[PATCH RFC] powerpc: Implements MMIO emulation for lvx/stvx instructions

[Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>]

Hello!

This patch implements MMIO emulation for two instructions: lvx and stvx. I started to implement other instructions but I'd like to have this reviewed beforehand because this is my first patch here and I'll certainly have some rework/fixes :-).

Note: stvx is only storing 8 bytes, for some reason the code "vcpu->arch.paddr_accessed += run->mmio.len;", which adds the 8-byte offset after the first write is not making any difference (interesting that it works for load operations). I'm still investigating it but any idea about it will be appreciated.

Thank you very much,

Jose Ricardo Ziviani (1):
  KVM: PPC: Book3S: Add MMIO emulation for VMX instructions

 arch/powerpc/include/asm/kvm_host.h   |   2 +
 arch/powerpc/include/asm/kvm_ppc.h    |   4 +
 arch/powerpc/include/asm/ppc-opcode.h |   6 ++
 arch/powerpc/kvm/emulate_loadstore.c  |  32 +++++++
 arch/powerpc/kvm/powerpc.c            | 162 ++++++++++++++++++++++++++++++----
 5 files changed, 189 insertions(+), 17 deletions(-)

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2.7.4