[dpdk-dev] [PATCH] bus/pci: always check IOMMU capabilities

David Christensen drc at linux.vnet.ibm.com
Fri Aug 2 19:13:49 CEST 2019

> David, Takeshi,
> Can you test your setups with (only) this patch?
> This should address both of your issues.

Correctly identifies my system as requiring PA mode:

sudo LD_LIBRARY_PATH=/home/davec/src/dpdk/build/lib 
/home/davec/src/dpdk/build/app/testpmd  --log-level="lib.*:debug" -w 
0000:01:00.0,txq_inline_min=0 -w 0000:01:00.1,txq_inline_min=0 -l 4-59 
-n 4 -- --rxq=8 --rxd=1024 --txq=8 --txd=4096 --nb-cores=16 -i -a --numa 
EAL: Detected lcore 0 as core 0 on socket 0
<snip> ...
EAL: Detected lcore 159 as core 2140 on socket 8
EAL: Support maximum 1536 logical core(s) by configuration.
EAL: Detected 160 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Module /sys/module/vfio_pci not found! error 2 (No such file or 
EAL: VFIO PCI modules not loaded
EAL: DPAA Bus not present. Skipping.
EAL: Bus pci wants IOVA as 'PA'
EAL: Bus dpaa_bus wants IOVA as 'DC'
EAL: Bus fslmc wants IOVA as 'DC'
EAL: Selected IOVA mode 'PA'

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