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[Xen-devel] Altp2m misbehavior

Hello list:


Been playing with the altp2m code and noticed that it’s not behaving in Xen 4.7 tree.

Two changesets have been identified as where the be behavior changes.


The change is commit bd2239d9fa975a1ee5bcd27c218ae042cd0a57bc,

      x86/HVM: always intercept #AC and #DB

where an executable goes from working to crashing after a 10+ hypercalls.


The second change is in commit 484c14b7254e8d8936c05e3c28e332ea825c0155:

   x86/vmx: enable PML by default

This hangs the VM guest on the first few hypercalls.



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