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[Xen-devel] How to find the corresponding interrupt no in Dom0 for "pirq" in debugging info

  • To: xen-devel@xxxxxxxxxxxxx
  • From: openlui <openlui@xxxxxxx>
  • Date: Thu, 29 Jan 2015 17:00:18 +0800 (CST)
  • Delivery-date: Thu, 29 Jan 2015 09:00:46 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>

   By using "xl debug-keys" method or "xentrace" command we can dump detailed info of physical irq binding and handling, and in dumped dmesg info,  many lines will contain a "pirq" field. After looking up the code, I find the "pirq" is the value of "u.pirq.irq" field in struct evtchn. 
   However, this "pirq" doesn't equal to any interrupt no in Dom0's /proc/interrupt file. Could somebody give me some hint about how to find the relationship between interrupt no and "pirq" field in dmesg?  Thanks.

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