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Re: [Xen-devel] About EVTCHNOP_bind_pirq requests

from [刘鹏程] [Permanent Link][Original]
To: ZelluX <zellux@xxxxxxxxx>
Subject: Re: [Xen-devel] About EVTCHNOP_bind_pirq requests
From: 刘鹏程 <pcliu.fd@xxxxxxxxx>
Date: Wed, 6 Jan 2010 11:05:58 +0800
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I guess after EVTCHNOP_bind_pirq, when corresponding pirq happens,
XEN will notify guest through evtchn.
 
Thanks
Pengcheng

2010/1/6 ZelluX <zellux@xxxxxxxxx>
Hi, all

I'm reading http://wiki.xensource.com/xenwiki/XenIntro and it says the IRQ_GUEST flag is set for all interrupts except for timer and serial interrupts. After reading some Xen source code I also find that IRQ_GUEST is only set by the EVTCHNOP_bind_pirq requests. So I'd like to know if these requests are called by the guest OS, and does Xen check if the requests are valid? (For example, what will happen if the guest OS tries to bind the timer interrupt pirq?)

Many thanks.

--
Best regards,
Wang Yuanxuan
Parallel Processing Institute, Fudan University

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