| 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: | |
| Bug Depends On: | 1299662 | ||
| Bug Blocks: | 1383822 | ||
|
Description
Marcel Kolaja
2016-09-21 07:31:08 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). Added the fast-datapath-rhel-7 flag and put to + |