Bug 1804577

Summary: Backport: Passthrough host CPU microcode version to KVM guest if using CPU passthrough to RHEL 7.7/7.8 [rhel-7.6.z]
Product: Red Hat Enterprise Linux 7 Reporter: RAD team bot copy to z-stream <autobot-eus-copy>
Component: qemu-kvm-rhevAssignee: Maxim Levitsky <mlevitsk>
Status: CLOSED ERRATA QA Contact: Yumei Huang <yuhuang>
Severity: high Docs Contact:
Priority: high    
Version: 7.7CC: aarnold, bhull, cbrune, cpelland, jinzhao, juzhang, knoel, lconicel, loberman, mlevitsk, mtessun, nkoenig, pbonzini, pchavva, sfroemer, virt-maint
Target Milestone: rcKeywords: FeatureBackport, ZStream
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard:
Fixed In Version: qemu-kvm-rhev-2.12.0-18.el7_6.10 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 1791653 Environment:
Last Closed: 2020-06-01 06:41:23 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: 1791653    
Bug Blocks:    

Description RAD team bot copy to z-stream 2020-02-19 08:17:32 UTC 
This bug has been copied from bug #1791653 and has been proposed to be backported to 7.6 z-stream (EUS).
Comment 6 Yumei Huang 2020-04-15 05:28:35 UTC 
Verify:
qemu-kvm-rhev-2.12.0-18.el7_6.10
kernel-3.10.0-957.50.1.el7.x86_64 (both guest and host)
microcode_ctl-2.1-47.5.el7_6.x86_64

Boot guest with '-cpu host', check if microcode version is same between guest and host.  

On host,

# grep micro /proc/cpuinfo | uniq
microcode	: 0x5000021

Inside guest,

# grep micro /proc/cpuinfo | uniq
microcode	: 0x5000021


The microcode version in guest is same to host, so the bug is fixed.
Comment 10 errata-xmlrpc 2020-06-01 06:41:23 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/RHSA-2020:2342