linux-kernel - Re: [Xen-devel] [RFC][PATCH 07/10] xen/hybrid: Add PV timer support

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Message-Id: <200909171354.52543.sheng@linux.intel.com>
Date:	Thu, 17 Sep 2009 13:54:51 +0800
From:	Sheng Yang <sheng@...ux.intel.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Keir Fraser <keir.fraser@...citrix.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	"xen-devel" <xen-devel@...ts.xensource.com>,
	Eddie Dong <eddie.dong@...el.com>,
	linux-kernel@...r.kernel.org, Jun Nakajima <jun.nakajima@...el.com>
Subject: Re: [Xen-devel] [RFC][PATCH 07/10] xen/hybrid: Add PV timer support

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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