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. v3->v4: * Change capability to a int variant flags instead of a function call * Add hotplug case for VT-d PI Feng Wu (8): 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 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: Setup Posted-Interrupts capability for Intel iommu iommu, x86: define irq_remapping_cap() iommu, x86: Properly handler PI for IOMMU hotplug arch/x86/include/asm/irq_remapping.h | 11 +++++ drivers/iommu/intel_irq_remapping.c | 78 +++++++++++++++++++++++++++++++++- drivers/iommu/irq_remapping.c | 11 +++++ drivers/iommu/irq_remapping.h | 6 +++ include/linux/dmar.h | 32 ++++++++++++++ include/linux/intel-iommu.h | 1 + 6 files changed, 138 insertions(+), 1 deletions(-) -- 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/
