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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] trap/interrupt gate for hypercall
On 15/5/07 15:43, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote: > 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? Everything's an interrupt gate on 32-bit Xen, so that we can safely (atomically) save away guest segment register state. NMI is the only real pain, and I suppose MCE too. Coincidentally Jan just emailed about this very point. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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