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 -- 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
