[PATCH 05/11] KVM: PPC: add GPR RA update skeleton for MMIO emulation

[Paul Mackerras]

On Wed, Apr 25, 2018 at 07:54:38PM +0800, wei.guo.simon at gmail.com wrote:
> From: Simon Guo <wei.guo.simon at gmail.com>
> 
> To optimize kvm emulation code with analyse_instr, adds new
> mmio_update_ra flag to aid with GPR RA update.
> 
> This patch arms RA update at load/store emulation path for both
> qemu mmio emulation or coalesced mmio emulation.

It's not clear to me why you need to do this.  The existing code
writes RA at the point where the instruction is decoded.  In later
patches, you change that so the RA update occurs after the MMIO
operation is performed.  Is there a particular reason why you made
that change?

Paul.