kvmppc: instruction emulation

These patch series adds two kinds of instruction emulation tracking. A low overhead counter based mechanism extending kvm_stat (1/3) and a relayfs based full tracing of all instructions emulated (2/3). The last patch allows the already existant tlb tracing to be configurable (3/3) in the same manner. All together these features help to analyze guest behavior in the virtualized environment.

 arch/powerpc/kvm/Kconfig         |   17 +++++++
 arch/powerpc/kvm/emulate.c       |   84 +++++++++++++++++++++++++++++++++++++++
 arch/powerpc/kvm/powerpc.c       |   15 ++++++
 b/arch/powerpc/kvm/44x_tlb.c     |    2
 b/arch/powerpc/kvm/Kconfig       |    8 +++
 b/arch/powerpc/kvm/emulate.c     |   61 ++++++++++++++++++++++++++++
 b/arch/powerpc/kvm/powerpc.c     |   84 +++++++++++++++++++++++++++++++++++++++
 b/include/asm-powerpc/kvm_host.h |   40 ++++++++++++++++++
 b/include/asm-powerpc/kvm_ppc.h  |   50 +++++++++++++++++++++++
 9 files changed, 360 insertions(+), 1 deletion(-)

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