Re: [win-pv-devel] [PATCH 04/10] Separate checking upcall_pending in shared info from EvtchnPoll

[Matt Wilson <msw@xxxxxxxxx>]

On Fri, Dec 12, 2014 at 09:45:07AM +0000, Paul Durrant wrote:
> > -----Original Message-----
> > From: win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx [mailto:win-pv-devel-
> > bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Matt Wilson
> > Sent: 12 December 2014 00:03
> > To: Paul Durrant
> > Cc: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> > Subject: Re: [win-pv-devel] [PATCH 04/10] Separate checking upcall_pending
> > in shared info from EvtchnPoll
> > 
[...]
> > On Wed, Dec 10, 2014 at 10:35:11AM -0800, Matt Wilson wrote:
> > 
> > What do you think about using the Viridian MSR for Virtual Processor
> > Index as I mentioned on xen-devel?
> > 
> >   http://lists.xenproject.org/archives/html/xen-devel/2014-
> > 12/msg01352.html
> > 
> 
> That should work, but if viridian is off then I'll still need a
> fall-back. Is viridian always on in EC2?

Yes, Viridian is on for Windows in EC2. Using the ACPI processor id
should be a reasonable fallback.

--msw

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