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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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