[v5 00/19] Add VT-d Posted-Interrupts support

[Feng Wu <feng.wu@intel.com>]

VT-d Posted-Interrupts is an enhancement to CPU side Posted-Interrupt.
With VT-d Posted-Interrupts enabled, external interrupts from
direct-assigned devices can be delivered to guests without VMM
intervention when guest is running in non-root mode.

You can find the VT-d Posted-Interrtups Spec. in the following URL:
http://www.intel.com/content/www/us/en/intelligent-systems/intel-technology/vt-directed-io-spec.html

This series was part of http://thread.gmane.org/gmane.linux.kernel.iommu/7708. To make things clear, send out IOMMU part here.

This patch-set is based on the lastest x86/apic branch of tip tree.

Divide the whole series which contain multiple components into three parts:
- Prerequisite changes to irq subsystem (already merged)
- IOMMU part (already merged)
- KVM and VFIO parts (this series)

v5:
- Based on Alex and Eric's irq bypass manager:
https://lkml.org/lkml/2015/7/10/663
- Reuse some common patch from Eric

Eric Auger (3):
  KVM: create kvm_irqfd.h
  KVM: eventfd: add irq bypass information in irqfd
  KVM: eventfd: add irq bypass consumer management

Feng Wu (16):
  KVM: Extend struct pi_desc for VT-d Posted-Interrupts
  KVM: Add some helper functions for Posted-Interrupts
  KVM: Define a new interface kvm_intr_is_single_vcpu()
  KVM: Get Posted-Interrupts descriptor address from struct kvm_vcpu
  KVM: Add interfaces to control PI outside vmx
  KVM: Make struct kvm_irq_routing_table accessible
  KVM: make kvm_set_msi_irq() public
  vfio: Select IRQ_BYPASS_MANAGER for vfio PCI devices
  vfio: Register/unregister irq_bypass_producer
  KVM, x86: Select IRQ_BYPASS_MANAGER for KVM_INTEL
  KVM: x86: Update IRTE for posted-interrupts
  KVM: x86: Add arch specific routines for irqbypass manager
  KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd'
  KVM: Update Posted-Interrupts Descriptor when vCPU is preempted
  KVM: Update Posted-Interrupts Descriptor when vCPU is blocked
  KVM: Warn if 'SN' is set during posting interrupts by software

 arch/x86/include/asm/kvm_host.h     |  15 ++
 arch/x86/kvm/Kconfig                |   1 +
 arch/x86/kvm/irq_comm.c             |  28 +++-
 arch/x86/kvm/vmx.c                  | 278 +++++++++++++++++++++++++++++++++++-
 arch/x86/kvm/x86.c                  | 160 +++++++++++++++++++--
 drivers/vfio/pci/Kconfig            |   1 +
 drivers/vfio/pci/vfio_pci_intrs.c   |  19 +++
 drivers/vfio/pci/vfio_pci_private.h |   2 +
 include/linux/kvm_host.h            |  23 +++
 include/linux/kvm_irqfd.h           |  74 ++++++++++
 virt/kvm/eventfd.c                  | 115 ++++++---------
 virt/kvm/irqchip.c                  |  11 --
 virt/kvm/kvm_main.c                 |   3 +
 13 files changed, 632 insertions(+), 98 deletions(-)
 create mode 100644 include/linux/kvm_irqfd.h

-- 
2.1.0