From: Sheng Yang <sheng@linux.intel.com>
Organization: Intel Opensource Technology Center
To: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: [Xen-devel] [RFC][PATCH 07/10] xen/hybrid: Add PV timer support
Date: Thu, 17 Sep 2009 13:54:51 +0800
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Cc: Keir Fraser <keir.fraser@eu.citrix.com>,
       Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>,
       "xen-devel" <xen-devel@lists.xensource.com>,
       Eddie Dong <eddie.dong@intel.com>, linux-kernel@vger.kernel.org,
       Jun Nakajima <jun.nakajima@intel.com>
References: <1253090551-7969-1-git-send-email-sheng@linux.intel.com> <1253090551-7969-8-git-send-email-sheng@linux.intel.com> <4AB149BA.1000106@goop.org>
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On Thursday 17 September 2009 04:25:30 Jeremy Fitzhardinge wrote:
> On 09/16/09 01:42, Sheng Yang wrote:
> > If we have event channel, we can use VIRQ_TIMER to deliver timer
> > interrupt, otherwise we would reuse IRQ0.
>
> What's the purpose of this?  Why can we get a timer virq via event
> channel as usual?  I'm very dubious about having any platform
> interrupts/apic interaction in this code.
>
>     J

Before this patch, we didn't enable event channel for hybrid guest. But I 
think it's reasonable to enable it. Separating the event channel patch into 
two, one for generic usage, and another one QEmu devices. I would try to do 
this.

-- 
regards
Yang, Sheng
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