[patch][5/5] powerpc: Add the general support for Embedded Floating-Point instructions

[Kumar Gala]

On Jan 12, 2007, at 3:27 PM, Benjamin Herrenschmidt wrote:

>> I think its a fair assumption that nothing is going to interrupt the
>> handling of the exception, so its safe to assume the process causing
>> the interrupt will be the same one we return to.
>
> What about the get_user to get to the faulting instruction ? I suppose
> if those processors are UP only and we use an exception with EE
> disabled, there should be no way the page has been evicted since the
> access, so that should work, but will that ever be true ?

For UP we are ok, since nothing else can cause an invalidate.

How do we handle getting a fault when we are emulating any other  
instruction?

- k