[Bug 206579] KVM with passthrough generates "BUG: kernel NULL pointer dereference" and crashes

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https://bugzilla.kernel.org/show_bug.cgi?id=206579

--- Comment #38 from muncrief (rmuncrief@xxxxxxxxxxxxxxx) ---

(In reply to Anthony from comment #37)
> ... I just wanted to check if I am missing anything on my side as I am not 100% sure on how to tell avic is working looking a trace, perf stat/live. ... 

You can tell if avic is working by executing "perf kvm stat live" and then
looking for "avic_incomplete_ipi" and "avic_unaccelerated_" in the VM-EXIT
column. If it's not working you'll see "vintr" instead.

By the way the way "avic_unaccelerated_" is actually
"avic_unaccelerated_access" in the code but evidently it gets truncated in the
perf command output.

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