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doc: update system_config to include igb_uio.

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This will be a useful workaround for kernels which don't support binding
NVMe drives to uio_pci_generic.

Change-Id: Idf895882c1a5adb50935083c9176b3af0ddd637e
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/814
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Seth Howell 2020-02-11 12:46:35 -07:00 committed by Tomasz Zawadzki
parent b4aa3074bc
commit a95a92208d
1 changed files with 7 additions and 0 deletions
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doc/system_configuration.md
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@ -15,3 +15,10 @@ the IOMMU or to set it into passthrough mode prior to running `scripts/setup.sh`
To disable the IOMMU or place it into passthrough mode, add `intel_iommu=off`
or `amd_iommu=off` or `intel_iommu=on iommu=pt` to the GRUB command line on
x86_64 system, or add `iommu.passthrough=1` on arm64 systems.
There are also some instances where a user may not want to use `uio_pci_generic` or the kernel
version they are using has a bug where `uio_pci_generic` [fails to bind to NVMe drives](https://github.com/spdk/spdk/issues/399).
In these cases, users building with the DPDK submodule can build the `igb_uio` kernel module by
supplying `--with-igb-uio-driver` to `./configure`. Upon a successful make, the file will be
located at `dpdk/build/build/kmod/igb_uio.ko`. To ensure that the driver is properly bound, users
should specify `DRIVER_OVERRIDE=/path/to/igb_uio.ko`.