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 implement some prerequisite parts for VT-d posted-interrupts. It was part of http://thread.gmane.org/gmane.linux.kernel.iommu/7708. To make things clear, I will divide the whole series which contain multiple components into three parts: - prerequisite changes (included in this series) - IOMMU part (v4 was reviewed, some comments need to be addressed) - KVM and VFIO parts (will send out this part once the first two parts are accepted) This series is rebased on the x86-apic branch of tip tree. v4 --> v5: - Move the declaration of "irq_chip_set_vcpu_affinity_parent()" to [1/3]. - Use the accessor to get "struct irq_data", "struct irq_chip". - Use "irq_get_desc_lock()" instead of "irq_to_desc()". - Declare "wakeup_handler_callback" in "asm/irq.h". - Use entering_ack_irq()/exiting_irq() in smp_kvm_posted_intr_wakeup_ipi(). Feng Wu (2): x86, irq: Implement irq_set_vcpu_affinity for pci_msi_ir_controller x86, irq: Define a global vector for VT-d Posted-Interrupts Jiang Liu (1): genirq: Introduce irq_set_vcpu_affinity() to target an interrupt to a VCPU 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.h | 4 ++++ arch/x86/include/asm/irq_vectors.h | 1 + arch/x86/kernel/apic/msi.c | 1 + arch/x86/kernel/entry_64.S | 2 ++ arch/x86/kernel/irq.c | 23 +++++++++++++++++++++++ arch/x86/kernel/irqinit.c | 2 ++ include/linux/irq.h | 6 ++++++ kernel/irq/chip.c | 14 ++++++++++++++ kernel/irq/manage.c | 21 +++++++++++++++++++++ 12 files changed, 79 insertions(+) -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
