No apport collect needed to discuss/enable this.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

** Changed in: linux (Ubuntu)
   Importance: Undecided => Wishlist

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https://bugs.launchpad.net/bugs/1634050

Title:
  Please enable CONFIG_VFIO_NOIOMMU

Status in dpdk package in Ubuntu:
  Incomplete
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hi,
  for certain cases a user might want to use VFIO in NO IOMMU mode.
  This only enables it to be an option, it doesn't change things unless 
"enable_unsafe_noiommu_mode" is set. See this reference: 
https://patchwork.kernel.org/patch/7906971/ for more details.

  This is used for some setups of DPDK see this http://dpdk-
  guide.gitlab.io/dpdk-guide/setup/binding.html#vfio-no-iommu

  Usually the reason to pick vfio over uio is the isolation. But there
  are some cases where vfio is required for extra features but can't
  work unless NO-IOMMU mode is used.

  I watched the topic a while checking if there is some major "oh crap
  what have we done" but there was none. An since by only enabling it in
  the kernel it shouldn't change a lot I wanted to ask if you could
  enable this config in the kernel for Z*.

  Technically it would be nice to get it in Yakkety as well, but I think
  we should be fine only working forward and enabling it in the Z
  release.

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