Current KVM code has lots of old redundancies, which can be cleaned up.
This patchset is actually a better alternative to, which allows to
keep piggy-backed LRs. The idea is based on the fact that our code also
maintains LR state in elrsr, and this information is enough to track LR

In case of problems this series can be applied partially, each patch is
a complete refactoring step on its own.

Thanks to Andre Przywara for pinpointing some 4.3+ specifics.

This version has been tested on SMDK5410 development board
(Exynos5410 SoC).

v3 => v4:
- Reordered changes for purpose of better understanding and bisection. All
  changes related to vgic_retire_lr() are gathered in one patch now.

v2 => v3:
- Removed two unused variables in __kvm_vgic_flush_hwstate(), overlooked
  leftover from v1.

v1 => v2:
- Rebased to kvmarm/next of 23.10.2015.
- Do not use vgic_retire_lr() for initializing ELRSR bitmask, because now
  it also handles pushback of PENDING state, use direct initialization
  instead (copied from Andre's patchset).
- Took more care about vgic_retire_lr(), which has deserved own patch.

Pavel Fedin (3):
  KVM: arm/arm64: Optimize away redundant LR tracking
  KVM: arm/arm64: Clean up vgic_retire_lr() and surroundings
  KVM: arm/arm64: Merge vgic_set_lr() and vgic_sync_lr_elrsr()

 include/kvm/arm_vgic.h |   7 ----
 virt/kvm/arm/vgic-v2.c |   6 +--
 virt/kvm/arm/vgic-v3.c |   6 +--
 virt/kvm/arm/vgic.c    | 104 +++++++++++++------------------------------------
 4 files changed, 29 insertions(+), 94 deletions(-)


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