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    Subject[KVM PATCH v2 0/2] irqfd
    (Applies to kvm.git b59cd3560111)

    This series implements a mechanism called "irqfd". It lets you create
    an eventfd based file-desriptor to inject interrupts to the guest. We
    associate one gsi per fd for proper routing granularity.

    This is v2. Changes since v1

    *) Dropped notifier_chain based callbacks in favor of wait_queue_t::func
    and file::poll based callbacks (Thanks to Davide for the suggestion)


    We do not have a user of this interface in this series, though note
    future version of virtual-bus (v4 and above) will be based on this.

    The first patch will require mainline buy-in, particularly from Davide
    (cc'd). The last patch is kvm specific.

    kvm-userspace.git patch to follow.



    Gregory Haskins (2):
    kvm: add support for irqfd via eventfd-notification interface
    eventfd: export fget and signal interfaces for module use

    arch/x86/kvm/Makefile | 2 -
    arch/x86/kvm/x86.c | 1
    fs/eventfd.c | 3 +
    include/linux/kvm.h | 7 ++
    include/linux/kvm_host.h | 7 ++
    virt/kvm/irqfd.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++
    virt/kvm/kvm_main.c | 12 ++++
    7 files changed, 177 insertions(+), 1 deletions(-)
    create mode 100644 virt/kvm/irqfd.c


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