[Xen-devel] vpt periodic timer and vhpet

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

Just noted vpt create_periodic_time is now changed to require
two parameters: period and delta, by 18694 which ports vhpet
to vpt framework. I'm not quite clear the necessity here. It doesn't
matter whether 1st expiration must be accurately hit. vhpet
main counter and per-channel comparators are updated only 
when guest tries to read. Is there any special tricks on hpet
since all other periodic timers are simply filling same value for 
period and delta?

I ask because we're considering some proactive timer alignment
besides existing range timer, while above change seems to implicate
something that we may neglect.

Thanks,
Kevin
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