Neil Horman wrote:
Can an APIC accept an NMI while already handling an NMI?  I didn't think they
would interrupt one another, but rather, pend until such time as the previous
NMI was cleared

The CPU certainly won't (there is a hidden flag that's cleared on IRET which disables NMI; it's possible to re-enable NMI by executing a dummy IRET inside the NMI handler.)

        -hpa
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