Read IOMMU attributes from linux kernle 4.10.0 error. Cc: sta...@dpdk.org
Signed-off-by: Rosen Xu <rosen...@intel.com> --- doc/guides/rel_notes/known_issues.rst | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst index afcc2c4..74876ff 100644 --- a/doc/guides/rel_notes/known_issues.rst +++ b/doc/guides/rel_notes/known_issues.rst @@ -714,3 +714,24 @@ igb_uio can not be used when running l3fwd-power **Driver/Module**: ``igb_uio`` module. + + +linux kernel iommu attribute read error +--------------------------------------- + +**Description**: + Read immu attributes from /sys/devices/virtual/iommu/dmarXXX/intel-iommu/cap in linux kernel + 4.10.0 error. That because the link between the iommu sysfs-device and the struct intel_iommu + is no longer stored as driver-data. + +**Implication**: + When insmod ``vfio-pci`` and running testpmd APP, it doesn't initiate properly. + +**Resolution/Workaround**: + Use other linux kernel version. It only happens in linux kernel 4.10.0. + +**Affected Environment/Platform**: + ALL OS of linux kernel 4.10.0. + +**Driver/Module**: + ``vfio-pci`` module. -- 1.8.3.1