Re: [Xen-devel] Boot time trap handling

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 12/05/14 13:59, Jan Beulich wrote:
>>>> On 12.05.14 at 14:53, <andrew.cooper3@xxxxxxxxxx> wrote:
>> One point I forgot to say was that I plan to leave the reserved
>> exception vectors with non-present descriptors.  This way we get a fatal
>> GPF indicating the exact vector, rather than a PCPU lockup optionally
>> followed by an NMI watchdog timeout when another pcpu times out waiting
>> for the locked up pcpu to rendezvous in the time calibration code.
> This I'm not sure about. Replacing the simplistic handler is a must of
> course, but I would tend towards a generic exception handler wired
> up to fatal_trap() rather than having to decode the #GP error code
> to understand what's going on.
>
> Jan
>

Ok - I will make a formal entry point for each of the reserved exceptions.

~Andrew

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