Re: [Xen-devel] [PATCH V2 1/7]: PVH: basic and header changes, elfnote changes, ...

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

On Fri, 12 Oct 2012 09:48:48 +0100
Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:

> > index fdce49c..9323b8c 100644
> > --- a/arch/x86/xen/Kconfig
> > +++ b/arch/x86/xen/Kconfig
> > @@ -50,3 +50,13 @@ config XEN_DEBUG_FS
> >       Enable statistics output and various tuning options in
> > debugfs. Enabling this option may incur a significant performance
> > overhead. 
> > +config XEN_X86_PVH
> > +   bool "Support for running as a PVH guest (EXPERIMENTAL)"
> > +   depends on X86_64 && XEN && INTEL_IOMMU && EXPERIMENTAL
> 
> OOI why does the kernel side require an INTEL_IOMMU? I can see why the
> hypervisor would need it but the guests (including dom0) can't
> actually see the underlying IOMMU, can they?

Well, the kernel requires the hypervisor to have it, but I guess
thats not what this is referring to. The tools can decide that.
I'll take it out.


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