Re: [Xen-devel] [PATCH 3/3] x86/xen: sync the CMOS RTC as well as the Xen wallclock

[John Stultz <john.stultz@xxxxxxxxxx>]

On 05/14/2013 12:57 AM, Jan Beulich wrote:
> > > > On 14.05.13 at 02:52, John Stultz <john.stultz@xxxxxxxxxx> wrote:
> > Honestly, it seems a little strange to me. If you're running as dom0,
> > why does HYPERVISOR_dom0_op() not cause the hypervisor to set the cmos
> > its virtualizing? This seems to mess with the proper virtualization
> > layering.
> Thy hypervisor tries to control as little system and peripheral devices
> as possible, and the CMOS (including the clock) is among those not
> controlled by it, but by Dom0.
Huh. So what does calling HYPERVISOR_dom0_op do then?

Either way, I don't have the context to insightfully review this, so 
I'll want this to get some Acked-bys from additional Xen folks before I 
queue it.
thanks
-john


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