[Top] [All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-devel] trap/interrupt gate for hypercall

  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
  • Date: Tue, 15 May 2007 22:43:05 +0800
  • Cc: "Liu, Jinsong" <jinsong.liu@xxxxxxxxx>
  • Delivery-date: Tue, 15 May 2007 07:41:29 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AceW/1gtu6fdM4mZSxqwxNTDwzvRGg==
  • Thread-topic: trap/interrupt gate for hypercall
Just a curious question about IDT descriptor type for hypercall. What's 
the reason to use interrupt-gate type (14) for hypercall (0x82) on 32bit

Xen? Is there any special requirement on interrupt disabled at entrance?

Interesting thing is the compat mode on 64bit Xen which use 64bit 
trap-gate type (15) for hypercall from 32bit guest...

Thanks,
Kevin

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

 

©2013 Xen Project, A Linux Foundation Collaborative Project. All Rights Reserved.
Linux Foundation is a registered trademark of The Linux Foundation.
Xen Project is a trademark of The Linux Foundation.

Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.