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
