adapting Windows to XeXeno spsponsorhe effort.
> Makes sense to use QEQEmusince you also (obviously) want to run on real 
> hardware ;-)  It would be well cool to have ReReactOSunning on XeXenoo 
> someday.  Perhaps when both projects have grown some more...
It already works well in QEQEmund VMVMwareut we get a lot of requests from
the Linux community for more of a direct port to Linux and XeXenight be the
solution.
Captive-NTNTFSort of did this by making a copy of ReReactOStntoskrnlun in
ususerspaceand allowing
it to load the Windows NTNTFSys. The idea is that if you could make ReReactOS
run as a subsystem of Linux then you might get better cocompatiblityith Windows 
applications then just trying to run all of Wine in ususerspace.epespeciallyith
all
of the changes to the Windows design in the past few years.

Thanks
Steven


		
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