RE: [v3 00/26] Add VT-d Posted-Interrupts support

[Wu, Feng]

Hi Paolo,

Could you please have a look at this series? Thanks a lot!

Thanks,
Feng

> -----Original Message-----
> From: Wu, Feng
> Sent: Friday, December 12, 2014 11:15 PM
> To: tglx@xxxxxxxxxxxxx; mingo@xxxxxxxxxx; hpa@xxxxxxxxx; x86@xxxxxxxxxx;
> gleb@xxxxxxxxxx; pbonzini@xxxxxxxxxx; dwmw2@xxxxxxxxxxxxx;
> joro@xxxxxxxxxx; alex.williamson@xxxxxxxxxx; jiang.liu@xxxxxxxxxxxxxxx
> Cc: eric.auger@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; Wu, Feng
> Subject: [v3 00/26] 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:
> http://www.intel.com/content/www/us/en/intelligent-systems/intel-technolog
> y/vt-directed-io-spec.html
> 
> v1->v2:
> * Use VFIO framework to enable this feature, the VFIO part of this series is
>   base on Eric's patch "[PATCH v3 0/8] KVM-VFIO IRQ forward control"
> * Rebase this patchset on
> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git,
>   then revise some irq logic based on the new hierarchy irqdomain patches
> provided
>   by Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
> 
> v2->v3:
> * Adjust the Posted-interrupts Descriptor updating logic when vCPU is
>   preempted or blocked.
> * KVM_DEV_VFIO_DEVICE_POSTING_IRQ -->
> KVM_DEV_VFIO_DEVICE_POST_IRQ
> * __KVM_HAVE_ARCH_KVM_VFIO_POSTING -->
> __KVM_HAVE_ARCH_KVM_VFIO_POST
> * Add KVM_DEV_VFIO_DEVICE_UNPOST_IRQ attribute for VFIO irq, which
>   can be used to change back to remapping mode.
> * Fix typo
> 
> This patch series is made of the following groups:
> 1-6: Some preparation changes in iommu and irq component, this is based on
> the
>      new hierarchy irqdomain logic.
> 7-9, 26: IOMMU changes for VT-d Posted-Interrupts, such as, feature
> detection,
>           command line parameter.
> 10-17, 22-25: Changes related to KVM itself.
> 18-20: Changes in VFIO component, this part was previously sent out as
> "[RFC PATCH v2 0/2] kvm-vfio: implement the vfio skeleton for VT-d
> Posted-Interrupts"
> 21: x86 irq related changes
> 
> Feng Wu (26):
>   genirq: Introduce irq_set_vcpu_affinity() to target an interrupt to a
>     VCPU
>   iommu: Add new member capability to struct irq_remap_ops
>   iommu, x86: Define new irte structure for VT-d Posted-Interrupts
>   iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip
>   x86, irq: Implement irq_set_vcpu_affinity for pci_msi_ir_controller
>   iommu, x86: No need to migrating irq for VT-d Posted-Interrupts
>   iommu, x86: Add cap_pi_support() to detect VT-d PI capability
>   iommu, x86: Add intel_irq_remapping_capability() for Intel
>   iommu, x86: define irq_remapping_cap()
>   KVM: change struct pi_desc for VT-d Posted-Interrupts
>   KVM: Add some helper functions for Posted-Interrupts
>   KVM: Initialize VT-d Posted-Interrupts Descriptor
>   KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI
>   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
>   KVM: kvm-vfio: User API for VT-d Posted-Interrupts
>   KVM: kvm-vfio: implement the VFIO skeleton for VT-d Posted-Interrupts
>   KVM: x86: kvm-vfio: VT-d posted-interrupts setup
>   x86, irq: Define a global vector for VT-d Posted-Interrupts
>   KVM: Define a wakeup worker thread for vCPU
>   KVM: Update Posted-Interrupts Descriptor when vCPU is preempted
>   KVM: Update Posted-Interrupts Descriptor when vCPU is blocked
>   KVM: Suppress posted-interrupt when 'SN' is set
>   iommu/vt-d: Add a command line parameter for VT-d posted-interrupts
> 
>  Documentation/kernel-parameters.txt        |   1 +
>  Documentation/virtual/kvm/devices/vfio.txt |   9 ++
>  arch/x86/include/asm/entry_arch.h          |   2 +
>  arch/x86/include/asm/hardirq.h             |   1 +
>  arch/x86/include/asm/hw_irq.h              |   2 +
>  arch/x86/include/asm/irq_remapping.h       |  11 ++
>  arch/x86/include/asm/irq_vectors.h         |   1 +
>  arch/x86/include/asm/kvm_host.h            |  12 ++
>  arch/x86/kernel/apic/msi.c                 |   1 +
>  arch/x86/kernel/entry_64.S                 |   2 +
>  arch/x86/kernel/irq.c                      |  27 ++++
>  arch/x86/kernel/irqinit.c                  |   2 +
>  arch/x86/kvm/Makefile                      |   2 +-
>  arch/x86/kvm/kvm_vfio_x86.c                |  77 +++++++++
>  arch/x86/kvm/vmx.c                         | 244
> ++++++++++++++++++++++++++++-
>  arch/x86/kvm/x86.c                         |  22 ++-
>  drivers/iommu/intel_irq_remapping.c        |  68 +++++++-
>  drivers/iommu/irq_remapping.c              |  24 ++-
>  drivers/iommu/irq_remapping.h              |   8 +
>  include/linux/dmar.h                       |  32 ++++
>  include/linux/intel-iommu.h                |   1 +
>  include/linux/irq.h                        |   7 +
>  include/linux/kvm_host.h                   |  46 ++++++
>  include/uapi/linux/kvm.h                   |  11 ++
>  kernel/irq/chip.c                          |  14 ++
>  kernel/irq/manage.c                        |  20 +++
>  virt/kvm/irq_comm.c                        |  43 ++++-
>  virt/kvm/irqchip.c                         |  11 --
>  virt/kvm/kvm_main.c                        |  15 ++
>  virt/kvm/vfio.c                            | 107 +++++++++++++
>  30 files changed, 795 insertions(+), 28 deletions(-)
>  create mode 100644 arch/x86/kvm/kvm_vfio_x86.c
> 
> --
> 1.9.1

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