From 15dedf321036ae67c61f35a3ab55de767b07801f Mon Sep 17 00:00:00 2001 From: Christian Ehrhardt Date: Fri, 1 Jun 2018 09:09:08 +0200 Subject: New upstream version 18.05 Change-Id: Ib515da8d5db1114f07a5fe26239d1c2061007c1c Signed-off-by: Christian Ehrhardt --- doc/guides/rel_notes/known_issues.rst | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'doc/guides/rel_notes/known_issues.rst') diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst index afcc2c44..716bd736 100644 --- a/doc/guides/rel_notes/known_issues.rst +++ b/doc/guides/rel_notes/known_issues.rst @@ -714,3 +714,28 @@ igb_uio can not be used when running l3fwd-power **Driver/Module**: ``igb_uio`` module. + + +Linux kernel 4.10.0 iommu attribute read error +---------------------------------------------- + +**Description**: + When VT-d is enabled (``iommu=pt intel_iommu=on``), reading IOMMU attributes from + /sys/devices/virtual/iommu/dmarXXX/intel-iommu/cap on Linux kernel 4.10.0 error. + This bug is fixed in `Linux commmit a7fdb6e648fb + `_, + This bug is introduced in `Linux commmit 39ab9555c241 + `_, + +**Implication**: + When binding devices to VFIO and attempting to run testpmd application, + testpmd (and other DPDK applications) will not initialize. + +**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. -- cgit 1.2.3-korg