Messages in this thread | | | Date | Mon, 26 Apr 2021 07:51:04 -0700 | From | Andi Kleen <> | Subject | Re: [PATCH v2 2/2] KVM: VMX: Invoke NMI handler via indirect call instead of INTn |
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> > The original code "int $2" can provide the needed CPU-hidden-NMI-masked > > when entering #NMI, but I doubt it about this change. > > How would "int $2" block NMIs? The hidden effect of this change (and I > should have reviewed better the effect on the NMI entry code) is that the > call will not use the IST anymore.
My understanding is that int $2 does not block NMIs.
So reentries might have been possible.
-Andi
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