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 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> 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, 25: IOMMU changes for VT-d Posted-Interrupts, such as, feature detection, command line parameter. 10-16, 21-24: Changes related to KVM itself. 17-19: 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" 20: x86 irq related changes Feng Wu (25): 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: 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: Update Posted-Interrupts descriptor during vCPU scheduling KVM: Change NDST field after vCPU scheduling KVM: Add the handler for Wake-up Vector 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 | 14 ++ 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 | 68 ++++++++ arch/x86/kvm/vmx.c | 251 +++++++++++++++++++++++++++- arch/x86/kvm/x86.c | 38 ++++- drivers/iommu/intel_irq_remapping.c | 64 +++++++ 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 | 43 +++++ include/uapi/linux/kvm.h | 10 + 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 | 14 ++ virt/kvm/vfio.c | 103 ++++++++++++ 30 files changed, 799 insertions(+), 27 deletions(-) create mode 100644 arch/x86/kvm/kvm_vfio_x86.c -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
