Bug 1869209

Summary:	[RHV 4.4] Change in CPU model name after RHVH upgrade
Product:	Red Hat Enterprise Virtualization Manager	Reporter:	Ulhas Surse <usurse>
Component:	vdsm	Assignee:	Milan Zamazal <mzamazal>
Status:	CLOSED ERRATA	QA Contact:	Qin Yuan <qiyuan>
Severity:	high	Docs Contact:
Priority:	high
Version:	4.4.1	CC:	ahadas, imomin, lsurette, mavital, michal.skrivanek, mzamazal, pelauter, qiyuan, sgoodman, sigbjorn.lie, srevivo, ycui
Target Milestone:	ovirt-4.4.2	Flags:	mavital: needinfo+ qiyuan: needinfo-
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	rhv-4.4.2-4	Doc Type:	Bug Fix
Doc Text:	Before this update, adding hosts with newer Intel CPUs to IBRS family clusters could fail, and the spec_ctrl flag was not detected. This update resolves the issue and you can now add hosts with modern Intel CPUs to the IBRS family clusters and the spec_ctrl flag is detected.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-09-23 16:11:41 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	Virt	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Ulhas Surse 2020-08-17 09:52:32 UTC

Description of problem:

1] After upgrading /Installing RHVH 4.4, the libvirt is identifying CPU name as Cascadelake-Server for Skylake server. 

2] It is also failing to add in the cluster due to missing feature spec_ctrl. 

 
Version-Release number of selected component (if applicable):
RHV 4.4

How reproducible:
Always

Steps to Reproduce:
1. Install RHVH 4.4
2. Try to add in IBRS family cluster
3. It fails and complains CPU flag is missing

Actual results:
The host is not added in the cluster

Expected results:
Host should come UP in the customer. 


Additional info:

Comment 2 Arik 2020-08-20 08:44:18 UTC

Milan, duplicate of bz 1854922?

Comment 3 Milan Zamazal 2020-08-20 08:58:27 UTC

Yes, it looks the same.

Comment 11 Qin Yuan 2020-08-27 10:16:58 UTC

Verified with:
vdsm-4.40.25-1.el8ev.x86_64
ovirt-engine-4.4.2.3-0.6.el8ev.noarch
redhat-virtualization-host-4.4.2-20200812.3.el8_2

Steps:
1. Test with Cascadelake Server(Intel(R) Xeon(R) Silver 4210 CPU @ 2.20GHz)
1) install RHVH 4.4 on the server:
[root@dell-per740xd-13 ~]# virsh -r capabilities
<capabilities>
  <host>
    <uuid>4c4c4544-004a-5410-8035-b4c04f593233</uuid>
    <cpu>
      <arch>x86_64</arch>
      <model>Cascadelake-Server</model>
      <vendor>Intel</vendor>
      <microcode version='83898113'/>

[root@dell-per740xd-13 ~]# cat /sys/devices/cpu/caps/pmu_name
skylake

[root@dell-per740xd-13 ~]# rpm -qa |grep micro
microcode_ctl-20191115-4.20200609.1.el8_2.x86_64

2) create 4.3 cluster with cpu type Intel Skylake Server IBRS SSBD MDS Family on 4.4 engine, add host to cluster
3) create 4.4 cluster with cpu type Secure Intel Skylake Server Family on 4.4 engine, add host to cluster

2. Test with Skylake server(Intel(R) Xeon(R) Silver 4110 CPU @ 2.10GHz)
1) install RHVH 4.4 on the server:
[root@dell-per740-28 ~]# virsh -r capabilities
<capabilities>
  <host>
    <uuid>01b4ad6e-1900-4101-8eea-bcfcfe9dee67</uuid>
    <cpu>
      <arch>x86_64</arch>
      <model>Skylake-Server-IBRS</model>
      <vendor>Intel</vendor>
      <microcode version='33581318'/>

[root@dell-per740-28 ~]# cat /sys/devices/cpu/caps/pmu_name
skylake

[root@dell-per740-28 ~]# rpm -qa |grep micro
microcode_ctl-20191115-4.20200609.1.el8_2.x86_64

2) create 4.3 cluster with cpu type Intel Skylake Server IBRS SSBD MDS Family on 4.4 engine, add host to cluster
3) create 4.4 cluster with cpu type Secure Intel Skylake Server Family on 4.4 engine, add host to cluster

Results:
1. Can add RHVH 4.4 Cascadelake server to 4.3 cluster with cpu type Intel Skylake Server IBRS SSBD MDS Family on 4.4 engine
2. Can add RHVH 4.4 Cascadelake server to 4.4 cluster with cpu type Secure Intel Skylake Server Family on 4.4 engine
3. Can add RHVH 4.4 Skylake server to 4.3 cluster with cpu type Intel Skylake Server IBRS SSBD MDS Family on 4.4 engine
4. Can add RHVH 4.4 Skylake server to 4.4 cluster with cpu type Secure Intel Skylake Server Family on 4.4 engine

Comment 15 errata-xmlrpc 2020-09-23 16:11:41 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 (Moderate: Red Hat Virtualization security, bug fix, and enhancement update), 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/RHSA-2020:3807