On Sat, Aug 24, 2013 at 6:42 AM, richard -rw- weinberger <
richard.weinber...@gmail.com> wrote:
> On Fri, Aug 23, 2013 at 8:35 PM, Han <keepsim...@gmail.com> wrote:
> > Hi,
> >
> > I am using Linux kernel 2.6.27 for building UML kernel. It seems like
> > "arch/x86/kernel/tsc.c" is not built in and the symbol "cpu_khz" is not
> > available.
> >
> > My question is: what's the reason that "tsc.c" not included in UML? Is
> > there any config or simple way(patch?) to include it in UML?
>
> Simply because UML has no TSC.
>
[Han] I don't really understand why UML has no TSC. As I know, TSC is
accessible from user space process (on x86 at least) and I don't see any
obvious reason why UML does not support TSC. I might missed something.
I am trying to add TSC into UML kernel (2.6.27) for an experiment. Is
that a practical thing to do at all?
thanks
Han
> > I have not tried the same on the newer kernels yet as my target system
> uses
> > 2.6.27 only so I prefer to stick with 2.6.27 if possible.
> >
> > thanks
> > Han
> >
> >
> >
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>
> --
> Thanks,
> //richard
>
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