Bug 1732592

Summary:	[DDF] For Intel cards add 'enable VT-d for VFIO driver.'
Product:	Red Hat OpenStack	Reporter:	Direct Docs Feedback <ddf-bot>
Component:	documentation	Assignee:	Roger Heslop <rheslop>
Status:	CLOSED CURRENTRELEASE	QA Contact:	RHOS Documentation Team <rhos-docs>
Severity:	unspecified	Docs Contact:
Priority:	medium
Version:	13.0 (Queens)	CC:	cfields, dcadzow, rheslop
Target Milestone:	---	Keywords:	GSS-NFV-Escalation
Target Release:	---
Hardware:	All
OS:	All
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1746048 1746050 (view as bug list)		Environment:
Last Closed:	2019-08-27 15:17:42 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:
Bug Blocks:	1746048, 1746050

Description Direct Docs Feedback 2019-07-23 20:06:18 UTC

For Intel cards add 'enable VT-d for VFIO driver.'    

Reported by: rhn-support-cfields

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/network_functions_virtualization_planning_and_configuration_guide/ch-hardware-requirements#annotations:b4b5d678-62bc-4fa4-8128-7ae03097ddd1

Comment 1 Chris Fields 2019-07-23 20:12:39 UTC

We recently had a support case for a customer trying to use ovs-dpdk but had VT-d disabled.  Symptoms looked like this:

overcloud-computeo-0 ovs-vswitchd[49803]: ovs|00206|dpdk|ERR|EAL: Cannot open /dev/vfio/noiommu-1: Permission denied
overcloud-computeo-0 ovs-vswitchd[49803]: ovs|00207|dpdk|ERR|EAL: Driver cannot attach the device (0000:12:00.1)

This was fixed by enabling VT-d in bios.  See Intels doc here: https://doc.dpdk.org/guides-16.04/linux_gsg/nic_perf_intel_platform.html#bios-settings

Under section 7.1.2 Bios Settings

"Disable all virtualization options when you test the physical function of the NIC, and turn on VT-d if you wants to use VFIO."

Let's get "turn on VT-d for Intel nics if you want to use the VFIO driver" which is what we use for ovs-dpdk.

Comment 5 Roger Heslop 2019-08-27 15:17:42 UTC

Published: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/network_functions_virtualization_planning_and_configuration_guide/index#review_bios_settings

Comment 6 Chris Fields 2020-01-17 14:29:29 UTC

Yes, the published NFV guide looks good.