[dpdk-dev] [PATCH v1 0/5] Enable hotplug in vfio

[Jeff Guo <jia.guo@intel.com>]

As we may know that the process of hotplug is different between igb_uio
and vfio. For igb_uio, it could use uevent notification and memory
failure handle mechanism for hotplug. But for vfio, when device is be
hotplug-out, the uevent can not be detected immediately, because of the
vfio kernel module will use a special mechanism to guaranty the pci
device would not be deleted until the user space release the resources,
so it will use another event “req notifier” at first to notify user space
to release resources for hotplug.

This patch will add a new interrupt type of req notifier in eal interrupt,
and add the new interrupt handler in pci device to handle the req device
event. When the req notifier be detected, it can trigger the device event
callback process to process for hotplug. With this mechanism, hotplug
could be enable in vfio.

Jeff Guo (5):
  eal: add a new req notifier to eal interrupt
  eal: add a new req event to device event
  eal: modify device event callback process func
  pci: add req handler field to generic pci device
  vfio: enable vfio hotplug by req notifier handler

 drivers/bus/pci/linux/pci_vfio.c                   | 104 +++++++++++++++++++++
 drivers/bus/pci/pci_common.c                       |  10 ++
 drivers/bus/pci/rte_bus_pci.h                      |   1 +
 lib/librte_eal/common/eal_common_dev.c             |   5 +-
 lib/librte_eal/common/eal_private.h                |  12 ---
 lib/librte_eal/common/include/rte_dev.h            |  20 +++-
 lib/librte_eal/common/include/rte_eal_interrupts.h |   1 +
 lib/librte_eal/linuxapp/eal/eal_dev.c              |   2 +-
 lib/librte_eal/linuxapp/eal/eal_interrupts.c       |  71 ++++++++++++++
 lib/librte_ethdev/rte_ethdev.c                     |   3 +-
 10 files changed, 212 insertions(+), 17 deletions(-)

-- 
2.7.4