Bug 1804579

Summary: Backport: Passthrough host CPU microcode version to KVM guest if using CPU passthrough to RHEL 7.7/7.8 [rhel-7.7.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 CURRENTRELEASE QA Contact: liunana <nanliu>
Severity: high Docs Contact:
Priority: high    
Version: 7.7CC: aarnold, bhull, cbrune, cpelland, jinzhao, juzhang, knoel, loberman, mrezanin, mtessun, nkoenig, pbonzini, sfroemer, virt-maint, yuhuang
Target Milestone: rcKeywords: FeatureBackport, ZStream
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard:
Fixed In Version: qemu-kvm-rhev-2.12.0-33.el7_7.11 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 1791653 Environment:
Last Closed: 2022-05-06 10:18:33 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 08:18:04 UTC 
This bug has been copied from bug #1791653 and has been proposed to be backported to 7.7 z-stream (EUS).
Comment 4 Yumei Huang 2020-04-22 02:43:18 UTC 
Verify:
kernel: 3.10.0-1062.22.1.el7.x86_64 (both host and guest)
qemu-kvm-rhev-2.12.0-33.el7_7.11
microcode_ctl-2.1-53.7.el7_7.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	: 0x500002c


Inside guest, 

# grep micro /proc/cpuinfo | uniq
microcode	: 0x500002c


The microcode version is same, so the bug is fixed.