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 patchset adds the kvm-vfio interface for VT-d Posted-Interrrupts. In the second patch of this patchset, I leave function kvm_update_pi_irte() empty, since the purpose of this patch set is to implement the VFIO related stuff for VT-d PI. kvm_update_pi_irte() will do the real things, such as, updating IRTE. In fact, I think this function will be implemented in another file instead of vfio.c. At the current stage I just list it here to make the build successful. After some other dependencies (such as, irq core changes in Linux kernel) is resolved, I will send out the rest part of the VT-d PI patchset. This patchset is based on the following Eric's VFIO patchset: [PATCH v3 0/8] KVM-VFIO IRQ forward control v1->v2 - Re-use KVM_DEV_VFIO_DEVICE group for VT-d PI. - Define a new attribute in KVM_DEV_VFIO_DEVICE group. - Teach KVM about sturct pci_dev, and get host irq from it. Feng Wu (2): KVM: kvm-vfio: User API for VT-d Posted-Interrupts KVM: kvm-vfio: implement the VFIO skeleton for VT-d Posted-Interrupts Documentation/virtual/kvm/devices/vfio.txt | 9 ++ include/uapi/linux/kvm.h | 10 +++ virt/kvm/vfio.c | 115 ++++++++++++++++++++++++++++ 3 files changed, 134 insertions(+), 0 deletions(-) -- 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
