Re: [Xen-ia64-devel][PATCH] Enable SMP on VTI domain.

[Tristan Gingold <Tristan.Gingold@xxxxxxxx>]

Le Mercredi 31 Mai 2006 11:08, Xu, Anthony a écrit :
> From: Tristan Gingold
>
> >Sent: 2006年5月31日 17:01
> >
> >> >I think Xen can
> >> >impose lid to the guest firmware.  Things will be a little simpler.
> >>
> >> I don't catch you, Could you explain in more detail?
> >
> >I think lid_2_vcpu is almost useless.  Like in paravirtualized, vcpuid
> > should be simply extracted from lid.
>
> You mean vcpuid is extracted from machine lid.
Yes.

> It may work for domU, because lsapic table is built by xen.
> But for VTI-domain, lsapic table is built by guest firmware, how can
> guest firmware get other LP's lid.
Same as on a real machine: SAL has to know LP's lid.
I simply think lids must be 0, 1, 2...

> So in VTI-domain, we should use vcpuid predefined by XEN and guest
> firmware.
Why can't they match ?

> Another concern is,
> If SMP guest is running on a UP platform, vcpus may have same vcpuid.
Why ?  IMHO this can never happen.

Tristan.

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