https://bugs.dpdk.org/show_bug.cgi?id=76
Bug ID: 76
Summary: 2MB hugepages with IOMMU and passthrough not working
Product: DPDK
Version: 18.05
Hardware: All
OS: All
Status: CONFIRMED
Severity: normal
Priority: Normal
Component: core
Assignee: dev@dpdk.org
Reporter: kevu...@gmail.com
Target Milestone: ---
With this combination, when testpmd is run in the guest after some initial
packets (< 1000), all other packets are Rx-missed. Working in 18.02.0, not
working in 18.05.0 or master (711f43ba568ac).
i.e. combination of below in libvirt xml, with 2MB hugepages in guest not
working.
<hostdev mode='subsystem' type='pci' managed='yes'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</source>
<address type='pci' domain='0x0000' bus='0x06' slot='0x00'
function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='yes'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x1'/>
</source>
<address type='pci' domain='0x0000' bus='0x07' slot='0x00'
function='0x0'/>
</hostdev>
...
<iommu model='intel'>
<driver intremap='on' caching_mode='on' iotlb='on'/>
</iommu>
Working if remove IOMMU or switch to 1GB hugepages in guest. Tested with
82599ES.
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