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Bug 1481180 - iommu platform support for ipxe [rhel-7.4.z]
Summary: iommu platform support for ipxe [rhel-7.4.z]
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: ipxe
Version: 7.4
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: jason wang
QA Contact: FuXiangChun
URL:
Whiteboard:
Depends On: 1467887
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-08-14 10:05 UTC by Oneata Mircea Teodor
Modified: 2017-09-05 11:32 UTC (History)
13 users (show)

Fixed In Version: ipxe-20170123-1.git4e85b27.el7_4.1
Doc Type: Bug Fix
Doc Text:
Previously, guest virtual machines that use the iPXE environment were not able to boot over a network if the Input/Output Memory Management Unit (IOMMU) mode was set for the virtio-net device. With this update, iPXE handles IOMMU setting correctly, and guests are able to boot properly in the described scenario.
Clone Of: 1467887
Environment:
Last Closed: 2017-09-05 11:32:40 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2017:2589 0 normal SHIPPED_LIVE ipxe bug fix update 2017-09-05 15:20:31 UTC

Description Oneata Mircea Teodor 2017-08-14 10:05:17 UTC 
This bug has been copied from bug #1467887 and has been proposed to be backported to 7.4 z-stream (EUS).
Comment 3 Miroslav Rezanina 2017-08-17 07:07:45 UTC 
Fix included in ipxe-20170123-1.git4e85b27.el7_4.1
Comment 5 FuXiangChun 2017-08-24 07:39:21 UTC 
Verified component version as below:

ipxe-roms-qemu-20170123-1.git4e85b27.el7_4.1.noarch
ipxe-roms-20170123-1.git4e85b27.el7_4.1.noarch
ipxe-bootimgs-20170123-1.git4e85b27.el7_4.1.noarch

qemu-kvm-rhev-2.9.0-16.el7_4.5.x86_64
seabios-1.10.2-3.el7_4.1.x86_64
3.10.0-693.1.1.el7.x86_64

steps:

1. qemu-kvm cmd:
/usr/libexec/qemu-kvm ...

-device virtio-blk-pci,drive=system1,disable-legacy=on,disable-modern=off,id=boot_disk,iommu_platform=on,ats=on -drive file=/root/rhel74-bk.qcow2,format=qcow2,if=none,id=system1 \

-device virtio-net-pci,netdev=hostnet1,id=net1,mac=52:54:00:7e:af:e6,iommu_platform=on,disable-modern=off,disable-legacy=on -netdev tap,id=hostnet1,vhost=on \
....

2. Add "iommu=pt intel_iommu=on" to host kernel line

3. Add "intel_iommu=on" guest kernel line

Test result:
Guest can boot successfully via NIC.  and NIC works in guest.  

Hi Jason,
According to this test result. Can QE verify this bug?
Comment 6 FuXiangChun 2017-08-26 08:13:01 UTC 
Append a test result.

1. First, I try to reproduce this bug with unfix ipxe-roms-20170123-1.git4e85b27.el7.noarch.

result:
ipxe cann't find NIC, and output this message as below:
........
Cound not open net0: Invalid argument (http://ipxe.org/1c5c4002) No more network devices
.....

2. Then, I use fixed ipxe-roms-20170123-1.git4e85b27.el7_4.1.noarch to boot guest.  

result:

ipxe can find net0 correctly and connect dhcp server successfully.
Comment 7 FuXiangChun 2017-08-26 08:14:05 UTC 
According to comment5 & comment6. QE thinks this bug is fixed.
Comment 10 errata-xmlrpc 2017-09-05 11:32:40 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:2589
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