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

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Message-ID: <4AB149BA.1000106@goop.org>
Date:	Wed, 16 Sep 2009 13:25:30 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Sheng Yang <sheng@...ux.intel.com>
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 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
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