Got it. Thanks for the replying. 2016-04-28 17:03 GMT+08:00 Andrew Cooper <andrew.coop...@citrix.com>:
> On 28/04/16 09:53, George Dunlap wrote: > > On Thu, Apr 28, 2016 at 3:37 AM, Big Strong <fangtu...@gmail.com> wrote: > >> There is a #VE exception defined in p2086 of Intel Software Development > >> Manual, however, no definition of exception handler is availble in Xen > 4.6. > >> Should I define the handler by myself by modifying the source code of > xen, > >> or is there a way to define the handler of the reserved IDT vectors > (0-31, > >> #VE is 20) without modifying the source code? > > What are you actually trying to do? > > > > Xen shouldn't be generating #VEs itself, so it doesn't need a #VE > > handler. Those should only be generated by guests in HVM mode (if I'm > > remembering things correctly). In those cases the #VE will either be > > delivered directly to the guest, or it will cause a VMEXIT. > > Correct. #VE occurs from a EPT permission violation when appropriate > controls are set up, and are either become a VMEXIT or an in-guest #VE > depending on the .surpress_ve bit in a leaf epte. > > Unless you are nesting Xen inside another hypervisor on Intel hardware, > and have opted in to receiving #VE's, you won't encounter any. > > ~Andrew >
_______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
