[Xen-devel] Re: [RFC PATCH 01/35] Add XEN config options and disable unsupported config options.

[Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>]

On Tue, May 09, 2006 at 07:47:12AM -0700, Daniel Walker wrote:
> On Tue, 2006-05-09 at 00:00 -0700, Chris Wright wrote:
> > The disabled config options are:
> > - DOUBLEFAULT: are trapped by Xen and not virtualized
> > - HZ: defaults to 100 in Xen VMs
> > - Power management: not supported in unprivileged VMs
> > - SMP: not supported in this set of patches
> > - X86_{UP,LOCAL,IO}_APIC: not supported in unprivileged VMs
> > 
> > +++ linus-2.6/arch/i386/Kconfig
> > @@ -55,6 +55,7 @@ menu "Processor type and features"
> >  
> >  config SMP
> >     bool "Symmetric multi-processing support"
> > +   depends on !X86_XEN
> >     ---help---
> >       This enables support for systems with more than one CPU. If you have
> >       a system with only one CPU, like most personal computers, say N. If
> > @@ -91,6 +92,12 @@ config X86_PC
> >     help
> >       Choose this option if your computer is a standard PC or compatible.
> >  
> > +config X86_XEN
> > +   bool "Xen-compatible"
> > +   help
> > +     Choose this option if you plan to run this kernel on top of the
> > +     Xen Hypervisor.
> > +
> 
> Couldn't you just add "depends on !SMP && .." to the config X86_XEN
> block ? 

I guess you could, but it would make it rather non-obvious and tedious
to enable X86_XEN then, wouldn't it?

    christian


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