This small series introduces the vfio_set_event_handler()
helper which allows to set up/tear down the VFIO signalling of eventfd
for ERR, REQ and INTX irq indices.

On top of that, a new irq index is planned to signal DMA faults
in nested mode use case. This would use exactly the same mechanics.

Eric Auger (2):
  vfio-pci: Introduce vfio_set_event_handler helper
  vfio-pci: Use vfio_set_event_handler in vfio_intx_enable

 hw/vfio/pci.c | 347 +++++++++++++++++++++-----------------------------
 1 file changed, 145 insertions(+), 202 deletions(-)

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2.20.1