[PATCH v1 0/2] KVM: arm64: single step emulation instructions

[Alex Bennée]

Hi Julian,

Here are the proposed patches for KVM support. Feel free to merge them
together if you want.

There are two minor wrinkles.

The first is we fake the HSR_EC value to keep QEMU happy. I don't
think this is a major problem because we aren't dealing with a guest
register but the mechanism for the guest debug to know what happened.
In this case we still single-stepped even if an exception wasn't
actually involved.

The second is we have to slightly munge the handling of return
kvm_handle_mmio_return to properly exit the loop on error or 0.

Alex Bennée (2):
  KVM: arm64: handle single-stepping trapped instructions
  kvm: arm64: handle single-step of userspace mmio instructions

 arch/arm/include/asm/kvm_host.h   |  2 ++
 arch/arm64/include/asm/kvm_host.h |  1 +
 arch/arm64/kvm/debug.c            | 21 ++++++++++++++++++
 arch/arm64/kvm/handle_exit.c      | 45 +++++++++++++++++++++++++++------------
 virt/kvm/arm/arm.c                |  2 +-
 virt/kvm/arm/mmio.c               |  3 ++-
 6 files changed, 58 insertions(+), 16 deletions(-)

-- 
2.14.1