https://bugs.dpdk.org/show_bug.cgi?id=1657
Bug ID: 1657
Summary: Unsuitable IOVA mode may be picked as the default
Product: DPDK
Version: 18.11
Hardware: All
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: core
Assignee: dev@dpdk.org
Reporter: nandinipersad...@gmail.com
Target Milestone: ---
Not all kernel drivers and not all devices support all IOVA modes. EAL will
attempt to pick a reasonable default based on a number of factors, but there
may be cases where the default may be unsuitable (for example, hotplugging
devices using igb_uio driver while having picked IOVA as VA mode on EAL
initialization).
Implication
Some devices (hotplugged or otherwise) may not work due to incompatible IOVA
mode being automatically picked by EAL.
Resolution/Workaround:
It is possible to force EAL to pick a particular IOVA mode by using the
–iova-mode command-line parameter. If conflicting requirements are present
(such as one device requiring IOVA as PA and one requiring IOVA as VA mode),
there is no workaround.
Affected Environment/Platform:
Linux.
Driver/Module:
ALL.
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