[PATCH 12/38] powerpc/booke: Provide exception macros with interrupt name
scottwood at freescale.com
Thu Mar 22 05:19:05 EST 2012
On 03/21/2012 01:04 PM, Kumar Gala wrote:
> On Feb 28, 2012, at 6:09 PM, Alexander Graf wrote:
>> From: Scott Wood <scottwood at freescale.com>
>> DO_KVM will need to identify the particular exception type.
>> There is an existing set of arbitrary numbers that Linux passes,
>> but it's an undocumented mess that sort of corresponds to server/classic
>> exception vectors but not really.
> So what do the new names correspond to?
The names are Linux-defined. The values are IVOR numbers.
> What header is defining MACHINE_CHECK, BOOKE_INTERRUPT_EXTERNAL, etc
Yes, it's asm/kvm_asm.h at the moment.
It's actually BOOKE_INTERRUPT_MACHINE_CHECK, etc. The exception macros
paste on BOOKE_INTERRUPT_ when they use it, to keep the macro users from
having to wrap lines even more often.
> If so we really should move these out of
> asm/kvm_asm.h and into something a bit more appropriate.
Yes, that was one of the things I had been planning to fix post-RFC.
Any preference what header it should be in? asm/reg_booke.h seems to be
the least bad option of the existing headers -- or perhaps move
head_booke.h to arch/powerpc/include/asm.
Long-term it would also be nice for this to replace, rather than
supplement, the current numbers, though as Ben pointed out there are a
number of places throughout the code that will have to be fixed for that
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