KVM/ARM vGIC support

The following series implements support for the virtual generic interrupt controller architecture for KVM/ARM.

This patch series can also be pulled from:
git://github.com/virtualopensystems/linux-kvm-arm.git
branch: kvm-arm-v16-vgic

Changes since v5:
- Renamed sync_{to,from} to {flush,sync}_hwstate
- Fix read/write length for acceses shorter than words
- Cosmetic fixes

Changes since v4:
- Large number of commenting and formatting changes
- Don't rely on the vgic_hcr default value
- Fix bug in irq_fgx expand/collapse functions
- Sanitize use of bitmaps
- Do not use elrsr when queueing an interrupt
- Deassert SGIs and SPIs that have already been queued
- Set VMCR to 0 on vcpu init
- Compute number of list registers once at init time
- Restructure bytemap/bitmap accessor functions
- Improve readability by adding accessor functions
- Define GICH_ constants in gic.h and use these in the vgic code
- Explain SGI handling in comment
- Error patch and return value fixes and cleanups
- Use defines instead of all hardcoded IRQ numbers
- Refactor level interrupt handling
- Fix several maintenace-interrupt related bugs
- Add CPU hotplug notifier

Changes since v3:
- Change struct kvm_device_addr to use 64 bits for ID field

Changes since v2:
- Get rid of hardcoded guest cpu and distributor physical addresses and instead provide the address through the KVM_SET_DEVICE_ADDRESS ioctl.
- Fix level/edge bugs
- Fix reboot bug: retire queued, disabled interrupts

---

Christoffer Dall (3):
ARM: gic: add missing distributor defintions
KVM: ARM: Introduce KVM_SET_DEVICE_ADDRESS ioctl
ARM: KVM: VGIC accept vcpu and dist base addresses from user space

Marc Zyngier (10):
ARM: KVM: Keep track of currently running vcpus
ARM: gic: define GICH offsets for VGIC support
ARM: KVM: Initial VGIC infrastructure code
ARM: KVM: VGIC distributor handling
ARM: KVM: VGIC virtual CPU interface management
ARM: KVM: vgic: retire queued, disabled interrupts
ARM: KVM: VGIC interrupt injection
ARM: KVM: VGIC control interface world switch
ARM: KVM: VGIC initialisation code
ARM: KVM: Add VGIC configuration option

 Documentation/virtual/kvm/api.txt   |   38 +
 arch/arm/include/asm/hardware/gic.h |   29 +
 arch/arm/include/asm/kvm_host.h     |   18 
 arch/arm/include/asm/kvm_vgic.h     |  221 +++++
 arch/arm/include/uapi/asm/kvm.h     |   16 
 arch/arm/kernel/asm-offsets.c       |   12 
 arch/arm/kvm/Kconfig                |    8 
 arch/arm/kvm/Makefile               |    1 
 arch/arm/kvm/arm.c                  |  162 +++-
 arch/arm/kvm/interrupts.S           |    4 
 arch/arm/kvm/interrupts_head.S      |   74 ++
 arch/arm/kvm/mmio.c                 |    3 
 arch/arm/kvm/vgic.c                 | 1504 +++++++++++++++++++++++++++++++++++
 include/uapi/linux/kvm.h            |    8 
 14 files changed, 2085 insertions(+), 13 deletions(-)
 create mode 100644 arch/arm/include/asm/kvm_vgic.h
 create mode 100644 arch/arm/kvm/vgic.c