On 04/22/2014 11:17 AM, Brian Gerst wrote:
>>
>> That is the entry condition that we have to deal with. The fact that
>> the switch to the IST is unconditional is what makes ISTs hard to deal with.
>
> Right, that is why you switch away from the IST as soon as possible,
> copying the data that is already pushed there to another stack so it
> won't be overwritten by a recursive fault.
>
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.
-hpa
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