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[Xen-devel] [RFC v1 00/15] Add VT-d Posted-Interrupts support

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:

This patch set follow the following design:

Feng Wu (15):
  iommu: Add iommu_intpost to control VT-d Posted-Interrupts feature
  vt-d: VT-d Posted-Interrupts feature detection
  vmx: Extend struct pi_desc to support VT-d Posted-Interrupts
  vmx: Add some helper functions for Posted-Interrupts
  vmx: Initialize VT-d Posted-Interrupts Descriptor
  vt-d: Extend struct iremap_entry to support VT-d Posted-Interrupts
  vt-d: Add API to update IRTE when VT-d PI is used
  Update IRTE according to guest interrupt config changes
  Add a new per-vCPU tasklet to wakeup the blocked vCPU
  vmx: Define two per-cpu variants
  vmx: Add a global wake-up vector for VT-d Posted-Interrupts
  vmx: Properly handle notification event when vCPU is running
  Update Posted-Interrupts Descriptor during vCPU scheduling
  Suppress posting interrupts when 'SN' is set
  Add a command line parameter for VT-d posted-interrupts

 xen/arch/x86/hvm/vmx/vmcs.c            |   6 ++
 xen/arch/x86/hvm/vmx/vmx.c             | 185 ++++++++++++++++++++++++++++++++-
 xen/common/domain.c                    |  11 ++
 xen/common/schedule.c                  |   3 +
 xen/drivers/passthrough/io.c           |  77 +++++++++++++-
 xen/drivers/passthrough/iommu.c        |  17 ++-
 xen/drivers/passthrough/vtd/intremap.c |  83 +++++++++++++++
 xen/drivers/passthrough/vtd/iommu.c    |  15 ++-
 xen/drivers/passthrough/vtd/iommu.h    |  23 ++++
 xen/include/asm-x86/hvm/hvm.h          |   1 +
 xen/include/asm-x86/hvm/vmx/vmcs.h     |  16 ++-
 xen/include/asm-x86/hvm/vmx/vmx.h      |  49 ++++++++-
 xen/include/asm-x86/iommu.h            |   2 +
 xen/include/xen/iommu.h                |   2 +-
 xen/include/xen/sched.h                |   5 +
 15 files changed, 485 insertions(+), 10 deletions(-)


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