Messages in this thread | | | Date | Wed, 21 May 2014 11:46:26 +0200 | From | Borislav Petkov <> | Subject | Re: [RFC] x86_64: A real proposal for iret-less return to kernel |
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On Tue, May 20, 2014 at 07:39:31PM -0700, Andy Lutomirski wrote: > So the issue here is that we can have an NMI followed immediately by > an MCE.
That part might need clarification for me: #MC is higher prio interrupt than NMI so a machine check exception can interrupt the NMI handler at any point.
But you're talking only about the small window when nmi_mce_nest_count hasn't been incremented yet, right? I.e., this:
"The result is that the only interrupt that can happen with `nmi_mce_nest_count == 0` in NMI context is an MCE at the beginning or end of the NMI handler."
Correct?
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
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