Messages in this thread | | | From | Sheng Yang <> | Subject | Re: [PATCH V3] perf & kvm: Enhance perf to collect KVM guest os statistics from host side | Date | Tue, 20 Apr 2010 11:32:55 +0800 |
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On Monday 19 April 2010 16:25:17 Avi Kivity wrote: > On 04/17/2010 09:12 PM, Avi Kivity wrote: > > I think you were right the first time around. > > Re-reading again (esp. the part about treatment of indirect NMI > vmexits), I think this was wrong, and that the code is correct. I am > now thoroughly confused. > My fault...
To my understanding now, "If an event causes a VM exit directly, it does not update architectural state as it would have if it had it not caused the VM exit:", means: in NMI case, NMI would involve the NMI handler, and change the "architectural state" to NMI block. In VMX non-root mode, the behavior of calling NMI handler changed(determine by some VMCS fields), but not the affection to the "architectural state". So the NMI block state would remain the same.
-- regards Yang, Sheng
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