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Re: [Xen-devel] NMI delivery not correctly working



On 25/7/07 07:43, "Kaushik Barde" <Kaushik_Barde@xxxxxxxxxxx> wrote:

> Thanks. 
>  
>>> 
> via masking of maskable interrupts
> <<
> What I'd meant there was all other interrupts are masked (by processor during
> NMI handling) except for NMI.

NMIs *are* masked by x86 CPU from when an NMI is delivered to the CPU until
after that CPU next executes an IRET. The CPU has a special NMI mask for
this purpose (not directly architecturally visible). It's unrelated to
EFLAGS.IF.

 -- Keir


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