Re: [PATCH] x86-64: espfix for 64-bit mode *PROTOTYPE*

[H. Peter Anvin]

On 04/22/2014 04:39 PM, Andi Kleen wrote:
>> That simply will not work if you can take a #GP due to the "safe" MSR
>> functions from NMI and #MC context, which would be my main concern.
> 
> At some point the IST entry functions subtracted 1K while the
> handler ran to handle simple nesting cases.
> 
> Not sure that code is still there.

Doesn't help if you take an NMI on the first instruction of the #GP handler.

	-hpa


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