[PATCH v5 0/7] KVM: arm64: Implement API for vGICv3 live migration

[Pavel Fedin <p.fedin@samsung.com>]

This patchset adds necessary userspace API in order to support vGICv3 live
migration. GICv3 registers are accessed using device attribute ioctls,
similar to GICv2.

Whoever wants to test it, please note that this version is not
binary-compatible with previous one, the API has been seriously changed.
qemu patchess will be posted in some time.

v4 => v5:
- Adapted to new API by Peter Maydell, Marc Zyngier and Christoffer Dall.
  Acked-by's on the documentation were dropped, just in case, because i
  slightly adjusted it. Additionally, i merged all doc updates into one
  patch.

v3 => v4:
- Split pure refactoring from anything else
- Documentation brought up to date
- Cleaned up 'mmio' structure usage in vgic_attr_regs_access(),
  use call_range_handler() for 64-bit access handling
- Rebased on new linux-next

v2 => v3:
- KVM_DEV_ARM_VGIC_CPUID_MASK enlarged to 20 bits, allowing more than 256
  CPUs.
- Bug fix: Correctly set mmio->private, necessary for redistributor access.
- Added accessors for ICC_AP0R and ICC_AP1R registers
- Rebased on new linux-next

v1 => v2:
- Do not use generic register get/set API for CPU interface, use only
  device attributes.
- Introduce size specifier for distributor and redistributor register
  accesses, do not assume size any more.
- Lots of refactor and reusable code extraction.
- Added forgotten documentation

Christoffer Dall (1):
  KVM: arm/arm64: Update API documentation

Pavel Fedin (6):
  KVM: arm/arm64: Move endianess conversion out of
    vgic_attr_regs_access()
  KVM: arm/arm64: Refactor vGIC attributes handling code
  KVM: arm64: Implement vGICv3 distributor and redistributor access from
    userspace
  KVM: arm64: Refactor system register handlers
  KVM: arm64: Introduce find_reg_by_id()
  KVM: arm64: Implement vGICv3 CPU interface access

 Documentation/virtual/kvm/devices/arm-vgic-v3.txt | 117 ++++++++
 Documentation/virtual/kvm/devices/arm-vgic.txt    |  41 +--
 arch/arm64/include/uapi/asm/kvm.h                 |  17 +-
 arch/arm64/kvm/sys_regs.c                         |  83 +++---
 arch/arm64/kvm/sys_regs.h                         |   8 +-
 arch/arm64/kvm/sys_regs_generic_v8.c              |   2 +-
 include/linux/irqchip/arm-gic-v3.h                |  19 +-
 virt/kvm/arm/vgic-v2-emul.c                       | 124 ++------
 virt/kvm/arm/vgic-v3-emul.c                       | 343 +++++++++++++++++++++-
 virt/kvm/arm/vgic.c                               |  57 ++++
 virt/kvm/arm/vgic.h                               |   3 +
 11 files changed, 630 insertions(+), 184 deletions(-)
 create mode 100644 Documentation/virtual/kvm/devices/arm-vgic-v3.txt

-- 
2.4.4