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Bug 1377958

Summary:	VFIO: include no-IOMMU mode - not supported [rhel-7.2.z]
Product:	Red Hat Enterprise Linux 7	Reporter:	Marcel Kolaja <mkolaja>
Component:	Driver Update Disk	Assignee:	Petr Oros <poros>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	7.3	CC:	alex.williamson, cye, dhoward, dyuan, ferruh.yigit, huding, jen, jherrman, jiaoyang, jishao, juzhang, kernel-eus-qe, knoel, lhuang, peterx, pezhang, qding, rhartman, rsibley, skozina, wchadwic, xfu, xiywang
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	kmod-vfio-0.3-3.el7fdb.x86_64.rpm	Doc Type:	Enhancement
Doc Text:	As a Technology Preview, this update adds No-IOMMU mode for virtual function I/O (VFIO) drivers. No-IOMMU mode provides the user with full user-space I/O (UIO) access to a direct memory access (DMA)-capable device without a I/O memory management unit (IOMMU). Note that in addition to not being supported, using this mode is not secure, due to the the lack of I/O management provided by IOMMU. However, it is recommended to use the VFIO No-IOMMU driver instead of UIO drivers, such as uio_pci_generic or igb_uio, for Red Hat Enterprise Linux guests that use the Data Plane Development Toolkit (DPDK) on hosts that use any of the following: - Single-root I/O virtualization (SR-IOV) - Open vSwitch-accelerated Data Plane Development Toolkit (OVS-DPDK)	Story Points:	---
Clone Of:	1299662	Environment:
Last Closed:	2017-02-14 16:14:29 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1299662
Bug Blocks:	1383822

Description Marcel Kolaja 2016-09-21 07:31:08 UTC

This bug has been copied from bug #1299662 and has been proposed
to be backported to 7.2 z-stream (EUS).

Comment 3 Jeff Nelson 2016-09-22 15:58:58 UTC

According to BZ1358853#c17, this has been solved in build kmod-vfio-0.3-3.el7fdb.x86_64.rpm:

>The installation path issue and #modprobe issue both have been fixed well
>with kmod-vfio-0.3-3.el7fdb.x86_64 in 7.2GA kernel(3.10.0-327.el7.x86_64)
>and 7.2.z kernel(3.10.0-327.41.1.el7.x86_64).

Comment 4 Whitney Chadwick 2016-09-22 17:27:58 UTC

Added the fast-datapath-rhel-7 flag and put to +