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Re: [Xen-devel] Can VMWare modules run alongside in XEN kernel?



On Tue, Aug 14, 2007 at 02:04:43AM +0100, Mark Williamson wrote:
> > I would like to have VMware modules running in the XEN kernel, NOT in DOM0
> > kernel but outside at the hypervisor level, is that possible?
> 
> Nope, afraid that can't work.  Xen doesn't provide all the facilities that a 
> Linux kernel does, so it's not able to support Linux modules at all.  As you 
> noticed, it also doesn't allow loadable modules...

Urm, sure it does - whether the xen kernel allows modules or not is just a
KConfig setting. The XenSource kernel builds may not allow loadable modules
but all Fedora Xen kernels are fully modular. You're right that VMware won't
load/work, but that's a separate issue to the question of loadable module
support in general.

> The VMware modules really both need a) to run in ring0 (satisfied by your 
> suggestion) and to b) be supported by a full host Linux kernel.  
> Unfortunately, with Linux running in ring 1, whatever you do you are not 
> going to be able to satisfy both of these :-(

Might be able to run VMware inside a HVM/fullyvirt guest.

Dan.
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