[PATCH 1/3] KVM: PPC: Book3S: Change interrupt call to reduce scratch space use on HV

[Paul Mackerras]

On Thu, Dec 22, 2016 at 04:29:25AM +1000, Nicholas Piggin wrote:
> Change the calling convention to put the trap number together with
> CR in two halves of r12, which frees up HSTATE_SCRATCH2 in the HV
> handler.
> 
> The 64-bit PR handler entry translates the calling convention back
> to match the previous call convention (i.e., shared with 32-bit), for
> simplicity.
> 
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Acked-by: Paul Mackerras <paulus at ozlabs.org>

I notice that I forgot to add the code to save CFAR to the
__KVM_HANDLER_SKIP macro.  We should fix that.

Paul.